mirror of https://github.com/ethereum/go-ethereum
Bas van Kervel
9 years ago
parent
8db9d44ca9
commit
eae81465c1
@ -0,0 +1,74 @@ |
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// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package utils |
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import ( |
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"fmt" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/crypto" |
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"github.com/ethereum/go-ethereum/node" |
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"github.com/ethereum/go-ethereum/p2p" |
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rpc "github.com/ethereum/go-ethereum/rpc/v2" |
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) |
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// PublicWeb3API offers helper utils
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type PublicWeb3API struct { |
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stack *node.Node |
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} |
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// NewPublicWeb3API creates a new Web3Service instance
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func NewPublicWeb3API(stack *node.Node) *PublicWeb3API { |
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return &PublicWeb3API{stack} |
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} |
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// ClientVersion returns the node name
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func (s *PublicWeb3API) ClientVersion() string { |
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return s.stack.Server().Name |
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} |
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// Sha3 applies the ethereum sha3 implementation on the input.
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// It assumes the input is hex encoded.
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func (s *PublicWeb3API) Sha3(input string) string { |
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return common.ToHex(crypto.Sha3(common.FromHex(input))) |
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} |
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// PublicNetAPI offers network related RPC methods
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type PublicNetAPI struct { |
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net *p2p.Server |
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networkVersion int |
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} |
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// NewPublicNetAPI creates a new net api instance.
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func NewPublicNetAPI(net *p2p.Server, networkVersion int) *PublicNetAPI { |
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return &PublicNetAPI{net, networkVersion} |
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} |
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// Listening returns an indication if the node is listening for network connections.
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func (s *PublicNetAPI) Listening() bool { |
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return true // always listening
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} |
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// Peercount returns the number of connected peers
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func (s *PublicNetAPI) PeerCount() *rpc.HexNumber { |
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return rpc.NewHexNumber(s.net.PeerCount()) |
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} |
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// ProtocolVersion returns the current ethereum protocol version.
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func (s *PublicNetAPI) Version() string { |
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return fmt.Sprintf("%d", s.networkVersion) |
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} |
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File diff suppressed because it is too large
Load Diff
@ -0,0 +1,64 @@ |
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// Copyright 2015 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package downloader |
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import ( |
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rpc "github.com/ethereum/go-ethereum/rpc/v2" |
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) |
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// PublicDownloaderAPI provides an API which gives informatoin about the current synchronisation status.
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// It offers only methods that operates on data that can be available to anyone without security risks.
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type PublicDownloaderAPI struct { |
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d *Downloader |
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} |
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// NewPublicDownloaderAPI create a new PublicDownloaderAPI.
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func NewPublicDownloaderAPI(d *Downloader) *PublicDownloaderAPI { |
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return &PublicDownloaderAPI{d} |
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} |
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// Progress gives progress indications when the node is synchronising with the Ethereum network.
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type Progress struct { |
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Origin uint64 `json:"startingBlock"` |
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Current uint64 `json:"currentBlock"` |
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Height uint64 `json:"highestBlock"` |
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} |
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// SyncingResult provides information about the current synchronisation status for this node.
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type SyncingResult struct { |
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Syncing bool `json:"syncing"` |
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Status Progress `json:"status"` |
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} |
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// Syncing provides information when this nodes starts synchronising with the Ethereumn network and when it's finished.
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func (s *PublicDownloaderAPI) Syncing() (rpc.Subscription, error) { |
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sub := s.d.mux.Subscribe(StartEvent{}, DoneEvent{}, FailedEvent{}) |
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output := func(event interface{}) interface{} { |
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switch event.(type) { |
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case StartEvent: |
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result := &SyncingResult{Syncing: true} |
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result.Status.Origin, result.Status.Current, result.Status.Height = s.d.Progress() |
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return result |
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case DoneEvent, FailedEvent: |
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return false |
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} |
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return nil |
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} |
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return rpc.NewSubscriptionWithOutputFormat(sub, output), nil |
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} |
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@ -0,0 +1,575 @@ |
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// Copyright 2015 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
|
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// the Free Software Foundation, either version 3 of the License, or
|
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package filters |
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import ( |
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"sync" |
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"time" |
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"crypto/rand" |
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"encoding/hex" |
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"errors" |
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"encoding/json" |
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"fmt" |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/core/types" |
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"github.com/ethereum/go-ethereum/core/vm" |
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"github.com/ethereum/go-ethereum/ethdb" |
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"github.com/ethereum/go-ethereum/event" |
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rpc "github.com/ethereum/go-ethereum/rpc/v2" |
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) |
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var ( |
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filterTickerTime = 5 * time.Minute |
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) |
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// byte will be inferred
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const ( |
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unknownFilterTy = iota |
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blockFilterTy |
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transactionFilterTy |
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logFilterTy |
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) |
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// PublicFilterAPI offers support to create and manage filters. This will allow externa clients to retrieve various
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// information related to the Ethereum protocol such als blocks, transactions and logs.
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type PublicFilterAPI struct { |
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mux *event.TypeMux |
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quit chan struct{} |
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chainDb ethdb.Database |
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filterManager *FilterSystem |
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filterMapMu sync.RWMutex |
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filterMapping map[string]int // maps between filter internal filter identifiers and external filter identifiers
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logMu sync.RWMutex |
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logQueue map[int]*logQueue |
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blockMu sync.RWMutex |
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blockQueue map[int]*hashQueue |
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transactionMu sync.RWMutex |
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transactionQueue map[int]*hashQueue |
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transactMu sync.Mutex |
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} |
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// NewPublicFilterAPI returns a new PublicFilterAPI instance.
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func NewPublicFilterAPI(chainDb ethdb.Database, mux *event.TypeMux) *PublicFilterAPI { |
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svc := &PublicFilterAPI{ |
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mux: mux, |
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chainDb: chainDb, |
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filterManager: NewFilterSystem(mux), |
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filterMapping: make(map[string]int), |
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logQueue: make(map[int]*logQueue), |
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blockQueue: make(map[int]*hashQueue), |
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transactionQueue: make(map[int]*hashQueue), |
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} |
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go svc.start() |
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return svc |
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} |
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// Stop quits the work loop.
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func (s *PublicFilterAPI) Stop() { |
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close(s.quit) |
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} |
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// start the work loop, wait and process events.
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func (s *PublicFilterAPI) start() { |
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timer := time.NewTicker(2 * time.Second) |
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defer timer.Stop() |
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done: |
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for { |
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select { |
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case <-timer.C: |
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s.logMu.Lock() |
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for id, filter := range s.logQueue { |
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if time.Since(filter.timeout) > filterTickerTime { |
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s.filterManager.Remove(id) |
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delete(s.logQueue, id) |
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} |
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} |
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s.logMu.Unlock() |
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s.blockMu.Lock() |
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for id, filter := range s.blockQueue { |
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if time.Since(filter.timeout) > filterTickerTime { |
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s.filterManager.Remove(id) |
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delete(s.blockQueue, id) |
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} |
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} |
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s.blockMu.Unlock() |
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s.transactionMu.Lock() |
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for id, filter := range s.transactionQueue { |
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if time.Since(filter.timeout) > filterTickerTime { |
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s.filterManager.Remove(id) |
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delete(s.transactionQueue, id) |
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} |
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} |
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s.transactionMu.Unlock() |
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case <-s.quit: |
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break done |
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} |
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} |
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} |
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// NewBlockFilter create a new filter that returns blocks that are included into the canonical chain.
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func (s *PublicFilterAPI) NewBlockFilter() (string, error) { |
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externalId, err := newFilterId() |
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if err != nil { |
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return "", err |
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} |
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s.blockMu.Lock() |
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filter := New(s.chainDb) |
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id := s.filterManager.Add(filter) |
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s.blockQueue[id] = &hashQueue{timeout: time.Now()} |
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filter.BlockCallback = func(block *types.Block, logs vm.Logs) { |
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s.blockMu.Lock() |
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defer s.blockMu.Unlock() |
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if queue := s.blockQueue[id]; queue != nil { |
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queue.add(block.Hash()) |
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} |
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} |
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defer s.blockMu.Unlock() |
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s.filterMapMu.Lock() |
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s.filterMapping[externalId] = id |
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s.filterMapMu.Unlock() |
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return externalId, nil |
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} |
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// NewPendingTransactionFilter creates a filter that returns new pending transactions.
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func (s *PublicFilterAPI) NewPendingTransactionFilter() (string, error) { |
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externalId, err := newFilterId() |
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if err != nil { |
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return "", err |
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} |
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s.transactionMu.Lock() |
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defer s.transactionMu.Unlock() |
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filter := New(s.chainDb) |
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id := s.filterManager.Add(filter) |
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s.transactionQueue[id] = &hashQueue{timeout: time.Now()} |
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filter.TransactionCallback = func(tx *types.Transaction) { |
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s.transactionMu.Lock() |
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defer s.transactionMu.Unlock() |
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if queue := s.transactionQueue[id]; queue != nil { |
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queue.add(tx.Hash()) |
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} |
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} |
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s.filterMapMu.Lock() |
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s.filterMapping[externalId] = id |
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s.filterMapMu.Unlock() |
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return externalId, nil |
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} |
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// newLogFilter creates a new log filter.
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func (s *PublicFilterAPI) newLogFilter(earliest, latest int64, addresses []common.Address, topics [][]common.Hash) int { |
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s.logMu.Lock() |
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defer s.logMu.Unlock() |
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filter := New(s.chainDb) |
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id := s.filterManager.Add(filter) |
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s.logQueue[id] = &logQueue{timeout: time.Now()} |
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filter.SetBeginBlock(earliest) |
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filter.SetEndBlock(latest) |
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filter.SetAddresses(addresses) |
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filter.SetTopics(topics) |
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filter.LogsCallback = func(logs vm.Logs) { |
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s.logMu.Lock() |
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defer s.logMu.Unlock() |
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if queue := s.logQueue[id]; queue != nil { |
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queue.add(logs...) |
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} |
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} |
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return id |
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} |
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// NewFilterArgs represents a request to create a new filter.
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type NewFilterArgs struct { |
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FromBlock rpc.BlockNumber |
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ToBlock rpc.BlockNumber |
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Addresses []common.Address |
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Topics [][]common.Hash |
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} |
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func (args *NewFilterArgs) UnmarshalJSON(data []byte) error { |
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type input struct { |
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From *rpc.BlockNumber `json:"fromBlock"` |
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ToBlock *rpc.BlockNumber `json:"toBlock"` |
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Addresses interface{} `json:"address"` |
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Topics interface{} `json:"topics"` |
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} |
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var raw input |
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if err := json.Unmarshal(data, &raw); err != nil { |
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return err |
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} |
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if raw.From == nil { |
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args.FromBlock = rpc.LatestBlockNumber |
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} else { |
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args.FromBlock = *raw.From |
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} |
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if raw.ToBlock == nil { |
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args.ToBlock = rpc.LatestBlockNumber |
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} else { |
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args.ToBlock = *raw.ToBlock |
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} |
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args.Addresses = []common.Address{} |
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if raw.Addresses != nil { |
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// raw.Address can contain a single address or an array of addresses
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var addresses []common.Address |
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if strAddrs, ok := raw.Addresses.([]interface{}); ok { |
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for i, addr := range strAddrs { |
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if strAddr, ok := addr.(string); ok { |
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if len(strAddr) >= 2 && strAddr[0] == '0' && (strAddr[1] == 'x' || strAddr[1] == 'X') { |
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strAddr = strAddr[2:] |
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} |
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if decAddr, err := hex.DecodeString(strAddr); err == nil { |
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addresses = append(addresses, common.BytesToAddress(decAddr)) |
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} else { |
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fmt.Errorf("invalid address given") |
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} |
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} else { |
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return fmt.Errorf("invalid address on index %d", i) |
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} |
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} |
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} else if singleAddr, ok := raw.Addresses.(string); ok { |
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if len(singleAddr) >= 2 && singleAddr[0] == '0' && (singleAddr[1] == 'x' || singleAddr[1] == 'X') { |
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singleAddr = singleAddr[2:] |
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} |
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if decAddr, err := hex.DecodeString(singleAddr); err == nil { |
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addresses = append(addresses, common.BytesToAddress(decAddr)) |
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} else { |
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fmt.Errorf("invalid address given") |
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} |
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} else { |
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errors.New("invalid address(es) given") |
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} |
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args.Addresses = addresses |
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} |
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topicConverter := func(raw string) (common.Hash, error) { |
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if len(raw) == 0 { |
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return common.Hash{}, nil |
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} |
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if len(raw) >= 2 && raw[0] == '0' && (raw[1] == 'x' || raw[1] == 'X') { |
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raw = raw[2:] |
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} |
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if decAddr, err := hex.DecodeString(raw); err == nil { |
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return common.BytesToHash(decAddr), nil |
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} |
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return common.Hash{}, errors.New("invalid topic given") |
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} |
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|
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// topics is an array consisting of strings or arrays of strings
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if raw.Topics != nil { |
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topics, ok := raw.Topics.([]interface{}) |
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if ok { |
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parsedTopics := make([][]common.Hash, len(topics)) |
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for i, topic := range topics { |
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if topic == nil { |
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parsedTopics[i] = []common.Hash{common.StringToHash("")} |
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} else if strTopic, ok := topic.(string); ok { |
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if t, err := topicConverter(strTopic); err != nil { |
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return fmt.Errorf("invalid topic on index %d", i) |
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} else { |
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parsedTopics[i] = []common.Hash{t} |
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} |
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} else if arrTopic, ok := topic.([]interface{}); ok { |
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parsedTopics[i] = make([]common.Hash, len(arrTopic)) |
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for j := 0; j < len(parsedTopics[i]); i++ { |
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if arrTopic[j] == nil { |
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parsedTopics[i][j] = common.StringToHash("") |
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} else if str, ok := arrTopic[j].(string); ok { |
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if t, err := topicConverter(str); err != nil { |
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return fmt.Errorf("invalid topic on index %d", i) |
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} else { |
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parsedTopics[i] = []common.Hash{t} |
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} |
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} else { |
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fmt.Errorf("topic[%d][%d] not a string", i, j) |
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} |
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} |
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} else { |
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return fmt.Errorf("topic[%d] invalid", i) |
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} |
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} |
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args.Topics = parsedTopics |
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} |
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} |
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|
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return nil |
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} |
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|
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// NewFilter creates a new filter and returns the filter id. It can be uses to retrieve logs.
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func (s *PublicFilterAPI) NewFilter(args NewFilterArgs) (string, error) { |
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externalId, err := newFilterId() |
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if err != nil { |
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return "", err |
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} |
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|
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var id int |
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if len(args.Addresses) > 0 { |
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id = s.newLogFilter(args.FromBlock.Int64(), args.ToBlock.Int64(), args.Addresses, args.Topics) |
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} else { |
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id = s.newLogFilter(args.FromBlock.Int64(), args.ToBlock.Int64(), nil, args.Topics) |
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} |
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|
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s.filterMapMu.Lock() |
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s.filterMapping[externalId] = id |
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s.filterMapMu.Unlock() |
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|
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return externalId, nil |
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} |
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|
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// GetLogs returns the logs matching the given argument.
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func (s *PublicFilterAPI) GetLogs(args NewFilterArgs) vm.Logs { |
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filter := New(s.chainDb) |
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filter.SetBeginBlock(args.FromBlock.Int64()) |
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filter.SetEndBlock(args.ToBlock.Int64()) |
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filter.SetAddresses(args.Addresses) |
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filter.SetTopics(args.Topics) |
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|
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return returnLogs(filter.Find()) |
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} |
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|
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// UninstallFilter removes the filter with the given filter id.
|
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func (s *PublicFilterAPI) UninstallFilter(filterId string) bool { |
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s.filterMapMu.Lock() |
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defer s.filterMapMu.Unlock() |
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|
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id, ok := s.filterMapping[filterId] |
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if !ok { |
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return false |
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} |
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|
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defer s.filterManager.Remove(id) |
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delete(s.filterMapping, filterId) |
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|
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if _, ok := s.logQueue[id]; ok { |
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s.logMu.Lock() |
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defer s.logMu.Unlock() |
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delete(s.logQueue, id) |
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return true |
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} |
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if _, ok := s.blockQueue[id]; ok { |
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s.blockMu.Lock() |
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defer s.blockMu.Unlock() |
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delete(s.blockQueue, id) |
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return true |
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} |
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if _, ok := s.transactionQueue[id]; ok { |
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s.transactionMu.Lock() |
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defer s.transactionMu.Unlock() |
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delete(s.transactionQueue, id) |
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return true |
||||
} |
||||
|
||||
return false |
||||
} |
||||
|
||||
// getFilterType is a helper utility that determine the type of filter for the given filter id.
|
||||
func (s *PublicFilterAPI) getFilterType(id int) byte { |
||||
if _, ok := s.blockQueue[id]; ok { |
||||
return blockFilterTy |
||||
} else if _, ok := s.transactionQueue[id]; ok { |
||||
return transactionFilterTy |
||||
} else if _, ok := s.logQueue[id]; ok { |
||||
return logFilterTy |
||||
} |
||||
|
||||
return unknownFilterTy |
||||
} |
||||
|
||||
// blockFilterChanged returns a collection of block hashes for the block filter with the given id.
|
||||
func (s *PublicFilterAPI) blockFilterChanged(id int) []common.Hash { |
||||
s.blockMu.Lock() |
||||
defer s.blockMu.Unlock() |
||||
|
||||
if s.blockQueue[id] != nil { |
||||
return s.blockQueue[id].get() |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// transactionFilterChanged returns a collection of transaction hashes for the pending
|
||||
// transaction filter with the given id.
|
||||
func (s *PublicFilterAPI) transactionFilterChanged(id int) []common.Hash { |
||||
s.blockMu.Lock() |
||||
defer s.blockMu.Unlock() |
||||
|
||||
if s.transactionQueue[id] != nil { |
||||
return s.transactionQueue[id].get() |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// logFilterChanged returns a collection of logs for the log filter with the given id.
|
||||
func (s *PublicFilterAPI) logFilterChanged(id int) vm.Logs { |
||||
s.logMu.Lock() |
||||
defer s.logMu.Unlock() |
||||
|
||||
if s.logQueue[id] != nil { |
||||
return s.logQueue[id].get() |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// GetFilterLogs returns the logs for the filter with the given id.
|
||||
func (s *PublicFilterAPI) GetFilterLogs(filterId string) vm.Logs { |
||||
id, ok := s.filterMapping[filterId] |
||||
if !ok { |
||||
return returnLogs(nil) |
||||
} |
||||
|
||||
if filter := s.filterManager.Get(id); filter != nil { |
||||
return returnLogs(filter.Find()) |
||||
} |
||||
|
||||
return returnLogs(nil) |
||||
} |
||||
|
||||
// GetFilterChanges returns the logs for the filter with the given id since last time is was called.
|
||||
// This can be used for polling.
|
||||
func (s *PublicFilterAPI) GetFilterChanges(filterId string) interface{} { |
||||
s.filterMapMu.Lock() |
||||
id, ok := s.filterMapping[filterId] |
||||
s.filterMapMu.Unlock() |
||||
|
||||
if !ok { // filter not found
|
||||
return []interface{}{} |
||||
} |
||||
|
||||
switch s.getFilterType(id) { |
||||
case blockFilterTy: |
||||
return returnHashes(s.blockFilterChanged(id)) |
||||
case transactionFilterTy: |
||||
return returnHashes(s.transactionFilterChanged(id)) |
||||
case logFilterTy: |
||||
return returnLogs(s.logFilterChanged(id)) |
||||
} |
||||
|
||||
return []interface{}{} |
||||
} |
||||
|
||||
type logQueue struct { |
||||
mu sync.Mutex |
||||
|
||||
logs vm.Logs |
||||
timeout time.Time |
||||
id int |
||||
} |
||||
|
||||
func (l *logQueue) add(logs ...*vm.Log) { |
||||
l.mu.Lock() |
||||
defer l.mu.Unlock() |
||||
|
||||
l.logs = append(l.logs, logs...) |
||||
} |
||||
|
||||
func (l *logQueue) get() vm.Logs { |
||||
l.mu.Lock() |
||||
defer l.mu.Unlock() |
||||
|
||||
l.timeout = time.Now() |
||||
tmp := l.logs |
||||
l.logs = nil |
||||
return tmp |
||||
} |
||||
|
||||
type hashQueue struct { |
||||
mu sync.Mutex |
||||
|
||||
hashes []common.Hash |
||||
timeout time.Time |
||||
id int |
||||
} |
||||
|
||||
func (l *hashQueue) add(hashes ...common.Hash) { |
||||
l.mu.Lock() |
||||
defer l.mu.Unlock() |
||||
|
||||
l.hashes = append(l.hashes, hashes...) |
||||
} |
||||
|
||||
func (l *hashQueue) get() []common.Hash { |
||||
l.mu.Lock() |
||||
defer l.mu.Unlock() |
||||
|
||||
l.timeout = time.Now() |
||||
tmp := l.hashes |
||||
l.hashes = nil |
||||
return tmp |
||||
} |
||||
|
||||
// newFilterId generates a new random filter identifier that can be exposed to the outer world. By publishing random
|
||||
// identifiers it is not feasible for DApp's to guess filter id's for other DApp's and uninstall or poll for them
|
||||
// causing the affected DApp to miss data.
|
||||
func newFilterId() (string, error) { |
||||
var subid [16]byte |
||||
n, _ := rand.Read(subid[:]) |
||||
if n != 16 { |
||||
return "", errors.New("Unable to generate filter id") |
||||
} |
||||
return "0x" + hex.EncodeToString(subid[:]), nil |
||||
} |
||||
|
||||
// returnLogs is a helper that will return an empty logs array case the given logs is nil, otherwise is will return the
|
||||
// given logs. The RPC interfaces defines that always an array is returned.
|
||||
func returnLogs(logs vm.Logs) vm.Logs { |
||||
if logs == nil { |
||||
return vm.Logs{} |
||||
} |
||||
return logs |
||||
} |
||||
|
||||
// returnHashes is a helper that will return an empty hash array case the given hash array is nil, otherwise is will
|
||||
// return the given hashes. The RPC interfaces defines that always an array is returned.
|
||||
func returnHashes(hashes []common.Hash) []common.Hash { |
||||
if hashes == nil { |
||||
return []common.Hash{} |
||||
} |
||||
return hashes |
||||
} |
||||
@ -0,0 +1,72 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of go-ethereum.
|
||||
//
|
||||
// go-ethereum is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// go-ethereum is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package miner |
||||
|
||||
import ( |
||||
"fmt" |
||||
|
||||
"github.com/ethereum/go-ethereum/common" |
||||
"github.com/ethereum/go-ethereum/logger/glog" |
||||
rpc "github.com/ethereum/go-ethereum/rpc/v2" |
||||
) |
||||
|
||||
// PublicMinerAPI provides an API to control the miner.
|
||||
// It offers only methods that operate on data that pose no security risk when it is publicly accessible.
|
||||
type PublicMinerAPI struct { |
||||
miner *Miner |
||||
agent *RemoteAgent |
||||
} |
||||
|
||||
// NewPublicMinerAPI create a new PublicMinerAPI instance.
|
||||
func NewPublicMinerAPI(miner *Miner) *PublicMinerAPI { |
||||
return &PublicMinerAPI{miner, NewRemoteAgent()} |
||||
} |
||||
|
||||
// Mining returns an indication if this node is currently mining.
|
||||
func (s *PublicMinerAPI) Mining() bool { |
||||
return s.miner.Mining() |
||||
} |
||||
|
||||
// SubmitWork can be used by external miner to submit their POW solution. It returns an indication if the work was
|
||||
// accepted. Note, this is not an indication if the provided work was valid!
|
||||
func (s *PublicMinerAPI) SubmitWork(nonce rpc.HexNumber, solution, digest common.Hash) bool { |
||||
return s.agent.SubmitWork(nonce.Uint64(), digest, solution) |
||||
} |
||||
|
||||
// GetWork returns a work package for external miner. The work package consists of 3 strings
|
||||
// result[0], 32 bytes hex encoded current block header pow-hash
|
||||
// result[1], 32 bytes hex encoded seed hash used for DAG
|
||||
// result[2], 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
|
||||
func (s *PublicMinerAPI) GetWork() ([]string, error) { |
||||
if !s.Mining() { |
||||
s.miner.Start(s.miner.coinbase, 0) |
||||
} |
||||
if work, err := s.agent.GetWork(); err == nil { |
||||
return work[:], nil |
||||
} else { |
||||
glog.Infof("%v\n", err) |
||||
} |
||||
return nil, fmt.Errorf("mining not ready") |
||||
} |
||||
|
||||
// SubmitHashrate can be used for remote miners to submit their hash rate. This enables the node to report the combined
|
||||
// hash rate of all miners which submit work through this node. It accepts the miner hash rate and an identifier which
|
||||
// must be unique between nodes.
|
||||
func (s *PublicMinerAPI) SubmitHashrate(hashrate rpc.HexNumber, id common.Hash) bool { |
||||
s.agent.SubmitHashrate(id, hashrate.Uint64()) |
||||
return true |
||||
} |
||||
@ -0,0 +1,102 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
/* |
||||
Package rpc provides access to the exported methods of an object across a network |
||||
or other I/O connection. After creating a server instance objects can be registered, |
||||
making it visible from the outside. Exported methods that follow specific |
||||
conventions can be called remotely. It also has support for the publish/subscribe |
||||
pattern. |
||||
|
||||
Methods that satisfy the following criteria are made available for remote access: |
||||
- object must be exported |
||||
- method must be exported |
||||
- method returns 0, 1 (response or error) or 2 (response and error) values |
||||
- method argument(s) must be exported or builtin types |
||||
- method returned value(s) must be exported or builtin types |
||||
|
||||
An example method: |
||||
func (s *CalcService) Div(a, b int) (int, error) |
||||
|
||||
When the returned error isn't nil the returned integer is ignored and the error is |
||||
send back to the client. Otherwise the returned integer is send back to the client. |
||||
|
||||
The server offers the ServeCodec method which accepts a ServerCodec instance. It will |
||||
read requests from the codec, process the request and sends the response back to the |
||||
client using the codec. The server can execute requests concurrently. Responses |
||||
can be send back to the client out of order. |
||||
|
||||
An example server which uses the JSON codec: |
||||
type CalculatorService struct {} |
||||
|
||||
func (s *CalculatorService) Add(a, b int) int { |
||||
return a + b |
||||
} |
||||
|
||||
func (s *CalculatorService Div(a, b int) (int, error) { |
||||
if b == 0 { |
||||
return 0, errors.New("divide by zero") |
||||
} |
||||
return a/b, nil |
||||
} |
||||
|
||||
calculator := new(CalculatorService) |
||||
server := NewServer() |
||||
server.RegisterName("calculator", calculator") |
||||
|
||||
l, _ := net.ListenUnix("unix", &net.UnixAddr{Net: "unix", Name: "/tmp/calculator.sock"}) |
||||
for { |
||||
c, _ := l.AcceptUnix() |
||||
codec := v2.NewJSONCodec(c) |
||||
go server.ServeCodec(codec) |
||||
} |
||||
|
||||
The package also supports the publish subscribe pattern through the use of subscriptions. |
||||
A method that is considered eligible for notifications must satisfy the following criteria: |
||||
- object must be exported |
||||
- method must be exported |
||||
- method argument(s) must be exported or builtin types |
||||
- method must return the tuple Subscription, error |
||||
|
||||
|
||||
An example method: |
||||
func (s *BlockChainService) Head() (Subscription, error) { |
||||
sub := s.bc.eventMux.Subscribe(ChainHeadEvent{}) |
||||
return v2.NewSubscription(sub), nil |
||||
} |
||||
|
||||
This method will push all raised ChainHeadEvents to subscribed clients. If the client is only |
||||
interested in every N'th block it is possible to add a criteria. |
||||
|
||||
func (s *BlockChainService) HeadFiltered(nth uint64) (Subscription, error) { |
||||
sub := s.bc.eventMux.Subscribe(ChainHeadEvent{}) |
||||
|
||||
criteria := func(event interface{}) bool { |
||||
chainHeadEvent := event.(ChainHeadEvent) |
||||
if chainHeadEvent.Block.NumberU64() % nth == 0 { |
||||
return true |
||||
} |
||||
return false |
||||
} |
||||
|
||||
return v2.NewSubscriptionFiltered(sub, criteria), nil |
||||
} |
||||
|
||||
Subscriptions are deleted when: |
||||
- the user sends an unsubscribe request |
||||
- the connection which was used to create the subscription is closed |
||||
*/ |
||||
package v2 |
||||
@ -0,0 +1,85 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package v2 |
||||
|
||||
import "fmt" |
||||
|
||||
// request is for an unknown service
|
||||
type methodNotFoundError struct { |
||||
service string |
||||
method string |
||||
} |
||||
|
||||
func (e *methodNotFoundError) Code() int { |
||||
return -32601 |
||||
} |
||||
|
||||
func (e *methodNotFoundError) Error() string { |
||||
return fmt.Sprintf("The method %s%s%s does not exist/is not available", e.service, serviceMethodSeparator, e.method) |
||||
} |
||||
|
||||
// received message isn't a valid request
|
||||
type invalidRequestError struct { |
||||
message string |
||||
} |
||||
|
||||
func (e *invalidRequestError) Code() int { |
||||
return -32600 |
||||
} |
||||
|
||||
func (e *invalidRequestError) Error() string { |
||||
return e.message |
||||
} |
||||
|
||||
// received message is invalid
|
||||
type invalidMessageError struct { |
||||
message string |
||||
} |
||||
|
||||
func (e *invalidMessageError) Code() int { |
||||
return -32700 |
||||
} |
||||
|
||||
func (e *invalidMessageError) Error() string { |
||||
return e.message |
||||
} |
||||
|
||||
// unable to decode supplied params, or an invalid number of parameters
|
||||
type invalidParamsError struct { |
||||
message string |
||||
} |
||||
|
||||
func (e *invalidParamsError) Code() int { |
||||
return -32602 |
||||
} |
||||
|
||||
func (e *invalidParamsError) Error() string { |
||||
return e.message |
||||
} |
||||
|
||||
// logic error, callback returned an error
|
||||
type callbackError struct { |
||||
message string |
||||
} |
||||
|
||||
func (e *callbackError) Code() int { |
||||
return -32000 |
||||
} |
||||
|
||||
func (e *callbackError) Error() string { |
||||
return e.message |
||||
} |
||||
@ -0,0 +1,343 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package v2 |
||||
|
||||
import ( |
||||
"encoding/json" |
||||
"fmt" |
||||
"io" |
||||
"reflect" |
||||
"strings" |
||||
"sync/atomic" |
||||
|
||||
"github.com/ethereum/go-ethereum/logger" |
||||
"github.com/ethereum/go-ethereum/logger/glog" |
||||
) |
||||
|
||||
const ( |
||||
jsonRPCVersion = "2.0" |
||||
serviceMethodSeparator = "_" |
||||
subscribeMethod = "eth_subscribe" |
||||
unsubscribeMethod = "eth_unsubscribe" |
||||
notificationMethod = "eth_subscription" |
||||
) |
||||
|
||||
// JSON-RPC request
|
||||
type jsonRequest struct { |
||||
Method string `json:"method"` |
||||
Version string `json:"jsonrpc"` |
||||
Id *int64 `json:"id,omitempty"` |
||||
Payload json.RawMessage `json:"params"` |
||||
} |
||||
|
||||
// JSON-RPC response
|
||||
type jsonSuccessResponse struct { |
||||
Version string `json:"jsonrpc"` |
||||
Id int64 `json:"id"` |
||||
Result interface{} `json:"result,omitempty"` |
||||
} |
||||
|
||||
// JSON-RPC error object
|
||||
type jsonError struct { |
||||
Code int `json:"code"` |
||||
Message string `json:"message"` |
||||
Data interface{} `json:"data,omitempty"` |
||||
} |
||||
|
||||
// JSON-RPC error response
|
||||
type jsonErrResponse struct { |
||||
Version string `json:"jsonrpc"` |
||||
Id *int64 `json:"id,omitempty"` |
||||
Error jsonError `json:"error"` |
||||
} |
||||
|
||||
// JSON-RPC notification payload
|
||||
type jsonSubscription struct { |
||||
Subscription string `json:"subscription"` |
||||
Result interface{} `json:"result,omitempty"` |
||||
} |
||||
|
||||
// JSON-RPC notification
|
||||
type jsonNotification struct { |
||||
Version string `json:"jsonrpc"` |
||||
Method string `json:"method"` |
||||
Params jsonSubscription `json:"params"` |
||||
} |
||||
|
||||
// jsonCodec reads and writes JSON-RPC messages to the underlying connection. It also has support for parsing arguments
|
||||
// and serializing (result) objects.
|
||||
type jsonCodec struct { |
||||
closed chan interface{} |
||||
isClosed int32 |
||||
d *json.Decoder |
||||
e *json.Encoder |
||||
req jsonRequest |
||||
rw io.ReadWriteCloser |
||||
} |
||||
|
||||
// NewJSONCodec creates a new RPC server codec with support for JSON-RPC 2.0
|
||||
func NewJSONCodec(rwc io.ReadWriteCloser) ServerCodec { |
||||
d := json.NewDecoder(rwc) |
||||
d.UseNumber() |
||||
return &jsonCodec{closed: make(chan interface{}), d: d, e: json.NewEncoder(rwc), rw: rwc, isClosed: 0} |
||||
} |
||||
|
||||
// isBatch returns true when the first non-whitespace characters is '['
|
||||
func isBatch(msg json.RawMessage) bool { |
||||
for _, c := range msg { |
||||
// skip insignificant whitespace (http://www.ietf.org/rfc/rfc4627.txt)
|
||||
if c == 0x20 || c == 0x09 || c == 0x0a || c == 0x0d { |
||||
continue |
||||
} |
||||
return c == '[' |
||||
} |
||||
return false |
||||
} |
||||
|
||||
// ReadRequestHeaders will read new requests without parsing the arguments. It will return a collection of requests, an
|
||||
// indication if these requests are in batch form or an error when the incoming message could not be read/parsed.
|
||||
func (c *jsonCodec) ReadRequestHeaders() ([]rpcRequest, bool, RPCError) { |
||||
var incomingMsg json.RawMessage |
||||
if err := c.d.Decode(&incomingMsg); err != nil { |
||||
return nil, false, &invalidRequestError{err.Error()} |
||||
} |
||||
|
||||
if isBatch(incomingMsg) { |
||||
return parseBatchRequest(incomingMsg) |
||||
} |
||||
|
||||
return parseRequest(incomingMsg) |
||||
} |
||||
|
||||
// parseRequest will parse a single request from the given RawMessage. It will return the parsed request, an indication
|
||||
// if the request was a batch or an error when the request could not be parsed.
|
||||
func parseRequest(incomingMsg json.RawMessage) ([]rpcRequest, bool, RPCError) { |
||||
var in jsonRequest |
||||
if err := json.Unmarshal(incomingMsg, &in); err != nil { |
||||
return nil, false, &invalidMessageError{err.Error()} |
||||
} |
||||
|
||||
if in.Id == nil { |
||||
return nil, false, &invalidMessageError{"Server cannot handle notifications"} |
||||
} |
||||
|
||||
// subscribe are special, they will always use `subscribeMethod` as service method
|
||||
if in.Method == subscribeMethod { |
||||
reqs := []rpcRequest{rpcRequest{id: *in.Id, isPubSub: true}} |
||||
if len(in.Payload) > 0 { |
||||
// first param must be subscription name
|
||||
var subscribeMethod [1]string |
||||
if err := json.Unmarshal(in.Payload, &subscribeMethod); err != nil { |
||||
glog.V(logger.Debug).Infof("Unable to parse subscription method: %v\n", err) |
||||
return nil, false, &invalidRequestError{"Unable to parse subscription request"} |
||||
} |
||||
|
||||
// all subscriptions are made on the eth service
|
||||
reqs[0].service, reqs[0].method = "eth", subscribeMethod[0] |
||||
reqs[0].params = in.Payload |
||||
return reqs, false, nil |
||||
} |
||||
return nil, false, &invalidRequestError{"Unable to parse subscription request"} |
||||
} |
||||
|
||||
if in.Method == unsubscribeMethod { |
||||
return []rpcRequest{rpcRequest{id: *in.Id, isPubSub: true, |
||||
method: unsubscribeMethod, params: in.Payload}}, false, nil |
||||
} |
||||
|
||||
// regular RPC call
|
||||
elems := strings.Split(in.Method, serviceMethodSeparator) |
||||
if len(elems) != 2 { |
||||
return nil, false, &methodNotFoundError{in.Method, ""} |
||||
} |
||||
|
||||
if len(in.Payload) == 0 { |
||||
return []rpcRequest{rpcRequest{service: elems[0], method: elems[1], id: *in.Id}}, false, nil |
||||
} |
||||
|
||||
return []rpcRequest{rpcRequest{service: elems[0], method: elems[1], id: *in.Id, params: in.Payload}}, false, nil |
||||
} |
||||
|
||||
// parseBatchRequest will parse a batch request into a collection of requests from the given RawMessage, an indication
|
||||
// if the request was a batch or an error when the request could not be read.
|
||||
func parseBatchRequest(incomingMsg json.RawMessage) ([]rpcRequest, bool, RPCError) { |
||||
var in []jsonRequest |
||||
if err := json.Unmarshal(incomingMsg, &in); err != nil { |
||||
return nil, false, &invalidMessageError{err.Error()} |
||||
} |
||||
|
||||
requests := make([]rpcRequest, len(in)) |
||||
for i, r := range in { |
||||
if r.Id == nil { |
||||
return nil, true, &invalidMessageError{"Server cannot handle notifications"} |
||||
} |
||||
|
||||
// (un)subscribe are special, they will always use the same service.method
|
||||
if r.Method == subscribeMethod { |
||||
requests[i] = rpcRequest{id: *r.Id, isPubSub: true} |
||||
if len(r.Payload) > 0 { |
||||
var subscribeMethod [1]string |
||||
if err := json.Unmarshal(r.Payload, &subscribeMethod); err != nil { |
||||
glog.V(logger.Debug).Infof("Unable to parse subscription method: %v\n", err) |
||||
return nil, false, &invalidRequestError{"Unable to parse subscription request"} |
||||
} |
||||
|
||||
// all subscriptions are made on the eth service
|
||||
requests[i].service, requests[i].method = "eth", subscribeMethod[0] |
||||
requests[i].params = r.Payload |
||||
continue |
||||
} |
||||
|
||||
return nil, true, &invalidRequestError{"Unable to parse (un)subscribe request arguments"} |
||||
} |
||||
|
||||
if r.Method == unsubscribeMethod { |
||||
requests[i] = rpcRequest{id: *r.Id, isPubSub: true, method: unsubscribeMethod, params: r.Payload} |
||||
continue |
||||
} |
||||
|
||||
elems := strings.Split(r.Method, serviceMethodSeparator) |
||||
if len(elems) != 2 { |
||||
return nil, true, &methodNotFoundError{r.Method, ""} |
||||
} |
||||
|
||||
if len(r.Payload) == 0 { |
||||
requests[i] = rpcRequest{service: elems[0], method: elems[1], id: *r.Id, params: nil} |
||||
} else { |
||||
requests[i] = rpcRequest{service: elems[0], method: elems[1], id: *r.Id, params: r.Payload} |
||||
} |
||||
} |
||||
|
||||
return requests, true, nil |
||||
} |
||||
|
||||
// ParseRequestArguments tries to parse the given params (json.RawMessage) with the given types. It returns the parsed
|
||||
// values or an error when the parsing failed.
|
||||
func (c *jsonCodec) ParseRequestArguments(argTypes []reflect.Type, params interface{}) ([]reflect.Value, RPCError) { |
||||
if args, ok := params.(json.RawMessage); !ok { |
||||
return nil, &invalidParamsError{"Invalid params supplied"} |
||||
} else { |
||||
return parsePositionalArguments(args, argTypes) |
||||
} |
||||
} |
||||
|
||||
func countArguments(args json.RawMessage) (int, error) { |
||||
var cnt []interface{} |
||||
if err := json.Unmarshal(args, &cnt); err != nil { |
||||
return -1, nil |
||||
} |
||||
return len(cnt), nil |
||||
} |
||||
|
||||
// parsePositionalArguments tries to parse the given args to an array of values with the given types. It returns the
|
||||
// parsed values or an error when the args could not be parsed.
|
||||
func parsePositionalArguments(args json.RawMessage, argTypes []reflect.Type) ([]reflect.Value, RPCError) { |
||||
argValues := make([]reflect.Value, len(argTypes)) |
||||
params := make([]interface{}, len(argTypes)) |
||||
|
||||
n, err := countArguments(args) |
||||
if err != nil { |
||||
return nil, &invalidParamsError{err.Error()} |
||||
} |
||||
if n != len(argTypes) { |
||||
return nil, &invalidParamsError{fmt.Sprintf("insufficient params, want %d have %d", len(argTypes), n)} |
||||
} |
||||
|
||||
for i, t := range argTypes { |
||||
if t.Kind() == reflect.Ptr { |
||||
// values must be pointers for the Unmarshal method, reflect.
|
||||
// Dereference otherwise reflect.New would create **SomeType
|
||||
argValues[i] = reflect.New(t.Elem()) |
||||
params[i] = argValues[i].Interface() |
||||
|
||||
// when not specified blockNumbers are by default latest (-1)
|
||||
if blockNumber, ok := params[i].(*BlockNumber); ok { |
||||
*blockNumber = BlockNumber(-1) |
||||
} |
||||
} else { |
||||
argValues[i] = reflect.New(t) |
||||
params[i] = argValues[i].Interface() |
||||
|
||||
// when not specified blockNumbers are by default latest (-1)
|
||||
if blockNumber, ok := params[i].(*BlockNumber); ok { |
||||
*blockNumber = BlockNumber(-1) |
||||
} |
||||
} |
||||
} |
||||
|
||||
if err := json.Unmarshal(args, ¶ms); err != nil { |
||||
return nil, &invalidParamsError{err.Error()} |
||||
} |
||||
|
||||
// Convert pointers back to values where necessary
|
||||
for i, a := range argValues { |
||||
if a.Kind() != argTypes[i].Kind() { |
||||
argValues[i] = reflect.Indirect(argValues[i]) |
||||
} |
||||
} |
||||
|
||||
return argValues, nil |
||||
} |
||||
|
||||
// CreateResponse will create a JSON-RPC success response with the given id and reply as result.
|
||||
func (c *jsonCodec) CreateResponse(id int64, reply interface{}) interface{} { |
||||
if isHexNum(reflect.TypeOf(reply)) { |
||||
return &jsonSuccessResponse{Version: jsonRPCVersion, Id: id, Result: fmt.Sprintf(`%#x`, reply)} |
||||
} |
||||
return &jsonSuccessResponse{Version: jsonRPCVersion, Id: id, Result: reply} |
||||
} |
||||
|
||||
// CreateErrorResponse will create a JSON-RPC error response with the given id and error.
|
||||
func (c *jsonCodec) CreateErrorResponse(id *int64, err RPCError) interface{} { |
||||
return &jsonErrResponse{Version: jsonRPCVersion, Id: id, Error: jsonError{Code: err.Code(), Message: err.Error()}} |
||||
} |
||||
|
||||
// CreateErrorResponseWithInfo will create a JSON-RPC error response with the given id and error.
|
||||
// info is optional and contains additional information about the error. When an empty string is passed it is ignored.
|
||||
func (c *jsonCodec) CreateErrorResponseWithInfo(id *int64, err RPCError, info interface{}) interface{} { |
||||
return &jsonErrResponse{Version: jsonRPCVersion, Id: id, |
||||
Error: jsonError{Code: err.Code(), Message: err.Error(), Data: info}} |
||||
} |
||||
|
||||
// CreateNotification will create a JSON-RPC notification with the given subscription id and event as params.
|
||||
func (c *jsonCodec) CreateNotification(subid string, event interface{}) interface{} { |
||||
if isHexNum(reflect.TypeOf(event)) { |
||||
return &jsonNotification{Version: jsonRPCVersion, Method: notificationMethod, |
||||
Params: jsonSubscription{Subscription: subid, Result: fmt.Sprintf(`%#x`, event)}} |
||||
} |
||||
|
||||
return &jsonNotification{Version: jsonRPCVersion, Method: notificationMethod, |
||||
Params: jsonSubscription{Subscription: subid, Result: event}} |
||||
} |
||||
|
||||
// Write message to client
|
||||
func (c *jsonCodec) Write(res interface{}) error { |
||||
return c.e.Encode(res) |
||||
} |
||||
|
||||
// Close the underlying connection
|
||||
func (c *jsonCodec) Close() { |
||||
if atomic.CompareAndSwapInt32(&c.isClosed, 0, 1) { |
||||
close(c.closed) |
||||
c.rw.Close() |
||||
} |
||||
} |
||||
|
||||
// Closed returns a channel which will be closed when Close is called
|
||||
func (c *jsonCodec) Closed() <-chan interface{} { |
||||
return c.closed |
||||
} |
||||
@ -0,0 +1,73 @@ |
||||
package v2 |
||||
|
||||
import ( |
||||
"bufio" |
||||
"bytes" |
||||
"reflect" |
||||
"testing" |
||||
) |
||||
|
||||
type RWC struct { |
||||
*bufio.ReadWriter |
||||
} |
||||
|
||||
func (rwc *RWC) Close() error { |
||||
return nil |
||||
} |
||||
|
||||
func TestJSONRequestParsing(t *testing.T) { |
||||
server := NewServer() |
||||
service := new(Service) |
||||
|
||||
if err := server.RegisterName("calc", service); err != nil { |
||||
t.Fatalf("%v", err) |
||||
} |
||||
|
||||
req := bytes.NewBufferString(`{"id": 1234, "jsonrpc": "2.0", "method": "calc_add", "params": [11, 22]}`) |
||||
var str string |
||||
reply := bytes.NewBufferString(str) |
||||
rw := &RWC{bufio.NewReadWriter(bufio.NewReader(req), bufio.NewWriter(reply))} |
||||
|
||||
codec := NewJSONCodec(rw) |
||||
|
||||
requests, batch, err := codec.ReadRequestHeaders() |
||||
if err != nil { |
||||
t.Fatalf("%v", err) |
||||
} |
||||
|
||||
if batch { |
||||
t.Fatalf("Request isn't a batch") |
||||
} |
||||
|
||||
if len(requests) != 1 { |
||||
t.Fatalf("Expected 1 request but got %d requests - %v", len(requests), requests) |
||||
} |
||||
|
||||
if requests[0].service != "calc" { |
||||
t.Fatalf("Expected service 'calc' but got '%s'", requests[0].service) |
||||
} |
||||
|
||||
if requests[0].method != "add" { |
||||
t.Fatalf("Expected method 'Add' but got '%s'", requests[0].method) |
||||
} |
||||
|
||||
if requests[0].id != 1234 { |
||||
t.Fatalf("Expected id 1234 but got %d", requests[0].id) |
||||
} |
||||
|
||||
var arg int |
||||
args := []reflect.Type{reflect.TypeOf(arg), reflect.TypeOf(arg)} |
||||
|
||||
v, err := codec.ParseRequestArguments(args, requests[0].params) |
||||
if err != nil { |
||||
t.Fatalf("%v", err) |
||||
} |
||||
|
||||
if len(v) != 2 { |
||||
t.Fatalf("Expected 2 argument values, got %d", len(v)) |
||||
} |
||||
|
||||
if v[0].Int() != 11 || v[1].Int() != 22 { |
||||
t.Fatalf("expected %d == 11 && %d == 22", v[0].Int(), v[1].Int()) |
||||
} |
||||
} |
||||
@ -0,0 +1,378 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package v2 |
||||
|
||||
import ( |
||||
"fmt" |
||||
"reflect" |
||||
|
||||
"runtime" |
||||
|
||||
"github.com/ethereum/go-ethereum/event" |
||||
"github.com/ethereum/go-ethereum/logger" |
||||
"github.com/ethereum/go-ethereum/logger/glog" |
||||
) |
||||
|
||||
// NewServer will create a new server instance with no registered handlers.
|
||||
func NewServer() *Server { |
||||
server := &Server{services: make(serviceRegistry), subscriptions: make(subscriptionRegistry)} |
||||
|
||||
// register a default service which will provide meta information about the RPC service such as the services and
|
||||
// methods it offers.
|
||||
rpcService := &RPCService{server} |
||||
server.RegisterName("rpc", rpcService) |
||||
|
||||
return server |
||||
} |
||||
|
||||
// RPCService gives meta information about the server.
|
||||
// e.g. gives information about the loaded modules.
|
||||
type RPCService struct { |
||||
server *Server |
||||
} |
||||
|
||||
// Modules returns the list of RPC services with their version number
|
||||
func (s *RPCService) Modules() map[string]string { |
||||
modules := make(map[string]string) |
||||
for name, _ := range s.server.services { |
||||
modules[name] = "1.0" |
||||
} |
||||
return modules |
||||
} |
||||
|
||||
// RegisterName will create an service for the given rcvr type under the given name. When no methods on the given rcvr
|
||||
// match the criteria to be either a RPC method or a subscription an error is returned. Otherwise a new service is
|
||||
// created and added to the service collection this server instance serves.
|
||||
func (s *Server) RegisterName(name string, rcvr interface{}) error { |
||||
if s.services == nil { |
||||
s.services = make(serviceRegistry) |
||||
} |
||||
|
||||
svc := new(service) |
||||
svc.typ = reflect.TypeOf(rcvr) |
||||
rcvrVal := reflect.ValueOf(rcvr) |
||||
|
||||
if name == "" { |
||||
return fmt.Errorf("no service name for type %s", svc.typ.String()) |
||||
} |
||||
if !isExported(reflect.Indirect(rcvrVal).Type().Name()) { |
||||
return fmt.Errorf("%s is not exported", reflect.Indirect(rcvrVal).Type().Name()) |
||||
} |
||||
|
||||
// already a previous service register under given sname, merge methods/subscriptions
|
||||
if regsvc, present := s.services[name]; present { |
||||
methods, subscriptions := suitableCallbacks(rcvrVal, svc.typ) |
||||
if len(methods) == 0 && len(subscriptions) == 0 { |
||||
return fmt.Errorf("Service doesn't have any suitable methods/subscriptions to expose") |
||||
} |
||||
|
||||
for _, m := range methods { |
||||
regsvc.callbacks[formatName(m.method.Name)] = m |
||||
} |
||||
for _, s := range subscriptions { |
||||
regsvc.subscriptions[formatName(s.method.Name)] = s |
||||
} |
||||
|
||||
return nil |
||||
} |
||||
|
||||
svc.name = name |
||||
svc.callbacks, svc.subscriptions = suitableCallbacks(rcvrVal, svc.typ) |
||||
|
||||
if len(svc.callbacks) == 0 && len(svc.subscriptions) == 0 { |
||||
return fmt.Errorf("Service doesn't have any suitable methods/subscriptions to expose") |
||||
} |
||||
|
||||
s.services[svc.name] = svc |
||||
|
||||
return nil |
||||
} |
||||
|
||||
// ServeCodec reads incoming requests from codec, calls the appropriate callback and writes the
|
||||
// response back using the given codec. It will block until the codec is closed.
|
||||
//
|
||||
// This server will:
|
||||
// 1. allow for asynchronous and parallel request execution
|
||||
// 2. supports notifications (pub/sub)
|
||||
// 3. supports request batches
|
||||
func (s *Server) ServeCodec(codec ServerCodec) { |
||||
defer func() { |
||||
if err := recover(); err != nil { |
||||
const size = 64 << 10 |
||||
buf := make([]byte, size) |
||||
buf = buf[:runtime.Stack(buf, false)] |
||||
glog.Errorln(string(buf)) |
||||
} |
||||
codec.Close() |
||||
}() |
||||
|
||||
for { |
||||
reqs, batch, err := s.readRequest(codec) |
||||
if err != nil { |
||||
glog.V(logger.Debug).Infof("%v\n", err) |
||||
codec.Write(codec.CreateErrorResponse(nil, err)) |
||||
break |
||||
} |
||||
|
||||
if batch { |
||||
go s.execBatch(codec, reqs) |
||||
} else { |
||||
go s.exec(codec, reqs[0]) |
||||
} |
||||
} |
||||
} |
||||
|
||||
// sendNotification will create a notification from the given event by serializing member fields of the event.
|
||||
// It will then send the notification to the client, when it fails the codec is closed. When the event has multiple
|
||||
// fields an array of values is returned.
|
||||
func sendNotification(codec ServerCodec, subid string, event interface{}) { |
||||
notification := codec.CreateNotification(subid, event) |
||||
|
||||
if err := codec.Write(notification); err != nil { |
||||
codec.Close() |
||||
} |
||||
} |
||||
|
||||
// createSubscription will register a new subscription and waits for raised events. When an event is raised it will:
|
||||
// 1. test if the event is raised matches the criteria the user has (optionally) specified
|
||||
// 2. create a notification of the event and send it the client when it matches the criteria
|
||||
// It will unsubscribe the subscription when the socket is closed or the subscription is unsubscribed by the user.
|
||||
func (s *Server) createSubscription(c ServerCodec, req *serverRequest) (string, error) { |
||||
args := []reflect.Value{req.callb.rcvr} |
||||
if len(req.args) > 0 { |
||||
args = append(args, req.args...) |
||||
} |
||||
|
||||
subid, err := newSubscriptionId() |
||||
if err != nil { |
||||
return "", err |
||||
} |
||||
|
||||
reply := req.callb.method.Func.Call(args) |
||||
|
||||
if reply[1].IsNil() { // no error
|
||||
if subscription, ok := reply[0].Interface().(Subscription); ok { |
||||
s.muSubcriptions.Lock() |
||||
s.subscriptions[subid] = subscription |
||||
s.muSubcriptions.Unlock() |
||||
go func() { |
||||
cases := []reflect.SelectCase{ |
||||
reflect.SelectCase{Dir: reflect.SelectRecv, Chan: reflect.ValueOf(subscription.Chan())}, // new event
|
||||
reflect.SelectCase{Dir: reflect.SelectRecv, Chan: reflect.ValueOf(c.Closed())}, // connection closed
|
||||
} |
||||
|
||||
for { |
||||
idx, notification, recvOk := reflect.Select(cases) |
||||
switch idx { |
||||
case 0: // new event, or channel closed
|
||||
if recvOk { // send notification
|
||||
if event, ok := notification.Interface().(*event.Event); ok { |
||||
if subscription.match == nil || subscription.match(event.Data) { |
||||
sendNotification(c, subid, subscription.format(event.Data)) |
||||
} |
||||
} |
||||
} else { // user send an eth_unsubscribe request
|
||||
return |
||||
} |
||||
case 1: // connection closed
|
||||
s.unsubscribe(subid) |
||||
return |
||||
} |
||||
} |
||||
}() |
||||
} else { // unable to create subscription
|
||||
s.muSubcriptions.Lock() |
||||
delete(s.subscriptions, subid) |
||||
s.muSubcriptions.Unlock() |
||||
} |
||||
} else { |
||||
return "", fmt.Errorf("Unable to create subscription") |
||||
} |
||||
|
||||
return subid, nil |
||||
} |
||||
|
||||
// unsubscribe calls the Unsubscribe method on the subscription and removes a subscription from the subscription
|
||||
// registry.
|
||||
func (s *Server) unsubscribe(subid string) bool { |
||||
s.muSubcriptions.Lock() |
||||
defer s.muSubcriptions.Unlock() |
||||
if sub, ok := s.subscriptions[subid]; ok { |
||||
sub.Unsubscribe() |
||||
delete(s.subscriptions, subid) |
||||
return true |
||||
} |
||||
return false |
||||
} |
||||
|
||||
// handle executes a request and returns the response from the callback.
|
||||
func (s *Server) handle(codec ServerCodec, req *serverRequest) interface{} { |
||||
if req.err != nil { |
||||
return codec.CreateErrorResponse(&req.id, req.err) |
||||
} |
||||
|
||||
if req.isUnsubscribe { // first param must be the subscription id
|
||||
if len(req.args) >= 1 && req.args[0].Kind() == reflect.String { |
||||
subid := req.args[0].String() |
||||
if s.unsubscribe(subid) { |
||||
return codec.CreateResponse(req.id, true) |
||||
} else { |
||||
return codec.CreateErrorResponse(&req.id, |
||||
&callbackError{fmt.Sprintf("subscription '%s' not found", subid)}) |
||||
} |
||||
} |
||||
return codec.CreateErrorResponse(&req.id, &invalidParamsError{"Expected subscription id as argument"}) |
||||
} |
||||
|
||||
if req.callb.isSubscribe { |
||||
subid, err := s.createSubscription(codec, req) |
||||
if err != nil { |
||||
return codec.CreateErrorResponse(&req.id, &callbackError{err.Error()}) |
||||
} |
||||
return codec.CreateResponse(req.id, subid) |
||||
} |
||||
|
||||
// regular RPC call
|
||||
if len(req.args) != len(req.callb.argTypes) { |
||||
rpcErr := &invalidParamsError{fmt.Sprintf("%s%s%s expects %d parameters, got %d", |
||||
req.svcname, serviceMethodSeparator, req.callb.method.Name, |
||||
len(req.callb.argTypes), len(req.args))} |
||||
return codec.CreateErrorResponse(&req.id, rpcErr) |
||||
} |
||||
|
||||
arguments := []reflect.Value{req.callb.rcvr} |
||||
if len(req.args) > 0 { |
||||
arguments = append(arguments, req.args...) |
||||
} |
||||
|
||||
reply := req.callb.method.Func.Call(arguments) |
||||
|
||||
if len(reply) == 0 { |
||||
return codec.CreateResponse(req.id, nil) |
||||
} |
||||
|
||||
if req.callb.errPos >= 0 { // test if method returned an error
|
||||
if !reply[req.callb.errPos].IsNil() { |
||||
e := reply[req.callb.errPos].Interface().(error) |
||||
res := codec.CreateErrorResponse(&req.id, &callbackError{e.Error()}) |
||||
return res |
||||
} |
||||
} |
||||
|
||||
return codec.CreateResponse(req.id, reply[0].Interface()) |
||||
} |
||||
|
||||
// exec executes the given request and writes the result back using the codec.
|
||||
func (s *Server) exec(codec ServerCodec, req *serverRequest) { |
||||
var response interface{} |
||||
if req.err != nil { |
||||
response = codec.CreateErrorResponse(&req.id, req.err) |
||||
} else { |
||||
response = s.handle(codec, req) |
||||
} |
||||
|
||||
if err := codec.Write(response); err != nil { |
||||
glog.V(logger.Error).Infof("%v\n", err) |
||||
codec.Close() |
||||
} |
||||
} |
||||
|
||||
// execBatch executes the given requests and writes the result back using the codec. It will only write the response
|
||||
// back when the last request is processed.
|
||||
func (s *Server) execBatch(codec ServerCodec, requests []*serverRequest) { |
||||
responses := make([]interface{}, len(requests)) |
||||
for i, req := range requests { |
||||
if req.err != nil { |
||||
responses[i] = codec.CreateErrorResponse(&req.id, req.err) |
||||
} else { |
||||
responses[i] = s.handle(codec, req) |
||||
} |
||||
} |
||||
|
||||
if err := codec.Write(responses); err != nil { |
||||
glog.V(logger.Error).Infof("%v\n", err) |
||||
codec.Close() |
||||
} |
||||
} |
||||
|
||||
// readRequest requests the next (batch) request from the codec. It will return the collection of requests, an
|
||||
// indication if the request was a batch, the invalid request identifier and an error when the request could not be
|
||||
// read/parsed.
|
||||
func (s *Server) readRequest(codec ServerCodec) ([]*serverRequest, bool, RPCError) { |
||||
reqs, batch, err := codec.ReadRequestHeaders() |
||||
if err != nil { |
||||
return nil, batch, err |
||||
} |
||||
|
||||
requests := make([]*serverRequest, len(reqs)) |
||||
|
||||
// verify requests
|
||||
for i, r := range reqs { |
||||
var ok bool |
||||
var svc *service |
||||
|
||||
if r.isPubSub && r.method == unsubscribeMethod { |
||||
requests[i] = &serverRequest{id: r.id, isUnsubscribe: true} |
||||
argTypes := []reflect.Type{reflect.TypeOf("")} |
||||
if args, err := codec.ParseRequestArguments(argTypes, r.params); err == nil { |
||||
requests[i].args = args |
||||
} else { |
||||
requests[i].err = &invalidParamsError{err.Error()} |
||||
} |
||||
continue |
||||
} |
||||
|
||||
if svc, ok = s.services[r.service]; !ok { |
||||
requests[i] = &serverRequest{id: r.id, err: &methodNotFoundError{r.service, r.method}} |
||||
continue |
||||
} |
||||
|
||||
if r.isPubSub { // eth_subscribe
|
||||
if callb, ok := svc.subscriptions[r.method]; ok { |
||||
requests[i] = &serverRequest{id: r.id, svcname: svc.name, callb: callb} |
||||
if r.params != nil && len(callb.argTypes) > 0 { |
||||
argTypes := []reflect.Type{reflect.TypeOf("")} |
||||
argTypes = append(argTypes, callb.argTypes...) |
||||
if args, err := codec.ParseRequestArguments(argTypes, r.params); err == nil { |
||||
requests[i].args = args[1:] // first one is service.method name which isn't an actual argument
|
||||
} else { |
||||
requests[i].err = &invalidParamsError{err.Error()} |
||||
} |
||||
} |
||||
} else { |
||||
requests[i] = &serverRequest{id: r.id, err: &methodNotFoundError{subscribeMethod, r.method}} |
||||
} |
||||
continue |
||||
} |
||||
|
||||
if callb, ok := svc.callbacks[r.method]; ok { |
||||
requests[i] = &serverRequest{id: r.id, svcname: svc.name, callb: callb} |
||||
if r.params != nil && len(callb.argTypes) > 0 { |
||||
if args, err := codec.ParseRequestArguments(callb.argTypes, r.params); err == nil { |
||||
requests[i].args = args |
||||
} else { |
||||
requests[i].err = &invalidParamsError{err.Error()} |
||||
} |
||||
} |
||||
continue |
||||
} |
||||
|
||||
requests[i] = &serverRequest{id: r.id, err: &methodNotFoundError{r.service, r.method}} |
||||
} |
||||
|
||||
return requests, batch, nil |
||||
} |
||||
@ -0,0 +1,219 @@ |
||||
package v2 |
||||
|
||||
import ( |
||||
"encoding/json" |
||||
"fmt" |
||||
"reflect" |
||||
"testing" |
||||
"time" |
||||
) |
||||
|
||||
type Service struct{} |
||||
|
||||
type Args struct { |
||||
S string |
||||
} |
||||
|
||||
func (s *Service) NoArgsRets() { |
||||
} |
||||
|
||||
type Result struct { |
||||
String string |
||||
Int int |
||||
Args *Args |
||||
} |
||||
|
||||
func (s *Service) Echo(str string, i int, args *Args) Result { |
||||
return Result{str, i, args} |
||||
} |
||||
|
||||
func (s *Service) Rets() (string, error) { |
||||
return "", nil |
||||
} |
||||
|
||||
func (s *Service) InvalidRets1() (error, string) { |
||||
return nil, "" |
||||
} |
||||
|
||||
func (s *Service) InvalidRets2() (string, string) { |
||||
return "", "" |
||||
} |
||||
|
||||
func (s *Service) InvalidRets3() (string, string, error) { |
||||
return "", "", nil |
||||
} |
||||
|
||||
func (s *Service) Subscription() (Subscription, error) { |
||||
return NewSubscription(nil), nil |
||||
} |
||||
|
||||
func TestServerRegisterName(t *testing.T) { |
||||
server := NewServer() |
||||
service := new(Service) |
||||
|
||||
if err := server.RegisterName("calc", service); err != nil { |
||||
t.Fatalf("%v", err) |
||||
} |
||||
|
||||
if len(server.services) != 2 { |
||||
t.Fatalf("Expected 2 service entries, got %d", len(server.services)) |
||||
} |
||||
|
||||
svc, ok := server.services["calc"] |
||||
if !ok { |
||||
t.Fatalf("Expected service calc to be registered") |
||||
} |
||||
|
||||
if len(svc.callbacks) != 3 { |
||||
t.Errorf("Expected 3 callbacks for service 'calc', got %d", len(svc.callbacks)) |
||||
} |
||||
|
||||
if len(svc.subscriptions) != 1 { |
||||
t.Errorf("Expected 1 subscription for service 'calc', got %d", len(svc.subscriptions)) |
||||
} |
||||
} |
||||
|
||||
// dummy codec used for testing RPC method execution
|
||||
type ServerTestCodec struct { |
||||
counter int |
||||
input []byte |
||||
output string |
||||
closer chan interface{} |
||||
} |
||||
|
||||
func (c *ServerTestCodec) ReadRequestHeaders() ([]rpcRequest, bool, RPCError) { |
||||
c.counter += 1 |
||||
|
||||
if c.counter == 1 { |
||||
var req jsonRequest |
||||
json.Unmarshal(c.input, &req) |
||||
return []rpcRequest{rpcRequest{id: *req.Id, isPubSub: false, service: "test", method: req.Method, params: req.Payload}}, false, nil |
||||
} |
||||
|
||||
// requests are executes in parallel, wait a bit before returning an error so that the previous request has time to
|
||||
// be executed
|
||||
timer := time.NewTimer(time.Duration(2) * time.Second) |
||||
<-timer.C |
||||
|
||||
return nil, false, &invalidRequestError{"connection closed"} |
||||
} |
||||
|
||||
func (c *ServerTestCodec) ParseRequestArguments(argTypes []reflect.Type, payload interface{}) ([]reflect.Value, RPCError) { |
||||
|
||||
args, _ := payload.(json.RawMessage) |
||||
|
||||
argValues := make([]reflect.Value, len(argTypes)) |
||||
params := make([]interface{}, len(argTypes)) |
||||
|
||||
n, err := countArguments(args) |
||||
if err != nil { |
||||
return nil, &invalidParamsError{err.Error()} |
||||
} |
||||
if n != len(argTypes) { |
||||
return nil, &invalidParamsError{fmt.Sprintf("insufficient params, want %d have %d", len(argTypes), n)} |
||||
|
||||
} |
||||
|
||||
for i, t := range argTypes { |
||||
if t.Kind() == reflect.Ptr { |
||||
// values must be pointers for the Unmarshal method, reflect.
|
||||
// Dereference otherwise reflect.New would create **SomeType
|
||||
argValues[i] = reflect.New(t.Elem()) |
||||
params[i] = argValues[i].Interface() |
||||
|
||||
// when not specified blockNumbers are by default latest (-1)
|
||||
if blockNumber, ok := params[i].(*BlockNumber); ok { |
||||
*blockNumber = BlockNumber(-1) |
||||
} |
||||
} else { |
||||
argValues[i] = reflect.New(t) |
||||
params[i] = argValues[i].Interface() |
||||
|
||||
// when not specified blockNumbers are by default latest (-1)
|
||||
if blockNumber, ok := params[i].(*BlockNumber); ok { |
||||
*blockNumber = BlockNumber(-1) |
||||
} |
||||
} |
||||
} |
||||
|
||||
if err := json.Unmarshal(args, ¶ms); err != nil { |
||||
return nil, &invalidParamsError{err.Error()} |
||||
} |
||||
|
||||
// Convert pointers back to values where necessary
|
||||
for i, a := range argValues { |
||||
if a.Kind() != argTypes[i].Kind() { |
||||
argValues[i] = reflect.Indirect(argValues[i]) |
||||
} |
||||
} |
||||
|
||||
return argValues, nil |
||||
} |
||||
|
||||
func (c *ServerTestCodec) CreateResponse(id int64, reply interface{}) interface{} { |
||||
return &jsonSuccessResponse{Version: jsonRPCVersion, Id: id, Result: reply} |
||||
} |
||||
|
||||
func (c *ServerTestCodec) CreateErrorResponse(id *int64, err RPCError) interface{} { |
||||
return &jsonErrResponse{Version: jsonRPCVersion, Id: id, Error: jsonError{Code: err.Code(), Message: err.Error()}} |
||||
} |
||||
|
||||
func (c *ServerTestCodec) CreateErrorResponseWithInfo(id *int64, err RPCError, info interface{}) interface{} { |
||||
return &jsonErrResponse{Version: jsonRPCVersion, Id: id, |
||||
Error: jsonError{Code: err.Code(), Message: err.Error(), Data: info}} |
||||
} |
||||
|
||||
func (c *ServerTestCodec) CreateNotification(subid string, event interface{}) interface{} { |
||||
return &jsonNotification{Version: jsonRPCVersion, Method: notificationMethod, |
||||
Params: jsonSubscription{Subscription: subid, Result: event}} |
||||
} |
||||
|
||||
func (c *ServerTestCodec) Write(msg interface{}) error { |
||||
if len(c.output) == 0 { // only capture first response
|
||||
if o, err := json.Marshal(msg); err != nil { |
||||
return err |
||||
} else { |
||||
c.output = string(o) |
||||
} |
||||
} |
||||
|
||||
return nil |
||||
} |
||||
|
||||
func (c *ServerTestCodec) Close() { |
||||
close(c.closer) |
||||
} |
||||
|
||||
func (c *ServerTestCodec) Closed() <-chan interface{} { |
||||
return c.closer |
||||
} |
||||
|
||||
func TestServerMethodExecution(t *testing.T) { |
||||
server := NewServer() |
||||
service := new(Service) |
||||
|
||||
if err := server.RegisterName("test", service); err != nil { |
||||
t.Fatalf("%v", err) |
||||
} |
||||
|
||||
id := int64(12345) |
||||
req := jsonRequest{ |
||||
Method: "echo", |
||||
Version: "2.0", |
||||
Id: &id, |
||||
} |
||||
args := []interface{}{"string arg", 1122, &Args{"qwerty"}} |
||||
req.Payload, _ = json.Marshal(&args) |
||||
|
||||
input, _ := json.Marshal(&req) |
||||
codec := &ServerTestCodec{input: input, closer: make(chan interface{})} |
||||
go server.ServeCodec(codec) |
||||
|
||||
<-codec.closer |
||||
|
||||
expected := `{"jsonrpc":"2.0","id":12345,"result":{"String":"string arg","Int":1122,"Args":{"S":"qwerty"}}}` |
||||
|
||||
if expected != codec.output { |
||||
t.Fatalf("expected %s, got %s\n", expected, codec.output) |
||||
} |
||||
} |
||||
@ -0,0 +1,352 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package v2 |
||||
|
||||
import ( |
||||
"fmt" |
||||
"math" |
||||
"math/big" |
||||
"reflect" |
||||
"strings" |
||||
|
||||
"sync" |
||||
|
||||
"github.com/ethereum/go-ethereum/event" |
||||
) |
||||
|
||||
// API describes the set of methods offered over the RPC interface
|
||||
type API struct { |
||||
Namespace string // namespace under which the rpc methods of Service are exposed
|
||||
Version string // api version for DApp's
|
||||
Service interface{} // receiver instance which holds the methods
|
||||
Public bool // indication if the methods must be considered safe for public use
|
||||
} |
||||
|
||||
// callback is a method callback which was registered in the server
|
||||
type callback struct { |
||||
rcvr reflect.Value // receiver of method
|
||||
method reflect.Method // callback
|
||||
argTypes []reflect.Type // input argument types
|
||||
errPos int // err return idx, of -1 when method cannot return error
|
||||
isSubscribe bool // indication if the callback is a subscription
|
||||
} |
||||
|
||||
// service represents a registered object
|
||||
type service struct { |
||||
name string // name for service
|
||||
rcvr reflect.Value // receiver of methods for the service
|
||||
typ reflect.Type // receiver type
|
||||
callbacks callbacks // registered handlers
|
||||
subscriptions subscriptions // available subscriptions/notifications
|
||||
} |
||||
|
||||
// serverRequest is an incoming request
|
||||
type serverRequest struct { |
||||
id int64 |
||||
svcname string |
||||
rcvr reflect.Value |
||||
callb *callback |
||||
args []reflect.Value |
||||
isUnsubscribe bool |
||||
err RPCError |
||||
} |
||||
|
||||
type serviceRegistry map[string]*service // collection of services
|
||||
type callbacks map[string]*callback // collection of RPC callbacks
|
||||
type subscriptions map[string]*callback // collection of subscription callbacks
|
||||
type subscriptionRegistry map[string]Subscription // collection of subscriptions
|
||||
|
||||
// Server represents a RPC server
|
||||
type Server struct { |
||||
services serviceRegistry |
||||
muSubcriptions sync.Mutex // protects subscriptions
|
||||
subscriptions subscriptionRegistry |
||||
} |
||||
|
||||
// rpcRequest represents a raw incoming RPC request
|
||||
type rpcRequest struct { |
||||
service string |
||||
method string |
||||
id int64 |
||||
isPubSub bool |
||||
params interface{} |
||||
} |
||||
|
||||
// RPCError implements RPC error, is add support for error codec over regular go errors
|
||||
type RPCError interface { |
||||
// RPC error code
|
||||
Code() int |
||||
// Error message
|
||||
Error() string |
||||
} |
||||
|
||||
// ServerCodec implements reading, parsing and writing RPC messages for the server side of
|
||||
// a RPC session. Implementations must be go-routine safe since the codec can be called in
|
||||
// multiple go-routines concurrently.
|
||||
type ServerCodec interface { |
||||
// Read next request
|
||||
ReadRequestHeaders() ([]rpcRequest, bool, RPCError) |
||||
// Parse request argument to the given types
|
||||
ParseRequestArguments([]reflect.Type, interface{}) ([]reflect.Value, RPCError) |
||||
// Assemble success response
|
||||
CreateResponse(int64, interface{}) interface{} |
||||
// Assemble error response
|
||||
CreateErrorResponse(*int64, RPCError) interface{} |
||||
// Assemble error response with extra information about the error through info
|
||||
CreateErrorResponseWithInfo(id *int64, err RPCError, info interface{}) interface{} |
||||
// Create notification response
|
||||
CreateNotification(string, interface{}) interface{} |
||||
// Write msg to client.
|
||||
Write(interface{}) error |
||||
// Close underlying data stream
|
||||
Close() |
||||
// Closed when underlying connection is closed
|
||||
Closed() <-chan interface{} |
||||
} |
||||
|
||||
// SubscriptionMatcher returns true if the given value matches the criteria specified by the user
|
||||
type SubscriptionMatcher func(interface{}) bool |
||||
|
||||
// SubscriptionOutputFormat accepts event data and has the ability to format the data before it is send to the client
|
||||
type SubscriptionOutputFormat func(interface{}) interface{} |
||||
|
||||
// defaultSubscriptionOutputFormatter returns data and is used as default output format for notifications
|
||||
func defaultSubscriptionOutputFormatter(data interface{}) interface{} { |
||||
return data |
||||
} |
||||
|
||||
// Subscription is used by the server to send notifications to the client
|
||||
type Subscription struct { |
||||
sub event.Subscription |
||||
match SubscriptionMatcher |
||||
format SubscriptionOutputFormat |
||||
} |
||||
|
||||
// NewSubscription create a new RPC subscription
|
||||
func NewSubscription(sub event.Subscription) Subscription { |
||||
return Subscription{sub, nil, defaultSubscriptionOutputFormatter} |
||||
} |
||||
|
||||
// NewSubscriptionWithOutputFormat create a new RPC subscription which a custom notification output format
|
||||
func NewSubscriptionWithOutputFormat(sub event.Subscription, formatter SubscriptionOutputFormat) Subscription { |
||||
return Subscription{sub, nil, formatter} |
||||
} |
||||
|
||||
// NewSubscriptionFiltered will create a new subscription. For each raised event the given matcher is
|
||||
// called. If it returns true the event is send as notification to the client, otherwise it is ignored.
|
||||
func NewSubscriptionFiltered(sub event.Subscription, match SubscriptionMatcher) Subscription { |
||||
return Subscription{sub, match, defaultSubscriptionOutputFormatter} |
||||
} |
||||
|
||||
// Chan returns the channel where new events will be published. It's up the user to call the matcher to
|
||||
// determine if the events are interesting for the client.
|
||||
func (s *Subscription) Chan() <-chan *event.Event { |
||||
return s.sub.Chan() |
||||
} |
||||
|
||||
// Unsubscribe will end the subscription and closes the event channel
|
||||
func (s *Subscription) Unsubscribe() { |
||||
s.sub.Unsubscribe() |
||||
} |
||||
|
||||
// HexNumber serializes a number to hex format using the "%#x" format
|
||||
type HexNumber big.Int |
||||
|
||||
// NewHexNumber creates a new hex number instance which will serialize the given val with `%#x` on marshal.
|
||||
func NewHexNumber(val interface{}) *HexNumber { |
||||
if val == nil { |
||||
return nil |
||||
} |
||||
|
||||
if v, ok := val.(*big.Int); ok && v != nil { |
||||
hn := new(big.Int).Set(v) |
||||
return (*HexNumber)(hn) |
||||
} |
||||
|
||||
rval := reflect.ValueOf(val) |
||||
|
||||
var unsigned uint64 |
||||
utype := reflect.TypeOf(unsigned) |
||||
if t := rval.Type(); t.ConvertibleTo(utype) { |
||||
hn := new(big.Int).SetUint64(rval.Convert(utype).Uint()) |
||||
return (*HexNumber)(hn) |
||||
} |
||||
|
||||
var signed int64 |
||||
stype := reflect.TypeOf(signed) |
||||
if t := rval.Type(); t.ConvertibleTo(stype) { |
||||
hn := new(big.Int).SetInt64(rval.Convert(stype).Int()) |
||||
return (*HexNumber)(hn) |
||||
} |
||||
|
||||
return nil |
||||
} |
||||
|
||||
func (h *HexNumber) UnmarshalJSON(input []byte) error { |
||||
length := len(input) |
||||
if length >= 2 && input[0] == '"' && input[length-1] == '"' { |
||||
input = input[1 : length-1] |
||||
} |
||||
|
||||
hn := (*big.Int)(h) |
||||
if _, ok := hn.SetString(string(input), 0); ok { |
||||
return nil |
||||
} |
||||
|
||||
return fmt.Errorf("Unable to parse number") |
||||
} |
||||
|
||||
// MarshalJSON serialize the hex number instance to a hex representation.
|
||||
func (h *HexNumber) MarshalJSON() ([]byte, error) { |
||||
if h != nil { |
||||
hn := (*big.Int)(h) |
||||
if hn.BitLen() == 0 { |
||||
return []byte(`"0x0"`), nil |
||||
} |
||||
return []byte(fmt.Sprintf(`"0x%x"`, hn)), nil |
||||
} |
||||
return nil, nil |
||||
} |
||||
|
||||
func (h *HexNumber) Int() int { |
||||
hn := (*big.Int)(h) |
||||
return int(hn.Int64()) |
||||
} |
||||
|
||||
func (h *HexNumber) Int64() int64 { |
||||
hn := (*big.Int)(h) |
||||
return hn.Int64() |
||||
} |
||||
|
||||
func (h *HexNumber) Uint() uint { |
||||
hn := (*big.Int)(h) |
||||
return uint(hn.Uint64()) |
||||
} |
||||
|
||||
func (h *HexNumber) Uint64() uint64 { |
||||
hn := (*big.Int)(h) |
||||
return hn.Uint64() |
||||
} |
||||
|
||||
func (h *HexNumber) BigInt() *big.Int { |
||||
return (*big.Int)(h) |
||||
} |
||||
|
||||
type Number int64 |
||||
|
||||
func (n *Number) UnmarshalJSON(data []byte) error { |
||||
input := strings.TrimSpace(string(data)) |
||||
|
||||
if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' { |
||||
input = input[1 : len(input)-1] |
||||
} |
||||
|
||||
if len(input) == 0 { |
||||
*n = Number(latestBlockNumber.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
in := new(big.Int) |
||||
_, ok := in.SetString(input, 0) |
||||
|
||||
if !ok { // test if user supplied string tag
|
||||
return fmt.Errorf(`invalid number %s`, data) |
||||
} |
||||
|
||||
if in.Cmp(earliestBlockNumber) >= 0 && in.Cmp(maxBlockNumber) <= 0 { |
||||
*n = Number(in.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
return fmt.Errorf("blocknumber not in range [%d, %d]", earliestBlockNumber, maxBlockNumber) |
||||
} |
||||
|
||||
func (n *Number) Int64() int64 { |
||||
return *(*int64)(n) |
||||
} |
||||
|
||||
func (n *Number) BigInt() *big.Int { |
||||
return big.NewInt(n.Int64()) |
||||
} |
||||
|
||||
var ( |
||||
pendingBlockNumber = big.NewInt(-2) |
||||
latestBlockNumber = big.NewInt(-1) |
||||
earliestBlockNumber = big.NewInt(0) |
||||
maxBlockNumber = big.NewInt(math.MaxInt64) |
||||
) |
||||
|
||||
type BlockNumber int64 |
||||
|
||||
const ( |
||||
PendingBlockNumber = BlockNumber(-2) |
||||
LatestBlockNumber = BlockNumber(-1) |
||||
) |
||||
|
||||
// UnmarshalJSON parses the given JSON fragement into a BlockNumber. It supports:
|
||||
// - "latest" or "earliest" as string arguments
|
||||
// - the block number
|
||||
// Returned errors:
|
||||
// - an unsupported error when "pending" is specified (not yet implemented)
|
||||
// - an invalid block number error when the given argument isn't a known strings
|
||||
// - an out of range error when the given block number is either too little or too large
|
||||
func (bn *BlockNumber) UnmarshalJSON(data []byte) error { |
||||
input := strings.TrimSpace(string(data)) |
||||
|
||||
if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' { |
||||
input = input[1 : len(input)-1] |
||||
} |
||||
|
||||
if len(input) == 0 { |
||||
*bn = BlockNumber(latestBlockNumber.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
in := new(big.Int) |
||||
_, ok := in.SetString(input, 0) |
||||
|
||||
if !ok { // test if user supplied string tag
|
||||
strBlockNumber := input |
||||
if strBlockNumber == "latest" { |
||||
*bn = BlockNumber(latestBlockNumber.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
if strBlockNumber == "earliest" { |
||||
*bn = BlockNumber(earliestBlockNumber.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
if strBlockNumber == "pending" { |
||||
*bn = BlockNumber(pendingBlockNumber.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
return fmt.Errorf(`invalid blocknumber %s`, data) |
||||
} |
||||
|
||||
if in.Cmp(earliestBlockNumber) >= 0 && in.Cmp(maxBlockNumber) <= 0 { |
||||
*bn = BlockNumber(in.Int64()) |
||||
return nil |
||||
} |
||||
|
||||
return fmt.Errorf("blocknumber not in range [%d, %d]", earliestBlockNumber, maxBlockNumber) |
||||
} |
||||
|
||||
func (bn *BlockNumber) Int64() int64 { |
||||
return (int64)(*bn) |
||||
} |
||||
@ -0,0 +1,57 @@ |
||||
package v2 |
||||
|
||||
import ( |
||||
"bytes" |
||||
"encoding/json" |
||||
"math/big" |
||||
"testing" |
||||
) |
||||
|
||||
func TestNewHexNumber(t *testing.T) { |
||||
tests := []interface{}{big.NewInt(123), int64(123), uint64(123), int8(123), uint8(123)} |
||||
|
||||
for i, v := range tests { |
||||
hn := NewHexNumber(v) |
||||
if hn == nil { |
||||
t.Fatalf("Unable to create hex number instance for tests[%d]", i) |
||||
} |
||||
if hn.Int64() != 123 { |
||||
t.Fatalf("expected %d, got %d on value tests[%d]", 123, hn.Int64(), i) |
||||
} |
||||
} |
||||
|
||||
failures := []interface{}{"", nil, []byte{1, 2, 3, 4}} |
||||
for i, v := range failures { |
||||
hn := NewHexNumber(v) |
||||
if hn != nil { |
||||
t.Fatalf("Creating a nex number instance of %T should fail (failures[%d])", failures[i], i) |
||||
} |
||||
} |
||||
} |
||||
|
||||
func TestHexNumberUnmarshalJSON(t *testing.T) { |
||||
tests := []string{`"0x4d2"`, "1234", `"1234"`} |
||||
for i, v := range tests { |
||||
var hn HexNumber |
||||
if err := json.Unmarshal([]byte(v), &hn); err != nil { |
||||
t.Fatalf("Test %d failed - %s", i, err) |
||||
} |
||||
|
||||
if hn.Int64() != 1234 { |
||||
t.Fatalf("Expected %d, got %d for test[%d]", 1234, hn.Int64(), i) |
||||
} |
||||
} |
||||
} |
||||
|
||||
func TestHexNumberMarshalJSON(t *testing.T) { |
||||
hn := NewHexNumber(1234567890) |
||||
got, err := json.Marshal(hn) |
||||
if err != nil { |
||||
t.Fatalf("Unable to marshal hex number - %s", err) |
||||
} |
||||
|
||||
exp := []byte(`"0x499602d2"`) |
||||
if bytes.Compare(exp, got) != 0 { |
||||
t.Fatalf("Invalid json.Marshal, expected '%s', got '%s'", exp, got) |
||||
} |
||||
} |
||||
@ -0,0 +1,205 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of the go-ethereum library.
|
||||
//
|
||||
// The go-ethereum library is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU Lesser General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// The go-ethereum library is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public License
|
||||
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package v2 |
||||
|
||||
import ( |
||||
"crypto/rand" |
||||
"encoding/hex" |
||||
"errors" |
||||
"math/big" |
||||
"reflect" |
||||
"unicode" |
||||
"unicode/utf8" |
||||
) |
||||
|
||||
// Is this an exported - upper case - name?
|
||||
func isExported(name string) bool { |
||||
rune, _ := utf8.DecodeRuneInString(name) |
||||
return unicode.IsUpper(rune) |
||||
} |
||||
|
||||
// Is this type exported or a builtin?
|
||||
func isExportedOrBuiltinType(t reflect.Type) bool { |
||||
for t.Kind() == reflect.Ptr { |
||||
t = t.Elem() |
||||
} |
||||
// PkgPath will be non-empty even for an exported type,
|
||||
// so we need to check the type name as well.
|
||||
return isExported(t.Name()) || t.PkgPath() == "" |
||||
} |
||||
|
||||
var errorType = reflect.TypeOf((*error)(nil)).Elem() |
||||
|
||||
// Implements this type the error interface
|
||||
func isErrorType(t reflect.Type) bool { |
||||
for t.Kind() == reflect.Ptr { |
||||
t = t.Elem() |
||||
} |
||||
return t.Implements(errorType) |
||||
} |
||||
|
||||
var subscriptionType = reflect.TypeOf((*Subscription)(nil)).Elem() |
||||
|
||||
func isSubscriptionType(t reflect.Type) bool { |
||||
for t.Kind() == reflect.Ptr { |
||||
t = t.Elem() |
||||
} |
||||
return t == subscriptionType |
||||
} |
||||
|
||||
// isPubSub tests whether the given method return the pair (v2.Subscription, error)
|
||||
func isPubSub(methodType reflect.Type) bool { |
||||
if methodType.NumOut() != 2 { |
||||
return false |
||||
} |
||||
return isSubscriptionType(methodType.Out(0)) && isErrorType(methodType.Out(1)) |
||||
} |
||||
|
||||
// formatName will convert to first character to lower case
|
||||
func formatName(name string) string { |
||||
ret := []rune(name) |
||||
if len(ret) > 0 { |
||||
ret[0] = unicode.ToLower(ret[0]) |
||||
} |
||||
return string(ret) |
||||
} |
||||
|
||||
var bigIntType = reflect.TypeOf((*big.Int)(nil)).Elem() |
||||
|
||||
// Indication if this type should be serialized in hex
|
||||
func isHexNum(t reflect.Type) bool { |
||||
if t == nil { |
||||
return false |
||||
} |
||||
for t.Kind() == reflect.Ptr { |
||||
t = t.Elem() |
||||
} |
||||
|
||||
return t == bigIntType |
||||
} |
||||
|
||||
var blockNumberType = reflect.TypeOf((*BlockNumber)(nil)).Elem() |
||||
|
||||
// Indication if the given block is a BlockNumber
|
||||
func isBlockNumber(t reflect.Type) bool { |
||||
if t == nil { |
||||
return false |
||||
} |
||||
|
||||
for t.Kind() == reflect.Ptr { |
||||
t = t.Elem() |
||||
} |
||||
|
||||
return t == blockNumberType |
||||
} |
||||
|
||||
// suitableCallbacks iterates over the methods of the given type. It will determine if a method satisfies the criteria
|
||||
// for a RPC callback or a subscription callback and adds it to the collection of callbacks or subscriptions. See server
|
||||
// documentation for a summary of these criteria.
|
||||
func suitableCallbacks(rcvr reflect.Value, typ reflect.Type) (callbacks, subscriptions) { |
||||
callbacks := make(callbacks) |
||||
subscriptions := make(subscriptions) |
||||
|
||||
METHODS: |
||||
for m := 0; m < typ.NumMethod(); m++ { |
||||
method := typ.Method(m) |
||||
mtype := method.Type |
||||
mname := formatName(method.Name) |
||||
if method.PkgPath != "" { // method must be exported
|
||||
continue |
||||
} |
||||
|
||||
var h callback |
||||
h.isSubscribe = isPubSub(mtype) |
||||
h.rcvr = rcvr |
||||
h.method = method |
||||
h.errPos = -1 |
||||
|
||||
if h.isSubscribe { |
||||
h.argTypes = make([]reflect.Type, mtype.NumIn()-1) // skip rcvr type
|
||||
for i := 1; i < mtype.NumIn(); i++ { |
||||
argType := mtype.In(i) |
||||
if isExportedOrBuiltinType(argType) { |
||||
h.argTypes[i-1] = argType |
||||
} else { |
||||
continue METHODS |
||||
} |
||||
} |
||||
|
||||
subscriptions[mname] = &h |
||||
continue METHODS |
||||
} |
||||
|
||||
numIn := mtype.NumIn() |
||||
|
||||
// determine method arguments, ignore first arg since it's the receiver type
|
||||
// Arguments must be exported or builtin types
|
||||
h.argTypes = make([]reflect.Type, numIn-1) |
||||
for i := 1; i < numIn; i++ { |
||||
argType := mtype.In(i) |
||||
if !isExportedOrBuiltinType(argType) { |
||||
continue METHODS |
||||
} |
||||
h.argTypes[i-1] = argType |
||||
} |
||||
|
||||
// check that all returned values are exported or builtin types
|
||||
for i := 0; i < mtype.NumOut(); i++ { |
||||
if !isExportedOrBuiltinType(mtype.Out(i)) { |
||||
continue METHODS |
||||
} |
||||
} |
||||
|
||||
// when a method returns an error it must be the last returned value
|
||||
h.errPos = -1 |
||||
for i := 0; i < mtype.NumOut(); i++ { |
||||
if isErrorType(mtype.Out(i)) { |
||||
h.errPos = i |
||||
break |
||||
} |
||||
} |
||||
|
||||
if h.errPos >= 0 && h.errPos != mtype.NumOut()-1 { |
||||
continue METHODS |
||||
} |
||||
|
||||
switch mtype.NumOut() { |
||||
case 0, 1: |
||||
break |
||||
case 2: |
||||
if h.errPos == -1 { // method must one return value and 1 error
|
||||
continue METHODS |
||||
} |
||||
break |
||||
default: |
||||
continue METHODS |
||||
} |
||||
|
||||
callbacks[mname] = &h |
||||
} |
||||
|
||||
return callbacks, subscriptions |
||||
} |
||||
|
||||
func newSubscriptionId() (string, error) { |
||||
var subid [16]byte |
||||
n, _ := rand.Read(subid[:]) |
||||
if n != 16 { |
||||
return "", errors.New("Unable to generate subscription id") |
||||
} |
||||
return "0x" + hex.EncodeToString(subid[:]), nil |
||||
} |
||||
@ -0,0 +1,413 @@ |
||||
// Copyright 2015 The go-ethereum Authors
|
||||
// This file is part of go-ethereum.
|
||||
//
|
||||
// go-ethereum is free software: you can redistribute it and/or modify
|
||||
// it under the terms of the GNU General Public License as published by
|
||||
// the Free Software Foundation, either version 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// go-ethereum is distributed in the hope that it will be useful,
|
||||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
// GNU General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU General Public License
|
||||
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
package whisper |
||||
|
||||
import ( |
||||
"encoding/json" |
||||
"fmt" |
||||
"sync" |
||||
"time" |
||||
|
||||
"github.com/ethereum/go-ethereum/common" |
||||
"github.com/ethereum/go-ethereum/crypto" |
||||
rpc "github.com/ethereum/go-ethereum/rpc/v2" |
||||
) |
||||
|
||||
// PublicWhisperAPI provides the whisper RPC service.
|
||||
type PublicWhisperAPI struct { |
||||
w *Whisper |
||||
|
||||
messagesMu sync.RWMutex |
||||
messages map[int]*whisperFilter |
||||
} |
||||
|
||||
type whisperOfflineError struct{} |
||||
|
||||
func (e *whisperOfflineError) Error() string { |
||||
return "whisper is offline" |
||||
} |
||||
|
||||
// whisperOffLineErr is returned when the node doesn't offer the shh service.
|
||||
var whisperOffLineErr = new(whisperOfflineError) |
||||
|
||||
// NewPublicWhisperAPI create a new RPC whisper service.
|
||||
func NewPublicWhisperAPI(w *Whisper) *PublicWhisperAPI { |
||||
return &PublicWhisperAPI{w: w, messages: make(map[int]*whisperFilter)} |
||||
} |
||||
|
||||
// Version returns the Whisper version this node offers.
|
||||
func (s *PublicWhisperAPI) Version() (*rpc.HexNumber, error) { |
||||
if s.w == nil { |
||||
return rpc.NewHexNumber(0), whisperOffLineErr |
||||
} |
||||
return rpc.NewHexNumber(s.w.Version()), nil |
||||
} |
||||
|
||||
// HasIdentity checks if the the whisper node is configured with the private key
|
||||
// of the specified public pair.
|
||||
func (s *PublicWhisperAPI) HasIdentity(identity string) (bool, error) { |
||||
if s.w == nil { |
||||
return false, whisperOffLineErr |
||||
} |
||||
return s.w.HasIdentity(crypto.ToECDSAPub(common.FromHex(identity))), nil |
||||
} |
||||
|
||||
// NewIdentity generates a new cryptographic identity for the client, and injects
|
||||
// it into the known identities for message decryption.
|
||||
func (s *PublicWhisperAPI) NewIdentity() (string, error) { |
||||
if s.w == nil { |
||||
return "", whisperOffLineErr |
||||
} |
||||
|
||||
identity := s.w.NewIdentity() |
||||
return common.ToHex(crypto.FromECDSAPub(&identity.PublicKey)), nil |
||||
} |
||||
|
||||
type NewFilterArgs struct { |
||||
To string |
||||
From string |
||||
Topics [][][]byte |
||||
} |
||||
|
||||
// NewWhisperFilter creates and registers a new message filter to watch for inbound whisper messages.
|
||||
func (s *PublicWhisperAPI) NewFilter(args *NewFilterArgs) (*rpc.HexNumber, error) { |
||||
if s.w == nil { |
||||
return nil, whisperOffLineErr |
||||
} |
||||
|
||||
var id int |
||||
filter := Filter{ |
||||
To: crypto.ToECDSAPub(common.FromHex(args.To)), |
||||
From: crypto.ToECDSAPub(common.FromHex(args.From)), |
||||
Topics: NewFilterTopics(args.Topics...), |
||||
Fn: func(message *Message) { |
||||
wmsg := NewWhisperMessage(message) |
||||
s.messagesMu.RLock() // Only read lock to the filter pool
|
||||
defer s.messagesMu.RUnlock() |
||||
if s.messages[id] != nil { |
||||
s.messages[id].insert(wmsg) |
||||
} |
||||
}, |
||||
} |
||||
|
||||
id = s.w.Watch(filter) |
||||
|
||||
s.messagesMu.Lock() |
||||
s.messages[id] = newWhisperFilter(id, s.w) |
||||
s.messagesMu.Unlock() |
||||
|
||||
return rpc.NewHexNumber(id), nil |
||||
} |
||||
|
||||
// GetFilterChanges retrieves all the new messages matched by a filter since the last retrieval.
|
||||
func (s *PublicWhisperAPI) GetFilterChanges(filterId rpc.HexNumber) []WhisperMessage { |
||||
s.messagesMu.RLock() |
||||
defer s.messagesMu.RUnlock() |
||||
|
||||
if s.messages[filterId.Int()] != nil { |
||||
if changes := s.messages[filterId.Int()].retrieve(); changes != nil { |
||||
return changes |
||||
} |
||||
} |
||||
return returnWhisperMessages(nil) |
||||
} |
||||
|
||||
// UninstallFilter disables and removes an existing filter.
|
||||
func (s *PublicWhisperAPI) UninstallFilter(filterId rpc.HexNumber) bool { |
||||
s.messagesMu.Lock() |
||||
defer s.messagesMu.Unlock() |
||||
|
||||
if _, ok := s.messages[filterId.Int()]; ok { |
||||
delete(s.messages, filterId.Int()) |
||||
return true |
||||
} |
||||
return false |
||||
} |
||||
|
||||
// GetMessages retrieves all the known messages that match a specific filter.
|
||||
func (s *PublicWhisperAPI) GetMessages(filterId rpc.HexNumber) []WhisperMessage { |
||||
// Retrieve all the cached messages matching a specific, existing filter
|
||||
s.messagesMu.RLock() |
||||
defer s.messagesMu.RUnlock() |
||||
|
||||
var messages []*Message |
||||
if s.messages[filterId.Int()] != nil { |
||||
messages = s.messages[filterId.Int()].messages() |
||||
} |
||||
|
||||
return returnWhisperMessages(messages) |
||||
} |
||||
|
||||
// returnWhisperMessages converts aNhisper message to a RPC whisper message.
|
||||
func returnWhisperMessages(messages []*Message) []WhisperMessage { |
||||
msgs := make([]WhisperMessage, len(messages)) |
||||
for i, msg := range messages { |
||||
msgs[i] = NewWhisperMessage(msg) |
||||
} |
||||
return msgs |
||||
} |
||||
|
||||
type PostArgs struct { |
||||
From string `json:"from"` |
||||
To string `json:"to"` |
||||
Topics [][]byte `json:"topics"` |
||||
Payload string `json:"payload"` |
||||
Priority int64 `json:"priority"` |
||||
TTL int64 `json:"ttl"` |
||||
} |
||||
|
||||
// Post injects a message into the whisper network for distribution.
|
||||
func (s *PublicWhisperAPI) Post(args *PostArgs) (bool, error) { |
||||
if s.w == nil { |
||||
return false, whisperOffLineErr |
||||
} |
||||
|
||||
// construct whisper message with transmission options
|
||||
message := NewMessage(common.FromHex(args.Payload)) |
||||
options := Options{ |
||||
To: crypto.ToECDSAPub(common.FromHex(args.To)), |
||||
TTL: time.Duration(args.TTL) * time.Second, |
||||
Topics: NewTopics(args.Topics...), |
||||
} |
||||
|
||||
// set sender identity
|
||||
if len(args.From) > 0 { |
||||
if key := s.w.GetIdentity(crypto.ToECDSAPub(common.FromHex(args.From))); key != nil { |
||||
options.From = key |
||||
} else { |
||||
return false, fmt.Errorf("unknown identity to send from: %s", args.From) |
||||
} |
||||
} |
||||
|
||||
// Wrap and send the message
|
||||
pow := time.Duration(args.Priority) * time.Millisecond |
||||
envelope, err := message.Wrap(pow, options) |
||||
if err != nil { |
||||
return false, err |
||||
} |
||||
|
||||
return true, s.w.Send(envelope) |
||||
} |
||||
|
||||
// WhisperMessage is the RPC representation of a whisper message.
|
||||
type WhisperMessage struct { |
||||
ref *Message |
||||
|
||||
Payload string `json:"payload"` |
||||
To string `json:"to"` |
||||
From string `json:"from"` |
||||
Sent int64 `json:"sent"` |
||||
TTL int64 `json:"ttl"` |
||||
Hash string `json:"hash"` |
||||
} |
||||
|
||||
func (args *PostArgs) UnmarshalJSON(data []byte) (err error) { |
||||
var obj struct { |
||||
From string `json:"from"` |
||||
To string `json:"to"` |
||||
Topics []string `json:"topics"` |
||||
Payload string `json:"payload"` |
||||
Priority rpc.HexNumber `json:"priority"` |
||||
TTL rpc.HexNumber `json:"ttl"` |
||||
} |
||||
|
||||
if err := json.Unmarshal(data, &obj); err != nil { |
||||
return err |
||||
} |
||||
|
||||
args.From = obj.From |
||||
args.To = obj.To |
||||
args.Payload = obj.Payload |
||||
args.Priority = obj.Priority.Int64() |
||||
args.TTL = obj.TTL.Int64() |
||||
|
||||
// decode topic strings
|
||||
args.Topics = make([][]byte, len(obj.Topics)) |
||||
for i, topic := range obj.Topics { |
||||
args.Topics[i] = common.FromHex(topic) |
||||
} |
||||
|
||||
return nil |
||||
} |
||||
|
||||
// UnmarshalJSON implements the json.Unmarshaler interface, invoked to convert a
|
||||
// JSON message blob into a WhisperFilterArgs structure.
|
||||
func (args *NewFilterArgs) UnmarshalJSON(b []byte) (err error) { |
||||
// Unmarshal the JSON message and sanity check
|
||||
var obj struct { |
||||
To interface{} `json:"to"` |
||||
From interface{} `json:"from"` |
||||
Topics interface{} `json:"topics"` |
||||
} |
||||
if err := json.Unmarshal(b, &obj); err != nil { |
||||
return err |
||||
} |
||||
|
||||
// Retrieve the simple data contents of the filter arguments
|
||||
if obj.To == nil { |
||||
args.To = "" |
||||
} else { |
||||
argstr, ok := obj.To.(string) |
||||
if !ok { |
||||
return fmt.Errorf("to is not a string") |
||||
} |
||||
args.To = argstr |
||||
} |
||||
if obj.From == nil { |
||||
args.From = "" |
||||
} else { |
||||
argstr, ok := obj.From.(string) |
||||
if !ok { |
||||
return fmt.Errorf("from is not a string") |
||||
} |
||||
args.From = argstr |
||||
} |
||||
// Construct the nested topic array
|
||||
if obj.Topics != nil { |
||||
// Make sure we have an actual topic array
|
||||
list, ok := obj.Topics.([]interface{}) |
||||
if !ok { |
||||
return fmt.Errorf("topics is not an array") |
||||
} |
||||
// Iterate over each topic and handle nil, string or array
|
||||
topics := make([][]string, len(list)) |
||||
for idx, field := range list { |
||||
switch value := field.(type) { |
||||
case nil: |
||||
topics[idx] = []string{} |
||||
|
||||
case string: |
||||
topics[idx] = []string{value} |
||||
|
||||
case []interface{}: |
||||
topics[idx] = make([]string, len(value)) |
||||
for i, nested := range value { |
||||
switch value := nested.(type) { |
||||
case nil: |
||||
topics[idx][i] = "" |
||||
|
||||
case string: |
||||
topics[idx][i] = value |
||||
|
||||
default: |
||||
return fmt.Errorf("topic[%d][%d] is not a string", idx, i) |
||||
} |
||||
} |
||||
default: |
||||
return fmt.Errorf("topic[%d] not a string or array", idx) |
||||
} |
||||
} |
||||
|
||||
topicsDecoded := make([][][]byte, len(topics)) |
||||
for i, condition := range topics { |
||||
topicsDecoded[i] = make([][]byte, len(condition)) |
||||
for j, topic := range condition { |
||||
topicsDecoded[i][j] = common.FromHex(topic) |
||||
} |
||||
} |
||||
|
||||
args.Topics = topicsDecoded |
||||
} |
||||
return nil |
||||
} |
||||
|
||||
// whisperFilter is the message cache matching a specific filter, accumulating
|
||||
// inbound messages until the are requested by the client.
|
||||
type whisperFilter struct { |
||||
id int // Filter identifier for old message retrieval
|
||||
ref *Whisper // Whisper reference for old message retrieval
|
||||
|
||||
cache []WhisperMessage // Cache of messages not yet polled
|
||||
skip map[common.Hash]struct{} // List of retrieved messages to avoid duplication
|
||||
update time.Time // Time of the last message query
|
||||
|
||||
lock sync.RWMutex // Lock protecting the filter internals
|
||||
} |
||||
|
||||
// messages retrieves all the cached messages from the entire pool matching the
|
||||
// filter, resetting the filter's change buffer.
|
||||
func (w *whisperFilter) messages() []*Message { |
||||
w.lock.Lock() |
||||
defer w.lock.Unlock() |
||||
|
||||
w.cache = nil |
||||
w.update = time.Now() |
||||
|
||||
w.skip = make(map[common.Hash]struct{}) |
||||
messages := w.ref.Messages(w.id) |
||||
for _, message := range messages { |
||||
w.skip[message.Hash] = struct{}{} |
||||
} |
||||
return messages |
||||
} |
||||
|
||||
// insert injects a new batch of messages into the filter cache.
|
||||
func (w *whisperFilter) insert(messages ...WhisperMessage) { |
||||
w.lock.Lock() |
||||
defer w.lock.Unlock() |
||||
|
||||
for _, message := range messages { |
||||
if _, ok := w.skip[message.ref.Hash]; !ok { |
||||
w.cache = append(w.cache, messages...) |
||||
} |
||||
} |
||||
} |
||||
|
||||
// retrieve fetches all the cached messages from the filter.
|
||||
func (w *whisperFilter) retrieve() (messages []WhisperMessage) { |
||||
w.lock.Lock() |
||||
defer w.lock.Unlock() |
||||
|
||||
messages, w.cache = w.cache, nil |
||||
w.update = time.Now() |
||||
|
||||
return |
||||
} |
||||
|
||||
// activity returns the last time instance when client requests were executed on
|
||||
// the filter.
|
||||
func (w *whisperFilter) activity() time.Time { |
||||
w.lock.RLock() |
||||
defer w.lock.RUnlock() |
||||
|
||||
return w.update |
||||
} |
||||
|
||||
// newWhisperFilter creates a new serialized, poll based whisper topic filter.
|
||||
func newWhisperFilter(id int, ref *Whisper) *whisperFilter { |
||||
return &whisperFilter{ |
||||
id: id, |
||||
ref: ref, |
||||
|
||||
update: time.Now(), |
||||
skip: make(map[common.Hash]struct{}), |
||||
} |
||||
} |
||||
|
||||
// NewWhisperMessage converts an internal message into an API version.
|
||||
func NewWhisperMessage(message *Message) WhisperMessage { |
||||
return WhisperMessage{ |
||||
ref: message, |
||||
|
||||
Payload: common.ToHex(message.Payload), |
||||
From: common.ToHex(crypto.FromECDSAPub(message.Recover())), |
||||
To: common.ToHex(crypto.FromECDSAPub(message.To)), |
||||
Sent: message.Sent.Unix(), |
||||
TTL: int64(message.TTL / time.Second), |
||||
Hash: common.ToHex(message.Hash.Bytes()), |
||||
} |
||||
} |
||||
Loading…
Reference in new issue