forked from mirror/go-ethereum
cmd/swarm, swarm: cross-platform Content-Type detection (#17782)
- Mime types generator (Standard "mime" package rely on system-settings, see mime.osInitMime)
- Changed swarm/api.Upload:
- simplify I/O throttling by semaphore primitive and use file name where possible
- f.Close() must be called in Defer - otherwise panic or future added early return will cause leak of file descriptors
- one error was suppressed
release/1.8
Alexey Sharov
6 years ago
committed by
Anton Evangelatov
parent
b69942befe
commit
dc5d643bb5
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// Copyright 2018 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 main |
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// Standard "mime" package rely on system-settings, see mime.osInitMime
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// Swarm will run on many OS/Platform/Docker and must behave similar
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// This command generates code to add common mime types based on mime.types file
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//
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// mime.types file provided by mailcap, which follow https://www.iana.org/assignments/media-types/media-types.xhtml
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//
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// Get last version of mime.types file by:
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// docker run --rm -v $(pwd):/tmp alpine:edge /bin/sh -c "apk add -U mailcap; mv /etc/mime.types /tmp"
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import ( |
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"bufio" |
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"bytes" |
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"flag" |
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"html/template" |
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"io/ioutil" |
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"strings" |
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"log" |
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) |
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var ( |
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typesFlag = flag.String("types", "", "Input mime.types file") |
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packageFlag = flag.String("package", "", "Golang package in output file") |
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outFlag = flag.String("out", "", "Output file name for the generated mime types") |
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) |
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type mime struct { |
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Name string |
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Exts []string |
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} |
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type templateParams struct { |
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PackageName string |
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Mimes []mime |
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} |
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func main() { |
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// Parse and ensure all needed inputs are specified
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flag.Parse() |
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if *typesFlag == "" { |
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log.Fatalf("--types is required") |
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} |
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if *packageFlag == "" { |
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log.Fatalf("--types is required") |
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} |
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if *outFlag == "" { |
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log.Fatalf("--out is required") |
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} |
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params := templateParams{ |
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PackageName: *packageFlag, |
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} |
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types, err := ioutil.ReadFile(*typesFlag) |
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if err != nil { |
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log.Fatal(err) |
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} |
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scanner := bufio.NewScanner(bytes.NewReader(types)) |
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for scanner.Scan() { |
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txt := scanner.Text() |
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if strings.HasPrefix(txt, "#") || len(txt) == 0 { |
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continue |
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} |
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parts := strings.Fields(txt) |
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if len(parts) == 1 { |
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continue |
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} |
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params.Mimes = append(params.Mimes, mime{parts[0], parts[1:]}) |
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} |
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if err = scanner.Err(); err != nil { |
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log.Fatal(err) |
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} |
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result := bytes.NewBuffer([]byte{}) |
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if err := template.Must(template.New("_").Parse(tpl)).Execute(result, params); err != nil { |
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log.Fatal(err) |
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} |
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if err := ioutil.WriteFile(*outFlag, result.Bytes(), 0600); err != nil { |
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log.Fatal(err) |
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} |
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} |
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var tpl = `// Code generated by github.com/ethereum/go-ethereum/cmd/swarm/mimegen. DO NOT EDIT.
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package {{ .PackageName }} |
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import "mime" |
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func init() { |
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var mimeTypes = map[string]string{ |
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{{- range .Mimes -}} |
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{{ $name := .Name -}} |
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{{- range .Exts }} |
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".{{ . }}": "{{ $name | html }}", |
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{{- end }} |
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{{- end }} |
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} |
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for ext, name := range mimeTypes { |
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if err := mime.AddExtensionType(ext, name); err != nil { |
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panic(err) |
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} |
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} |
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} |
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` |
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