Official Go implementation of the Ethereum protocol
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go-ethereum/rpc/http_test.go

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// Copyright 2017 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
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"strings"
"testing"
)
func confirmStatusCode(t *testing.T, got, want int) {
t.Helper()
if got == want {
return
}
if gotName := http.StatusText(got); len(gotName) > 0 {
if wantName := http.StatusText(want); len(wantName) > 0 {
t.Fatalf("response status code: got %d (%s), want %d (%s)", got, gotName, want, wantName)
}
}
t.Fatalf("response status code: got %d, want %d", got, want)
}
func confirmRequestValidationCode(t *testing.T, method, contentType, body string, expectedStatusCode int) {
t.Helper()
s := NewServer()
request := httptest.NewRequest(method, "http://url.com", strings.NewReader(body))
if len(contentType) > 0 {
request.Header.Set("Content-Type", contentType)
}
code, err := s.validateRequest(request)
if code == 0 {
if err != nil {
t.Errorf("validation: got error %v, expected nil", err)
}
} else if err == nil {
t.Errorf("validation: code %d: got nil, expected error", code)
}
confirmStatusCode(t, code, expectedStatusCode)
}
func TestHTTPErrorResponseWithDelete(t *testing.T) {
confirmRequestValidationCode(t, http.MethodDelete, contentType, "", http.StatusMethodNotAllowed)
}
func TestHTTPErrorResponseWithPut(t *testing.T) {
confirmRequestValidationCode(t, http.MethodPut, contentType, "", http.StatusMethodNotAllowed)
}
func TestHTTPErrorResponseWithMaxContentLength(t *testing.T) {
body := make([]rune, defaultBodyLimit+1)
confirmRequestValidationCode(t,
http.MethodPost, contentType, string(body), http.StatusRequestEntityTooLarge)
}
func TestHTTPErrorResponseWithEmptyContentType(t *testing.T) {
confirmRequestValidationCode(t, http.MethodPost, "", "", http.StatusUnsupportedMediaType)
}
func TestHTTPErrorResponseWithValidRequest(t *testing.T) {
confirmRequestValidationCode(t, http.MethodPost, contentType, "", 0)
}
func confirmHTTPRequestYieldsStatusCode(t *testing.T, method, contentType, body string, expectedStatusCode int) {
t.Helper()
s := Server{}
ts := httptest.NewServer(&s)
defer ts.Close()
request, err := http.NewRequest(method, ts.URL, strings.NewReader(body))
if err != nil {
t.Fatalf("failed to create a valid HTTP request: %v", err)
}
if len(contentType) > 0 {
request.Header.Set("Content-Type", contentType)
}
resp, err := http.DefaultClient.Do(request)
if err != nil {
t.Fatalf("request failed: %v", err)
}
resp.Body.Close()
confirmStatusCode(t, resp.StatusCode, expectedStatusCode)
}
func TestHTTPResponseWithEmptyGet(t *testing.T) {
confirmHTTPRequestYieldsStatusCode(t, http.MethodGet, "", "", http.StatusOK)
}
// This checks that maxRequestContentLength is not applied to the response of a request.
func TestHTTPRespBodyUnlimited(t *testing.T) {
const respLength = defaultBodyLimit * 3
s := NewServer()
defer s.Stop()
s.RegisterName("test", largeRespService{respLength})
ts := httptest.NewServer(s)
defer ts.Close()
c, err := DialHTTP(ts.URL)
if err != nil {
t.Fatal(err)
}
defer c.Close()
var r string
if err := c.Call(&r, "test_largeResp"); err != nil {
t.Fatal(err)
}
if len(r) != respLength {
t.Fatalf("response has wrong length %d, want %d", len(r), respLength)
}
}
// Tests that an HTTP error results in an HTTPError instance
// being returned with the expected attributes.
func TestHTTPErrorResponse(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
http.Error(w, "error has occurred!", http.StatusTeapot)
}))
defer ts.Close()
c, err := DialHTTP(ts.URL)
if err != nil {
t.Fatal(err)
}
var r string
err = c.Call(&r, "test_method")
if err == nil {
t.Fatal("error was expected")
}
httpErr, ok := err.(HTTPError)
if !ok {
t.Fatalf("unexpected error type %T", err)
}
if httpErr.StatusCode != http.StatusTeapot {
t.Error("unexpected status code", httpErr.StatusCode)
}
if httpErr.Status != "418 I'm a teapot" {
t.Error("unexpected status text", httpErr.Status)
}
if body := string(httpErr.Body); body != "error has occurred!\n" {
t.Error("unexpected body", body)
}
if errMsg := httpErr.Error(); errMsg != "418 I'm a teapot: error has occurred!\n" {
t.Error("unexpected error message", errMsg)
}
}
func TestHTTPPeerInfo(t *testing.T) {
s := newTestServer()
defer s.Stop()
ts := httptest.NewServer(s)
defer ts.Close()
c, err := Dial(ts.URL)
if err != nil {
t.Fatal(err)
}
c.SetHeader("user-agent", "ua-testing")
c.SetHeader("origin", "origin.example.com")
// Request peer information.
var info PeerInfo
if err := c.Call(&info, "test_peerInfo"); err != nil {
t.Fatal(err)
}
if info.RemoteAddr == "" {
t.Error("RemoteAddr not set")
}
if info.Transport != "http" {
t.Errorf("wrong Transport %q", info.Transport)
}
if info.HTTP.Version != "HTTP/1.1" {
t.Errorf("wrong HTTP.Version %q", info.HTTP.Version)
}
if info.HTTP.UserAgent != "ua-testing" {
t.Errorf("wrong HTTP.UserAgent %q", info.HTTP.UserAgent)
}
if info.HTTP.Origin != "origin.example.com" {
t.Errorf("wrong HTTP.Origin %q", info.HTTP.UserAgent)
}
}
func TestNewContextWithHeaders(t *testing.T) {
expectedHeaders := 0
server := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
for i := 0; i < expectedHeaders; i++ {
key, want := fmt.Sprintf("key-%d", i), fmt.Sprintf("val-%d", i)
if have := request.Header.Get(key); have != want {
t.Errorf("wrong request headers for %s, want: %s, have: %s", key, want, have)
}
}
writer.WriteHeader(http.StatusOK)
_, _ = writer.Write([]byte(`{}`))
}))
defer server.Close()
client, err := Dial(server.URL)
if err != nil {
t.Fatalf("failed to dial: %s", err)
}
defer client.Close()
newHdr := func(k, v string) http.Header {
header := http.Header{}
header.Set(k, v)
return header
}
ctx1 := NewContextWithHeaders(context.Background(), newHdr("key-0", "val-0"))
ctx2 := NewContextWithHeaders(ctx1, newHdr("key-1", "val-1"))
ctx3 := NewContextWithHeaders(ctx2, newHdr("key-2", "val-2"))
expectedHeaders = 3
if err := client.CallContext(ctx3, nil, "test"); err != ErrNoResult {
t.Error("call failed", err)
}
expectedHeaders = 2
if err := client.CallContext(ctx2, nil, "test"); err != ErrNoResult {
t.Error("call failed:", err)
}
}