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rpc: minor cleanups to RPC PR

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This commit is contained in:
Péter Szilágyi
2017-11-17 14:18:46 +02:00
parent c5b8569707
commit 3c6b9c5d72
2 changed files with 38 additions and 28 deletions
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32
rpc/http.go
View File

@@ -20,6 +20,7 @@ import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
@@ -151,41 +152,36 @@ func (srv *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" && r.ContentLength == 0 && r.URL.RawQuery == "" {
return
}
if responseCode, errorMessage := httpErrorResponse(r); responseCode != 0 {
http.Error(w, errorMessage, responseCode)
if code, err := validateRequest(r); err != nil {
http.Error(w, err.Error(), code)
return
}
// All checks passed, create a codec that reads direct from the request body
// untilEOF and writes the response to w and order the server to process a
// single request.
codec := NewJSONCodec(&httpReadWriteNopCloser{r.Body, w})
defer codec.Close()
w.Header().Set("content-type", "application/json")
w.Header().Set("content-type", contentType)
srv.ServeSingleRequest(codec, OptionMethodInvocation)
}
// Returns a non-zero response code and error message if the request is invalid.
func httpErrorResponse(r *http.Request) (int, string) {
// validateRequest returns a non-zero response code and error message if the
// request is invalid.
func validateRequest(r *http.Request) (int, error) {
if r.Method == "PUT" || r.Method == "DELETE" {
errorMessage := "method not allowed"
return http.StatusMethodNotAllowed, errorMessage
return http.StatusMethodNotAllowed, errors.New("method not allowed")
}
if r.ContentLength > maxHTTPRequestContentLength {
errorMessage := fmt.Sprintf("content length too large (%d>%d)", r.ContentLength, maxHTTPRequestContentLength)
return http.StatusRequestEntityTooLarge, errorMessage
err := fmt.Errorf("content length too large (%d>%d)", r.ContentLength, maxHTTPRequestContentLength)
return http.StatusRequestEntityTooLarge, err
}
ct := r.Header.Get("content-type")
mt, _, err := mime.ParseMediaType(ct)
mt, _, err := mime.ParseMediaType(r.Header.Get("content-type"))
if err != nil || mt != contentType {
errorMessage := fmt.Sprintf("invalid content type, only %s is supported", contentType)
return http.StatusUnsupportedMediaType, errorMessage
err := fmt.Errorf("invalid content type, only %s is supported", contentType)
return http.StatusUnsupportedMediaType, err
}
return 0, ""
return 0, nil
}
func newCorsHandler(srv *Server, allowedOrigins []string) http.Handler {

34
rpc/http_test.go
View File

@@ -1,3 +1,19 @@
// 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 (
@@ -8,33 +24,31 @@ import (
)
func TestHTTPErrorResponseWithDelete(t *testing.T) {
httpErrorResponseTest(t, "DELETE", contentType, "", http.StatusMethodNotAllowed)
testHTTPErrorResponse(t, "DELETE", contentType, "", http.StatusMethodNotAllowed)
}
func TestHTTPErrorResponseWithPut(t *testing.T) {
httpErrorResponseTest(t, "PUT", contentType, "", http.StatusMethodNotAllowed)
testHTTPErrorResponse(t, "PUT", contentType, "", http.StatusMethodNotAllowed)
}
func TestHTTPErrorResponseWithMaxContentLength(t *testing.T) {
body := make([]rune, maxHTTPRequestContentLength+1, maxHTTPRequestContentLength+1)
httpErrorResponseTest(t,
testHTTPErrorResponse(t,
"POST", contentType, string(body), http.StatusRequestEntityTooLarge)
}
func TestHTTPErrorResponseWithEmptyContentType(t *testing.T) {
httpErrorResponseTest(t, "POST", "", "", http.StatusUnsupportedMediaType)
testHTTPErrorResponse(t, "POST", "", "", http.StatusUnsupportedMediaType)
}
func TestHTTPErrorResponseWithValidRequest(t *testing.T) {
httpErrorResponseTest(t, "POST", contentType, "", 0)
testHTTPErrorResponse(t, "POST", contentType, "", 0)
}
func httpErrorResponseTest(t *testing.T,
method, contentType, body string, expectedResponse int) {
func testHTTPErrorResponse(t *testing.T, method, contentType, body string, expected int) {
request := httptest.NewRequest(method, "http://url.com", strings.NewReader(body))
request.Header.Set("content-type", contentType)
if response, _ := httpErrorResponse(request); response != expectedResponse {
t.Fatalf("response code should be %d not %d", expectedResponse, response)
if code, _ := validateRequest(request); code != expected {
t.Fatalf("response code should be %d not %d", expected, code)
}
}