You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
220 lines
5.6 KiB
220 lines
5.6 KiB
// Commons for HTTP handling
|
|
package rpcserver
|
|
|
|
import (
|
|
"bufio"
|
|
"encoding/json"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"runtime/debug"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/net/netutil"
|
|
|
|
types "github.com/tendermint/tendermint/rpc/lib/types"
|
|
"github.com/tendermint/tmlibs/log"
|
|
)
|
|
|
|
// Config is an RPC server configuration.
|
|
type Config struct {
|
|
MaxOpenConnections int
|
|
}
|
|
|
|
const (
|
|
// maxBodyBytes controls the maximum number of bytes the
|
|
// server will read parsing the request body.
|
|
maxBodyBytes = int64(1000000) // 1MB
|
|
)
|
|
|
|
// StartHTTPServer starts an HTTP server on listenAddr with the given handler.
|
|
// It wraps handler with RecoverAndLogHandler.
|
|
func StartHTTPServer(
|
|
listenAddr string,
|
|
handler http.Handler,
|
|
logger log.Logger,
|
|
config Config,
|
|
) (listener net.Listener, err error) {
|
|
var proto, addr string
|
|
parts := strings.SplitN(listenAddr, "://", 2)
|
|
if len(parts) != 2 {
|
|
return nil, errors.Errorf(
|
|
"Invalid listening address %s (use fully formed addresses, including the tcp:// or unix:// prefix)",
|
|
listenAddr,
|
|
)
|
|
}
|
|
proto, addr = parts[0], parts[1]
|
|
|
|
logger.Info(fmt.Sprintf("Starting RPC HTTP server on %s", listenAddr))
|
|
listener, err = net.Listen(proto, addr)
|
|
if err != nil {
|
|
return nil, errors.Errorf("Failed to listen on %v: %v", listenAddr, err)
|
|
}
|
|
if config.MaxOpenConnections > 0 {
|
|
listener = netutil.LimitListener(listener, config.MaxOpenConnections)
|
|
}
|
|
|
|
go func() {
|
|
err := http.Serve(
|
|
listener,
|
|
RecoverAndLogHandler(maxBytesHandler{h: handler, n: maxBodyBytes}, logger),
|
|
)
|
|
logger.Error("RPC HTTP server stopped", "err", err)
|
|
}()
|
|
return listener, nil
|
|
}
|
|
|
|
// StartHTTPAndTLSServer starts an HTTPS server on listenAddr with the given
|
|
// handler.
|
|
// It wraps handler with RecoverAndLogHandler.
|
|
func StartHTTPAndTLSServer(
|
|
listenAddr string,
|
|
handler http.Handler,
|
|
certFile, keyFile string,
|
|
logger log.Logger,
|
|
config Config,
|
|
) (listener net.Listener, err error) {
|
|
var proto, addr string
|
|
parts := strings.SplitN(listenAddr, "://", 2)
|
|
if len(parts) != 2 {
|
|
return nil, errors.Errorf(
|
|
"Invalid listening address %s (use fully formed addresses, including the tcp:// or unix:// prefix)",
|
|
listenAddr,
|
|
)
|
|
}
|
|
proto, addr = parts[0], parts[1]
|
|
|
|
logger.Info(
|
|
fmt.Sprintf(
|
|
"Starting RPC HTTPS server on %s (cert: %q, key: %q)",
|
|
listenAddr,
|
|
certFile,
|
|
keyFile,
|
|
),
|
|
)
|
|
listener, err = net.Listen(proto, addr)
|
|
if err != nil {
|
|
return nil, errors.Errorf("Failed to listen on %v: %v", listenAddr, err)
|
|
}
|
|
if config.MaxOpenConnections > 0 {
|
|
listener = netutil.LimitListener(listener, config.MaxOpenConnections)
|
|
}
|
|
|
|
go func() {
|
|
err := http.ServeTLS(
|
|
listener,
|
|
RecoverAndLogHandler(maxBytesHandler{h: handler, n: maxBodyBytes}, logger),
|
|
certFile,
|
|
keyFile,
|
|
)
|
|
logger.Error("RPC HTTPS server stopped", "err", err)
|
|
}()
|
|
return listener, nil
|
|
}
|
|
|
|
func WriteRPCResponseHTTPError(
|
|
w http.ResponseWriter,
|
|
httpCode int,
|
|
res types.RPCResponse,
|
|
) {
|
|
jsonBytes, err := json.MarshalIndent(res, "", " ")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
w.WriteHeader(httpCode)
|
|
w.Write(jsonBytes) // nolint: errcheck, gas
|
|
}
|
|
|
|
func WriteRPCResponseHTTP(w http.ResponseWriter, res types.RPCResponse) {
|
|
jsonBytes, err := json.MarshalIndent(res, "", " ")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
w.Header().Set("Content-Type", "application/json")
|
|
w.WriteHeader(200)
|
|
w.Write(jsonBytes) // nolint: errcheck, gas
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// Wraps an HTTP handler, adding error logging.
|
|
// If the inner function panics, the outer function recovers, logs, sends an
|
|
// HTTP 500 error response.
|
|
func RecoverAndLogHandler(handler http.Handler, logger log.Logger) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
// Wrap the ResponseWriter to remember the status
|
|
rww := &ResponseWriterWrapper{-1, w}
|
|
begin := time.Now()
|
|
|
|
// Common headers
|
|
origin := r.Header.Get("Origin")
|
|
rww.Header().Set("Access-Control-Allow-Origin", origin)
|
|
rww.Header().Set("Access-Control-Allow-Credentials", "true")
|
|
rww.Header().Set("Access-Control-Expose-Headers", "X-Server-Time")
|
|
rww.Header().Set("X-Server-Time", fmt.Sprintf("%v", begin.Unix()))
|
|
|
|
defer func() {
|
|
// Send a 500 error if a panic happens during a handler.
|
|
// Without this, Chrome & Firefox were retrying aborted ajax requests,
|
|
// at least to my localhost.
|
|
if e := recover(); e != nil {
|
|
|
|
// If RPCResponse
|
|
if res, ok := e.(types.RPCResponse); ok {
|
|
WriteRPCResponseHTTP(rww, res)
|
|
} else {
|
|
// For the rest,
|
|
logger.Error(
|
|
"Panic in RPC HTTP handler", "err", e, "stack",
|
|
string(debug.Stack()),
|
|
)
|
|
rww.WriteHeader(http.StatusInternalServerError)
|
|
WriteRPCResponseHTTP(rww, types.RPCInternalError("", e.(error)))
|
|
}
|
|
}
|
|
|
|
// Finally, log.
|
|
durationMS := time.Since(begin).Nanoseconds() / 1000000
|
|
if rww.Status == -1 {
|
|
rww.Status = 200
|
|
}
|
|
logger.Info("Served RPC HTTP response",
|
|
"method", r.Method, "url", r.URL,
|
|
"status", rww.Status, "duration", durationMS,
|
|
"remoteAddr", r.RemoteAddr,
|
|
)
|
|
}()
|
|
|
|
handler.ServeHTTP(rww, r)
|
|
})
|
|
}
|
|
|
|
// Remember the status for logging
|
|
type ResponseWriterWrapper struct {
|
|
Status int
|
|
http.ResponseWriter
|
|
}
|
|
|
|
func (w *ResponseWriterWrapper) WriteHeader(status int) {
|
|
w.Status = status
|
|
w.ResponseWriter.WriteHeader(status)
|
|
}
|
|
|
|
// implements http.Hijacker
|
|
func (w *ResponseWriterWrapper) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
|
return w.ResponseWriter.(http.Hijacker).Hijack()
|
|
}
|
|
|
|
type maxBytesHandler struct {
|
|
h http.Handler
|
|
n int64
|
|
}
|
|
|
|
func (h maxBytesHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
|
r.Body = http.MaxBytesReader(w, r.Body, h.n)
|
|
h.h.ServeHTTP(w, r)
|
|
}
|