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.
137 lines
3.9 KiB
137 lines
3.9 KiB
// Commons for HTTP handling
|
|
package rpcserver
|
|
|
|
import (
|
|
"bufio"
|
|
"encoding/json"
|
|
"fmt"
|
|
"net"
|
|
"net/http"
|
|
"runtime/debug"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
types "github.com/tendermint/tendermint/rpc/lib/types"
|
|
"github.com/tendermint/tmlibs/log"
|
|
)
|
|
|
|
func StartHTTPServer(listenAddr string, handler http.Handler, logger log.Logger) (listener net.Listener, err error) {
|
|
// listenAddr should be fully formed including tcp:// or unix:// prefix
|
|
var proto, addr string
|
|
parts := strings.SplitN(listenAddr, "://", 2)
|
|
if len(parts) != 2 {
|
|
logger.Error("WARNING (tendermint/rpc/lib): Please use fully formed listening addresses, including the tcp:// or unix:// prefix")
|
|
// we used to allow addrs without tcp/unix prefix by checking for a colon
|
|
// TODO: Deprecate
|
|
proto = types.SocketType(listenAddr)
|
|
addr = listenAddr
|
|
// return nil, errors.Errorf("Invalid listener address %s", lisenAddr)
|
|
} else {
|
|
proto, addr = parts[0], parts[1]
|
|
}
|
|
|
|
logger.Info(fmt.Sprintf("Starting RPC HTTP server on %s socket %v", proto, addr))
|
|
listener, err = net.Listen(proto, addr)
|
|
if err != nil {
|
|
return nil, errors.Errorf("Failed to listen to %v: %v", listenAddr, err)
|
|
}
|
|
|
|
go func() {
|
|
res := http.Serve(
|
|
listener,
|
|
RecoverAndLogHandler(handler, logger),
|
|
)
|
|
logger.Error("RPC HTTP server stopped", "result", res)
|
|
}()
|
|
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)
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// 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()
|
|
}
|