mirror of
https://gitee.com/rainbond/Rainbond.git
synced 2024-12-05 05:07:38 +08:00
140 lines
3.6 KiB
Go
140 lines
3.6 KiB
Go
|
|
// RAINBOND, Application Management Platform
|
|
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version. For any non-GPL usage of Rainbond,
|
|
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
|
|
// must be obtained first.
|
|
|
|
// This program 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 General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package proxy
|
|
|
|
import (
|
|
"log"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/Sirupsen/logrus"
|
|
"github.com/gorilla/websocket"
|
|
)
|
|
|
|
//WebSocketProxy WebSocketProxy
|
|
type WebSocketProxy struct {
|
|
name string
|
|
endpoints EndpointList
|
|
lb LoadBalance
|
|
}
|
|
|
|
//Proxy 代理
|
|
func (h *WebSocketProxy) Proxy(w http.ResponseWriter, r *http.Request) {
|
|
upgrader := websocket.Upgrader{
|
|
EnableCompression: true,
|
|
Error: func(w http.ResponseWriter, r *http.Request, status int, reason error) {
|
|
w.WriteHeader(500)
|
|
},
|
|
CheckOrigin: func(r *http.Request) bool {
|
|
return true
|
|
},
|
|
}
|
|
conn, err := upgrader.Upgrade(w, r, nil)
|
|
if err != nil {
|
|
logrus.Error("Create web socket conn error.", err.Error())
|
|
return
|
|
}
|
|
defer conn.Close()
|
|
|
|
endpoint := h.lb.Select(r, h.endpoints)
|
|
path := r.RequestURI
|
|
if strings.Contains(path, "?") {
|
|
path = path[:strings.Index(path, "?")]
|
|
}
|
|
u := url.URL{Scheme: "ws", Host: endpoint.String(), Path: path}
|
|
|
|
logrus.Infof("connecting to %s", u.String())
|
|
c, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
|
|
if err != nil {
|
|
logrus.Errorf("dial websocket endpoint %s error. %s", u.String(), err.Error())
|
|
w.WriteHeader(500)
|
|
return
|
|
}
|
|
defer c.Close()
|
|
done := make(chan struct{})
|
|
go func() {
|
|
defer c.Close()
|
|
defer close(done)
|
|
for {
|
|
select {
|
|
case <-r.Context().Done():
|
|
return
|
|
default:
|
|
}
|
|
t, message, err := c.ReadMessage()
|
|
if err != nil {
|
|
logrus.Println("read proxy websocket message error: ", err)
|
|
return
|
|
}
|
|
err = conn.WriteMessage(t, message)
|
|
if err != nil {
|
|
logrus.Println("write client websocket message error: ", err)
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
for {
|
|
select {
|
|
case <-r.Context().Done():
|
|
// To cleanly close a connection, a client should send a close
|
|
// frame and wait for the server to close the connection.
|
|
err := c.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
|
|
if err != nil {
|
|
log.Println("write close:", err)
|
|
return
|
|
}
|
|
select {
|
|
case <-done:
|
|
case <-time.After(time.Second):
|
|
}
|
|
c.Close()
|
|
return
|
|
case <-done:
|
|
return
|
|
default:
|
|
}
|
|
t, message, err := conn.ReadMessage()
|
|
if err != nil {
|
|
logrus.Errorln("read client websocket message error: ", err)
|
|
return
|
|
}
|
|
err = c.WriteMessage(t, message)
|
|
if err != nil {
|
|
logrus.Errorln("write proxy websocket message error: ", err)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
//UpdateEndpoints 更新后端点
|
|
func (h *WebSocketProxy) UpdateEndpoints(endpoints ...string) {
|
|
h.endpoints = CreateEndpoints(endpoints)
|
|
}
|
|
|
|
func createWebSocketProxy(name string, endpoints []string) *WebSocketProxy {
|
|
if name != "dockerlog" {
|
|
return &WebSocketProxy{name, CreateEndpoints(endpoints), NewRoundRobin()}
|
|
}
|
|
return &WebSocketProxy{name, CreateEndpoints(endpoints), NewSelectBalance()}
|
|
|
|
}
|