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main.go
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main.go
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// Copyright 2023 CloudWeGo Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"fmt"
"net/http"
"time"
"github.com/cloudwego/hertz/pkg/app"
"github.com/cloudwego/hertz/pkg/app/server"
"github.com/cloudwego/hertz/pkg/common/hlog"
"github.com/hertz-contrib/reverseproxy"
"github.com/hertz-contrib/websocket"
)
var (
proxyURL = "ws://127.0.0.1:8080/ws"
backendURL = "ws://127.0.0.1:9090/backend"
proxyAddr = "127.0.0.1:8080"
backendAddr = "127.0.0.1:9090"
)
func main() {
// websocket reverse proxy
wsrp := reverseproxy.NewWSReverseProxy(backendURL)
ps := server.Default(server.WithHostPorts(proxyAddr))
ps.GET("/ws", wsrp.ServeHTTP)
go ps.Spin()
time.Sleep(time.Second)
go func() {
// backend server
bs := server.Default(server.WithHostPorts(backendAddr))
bs.GET("/backend", func(ctx context.Context, c *app.RequestContext) {
upgrader := &websocket.HertzUpgrader{}
if err := upgrader.Upgrade(c, func(conn *websocket.Conn) {
for {
msgType, msg, err := conn.ReadMessage()
if err != nil {
hlog.Errorf("backend read message err: %v", err)
}
err = conn.WriteMessage(msgType, msg)
if err != nil {
hlog.Errorf("backend write message err: %v", err)
}
}
}); err != nil {
hlog.Errorf("upgrade error: %v", err)
return
}
})
bs.Spin()
}()
time.Sleep(time.Second)
// client
conn, _, err := reverseproxy.DefaultOptions.Dialer.Dial(proxyURL, make(http.Header))
if err != nil {
hlog.Errorf("client dial err: %v", err)
return
}
time.Sleep(time.Second)
var echoInput string
for {
fmt.Print("send: ")
_, _ = fmt.Scanln(&echoInput)
err = conn.WriteMessage(websocket.TextMessage, []byte(echoInput))
if err != nil {
hlog.Errorf("client write message err: %v", err)
}
_, echoOutput, err := conn.ReadMessage()
if err != nil {
hlog.Errorf("client read message err: %v", err)
}
fmt.Println("receive: " + string(echoOutput))
}
}