ljy*_*10a 1 sockets go websocket
我正在编写一个html需要创建websocket服务器的页面
在服务器上,我使用"code.google.com/p/go.net/websocket"中的示例只接受连接.
但是,在Chrome26中,响应是
与'ws://127.0.0.1:1234 /'的WebSocket连接失败:意外的响应代码:400
是否遗漏了某些东西(如握手)？
这是我html和服务器正在使用的go
<html>
<head></head>
<body>
<script type="text/javascript">
var sock = null;
var wsuri = "ws://127.0.0.1:1234";
window.onload = function() {
console.log("onload");
sock = new WebSocket(wsuri);
sock.onopen = function() {
console.log("connected to " + wsuri);
}
sock.onclose = function(e) {
console.log("connection closed (" + e.code + ")");
}
sock.onmessage = function(e) {
console.log("message received: " + e.data);
}
};
function send() {
var msg = document.getElementById('message').value;
sock.send(msg);
};
</script>
<h1>WebSocket Echo Test</h1>
<form>
<p>
Message: <input id="message" type="text" value="Hello, world!">
</p>
</form>
<button onclick="send();">Send Message</button>
</body>
</html>
// ------------------------------
package main
import (
"code.google.com/p/go.net/websocket"
"fmt"
"log"
"net/http"
)
func Echo(ws *websocket.Conn) {
var err error
for {
var reply string
if err = websocket.Message.Receive(ws, &reply); err != nil {
fmt.Println("Can't receive")
break
}
fmt.Println("Received back from client: " + reply)
msg := "Received: " + reply
fmt.Println("Sending to client: " + msg)
if err = websocket.Message.Send(ws, msg); err != nil {
fmt.Println("Can't send")
break
}
}
}
func main() {
http.Handle("/", websocket.Handler(Echo))
if err := http.ListenAndServe(":1234", nil); err != nil {
log.Fatal("ListenAndServe:", err)
}
}
Chrome可能会抛出400错误,因为它认为您正在尝试向websocket服务器执行跨域请求,并认为您不太可能获得权限.
要解决这个问题,您只需要从您的服务器上为您的html提供服务go.
所以将sock.go代码更改为:
package main
import (
"code.google.com/p/go.net/websocket"
"fmt"
"log"
"net/http"
)
func Echo(ws *websocket.Conn) {
var err error
for {
var reply string
if err = websocket.Message.Receive(ws, &reply); err != nil {
fmt.Println("Can't receive")
break
}
fmt.Println("Received back from client: " + reply)
msg := "Received: " + reply
fmt.Println("Sending to client: " + msg)
if err = websocket.Message.Send(ws, msg); err != nil {
fmt.Println("Can't send")
break
}
}
}
func main() {
http.Handle("/", http.FileServer(http.Dir("."))) // <-- note this line
http.Handle("/socket", websocket.Handler(Echo))
log.Println("serving")
if err := http.ListenAndServe(":1234", nil); err != nil {
log.Fatal("ListenAndServe:", err)
}
}
并将您的index.html文件添加到sock.go文件所在的目录中:
<html>
<head></head>
<body>
<script type="text/javascript">
var sock = null;
var wsuri = "ws://127.0.0.1:1234/socket"; // <-- note new path
window.onload = function() {
console.log("onload");
sock = new WebSocket(wsuri);
sock.onopen = function() {
console.log("connected to " + wsuri);
}
sock.onclose = function(e) {
console.log("connection closed (" + e.code + ")");
}
sock.onmessage = function(e) {
console.log("message received: " + e.data);
}
};
function send() {
var msg = document.getElementById('message').value;
sock.send(msg);
};
</script>
<h1>WebSocket Echo Test</h1>
<form>
<p>
Message: <input id="message" type="text" value="Hello, world!">
</p>
</form>
<button onclick="send();">Send Message</button>
</body>
</html>
现在,您将能够在chrome中进行连接.
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