英文:
Static html page created the WebSocket connection golang server directly
问题
我正在编写一个需要创建到服务器的websocket的html页面。
在服务器上，我使用了code.google.com/p/go.net/websocket中的示例来接受连接。
然而，在Chrome26中，响应是
WebSocket连接到'ws://127.0.0.1:1234/'失败：意外的响应代码：400
有什么我漏掉的东西（比如握手）吗？
这是我的html，服务器使用的是go语言
<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)
}
}
英文:
I'm writing an html page that needs to create a websocket to the server
On the server, I used the example in "code.google.com/p/go.net/websocket" just accept the connection.
However, in Chrome26 the response is
WebSocket connection to 'ws://127.0.0.1:1234/' failed: Unexpected response code: 400
Is there something is missed (like a handshake)?
This is my html and server is using 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)
}
}
答案1
得分: 5
Chrome可能会抛出400错误，因为它认为您正在尝试对websocket服务器进行跨域请求，并认为您可能没有权限。
要解决此问题，您只需从您的go服务器上提供html。
所以将您的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("无法接收")
break
}
fmt.Println("从客户端接收到的消息：" + reply)
msg := "接收到的消息：" + reply
fmt.Println("发送给客户端的消息：" + msg)
if err = websocket.Message.Send(ws, msg); err != nil {
fmt.Println("无法发送")
break
}
}
}
func main() {
http.Handle("/", http.FileServer(http.Dir("."))) // <-- 注意这一行
http.Handle("/socket", websocket.Handler(Echo))
log.Println("服务中")
if err := http.ListenAndServe(":1234", nil); err != nil {
log.Fatal("ListenAndServe:", err)
}
}
并将您的index.html文件添加到与sock.go文件相同的目录中：
<html>
<head></head>
<body>
<script type="text/javascript">
var sock = null;
var wsuri = "ws://127.0.0.1:1234/socket"; // <-- 注意新的路径
window.onload = function() {
console.log("onload");
sock = new WebSocket(wsuri);
sock.onopen = function() {
console.log("已连接到" + wsuri);
}
sock.onclose = function(e) {
console.log("连接已关闭（" + e.code + "）");
}
sock.onmessage = function(e) {
console.log("收到消息：" + e.data);
}
};
function send() {
var msg = document.getElementById('message').value;
sock.send(msg);
};
</script>
<h1>WebSocket Echo测试</h1>
<form>
<p>
消息：<input id="message" type="text" value="Hello, world!">
</p>
</form>
<button onclick="send();">发送消息</button>
</body>
</html>
现在您将能够在Chrome中进行连接。
英文:
Chrome is likely throwing error 400 because it thinks you are trying to do a cross-domain request to the websocket server and thinks it is unlikely you have permission.
To solve the issue you simply have to server your html from your go-server too.
So change your sock.go code to:
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)
}
}
and add your index.html file to the same directory as your sock.go file:
<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>
Now you will be able to connect from within chrome.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论