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在 AWS 应用程序负载均衡器上使用 Go 时,WebSocket 连接失败并显示 301

我尝试在 AWS Application Load Balancer 上运行带有 WebSocket 的 Go 服务器,但收到“WebSocket 握手期间错误:意外的响应代码:301”

AWS 表示应用程序负载均衡器通过ws://协议支持 WebSocket,但除了以下内容之外,我找不到任何其他文档:

这是aws 负载均衡器链接

Application Load Balancer 支持两种附加协议:WebSocket 和 HTTP/2。

WebSocket 允许您在客户端和服务器之间建立长期的 TCP 连接。这是一种比老式方法更有效的替代方法,老式方法涉及通过“心跳”长时间保持打开状态的 HTTP 连接。WebSocket 非常适合移动设备,可用于提供股票报价、体育比分和其他动态数据,同时最大限度地降低功耗。ALB 通过 ws:// 和 wss:// 协议提供对 WebSocket 的本机支持。

我可以让 JavaScript 在本地通过 WebSockets 连接到我的 Go 服务器,但是当我部署 AWS 时它不起作用。这是 JavaScript 显示 301 错误的时候。

应用程序负载均衡器正在侦听HTTP: 80,并且该流量被定向到HTTPS: 443。所有安全组的设置都非常相似,以允许流量通过。如果我在部署在 AWS 上时执行正常的 GET 调用以从服务器检索数据,那么它工作得很好。

用于连接到本地主机的本地调用

<script>

    let socket = new WebSocket("ws://localhost:8080/websocket")


    console.log("Attempting Websocket Connection")


    socket.onopen = () => {

        console.log("Successfully Connected");

        socket.send("Hi From the Client!")

    }


    socket.onclose = (event) => {

        console.log("Socket Closed Connection: ", event)

    }


    socket.onmessage = (msg) => {

        console.log(msg);

    }


    socket.onerror = (error) => {

        console.log("Socket Error: ", error)

    }

</script>

连接到不工作的远程服务器。


<script>

    let socket = new WebSocket("ws://myexamplesite.com/websocket")


    console.log("Attempting Websocket Connection")


    socket.onopen = () => {

        console.log("Successfully Connected");

        socket.send("Hi From the Client!")

    }


    socket.onclose = (event) => {

        console.log("Socket Closed Connection: ", event)

    }


    socket.onmessage = (msg) => {

        console.log(msg);

    }


    socket.onerror = (error) => {

        console.log("Socket Error: ", error)

    }

</script>

nginx.conf


events {

    worker_connections 1024;

}


http {

  server_tokens off;

  server {

    listen 80;


    location / {

      proxy_set_header X-Forwarded-For $remote_addr;

      proxy_set_header Host            $http_host;

      proxy_pass http://web:8080/;

    }

  }

}

我希望能够建立 WebSocket 连接,但 JavaScript 文件返回以下错误:


与&ldquo;ws://myexamplesite.com/websocket&rdquo;的 WebSocket 连接失败:WebSocket 握手期间出错:意外的响应代码:301


拉莫斯之舞
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2回答

噜噜哒

我能够通过结合这两个答案来使其发挥作用。nginx.conf 现在看起来像http {&nbsp; server_tokens off;&nbsp; server {&nbsp; &nbsp; listen 80;&nbsp; &nbsp; location / {&nbsp; &nbsp; &nbsp; proxy_set_header X-Forwarded-For $remote_addr;&nbsp; &nbsp; &nbsp; proxy_set_header Host&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $http_host;&nbsp; &nbsp; &nbsp; proxy_pass http://web:8080/;&nbsp; &nbsp; }&nbsp; &nbsp; location /websocket {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;proxy_http_version 1.1;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;proxy_set_header Upgrade $http_upgrade;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;proxy_set_header Connection "upgrade";&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;proxy_pass http://web:8080/websocket;&nbsp; &nbsp; }&nbsp; }}然后将 JavaScript 文件ws://更改为wss://<script>&nbsp; &nbsp; let socket = new WebSocket("wss://myexamplesite.com/websocket")&nbsp; &nbsp; console.log("Attempting Websocket Connection")&nbsp; &nbsp; socket.onopen = () => {&nbsp; &nbsp; &nbsp; &nbsp; console.log("Successfully Connected");&nbsp; &nbsp; &nbsp; &nbsp; socket.send("Hi From the Client!")&nbsp; &nbsp; }&nbsp; &nbsp; socket.onclose = (event) => {&nbsp; &nbsp; &nbsp; &nbsp; console.log("Socket Closed Connection: ", event)&nbsp; &nbsp; }&nbsp; &nbsp; socket.onmessage = (msg) => {&nbsp; &nbsp; &nbsp; &nbsp; console.log(msg);&nbsp; &nbsp; }&nbsp; &nbsp; socket.onerror = (error) => {&nbsp; &nbsp; &nbsp; &nbsp; console.log("Socket Error: ", error)&nbsp; &nbsp; }</script>

慕容708150

首先检查 AWS ALB 配置方面的所有内容是否正确,并且请求是否已到达 Nginx 服务器,您可以在日志中检查该服务器。还可以尝试通过 Nginx 访问您的 websocket URL。您需要在 Nginx 中进行额外的配置来支持您所在位置下的 websockets,如下所述:proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "Upgrade";我也遇到过同样的问题,并且使用这个配置开始变得轻而易举。注意:Websockets 肯定可以与 AWS ALB 配合使用,所以不要怀疑这一部分。
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