Azure WebSocket在使用Go的httpPlatformHandler时无法工作。

huangapple
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英文:

Azure WebSocket not working with Go httpPlatformHandler

问题

我在Azure Web App上使用WebSocket遇到了困难，我正在将一个Node应用程序从Azure迁移到Go应用程序。

WebSocket在门户上已启用，这是我的web.config配置文件：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <configuration>
  3.   <system.web>
  4.         <customErrors mode="Off"/>
  5.     </system.web>
  6.     <system.webServer>
  7.         <webSocket enabled="false" />
  8.         <handlers>
  9.             <add name="httpplatformhandler" path="*" verb="*" modules="httpPlatformHandler" resourceType="Unspecified" />
  10.         </handlers>
  11.         <httpPlatform stdoutLogEnabled="true" processPath="d:\home\site\wwwroot\v-0.0.10.exe"
  12.                       arguments=""
  13.                       startupTimeLimit="60">
  14.             <environmentVariables>
  15.               <environmentVariable name="GOROOT" value="d:\home\site\wwwroot\go" />
  16.             </environmentVariables>
  17.         </httpPlatform>
  18.     </system.webServer>
  19. </configuration>

当然，在本地它工作正常。起初，我只尝试了这个示例：

  1. package main
  3. import (
  4. 	"code.google.com/p/go.net/websocket"
  5. 	"io"
  6. 	"net/http"
  7.     "os"
  8. )
  10. func echoHandler(ws *websocket.Conn) {
  11. 	io.Copy(ws, ws)
  12. }
  14. func main() {
  15. 	http.Handle("/echo", websocket.Handler(echoHandler))
  16. 	http.Handle("/", http.FileServer(http.Dir(".")))
  17. 	err := http.ListenAndServe(":"+os.Getevn("HTTP_PLATFORM_PORT"), nil)
  18. 	if err != nil {
  19. 		panic("ListenAndServe: " + err.Error())
  20. 	}
  21. }

在客户端，我只是尝试连接：

  1. var ws = new WebSocket("url");
  2. ws.onopen = function() { ws.send("test"); }
  3. ws.onmessage = function(e) { console.log(e.data); }

在部署到Azure后，readyState始终保持为0，onopen从未被调用。最终失败，并显示连接错误：

  1. WebSocket connection to 'wss://***.azurewebsites.net/echo' failed: Error during WebSocket handshake: Unexpected response code: 500

我甚至尝试使用Gorilla WebSocket示例，以查看是否是Go扩展包的问题。

我尝试过的事情：

  1. 从web.config中删除<webSocket enabled="false" /> [相同的问题，但似乎需要更长时间才会发生。

  2. 添加一个标准的http.HandleFunc来提供一个“标准”页面，它可以正常工作。

我在Azure上部署了一些Go应用程序，只是第一个需要使用WebSocket的应用程序，我想知道我做错了什么/没有理解的地方。

非常感谢任何帮助。

英文:

I'm having a hard time making websocket works on an Azure Web App, I'm currently porting a Node app from Azure to a Go app.

WebSocket is enable on the portal and here's my web.config

  1. &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
  2. &lt;configuration&gt;
  3.   &lt;system.web&gt;
  4.         &lt;customErrors mode=&quot;Off&quot;/&gt;
  5.     &lt;/system.web&gt;
  6.     &lt;system.webServer&gt;
  7.         &lt;webSocket enabled=&quot;false&quot; /&gt;
  8.         &lt;handlers&gt;
  9.             &lt;add name=&quot;httpplatformhandler&quot; path=&quot;*&quot; verb=&quot;*&quot; modules=&quot;httpPlatformHandler&quot; resourceType=&quot;Unspecified&quot; /&gt;
  10.         &lt;/handlers&gt;
  11.         &lt;httpPlatform stdoutLogEnabled=&quot;true&quot; processPath=&quot;d:\home\site\wwwroot\v-0.0.10.exe&quot;
  12.                       arguments=&quot;&quot;
  13.                       startupTimeLimit=&quot;60&quot;&gt;
  14.             &lt;environmentVariables&gt;
  15.               &lt;environmentVariable name=&quot;GOROOT&quot; value=&quot;d:\home\site\wwwroot\go&quot; /&gt;
  16.             &lt;/environmentVariables&gt;
  17.         &lt;/httpPlatform&gt;
  18.     &lt;/system.webServer&gt;
  19. &lt;/configuration&gt;

Of course locally it's working fine. At first I only tried this sample:

  1. package main
  3. import (
  4. 	&quot;code.google.com/p/go.net/websocket&quot;
  5. 	&quot;io&quot;
  6. 	&quot;net/http&quot;
  7.     &quot;os&quot;
  8. )
  10. func echoHandler(ws *websocket.Conn) {
  11. 	io.Copy(ws, ws)
  12. }
  14. func main() {
  15. 	http.Handle(&quot;/echo&quot;, websocket.Handler(echoHandler))
  16. 	http.Handle(&quot;/&quot;, http.FileServer(http.Dir(&quot;.&quot;)))
  17. 	err := http.ListenAndServe(&quot;:&quot;+os.Getevn(&quot;HTTP_PLATFORM_PORT&quot;), nil)
  18. 	if err != nil {
  19. 		panic(&quot;ListenAndServe: &quot; + err.Error())
  20. 	}
  21. }

On the client side I simply try to connect:

  1. var ws = new WebSocket(&quot;url&quot;)
  2. ws.onopen = function() { ws.send(&quot;test&quot;); }
  3. ws.onmessage = function(e) { console.log(e.data); }

When deployed on Azure, the readystate always stays at 0, onopen is never call. It ultimately failed saying there's an error connecting:

  1. WebSocket connection to &#39;wss://***.azurewebsites.net/echo&#39; failed: Error during WebSocket handshake: Unexpected response code: 500

I even tried with Gorilla Websocket example to see if the Go extended package was in cause.

Things I tried:

  1. Removed the &lt;webSocket enabled=&quot;false&quot; /&gt; from web.config [same issue but it appears to take longer before occuring

  2. Adding a standard http.HandleFunc to serve a "standard" page and it works fine.

I have a handful of Go app deploy to Azure, it's just the first one that I would need to use websocket, and I would like to know what I'm doing wrong / not understanding.

Any help would be greatly appreciated

答案1

得分: 1

我参考了你的代码并创建了一个示例，它对我来说有效。我没有做任何自定义的web.config，而是使用了来自Azure部署脚本的默认配置。

这是示例仓库的链接：https://github.com/shrimpy/gowebsockettry

Azure WebSocket在使用Go的httpPlatformHandler时无法工作。

英文:

I reference your code and created a sample, it is working for me.
I didn`t do any custom web.config but using the default one come from Azure Deployment script.

here is the sample repo: https://github.com/shrimpy/gowebsockettry

Azure WebSocket在使用Go的httpPlatformHandler时无法工作。

huangapple
  • 本文由 发表于 2015年11月12日 23:40:04
  • 转载请务必保留本文链接：https://go.coder-hub.com/33675348.html
  • azure
  • azure-web-app-service
  • go
  • websocket
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