python - 关于tornado中websocket模块报 Can "Upgrade" only to "WebSocket"，

Question

在tornado中使用websocket实现长轮询，打开页面控制台发现出现了“Failed to load resource: the server responded with a status of 400 (Bad Request)”，打开出现了Can "Upgrade" only to "WebSocket"，请问高手...

怪我咯 · Answer

那是因为你直接用http协议访问的。
websocket客户端要用要用ws://