Meteor WebSocket 与 nginx 握手错误 400

我设法在我的基础设施（Webfactions）上部署 Meteor。 该应用程序似乎工作正常，但当我的应用程序启动时，我在浏览器控制台中收到以下错误：

WebSocket connection to 'ws://.../websocket' failed: Error during WebSocket handshake: Unexpected response code: 400

WebSocket 速度很快，您不必（也不应该）禁用它们。

造成这个错误的真正原因是Webfactions使用了nginx，而nginx配置不当。以下是如何正确配置 nginx 来代理 WebSocket 请求 http://nginx.org/en/docs/http/websocket.html， 通过设置proxy_set_header Upgrade $http_upgrade; and proxy_set_header Connection $connection_upgrade;:

# we're in the http context here
map $http_upgrade $connection_upgrade {
  default upgrade;
  ''      close;
}

# the Meteor / Node.js app server
server {
  server_name yourdomain.com;

  access_log /etc/nginx/logs/yourapp.access;
  error_log /etc/nginx/logs/yourapp.error error;

  location / {
    proxy_pass http://localhost:3000;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $host;  # pass the host header - http://wiki.nginx.org/HttpProxyModule#proxy_pass

    proxy_http_version 1.1;  # recommended with keepalive connections - http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_http_version

    # WebSocket proxying - from http://nginx.org/en/docs/http/websocket.html
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
  }

}

这是基于 nginx 配置的改进David Weldon 的 nginx 配置 https://stackoverflow.com/questions/18003689/recommended-nginx-configuration-for-meteor。毛泽东已经达到了非常相似的配置 https://stackoverflow.com/a/24497020/1269037.

请记住还要设置HTTP_FORWARDED_COUNT http://docs.meteor.com/#/full/meteor_onconnection环境变量设置为应用程序前面的代理数量（通常为 1）。