Handshake failed due to invalid Upgrade header: null 解决方案

解决方案，在  Nginx  ，location 中添加以下红色代码：

proxy_set_header Upgrade $http_upgrade;

proxy_set_header Connection  "upgrade";

 

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server {         listen 80;         server_name localhost;             location / {                 proxy_set_header X-Real-IP $remote_addr;                 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;                 proxy_set_header Host $http_host;                 proxy_set_header X-NginX-Proxy true;                   # prevents 502 bad gateway error                 proxy_buffers 8 32k;                 proxy_buffer_size 64k;                   proxy_pass http://127.0.0.1:8080;                 proxy_redirect off;                   # enables WS support                 proxy_http_version 1.1;                 proxy_set_header Upgrade $http_upgrade;                 proxy_set_header Connection  "upgrade";         } }