WebSocket连接到 失败：WebSocket握手期间出错：意外的响应代码：521

本文档适用于那些使用laravel echo服务器＆nginx＆socket.io＆redis-server并在客户端项目和redis-
server之间使用分开的服务器的用户。

1）编辑

/etc/redis/redis.conf

bind 127.0.0.1supervised no

至

bind 0.0.0.0supervised systemd

2）更新

/etc/systemd/system/redis.service

[Service]

Type=notifyExecStart=/usr/bin/redis-server /etc/redis/redis.conf  --supervised systemd

3）Nginx

/etc/nginx/sites-enabled/reverse-proxy.conf

server {  listen        443 ssl;  listen        [::]:443 ssl;  server_name   mysitecom;  error_log     /var/log/nginx/proxy-error.log error;  # Start the SSL configurations  ssl   on;  ssl_certificate  /etc/nginx/certs/mysitecom.pem;  ssl_certificate_key         /etc/nginx/certs/mysitecom.key;  ssl_session_timeout         3m;  ssl_session_cacheshared:SSL:50m;  ssl_protocols    TLSv1.1 TLSv1.2;  # Diffie Hellmann performance improvements  ssl_ecdh_curve   secp384r1;  location /socket.io {    proxy_pass    http://mysitecom:2096;    proxy_http_version 1.1;    proxy_set_header Upgrade $http_upgrade;    proxy_set_header Connection         "upgrade";    proxy_set_header Host    $host;    proxy_set_header X-Real-IP          $remote_addr;    proxy_buffers 16 4k;    proxy_buffer_size 2k;    proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;    proxy_set_header X-Forwarded-Proto  https;    proxy_set_header X-VerifiedViaNginx yes;    proxy_read_timeout       2h;    proxy_connect_timeout    2h;    proxy_redirectoff;  }}

4）laravel-echo-server.json

{    "authHost": "https://mysitecom",    "authEndpoint": "/broadcasting/auth",    "clients": [        { "appId": "e45c056ec8ca8bd7", "key": "88d316b5cccafbc5e905aa9ee13e63f7"        }    ],    "database": "redis",    "databaseConfig": {        "redis": { "host": "0.0.0.0", "port": "6379"        },        "sqlite": { "databasePath": "/database/laravel-echo-server.sqlite"        }    },    "devMode": true,    "host": null,    "port": "2096",    "protocol": "https",    "socketio": {},    "secureOptions": 67108864,    "sslCertPath": "/etc/nginx/certs/mysitecom.pem",    "sslKeyPath": "/etc/nginx/certs/mysitecom.key",    "sslCertChainPath": "",    "sslPassphrase": "",    "subscribers": {        "http": true,        "redis": true    },    "apiOriginAllow": {        "allowCors": true,        "allowOrigin": "*",        "allowMethods": "GET, POST",        "allowHeaders": "Origin, Content-Type, X-Auth-Token, X-Requested-With, Accept, Authorization, X-CSRF-TOKEN, X-Socket-Id"    }}

注意： 对于使用DNS连接的用户，

cloudflare