前言

做一个小程序项目，3d多人聊天室互动，有两台服务器，windows系统和contos7
分别用来写小程序逻辑和部署socket.io

由于小程序里面都是https的请求，所以socket.io请求需要从ws（未加密）改成wws（加密）

下面应该是使用nginx反向代码解决这wss访问问题
两个简单问题解决记录

一、socket使用加密访问

由于小程序里面都是https访问，直接访问socket监听的3000端口会报错：

Mixed Content: The page at 'https://xxx/test/index.html' was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint 'ws://xxx:3000/socket.io/?EIO=4&transport=websocket'. This request has been blocked; this endpoint must be available over WSS.

在centos7上面，使用nginx反向代理可以解决（反向代理真的好用！）

一键安装nginx

sudo yum install -y nginx

直接修改默认的配置文件如下：（自备ssl证书）
就是把443端口注释开启，最后加了一个反向代理到本地的3000端口，也就是我socket监听的端口

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;events {worker_connections 1024;
}http {log_format  main  '$remote_addr - $remote_user [$time_local] "$request" ''$status $body_bytes_sent "$http_referer" ''"$http_user_agent" "$http_x_forwarded_for"';access_log  /var/log/nginx/access.log  main;sendfile            on;tcp_nopush          on;tcp_nodelay         on;keepalive_timeout   65;types_hash_max_size 4096;include             /etc/nginx/mime.types;default_type        application/octet-stream;# Load modular configuration files from the /etc/nginx/conf.d directory.# See http://nginx.org/en/docs/ngx_core_module.html#include# for more information.include /etc/nginx/conf.d/*.conf;server {listen       80;listen       [::]:80;server_name  _;root         /usr/share/nginx/html;# Load configuration files for the default server block.include /etc/nginx/default.d/*.conf;error_page 404 /404.html;location = /404.html {}error_page 500 502 503 504 /50x.html;location = /50x.html {}}#Settings for a TLS enabled server.server {listen       443 ssl http2;listen       [::]:443 ssl http2;server_name  _;root         /usr/share/nginx/html;ssl_certificate "/etc/nginx/crt/gbmax.com.cn_bundle.crt";ssl_certificate_key "/etc/nginx/crt/gbmax.com.cn.key";ssl_session_cache shared:SSL:1m;ssl_session_timeout  10m;ssl_ciphers HIGH:!aNULL:!MD5;ssl_prefer_server_ciphers on;# Load configuration files for the default server block.include /etc/nginx/default.d/*.conf;error_page 404 /404.html;location = /40x.html {}error_page 500 502 503 504 /50x.html;location = /50x.html {}location /{add_header 'Access-Control-Allow-Origin' '*';add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';proxy_pass http://127.0.0.1:3000;proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection "Upgrade";proxy_set_header X-Real-IP $remote_addr;}}}

二、nginx反向代理之后socket请求跨域设置失效

本来socket已经配置了跨域了，但是反向代理后依旧还有跨域报错
上面的配置文件已经写了，在反向代理之前设置nginx跨域即可

add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

总结

解决办法就是nginx 监听443端口配置证书，反向代理socket服务

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