详解Nginx反向代理跨域基本配置与常见误区

server {
  listen 8443; # 监听的端口号
  server_name a.test.com; # 服务器名称
  client_max_body_size 100m;  # 定义读取客户端请求头的超时时间
  ssl on;
  ssl_certificate test.pem;
  ssl_certificate_key test.key;
  ssl_session_timeout 5m;
  ssl_protocols SSLv3 TLSv1.2;
  ssl_ciphers ECDHE-RSA-AES256-SHA384:AES256-SHA256:RC4:HIGH:!MD5:!aNULL:!eNULL:!NULL:!DH:!EDH:!AESGCM;
  ssl_prefer_server_ciphers on;
  location / {
    root /test-static-app; # 静态资源目录
    index index.html index.htm;
    try_files $uri $uri/ /index.html; # 动态解析目录，配合vue的history模式
  }
}

...
location /api {
  proxy_pass https://b.test.com; # 设置代理服务器的协议和地址
  proxy_cookie_domain b.test.com a.test.com; # 修改cookie，针对request和response互相写入cookie
}    
...

proxy_cookie_domain b.test.com a.test.com;

module.exports = (router) => {
 router.get('/api/index/getCmsInfo', async function (ctx, next) {
  // 接口转发
  let result = await superagent.post('https://b.test.com/api/card/home').set(browserMsg)
  // 获取返回的set-cookie，并设置header
  let setCookie = result.headers['set-cookie']
  if (setCookie) {
    ctx.response.header['set-cookie'] = setCookie
  }
  // 返回
  ctx.response.body={
    success: true,
    result: result.body 
  }
 })
}

add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Credentials' "true"; 
add_header Access-Control-Allow-Headers X-Requested-With;

...
location /api {
  #proxy_pass https://b.test.com;
  proxy_pass https://b.test.com/;
}    
...