处理跨域

忽略上游头部

    # 忽略上游的 Access-Control-Allow-Origin 头部  
    proxy_hide_header Access-Control-Allow-Origin;  

支持全部来源域名

    # 在 Nginx 中添加或覆盖 Access-Control-Allow-Origin 头部  
    # add_header Access-Control-Allow-Origin "你的值";  # 注意：一定要是具体的域名，不能是*
    add_header Access-Control-Allow-Origin $http_origin; # 这样是支持所有来源

只支持某几个域名

 set $cors_origin ""; 
    if ($http_origin ~* "^http://foo.baidu.com$") { 
            set $cors_origin $http_origin; 
    } 
    if ($http_origin ~* "^http://bar.baidu.com$") { 
            set $cors_origin $http_origin; 
    } 
    add_header Access-Control-Allow-Origin $cors_origin; 

处理路径对应

使用rewrite重写路径

    rewrite ^/testapi/api/(.*)$ /api/$1;
    # 或者是  rewrite ^/testapi/(.*)$ /$1;
    proxy_pass https://www.baidu.com;
    # 或者是  proxy_pass https://www.baidu.com/;

其他鉴权请求头

cookie部分

      set $domain "";
      if ($host ~* "(.*)(\..*)(\..*)" ) {
             set $domain $2$3;
      }
      proxy_cookie_domain .baidu.com $domain;
      proxy_set_header Cookie $http_cookie;
      proxy_pass_header Set-Cookie;

其他请求头

        proxy_set_header Host www.baidu.com;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Referer "";

完整location

    location /testapi {
        rewrite ^/testapi/api/(.*)$ /api/$1;
        
        if ($request_method = 'OPTIONS') {
            return 204;
        }
        proxy_pass https://www.baidu.com;

        set $domain "";
        if ($host ~* "(.*)(\..*)(\..*)" ) {
               set $domain $2$3;
        }
        proxy_cookie_domain .baidu.com $domain;
        proxy_set_header Cookie $http_cookie;
        proxy_pass_header Set-Cookie;

        proxy_set_header Host www.baidu.com;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Referer "";

        proxy_hide_header Access-Control-Allow-Origin;

        set $cors_origin ""; 
        if ($http_origin ~* "^http://foo.baidu.com$") { 
            set $cors_origin $http_origin; 
        } 
        if ($http_origin ~* "^http://bar.baidu.com$") { 
            set $cors_origin $http_origin; 
        } 
        add_header Access-Control-Allow-Origin $cors_origin; 
    }