nginx CORS 在代理传递时:跨源请求被阻止:同源策略不允许读取远程资源

nginx CORS 在代理传递时:跨源请求被阻止:同源策略不允许读取远程资源

我正在将 API 从一个子域移动到另一个子域,而不会影响已在运行的应用程序。我在 nginx 上配置了三台服务器,例如:

原始 API 服务器:

server {
listen       80;
server_name  example.com;

root  /var/www/example/;

index index.php index.html index.htm;
try_files $uri $uri/ /index.php?$args;

add_header 'Access-Control-Allow-Origin' '*';

location / {
   try_files $uri $uri/ /index.php?$args;
}

 location ~*/api/([a-zA-Z0-9_]+) {
    proxy_pass      http://127.0.0.1:4343/api/$1;
    proxy_read_timeout 60s;

    proxy_set_header          Host            $host;
    proxy_set_header          X-Real-IP       $remote_addr;
    proxy_set_header          X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header 'Access-Control-Allow-Origin' '*';
    proxy_set_header 'Access-Control-Allow-Credentials' true;
 }
...
}

代理通过的服务器:

server {
listen 4343;
server_name _;

root  /var/www/exampleapi/;

index index.php index.html index.htm;
try_files $uri $uri/ /index.php?$args;

add_header 'Access-Control-Allow-Origin' '*';

location / {
   try_files $uri $uri/ /index.php?$args;
}
...
}

AJAX 调用在旧 API 上运行良好,但对于新的 API,我在 FF 上收到错误:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://example.com/api/startup. (Reason: CORS header 'Access-Control-Allow-Origin' does not match '*, *').

在 Safari 上:

XMLHttpRequest cannot load https://example.com/api/startup. Origin https://myclient.com is not allowed by Access-Control-Allow-Origin.

新旧 API 上的 Curling 显示:

HTTP/1.1 200 OK
Access-Control-Allow-Origin: *

我该如何解决这个问题?

答案1

解决方案是不要为代理传递服务器添加 CORS 的 add_header,因为这会重复标头,或者使用 set_header

代理通过的服务器:

server {
listen 4343;
server_name _;

root  /var/www/exampleapi/;

index index.php index.html index.htm;
try_files $uri $uri/ /index.php?$args;

location / {
   try_files $uri $uri/ /index.php?$args;
}
...
}

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