使用 nginx proxy_pass 修改位置标头 [英] Modifying a Location header with nginx proxy_pass

问题描述

我有一个 nginx proxy_pass 设置来将 /api 上的每个请求传递到后端 Tomcat REST 服务.此服务在某些情况下会返回一个 Location 标头，该标头根据请求的类型而变化，例如，Location: http://foo.bar/baz/api/search/1234567 -- baz 部分是因为它托管在 Tomcat 上.

I have an nginx proxy_pass setup to pass every request on /api through to a backend Tomcat REST service. This service in some cases returns a Location header which varies according to the type of request, e.g., Location: http://foo.bar/baz/api/search/1234567 -- the baz part is due to it being hosted on Tomcat.

我当前的配置正确地重写了 foo.bar 主机名，但保持 baz 部分完好无损.我想去掉这个，但 proxy_pass 选项似乎仅限于清除或设置标题的新值.

My current configuration rewrites the foo.bar host name correctly, but leaves the baz part intact. I'd like to strip this, but the proxy_pass options seem to be limited to clearing or setting a new value for the header.

有没有办法在传递给客户端之前动态修改标头，例如使用正则表达式替代?这是我的 nginx 配置:

Is there a way to modify headers dynamically before being passed on to the client, using a regex substitute, for instance? This is my nginx configuration:

location /api {
    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_max_temp_file_size 0;
    client_max_body_size    10m;
    client_body_buffer_size 128k;
    proxy_connect_timeout   90;
    proxy_send_timeout      90;
    proxy_read_timeout      90;
    proxy_buffers           32 4k;
    proxy_redirect off;

    proxy_pass http://foo.bar:8080/baz/api;
}

推荐答案

您也许可以使用正则表达式来修改它，但更好的方法是使用代理重定向:

You may be able to use regexp to modify it but a better way is to use a proxy redirect:

proxy_redirect http://foo.bar/baz/ /;

http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_redirect

foo.bar/baz/ 的任何位置标头都将转到 /

Any Location headers for foo.bar/baz/ will go to /

如果您只想重定向 /baz/api，那也可以.

If you just want to redirect /baz/api, that'll work too.

如果任何重定向也添加了端口，您还需要添加 http://foo.bar:8080/baz/(单独重定向).

If any redirects are also adding the port, you'll need to add http://foo.bar:8080/baz/ as well (separate redirect).

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