我如何将非标准应用程序特定的 header 从 nginx 转发到我的应用程序服务器？

Question

I have not been able to pass an application specific header to my application that is running on uWSGI and Flask

This is from my nginx.conf

                proxy_pass http://localhost:5000/;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $host;
                proxy_set_header X-NginX-Proxy true;
                proxy_pass_request_headers on;
                proxy_set_header $HTTP_Chart-Type $http_chart_type;
        }

These are my headers from chrome:

Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Cache-Control: no-cache
chart_type: line

I am trying to pass the chart_type header to my backend.

Thanks

Answer 1

The default value of proxy_pass_request_headers is on , so there should be no need to explicitly set it (unless it is turned off in the config somewhere and that has an effect on your configuration).

With the default setting ( on ), Nginx passes all headers to the backend, so you don't need any special configuration to pass a custom header (assuming your http_chart_type is a custom header).

Your problems passing the http_chart_type header from Nginx to the backend is likely related to Nginx by default not allowing header names with underscore. See https://stackoverflow.com/a/74798560/3571 .