如何在proxy_pass中设置内容类型？

Question

在网站上流量通过http传输到位置/实例我们需要使用SSL和https来确保流量安全.当重定向到https时,请求内容类型是"text/xml",当它实际应该是"application/json"时.我们应该在代理头中明确设置"application/json"吗？我们在http配置中尝试过add_header Content-type"application/json",但没有什么区别.我们做错了什么？

Http配置:

location /instance {
proxy_pass https://instancehost:9443/instance;
proxy_redirect http://localhost.com https://localhost.com;
proxy_set_header X-xmgr-proxy-domain http://localhost.com:80;
proxy_set_header X-xmgr-proxy /instance;
proxy_set_header Access-Control-Allow-Origin "*";
proxy_set_header Access-Control-Allow-Headers "Origin, X-Requested-With,       Content-Type, Accept";
proxy_ssl_certificate /data/nginx/certs/abc.crt;
proxy_ssl_certificate_key /data/nginx/certs/abc.key;
proxy_ssl_trusted_certificate /etc/pki/tls/certs/abc-bundle.crt;
proxy_ssl_protocols SSLv2 SSLv3 TLSv1 TLSv1.1 TLSv1.2;
proxy_hide_header Content-Type;
add_header Content-type "application/json"
}

在标头中设置内容类型不起作用,因为我们仍然收到204错误.

https配置:

location /instance {
proxy_pass           https://instancehost.com:9443/instance;
proxy_set_header     X-xmgr-proxy-domain https://localhost.com:443;
proxy_set_header     X-xmgr-proxy /instance;
proxy_set_header     Access-Control-Allow-Origin "*";
proxy_set_header     Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept";
proxy_ssl_certificate /data/nginx/certs/abc.crt;
proxy_ssl_certificate_key /data/nginx/certs/abc.key;

}

Answer 1

我认为这里的问题是您在执行add_header并且add_header似乎将该标头添加到响应中（当请求从后端返回到客户端时），并且您想要为后端进行设置。

Syntax:     add_header name value [always];
Default:    —
Context:    http, server, location, if in location
Adds the specified field to a response header provided that the response code equals 200, 201, 204, 206, 301, 302, 303, 304, or 307. A value can contain variables. 

你应该在conf中这一行

proxy_set_header content-type "application/json";

所有proxy_ *将为请求设置（从客户端到后端）

语法：proxy_set_header字段值；默认：

proxy_set_header主机$ proxy_host;

proxy_set_header Connection close;
Context:    http, server, location

Allows redefining or appending fields to the request header passed to the proxied server. The value can contain text, variables, and their combinations. These directives are inherited from the previous level if and only if there are no proxy_set_header directives defined on the current level. By default, only two fields are redefined: