nginx 反代 响应头未被替换 返回内容正常

配置文件

    proxy_set_header Accept-Encoding "";
	sub_filter "a.aa" "c.cc";
    sub_filter_last_modified on;
    sub_filter_types * ;
    sub_filter_once off;

请求头

Accept
	image/avif,image/webp,*/*
Accept-Encoding
	gzip, deflate, br
Accept-Language
	zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Cache-Control
	no-cache
Connection
	keep-alive
Cookie

Host
	c.cc
Pragma
	no-cache
Referer
	https://c.cc/1.html
Sec-Fetch-Dest
	image
Sec-Fetch-Mode
	no-cors
Sec-Fetch-Site
	same-origin
TE
	trailers
User-Agent

响应头

cache-control
	no-cache
content-length
	0
content-type
	text/html; charset=UTF-8
date
	Sat, 10 Sep 2022 12:43:42 GMT
link
	<https://a.aa/wp-json/>; rel="https://api.w.org/"
location
	https://c.cc/wp-includes/images/w-logo-blue-white-bg.png
server
	nginx
strict-transport-security
	max-age=31536000; includeSubdomains;
X-Firefox-Spdy
	h2
x-redirect-by
	WordPress

网页源代码的返回内容都是正常的 但响应头里面有个 link 会暴露源站地址

如果请求 https://c.cc/favicon.ico 第一次响应是 302 也会携带这个 link 302 后再次返回状态码 200 的时候内容倒是没问题