配置准备
正向代理，指的是通过代理服务器 代理浏览器/客户端去重定向请求访问到目标服务器 的一种代理服务。
正向代理服务的特点是代理服务器 代理的对象是浏览器/客户端，也就是对于目标服务器 来说浏览器/客户端是隐藏的。
nginx默认支持正向代理http，不支持https
nginx官方并不支持直接转发https请求，nginx支持https需要ngx_http_proxy_connect_module模块。github上开源了模块 https://github.com/chobits/ngx_http_proxy_connect_module。不过维护的ngx_http_proxy_connect_module模块的补丁也是有nginx版本限制的（目前维护了1.4.x~1.19.x版本）
可以在REDEME.md的Select patch中查看nginx版本和模块的对应关系
nginx版本和正向代理https的模块的对应关系
| nginx version | enable REWRITE phase | patch |
|---|---|---|
| 1.4.x ~ 1.12.x | NO | proxy_connect.patch |
| 1.4.x ~ 1.12.x | YES | proxy_connect_rewrite.patch |
| 1.13.x ~ 1.14.x | NO | proxy_connect_1014.patch |
| 1.13.x ~ 1.14.x | YES | proxy_connect_rewrite_1014.patch |
| 1.15.2 | YES | proxy_connect_rewrite_1015.patch |
| 1.15.4 ~ 1.16.x | YES | proxy_connect_rewrite_101504.patch |
| 1.17.x ~ 1.18.0 | YES | proxy_connect_rewrite_1018.patch |
| 1.19.x ~ 1.21.0 | YES | proxy_connect_rewrite_1018.patch |
| 1.21.1 ~ 1.22.0 | YES | proxy_connect_rewrite_102101.patch |
ls /root/ngx_http_proxy_connect_module/patch proxy_connect_1014.patch proxy_connect_rewrite_1015.patch proxy_connect.patch proxy_connect_rewrite_1018.patch proxy_connect_rewrite_1014.patch proxy_connect_rewrite_102101.patch proxy_connect_rewrite_101504.patch proxy_connect_rewrite.patch
github上开源了模块 https://github.com/chobits/ngx_http_proxy_connect_module
此处用的是nginx-1.17.6，对应proxy_connect_rewrite_1018.patch
配置nginx正向代理
下载后上传到服务器
ls ngx_http_proxy_connect_module-master.zip nginx-1.17.6.tar.gz
解压nginx，解压模块并重命名
tar xf nginx-1.17.6.tar.gz unzip ngx_http_proxy_connect_module-master.zip mv ngx_http_proxy_connect_module-master ngx_http_proxy_connect_module ls ngx_http_proxy_connect_module nginx-1.17.6 ngx_http_proxy_connect_module-master.zip nginx-1.17.6.tar.gz
安装nginx
安装源码编译工具包，nginx依赖包
yum -y install make gcc openssl openssl-devel pcre-devel zlib zlib-devel
进入nginx解压后的目录
cd nginx-1.17.6 ./configure make && make install
使用正向代理https的模块
查看nginx-1.17.6对应的https模块的具体位置
ls /root/ngx_http_proxy_connect_module/patch/proxy_connect_rewrite_1018.patch
导入模块，再次编译安装
patch -p1 < /root/ngx_http_proxy_connect_module/patch/proxy_connect_rewrite_1018.patch ./configure --add-module=/root/ngx_http_proxy_connect_module make && make install
配置正向代理
nginx默认安装在/usr/local/nginx/
cd /usr/local/nginx/
修改配置文件
vim conf/nginx.conf
在 #gzip on; 下添加配置
#正向代理转发http请求
server {
#指定DNS服务器IP地址
resolver 114.114.114.114;
#监听80端口，http默认端口80
listen 80;
#服务器IP或域名
server_name localhost;
#正向代理转发http请求
location / {
proxy_pass http://$host$request_uri;
proxy_set_header HOST $host;
proxy_buffers 256 4k;
proxy_max_temp_file_size 0k;
proxy_connect_timeout 30;
proxy_send_timeout 60;
proxy_read_timeout 60;
proxy_next_upstream error timeout invalid_header http_502;
}
}
#正向代理转发https请求
server {
#指定DNS服务器IP地址
resolver 114.114.114.114;
#监听443端口，https默认端口443
listen 443;
#正向代理转发https请求
proxy_connect;
proxy_connect_allow 443 563;
proxy_connect_connect_timeout 10s;
proxy_connect_read_timeout 10s;
proxy_connect_send_timeout 10s;
location / {
proxy_pass http://$host;
proxy_set_header Host $host;
}
}
检查配置文件是否有错误sbin/nginx -t
创建nginx用户，用来运行nginx
useradd nginx
启动服务
sbin/nginx
验证正向代理
curl -I http://www.baidu.com/ -v -x 127.0.0.1:80 curl -I https://www.baidu.com/ -v -x 127.0.0.1:443
验证正向代理http 200 ok
curl -I http://www.baidu.com/ -v -x 127.0.0.1:80 * About to connect() to proxy 127.0.0.1 port 80 (#0) * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 80 (#0) > HEAD http://www.baidu.com/ HTTP/1.1 > User-Agent: curl/7.29.0 > Host: www.baidu.com > Accept: */* > Proxy-Connection: Keep-Alive > < HTTP/1.1 200 OK HTTP/1.1 200 OK < Server: nginx/1.17.6 Server: nginx/1.17.6 < Date: Sun, 28 Aug 2022 02:05:33 GMT Date: Sun, 28 Aug 2022 02:05:33 GMT < Content-Type: text/html Content-Type: text/html < Content-Length: 277 Content-Length: 277 < Connection: keep-alive Connection: keep-alive < Accept-Ranges: bytes Accept-Ranges: bytes < Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform < Etag: "575e1f7c-115" Etag: "575e1f7c-115" < Last-Modified: Mon, 13 Jun 2016 02:50:36 GMT Last-Modified: Mon, 13 Jun 2016 02:50:36 GMT < Pragma: no-cache Pragma: no-cache < * Connection #0 to host 127.0.0.1 left intact
验证正向代理https 200 ok
curl -I https://www.baidu.com/ -v -x 127.0.0.1:443 * About to connect() to proxy 127.0.0.1 port 443 (#0) * Trying 127.0.0.1... * Connected to 127.0.0.1 (127.0.0.1) port 443 (#0) * Establish HTTP proxy tunnel to www.baidu.com:443 > CONNECT www.baidu.com:443 HTTP/1.1 > Host: www.baidu.com:443 > User-Agent: curl/7.29.0 > Proxy-Connection: Keep-Alive > < HTTP/1.1 200 Connection Established HTTP/1.1 200 Connection Established < Proxy-agent: nginx Proxy-agent: nginx < * Proxy replied OK to CONNECT request * Initializing NSS with certpath: sql:/etc/pki/nssdb * CAfile: /etc/pki/tls/certs/ca-bundle.crt CApath: none * SSL connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 * Server certificate: * subject: CN=baidu.com,O="Beijing Baidu Netcom Science Technology Co., Ltd",OU=service operation department,L=beijing,ST=beijing,C=CN * start date: 7月 05 05:16:02 2022 GMT * expire date: 8月 06 05:16:01 2023 GMT * common name: baidu.com * issuer: CN=GlobalSign RSA OV SSL CA 2018,O=GlobalSign nv-sa,C=BE > HEAD / HTTP/1.1 > User-Agent: curl/7.29.0 > Host: www.baidu.com > Accept: */* > < HTTP/1.1 200 OK HTTP/1.1 200 OK < Accept-Ranges: bytes Accept-Ranges: bytes < Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform < Connection: keep-alive Connection: keep-alive < Content-Length: 277 Content-Length: 277 < Content-Type: text/html Content-Type: text/html < Date: Sun, 28 Aug 2022 02:05:50 GMT Date: Sun, 28 Aug 2022 02:05:50 GMT < Etag: "575e1f7c-115" Etag: "575e1f7c-115" < Last-Modified: Mon, 13 Jun 2016 02:50:36 GMT Last-Modified: Mon, 13 Jun 2016 02:50:36 GMT < Pragma: no-cache Pragma: no-cache < Server: bfe/1.0.8.18 Server: bfe/1.0.8.18 < * Connection #0 to host 127.0.0.1 left intact
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