nginx proxy_redirect 作用

准备环境 springboot /redirect controller

curl http://localhost:10080/redirect -vv
*   Trying ::1:10080...
* Connected to localhost (::1) port 10080 (#0)
> GET /redirect HTTP/1.1
> Host: localhost:10080
> User-Agent: curl/7.76.1
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 302 
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache
< Expires: 0
< X-Frame-Options: DENY
< Location: http://localhost:10080/ip
< Content-Length: 0
< Date: Wed, 26 May 2021 05:55:45 GMT
< 
* Connection #0 to host localhost left intact

1. 默认配置，即proxy_redirect default;

location / {
                proxy_pass http://localhost:10080/;
        }

效果

curl -vv http://localhost/redirect
*   Trying ::1:80...
* connect to ::1 port 80 failed: 拒绝连接
*   Trying 127.0.0.1:80...
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET /redirect HTTP/1.1
> Host: localhost
> User-Agent: curl/7.76.1
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 302 
< Server: nginx/1.19.3
< Date: Wed, 26 May 2021 05:57:02 GMT
< Content-Length: 0
< Location: http://localhost/ip
< Connection: keep-alive
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache
< Expires: 0
< X-Frame-Options: DENY
< 
* Connection #0 to host localhost left intact

2. proxy_redirect default;

location / {
                proxy_pass http://localhost:10080/;
                proxy_redirect default;
        }

注意，proxy_redirect default必须在proxy_pass下方配置

效果

curl -vv http://localhost/redirect
*   Trying ::1:80...
* connect to ::1 port 80 failed: 拒绝连接
*   Trying 127.0.0.1:80...
* Connected to localhost (127.0.0.1) port 80 (#0)
> GET /redirect HTTP/1.1
> Host: localhost
> User-Agent: curl/7.76.1
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 302 
< Server: nginx/1.19.3
< Date: Wed, 26 May 2021 06:02:20 GMT
< Content-Length: 0
< Location: http://localhost/ip
< Connection: keep-alive
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache
< Expires: 0
< X-Frame-Options: DENY
< 
* Connection #0 to host localhost left intact

与方案1等同

3. proxy_redirect off;

location / {
                proxy_pass http://localhost:10080/;
                proxy_redirect off;
        }

效果

curl http://localhost:10080/redirect -vv
*   Trying ::1:10080...
* Connected to localhost (::1) port 10080 (#0)
> GET /redirect HTTP/1.1
> Host: localhost:10080
> User-Agent: curl/7.76.1
> Accept: */*
> 
* Mark bundle as not supporting multiuse
< HTTP/1.1 302 
< X-Content-Type-Options: nosniff
< X-XSS-Protection: 1; mode=block
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache
< Expires: 0
< X-Frame-Options: DENY
< Location: http://localhost:10080/ip
< Content-Length: 0
< Date: Wed, 26 May 2021 06:03:34 GMT
< 
* Connection #0 to host localhost left intact