1、location和proxy_pass都带/,则真实地址不带location匹配目录

location /url/ {
    proxy_pass http://127.0.0.1:8080/;
}
访问地址:www.test.com/url/upload --> http://127.0.0.1:8080/upload

2、location不带/,proxy_pass带/,则真实地址不带location匹配目录但是带 /


location /url {
    proxy_pass http://127.0.0.1:8080/;
}
访问地址: www.test.com/url/upload --> http://127.0.0.1:8080//upload

3、location带/,proxy_pass不带/,则真实地址会带location匹配目录/url/

location /url/ {
    proxy_pass http://127.0.0.1:8080;
}
访问地址: www.test.com/url/upload --> http://127.0.0.1:8080/url/upload

4、location和proxy_pass都不带/,则真实地址会带location匹配目录/url/

location /url {
    proxy_pass http://127.0.0.1:8080;
}
 访问地址: www.test.com/url/upload --> http://127.0.0.1:8080/url/upload

5、location和proxy_pass都带/ ,但 proxy_pass带地址

location /url/ {
    proxy_pass http://127.0.0.1:8080/server/;
}
访问地址: www.test.com/url/upload --> http://127.0.0.1:8080/server/upload

6、location不带/,proxy_pass带/,但 proxy_pass带地址,则真实地址会多个/

location /url {
    proxy_pass http://127.0.0.1:8080/server/;
}
访问地址: www.test.com/url/upload --> http://127.0.0.1:8080/server//upload

7、location带/,proxy_pass不带/,但 proxy_pass带地址,则真实地址会直接连起来

location /url/ {
    proxy_pass http://127.0.0.1:8080/server;
}
访问地址: www.test.com/url/upload --> http://127.0.0.1:8080/serverupload

8、location和proxy_pass都不带/,但 proxy_pass带地址,则真实地址匹配地址会替换location匹配目录

location /url {
    proxy_pass http://127.0.0.1:8080/server;
}
访问地址: www.test.com/url/upload -->​​​​​​​ http://127.0.0.1:8080/server/upload

总结:

1.proxy_pass代理地址端口后有目录(包括 / ),转发后地址:代理地址+访问URL目录部分去除location匹配目录 
2.proxy_pass代理地址端口后无任何内容,转发后地址:代理地址+访问URL目录部