以下是请求http://xxx/say/hello时的所有可能情况
| location | proxy_pass | 请求地址 |
|---|---|---|
| /say | http://host/ | http://host//hello |
| /say/ | http://host/ | http://host/hello |
| /say | http://host | http://host/say/hello |
| /say/ | http://host | http://host/say/hello |
| /say | http://host/speak/ | http://host/speak//hello |
| /say/ | http://host/speak/ | http://host/speak/hello |
| /say | http://host/speak | http://host/speak/hello |
| /say/ | http://host/speak | http://host/speakhello |
总结：
- 当proxy_pass为ip:port的形式时，proxy_pass末尾如果加"/"，proxy_pass不拼接location的路径，从location中不匹配的部分开始拼接，若不加"/",proxy_pass会拼接location的路径
- 当proxy_pass为ip:port/xxx的形式时，不管proxy_pass末尾加没加"/"，都不会拼接location的路径，而是从location中不匹配的部分开始拼接