The Rule of nginx location Match

location [ = | ~ | ~* | ^~ ] uri { … }

• '=': 跟url完全相同。
• '^~'或者什么都没有是代表：the whole request uri or only the beginning part of it.
• '~' or '~', the uri part in the directive is a regular expression, with operator ~ for case sensitive match and operator ~ for case insensitive match.