The Rule of nginx location Match

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

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• '=': 跟url彻底相同。
• '^~'或者什么都没有是表明：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.