Beginner’s Guide (nginx.org)

nginx.pid的作用：記錄nginx的main process的pid，方便kill的調(diào)用；（因?yàn)檎{(diào)用kill需要提供pid）

請(qǐng)求uri：請(qǐng)求uri是不包含query string的uri，比如http://localhost:8080/test/a=1的請(qǐng)求uri指的是/test；nginx通過(guò)請(qǐng)求uri和location進(jìn)行匹配

location的正則：其實(shí)正則就是perl規(guī)范的，只是location的正則需要以~或~*開(kāi)頭

location匹配規(guī)則：所有可以匹配的location中，先選有正則的location，其次再選最長(zhǎng)的location；[ = | ~ | ~* | ^~ | @]是可以包含的前綴，各自的意義見(jiàn)nginx配置location - 簡(jiǎn)書(shū) (jianshu.com)

When nginx selects a location block to serve a request it first checks location directives that specify prefixes, remembering location with the longest prefix, and then checks regular expressions. If there is a match with a regular expression, nginx picks this location or, otherwise, it picks the one remembered earlier.