序
本文主要解析一下ngx_http_rewrite_module中的rewrite相关配置。
directives名称 | 默认配置 | 作用域 | 官方说明 | 中文解读 | 模块 |
---|---|---|---|---|---|
break | 无 | server, location, if | Stops processing the current set of ngx_http_rewrite_module directives. | 中断当前的重写 | ngx_http_rewrite_module |
if | 无 | server, location | The specified condition is evaluated. If true, this module directives specified inside the braces are executed, and the request is assigned the configuration inside the if directive. Configurations inside the if directives are inherited from the previous configuration level. | if表达式成立则执行,if代码块里头的配置继承外部的配置; false和0都表示不成立; string比较,相等用=,不相等用!= ; 文件存在用-f,不存在用! -f ; 目录存在用-d,不存在用 ! -d ; 链接存在用-e,不存在用! -e ; 文件可执行用-x,不可执行用! -x | ngx_http_rewrite_module |
return | 无,语法 return code [text]; return code URL; return URL; | server, location, if | Stops processing and returns the specified code to a client. The non-standard code 444 closes a connection without sending a response header. | 停止处理并返回,返回444的话则会关闭连接,连header都不会发送 | ngx_http_rewrite_module |
rewrite | 无,语法 rewrite regex replacement [flag]; | server, location, if | If the specified regular expression matches a request URI, URI is changed as specified in the replacement string. The rewrite directives are executed sequentially in order of their appearance in the configuration file. It is possible to terminate further processing of the directives using flags. If a replacement string starts with “http://”, “https://”, or “$scheme”, the processing stops and the redirect is returned to a client. | last停止匹配,使用重写后的url进行新的匹配; break停止当前的url重写; redirect进行302跳转; permanent进行301跳转 | ngx_http_rewrite_module |
rewrite_log | rewrite_log off; | http, server, location, if | Enables or disables logging of ngx_http_rewrite_module module directives processing results into the error_log at the notice level. | 设置是否在error_log以notice级别开启rewrite的log | ngx_http_rewrite_module |
set | 无,语法 set $variable value; | server, location, if | Sets a value for the specified variable. The value can contain text, variables, and their combination. | 设置变量 | ngx_http_rewrite_module |
uninitialized_variable_warn | uninitialized_variable_warn on; | http, server, location, if | Controls whether warnings about uninitialized variables are logged. | 设置是否打印使用了未初始化变量的log | ngx_http_rewrite_module |
http { # a special log format referencing variables we"ll define later log_format imagelog "[$time_local] " $image_file " "$image_type " " $body_bytes_sent " " $status; # we want to enable rewrite-rule debugging to see if our rule does what we intend rewrite_log on; server { root /home/www; location / { # we specify which logfile should receive the rewriteruledebug messages error_log logs/rewrite.log notice; # our rewrite rule, utilizing captures and positional variables # note the quotes around the regular expression theseare required because we used {} within the expression itself rewrite "^/images/([a-z]{2})/([a-z0-9]{5})/(.*).(png|jpg|gif)$" /data?file=$3.$4; # note that we didn"t use the "last" parameter above; if we had, the variables below would not be set because NGINX would have ended rewrite module processing here we set the variables that are used in the custom log format "imagelog" set $image_file $3; set $image_type $4; } } }doc
ngx_http_rewrite_module
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