Nginx模块讲解_http_sub_module

Nginx模块讲解_http_sub_module

1、http_sub_module详解

(1)http_sub_module作用

            Nginx模块讲解_http_sub_module_第1张图片

(2)举例    

    location / {
        sub_filter '

2、sub语法

(1)sub_filter语法

Syntax:

sub_filter string replacement;

Default:

Context:

http,server,location

 

语法解释:

sub_filter string replacement;

string 表示被替换的字符串

replacement 表示替换字符串

Sets a string to replace and a replacement string. The string to replace is matched ignoring the case. The string to replace (1.9.4) and replacement string can contain variables. Several sub_filter directives can be specified on one configuration level (1.9.4). These directives are inherited from the previous level if and only if there are no sub_filter directives defined on the current level.

 

(2)sub_filter_last_modified语法

Syntax:

sub_filter_last_modified on | off;

Default:

sub_filter_last_modified off;

Context:

http,server,location

This directive appeared in version 1.5.1.

语法解释:

sub_filter_last_modified on 表示允许在替换期间保留原始响应中的“Last-Modified”头字段,以便于响应缓存。

Allows preserving the “Last-Modified” header field from the original response during replacement to facilitate response caching.

By default, the header field is removed as contents of the response are modified during processing.

 

(3)sub_filter_once语法

Syntax:

sub_filter_once on | off;

Default:

sub_filter_once on;

Context:

http,server,location

 

语法解释:

sub_filter_once on 表示只替换第一次匹配的字符串

Indicates whether to look for each string to replace once or repeatedly.

 

(4)sub_filter_types语法

Syntax:

sub_filter_types mime-type ...;

Default:

sub_filter_types text/html;

Context:

http,server,location

 

语法解释:

sub_filter_types text/html 表示替换文件类型,“*”表示匹配所有MIME类型

Enables string replacement in responses with the specified MIME types in addition to “text/html”. The special value “*” matches any MIME type (0.8.29).

 

3、sub_filter配置

(1)HTTP内容替换

        Nginx模块讲解_http_sub_module_第2张图片

(2)server1.html修改

        Nginx模块讲解_http_sub_module_第3张图片

4、验证sub_filter配置是否生效

(1)验证sub_filter配置是否生效

        此时发现,只有第一个匹配的字符串被替换了;

        原因:sub_filter_once默认配置为on

         Nginx模块讲解_http_sub_module_第4张图片

(2)显示关闭sub_filter_once配置

        Nginx模块讲解_http_sub_module_第5张图片

(3)验证sub_filter_once配置是否生效

        sub_filter_once off配置生效,所有的匹配到的字符串全部被替换:

        Nginx模块讲解_http_sub_module_第6张图片

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