--with-http_addition_module 需要编译进Nginx

其功能主要在响应前或响应后追加内容

add_before_body 指令 将处理给定子请求后返回的文本添加到响应正文之前

Syntax:

**add_before_body** `_uri_`;

Default:

—

Context:

http, server, location

add_after_body 指令

Syntax:**add_after_body** `_uri_`;
Default:—

Context:http, server, location

addition_types 指令 指定处理的文本类型

Syntax:

**addition_types** `_mime-type_` ...;

Default:

addition_types text/html;

Context:

http, server, location

演示

location / {
                add_before_body /before_action;
                add_after_body /after_action;
                addition_types *;

        }
        location /before_action {
                return 200 "before \n ";
        }
        location /after_action {
                return 200 "after \n";
        }