Nginx编写HTTP模块：第一个Nginx HTTP模块 “Hello World!”

写一个Nginx的http模块，当向Nginx发送请求时，Nginx返回“Hello World!”

一、代码

        文件名：ngx_http_mytest_module.c

#include <ngx_config.h>#include <ngx_core.h>#include <ngx_event.h>#include <ngx_http.h>static ngx_int_t ngx_http_mytest_handler(ngx_http_request_t *r){if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD)))return NGX_HTTP_NOT_ALLOWED;ngx_int_t rc = ngx_http_discard_request_body(r);if (rc != NGX_OK)return rc;ngx_str_t type = ngx_string("text/plain");ngx_str_t response = ngx_string("Hello World!");r->headers_out.status = NGX_HTTP_OK;r->headers_out.content_length_n = response.len;r->headers_out.content_type = type;rc = ngx_http_send_header(r);if (rc == NGX_ERROR || rc > NGX_OK || r->header_only)return rc;ngx_buf_t *b = ngx_create_temp_buf(r->pool, response.len);if (b == NULL)return NGX_HTTP_INTERNAL_SERVER_ERROR;ngx_memcpy(b->pos, response.data, response.len);b->last = b->pos + response.len;b->last_buf = 1;ngx_chain_t out;out.buf = b;out.next = NULL;return ngx_http_output_filter(r, &out);}static char* ngx_http_mytest(ngx_conf_t *cf, ngx_command_t *cmd, void *conf){ngx_http_core_loc_conf_t *clcf;clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);clcf->handler = ngx_http_mytest_handler;return NGX_CONF_OK;}static ngx_command_t ngx_http_mytest_commands[] = {{ngx_string("mytest"),NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_HTTP_LMT_CONF | NGX_CONF_NOARGS,ngx_http_mytest,NGX_HTTP_LOC_CONF_OFFSET,0,NULL},ngx_null_command};static ngx_http_module_t ngx_http_mytest_module_ctx = {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,};ngx_module_t ngx_http_mytest_module = {NGX_MODULE_V1,&ngx_http_mytest_module_ctx,ngx_http_mytest_commands,NGX_HTTP_MODULE,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NGX_MODULE_V1_PADDING};

二、将代码编译进Nginx

2.1. 将代码放到Nginx源码目录下

        nginx源码目录为：/opt/nginx-1.5.4

        在/opt/nginx-1.5.4/src下新建目录mytest，将代码放到该目录下。

2.2. 在mytest目录下编写文件config：

ngx_addon_name=ngx_http_mytest_moduleHTTP_MODULES="$HTTP_MODULES ngx_http_mytest_module"NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_mytest_module.c"

2.3. configure时添加自定义模块的路径：

        ./configure --add-module=/opt/nginx-1.5.4/src/mytest

2.4. 编译安装nginx

        make

        make install

三、运行Nginx

Nginx默认安装到目录：/usr/local/nginx

3.1 修改配置文件

        usr/local/nginx/conf/nginx.conf

3.2 运行Nginx

        /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

四、结果

用浏览器访问Nginx：直接输入部署Nginx的机器IP地址

参考资料：

        《深入理解Nginx：模块开发与架构解析》第三章 开发一个简单的HTTP模块

        【Nginx】开发一个简单的HTTP模块：http://www.tuicool.com/articles/aAR3uu