Nginx得知——Hello World模

Hello World HTTP模

1.构造config

ngx_addon_name=ngx_http_mytest_module

HTTP_MODULES="$HTTP_MODULESngx_http_mytest_module"

NGX_ADDON_SRCS="$NGX_ADDON_SRCS$ngx_addon_dir/ngx_http_mytest_module.c"

2.在ngx_http_mytest_module.c中定义mytest模块

#include<ngx_config.h>

#include<ngx_core.h>

#include<ngx_http.h>

 

static ngx_int_t ngx_http_mytest_handler(ngx_http_request_t* r);

static char* ngx_http_mytest(ngx_conf_t* cf, ngx_command_t* cmd, void* conf);

 //用于定义模块的配置文件參数

static ngx_command_t ngx_http_mytest_commonds[] = {

         { 

                   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

};

 
//指向ngx_http_module接口（HTTP框架要求）
static ngx_http_module ngx_http_mytest_module_ctx = {

         NULL,

         NULL,

         NULL,

         NULL,

         NULL,

         NULL,

         NULL,

         NULL

};

 

 
//定义mytest模块
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

};

 <span style="font-family:Calibri;">//当在某个配置块中出现mytest配置项时。nginx会调用ngx_http_mytest方法
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;

}
</span>
//在这里处理用户请求，并发送响应
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;

         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);

}

3.在ngx.conf中http里面默认的server中增加例如以下配置

location /test{

mytest;

}

4.编译安装nginx

./configure --add-module=/home/chen123/nginx/exp2 黄色区域为config和ngx_http_mytest_module.c的安装文件夹)

make

sudo make install

5.启动nginx

sudo /usr/local/nginx/sbin/nginx