【Nginx模块编写】编写第一个Nginx模块

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运营研发团队 季伟滨
模块名：ngx_http_jiweibin_module
1、建立模块源码目录
mkdir /data/code/c/nginx-1.6.2/src/plugin
2、新建 config 文件
vim /data/code/c/nginx-1.6.2/src/plugin/config，写入如下配置：
ngx_addon_name=ngx_http_jiweibin_module
HTTP_MODULES=”$HTTP_MODULES ngx_http_jiweibin_module”
NGX_ADDON_SRCS=”$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_jiweibin_module.c”
3、新建 ngx_http_jiweibin_module.c
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>

static char *ngx_http_jiweibin_cmd_set(ngx_conf_t *cf,ngx_command_t *cmd,void *conf);
static ngx_int_t ngx_http_jiweibin_handler(ngx_http_request_t *r);

static ngx_command_t ngx_http_jiweibin_commands[] = {
{
ngx_string(“jiweibin”),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_NOARGS,
ngx_http_jiweibin_cmd_set,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL
},
ngx_null_command
};

static char * ngx_http_jiweibin_cmd_set(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_jiweibin_handler;
return NGX_CONF_OK;
}
static ngx_http_module_t ngx_http_jiweibin_module_ctx = {
NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
};

ngx_module_t ngx_http_jiweibin_module = {
NGX_MODULE_V1,
&ngx_http_jiweibin_module_ctx,
ngx_http_jiweibin_commands,
NGX_HTTP_MODULE,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NGX_MODULE_V1_PADDING
};
static ngx_int_t ngx_http_jiweibin_handler(ngx_http_request_t *r){
if(!(r->method & (NGX_HTTP_GET|NGX_HTTP_POST))){
return NGX_HTTP_NOT_ALLOWED;
}
ngx_int_t rc = ngx_http_discard_request_body(r);
if(rc != NGX_OK){
return rc;
}
ngx_str_t content_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 = content_type;
rc = ngx_http_send_header(r);
if(rc == NGX_ERROR || rc > NGX_OK){
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);
}
4、configure
cd /data/code/c/nginx-1.6.2

./configure –prefix=/home/xiaoju/nginx-jiweibin –add-module=/data/code/c/nginx-1.6.2/src/plugin/
5、make & make install

6、配置 nginx

7、杀死旧的 nginx 进程

8、启动新编译的带有插件的 nginx
/home/xiaoju/nginx-jiweibin/sbin/nginx -c /home/xiaoju/nginx-jiweibin/conf/nginx.conf

9、验证自己写的插件
http://10.179.195.72:8080/hello