nginx 模块开发实例

#include <ngx_config.h>
#include <ngx_core.h>
#include <nginx.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;
        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
};


编译此源码的config文件如下:
ngx_addon_name=ngx_http_mytest_module
HTTP_MODULES="$HTTP_MODULES ngx_http_mytest_module"
NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_mytest_module.c"


把此模块编译进nginx:
./configure --prefix=/home/nginx --add-module=/home/dongsy/nginx-1.8.0/ngx_http_mytest_module/

.c文件和 config文件在/home/dongsy/nginx-1.8.0/ngx_http_mytest_module/ 目录下

/home/nginx 为安装目录