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分类: C/C++

2012-10-30 16:31:07

最近又开始写apache的module,2.4的module和1.3,大不相同,又要重新学习了。
根据apache的文档写出了例子
我们写hello ip,不写hello world
mod_example_1.c
/* Include the required headers from httpd */
#include "httpd.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_request.h"
/* Define prototypes of our functions in this module */
static void register_hooks(apr_pool_t *pool);
static int example_handler(request_rec *r);
/* Define our module as an entity and assign a function for registering hooks  */
module AP_MODULE_DECLARE_DATA   example_module =
{
    STANDARD20_MODULE_STUFF,
    NULL,            // Per-directory configuration handler
    NULL,            // Merge handler for per-directory configurations
    NULL,            // Per-server configuration handler
    NULL,            // Merge handler for per-server configurations
    NULL,            // Any directives we may have for httpd
    register_hooks   // Our hook registering function
};

/* register_hooks: Adds a hook to the httpd process */
static void register_hooks(apr_pool_t *pool)
{
   
    /* Hook the request handler */
    ap_hook_handler(example_handler, NULL, NULL, APR_HOOK_LAST);
}
/* The handler function for our module.
 * This is where all the fun happens!
 */
static int example_handler(request_rec *r)
{
    /* First off, we need to check if this is a call for the "example-handler" handler.
     * If it is, we accept it and do our things, if not, we simply return DECLINED,
     * and the server will try somewhere else.
     */
    if (!r->handler || strcmp(r->handler, "example-handler")) return (DECLINED);
   
    /* Now that we are handling this request, we'll write out "Hello, world!" to the client.
     * To do so, we must first set the appropriate content type, followed by our output.
     */
    ap_set_content_type(r, "text/html");
    ap_rprintf(r, "Hello, %s!", r->useragent_ip);
   
    /* Lastly, we must tell the server that we took care of this request and everything went fine.
     * We do so by simply returning the value OK to the server.
     */
    return OK;
}
使用apache目录下bin目录
 ./apxs -a -i  -c /study/apache/mod_example_1.c
编译不用考虑路径和库
然后修改conf下httpd.conf
应该会自动添加
LoadModule example_module     modules/mod_example_1.so
中添加
 AddHandler example-handler .sum
有点初学servlet的感觉了
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