File apache2-mod_example.c of Package apache2

/* 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 =
    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.
     * If it is, we accept it and do our things, it not, we simply return DECLINED,
     * and Apache will try somewhere else.
    if (!r->handler || strcmp(r->handler, "example-handler")) return (DECLINED);
    // The first thing we will do is write a simple "Hello, world!" back to the client.
    ap_rputs("Hello, world!<br/>\n", r);
    return OK;
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