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/* Apr */
/* Include the required headers from httpd */
#include "httpd.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_config.h"
#include "http_request.h"
#include "http_log.h"
/* Include the required header from hiredis */
#include "hiredis/hiredis.h"
/* Define prototypes of our functions in this module */
static void register_hooks(apr_pool_t *pool);
static int statx_handler(request_rec *r);
/* Define our module as an entity and assign a function for registering hooks */
module AP_MODULE_DECLARE_DATA statx_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(statx_handler, NULL, NULL, APR_HOOK_LAST);
/* The handler function for our module.
* This is where all the fun happens!
static int statx_handler(request_rec *r)
redisContext *redisContext;
redisReply *reply;
apr_table_t *GET;
struct timeval timeout = { 1, 500000 }; // 1.5 seconds
/* First off, we need to check if this is a call for the "statx" 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, "statx-handler")) return (DECLINED);
//ap_set_content_type(r, "text/html");
//ap_rputs("<!DOCTYPE html>\n", r);
//ap_rputs("<html>\n", r);
//ap_rputs("<head>\n", r);
//ap_rputs("<title>Connecting to redis...</title>\n", r);
//ap_rputs("</head>\n", r);
//ap_rputs("<body>\n", r);
//ap_rputs("Connecting to redis...<br>\n", r);
// Getting a redis context, if we fall here we return directly (for now)
//redisContext = redisConnectWithTimeout((char*)"", 6379, timeout);
redisContext = redisConnectUnix((char*)"/tmp/redis.sock");
if (redisContext == NULL || redisContext->err) {
if (redisContext) {
//ap_rputs("Connection error: ", r);
//ap_rputs(redisContext->errstr, r);
//ap_rputs("\n", r);
} else {
//ap_rputs("Connection error: can't allocate redis context\n", r);
ap_log_error_(APLOG_MARK, APLOG_ERR, 0, r->server,
"Cannot connect to redis server");
// Testing if the server is answering to commands.
reply = redisCommand(redisContext, "PING");
if(reply == NULL) {
ap_log_error_(APLOG_MARK, APLOG_ERR, 0, r->server,
"Redis server not responding!");
//ap_rprintf(r, "Redis ping answer: %s", reply->str);
/* If we were reached through a GET or a POST request, be happy, else sad. */
if ( strcmp(r->method, "GET") ) {
//ap_rputs("You did not use POST or GET, that makes us sad :(<br/>", r);
return OK;
// Let's parse the GET string
ap_args_to_table(r, &GET);
/* Get the "incr" key from the query string, if any. */
const char *incr = apr_table_get(GET, "incr");
//ap_rprintf(r, "incr value: %s", incr);
if(incr) {
redisCommand(redisContext, "INCR %s", incr);
//ap_rputs("</body>\n", r);
//ap_rputs("</html>\n", r);
// Disconnect from redis server.
if(redisContext) {
return OK;