libsagui-docs/example_httpcookie_8c-example.html

/*                         _

 *   ___  __ _  __ _ _   _(_)

 *  / __|/ _` |/ _` | | | | |

 *  \__ \ (_| | (_| | |_| | |

 *  |___/\__,_|\__, |\__,_|_|

 *             |___/

 *

 * Cross-platform library which helps to develop web servers or frameworks.

 *

 * Copyright (C) 2016-2019 Silvio Clecio <silvioprog@gmail.com>

 *

 * Sagui library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * Sagui library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with Sagui library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */


#include <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include <string.h>

#include <sagui.h>


/* NOTE: Error checking has been omitted to make it clear. */


#define CONTENT_TYPE "text/html; charset=utf-8"

#define BEGIN_PAGE "<html><head><title>Cookies</title></head><body>"

#define END_PAGE "</body></html>"

#define INITIAL_PAGE BEGIN_PAGE "Use F5 to refresh this page ..." END_PAGE

#define COUNT_PAGE BEGIN_PAGE "Refresh number: %d" END_PAGE

#define COOKIE_NAME "refresh_count"


static int strtoint(const char *str) {

  if (!str)

    return 0;

  return (int) strtol(str, NULL, 10);

}


static void req_cb(__SG_UNUSED void *cls, struct sg_httpreq *req,

                   struct sg_httpres *res) {

  struct sg_strmap **cookies;

  char str[100];

  int count;

  if (strcmp(sg_httpreq_path(req), "/favicon.ico") == 0) {

    sg_httpres_send(res, "", "", 204);

    return;

  }

  cookies = sg_httpreq_cookies(req);

  count = cookies ? strtoint(sg_strmap_get(*cookies, COOKIE_NAME)) : 0;

  if (count == 0) {

    snprintf(str, sizeof(str), INITIAL_PAGE);

    count = 1;

  } else {

    snprintf(str, sizeof(str), COUNT_PAGE, count);

    count++;

  }

  sg_httpres_send(res, str, CONTENT_TYPE, 200);

  snprintf(str, sizeof(str), "%d", count);

  sg_httpres_set_cookie(res, COOKIE_NAME, str);

}


int main(int argc, const char *argv[]) {

  struct sg_httpsrv *srv;

  uint16_t port;

  if (argc != 2) {

    printf("%s <PORT>\n", argv[0]);

    return EXIT_FAILURE;

  }

  port = strtol(argv[1], NULL, 10);

  srv = sg_httpsrv_new(req_cb, NULL);

  if (!sg_httpsrv_listen(srv, port, false)) {

    sg_httpsrv_free(srv);

    return EXIT_FAILURE;

  }

  fprintf(stdout, "Server running at http://localhost:%d\n",

          sg_httpsrv_port(srv));

  fflush(stdout);

  getchar();

  sg_httpsrv_free(srv);

  return EXIT_SUCCESS;

}

sg_httpsrv_new
struct sg_httpsrv * sg_httpsrv_new(sg_httpreq_cb cb, void *cls) __attribute__((malloc))

sg_httpres_set_cookie
int sg_httpres_set_cookie(struct sg_httpres *res, const char *name, const char *val)

sg_httpsrv_free
void sg_httpsrv_free(struct sg_httpsrv *srv)

sg_httpreq_cookies
struct sg_strmap ** sg_httpreq_cookies(struct sg_httpreq *req)

sg_httpreq_path
const char * sg_httpreq_path(struct sg_httpreq *req)

sg_httpres_send
#define sg_httpres_send(res, val, content_type, status)
Definition sagui.h:1032

sg_httpsrv_listen
bool sg_httpsrv_listen(struct sg_httpsrv *srv, uint16_t port, bool threaded)

sg_httpsrv_port
uint16_t sg_httpsrv_port(struct sg_httpsrv *srv)

sg_strmap_get
const char * sg_strmap_get(struct sg_strmap *map, const char *name)

sagui.h

sg_httpreq

sg_httpres

sg_httpsrv

sg_strmap