funcs/func_uri.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2006, Digium, Inc.
   5  *
   6  * Created by Olle E. Johansson, Edvina.net
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief URI encoding / decoding
  22  *
  23  * \author Olle E. Johansson <oej@edvina.net>
  24  *
  25  * \note For now this code only supports 8 bit characters, not unicode,
  26          which we ultimately will need to support.
  27  *
  28  */
  29
  30 #include "asterisk.h"
  31
  32 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  33
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <sys/types.h>
  38
  39 #include "asterisk/module.h"
  40 #include "asterisk/channel.h"
  41 #include "asterisk/pbx.h"
  42 #include "asterisk/logger.h"
  43 #include "asterisk/utils.h"
  44 #include "asterisk/app.h"
  45
  46 /*! \brief uriencode: Encode URL according to RFC 2396 */
  47 static int uriencode(struct ast_channel *chan, char *cmd, char *data,
  48                      char *buf, size_t len)
  49 {
  50         if (ast_strlen_zero(data)) {
  51                 ast_log(LOG_WARNING, "Syntax: URIENCODE(<data>) - missing argument!\n");
  52                 return -1;
  53         }
  54
  55         ast_uri_encode(data, buf, len, 1);
  56
  57         return 0;
  58 }
  59
  60 /*!\brief uridecode: Decode URI according to RFC 2396 */
  61 static int uridecode(struct ast_channel *chan, char *cmd, char *data,
  62                      char *buf, size_t len)
  63 {
  64         if (ast_strlen_zero(data)) {
  65                 ast_log(LOG_WARNING, "Syntax: URIDECODE(<data>) - missing argument!\n");
  66                 return -1;
  67         }
  68
  69         ast_copy_string(buf, data, len);
  70         ast_uri_decode(buf);
  71
  72         return 0;
  73 }
  74
  75 static struct ast_custom_function urldecode_function = {
  76         .name = "URIDECODE",
  77         .synopsis = "Decodes a URI-encoded string according to RFC 2396.",
  78         .syntax = "URIDECODE(<data>)",
  79         .read = uridecode,
  80 };
  81
  82 static struct ast_custom_function urlencode_function = {
  83         .name = "URIENCODE",
  84         .synopsis = "Encodes a string to URI-safe encoding according to RFC 2396.",
  85         .syntax = "URIENCODE(<data>)",
  86         .read = uriencode,
  87 };
  88
  89 static int unload_module(void)
  90 {
  91         return ast_custom_function_unregister(&urldecode_function)
  92                 || ast_custom_function_unregister(&urlencode_function);
  93 }
  94
  95 static int load_module(void)
  96 {
  97         return ast_custom_function_register(&urldecode_function)
  98                 || ast_custom_function_register(&urlencode_function);
  99 }
 100
 101 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "URI encode/decode dialplan functions");