Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "zbxexpr.h"

​

#include "zbxnum.h"

​

/******************************************************************************

 *                                                                            *

 * Purpose: replaces unsafe characters with a '%' followed by two hexadecimal *

 *          digits (the only allowed exception is a space character that can  *

 *          be replaced with a plus (+) sign or with %20).to url encode       *

 *                                                                            *

 * Parameters:  source  - [IN] the value to encode                            *

 *              result  - [OUT] encoded string                                *

 *                                                                            *

 ******************************************************************************/

void    zbx_url_encode(const char *source, char **result)

{

    char        *target, *buffer;

    const char  *hex = "0123456789ABCDEF";

​

    buffer = (char *)zbx_malloc(NULL, strlen(source) * 3 + 1);

    target = buffer;

​

    while ('\0' != *source)

    {

        if (0 == isalnum(*source) && NULL == strchr("-._~", *source))

        {

            /* Percent-encoding */

            *target++ = '%';

            *target++ = hex[(unsigned char)*source >> 4];

            *target++ = hex[(unsigned char)*source & 15];

        }

        else

            *target++ = *source;

​

        source++;

    }

​

    *target = '\0';

    zbx_free(*result);

    *result = buffer;

}

​

/******************************************************************************

 *                                                                            *

 * Purpose: replaces URL escape sequences ('+' or '%' followed by two         *

 *          hexadecimal digits) with matching characters.                     *

 *                                                                            *

 * Parameters:  source  - [IN] the value to decode                            *

 *              result  - [OUT] decoded string                                *