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 "http.h"

​

#include "../sysinfo.h"

#include "zbxstr.h"

#include "zbxnum.h"

#include "zbxtime.h"

#include "zbxregexp.h"

#include "zbxhttp.h"

#include "zbxcomms.h"

#include "zbxcurl.h"

​

#define HTTP_SCHEME_STR     "http://"

​

#ifndef HAVE_LIBCURL

​

#define ZBX_MAX_WEBPAGE_SIZE    (1 * 1024 * 1024)

​

#else

​

#define HTTPS_SCHEME_STR    "https://"

​

#endif

​

static int  detect_url(const char *host)

{

    char    *p;

    int ret = FAIL;

​

    if (NULL != strpbrk(host, "/@#?[]"))

        return SUCCEED;

​

    if (NULL != (p = strchr(host, ':')) && NULL == strchr(++p, ':'))

        ret = SUCCEED;

​

    return ret;

}

​

static int  process_url(const char *host, const char *port, const char *path, char **url, char **error)

{

    char    *p, *delim;

    int scheme_found = 0;

​

    /* port and path parameters must be empty */

    if ((NULL != port && '\0' != *port) || (NULL != path && '\0' != *path))

    {

        *error = zbx_strdup(*error,

                "Parameters \"path\" and \"port\" must be empty if URL is specified in \"host\".");

        return FAIL;

    }

​

    /* allow HTTP(S) scheme only */

#ifdef HAVE_LIBCURL

    if (0 == zbx_strncasecmp(host, HTTP_SCHEME_STR, ZBX_CONST_STRLEN(HTTP_SCHEME_STR)) ||

            0 == zbx_strncasecmp(host, HTTPS_SCHEME_STR, ZBX_CONST_STRLEN(HTTPS_SCHEME_STR)))

#else

    if (0 == zbx_strncasecmp(host, HTTP_SCHEME_STR, ZBX_CONST_STRLEN(HTTP_SCHEME_STR)))

#endif

    {

        scheme_found = 1;

    }

    else if (NULL != (p = strstr(host, "://")) && (NULL == (delim = strpbrk(host, "/?#")) || delim > p))

    {

        *error = zbx_dsprintf(*error, "Unsupported scheme: %.*s.", (int)(p - host), host);

        return FAIL;

    }

​

    if (NULL != (p = strchr(host, '#')))

        *url = zbx_dsprintf(*url, "%s%.*s", (0 == scheme_found ? HTTP_SCHEME_STR : ""), (int)(p - host), host);

    else

        *url = zbx_dsprintf(*url, "%s%s", (0 == scheme_found ? HTTP_SCHEME_STR : ""), host);

​

    return SUCCEED;

}

​

static int  check_common_params(const char *host, const char *path, char **error)

{

    const char  *wrong_chr, URI_PROHIBIT_CHARS[] = {0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xA,0xB,0xC,0xD,0xE,\