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 "httprequest.h"

#include "embed.h"

​

#include "zbxstr.h"

#include "zbxjson.h"

#include "zbxhttp.h"

#include "duktape.h"

#include "zbxalgo.h"

#include "zbxcurl.h"

#include "global.h"

​

#ifdef HAVE_LIBCURL

​

#define ZBX_HTTPAUTH_NONE   CURLAUTH_NONE

#define ZBX_HTTPAUTH_BASIC  CURLAUTH_BASIC

#define ZBX_HTTPAUTH_DIGEST CURLAUTH_DIGEST

#define ZBX_HTTPAUTH_NEGOTIATE  CURLAUTH_NEGOTIATE

#define ZBX_HTTPAUTH_NTLM   CURLAUTH_NTLM

​

typedef struct

{

    CURL            *handle;

    struct curl_slist   *headers;

    char            *data;

    char            *headers_in;

    size_t          data_alloc;

    size_t          data_offset;

    size_t          headers_in_alloc;

    size_t          headers_in_offset;

    unsigned char       custom_header;

    size_t          headers_sz;

}

zbx_es_httprequest_t;

​

/* ZBX_CURL_SETOPT() macro is a code snippet to make code shorter and facilitate resource deallocation */

/* in case of error. Be careful with using ZBX_CURL_SETOPT(), duk_push_error_object() and duk_error()  */

/* in functions - it is easy to get memory leaks because duk_error() causes longjmp().                 */

/* Note that the caller of ZBX_CURL_SETOPT() must define variable 'int err_index' and label 'out'.     */

#define ZBX_CURL_SETOPT(ctx, handle, opt, value, err)                               \

    do                                                  \

    {                                                   \

        if (CURLE_OK != (err = curl_easy_setopt(handle, opt, value)))                   \

        {                                               \

            err_index = duk_push_error_object(ctx, DUK_RET_EVAL_ERROR,              \

                    "cannot set cURL option " #opt ": %s.", curl_easy_strerror(err));   \

            goto out;                                       \

        }                                               \

    }                                                   \

    while(0)

​

static size_t   curl_write_cb(void *ptr, size_t size, size_t nmemb, void *userdata)

{

    size_t          r_size = size * nmemb;

    zbx_es_httprequest_t    *request = (zbx_es_httprequest_t *)userdata;

​

    zbx_str_memcpy_alloc(&request->data, &request->data_alloc, &request->data_offset, (const char *)ptr, r_size);

​

    return r_size;

}

​

static size_t   curl_header_cb(void *ptr, size_t size, size_t nmemb, void *userdata)

{

    size_t          r_size = size * nmemb;

    zbx_es_httprequest_t    *request = (zbx_es_httprequest_t *)userdata;

​

    zbx_strncpy_alloc(&request->headers_in, &request->headers_in_alloc, &request->headers_in_offset, (const char *)ptr, r_size);

​

    return r_size;

}

​

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

 *                                                                            *

 * Purpose: return backing C structure embedded in HttpRequest object         *

 *                                                                            *

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

static zbx_es_httprequest_t *es_httprequest(duk_context *ctx)

{