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// curl_easy.hpp
/*===========================================================================
*
* PUBLIC DOMAIN NOTICE
* National Center for Biotechnology Information
*
* This software/database is a "United States Government Work" under the
* terms of the United States Copyright Act. It was written as part of
* the author's official duties as a United States Government employee and
* thus cannot be copyrighted. This software/database is freely available
* to the public for use. The National Library of Medicine and the U.S.
* Government have not placed any restriction on its use or reproduction.
*
* Although all reasonable efforts have been taken to ensure the accuracy
* and reliability of the software and data, the NLM and the U.S.
* Government do not and cannot warrant the performance or results that
* may be obtained by using this software or data. The NLM and the U.S.
* Government disclaim all warranties, express or implied, including
* warranties of performance, merchantability or fitness for any particular
* purpose.
*
* Please cite the author in any work or product based on this material.
*
* ===========================================================================
*
* Author: Vyacheslav Brover
*
* Dependencies: curl.{h,c}
*
* File Description:
* curl_easy functions
*
*/
#ifdef _MSC_VER
#error "UNIX is required"
#endif
#include <unistd.h>
extern "C"
{
#include <curl/curl.h>
// Linking requires: -lcurl
}
#include "common.hpp"
using namespace Common_sp;
namespace CURL_sp
{
SoftwareVersion getLibVersion ();
struct Curl
{
CURL* eh {nullptr};
Curl ()
: eh (curl_easy_init ())
{ if (! eh)
throw runtime_error ("Cannot initialize curl_easy");
// Override the libcurl system-wide default
// PD-5495 / https://github.com/ncbi/amr/issues/170
if (const char *env_ca_bundle = getenv ("CURL_CA_BUNDLE"))
curl_easy_setopt (eh, CURLOPT_CAINFO, env_ca_bundle);
// https://stackoverflow.com/questions/1759956/curl-error-18-transfer-closed-with-outstanding-read-data-remaining
curl_easy_setopt (eh, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0); // To avoid code=18 error "transfer closed with NNN bytes remaining to read"
}
~Curl ()
{ curl_easy_cleanup (eh); }
void download (const string &url,
const string &fName);
string read (const string &url);
private:
void process (const string &url,
const string &error_msg_action);
};
} // namespace