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ccurl_thread.h
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ccurl_thread.h
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/*
*
* Conky, a system monitor, based on torsmo
*
* Please see COPYING for details
*
* Copyright (c) 2005-2018 Brenden Matthews, Philip Kovacs, et. al.
* (see AUTHORS)
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef _CURL_THREAD_H_
#define _CURL_THREAD_H_
#include <curl/curl.h>
#include "logging.h"
#include "update-cb.hh"
namespace priv {
// factored out stuff that does not depend on the template parameters
class curl_internal {
public:
std::string last_modified;
std::string etag;
std::string data;
CURL *curl;
static size_t parse_header_cb(void *ptr, size_t size, size_t nmemb,
void *data);
static size_t write_cb(void *ptr, size_t size, size_t nmemb, void *data);
void do_work();
// called by do_work() after downloading data from the uri
// it should populate the result variable
virtual void process_data() = 0;
explicit curl_internal(const std::string &url);
virtual ~curl_internal() {
if (curl) curl_easy_cleanup(curl);
}
};
} // namespace priv
/*
* Curl callback class template
* the key is an url
*/
template <typename Result, typename... Keys>
class curl_callback : public conky::callback<Result, std::string, Keys...>,
public priv::curl_internal {
typedef conky::callback<Result, std::string, Keys...> Base1;
typedef priv::curl_internal Base2;
protected:
virtual void work() {
DBGP("reading curl data from '%s'", std::get<0>(Base1::tuple).c_str());
do_work();
}
public:
curl_callback(uint32_t period, const typename Base1::Tuple &tuple)
: Base1(period, false, tuple), Base2(std::get<0>(tuple)) {}
};
/* $curl exports begin */
/* runs instance of $curl */
void ccurl_process_info(char *p, int p_max_size, const std::string &uri,
int interval);
void curl_parse_arg(struct text_object *, const char *);
void curl_print(struct text_object *, char *, int);
void curl_obj_free(struct text_object *);
/* $curl exports end */
#endif /* _CURL_THREAD_H_ */