put CURL related functions into a separate file

src/curl_handle.cpp

@@ -0,0 +1,67 @@
+/***************************************************************************
+ *   Copyright (C) 2008-2009 by Andrzej Rybczak                            *
+ *   electricityispower@gmail.com                                          *
+ *                                                                         *
+ *   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 2 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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
+ ***************************************************************************/
+
+#include "curl_handle.h"
+
+#ifdef HAVE_CURL_CURL_H
+
+#include <cstdlib>
+
+namespace
+{
+	size_t write_data(char *buffer, size_t size, size_t nmemb, void *data)
+	{
+		size_t result = size*nmemb;
+		static_cast<std::string *>(data)->append(buffer, result);
+		return result;
+	}
+}
+
+CURLcode Curl::perform(const std::string &URL, std::string &data, unsigned timeout)
+{
+#	ifdef HAVE_PTHREAD_H
+	static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+	pthread_mutex_lock(&lock);
+#	endif
+	CURLcode result;
+	CURL *c = curl_easy_init();
+	curl_easy_setopt(c, CURLOPT_URL, URL.c_str());
+	curl_easy_setopt(c, CURLOPT_WRITEFUNCTION, write_data);
+	curl_easy_setopt(c, CURLOPT_WRITEDATA, &data);
+	curl_easy_setopt(c, CURLOPT_CONNECTTIMEOUT, timeout);
+	curl_easy_setopt(c, CURLOPT_NOSIGNAL, 1);
+	result = curl_easy_perform(c);
+	curl_easy_cleanup(c);
+#	ifdef HAVE_PTHREAD_H
+	pthread_mutex_unlock(&lock);
+#	endif
+	return result;
+}
+
+std::string Curl::escape(const std::string &s)
+{
+	char *cs = curl_easy_escape(0, s.c_str(), s.length());
+	std::string result(cs);
+	curl_free(cs);
+	return result;
+}
+
+#endif // HAVE_CURL_CURL_H
+