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/*
Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "update_checker.h"
#include "version.h"
#include "util.h"
#include <dcp/raw_convert.h>
#include <libcxml/cxml.h>
#include <curl/curl.h>
#include <boost/algorithm/string.hpp>
#include <string>
#include <iostream>
#define BUFFER_SIZE 1024
using std::cout;
using std::min;
using std::string;
using std::vector;
using boost::is_any_of;
using boost::ends_with;
using dcp::raw_convert;
/** Singleton instance */
UpdateChecker* UpdateChecker::_instance = 0;
static size_t
write_callback_wrapper (void* data, size_t size, size_t nmemb, void* user)
{
return reinterpret_cast<UpdateChecker*>(user)->write_callback (data, size, nmemb);
}
/** Construct an UpdateChecker. This sets things up and starts a thread to
* do the work.
*/
UpdateChecker::UpdateChecker ()
: _buffer (new char[BUFFER_SIZE])
, _offset (0)
, _curl (0)
, _state (NOT_RUN)
, _emits (0)
, _thread (0)
, _to_do (0)
, _terminate (false)
{
_curl = curl_easy_init ();
curl_easy_setopt (_curl, CURLOPT_URL, "https://dcpomatic.com/update");
curl_easy_setopt (_curl, CURLOPT_WRITEFUNCTION, write_callback_wrapper);
curl_easy_setopt (_curl, CURLOPT_WRITEDATA, this);
curl_easy_setopt (_curl, CURLOPT_TIMEOUT, 20);
string const agent = "dcpomatic/" + string (dcpomatic_version);
curl_easy_setopt (_curl, CURLOPT_USERAGENT, agent.c_str ());
}
void
UpdateChecker::start ()
{
_thread = new boost::thread (boost::bind (&UpdateChecker::thread, this));
#ifdef DCPOMATIC_LINUX
pthread_setname_np (_thread->native_handle(), "update-checker");
#endif
}
UpdateChecker::~UpdateChecker ()
{
{
boost::mutex::scoped_lock lm (_process_mutex);
_terminate = true;
}
_condition.notify_all ();
if (_thread) {
/* Ideally this would be a DCPOMATIC_ASSERT(_thread->joinable()) but we
can't throw exceptions from a destructor.
*/
if (_thread->joinable ()) {
_thread->join ();
}
}
delete _thread;
curl_easy_cleanup (_curl);
delete[] _buffer;
}
/** Start running the update check */
void
UpdateChecker::run ()
{
boost::mutex::scoped_lock lm (_process_mutex);
_to_do++;
_condition.notify_one ();
}
void
UpdateChecker::thread ()
{
while (true) {
/* Block until there is something to do */
boost::mutex::scoped_lock lock (_process_mutex);
while (_to_do == 0 && !_terminate) {
_condition.wait (lock);
}
if (_terminate) {
return;
}
--_to_do;
lock.unlock ();
try {
_offset = 0;
/* Perform the request */
int r = curl_easy_perform (_curl);
if (r != CURLE_OK) {
set_state (FAILED);
return;
}
/* Parse the reply */
_buffer[_offset] = '\0';
string s (_buffer);
cxml::Document doc ("Update");
doc.read_string (s);
/* Read the current stable and test version numbers */
string stable;
string test;
{
boost::mutex::scoped_lock lm (_data_mutex);
stable = doc.string_child ("Stable");
test = doc.string_child ("Test");
}
if (version_less_than (dcpomatic_version, stable)) {
_stable = stable;
}
if (!test.empty() && version_less_than (dcpomatic_version, test)) {
_test = test;
}
if (_stable || _test) {
set_state (YES);
} else {
set_state (NO);
}
} catch (...) {
set_state (FAILED);
}
}
}
size_t
UpdateChecker::write_callback (void* data, size_t size, size_t nmemb)
{
size_t const t = min (size * nmemb, size_t (BUFFER_SIZE - _offset - 1));
memcpy (_buffer + _offset, data, t);
_offset += t;
return t;
}
void
UpdateChecker::set_state (State s)
{
{
boost::mutex::scoped_lock lm (_data_mutex);
_state = s;
_emits++;
}
emit (boost::bind (boost::ref (StateChanged)));
}
UpdateChecker *
UpdateChecker::instance ()
{
if (!_instance) {
_instance = new UpdateChecker ();
_instance->start ();
}
return _instance;
}
bool
UpdateChecker::version_less_than (string const & a, string const & b)
{
vector<string> ap;
split (ap, a, is_any_of ("."));
vector<string> bp;
split (bp, b, is_any_of ("."));
DCPOMATIC_ASSERT (ap.size() == 3 && bp.size() == 3);
if (ap[0] != bp[0]) {
return raw_convert<int> (ap[0]) < raw_convert<int> (bp[0]);
}
if (ap[1] != bp[1]) {
return raw_convert<int> (ap[1]) < raw_convert<int> (bp[1]);
}
float am;
if (ends_with (ap[2], "devel")) {
am = raw_convert<int> (ap[2].substr (0, ap[2].length() - 5)) + 0.5;
} else {
am = raw_convert<int> (ap[2]);
}
float bm;
if (ends_with (bp[2], "devel")) {
bm = raw_convert<int> (bp[2].substr (0, bp[2].length() - 5)) + 0.5;
} else {
bm = raw_convert<int> (bp[2]);
}
return am < bm;
}
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