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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "QobuzClient.hxx"
#include "lib/gcrypt/MD5.hxx"
#include "util/ConstBuffer.hxx"
#include <stdexcept>
#include <assert.h>
namespace {
class QueryStringBuilder {
bool first = true;
public:
QueryStringBuilder &operator()(std::string &dest, const char *name,
const char *value) noexcept {
dest.push_back(first ? '?' : '&');
first = false;
dest += name;
dest.push_back('=');
dest += value; // TODO: escape
return *this;
}
};
}
QobuzClient::QobuzClient(EventLoop &event_loop,
const char *_base_url,
const char *_app_id, const char *_app_secret,
const char *_device_manufacturer_id,
const char *_username, const char *_email,
const char *_password)
:base_url(_base_url), app_id(_app_id), app_secret(_app_secret),
device_manufacturer_id(_device_manufacturer_id),
username(_username), email(_email), password(_password),
curl(event_loop),
defer_invoke_handlers(event_loop, BIND_THIS_METHOD(InvokeHandlers))
{
}
CurlGlobal &
QobuzClient::GetCurl() noexcept
{
return *curl;
}
void
QobuzClient::StartLogin() noexcept
{
assert(!session.IsDefined());
assert(!login_request);
assert(!handlers.empty());
QobuzLoginHandler &handler = *this;
login_request = std::make_unique<QobuzLoginRequest>(*curl, base_url,
app_id,
username, email,
password,
device_manufacturer_id,
handler);
login_request->Start();
}
void
QobuzClient::AddLoginHandler(QobuzSessionHandler &h) noexcept
{
const std::lock_guard<Mutex> protect(mutex);
assert(!h.is_linked());
const bool was_empty = handlers.empty();
handlers.push_front(h);
if (!was_empty || login_request)
return;
if (session.IsDefined()) {
ScheduleInvokeHandlers();
} else {
// TODO: throttle login attempts?
std::string login_uri(base_url);
login_uri += "/login/username";
try {
StartLogin();
} catch (...) {
error = std::current_exception();
ScheduleInvokeHandlers();
return;
}
}
}
QobuzSession
QobuzClient::GetSession() const
{
const std::lock_guard<Mutex> protect(mutex);
if (error)
std::rethrow_exception(error);
if (!session.IsDefined())
throw std::runtime_error("No session");
return session;
}
void
QobuzClient::OnQobuzLoginSuccess(QobuzSession &&_session) noexcept
{
{
const std::lock_guard<Mutex> protect(mutex);
session = std::move(_session);
}
ScheduleInvokeHandlers();
}
void
QobuzClient::OnQobuzLoginError(std::exception_ptr _error) noexcept
{
{
const std::lock_guard<Mutex> protect(mutex);
error = std::move(_error);
}
ScheduleInvokeHandlers();
}
void
QobuzClient::InvokeHandlers() noexcept
{
const std::lock_guard<Mutex> protect(mutex);
while (!handlers.empty()) {
auto &h = handlers.front();
handlers.pop_front();
const ScopeUnlock unlock(mutex);
h.OnQobuzSession();
}
login_request.reset();
}
std::string
QobuzClient::MakeSignedUrl(const char *object, const char *method,
const std::multimap<std::string, std::string> &query) const noexcept
{
assert(!query.empty());
std::string uri(base_url);
uri += object;
uri.push_back('/');
uri += method;
QueryStringBuilder q;
std::string concatenated_query(object);
concatenated_query += method;
for (const auto &i : query) {
q(uri, i.first.c_str(), i.second.c_str());
concatenated_query += i.first;
concatenated_query += i.second;
}
q(uri, "app_id", app_id);
const auto request_ts = std::to_string(time(nullptr));
q(uri, "request_ts", request_ts.c_str());
concatenated_query += request_ts;
concatenated_query += app_secret;
const auto md5_hex = MD5Hex({concatenated_query.data(), concatenated_query.size()});
q(uri, "request_sig", &md5_hex.front());
return uri;
}
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