Robin E. R. Davies
439 lines
13 KiB
C++
439 lines
13 KiB
C++
// Copyright (c) 2022 Robin Davies
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "pch.h"
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#include "util.hpp"
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#include "Locale.hpp"
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#include "AudioConfig.hpp"
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#include "WebServer.hpp"
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#include <iostream>
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#include "Lv2Log.hpp"
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#include "ServiceConfiguration.hpp"
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#include "AvahiService.hpp"
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#include "WebServerConfig.hpp"
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#include <execinfo.h>
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#include "PiPedalSocket.hpp"
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#include "PluginHost.hpp"
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#include <boost/system/error_code.hpp>
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#include <filesystem>
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#include "PiPedalConfiguration.hpp"
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#include "AdminClient.hpp"
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#include "CommandLineParser.hpp"
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#include "Lv2SystemdLogger.hpp"
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#include <sys/stat.h>
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#include <boost/asio.hpp>
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#include "HtmlHelper.hpp"
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#include <thread>
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#include <atomic>
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#include <signal.h>
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#include <semaphore.h>
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#include "SchedulerPriority.hpp"
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#include "AudioFiles.hpp"
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#include <systemd/sd-daemon.h>
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#include "AlsaSequencer.hpp"
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using namespace pipedal;
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#ifdef __ARM_ARCH_ISA_A64
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#define AARCH64
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#endif
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class application_category : public boost::system::error_category
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{
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public:
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const char *name() const noexcept { return "PiPedal"; }
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std::string message(int ev) const { return "error message"; }
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};
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static std::atomic<bool> g_SigBreak = false;
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static std::atomic<bool> g_restart = false;
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void sig_handler(int signo)
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{
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// we're using sig_wait. No need to do anything.
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}
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void throwSystemError(int error)
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{
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}
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static bool isJackServiceRunning()
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{
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// look for the jack shmem .
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std::filesystem::path path = "/dev/shm/jack_default_0";
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return std::filesystem::exists(path);
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}
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#if 0 && ENABLE_BACKTRACE
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// void segvHandler(int sig)
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// {
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// void *array[10];
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// // Get void*'s for all entries on the stack
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// size_t size;
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// size = backtrace(array, 10);
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// // Print out all the frames to stderr
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// const char *message = "Error: SEGV signal received.\n";
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// auto _ = write(STDERR_FILENO, message, strlen(message));
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// backtrace_symbols_fd(array + 2, size - 2, STDERR_FILENO);
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// _exit(EXIT_FAILURE);
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// }
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// static void EnableBacktrace()
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// {
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// signal(SIGSEGV, segvHandler);
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// }
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#endif
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static bool TryGetLogLevel(const std::string &strLogLevel, LogLevel *result)
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{
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if (strLogLevel == "debug")
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{
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*result = LogLevel::Debug;
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return true;
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}
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if (strLogLevel == "info")
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{
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*result = LogLevel::Info;
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return true;
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}
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if (strLogLevel == "warning")
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{
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*result = LogLevel::Warning;
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return true;
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}
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if (strLogLevel == "error")
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{
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*result = LogLevel::Error;
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return true;
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}
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*result = LogLevel::Info;
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return false;
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}
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int main(int argc, char *argv[])
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{
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#ifndef WIN32
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umask(002); // newly created files in /var/pipedal get 775-ish permissions, which improves debugging/live-service interaction.
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#endif
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#if ENABLE_BACKTRACE
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EnableBacktrace();
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#endif
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// Check command line arguments.
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bool help = false;
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bool error = false;
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bool systemd = false;
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bool testExtraDevice = false;
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std::string logLevel;
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std::string portOption;
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CommandLineParser parser;
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parser.AddOption("-h", &help);
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parser.AddOption("--help", &help);
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parser.AddOption("-systemd", &systemd);
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parser.AddOption("-log-level", &logLevel);
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parser.AddOption("-port", &portOption);
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parser.AddOption("-test-extra-device", &testExtraDevice); // advertise two different devices (for testing multi-device connect)
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try
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{
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parser.Parse(argc, (const char **)argv);
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if (parser.Arguments().size() > 2)
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{
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throw PiPedalException("Too many arguments.");
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}
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if (parser.Arguments().size() == 0)
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{
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throw PiPedalException("<config_root> not provided.");
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}
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if (help || parser.Arguments().size() == 0)
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{
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std::cout << "pipedald - Pipedal web socket server.\n"
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"Copyright (c) 2022-2024 Robin Davies.\n"
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"\n";
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}
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}
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catch (const std::exception &e)
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{
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std::cout << "Error: " << e.what() << "\n\n";
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error = true;
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help = true;
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}
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if (help)
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{
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std::cout << "Usage: pipedald <doc_root> [<web_root>] [options...]\n\n"
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<< "Options:\n"
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<< " -systemd: Log to systemd journals instead of to the console.\n"
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<< " -port: Port to listen on e.g. 80, or 0.0.0.0:80\n"
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<< " -log-level: (debug|info|warning|error)"
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<< "Example:\n"
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<< " pipedald /etc/pipedal/config /etc/pipedal/react -port 80 \n"
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"\n"
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"Description:\n\n"
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" Configuration is read from <doc_root>/config.json\n"
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"\n"
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" If <web_root> is not provided, pipedal will serve from <doc_root>\n"
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"\n"
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" While debugging, bind the port to 0.0.0.0:8080, and connect to the default React\n"
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" server that's provided when you run 'npm run start' in 'react/src'. By default, the\n"
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" React debug server will connect to the socket server on 0.0.0.0:8080.\n\n";
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return error ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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if (systemd)
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{
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Lv2Log::set_logger(MakeLv2SystemdLogger());
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}
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SetThreadName("main");
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std::filesystem::path doc_root = parser.Arguments()[0];
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std::filesystem::path web_root = doc_root;
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if (parser.Arguments().size() >= 2)
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{
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web_root = parser.Arguments()[1];
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}
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PiPedalConfiguration configuration;
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try
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{
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configuration.Load(doc_root, web_root);
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}
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catch (const std::exception &e)
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{
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std::stringstream s;
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s << "Unable to read configuration from '" << (doc_root / "config.json") << "'. (" << e.what() << ")";
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Lv2Log::error(s.str());
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return EXIT_SUCCESS; // indicate to systemd that we don't want a restart.
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}
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Lv2Log::log_level(configuration.GetLogLevel());
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if (logLevel.length() != 0)
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{
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LogLevel lv2LogLevel;
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if (TryGetLogLevel(logLevel, &lv2LogLevel))
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{
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Lv2Log::log_level(lv2LogLevel);
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}
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else
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{
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Lv2Log::error(SS("Invalid log level: " << logLevel));
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return EXIT_SUCCESS; // indicate to systemd that we don't want a restart.
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}
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}
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if (portOption.length() != 0)
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{
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configuration.SetSocketServerEndpoint(portOption);
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}
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// clean up orphaned temporary files.
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const std::filesystem::path webTempDirectory = "/var/pipedal/web_temp";
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if (!webTempDirectory.empty())
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{
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std::filesystem::remove_all(webTempDirectory); //// user must belong to the pipedald grop when debugging.
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std::filesystem::create_directories(webTempDirectory);
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}
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// configure AudiDirectoryInfo to use the correct directories.
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AudioDirectoryInfo::SetResourceDirectory(configuration.GetWebRoot());
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AudioDirectoryInfo::SetTemporaryDirectory(webTempDirectory / "audiofiles");
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uint16_t port;
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std::shared_ptr<WebServer> server;
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try
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{
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// (web server threads inherit the main thread priority)
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SetThreadPriority(SchedulerPriority::WebServerThread);
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auto const address = boost::asio::ip::make_address(configuration.GetSocketServerAddress());
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port = static_cast<uint16_t>(configuration.GetSocketServerPort());
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auto const threads = std::max<int>(1, configuration.GetThreads());
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server = WebServer::create(
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address, port, web_root.c_str(), threads, configuration.GetMaxUploadSize());
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Lv2Log::info("Document root: %s Threads: %d", doc_root.c_str(), (int)threads);
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server->SetLogHttpRequests(configuration.LogHttpRequests());
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}
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catch (const std::exception &e)
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{
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std::stringstream s;
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s << "Fatal error: " << e.what() << std::endl;
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Lv2Log::error(s.str());
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return EXIT_SUCCESS; // indiate to systemd that we don't want a restart.
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}
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try
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{
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{
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{
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auto locale = Locale::GetInstance();
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Lv2Log::info(SS("Locale: " << locale->CurrentLocale()));
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try
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{
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auto collator = locale->GetCollator();
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}
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catch (std::exception &e)
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{
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Lv2Log::error(e.what());
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return EXIT_SUCCESS; // tell systemd not to auto-restart.
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}
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}
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// only accept signals on the main thread.
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// block now so that threads spawned by model inherit the block mask.
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int sig;
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sigset_t sigSet;
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int s;
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sigemptyset(&sigSet);
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sigaddset(&sigSet, SIGINT);
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sigaddset(&sigSet, SIGTERM);
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sigaddset(&sigSet, SIGUSR1);
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s = pthread_sigmask(SIG_BLOCK, &sigSet, NULL);
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if (s != 0)
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{
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throw std::logic_error("pthread_sigmask failed.");
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}
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PiPedalModel model;
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model.SetNetworkChangedListener(
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[&server]() mutable
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{
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if (server)
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{
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server->DisplayIpAddresses();
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}
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});
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model.SetRestartListener(
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[]()
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{
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g_restart = true;
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raise(SIGTERM); // throws an exception under gdb, but correctly restarts the service when running live.
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});
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model.Init(configuration);
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// Get heavy IO out of the way before letting dependent (Jack/ALSA) services run.
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model.LoadLv2PluginInfo();
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if (systemd)
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{
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// Tell systemd we're done.
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sd_notifyf(0, "READY=1\n"
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"MAINPID=%lu",
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(unsigned long)getpid());
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}
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model.WaitForAudioDeviceToComeOnline();
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#if JACK_HOST
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if (systemd)
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{
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if (!isJackServiceRunning())
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{
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Lv2Log::info("Waiting for Jack service.");
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// wait up to 15 seconds for the jack service to come online.
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for (int i = 0; i < 15; ++i)
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{
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// use the time to prepopulate ALSA device cache before jack
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// opens the device and we can't read properties.
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model.GetAlsaDevices();
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sleep(1);
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if (isJackServiceRunning())
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{
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break;
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}
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}
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}
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if (isJackServiceRunning())
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{
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Lv2Log::info("Found Jack service.");
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sleep(3); // jack needs a little time to get up to speed.
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}
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else
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{
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Lv2Log::info("Jack service not started.");
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}
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model.GetAlsaDevices();
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}
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#endif
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model.Load();
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auto pipedalSocketFactory = MakePiPedalSocketFactory(model);
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server->AddSocketFactory(pipedalSocketFactory);
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ConfigureWebServer(*server, model, port, configuration.GetMaxUploadSize());
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{
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server->RunInBackground(-1);
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model.StartHotspotMonitoring();
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{
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sigwait(&sigSet, &sig);
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if (systemd)
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{
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sd_notify(0, "STOPPING=1");
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}
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}
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}
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Lv2Log::info("Closing audio session.");
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server->StopListening(); // prevents premature reconnect attempts while we're shutting down clients in an orderly manner.
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model.Close();
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Lv2Log::info("Stopping web server.");
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server->ShutDown(5000);
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server->Join();
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}
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Lv2Log::info("Shutdown complete.");
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if (systemd)
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{
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sd_notify(0, "STOPPING=1");
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}
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if (g_restart)
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return EXIT_FAILURE; // indicate to systemd that we want a restart.
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}
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catch (const std::exception &e)
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{
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Lv2Log::error(e.what());
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS; // only exit in response to a signal.
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}
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