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config.cpp
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#include <cstdlib>
#include <fstream>
#include <iostream>
#include <trogdord/json.h>
#include <trogdor/utility.h>
#include <trogdor/filesystem.h>
#include <trogdord/config.h>
#include <trogdord/filesystem.h>
#ifndef TROGDORD_INI_PATH
#define TROGDORD_INI_PATH ""
#endif
// Maps env variables to config options they override
const std::unordered_map<std::string, std::string> Config::ENV = {
{"TROGDORD_PORT", CONFIG_KEY_PORT},
{"TROGDORD_REUSE_ADDRESS", CONFIG_KEY_REUSE_ADDRESS},
{"TROGDORD_SEND_TCP_KEEPALIVE", CONFIG_KEY_SEND_TCP_KEEPALIVE},
{"TROGDORD_LISTEN_IPS", CONFIG_KEY_LISTEN_IPS},
{"TROGDORD_LOGTO", CONFIG_KEY_LOGTO},
{"TROGDORD_INPUT_LISTENERS", CONFIG_KEY_INPUT_LISTENERS},
{"TROGDORD_OUTPUT_DRIVER", CONFIG_KEY_OUTPUT_DRIVER},
{"TROGDORD_REDIS_HOST", CONFIG_KEY_REDIS_HOST},
{"TROGDORD_REDIS_USERNAME", CONFIG_KEY_REDIS_USERNAME},
{"TROGDORD_REDIS_PASSWORD", CONFIG_KEY_REDIS_PASSWORD},
{"TROGDORD_REDIS_PORT", CONFIG_KEY_REDIS_PORT},
{"TROGDORD_REDIS_CONNECTION_TIMEOUT", CONFIG_KEY_REDIS_CONNECTION_TIMEOUT},
{"TROGDORD_REDIS_CONNECTION_RETRY_INTERVAL", CONFIG_KEY_REDIS_CONNECTION_RETRY_INTERVAL},
{"TROGDORD_REDIS_OUTPUT_CHANNEL", CONFIG_KEY_REDIS_OUTPUT_CHANNEL},
{"TROGDORD_REDIS_INPUT_CHANNEL", CONFIG_KEY_REDIS_INPUT_CHANNEL},
{"TROGDORD_DEFINITIONS_PATH", CONFIG_KEY_DEFINITIONS_PATH},
{"TROGDORD_STATE_ENABLED", CONFIG_KEY_STATE_ENABLED},
{"TROGDORD_STATE_AUTORESTORE_ENABLED", CONFIG_KEY_STATE_AUTORESTORE_ENABLED},
{"TROGDORD_STATE_DUMP_SHUTDOWN_ENABLED", CONFIG_KEY_STATE_DUMP_SHUTDOWN_ENABLED},
{"TROGDORD_STATE_CRASH_RECOVERY_ENABLED", CONFIG_KEY_STATE_CRASH_RECOVERY_ENABLED},
{"TROGDORD_STATE_FORMAT", CONFIG_KEY_STATE_FORMAT},
{"TROGDORD_STATE_PATH", CONFIG_KEY_STATE_PATH},
{"TROGDORD_STATE_MAX_DUMPS_PER_GAME", CONFIG_KEY_STATE_MAX_DUMPS_PER_GAME},
{"TROGDORD_EXTENSIONS_PATH", CONFIG_KEY_EXTENSIONS_PATH},
{"TROGDORD_EXTENSIONS_LOAD", CONFIG_KEY_EXTENSIONS_LOAD}
};
// Default ini values
const std::unordered_map<std::string, std::string> Config::DEFAULTS = {
{CONFIG_KEY_PORT, "1040"},
{CONFIG_KEY_REUSE_ADDRESS, "true"},
{CONFIG_KEY_SEND_TCP_KEEPALIVE, "true"},
{CONFIG_KEY_LISTEN_IPS, "[\"127.0.0.1\", \"::1\"]"},
{CONFIG_KEY_LOGTO, "stderr"},
{CONFIG_KEY_INPUT_LISTENERS, "[]"},
{CONFIG_KEY_OUTPUT_DRIVER, "local"},
{CONFIG_KEY_REDIS_HOST, "localhost"},
{CONFIG_KEY_REDIS_USERNAME, ""},
{CONFIG_KEY_REDIS_PASSWORD, ""},
{CONFIG_KEY_REDIS_PORT, "6379"},
{CONFIG_KEY_REDIS_CONNECTION_TIMEOUT, "5000"},
{CONFIG_KEY_REDIS_CONNECTION_RETRY_INTERVAL, "5000"},
{CONFIG_KEY_REDIS_OUTPUT_CHANNEL, "trogdord:out"},
{CONFIG_KEY_REDIS_INPUT_CHANNEL, "trogdord:in"},
{CONFIG_KEY_DEFINITIONS_PATH, "share/trogdor"},
{CONFIG_KEY_STATE_ENABLED, "false"},
{CONFIG_KEY_STATE_AUTORESTORE_ENABLED, "false"},
{CONFIG_KEY_STATE_DUMP_SHUTDOWN_ENABLED, "false"},
{CONFIG_KEY_STATE_CRASH_RECOVERY_ENABLED, "false"},
{CONFIG_KEY_STATE_FORMAT, "json"},
{CONFIG_KEY_STATE_PATH, "var/trogdord/state"},
{CONFIG_KEY_STATE_MAX_DUMPS_PER_GAME, "0"},
{CONFIG_KEY_EXTENSIONS_PATH, "lib/trogdord"},
{CONFIG_KEY_EXTENSIONS_LOAD, "[]"}
};
// Any setting that has a value of true will be considered sensitive
// information and will be hidden from the outside world.
const std::unordered_map<std::string, bool> Config::hidden = {
{CONFIG_KEY_PORT, true},
{CONFIG_KEY_REUSE_ADDRESS, true},
{CONFIG_KEY_SEND_TCP_KEEPALIVE, true},
{CONFIG_KEY_LISTEN_IPS, true},
{CONFIG_KEY_LOGTO, true},
{CONFIG_KEY_INPUT_LISTENERS, true},
{CONFIG_KEY_OUTPUT_DRIVER, false},
{CONFIG_KEY_REDIS_HOST, true},
{CONFIG_KEY_REDIS_USERNAME, true},
{CONFIG_KEY_REDIS_PASSWORD, true},
{CONFIG_KEY_REDIS_PORT, true},
{CONFIG_KEY_REDIS_CONNECTION_TIMEOUT, true},
{CONFIG_KEY_REDIS_CONNECTION_RETRY_INTERVAL, true},
{CONFIG_KEY_REDIS_OUTPUT_CHANNEL, false},
{CONFIG_KEY_REDIS_INPUT_CHANNEL, false},
{CONFIG_KEY_DEFINITIONS_PATH, true},
{CONFIG_KEY_STATE_ENABLED, false},
{CONFIG_KEY_STATE_AUTORESTORE_ENABLED, true},
{CONFIG_KEY_STATE_DUMP_SHUTDOWN_ENABLED, true},
{CONFIG_KEY_STATE_CRASH_RECOVERY_ENABLED, true},
{CONFIG_KEY_STATE_FORMAT, true},
{CONFIG_KEY_STATE_PATH, true},
{CONFIG_KEY_STATE_MAX_DUMPS_PER_GAME, false},
{CONFIG_KEY_EXTENSIONS_PATH, true},
{CONFIG_KEY_EXTENSIONS_LOAD, false}
};
const std::unordered_map<std::string, const std::type_info *> Config::types = {
{CONFIG_KEY_PORT, &typeid(int)},
{CONFIG_KEY_REUSE_ADDRESS, &typeid(bool)},
{CONFIG_KEY_SEND_TCP_KEEPALIVE, &typeid(bool)},
{CONFIG_KEY_LISTEN_IPS, &typeid(std::string)},
{CONFIG_KEY_LOGTO, &typeid(std::string)},
{CONFIG_KEY_INPUT_LISTENERS, &typeid(std::string)},
{CONFIG_KEY_OUTPUT_DRIVER, &typeid(std::string)},
{CONFIG_KEY_REDIS_HOST, &typeid(std::string)},
{CONFIG_KEY_REDIS_USERNAME, &typeid(std::string)},
{CONFIG_KEY_REDIS_PASSWORD, &typeid(std::string)},
{CONFIG_KEY_REDIS_PORT, &typeid(int)},
{CONFIG_KEY_REDIS_CONNECTION_TIMEOUT, &typeid(int)},
{CONFIG_KEY_REDIS_CONNECTION_RETRY_INTERVAL, &typeid(int)},
{CONFIG_KEY_REDIS_OUTPUT_CHANNEL, &typeid(std::string)},
{CONFIG_KEY_REDIS_INPUT_CHANNEL, &typeid(std::string)},
{CONFIG_KEY_DEFINITIONS_PATH, &typeid(std::string)},
{CONFIG_KEY_STATE_ENABLED, &typeid(bool)},
{CONFIG_KEY_STATE_AUTORESTORE_ENABLED, &typeid(bool)},
{CONFIG_KEY_STATE_DUMP_SHUTDOWN_ENABLED, &typeid(bool)},
{CONFIG_KEY_STATE_CRASH_RECOVERY_ENABLED, &typeid(bool)},
{CONFIG_KEY_STATE_FORMAT, &typeid(std::string)},
{CONFIG_KEY_STATE_PATH, &typeid(std::string)},
{CONFIG_KEY_STATE_MAX_DUMPS_PER_GAME, &typeid(int)},
{CONFIG_KEY_EXTENSIONS_PATH, &typeid(std::string)},
{CONFIG_KEY_EXTENSIONS_LOAD, &typeid(std::string)}
};
// Singleton instance of Config
std::unique_ptr<Config> Config::instance = nullptr;
/*****************************************************************************/
Config::Config(std::string newIniPath) noexcept {
// Load the ini file's values
load(newIniPath);
}
/*****************************************************************************/
std::unique_ptr<Config> &Config::get() noexcept {
if (!instance) {
instance = std::unique_ptr<Config>(new Config(TROGDORD_INI_PATH));
}
return instance;
}
/*****************************************************************************/
std::string Config::relativeToAbsolutePath(std::string relative) {
relative = trogdor::trim(relative);
if (0 != relative.compare("")) {
relative = Filesystem::getAbsolutePath(relative);
}
return relative;
}
/*****************************************************************************/
std::vector<std::string> Config::getExtensions() {
rapidjson::Document extensionsArr;
std::string extensionsStr = Config::get()->getString(
Config::CONFIG_KEY_EXTENSIONS_LOAD
);
extensionsArr.Parse(extensionsStr.c_str());
if (extensionsArr.HasParseError()) {
throw ServerException(
std::string("invalid trogdord.ini value for ") +
Config::CONFIG_KEY_EXTENSIONS_LOAD
);
}
else if (rapidjson::kArrayType != extensionsArr.GetType()) {
throw ServerException(
std::string("trogdord.ini value for ") +
Config::CONFIG_KEY_EXTENSIONS_LOAD +
" must be a JSON array of strings."
);
}
std::vector<std::string> extensions;
for (auto i = extensionsArr.Begin(); i != extensionsArr.End(); i++) {
extensions.push_back(i->GetString());
}
return extensions;
}
/*****************************************************************************/
void Config::initErrorLogger() noexcept {
logFileStream = nullptr;
std::string logto = trogdor::strToLower(getString(CONFIG_KEY_LOGTO));
if (0 == logto.compare("stderr")) {
errStream = std::make_unique<ServerErr>(&std::cerr);
}
else if (0 == logto.compare("stdout")) {
errStream = std::make_unique<ServerErr>(&std::cout);
}
else {
logto = Filesystem::getAbsolutePath(logto);
try {
logFileStream = std::make_unique<std::ofstream>(logto, std::ofstream::app);
errStream = std::make_unique<ServerErr>(logFileStream.get());
}
// If for whatever reason we failed to open the file for writing
// (maybe the process doesn't have the necessary permissions?), fall
// back to std::cerr.
catch (const std::exception &e) {
std::cerr << e.what() << std::endl;
std::cerr << "WARNING: failed to open " << logto << " for writing. Falling back to stderr." << std::endl;
logFileStream = nullptr;
errStream = std::make_unique<ServerErr>(&std::cerr);
}
}
}
/*****************************************************************************/
void Config::load(std::string newIniPath) noexcept {
iniPath = trogdor::trim(newIniPath);
ini.clear();
// Start by populate the ini object with its default values
for (auto &defaultVal: DEFAULTS) {
ini[defaultVal.first] = defaultVal.second;
}
// Next, override the defaults with any options in the ini file
if (
0 != iniPath.compare("") &&
STD_FILESYSTEM::exists(iniPath) &&
!STD_FILESYSTEM::is_directory(iniPath)
) {
int status = ini_parse(iniPath.c_str(), [](
void *data,
const char *section,
const char *name,
const char *value
) -> int {
std::string key = section ? std::string(section) + '.' + name : name;
static_cast<Config *>(data)->ini[key] = value;
return 1;
}, this);
if (-1 == status) {
std::cerr << "Error: " << "Couldn't open " << iniPath
<< " for reading." << std::endl;
exit(EXIT_INI_ERROR);
}
else if (-2 == status) {
std::cerr << "Error: " << "A memory allocation error occured when attempting to parse "
<< iniPath << '.' << std::endl;
exit(EXIT_INI_ERROR);
}
else if (0 != status) {
std::cerr << "Error: " << "An unknown error occured when attempting to parse "
<< iniPath << '.' << std::endl;
}
}
// Finally, override any settings that have been configured in environment
// variables (these take precedence over trogdord.ini.)
for (auto &envVar: ENV) {
if (const char *setting = std::getenv(envVar.first.c_str()); setting) {
ini[envVar.second] = setting;
}
}
// Setup global error logger
initErrorLogger();
}