configfileparser.cpp
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#include "configfileparser.h"
#include <fcntl.h>
#include <unistd.h>
#include <sstream>
#include "fstream"
#include "exceptions.h"
#include "utils.h"
#include <regex>
mosquitto_auth_opt::mosquitto_auth_opt(const std::string &key, const std::string &value)
{
this->key = strdup(key.c_str());
this->value = strdup(value.c_str());
}
mosquitto_auth_opt::mosquitto_auth_opt(mosquitto_auth_opt &&other)
{
this->key = other.key;
this->value = other.value;
other.key = nullptr;
other.value = nullptr;
}
mosquitto_auth_opt::~mosquitto_auth_opt()
{
if (key)
delete key;
if (value)
delete value;
}
AuthOptCompatWrap::AuthOptCompatWrap(const std::unordered_map<std::string, std::string> &authOpts)
{
for(auto &pair : authOpts)
{
mosquitto_auth_opt opt(pair.first, pair.second);
optArray.push_back(std::move(opt));
}
}
ConfigFileParser::ConfigFileParser(const std::string &path) :
path(path)
{
validKeys.insert("auth_plugin");
}
void ConfigFileParser::loadFile()
{
if (access(path.c_str(), R_OK) != 0)
{
std::ostringstream oss;
oss << "Error: " << path << " is not there or not readable";
throw ConfigFileException(oss.str());
}
std::ifstream infile(path, std::ios::in);
if (!infile.is_open())
{
std::ostringstream oss;
oss << "Error loading " << path;
throw ConfigFileException(oss.str());
}
std::list<std::string> lines;
const std::regex r("^([a-zA-Z0-9_\\-]+) +([a-zA-Z0-9_\\-/\\.]+)$");
// First parse the file and keep the valid lines.
for(std::string line; getline(infile, line ); )
{
trim(line);
if (startsWith(line, "#"))
continue;
if (line.empty())
continue;
std::smatch matches;
if (!std::regex_search(line, matches, r) || matches.size() != 3)
{
std::ostringstream oss;
oss << "Line '" << line << "' not in 'key value' format";
throw ConfigFileException(oss.str());
}
lines.push_back(line);
}
authOpts.clear();
authOptCompatWrap.reset();
// Then once we know the config file is valid, process it.
for (std::string &line : lines)
{
std::smatch matches;
if (!std::regex_search(line, matches, r) || matches.size() != 3)
{
throw ConfigFileException("Config parse error at a point that should not be possible.");
}
std::string key = matches[1].str();
const std::string value = matches[2].str();
const std::string auth_opt_ = "auth_opt_";
if (startsWith(key, auth_opt_))
{
key.replace(0, auth_opt_.length(), "");
authOpts[key] = value;
}
else
{
auto valid_key_it = validKeys.find(key);
if (valid_key_it == validKeys.end())
{
std::ostringstream oss;
oss << "Config key '" << key << "' is not valid";
throw ConfigFileException(oss.str());
}
if (key == "auth_plugin")
{
this->authPluginPath = value;
}
}
}
authOptCompatWrap.reset(new AuthOptCompatWrap(authOpts));
}
AuthOptCompatWrap &ConfigFileParser::getAuthOptsCompat()
{
return *authOptCompatWrap.get();
}