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#include <configparser.h>
#include <tagsouppullparser.h>
#include <exceptions.h>
#include <utils.h>
#include <logger.h>
#include <fstream>
#include <config.h>
#include <cstdlib>
#include <cstring>
#include <sys/types.h>
#include <pwd.h>
#include <cstring>
#include <cstdlib>
namespace newsbeuter {
configparser::configparser() {
register_handler("include", this);
}
configparser::~configparser() { }
action_handler_status configparser::handle_action(const std::string& action, const std::vector<std::string>& params) {
/*
* configparser also acts as config_action_handler to implement to recursive "include" command.
*/
if (action == "include") {
if (params.size() < 1) {
return AHS_TOO_FEW_PARAMS;
}
if (this->parse(utils::resolve_tilde(params[0])))
return AHS_OK;
else
return AHS_FILENOTFOUND;
}
return AHS_INVALID_COMMAND;
}
bool configparser::parse(const std::string& filename) {
/*
* this function parses a config file.
*
* First, it checks whether this file has already been included, and if not,
* it does the following:
* - open the file
* - read if line by line
* - tokenize every line
* - if there is at least one token, look up a registered config_action_handler to handle to command (which is specified in the first token)
* - hand over the tokenize results to the config_action_handler
* - if an error happens, react accordingly.
*/
if (included_files.find(filename) != included_files.end()) {
GetLogger().log(LOG_WARN, "configparser::parse: file %s has already been included", filename.c_str());
return true;
}
included_files.insert(included_files.begin(), filename);
unsigned int linecounter = 1;
std::ifstream f(filename.c_str());
std::string line;
getline(f,line);
if (!f.is_open()) {
GetLogger().log(LOG_WARN, "configparser::parse: file %s couldn't be opened", filename.c_str());
return false;
}
while (f.is_open() && !f.eof()) {
GetLogger().log(LOG_DEBUG,"configparser::parse: tokenizing %s",line.c_str());
std::vector<std::string> tokens = utils::tokenize_quoted(line);
if (tokens.size() > 0) {
std::string cmd = tokens[0];
config_action_handler * handler = action_handlers[cmd];
if (handler) {
tokens.erase(tokens.begin()); // delete first element
action_handler_status status = handler->handle_action(cmd,tokens);
if (status != AHS_OK) {
const char * errmsg = get_errmsg(status);
throw configexception(utils::strprintf(_("Error while processing command `%s' (%s line %u): %s"), line.c_str(), filename.c_str(), linecounter, errmsg));
}
} else {
throw configexception(utils::strprintf(_("unknown command `%s'"), cmd.c_str()));
}
}
getline(f,line);
++linecounter;
}
return true;
}
void configparser::register_handler(const std::string& cmd, config_action_handler * handler) {
GetLogger().log(LOG_DEBUG,"configparser::register_handler: cmd = %s handler = %p", cmd.c_str(), handler);
action_handlers[cmd] = handler;
}
void configparser::unregister_handler(const std::string& cmd) {
GetLogger().log(LOG_DEBUG,"configparser::unregister_handler: cmd = %s", cmd.c_str());
action_handlers[cmd] = 0;
}
const char * configparser::get_errmsg(action_handler_status status) {
switch (status) {
case AHS_INVALID_PARAMS:
return _("invalid parameters.");
case AHS_TOO_FEW_PARAMS:
return _("too few parameters.");
case AHS_INVALID_COMMAND:
return _("unknown command (bug).");
case AHS_FILENOTFOUND:
return _("file couldn't be opened.");
default:
return _("unknown error (bug).");
}
}
}
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