mirror of https://github.com/aria2/aria2
227 lines
7.2 KiB
C++
227 lines
7.2 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "common.h"
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#include <cstdlib>
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#include <cstring>
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#include <sstream>
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#include <iostream>
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#include "Option.h"
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#include "prefs.h"
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#include "OptionParser.h"
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#include "OptionHandlerFactory.h"
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#include "OptionHandler.h"
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#include "util.h"
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#include "message.h"
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#include "Exception.h"
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#include "a2io.h"
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#include "help_tags.h"
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#include "File.h"
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#include "fmt.h"
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#include "OptionHandlerException.h"
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#include "error_code.h"
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#include "SimpleRandomizer.h"
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#include "bittorrent_helper.h"
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#include "BufferedFile.h"
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#include "console.h"
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#ifndef HAVE_DAEMON
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#include "daemon.h"
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#endif // !HAVE_DAEMON
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namespace aria2 {
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extern void showVersion();
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extern void showUsage(const std::string& keyword, const OptionParser& oparser);
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namespace {
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void overrideWithEnv(Option& op, const OptionParser& optionParser,
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const std::string& pref,
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const std::string& envName)
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{
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char* value = getenv(envName.c_str());
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if(value) {
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try {
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optionParser.findByName(pref)->parse(op, value);
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} catch(Exception& e) {
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global::cerr()->printf
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("Caught Error while parsing environment variable '%s'\n%s\n",
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envName.c_str(),
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e.stackTrace().c_str());
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}
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}
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}
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} // namespace
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void option_processing(Option& op, std::vector<std::string>& uris,
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int argc, char* argv[])
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{
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OptionParser oparser;
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oparser.setOptionHandlers(OptionHandlerFactory::createOptionHandlers());
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try {
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bool noConf = false;
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std::string ucfname;
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std::stringstream cmdstream;
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oparser.parseArg(cmdstream, uris, argc, argv);
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{
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// first evaluate --no-conf and --conf-path options.
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Option op;
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oparser.parse(op, cmdstream);
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noConf = op.getAsBool(PREF_NO_CONF);
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ucfname = op.get(PREF_CONF_PATH);
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if(op.defined("version")) {
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showVersion();
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exit(error_code::FINISHED);
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}
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if(op.defined("help")) {
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std::string keyword;
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if(op.get("help").empty()) {
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keyword = TAG_BASIC;
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} else {
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keyword = op.get("help");
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if(util::startsWith(keyword, "--")) {
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keyword = keyword.substr(2);
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}
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std::string::size_type eqpos = keyword.find("=");
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if(eqpos != std::string::npos) {
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keyword = keyword.substr(0, eqpos);
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}
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}
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showUsage(keyword, oparser);
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exit(error_code::FINISHED);
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}
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}
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oparser.parseDefaultValues(op);
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if(!noConf) {
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std::string cfname =
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ucfname.empty() ?
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oparser.findByName(PREF_CONF_PATH)->getDefaultValue():
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ucfname;
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if(File(cfname).isFile()) {
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std::stringstream ss;
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{
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BufferedFile fp(cfname, BufferedFile::READ);
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if(fp) {
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fp.transfer(ss);
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}
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}
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try {
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oparser.parse(op, ss);
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} catch(OptionHandlerException& e) {
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global::cerr()->printf("Parse error in %s\n%s\n",
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cfname.c_str(),
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e.stackTrace().c_str());
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SharedHandle<OptionHandler> h = oparser.findByName(e.getOptionName());
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if(h) {
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global::cerr()->printf
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("Usage:\n%s\n",
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oparser.findByName(e.getOptionName())->getDescription().c_str());
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}
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exit(e.getErrorCode());
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} catch(Exception& e) {
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global::cerr()->printf("Parse error in %s\n%s\n",
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cfname.c_str(),
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e.stackTrace().c_str());
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exit(e.getErrorCode());
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}
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} else if(!ucfname.empty()) {
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global::cerr()->printf("Configuration file %s is not found.\n",
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cfname.c_str());
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showUsage(TAG_HELP, oparser);
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exit(error_code::UNKNOWN_ERROR);
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}
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}
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// Override configuration with environment variables.
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overrideWithEnv(op, oparser, PREF_HTTP_PROXY, "http_proxy");
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overrideWithEnv(op, oparser, PREF_HTTPS_PROXY, "https_proxy");
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overrideWithEnv(op, oparser, PREF_FTP_PROXY, "ftp_proxy");
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overrideWithEnv(op, oparser, PREF_ALL_PROXY, "all_proxy");
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overrideWithEnv(op, oparser, PREF_NO_PROXY, "no_proxy");
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// we must clear eof bit and seek to the beginning of the buffer.
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cmdstream.clear();
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cmdstream.seekg(0, std::ios::beg);
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// finaly let's parse and store command-iine options.
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oparser.parse(op, cmdstream);
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#ifdef __MINGW32__
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for(std::map<std::string, std::string>::iterator i = op.begin();
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i != op.end(); ++i) {
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if(!util::isUtf8((*i).second)) {
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(*i).second = nativeToUtf8((*i).second);
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}
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}
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#endif // __MINGW32__
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} catch(OptionHandlerException& e) {
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global::cerr()->printf("%s\n", e.stackTrace().c_str());
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SharedHandle<OptionHandler> h = oparser.findByName(e.getOptionName());
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if(h) {
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std::ostringstream ss;
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ss << *h;
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global::cerr()->printf("Usage:\n%s\n", ss.str().c_str());
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}
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exit(e.getErrorCode());
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} catch(Exception& e) {
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global::cerr()->printf("%s\n", e.stackTrace().c_str());
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showUsage(TAG_HELP, oparser);
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exit(e.getErrorCode());
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}
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if(!op.getAsBool(PREF_ENABLE_RPC) &&
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#ifdef ENABLE_BITTORRENT
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op.blank(PREF_TORRENT_FILE) &&
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#endif // ENABLE_BITTORRENT
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#ifdef ENABLE_METALINK
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op.blank(PREF_METALINK_FILE) &&
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#endif // ENABLE_METALINK
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op.blank(PREF_INPUT_FILE)) {
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if(uris.empty()) {
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global::cerr()->printf("%s\n", MSG_URI_REQUIRED);
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showUsage(TAG_HELP, oparser);
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exit(error_code::UNKNOWN_ERROR);
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}
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}
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if(op.getAsBool(PREF_DAEMON)) {
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if(daemon(0, 0) < 0) {
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perror(MSG_DAEMON_FAILED);
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exit(error_code::UNKNOWN_ERROR);
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}
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}
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}
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} // namespace aria2
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