112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
/* This file is part of libravatarserv.
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* Copyright © 2018 tastytea <tastytea@tastytea.de>
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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, version 3.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include <iostream>
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#include <algorithm>
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#include <cstdlib>
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#include "libravatarserv.hpp"
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using std::cout;
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using std::cerr;
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using namespace http;
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const Request http::parse_request(const string &request)
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{
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if (request.substr(0, 8) != "/avatar/" ||
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request.find("..", 8) != std::string::npos)
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{
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cout << "Status: 404 Not Found\n\n";
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cerr << "Error: Invalid URL.\n";
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std::exit(0);
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}
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uint16_t size = 80;
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string fallback;
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string digest = request.substr(8);
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std::transform(digest.begin(), digest.end(), digest.begin(), ::tolower);
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std::size_t pos_digest = digest.find('?');
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if (pos_digest != std::string::npos)
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{
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digest = digest.substr(0, pos_digest);
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pos_digest = digest.find('.');
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if (pos_digest != std::string::npos)
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{
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digest = digest.substr(0, pos_digest);
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}
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string answer;
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{
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answer = get_parameter(request, "s");
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if (!answer.empty())
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{
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try
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{
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size = static_cast<uint16_t>(std::stoul(answer));
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} catch (const std::exception &) {}
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}
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else
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{
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answer = get_parameter(request, "size");
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if (!answer.empty())
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{
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try
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{
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size = static_cast<uint16_t>(std::stoul(answer));
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} catch (const std::exception &) {}
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}
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}
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if (size > 512)
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{
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size = 512;
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}
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if (size < 1)
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{
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size = 1;
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}
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}
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{
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answer = get_parameter(request, "d");
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if (!answer.empty())
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{
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fallback = answer;
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}
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else
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{
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answer = get_parameter(request, "default");
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if (!answer.empty())
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{
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fallback = answer;
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}
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}
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}
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}
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return { digest, size, fallback };
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}
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const string http::get_parameter(const string &request, const string ¶meter)
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{
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std::size_t pos = request.find(parameter + "=");
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if (pos != std::string::npos)
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{
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pos += (1 + parameter.length());
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return request.substr(pos, request.find('&', pos));
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}
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return "";
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}
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