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gateway/cgi.cpp

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+/* Copyright (c) 2018 Albert S.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#include "cgi.h"
+#include "../utils.h"
+#include <cstdlib>
+#include <string>
+#include <memory>
+#include <iostream>
+Cgi::Cgi(const Config &c)
+{
+	this->config = &c;
+}
+
+bool Cgi::keepReading()
+{
+	return !this->responseSent;
+}
+
+Request Cgi::readRequest()
+{
+
+	std::string request_uri = utils::getenv("REQUEST_URI");
+	if(request_uri == "")
+	{
+		throw std::runtime_error("REQUEST_URI is empty");
+	}
+
+	Request result{request_uri};
+
+	std::string method = utils::getenv("REQUEST_METHOD");
+	if(method == "POST")
+	{
+		std::string content_type = utils::getenv("CONTENT_TYPE");
+		if(content_type != "application/x-www-form-urlencoded")
+		{
+			throw "invalid content_type";
+		}
+		std::string content_length = utils::getenv("CONTENT_LENGTH");
+		int cl = std::stoi(content_length);
+		std::unique_ptr<char[]> ptr(new char[cl + 1]);
+		std::cin.get(ptr.get(), cl + 1);
+
+		std::string post_data{ptr.get()};
+	}
+
+	result.initCookies(utils::getenv("HTTP_COOKIE"));
+	result.setIp(utils::getenv("REMOTE_ADDR"));
+	result.setUseragent(utils::getenv("HTTP_USER_AGENT"));
+
+	return result;
+}
+
+void Cgi::work(RequestWorker &worker)
+{
+	while(this->keepReading())
+	{
+		Request req = readRequest();
+		sendResponse(worker.processRequest(req));
+	}
+}
+
+void Cgi::sendResponse(const Response &r)
+{
+	std::cout << "Status: " << r.getStatus() << "\r\n";
+	std::cout << "Content-Type: " << r.getContentType() << "\r\n";
+	for(auto header : r.getResponseHeaders())
+	{
+		std::string key = header.first;
+		std::string second = header.second;
+		if(key.back() != ':')
+		{
+			std::cout << key << ":" << second << "\r\n";
+		}
+		else
+		{
+			std::cout << key << second << "\r\n";
+		}
+	}
+	for(const Cookie &c : r.getCookies())
+	{
+		std::cout << "Set-Cookie: " << c.createHeaderValue() << "\r\n";
+	}
+	std::cout << "\r\n";
+	std::cout << r.getBody();
+	std::cout.flush();
+	this->responseSent = true;
+}
+
+Cgi::~Cgi()
+{
+}