// Copyright 2021,2024 Jeisson Hidalgo-Cespedes. ECCI-UCR. CC BY 4.0 #include #include #include #include #include #include #include "FactWebApp.hpp" #include "HttpRequest.hpp" #include "HttpResponse.hpp" #include "Util.hpp" static const char* const PREFIX1 = "/fact"; static const char* const PREFIX2 = "/fact?number="; // TODO(you): Do not duplicate code for other apps, such as GoldbachWebApp. // Move common code to a base class for Factorization and Goldbach apps FactWebApp::FactWebApp() { } FactWebApp::~FactWebApp() { } void FactWebApp::start() { } void FactWebApp::stop() { } bool FactWebApp::handleHttpRequest(HttpRequest& httpRequest, HttpResponse& httpResponse) { // If the home page was asked // TODO(you): Homepage should be served by a HomeWebApp object if (httpRequest.getMethod() == "GET" && httpRequest.getURI() == "/") { return this->serveHomepage(httpRequest, httpResponse); } // If the request starts with "fact/" is for this web app if (httpRequest.getURI().rfind(PREFIX1, 0) == 0) { return this->serveFactorization(httpRequest, httpResponse); } // Unrecognized request return false; } bool FactWebApp::serveHomepage(HttpRequest& httpRequest , HttpResponse& httpResponse) { (void)httpRequest; // TODO(you): Homepage should be served by a HomeWebApp object // Build the body of the response this->serveHeader(httpResponse); httpResponse.body() << " \n" << "\n"; // Send the response to the client (user agent) return httpResponse.send(); } void FactWebApp::serveHeader(HttpResponse& httpResponse, const std::string& title) { // Set HTTP response metadata (headers) httpResponse.setHeader("Server", "AttoServer v1.0"); httpResponse.setHeader("Content-type", "text/html; charset=ascii"); // Serve document header and title httpResponse.body() << "\n" << "\n" << " \n" << " " << title << "\n" << " \n" << "

" << title << "

\n"; } bool FactWebApp::serveFactorization(HttpRequest& httpRequest, HttpResponse& httpResponse) { // Replace %xx hexadecimal codes by their ASCII symbols const std::string& uri = Util::decodeURI(httpRequest.getURI()); // Build the body of the response this->serveHeader(httpResponse); httpResponse.body() << "

request: " << uri << "

\n" << "

\n"; this->factorizeNumbers(uri, httpResponse); httpResponse.body() << " \n" << "

\n" << "

Back

\n" << "\n"; // Send the response to the client (user agent) return httpResponse.send(); } void FactWebApp::factorizeNumbers(const std::string& uri, HttpResponse& httpResponse) { // Numbers were asked in the form "/fact/123,45,-7899" or "/fact?number=13" // Determine the position where numbers start size_t numbersStart = std::strlen(PREFIX1); if (uri.rfind(PREFIX2, 0) == 0) { numbersStart = std::strlen(PREFIX2); } // TODO(you): Use arbitrary precision for numbers larger than int64_t const std::vector& texts = Util::split(uri.substr(numbersStart), ",", true); // For each asked number, provide its prime factorization for (size_t index = 0; index < texts.size(); ++index) { try { // Convert the text to a number. Provide an error message if not size_t end = 0; const int64_t number = std::stoll(texts[index], &end); if (end != texts[index].length()) { throw std::runtime_error("invalid number " + texts[index]); } // Text was converted to number, provide its prime factorization // TODO(you): Implement actual factorization by a model object // TODO(you): Model objects must not use std::string, only numbers httpResponse.body() << "

" << number << " = 2⁴ * 3 * 5²\n"; } catch (const std::exception& exception) { // Text was not a valid number, report an error to user httpResponse.body() << "

" << texts[index] << ": invalid number\n"; } } }