208 lines
7.0 KiB
C++
208 lines
7.0 KiB
C++
#include <iostream>
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#include <string>
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#include <sstream>
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#include <cstring>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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const int PORT = 8089;
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std::string getHtmlPage(const std::string& path) {
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if (path == "/" || path == "/index") {
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return R"(<!DOCTYPE html>
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<html lang="de">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>C++ Webserver</title>
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<style>
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* { box-sizing: border-box; margin: 0; padding: 0; }
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body {
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font-family: 'Segoe UI', sans-serif;
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background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
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min-height: 100vh;
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display: flex;
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align-items: center;
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justify-content: center;
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color: #eee;
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}
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.card {
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background: rgba(255,255,255,0.08);
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backdrop-filter: blur(10px);
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border: 1px solid rgba(255,255,255,0.15);
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border-radius: 20px;
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padding: 50px 60px;
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max-width: 600px;
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text-align: center;
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box-shadow: 0 20px 60px rgba(0,0,0,0.4);
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}
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.badge {
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background: #e94560;
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color: white;
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padding: 6px 16px;
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border-radius: 20px;
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font-size: 0.8em;
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letter-spacing: 1px;
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text-transform: uppercase;
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display: inline-block;
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margin-bottom: 20px;
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}
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h1 { font-size: 2.5em; margin-bottom: 15px; }
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p { color: rgba(255,255,255,0.7); line-height: 1.7; margin-bottom: 25px; }
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.links a {
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display: inline-block;
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margin: 8px;
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padding: 12px 28px;
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background: #e94560;
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color: white;
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text-decoration: none;
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border-radius: 10px;
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transition: transform 0.2s, background 0.2s;
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}
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.links a:hover { transform: translateY(-2px); background: #c73652; }
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.links a.secondary {
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background: rgba(255,255,255,0.1);
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border: 1px solid rgba(255,255,255,0.2);
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}
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.links a.secondary:hover { background: rgba(255,255,255,0.2); }
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code {
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background: rgba(0,0,0,0.3);
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padding: 3px 8px;
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border-radius: 5px;
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font-size: 0.9em;
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color: #7ec8e3;
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}
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</style>
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</head>
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<body>
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<div class="card">
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<div class="badge">C++ HTTP Server</div>
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<h1>🌐 Hallo, Welt!</h1>
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<p>
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Dieser Webserver wurde komplett in <strong>reinem C++</strong> geschrieben —
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ohne externe Bibliotheken. Er nutzt direkt die
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<code>POSIX Socket API</code> des Betriebssystems.
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</p>
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<div class="links">
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<a href="/">🏠 Startseite</a>
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<a href="/info" class="secondary">ℹ️ Server-Info</a>
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<a href="/zeit" class="secondary">🕐 Uhrzeit</a>
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</div>
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</div>
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</body>
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</html>)";
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} else if (path == "/info") {
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return R"(<!DOCTYPE html>
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<html lang="de">
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<head>
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<meta charset="UTF-8">
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<title>Server Info</title>
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<style>
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body { font-family: monospace; background: #0d1117; color: #c9d1d9; padding: 40px; }
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h1 { color: #58a6ff; }
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table { border-collapse: collapse; margin-top: 20px; }
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td, th { padding: 10px 20px; border: 1px solid #30363d; }
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th { background: #161b22; color: #58a6ff; }
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a { color: #58a6ff; }
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</style>
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</head>
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<body>
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<h1>🔧 Server-Informationen</h1>
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<table>
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<tr><th>Eigenschaft</th><th>Wert</th></tr>
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<tr><td>Sprache</td><td>C++ (ISO C++17)</td></tr>
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<tr><td>Bibliotheken</td><td>Nur POSIX Standard (sys/socket.h)</td></tr>
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<tr><td>Port</td><td>8080</td></tr>
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<tr><td>Protokoll</td><td>HTTP/1.0</td></tr>
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<tr><td>Plattform</td><td>Linux</td></tr>
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</table>
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<p style="margin-top:20px"><a href="/">← Zurück</a></p>
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</body>
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</html>)";
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} else if (path == "/zeit") {
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time_t now = time(nullptr);
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std::string zeit = std::string(ctime(&now));
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return "<!DOCTYPE html><html lang='de'><head><meta charset='UTF-8'><title>Zeit</title>"
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"<style>body{font-family:sans-serif;background:#0d1117;color:#c9d1d9;padding:40px;}"
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"h1{color:#58a6ff;} a{color:#58a6ff;}</style></head><body>"
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"<h1>🕐 Aktuelle Serverzeit</h1><p style='font-size:1.5em'>" + zeit + "</p>"
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"<p><a href='/'>← Zurück</a></p></body></html>";
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}
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return R"(<!DOCTYPE html>
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<html lang="de"><head><meta charset="UTF-8"><title>404</title>
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<style>body{font-family:sans-serif;background:#0d1117;color:#c9d1d9;
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text-align:center;padding:80px;}h1{font-size:5em;color:#e94560;}
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a{color:#58a6ff;}</style></head>
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<body><h1>404</h1><p>Seite nicht gefunden.</p><p><a href="/">Startseite</a></p>
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</body></html>)";
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}
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std::string buildResponse(const std::string& path) {
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std::string body = getHtmlPage(path);
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std::string status = (path == "/" || path == "/info" || path == "/zeit")
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? "200 OK" : "404 Not Found";
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std::ostringstream response;
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response << "HTTP/1.0 " << status << "\r\n"
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<< "Content-Type: text/html; charset=UTF-8\r\n"
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<< "Content-Length: " << body.size() << "\r\n"
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<< "Connection: close\r\n"
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<< "\r\n"
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<< body;
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return response.str();
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}
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int main() {
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int server_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (server_fd < 0) { std::cerr << "Socket-Fehler\n"; return 1; }
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int opt = 1;
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setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
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sockaddr_in address{};
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address.sin_family = AF_INET;
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address.sin_addr.s_addr = INADDR_ANY;
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address.sin_port = htons(PORT);
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if (bind(server_fd, (sockaddr*)&address, sizeof(address)) < 0) {
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std::cerr << "Bind-Fehler\n"; return 1;
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}
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if (listen(server_fd, 10) < 0) {
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std::cerr << "Listen-Fehler\n"; return 1;
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}
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std::cout << "Server laeuft auf http://localhost:" << PORT << "\n";
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std::cout << "Seiten: / /info /zeit\n";
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std::cout << "Beenden mit Ctrl+C\n\n";
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while (true) {
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int client_fd = accept(server_fd, nullptr, nullptr);
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if (client_fd < 0) continue;
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char buffer[4096] = {};
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read(client_fd, buffer, sizeof(buffer) - 1);
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// HTTP-Anfrage parsen: "GET /path HTTP/1.x"
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std::string request(buffer);
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std::string path = "/";
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size_t start = request.find(' ');
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if (start != std::string::npos) {
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size_t end = request.find(' ', start + 1);
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if (end != std::string::npos)
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path = request.substr(start + 1, end - start - 1);
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}
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std::cout << "Anfrage: " << path << "\n";
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std::string response = buildResponse(path);
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send(client_fd, response.c_str(), response.size(), 0);
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close(client_fd);
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}
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close(server_fd);
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return 0;
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}
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