{"id":35228,"date":"2025-05-03T11:05:46","date_gmt":"2025-05-03T03:05:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/35228.html"},"modified":"2025-05-03T11:05:46","modified_gmt":"2025-05-03T03:05:46","slug":"qt%e5%88%b6%e4%bd%9c%e5%a4%84%e7%90%86http-get%e8%af%b7%e6%b1%82%e7%9a%84%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/35228.html","title":{"rendered":"QT\u5236\u4f5c\u5904\u7406HTTP get\u8bf7\u6c42\u7684\u670d\u52a1\u5668"},"content":{"rendered":"

\u672c\u4eba\u5728\u5b66\u4e60QT\u65f6，\u60f3\u7528QT\u5236\u4f5c\u4e00\u4e2a\u53ef\u4ee5\u5904\u7406HTTP\u8bf7\u6c42\u7684\u670d\u52a1\u5668，\u90a3\u4e48\u8fd9\u4e2a\u5c0f\u9879\u76ee\u8be5\u600e\u4e48\u5b9e\u73b0\u5462，<\/p>\n

\u9996\u5148，\u6211\u4eec\u9700\u8981\u5728\u9879\u76ee\u7684pro\u6587\u4ef6\u4e2d\u6dfb\u52a0 network，\u56e0\u4e3a\u5176\u4e2d\u5305\u542b\u4e86\u8bb8\u591a\u7f51\u7edc\u7f16\u7a0b\u7684\u5934\u6587\u4ef6\u3002\u5982\u56fe\u6240\u793a：<\/p>\n

\"\"<\/p>\n

\u5bfc\u5165\u4e4b\u540e\u00b7，\u6211\u4eec\u5c31\u8981\u601d\u8003，\u8981\u60f3\u5904\u7406HTTP\u8bf7\u6c42，\u9996\u5148\u8981\u8ba9\u6d4f\u89c8\u5668\u4e0e\u670d\u52a1\u5668\u5efa\u7acbTCP\u8fde\u63a5，\u53ea\u6709\u5efa\u7acb\u8fde\u63a5\u540e，\u4e8c\u8005\u624d\u80fd\u6536\u53d1\u6570\u636e\u3002\u56e0\u6b64\u9996\u5148，\u6211\u4eec\u5148\u5efa\u7acbTCP\u8fde\u63a5，\u5f53\u6211\u4eec\u5728linux\u4e2d\u5efa\u7acbTCP\u8fde\u63a5\u65f6，\u6211\u4eec\u901a\u5e38\u7684\u6b65\u9aa4\u662f<\/p>\n

1.\u521b\u5efa\u7528\u4e8e\u76d1\u542c\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26<\/p>\n

2.\u5c06\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0e\u672c\u673aip\u548c\u9884\u8bbe\u7aef\u53e3（\u4f8b\u598210000）\u8fdb\u884c\u7ed1\u5b9a<\/p>\n

3.\u76d1\u542c\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5f53\u6709\u65b0\u8fde\u63a5\u65f6，\u521b\u5efa\u7528\u4e8e\u901a\u4fe1\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n

\u8fd9\u65f6\u6211\u4eec\u7684TCP\u8fde\u63a5\u5c31\u7b97\u5b8c\u6210\u4e86，\u5728\u6b64\u4e4b\u540e\u5c31\u53ef\u4ee5\u8fdb\u884c\u901a\u4fe1\u4e86\u3002<\/p>\n

\u4f46\u662f\u5bf9\u4e8eQT\u6765\u8bf4，\u6211\u4eec\u5e76\u4e0d\u9700\u8981\u505a\u8fd9\u4e48\u591a\u64cd\u4f5c，\u6211\u4eec\u53ea\u9700\u8981\u8c03\u7528QTcpServer\u7c7b\u4e2d\u7684listen\u51fd\u6570\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u6307\u5b9aIP\u7684\u7aef\u53e3\u7684\u76d1\u542c，\u5176\u53c2\u6570\u4e3a （IP，\u7aef\u53e3），\u4ee5\u672c\u5730\u4e3a\u670d\u52a1\u5668\u4e3a\u4f8b（\u5f53\u7136\u8fd9\u79cd\u65b9\u6cd5\u53ea\u6709\u5728\u540c\u4e00\u5c40\u57df\u7f51\u4e2d\u522b\u4eba\u624d\u53ef\u4ee5\u8bbf\u95ee\u95ee\u5230，\u8981\u60f3\u5b9e\u73b0\u6240\u6709\u4eba\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5230\u7684\u670d\u52a1\u5668，\u53ef\u4ee5\u5c06\u7a0b\u5e8f\u5728\u4e91\u7535\u8111\u4e0a\u8fd0\u884c，\u8fd9\u6837\u5c31\u53ef\u4ee5\u901a\u8fc7\u516c\u7f51IP\u6240\u6709\u4eba\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5230）<\/p>\n

QTcpServer::listen(QHostAddress::Any, 10000);\/\/\u672c\u673aip,\u7aef\u53e3\u53f7\u4e3a10000 <\/p>\n

\u540c\u65f6，\u5f53\u6709\u65b0\u7684\u5ba2\u6237\u7aef\u53d1\u9001\u8fde\u63a5\u8bf7\u6c42\u65f6，QTcpserver\u4f1a\u81ea\u52a8\u7684\u8c03\u7528incomingConnection\u51fd\u6570，\u4f20\u9012\u7684\u53c2\u6570（socketDescriptor）\u662f\u63a5\u53d7\u7684\u8fde\u63a5\u7684\u672c\u673a\u5957\u63a5\u5b57\u63cf\u8ff0\u7b26\u3002\u57fa\u672c\u5b9e\u73b0\u521b\u5efa\u4e00\u4e2a QTcpSocket，<\/p>\n

\u8981\u60f3\u5f97\u5230\u7528\u4e8e\u901a\u4fe1\u7684\u5957\u63a5\u5b57，\u53ef\u4ee5\u7528\u4ee5\u4e0b\u65b9\u5f0f\u5f97\u5230：<\/p>\n

QTcpSocket* socket=new QTcpSocket;
\n socket->setSocketDescriptor(socketDescriptor); <\/p>\n

\u90a3\u4e48\u5f97\u5230\u7528\u4e8e\u901a\u4fe1\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u540e，TCP\u8fde\u63a5\u5c31\u5efa\u7acb\u6210\u529f\u4e86，\u63a5\u4e0b\u6765\u6211\u4eec\u8981\u5b9e\u73b0HTTP\u8bf7\u6c42\u7684\u5904\u7406\u548cHTTP\u54cd\u5e94\u7684\u53d1\u9001\u3002<\/p>\n

\u8981\u60f3\u5904\u7406HTTP\u8bf7\u6c42（\u8fd9\u91cc\u6211\u4eec\u53ea\u8ba8\u8bbaget\u8bf7\u6c42），\u6211\u4eec\u9996\u5148\u8981\u77e5\u9053HTTP\u8bf7\u6c42\u5230\u5e95\u662f\u5728\u8bf7\u6c42\u4ec0\u4e48，\u4e5f\u5c31\u662f\u5bf9\u65b9\u53d1\u8fc7\u6765\u7684\u4e00\u5806\u6570\u636e\u5230\u5e95\u60f3\u8868\u8fbe\u4ec0\u4e48，\u6211\u4eec\u5c31\u8981\u8bfb\u61c2HTTP\u8bf7\u6c42\u6570\u636e\u7684\u683c\u5f0f，\u4e0b\u56fe\u662f\u6211\u5728\u670d\u52a1\u5668\u5f97\u5230\u7684\u8bf7\u6c42\u6570\u636e,\u6bcf\u4e00\u884c\u4ee5\\\\r\\\\n\u7ed3\u5c3e：<\/p>\n

\"\"<\/p>\n

\u7b2c\u4e00\u884c\u8868\u793a\u8bf7\u6c42\u884c，\u5176\u6570\u636e\u5206\u522b\u8868\u793a\u00a0 \u00a0 \u00a0\u8bf7\u6c42\u6570\u636e\u7684\u65b9\u6cd5\u00a0 \u8bf7\u6c42\u7684\u8def\u5f84\u00a0 http\u534f\u8bae\u7248\u672c<\/p>\n

\u7b2c\u4e8c\u884c\u81f3\u7a7a\u884c\u4e4b\u524d\u8868\u793a\u8bf7\u6c42\u5934 ，\u6bcf\u4e00\u884c\u90fd\u6709\u8bf7\u6c42\u7684\u5c5e\u6027\u00a0<\/p>\n

\u5bf9\u4e8eget\u8bf7\u6c42，http\u8bf7\u6c42\u62a5\u6587\u4ee5\u7a7a\u884c\u7ed3\u5c3e（\u5373\\\\r\\\\n）\u3002<\/p>\n<\/p>\n

\u77e5\u9053\u4e86HTTP\u7684\u8bf7\u6c42\u683c\u5f0f，\u6211\u4eec\u5c31\u80fd\u4ece\u8bf7\u6c42\u4e2d\u83b7\u53d6\u5230\u6211\u4eec\u60f3\u8981\u7684\u6570\u636e，\u9996\u5148，\u6211\u4eec\u8981\u77e5\u9053\u8bf7\u6c42\u4f7f\u7528\u7684\u662fget\u8fd8\u662fpost\u65b9\u6cd5\u6765\u8bf7\u6c42\u6570\u636e，\u5176\u6b21\u6211\u4eec\u9700\u8981\u77e5\u9053\u5bf9\u65b9\u662f\u60f3\u8981\u83b7\u53d6\u7684\u6570\u636e\u662f\u4ec0\u4e48，\u81f3\u4e8e\u5176\u4ed6\u7684\u6570\u636e，\u6211\u4eec\u6ca1\u6709\u5fc5\u8981\u4fdd\u5b58\u3002<\/p>\n

\u5176\u4ee3\u7801\u5b9e\u73b0\u5982\u4e0b：<\/p>\n

QByteArray &buffer = buffers[socket];
\nbuffer.append(socket->readAll()); \/\/ \u8bfb\u53d6\u6570\u636e\u5230\u7f13\u5b58<\/p>\n

\/\/ \u68c0\u67e5\u662f\u5426\u63a5\u6536\u5230\u5b8c\u6574\u7684HTTP\u5934\u90e8（\u4ee5\\\\r\\\\n\\\\r\\\\n\u7ed3\u5c3e）
\nint endOfHeader = buffer.indexOf("\\\\r\\\\n\\\\r\\\\n");
\nif (endOfHeader == -1) return; \/\/ \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u540e\u7eed\u6570\u636e<\/p>\n

QString requestHeader = buffer.left(endOfHeader); \/\/ \u63d0\u53d6\u5934\u90e8
\nbuffer.clear(); \/\/ \u6e05\u7a7a\u7f13\u5b58<\/p>\n

QTextStream stream(&requestHeader, QIODevice::ReadOnly);
\nQString requestLine = stream.readLine(); \/\/ \u89e3\u6790\u8bf7\u6c42\u884c
\nQStringList parts = requestLine.split(' ');
\nif (parts.size() < 3) {
\n sendResponse(socket, 400, "Bad Request", "text\/html", "<h1>400 Bad Request<\/h1>");
\n return;
\n}<\/p>\n

QString method = parts[0].toUpper();
\nQString path = parts[1]; <\/p>\n

\u77e5\u9053\u4e86\u5bf9\u65b9\u60f3\u8981\u7684\u662f\u4ec0\u4e48，\u6211\u4eec\u5c31\u8981\u5224\u65ad\u6211\u4eec\u662f\u5426\u6709\u5bf9\u5e94\u7684\u6587\u4ef6\u6216\u76ee\u5f55，\u5982\u679c\u6ca1\u6709\u6211\u4eec\u5c31\u8fd4\u56de\u4e00\u4e2a404 NotFound\u7f51\u9875，\u5982\u679c\u6709，\u6211\u4eec\u5c31\u8bfb\u53d6\u5bf9\u5e94\u7684\u6587\u4ef6\u7136\u540e\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002\u90a3\u4e48\u6211\u4eec\u53d1\u9001\u4e5f\u6709\u683c\u5f0f\u8981\u6c42，\u8981\u4e0d\u7136\u6d4f\u89c8\u5668\u4e5f\u4e0d\u77e5\u9053\u6211\u4eec\u53d1\u8fc7\u6765\u7684\u662f\u4ec0\u4e48\u4e1c\u897f，<\/p>\n

\u5bf9\u5e94\u7684\u683c\u5f0f\u5c31\u662f：<\/p>\n

\u72b6\u6001\u884c：HTTP\/1.1 200 OK \u00a0 (\u5176\u4e2d\u7684200\u8868\u793a\u72b6\u6001\u7801)<\/p>\n

\u54cd\u5e94\u5934： Content-Type:\u00a0 \u00a0 \u00a0 （\u7528\u6765\u8868\u8ff0\u54cd\u5e94\u6570\u636e\u7684\u4e00\u4e9b\u5c5e\u6027,\u5176\u4e2d\u5185\u5bb9\u7c7b\u578b\u662f\u5fc5\u987b\u5199\u5165\u5176\u4e2d\u7684）<\/p>\n

\u7a7a\u884c：\\\\r\\\\n<\/p>\n

\u54cd\u5e94\u4f53：（\u771f\u6b63\u54cd\u5e94\u60f3\u8981\u4f20\u9012\u7ed9\u6d4f\u89c8\u5668\u7684\u6570\u636e）<\/p>\n

\u5176\u4ee3\u7801\u5b9e\u73b0\u5982\u4e0b：<\/p>\n

QByteArray response;
\n response.append(QString("HTTP\/1.1 %1 %2\\\\r\\\\n").arg(statusCode).arg(statusText).toUtf8());
\n response.append(QString("Content-Type: %1\\\\r\\\\n").arg(contentType).toUtf8());
\n response.append(QString("Content-Length: %1\\\\r\\\\n").arg(content.toUtf8().size()).toUtf8());
\n response.append("Connection: close\\\\r\\\\n"); \/\/ \u53d1\u9001\u540e\u5173\u95ed\u8fde\u63a5
\n response.append("\\\\r\\\\n"); \/\/ \u5934\u90e8\u7ed3\u675f
\n response.append(content.toUtf8()); \/\/ \u6dfb\u52a0\u5185\u5bb9
\n socket->write(response); \/\/ \u53d1\u9001\u54cd\u5e94 <\/p>\n

\u81f3\u6b64，HTTP\u6570\u636e\u7684\u6536\u53d1\u5747\u5df2\u5b9e\u73b0\u3002<\/p>\n

\u6700\u540e\u9644\u4e0a\u5b8c\u6574\u7684\u4ee3\u7801：<\/p>\n

\u5934\u6587\u4ef6：<\/p>\n

class HttpServer : public QTcpServer
\n{
\n Q_OBJECT
\npublic:
\n explicit HttpServer(QObject *parent = nullptr);
\n void startServer();
\n virtual void incomingConnection(qintptr socketDescriptor);<\/p>\n

protected slots:
\n \/\/ void handleNewConnection();
\n void readRequest();
\n void sendResponse(QTcpSocket *socket, int statusCode, const QString &statusText, const QString &contentType, const QString &content);
\nprivate:
\n QMap<QTcpSocket*, QByteArray> buffers; \/\/ \u7528\u4e8e\u7f13\u5b58\u6bcf\u4e2asocket\u7684\u6570\u636e
\n}; <\/p>\n

cpp\u6587\u4ef6：<\/p>\n

HttpServer::HttpServer(QObject *parent) : QTcpServer(parent)
\n{
\n}<\/p>\n

void HttpServer::startServer()
\n{
\n if (!this->listen(QHostAddress::Any, 10000)) {
\n qDebug() << "Could not start server";
\n } else {
\n qDebug() << "Listening on port 10000…";
\n }
\n}<\/p>\n

void HttpServer::incomingConnection(qintptr socketDescriptor)
\n{<\/p>\n

QTcpSocket* socket=new QTcpSocket;
\n socket->setSocketDescriptor(socketDescriptor);
\n connect(socket, &QTcpSocket::readyRead, this, &HttpServer::readRequest);
\n connect(socket, &QTcpSocket::disconnected, socket, &QTcpSocket::deleteLater);
\n connect(socket, &QTcpSocket::disconnected, this, [this, socket]() {
\n buffers.remove(socket); \/\/ \u6e05\u7406\u7f13\u5b58
\n });
\n buffers.insert(socket, QByteArray()); \/\/ \u521d\u59cb\u5316\u7f13\u5b58
\n qDebug() << "New connection from" << socket->peerAddress().toString();
\n}<\/p>\n

void HttpServer::readRequest()
\n{
\n qDebug()<<"\u51c6\u5907\u89e3\u6790\u8bf7\u6c42";
\n QTcpSocket *socket = qobject_cast<QTcpSocket*>(sender());
\n if (!socket) return;<\/p>\n

QByteArray &buffer = buffers[socket];
\n buffer.append(socket->readAll()); \/\/ \u8bfb\u53d6\u6570\u636e\u5230\u7f13\u5b58<\/p>\n

\/\/ \u68c0\u67e5\u662f\u5426\u63a5\u6536\u5230\u5b8c\u6574\u7684HTTP\u5934\u90e8（\u4ee5\\\\r\\\\n\\\\r\\\\n\u7ed3\u5c3e）
\n int endOfHeader = buffer.indexOf("\\\\r\\\\n\\\\r\\\\n");
\n if (endOfHeader == -1) return; \/\/ \u6570\u636e\u4e0d\u5b8c\u6574，\u7b49\u5f85\u540e\u7eed\u6570\u636e<\/p>\n

QString requestHeader = buffer.left(endOfHeader); \/\/ \u63d0\u53d6\u5934\u90e8
\n buffer.clear(); \/\/ \u6e05\u7a7a\u7f13\u5b58（\u672c\u4f8b\u4e2d\u5904\u7406\u5b8c\u5373\u5173\u95ed\u8fde\u63a5）<\/p>\n

QTextStream stream(&requestHeader, QIODevice::ReadOnly);
\n QString requestLine = stream.readLine(); \/\/ \u89e3\u6790\u8bf7\u6c42\u884c
\n QStringList parts = requestLine.split(' ');
\n if (parts.size() < 3) {
\n sendResponse(socket, 400, "Bad Request", "text\/html", "<h1>400 Bad Request<\/h1>");
\n return;
\n }<\/p>\n

QString method = parts[0].toUpper();
\n QString path = parts[1];<\/p>\n

\/\/ \u4ec5\u5904\u7406GET\u8bf7\u6c42
\n if (method != "GET") {
\n sendResponse(socket, 501, "Not Implemented", "text\/html", "<h1>501 Not Implemented<\/h1>");
\n return;
\n }<\/p>\n

\/\/ \u6839\u636e\u8def\u5f84\u751f\u6210\u54cd\u5e94\u5185\u5bb9
\n QString content;
\n QString contentType = "text\/html";
\n int statusCode = 200;
\n QString statusText = "OK";<\/p>\n

if (path == "\/") {
\n content = "tem: 23";
\n } else if (path == "\/test") {
\n content = "<h1>Test Page<\/h1><p>This is a test response.<\/p>";
\n } else if (path.startsWith("\/api\/data")) {
\n contentType = "application\/json";
\n content = "{\\\\"message\\\\": \\\\"Hello, World!\\\\"}";
\n } else {
\n statusCode = 404;
\n statusText = "Not Found";
\n content = "<h1>404 Not Found<\/h1>";
\n }
\n sendResponse(socket, statusCode, statusText, contentType, content);
\n}<\/p>\n

void HttpServer::sendResponse(QTcpSocket *socket, int statusCode, const QString &statusText, const QString &contentType, const QString &content)
\n{
\n QByteArray response;
\n response.append(QString("HTTP\/1.1 %1 %2\\\\r\\\\n").arg(statusCode).arg(statusText).toUtf8());
\n response.append(QString("Content-Type: %1\\\\r\\\\n").arg(contentType).toUtf8());
\n response.append(QString("Content-Length: %1\\\\r\\\\n").arg(content.toUtf8().size()).toUtf8());
\n response.append("Connection: close\\\\r\\\\n"); \/\/ \u53d1\u9001\u540e\u5173\u95ed\u8fde\u63a5
\n response.append("\\\\r\\\\n"); \/\/ \u5934\u90e8\u7ed3\u675f
\n response.append(content.toUtf8()); \/\/ \u6dfb\u52a0\u5185\u5bb9<\/p>\n

socket->write(response); \/\/ \u53d1\u9001\u54cd\u5e94
\n socket->disconnectFromHost(); \/\/ \u65ad\u5f00\u8fde\u63a5
\n}<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

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