这不是编写HTTP请求的正确方法。以下代码更正确：
connect(m_qnam, SIGNAL(finished(QNetworkReply*)), this, SLOT(handleNetworkData(QNetworkReply*)));connect(m_qnam,SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)), this, SLOT(handleSSLErrors(QNetworkReply*)));// Build your JSON string as usualQByteArray jsonString = "{"method":"AuthenticatePlain","loginName":"username@domain.com","password":"mypass"}";// For your "Content-Length" headerQByteArray postDataSize = QByteArray::number(jsonString.size());// Time for building your requestQUrl serviceURL("https://www.superService.com/api/1.7/ssapi.asmx");QNetworkRequest request(serviceURL);// Add the headers specifying their names and their values with the following method : void QNetworkRequest::setRawHeader(const QByteArray & headerName, const QByteArray & headerValue);request.setRawHeader("User-Agent", "My app name v0.1");request.setRawHeader("X-Custom-User-Agent", "My app name v0.1");request.setRawHeader("Content-Type", "application/json");request.setRawHeader("Content-Length", postDataSize);// Use QNetworkReply * QNetworkAccessManager::post(const QNetworkRequest & request, const QByteArray & data); to send your request. Qt will rearrange everything correctly.QNetworkReply * reply = m_qnam->post(request, jsonString);
