web端：

<?php

 $c = $GLOBALS['HTTP_RAW_POST_DATA'];

 $n = $_GET["filename"];

 $fp = fopen($n,'w+');

 fwrite($fp, $c, strlen($c));

 fclose($fp);

?>

QT端：

.h:

private:

  QNetworkAccessManager *_uploadManager;

  QNetworkReply *_reply;

  char* m_buf;

private slots:

  void replyFinished( QNetworkReply* );

  void upLoadError(QNetworkReply::NetworkError errorCode);

  void OnUploadProgress( qint64 bytesSent, qint64 bytesTotal );

.cpp:

_uploadManager = new QNetworkAccessManager(this);

  connect(_uploadManager,SIGNAL(finished(QNetworkReply*)),SLOT(replyFinished(QNetworkReply*)));

  m_buf = NULL;

  QFile file("d:/a.jpg");

  file.open(QIODevice::ReadOnly);

  int file_len = file.size();

  QDataStream in(&file);

  m_buf = new char[file_len];

  in.readRawData( m_buf, file_len);

  file.close();

  QNetworkRequest request(QUrl(tr(http://localhost/up.php?act=up&filename=a.jpg)));

  request.setHeader(QNetworkRequest::ContentTypeHeader, "application/octet-stream");

  QByteArray arr = QByteArray(m_buf, file_len);

  _reply = _uploadManager->post(request , arr);

  connect(_reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(upLoadError(QNetworkReply::NetworkError)));

  connect(_reply, SIGNAL(uploadProgress ( qint64 ,qint64 )), this, SLOT( OnUploadProgress(qint64 ,qint64 )));