标题通过HTTP post（PyQt）上传文件的问题

Question

我正面临上传文件的另一个问题

我无法将文件上传到php脚本，也无法读取输出

我认为uploader.upload（）很好，问题只是标题（Web服务器是Apache）

我的Uploader.upload（）让我发疯:(

知道代码有什么问题吗？

from PyQt4 import QtCore, QtGui, QtNetwork

class Window(QtGui.QWidget):
    def __init__(self, address):
        QtGui.QWidget.__init__(self)
        self.address = address
        self.table = QtGui.QTableWidget(self)
        header = self.table.horizontalHeader()
        header.setStretchLastSection(True)
        header.hide()
        self.table.setColumnCount(2)
        self.button = QtGui.QPushButton('Add Upload', self)
        self.button.clicked.connect(self.handleAddUpload)
        layout = QtGui.QVBoxLayout(self)
        layout.addWidget(self.table)
        layout.addWidget(self.button)
        self.netaccess = QtNetwork.QNetworkAccessManager(self)
        self._uploaders = {}

    def handleAddUpload(self):
        stream = QtCore.QFile('/home/me/icon.png')
        if stream.open(QtCore.QIODevice.ReadOnly):
            #data = stream.readAll()
            #stream.close()
            data = stream
            row = self.table.rowCount()
            button = QtGui.QPushButton('Abort', self.table)
            button.clicked.connect(lambda: self.handleAbort(row))
            progress = QtGui.QProgressBar(self.table)
            progress.setRange(0, data.size())
            self.table.setRowCount(row + 1)
            self.table.setCellWidget(row, 0, button)
            self.table.setCellWidget(row, 1, progress)
            uploader = self._uploaders[row] = Uploader(row, self.netaccess)
            uploader.uploadProgress.connect(self.handleUploadProgress)
            uploader.uploadFinished.connect(self.handleUploadFinished)
            uploader.upload(data, self.address)

    def handleUploadProgress(self, key, sent, total):
        print('upload(%d): %d [%d]' % (key, sent, total))
        progress = self.table.cellWidget(key, 1)
        progress.setValue(sent)

    def handleUploadFinished(self, key):
        print('upload(%d) finished' % key)
        button = self.table.cellWidget(key, 0)
        button.setDisabled(True)
        uploader = self._uploaders.pop(key)
        uploader.deleteLater()

    def handleAbort(self, key):
        try:
            self._uploaders[key].abort()
        except (KeyError, AttributeError):
            pass

class Uploader(QtCore.QObject):
    uploadProgress = QtCore.pyqtSignal(object, int, int)
    uploadFinished = QtCore.pyqtSignal(object)

    def __init__(self, key, parent):
        QtCore.QObject.__init__(self, parent)
        self._key = key
        self._reply = None

    def abort(self):
        if self._reply is not None:
            self._reply.abort()

    def upload(self, data, url):
        if self._reply is None:
            self._stream = data
            self._multiPart = QtNetwork.QHttpMultiPart(QtNetwork.QHttpMultiPart.FormDataType)
            imagePart = QtNetwork.QHttpPart()
            fileName = QtCore.QFileInfo(self._stream.fileName()).fileName()
            key = 'image_field'
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentDispositionHeader,
                     "form-data; name=\"%s\"; filename=\"%s\"" % (key, fileName))
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
                     'image/png')
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentLengthHeader,
                     self._stream.size())
            imagePart.setBodyDevice(self._stream);
            self._multiPart.append(imagePart)
            request = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
            request.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
  'multipart/form-data; boundary=%s' % self._multiPart.boundary())
            self._reply = self.parent().post(request, self._multiPart)
            self._reply.uploadProgress.connect(self.handleUploadProgress)
            self._reply.error.connect(self.handleError)
            self._reply.finished.connect(self.handleFinished)

    def handleUploadProgress(self, sent, total):
        self.uploadProgress.emit(self._key, sent, total)
        if sent >= total:
            # prevent duplicated uploads
            self._reply.close()

    def handleFinished(self):
        #print(self._reply.readAll()) #uncomment it if you want see output
        self._multiPart.deleteLater()
        self._stream.deleteLater() #self._strem.close()
        self._reply.deleteLater()
        self._reply = None
        self.uploadFinished.emit(self._key)

    def handleError(self):
        print(self._reply.error())
        print(self._reply.errorString())

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window('http://localhost/01/upload/123.php')
    window.setGeometry(500, 300, 500, 300)
    window.show()
    sys.exit(app.exec_())

这是我的HTML表单：

 <form enctype="multipart/form-data" method="post" action="123.php">
   <input type="file" size="32" name="image_field" value="">
   <input type="submit" name="Submit" value="upload">
 </form>