PySide QWebView and downloading unsupported conten

Below is the code for a minimal browser using PySide for demoing webapps and the like. It generally functions as I'd like though I can't quite seem to get my head around how to successfully download unsupportedContent.

In the Finished method self.reply.readAll() returns an empty QByteArray.

Any help would be greatly appreciated. Thanks

import sys
import os
from PySide import QtCore, QtGui, QtWebKit, QtNetwork


class Browser(QtGui.QMainWindow):

    def __init__(self):
        QtGui.QMainWindow.__init__(self)

        self.web = QtWebKit.QWebView()
        self.web.page().setForwardUnsupportedContent(True)
        self.web.page().unsupportedContent.connect(self.download)

        self.manager = QtNetwork.QNetworkAccessManager()
        self.manager.finished.connect(self.finished)

    def download(self, reply):
        self.request = QtNetwork.QNetworkRequest(reply.url())
        self.reply = self.manager.get(self.request)

    def finished(self):
        path = os.path.expanduser(os.path.join('~', unicode(self.reply.url().path()).split('/')[-1]))
        destination = QtGui.QFileDialog.getSaveFileName(self, "Save", path)
        if destination:
            filename = destination[0]
            with open(filename, 'wb') as f:
                f.write(str(self.reply.readAll()))
                f.close()


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)

    browser = Browser()
    browser.web.load(QtCore.QUrl('http://127.0.0.1:8000'))
    browser.web.show()

    sys.exit(app.exec_())

With a fair bit of help a solution was found. For those who might be interested, the final versions of the download and finished function are as follows:

def download(self, reply):
    self.request = reply.request()
    self.request.setUrl(reply.url())
    self.reply = self.manager.get(self.request)

def finished(self):
    path = os.path.expanduser(
        os.path.join('~',
                     unicode(self.reply.url().path()).split('/')[-1]))
    if self.reply.hasRawHeader('Content-Disposition'):
        cnt_dis = self.reply.rawHeader('Content-Disposition').data()
        if cnt_dis.startswith('attachment'):
            path = cnt_dis.split('=')[1]

    destination = QtGui.QFileDialog.getSaveFileName(self, "Save", path)
    if destination:
        f = open(destination[0], 'wb')
        f.write(self.reply.readAll())
        f.flush()
        f.close()