Http Posting using QNetworkAccessManager

[Mohammadhzp]

I tried this but no differences.still not working
I don't know what to do anymore

[ChrisW67]

Yes it is. Your code with only the web server and file path changed, the submit button encoded, and the close() call removed:

from PyQt4 import QtCore, QtGui, QtNetwork
import sys
class Window(QtGui.QWidget):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
 
        self.netaccess = QtNetwork.QNetworkAccessManager(self)
        self._uploaders = {}
        row = 1 #this number will change per upload in real program,this is just demo
        self.address = 'http://dev/demo.php'
        stream = QtCore.QFile('icon.png')
        if stream.open(QtCore.QIODevice.ReadOnly):
            data = stream
 
            uploader = self._uploaders[row] = Uploader(row, self.netaccess)
 
            uploader.upload(data, self.address)
 
class Uploader(QtCore.QObject):
 
    def __init__(self, key, parent):
        QtCore.QObject.__init__(self, parent)
        self._key = key
        self._reply = None
 
 
    def upload(self, data, url):
        if self._reply is None:
 
            self._stream = data
 
            self._multiPart = QtNetwork.QHttpMultiPart(QtNetwork.QHttpMultiPart.FormDataType)
 
            fileName = QtCore.QFileInfo(self._stream.fileName()).fileName()
            key = 'file'
 
            imagePart = QtNetwork.QHttpPart()
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentDispositionHeader,
                     "form-data; name=\"%s\"; filename=\"%s\"" % (key, fileName))
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
                     'image/png')
            imagePart.setBodyDevice(self._stream)
 
            submitPart = QtNetwork.QHttpPart()
            submitPart.setHeader(QtNetwork.QNetworkRequest.ContentDispositionHeader,
            "form-data; name=\"submit\"")
            submitPart.setBody("submit")
 
            self._multiPart.append(imagePart)
            self._multiPart.append(submitPart)
 
            request = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
            request.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
  'multipart/form-data; boundary=%s' % self._multiPart.boundary())
            request.setRawHeader('User-Agent','Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36')
 
            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):
        print sent, total
 
    def handleFinished(self):
        print('Content: ',self._reply.readAll())#no output here :(
        self._stream.close()
        self._multiPart.deleteLater()
        self._reply.deleteLater()
        self._reply = None
        app.quit()
 
    def handleError(self):
        print('Error String :',self._reply.errorString())
        print('Error number: ',self._reply.error())
 
 
app = QtGui.QApplication(sys.argv)
demo = Window()
sys.exit(app.exec_())

from PyQt4 import QtCore, QtGui, QtNetwork
import sys
class Window(QtGui.QWidget):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
        
        self.netaccess = QtNetwork.QNetworkAccessManager(self)
        self._uploaders = {}
        row = 1 #this number will change per upload in real program,this is just demo
        self.address = 'http://dev/demo.php'
        stream = QtCore.QFile('icon.png')
        if stream.open(QtCore.QIODevice.ReadOnly):
            data = stream
        
            uploader = self._uploaders[row] = Uploader(row, self.netaccess)
        
            uploader.upload(data, self.address)

class Uploader(QtCore.QObject):

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


    def upload(self, data, url):
        if self._reply is None:

            self._stream = data

            self._multiPart = QtNetwork.QHttpMultiPart(QtNetwork.QHttpMultiPart.FormDataType)

            fileName = QtCore.QFileInfo(self._stream.fileName()).fileName()
            key = 'file'

            imagePart = QtNetwork.QHttpPart()
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentDispositionHeader,
                     "form-data; name=\"%s\"; filename=\"%s\"" % (key, fileName))
            imagePart.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
                     'image/png')
            imagePart.setBodyDevice(self._stream)

            submitPart = QtNetwork.QHttpPart()
            submitPart.setHeader(QtNetwork.QNetworkRequest.ContentDispositionHeader,
            "form-data; name=\"submit\"")
            submitPart.setBody("submit")

            self._multiPart.append(imagePart)
            self._multiPart.append(submitPart)

            request = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
            request.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader,
  'multipart/form-data; boundary=%s' % self._multiPart.boundary())
            request.setRawHeader('User-Agent','Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36')

            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):
        print sent, total

    def handleFinished(self):
        print('Content: ',self._reply.readAll())#no output here :(
        self._stream.close()
        self._multiPart.deleteLater()
        self._reply.deleteLater()
        self._reply = None
        app.quit()

    def handleError(self):
        print('Error String :',self._reply.errorString())
        print('Error number: ',self._reply.error())


app = QtGui.QApplication(sys.argv)
demo = Window()
sys.exit(app.exec_())

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Using this simple PHP file upload receiver:

$ cat demo.php
<html>
    <body>
        <form method="post" enctype="multipart/form-data">
            <label for="file">Filename:</label>
            <input type="file" name="file" id="file" />
            <br />
            <input type="submit" name="submit" value="Submit" />
        </form>
        <p>
            <?php
            if(isset($_POST['submit'])) {
                if ($_FILES["file"]["error"] > 0) {
                    echo "Error: " . $_FILES["file"]["error"] . "<br />";
                } else {
                    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
                    echo "Type: " . $_FILES["file"]["type"] . "<br />";
                    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
                    echo "Stored in: " . $_FILES["file"]["tmp_name"];
                }
            }
            ?>
        </p>
    </body>
</html>

$ cat demo.php
<html>
    <body>
        <form method="post" enctype="multipart/form-data">
            <label for="file">Filename:</label>
            <input type="file" name="file" id="file" />
            <br />
            <input type="submit" name="submit" value="Submit" />
        </form>
        <p>
            <?php
            if(isset($_POST['submit'])) {
                if ($_FILES["file"]["error"] > 0) {
                    echo "Error: " . $_FILES["file"]["error"] . "<br />";
                } else {
                    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
                    echo "Type: " . $_FILES["file"]["type"] . "<br />";
                    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
                    echo "Stored in: " . $_FILES["file"]["tmp_name"];
                }
            }
            ?>
        </p>
    </body>
</html>

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Gives this output with an artificially large icon.png:

16384 530779
32768 530779
...
524288 530779
530779 530779
('Content: ', PyQt4.QtCore.QByteArray('<html>\n    <body>\n        <form method="post" enctype="multipart/form-data">\n            <label for="file">Filename:</label>\n            <input type="file" name="file" id="file" /> \n            <br />\n            <input type="submit" name="submit" value="Submit" />\n        </form>\n        <p>\n            Upload: icon.png<br />Type: image/png<br />Size: 517.9921875 Kb<br />Stored in: /tmp/phpKg8FG7        </p>\n    </body>\n</html>\n'))

16384 530779
32768 530779
...
524288 530779
530779 530779
('Content: ', PyQt4.QtCore.QByteArray('<html>\n    <body>\n        <form method="post" enctype="multipart/form-data">\n            <label for="file">Filename:</label>\n            <input type="file" name="file" id="file" /> \n            <br />\n            <input type="submit" name="submit" value="Submit" />\n        </form>\n        <p>\n            Upload: icon.png<br />Type: image/png<br />Size: 517.9921875 Kb<br />Stored in: /tmp/phpKg8FG7        </p>\n    </body>\n</html>\n'))

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[Mohammadhzp]

Oh my God
I can't believe finally solution is here
I don't know how to say thank you,you helped me a lot,thanks Chris
it's working like a charm
but I also found the real issue in here
I tried your code in python3 for the first time and like always I didn't get any answer(no file uploaded) I become so upset since your code didn't working too !
anyway,I just thought maybe it's because PyQt4 have problem in python3,So I installed PyQt4 on python2 and Got exactly your result and file is uploading too
so it's obviously a PyQt4 bug in python3(the exact code is working on python2 but not in python3)
Do I need to report this ? how ?

[ChrisW67]

I am running Python 2.7.5 and Python 3.2.5 with PyQt 4.10.2 on 64-bit Linux.

My Python 3.2 on Linux also fails to send the data. The multipart message never makes it onto the wire correctly. Look closely at the two requests in Wireshark. With Python 2.7 the request goes on the wire with this header:

MIME Multipart Media Encapsulation, Type: multipart/form-data, Boundary: "boundary_.oOo._Nzc0MjMxOTU4MTgyMzc5MTk0Mw==NzIxMTQzNjA4"

MIME Multipart Media Encapsulation, Type: multipart/form-data, Boundary: "boundary_.oOo._Nzc0MjMxOTU4MTgyMzc5MTk0Mw==NzIxMTQzNjA4"

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but with Python 3 the Boundary value gets mangled:

MIME Multipart Media Encapsulation, Type: multipart/form-data, Boundary: "b'boundary_.oOo._NjY2OTgyMTQ3MTg1NTk1MzgyNw==NDY5Njg1NTMw'"

MIME Multipart Media Encapsulation, Type: multipart/form-data, Boundary: "b'boundary_.oOo._NjY2OTgyMTQ3MTg1NTk1MzgyNw==NDY5Njg1NTMw'"

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resulting in a malformed payload (because the payload is encoded with boundary = "boundary_.oOo._NjY2OTgyMTQ3MTg1NTk1MzgyNw==NDY5Nj g1NTMw"). The PyQt4 under Python 3 is outputting the boundary as a bytes literal not a string. This could be a python wrapper type mapping issue.

You should address the issue to the PyQt mailing list or Riverbank Software directly if you have a commercial licence.

[Mohammadhzp]

I reported bug
Thanks for help Chris