<![CDATA[[SOLVED] Using QHttpMultipart for a HTML form]]>Greetings!

I got a problem with QNetworkAccessmanager::post() method in uploading a file programmatically using QHttpMultipart.

I got success using an HTML form via QWebView. The HTML form looks like this:

@<form method="post" action="[url value received in response]" enctype="multipart/form-data">
<!-- MUST FIELDS -->
<input type="hidden" name="MAX_FILE_SIZE" value="[max_file_size value received in response]">
<input type="hidden" name="UPLOAD_IDENTIFIER" value="[upload_identifier value received in response]">
<input type="hidden" name="extra_info" value="[extra_info value received in response]">
<input type="file" name="userfile">
<input type="submit" value="Submit">
</form>@

It doesn't help a lot since I need to select a file (without user interaction) and submit it to a certain url. I followed the guide in the QHttpmultipart documentation but "fails" every-time.

]]>https://forum.qt.io/topic/21034/solved-using-qhttpmultipart-for-a-html-formRSS for NodeMon, 21 Sep 2026 07:11:44 GMTThu, 01 Nov 2012 11:34:39 GMT60<![CDATA[Reply to [SOLVED] Using QHttpMultipart for a HTML form on Thu, 21 Feb 2013 14:29:55 GMT]]>[quote author="dv879" date="1361446791"]Thank you Code_ReaQtor for sharing the link to TuckDesign's solution. It really does the trick! :)[/quote]

Sure. You're welcome.

]]>https://forum.qt.io/post/168071https://forum.qt.io/post/168071Thu, 21 Feb 2013 14:29:55 GMT<![CDATA[Reply to [SOLVED] Using QHttpMultipart for a HTML form on Thu, 21 Feb 2013 11:39:51 GMT]]>Thank you Code_ReaQtor for sharing the link to TuckDesign's solution. It really does the trick! :)

]]>https://forum.qt.io/post/168044https://forum.qt.io/post/168044Thu, 21 Feb 2013 11:39:51 GMT<![CDATA[Reply to [SOLVED] Using QHttpMultipart for a HTML form on Sun, 11 Nov 2012 06:16:49 GMT]]>Seems like my method is too buggy. Sometimes it uploads a file and sometimes it doesn't.... I don't know why.

Well, I found a solution from "TuckDesgin":http://www.tuckdesign.com/sources/Qt and modified it.

... and it worked for me everytime, I just need to test it again and again just to make sure.

]]>https://forum.qt.io/post/156629https://forum.qt.io/post/156629Sun, 11 Nov 2012 06:16:49 GMT<![CDATA[Reply to [SOLVED] Using QHttpMultipart for a HTML form on Sun, 04 Nov 2012 13:13:46 GMT]]>I already solved it. Seems like there is something wrong with the documentation for QHttpMultiPart. The documentation points out RFC 2046 but can't find the answer as I search for it.

I was able to google RFC 1867 which solved the problem.

In the documentation:
@QHttpPart imagePart;
imagePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("image/jpeg"));
imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name="image""));@

I think the problem was that ContentDispositionHeader should come first before ContentTypeHeader.
I tried this using the "file" input control and not with an "image" as cited in the code;

]]>https://forum.qt.io/post/156113https://forum.qt.io/post/156113Sun, 04 Nov 2012 13:13:46 GMT