Downloading Image File

[SimonJudge]

I am trying to download a jpg file...

@nam = new QNetworkAccessManager(this);
QObject::connect(nam, SIGNAL(finished(QNetworkReply*)), this, SLOT(httpCompleted(QNetworkReply*)));

QUrl url("http://mysite.com/test.jpg");
nam->get(QNetworkRequest(url));@

In httpCompleted...

@if (reply->error() == QNetworkReply::NoError)
{
QByteArray bytes = reply->readAll();
int count = bytes.count();

... save to file

}@

This mechanism works for non-image files but fails for images.
bytes.count() is zero even though reply->bytesAvailable() is the size of the image file.

Anyone seen this before?

Thanks

Simon

[Guest]

you will see from docs that readAll() has no mechanism to return error on failure and returns an empty bytearray. maybe you need to use some other call ...

[SimonJudge]

Using read() instead returns minus 1. reply->errorString(); is "Unknown error".

Simon

[deimos]

It's possible that no error is returned if a redirection occurred. Try to check content of bytes (qDebug() << bytes) or try to look for a redirection:

@QString forwardedUrl;
forwardedUrl= reply->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl().toString();@