QNetworkManager and post requests

mm7490

Hi Guys,

i'm trying to send a post request, via QNetworkManager. This post request should trigger a c2dm push notification to an android phone.

@
QUrl header("https://android.clients.google.com/c2dm/send");
header.addQueryItem("Authorization: GoogleLogin auth",m_authCode);
QNetworkRequest *req(header);
req->setHeader(QNetworkRequest::ContentLengthHeader,header.encodedQuery().length());

QUrl url;
url.addQueryItem("registration_id",m_pRegCode->text());
url.addQueryItem("data.payload","data");
url.addQueryItem("collapse_key","0");
qDebug("%s",qPrintable(url.toString()));
qDebug("%s",qPrintable(QString(url.encodedQuery())));
QByteArray data;
data = url.encodedQuery();
m_pPushRep = m_pManager->post(req,data);
@

I don't get a finished Signal from the Manager. What am i doing wrong? Has anyone experience with the c2dm service of google?

lgeyer

Have you verified that ... ?

you are correctly connecting to the finished signal (connect() returns true)
you are correctly handling SSL validation errors (by connecting to the sslErrors signal)
your request is correctly sent and a response is received (using eg. Wireshark)

mm7490

Hi Lukas,

Yes i am correctly connected to the finished signal (connect returns true, there is no qDebug message in the shell, and last but not least, before im handling the upper code i am requesting something else via the same Networkaccessmanager.Also i don't think i get ssl errors, cause, as i said im connecting previously also via https, but i didn't connect to the sslError Signal, thats correct.

My error image has also moved. I think the problem was the wrong header. Im executing the code like this now:

@
QString headerStr = QString("Authorization: GoogleLogin auth=") + m_authCode;

QUrl url;
url.addQueryItem("registration_id",m_pRegCode->text());
url.addQueryItem("collapse_key","0");
url.addQueryItem("data.payload","data");
qDebug("%s",qPrintable(url.toString()));
qDebug("%s",qPrintable(QString(url.encodedQuery())));
QByteArray data;
data = url.encodedQuery();

QUrl header("https://android.apis.google.com/c2dm/send");
QNetworkRequest req(header);
req.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded;charset=UTF-8");
req.setHeader(QNetworkRequest::ContentLengthHeader,data.length());
req.setRawHeader(QByteArray("Authorization"),headerStr.toAscii());

qDebug("%s",qPrintable(req.url().toString()));
m_pPushRep = m_pManager->post(req,data);
@

With this, i do get an answer from the google servers, but the answer is
@
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>302 Moved</TITLE></HEAD><BODY>
<H1>302 Moved</H1>
The document has moved
<A HREF="http://www.google.com">here</A>.
</BODY></HTML>
@

This actually confuses me a little bit. Can anyone provide some help with it?

goetz

You get a 302 redirect. QNAM does not follow redirections by default, so it's up to you to grab the returned URL and re-send your request. Get the target URL from the returned [[Doc:QNetworkReply]] at attribute QNetworkRequest::RedirectionTargetAttribute.

mm7490

Yeah, but redirecting to www.google.com doesn't make any sense, so i see no point in following it.

Am i doing something wrong in my code, posted up there?

goetz

You should ask google why they are sending this redirect.

If you are able to use Qt 4.8, I would recommend looking into [[Doc:QHttpMultiPart]] which eases posting HTML/HTTP forms significantly.

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QNetworkManager and post requests