[SOLVED] HTTP POST failed
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Hi,
sorry for the late reply, I was quite busy
the data is coming from the call:
QString(QString::number(rowIndex, 16) + '=' + QString::number(state)).toUtf8();
so as you can see, there is a string and query its UTF8 representation.the request is created as:
QNetworkRequest req(url);
where the url:
const QUrl url("http://192.168.1.10:80/host/0x00");I see on the server side that the header of the request is arrived:
GET /host?0x03=0 HTTP/1.1
Connection: Keep-Alive
Accept-Encoding: gzip, deflate
Accept-Language: hu-HU,en,*
User-Agent: Mozilla/5.0
Host: 192.168.1.10:80but, as you can see, there is no content.
can anybody help me?
Regards,
NorbertUpdate:
I create a real minimal program, which one the issue is reproducible:
QNetworkAccessManager manager;
const QUrl url("http://192.168.1.10:80/host/0x00");
QNetworkRequest req(url);
req.setHeader(QNetworkRequest::ContentTypeHeader, "application/octet-stream");
manager.post(req, QString("1=1").toUtf8());On the server side, the output:
POST /host/0x00 HTTP/1.1
Content-Type: application/octet-stream
Content-Length: 3
Connection: Keep-Alive
Accept-Encoding: gzip, deflate
Accept-Language: hu-HU,en,*
User-Agent: Mozilla/5.0
Host: 192.168.1.10:80Please note, that the double new line is there at the end of the frame.
Can anybody help me?
Regards,
Norbert -
Hi,
What does your server expect exactly ?
Did you compare the content of the request made by your third party software and the one you make with Qt ?
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Hi,
so, what the Qt sends:
POST /host/0x00 HTTP/1.1
Content-Type: application/octet-stream
Content-Length: 3
Connection: Keep-Alive
Accept-Encoding: gzip, deflate
Accept-Language: hu-HU,en,*
User-Agent: Mozilla/5.0
Host: 192.168.1.10:80Please consider that the content length is filled out correctly, but there is no content.
What the server expect:
POST /host/0x00 HTTP/1.1
Content-Type: application/octet-stream
Content-Length: 3
Connection: Keep-Alive
Accept-Encoding: gzip, deflate
Accept-Language: hu-HU,en,*
User-Agent: Mozilla/5.0
Host: 192.168.1.10:801=1
Please consider the data record at the end of the request.
Regards,
Norbert -
Can you share the real code you use ? The last one looked like using only local variable which might get destroyed before everything is done.
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Hi,
I wrote a really minimal test code, where I can verify it (sorry, on this new portal, I don't know, how can I highlight the code):
QByteArray data(QString("1=1").toUtf8());
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);QNetworkAccessManager manager; const QUrl url("http://192.168.1.10:80/host/0x00"); QNetworkRequest req(url); req.setHeader(QNetworkRequest::ContentTypeHeader, "application/octet-stream"); manager.post(req, data); return a.exec();}
AS you can see, I'm using globally declared data and the application won't return until I don't close it (due to a.exec() call) so it has enough time to send everything.
The result, what the server is getting:
POST /host/0x00 HTTP/1.1
Content-Type: application/octet-stream
Content-Length: 3
Connection: Keep-Alive
Accept-Encoding: gzip, deflate
Accept-Language: hu-HU,en,*
User-Agent: Mozilla/5.0
Host: 192.168.1.10:80Please, consider that there is a newline at the end of the "Host" header, and the content length is filled out correctly.
Regards,
Norbert -
One thing I can see, you don't check whether the request is successful or not. I'd check that first.
On a side note, you don't need to pass by QSring to create your QByteArray:
QByteArray payload("1=1");is better in your case. -
Hi,
thanks for the guiding, I found my mistake: it seems, that Qt delivers post requests in multiple packages, which isn't already handled by my device (the server).
Maybe, do you know, how can I force Qt to send the request in one package? Is there a possibility to force it?
Regards,
Norbert -
No I don't, TCP transmissions by definition can be split in several packets. What server are you using that doesn't handle that kind of communication ?
