Qt-interest Archive, June 2007
problem with QHttp::request
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Message 1 in thread
Hi! I'm having the following problem using QHttp::request:
My debug message:
Started processing: 4
Could not read enough bytes from the device
Operation: 4 finished with success
The first message, refers to a requestStarted( int ), the second one, I
believe comes from the QBuffer, which is where lies the problem. The
last message comes from requestFinished( int, bool ).
The snip of the code is:
http->request(header, webpage, to);
webpage is initialized on the constructor of this class with:
webpage = new QBuffer(this);
webpage->open(QBuffer::ReadWrite);
and to with:
to = new QBuffer(this);
to->open(QBuffer::ReadWrite);
to->write("1");
What am I doing wrong? Why is the buffer closing before receiving all
the data?
Thanks
--
[ signature omitted ]
Message 2 in thread
*bump*
André Lemos wrote:
> Hi! I'm having the following problem using QHttp::request:
>
>
> My debug message:
>
>
> Started processing: 4
> Could not read enough bytes from the device
> Operation: 4 finished with success
>
>
> The first message, refers to a requestStarted( int ), the second one,
> I believe comes from the QBuffer, which is where lies the problem. The
> last message comes from requestFinished( int, bool ).
>
>
>
> The snip of the code is:
>
> http->request(header, webpage, to);
>
> webpage is initialized on the constructor of this class with:
>
> webpage = new QBuffer(this);
> webpage->open(QBuffer::ReadWrite);
>
> and to with:
>
> to = new QBuffer(this);
> to->open(QBuffer::ReadWrite);
> to->write("1");
>
>
>
> What am I doing wrong? Why is the buffer closing before receiving all
> the data?
>
>
>
> Thanks
--
[ signature omitted ]
Message 3 in thread
Hi,
>> The snip of the code is:
>> [...]
>> What am I doing wrong? Why is the buffer closing before receiving all
>> the data?
Could you maybe provide a minimal but complete program that reproduces the
problem?
--
[ signature omitted ]
Message 4 in thread
Dimitri wrote:
> Hi,
>
>>> The snip of the code is:
>>> [...]
>>> What am I doing wrong? Why is the buffer closing before receiving
>>> all the data?
>
> Could you maybe provide a minimal but complete program that reproduces
> the problem?
Oddly enough, as I was stripping away my current program to provide with
a minimal example, I've come across another error, where http->error()
yields 1.
So... When myRequestFinished() is called, I'm getting 1 (which is
Unknown Error). And yes... I can open google.
#include <QtNetwork/QHttp>
#include <QtCore/QIODevice>
#include <QtCore/QBuffer>
#include <iostream>
#include "http.h"
using namespace std;
Http::Http( )
{
http = new QHttp(this);
webpage = new QBuffer(this);
to = new QBuffer(this);
webpage->open(QIODevice::ReadWrite);
to->open(QIODevice::WriteOnly);
connect(http, SIGNAL(requestFinished( int, bool )), this,
SLOT(myRequestFinished(int, bool)));
hitMe();
}
void Http::hitMe()
{
http->get("www.google.com", webpage);
}
void Http::myRequestFinished(int id, bool result)
{
if (result) {
cout << "OH NOESSSSSSSSSSSSSSSSSSSSSSSS" <<
http->error() << endl;
}
}
--
[ signature omitted ]
Message 5 in thread
Hi,
> Oddly enough, as I was stripping away my current program to provide with
> a minimal example, I've come across another error, where http->error()
> yields 1.
I cannot reproduce that. See below.
> So... When myRequestFinished() is called, I'm getting 1 (which is
> Unknown Error). And yes... I can open google.
This is not a complete example since it lacks a http.h and main(). Anyway, I
had a look at the code and noticed:
> [...]
> http->get("www.google.com", webpage);
> [...]
The documentation of QHttp::get() reads:
Sends a get request for path to the server set by setHost()
or as specified in the constructor.
path must be an absolute path like /index.html or an absolute
URI like http://www.trolltech.com/index.html.
Change your code to:
http->setHost("www.google.com");
http->get("http://www.google.com/";, webpage);
--
[ signature omitted ]
Message 6 in thread
Dimitri wrote:
> Hi,
>
>> Oddly enough, as I was stripping away my current program to provide
>> with a minimal example, I've come across another error, where
>> http->error() yields 1.
>
> I cannot reproduce that. See below.
>
>> So... When myRequestFinished() is called, I'm getting 1 (which is
>> Unknown Error). And yes... I can open google.
>
> This is not a complete example since it lacks a http.h and main().
> Anyway, I had a look at the code and noticed:
>
>> [...]
>> http->get("www.google.com", webpage);
>> [...]
>
> The documentation of QHttp::get() reads:
> Sends a get request for path to the server set by setHost()
> or as specified in the constructor.
> path must be an absolute path like /index.html or an absolute
> URI like http://www.trolltech.com/index.html.
>
> Change your code to:
> http->setHost("www.google.com");
> http->get("http://www.google.com/";, webpage);
That did fix the problem. But the real problem I am having is with
QHttp::request().
void Http::hitMe()
{
http->setHost("www.google.com");
header.setValue("Host", "http://www.google.com:80";);
header.setValue("Host", host+":80");
http->request(header, webpage);
}
This gives me: "Could not read enough bytes from the device".
I want to request a crafted header and store the result on "webpage",
that is a QBuffer.
Isn't this the right way of doing things?
Thanks
--
[ signature omitted ]
Message 7 in thread
André Lemos wrote:
> Dimitri wrote:
>> Hi,
>>
>>> Oddly enough, as I was stripping away my current program to provide
>>> with a minimal example, I've come across another error, where
>>> http->error() yields 1.
>>
>> I cannot reproduce that. See below.
>>
>>> So... When myRequestFinished() is called, I'm getting 1 (which is
>>> Unknown Error). And yes... I can open google.
>>
>> This is not a complete example since it lacks a http.h and main().
>> Anyway, I had a look at the code and noticed:
>>
>>> [...]
>>> http->get("www.google.com", webpage);
>>> [...]
>>
>> The documentation of QHttp::get() reads:
>> Sends a get request for path to the server set by setHost()
>> or as specified in the constructor.
>> path must be an absolute path like /index.html or an absolute
>> URI like http://www.trolltech.com/index.html.
>>
>> Change your code to:
>> http->setHost("www.google.com");
>> http->get("http://www.google.com/";, webpage);
>
>
> That did fix the problem. But the real problem I am having is with
> QHttp::request().
>
>
> void Http::hitMe()
> {
>
> http->setHost("www.google.com");
>
> header.setValue("Host", "http://www.google.com:80";);
typo in here. Only this line.
>
> http->request(header, webpage);
>
>
> }
>
>
>
> This gives me: "Could not read enough bytes from the device".
>
> I want to request a crafted header and store the result on "webpage",
> that is a QBuffer.
>
> Isn't this the right way of doing things?
>
>
>
> Thanks
--
[ signature omitted ]
Message 8 in thread
André Lemos wrote:
> Dimitri wrote:
>> Hi,
>>
>>> Oddly enough, as I was stripping away my current program to provide
>>> with a minimal example, I've come across another error, where
>>> http->error() yields 1.
>>
>> I cannot reproduce that. See below.
>>
>>> So... When myRequestFinished() is called, I'm getting 1 (which is
>>> Unknown Error). And yes... I can open google.
>>
>> This is not a complete example since it lacks a http.h and main().
>> Anyway, I had a look at the code and noticed:
>>
>>> [...]
>>> http->get("www.google.com", webpage);
>>> [...]
>>
>> The documentation of QHttp::get() reads:
>> Sends a get request for path to the server set by setHost()
>> or as specified in the constructor.
>> path must be an absolute path like /index.html or an absolute
>> URI like http://www.trolltech.com/index.html.
>>
>> Change your code to:
>> http->setHost("www.google.com");
>> http->get("http://www.google.com/";, webpage);
>
>
> That did fix the problem. But the real problem I am having is with
> QHttp::request().
>
>
> void Http::hitMe()
> {
>
> http->setHost("www.google.com");
>
> header.setValue("Host", "http://www.google.com:80";);
typo in here. Only this line.
>
> http->request(header, webpage);
>
>
> }
>
>
>
> This gives me: "Could not read enough bytes from the device".
>
> I want to request a crafted header and store the result on "webpage",
> that is a QBuffer.
>
> Isn't this the right way of doing things?
>
>
>
> Thanks
--
[ signature omitted ]
Message 9 in thread
Hi,
> [...]
> That did fix the problem. But the real problem I am having is with
> QHttp::request().
> [...]
Maybe "header" is not properly initialized, or something like that.
Could you provide a compilable, minimal, but complete example? Try modifying
the attached example which works fine for me.
--
[ signature omitted ]
class QHttp;
class QBuffer;
#include <QObject>
class Http : public QObject {
Q_OBJECT
public:
Http();
public slots:
void done(int id, bool result);
private:
QHttp *http;
QBuffer *buffer;
};
#include <QHttp>
#include <QBuffer>
#include <QtDebug>
Http::Http() {
http = new QHttp(this);
buffer = new QBuffer(this);
buffer->open(QIODevice::ReadWrite);
connect(http, SIGNAL(requestFinished(int, bool)), this, SLOT(done(int, bool)));
http->setHost("www.google.com");
http->get("http://www.google.com/";, buffer);
}
void Http::done(int id, bool result) {
if (result)
qDebug() << "Error! " << http->errorString();
else
qDebug() << "Success:" << http->errorString();
}
#include <QApplication>
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
Http http;
return app.exec();
}
Message 10 in thread
Dimitri wrote:
> Hi,
>
>> [...]
>> That did fix the problem. But the real problem I am having is with
>> QHttp::request().
>> [...]
>
> Maybe "header" is not properly initialized, or something like that.
>
> Could you provide a compilable, minimal, but complete example? Try
> modifying the attached example which works fine for me.
>
> --
> Dimitri
>
it would be something like the attached files, that give me:
Success: "Unknown error"
Could not read enough bytes from the device
Success: "Unknown error"
//class QHttp;
//class QHttp;
class QBuffer;
#include <QObject>
#include <QtNetwork/QHttpRequestHeader>
#include <http.h>
/*
class Http : public QObject {
Q_OBJECT
public:
Http();
public slots:
void done(int id, bool result);
private:
QHttp *http;
QBuffer *buffer;
};
*/
#include <QtNetwork/QHttp>
#include <QBuffer>
#include <QtDebug>
Http::Http() {
http = new QHttp(this);
buffer = new QBuffer(this);
buffer->open(QIODevice::ReadWrite);
connect(http, SIGNAL(requestFinished(int, bool)), this, SLOT(done(int, bool)));
http->setHost("www.google.com");
QHttpRequestHeader header("GET", "/");
header.setValue("Host", "www.google.com:80");
http->request(header, buffer);
}
void Http::done(int id, bool result) {
if (result)
qDebug() << "Error! " << http->errorString();
else
qDebug() << "Success:" << http->errorString();
}
#include <QApplication>
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
Http http;
return app.exec();
}
class QHttp;
class QHttp;
class QBuffer;
#include <QObject>
class Http : public QObject {
Q_OBJECT
public:
Http();
public slots:
void done(int id, bool result);
private:
QHttp *http;
QBuffer *buffer;
};
Message 11 in thread
Hi,
> http->request(header, buffer);
Try changing the above to:
http->request(header);
seems to be fixing the problem.
--
[ signature omitted ]
Message 12 in thread
Dimitri wrote:
> Hi,
>
>> http->request(header, buffer);
>
> Try changing the above to:
> http->request(header);
> seems to be fixing the problem.
>
Well yeah....
But then where would the reply from that request be stored? That's my
problem.
--
[ signature omitted ]
Message 13 in thread
Hi,
> Well yeah....
>
> But then where would the reply from that request be stored? That's my
> problem.
The documentation for QHttp::request()
http://doc.trolltech.com/4.3/qhttp.html#request
reads:
int QHttp::request ( const QHttpRequestHeader & header,
QIODevice * data = 0,
QIODevice * to = 0 )
Sends a request to the server set by setHost() or as specified
in the constructor. Uses the "header" as the HTTP request header.
You are responsible for setting up a header that is appropriate
for your request.
The incoming data comes via the "data" IO device.
[...]
The first argument to Qhttp::request() does not look like it stores the reply
of the request.
--
[ signature omitted ]
Message 14 in thread
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Dimitri wrote:
<blockquote cite="mid:f4uf8b$lcc$1@xxxxxxxxxxxxxxxxxx"; type="cite">Hi,
<br>
<br>
<blockquote type="cite">Well yeah....
<br>
<br>
But then where would the reply from that request be stored? That's my
problem.
<br>
</blockquote>
<br>
The documentation for QHttp::request()
<br>
<a class="moz-txt-link-freetext" href="http://doc.trolltech.com/4.3/qhttp.html#request";>http://doc.trolltech.com/4.3/qhttp.html#request</a>
<br>
reads:
<br>
int QHttp::request ( const QHttpRequestHeader & header,
<br>
QIODevice * data = 0,
<br>
QIODevice * to = 0 )
<br>
Sends a request to the server set by setHost() or as specified
<br>
in the constructor. Uses the "header" as the HTTP request header.
<br>
You are responsible for setting up a header that is appropriate
<br>
for your request.
<br>
The incoming data comes via the "data" IO device.
<br>
[...]
<br>
<br>
The first argument to Qhttp::request() does not look like it stores the
reply of the request.
<br>
</blockquote>
<br>
it sure doesn't! But the second one does.... Which is what I was trying
to do.<br>
<br>
<b>"The incoming data comes via the "data" IO device."<br>
<br>
</b>Anyways, I'm going to try Sam Duttons' sugestion.<br>
<br>
<br>
</body>
</html>
--
[ signature omitted ]
Message 15 in thread
Hi,
>> The first argument to Qhttp::request() does not look like it stores
>> the reply of the request.
>
> it sure doesn't! But the second one does.... Which is what I was trying
> to do.
Sorry, I meant:
The second argument to Qhttp::request() does not look like it stores the reply
of the request. What makes you think it does?
--
[ signature omitted ]
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