Reqest and Response in XML

[srohit24]

Hi

I am working on a project that uses Basic authentication scheme to authenticate a user.

I need to call a api in a website.I need to send the username and password in base64 format.

After the header has the host and authentication details, I need to send the request in this format.

=== Request ===

<request client_id="1" client_serial_number="abcded" version="0.1">
<call name="test.reverse">abc</call>
</request>

This is the responce that i should get if all goes well

=== Response ===

<response version="0.1">
<value>cba</value>
</response>

For the header request part, i am using the following code

QXmlStreamReader xml;
QHttp http;
 
void senddata::fetch()
 {
 
     QString username = "abc";
     QString password = "12345";
 
     xml.clear();
 
     QUrl url(lineEdit->text());
 
     http.setHost(url.host());
     http.setUser(username,password);
     connectionId = http.get(url.path());
 }

QXmlStreamReader xml;
QHttp http;

void senddata::fetch()
 {

     QString username = "abc";
     QString password = "12345";

     xml.clear();

     QUrl url(lineEdit->text());

     http.setHost(url.host());
     http.setUser(username,password);
     connectionId = http.get(url.path());
 }

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I am reading the data here

void senddata::readData(const QHttpResponseHeader &resp)
{
     if (resp.statusCode() != 200)
         http.abort();
     else {
         xml.addData(http.readAll());
         parseXml();// This funtion has nothing in it as of now
     }
 }

void senddata::readData(const QHttpResponseHeader &resp)
{
     if (resp.statusCode() != 200)
         http.abort();
     else {
         xml.addData(http.readAll());
         parseXml();// This funtion has nothing in it as of now
     }
 }

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Is my code correct? How should i proceed?

How can i parse the response xml and get the data i need?

[srohit24]

can somebody help me with this??

[wysota]

For such simple things I would use QDomDocument instead of the stream reader.

[srohit24]

thanks for replying mate.

I think what u suggested is what i need for proper functioning

abt headers and data, how can I send the data along with the header? I am stuck here.

Can QDomDocument also manage the response as well as the QHttpResponseHeader?

[wysota]

QDomDocument is for parsing xml data, it has nothing to do with HTTP.

[srohit24]

thanks mate.

can somebody guide me as how i can send the data along with my header??

[wysota]

Did you notice QHttp::post() and QHttp::request()?

[srohit24]

ok.

int QHttp::request ( const QHttpRequestHeader & header, QIODevice * data = 0, QIODevice * to = 0 )

can you explain the function in a better way, than the explanation that is present in Qt Documentation?

what should i assign in the QHttpRequestHeader and in QIODevice?

this is the request header

QByteArray string ("username");
     string.append(":");
     string.append("12345");
     QString converted = string.toBase64();
     //qDebug() <<"String"<< string<<"converted" <<converted ;
 
      QUrl url(lineEdit->text());
 
     http.setHost(url.host());
 
     connectionId = http.get(url.path());

QByteArray string ("username");
     string.append(":");
     string.append("12345");
     QString converted = string.toBase64();
     //qDebug() <<"String"<< string<<"converted" <<converted ;

      QUrl url(lineEdit->text());

     http.setHost(url.host());
     
     connectionId = http.get(url.path());

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this is the data that has to be sent along with the header.

void MainWindow::sendrequest()
 {
    QDomDocument doc("request");
    QDomElement root = doc.createElement("request");
    doc.appendChild(root);
 
    QDomElement tag = doc.createElement("call");
    root.appendChild(tag);
 
    QDomText t = doc.createTextNode("abc");
    tag.appendChild(t);
 
    QString xml = doc.toString();
 }

void MainWindow::sendrequest()
 {
    QDomDocument doc("request");
    QDomElement root = doc.createElement("request");
    doc.appendChild(root);

    QDomElement tag = doc.createElement("call");
    root.appendChild(tag);

    QDomText t = doc.createTextNode("abc");
    tag.appendChild(t);

    QString xml = doc.toString();
 }

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can u help me as how I should call the request function??

Will using QNetworkAccessManager for the request and response from a webpage, be easier?

thanks

[wysota]

"data" is a pointer to a QIODevice (such as QBuffer) containing the data the engine should send to the server as the request (i.e. the result of your sendrequest() method). As for the header - the least you have to provide is the method (GET or POST) and relative path of the URL that should be queried.

[srohit24]

thanks mate.

so i need to call the request, like this?
http.request( GET, xmlrequest);

I need to have the xml request like this

<request client_id="1" client_serial_number="abcded" version="0.1">
<call name="test.reverse">abc</call>
</request>

but after using this code,

QDomDocument doc("request");
    QDomElement root = doc.createElement("request");
    doc.appendChild(root);
 
    QDomElement tag = doc.createElement("call");
    QString name = "teci.test.reverse";
    QString value = "abc";
    tag.setAttribute(name,value);
     root.appendChild(tag);
 
    QString xmlrequest = doc.toString();

QDomDocument doc("request");
    QDomElement root = doc.createElement("request");
    doc.appendChild(root);

    QDomElement tag = doc.createElement("call");
    QString name = "teci.test.reverse";
    QString value = "abc";
    tag.setAttribute(name,value);
     root.appendChild(tag);

    QString xmlrequest = doc.toString();

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i am able to only this.

"<!DOCTYPE request>
<request>
<call test.reverse="abc" />
</request>

can you help me with this?

[wysota]

thanks mate.

so i need to call the request, like this?
http.request( GET, xmlrequest);

Not really, you have to match the argument types (and values of course).

I need to have the xml request like this

<request client_id="1" client_serial_number="abcded" version="0.1">
<call name="test.reverse">abc</call>
</request>

but after using this code,

QDomDocument doc("request");
    QDomElement root = doc.createElement("request");
    doc.appendChild(root);
 
    QDomElement tag = doc.createElement("call");
    QString name = "teci.test.reverse";
    QString value = "abc";
    tag.setAttribute(name,value);
     root.appendChild(tag);
 
    QString xmlrequest = doc.toString();

QDomDocument doc("request");
    QDomElement root = doc.createElement("request");
    doc.appendChild(root);

    QDomElement tag = doc.createElement("call");
    QString name = "teci.test.reverse";
    QString value = "abc";
    tag.setAttribute(name,value);
     root.appendChild(tag);

    QString xmlrequest = doc.toString();

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i am able to only this.

"<!DOCTYPE request>
<request>
<call test.reverse="abc" />
</request>

What more would you expect from the above code snippet?

[srohit24]

i want to exact copy of the request xml thats been given.

I am asking, what changes should i make to get the xml that will request the server.