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The correct HTTP POST format using QNetworkRequest

I am trying to send a JSON request to a web service and keep getting internal server errors in response to the request.

Here is what I am trying to send:

POST /api/1.7/webservice.asmx HTTP/1.1
Host: www.superService.com
User-Agent: My app name v0.1
X-Custom-User-Agent: My app name v0.1
Content-Type: application/json
Content-Length:81

{"method":"AuthenticatePlain","loginName":"username@domain.com","password":"mypass"}

This should be sent to https://www.superService.com/api/1.7/ssapi.asmx

In preparation QNetworkRequest, which method is used to insert the row

POST / api / 1.7 / webservice.asmx HTTP / 1.1 ?

Is the full title contained in the object QNetworkRequest?
Should JSON data be in the object QNetworkRequestor is it added to the message as the second argument to the method QNetworkAccessManager::post()?

Here is my current code in the slot on_btnLogin_clicked():

connect(m_qnam, SIGNAL(finished(QNetworkReply*)),
                 this, SLOT(handleNetworkData(QNetworkReply*)));
    connect(m_qnam,SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)),
                 this, SLOT(handleSSLErrors(QNetworkReply*)));

    QString baseString = "";
    baseString.append(QString("POST /api/1.7/webservice.asmx HTTP/1.1\r\n").toUtf8());  
    baseString.append(QString("www.superService.com\r\n").toUtf8());
    baseString.append(QString("User-Agent: My app name v0.1\r\n").toUtf8());
    baseString.append(QString("X-Custom-User-Agent: My app name v0.1\r\n").toUtf8());
    baseString.append(QString("Content-Type: application/json\r\n").toUtf8());

    QString jsonString = QString("{");
    jsonString.append("\"method\":");
    jsonString.append("\"AuthenticatePlain\"");
    jsonString.append(",\"loginName\":");
    jsonString.append("\"username@domain.com\"");
    jsonString.append(",\"password\":");
    jsonString.append("\"mypass\"");
    jsonString.append("}");

    QByteArray json = jsonString.toUtf8();

    baseString.append(QString("Content-Length:").toUtf8());
    baseString.append(QString::number(json.length()));
    baseString.append("\r\n").toUtf8();
    baseString.append(QString("\r\n").toUtf8());
    baseString.append(json);

    request = QNetworkRequest(QUrl("https://www.superService.com/api/1.7/ssapi.asmx"));
    request.setRawHeader()


    qDebug() << "Base String: "<< baseString;


    m_qnam->post(request,baseString.toUtf8());
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1 answer

HTTP-. :

connect(m_qnam, SIGNAL(finished(QNetworkReply*)), this, SLOT(handleNetworkData(QNetworkReply*)));
connect(m_qnam,SIGNAL(sslErrors(QNetworkReply*,QList<QSslError>)), this, SLOT(handleSSLErrors(QNetworkReply*)));

// Build your JSON string as usual
QByteArray jsonString = "{\"method\":\"AuthenticatePlain\",\"loginName\":\"username@domain.com\",\"password\":\"mypass\"}";

// For your "Content-Length" header
QByteArray postDataSize = QByteArray::number(jsonString.size());

// Time for building your request
QUrl serviceURL("https://www.superService.com/api/1.7/ssapi.asmx");
QNetworkRequest request(serviceURL);

// Add the headers specifying their names and their values with the following method : void QNetworkRequest::setRawHeader(const QByteArray & headerName, const QByteArray & headerValue);
request.setRawHeader("User-Agent", "My app name v0.1");
request.setRawHeader("X-Custom-User-Agent", "My app name v0.1");
request.setRawHeader("Content-Type", "application/json");
request.setRawHeader("Content-Length", postDataSize);

// Use QNetworkReply * QNetworkAccessManager::post(const QNetworkRequest & request, const QByteArray & data); to send your request. Qt will rearrange everything correctly.
QNetworkReply * reply = m_qnam->post(request, jsonString);
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