HTTP request in C++ for BlackBerry 10 - c++

Question

From this webpage, I have code.
When I use "http://httpbin.org/get", everything is OK.
But when I use my own url, for example "http://my-json-server.typicode.com/typicode/demo/db", I'm getting an error:
Unable to retrieve request headers
Where is my fault?
void RequestHeaders::getRequest()
{
//const QUrl url("http://httpbin.org/get"); // OK
const QUrl url("http://my-json-server.typicode.com/typicode/demo/db"); // Not OK
QNetworkRequest request(url);
QNetworkReply* reply = m_networkAccessManager->get(request);
bool ok = connect(reply, SIGNAL(finished()), this, SLOT(onGetReply()));
Q_ASSERT(ok);
Q_UNUSED(ok);
}
void RequestHeaders::onGetReply()
{
QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());
QString response;
const QByteArray buffer(reply->readAll());
bb::data::JsonDataAccess ja;
const QVariant jsonva = ja.loadFromBuffer(buffer);
const QMap<QString, QVariant> jsonreply = jsonva.toMap();
QMap<QString, QVariant>::const_iterator it = jsonreply.find("headers");
if (it != jsonreply.end()) {
const QMap<QString, QVariant> headers = it.value().toMap();
for (QMap<QString, QVariant>::const_iterator hdrIter = headers.begin();
hdrIter != headers.end(); ++hdrIter) {
if (hdrIter.value().toString().trimmed().isEmpty())
continue;
response += QString::fromLatin1("%1: %2\r\n").arg(hdrIter.key(),
hdrIter.value().toString());
}
}
for (it = jsonreply.begin(); it != jsonreply.end(); it++) {
if (it.value().toString().trimmed().isEmpty())
continue;
response += QString::fromLatin1("%1: %2\r\n").arg(it.key(), it.value().toString());
}
reply->deleteLater();
if (response.trimmed().isEmpty()) {
response = tr("Unable to retrieve request headers");
}
emit complete(response);
}

Answer 1

Your onGetReply handler is parsing the server's HTTP response body as JSON, searching it for a "headers" child field, and if found then extracts that child's own child fields into a local response variable.
http://httpbin.org/get responds with a JSON object containing a "headers" child object that has child fields in it. So your response variable ends up not being empty.
http://my-json-server.typicode.com/typicode/demo/db responds with a JSON object that does not contain any "headers" child. So your response variable is left empty.
You need to either:
fix your server to respond with JSON that actually matches what your code is expecting.
fix your onGetReply() code to handle the JSON that your server is actually sending.