QNAM query fails but ReST passes

[ocgltd]

I am using QNetworkAccessManager to access a ReST service. All works fine from the command line using "curl".

However, when run from QNAM the ReST service repies with

"{"message":"invalid method"}"

The URL I pass to QNAM is identical to that provided to curl. Is there some other header/parameter I must set for a ReST query to work?

[ocgltd]

Ok figured it out...(based on some generic 405 error information on StackOverflow). This error is common when using POST instead of GET (or vice versa).

I just assumed they were interchangable - but I was wrong. Well, maybe this will help someone else....

[SGaist]

Hi,

Whiteout knowing your request nor the QNAM code, it's not possible to help.

[ocgltd]

@SGaist I notice that when I use CURL, the server records a reply with 405 code. But when run from my C code it replies with a 200 code. In case that's a clue.

I have posted my code below...hopefully something stands out...

```
QUrlQuery postData;
for (QPair<QString,QString> dataPair : m_queryItems) {
    postData.addQueryItem(dataPair.first, dataPair.second);
}

QNetworkRequest request;
request.setUrl(QUrl(m_URL));
qDebug() << QUrl(m_URL).toString();

request.setHeader(QNetworkRequest::ContentTypeHeader,"application/json");

if (!m_authUsername.isEmpty()) {
    // HTTP Basic authentication header value: base64(username:password)
    QString authInfo = m_authUsername + ":" + m_authPassword;
    QByteArray authInfoB64 = authInfo.toLocal8Bit().toBase64();
    QString authHeaderData = "Basic " + authInfoB64;
    request.setRawHeader("Authorization", authHeaderData.toLocal8Bit());
}

m_NAMobject = new QNetworkAccessManager();
connect(m_NAMobject, &QNetworkAccessManager::finished, this, &TL_RQ_Normal::slot_replyFinished, Qt::QueuedConnection);
connect(m_NAMobject, &QNetworkAccessManager::sslErrors, this, &TL_RQ_Normal::slot_checkVersion_SSLErrors, Qt::QueuedConnection);
m_replyPtr = m_NAMobject->post(request, postData.toString(QUrl::FullyEncoded).toUtf8());

[hskoglund]

Hi, it seems a bit odd the postData is a QUrlQuery with name=value pairs, usually you'll write some json into the postData.
Also, are you setting the -X POST switch in your curl command line?

[ChrisW67]

@hskoglund said in QNAM query fails but ReST passes:

usually you'll write some json into the postData.

Especially since this is what @ocgltd told the server the payload was going to be:

request.setHeader(QNetworkRequest::ContentTypeHeader,"application/json");

[ocgltd]

Ok figured it out...(based on some generic 405 error information on StackOverflow). This error is common when using POST instead of GET (or vice versa).

I just assumed they were interchangable - but I was wrong. Well, maybe this will help someone else....