使用REST API和Qt与QNetworkRequest向JIRA问题添加附件

Question

I'm trying to add an attacment to an existing JIRA issue using the REST API and Qt.

When I run the code below, the reply is an empty array ("[]").

edit: updated the code

QString APIhandler::attachFile(QString fileloc, QString issueKey, QString cookie)
{

//create multiPart
QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);

QFile *file = new QFile(fileloc);
//create httpPart for file
QHttpPart filePart;

filePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/octet-stream"));
filePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file\"; filename=\""+ file->fileName()+ "\""));



file->open(QIODevice::ReadOnly); 
filePart.setBodyDevice(file);

file->setParent(multiPart);

multiPart->append(filePart);

QNetworkAccessManager *mngr = new QNetworkAccessManager();

QUrl issurl(baseURL + "/api/2/issue/"+ issueKey + "/attachments");

QNetworkRequest req(issurl);
QNetworkReply *reply ;

QEventLoop loop;

//add headers
req.setRawHeader("cookie", "JSESSIONID = " + cookie.toUtf8()); // the session cookie
req.setRawHeader("X-Atlassian-Token", "nocheck");
req.setRawHeader("Content-Type", "multipart/form-data; boundary=------------------------53a5a2cd1d9c8b7f");
//req.setRawHeader("Content-Length", postDataSize);

reply = mngr->post(req, multiPart);
multiPart->setParent(reply);
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));

loop.exec();


return reply->readAll();

}

I am using the JIRA REST API documentation and qt documentation for reference, and looking off of this java implementation (which I've tried to replicate).

It seems like I'm either missing a header, or adding the file incorrectly.

Any help is greatly appreciated!

EDIT - Here's part of a wireshark comparing the example from the api using curl (LEFT) , and my code (RIGHT). The one on the left works, and clearly has different MIME data, but I'm not sure how to implement that in Qt

Answer 1

Okay, so I figured it out. I might be the only one on earth who is using (or will use) Qt to interact with the JIRA API, but for posterity, here's what I came up with:

QString APIhandler::attachFile(QString fileloc, QString issueKey, QString cookie)
{

    QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
    QHttpPart filePart;
    QFileInfo fileInfo(fileloc);

    //what I wasn't doing before!
    multiPart->setBoundary("------------------------53a5a2cf4d9c8b7f");

    filePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"file\"; filename=\""+fileInfo.fileName() +"\""));
    filePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/octet-stream"));

    QFile *file = new QFile(fileloc);
    file->open(QIODevice::ReadOnly); 
    filePart.setBodyDevice(file);

    file->setParent(multiPart);
    multiPart->append(filePart);

    QNetworkAccessManager *mngr = new QNetworkAccessManager();

    QUrl issurl(baseURL + "/api/2/issue/"+ issueKey + "/attachments");

    QNetworkRequest req(issurl);
    QNetworkReply *reply ;

    QEventLoop loop;

    //add headers
    req.setRawHeader("X-Atlassian-Token", "nocheck");
    req.setRawHeader("cookie", "JSESSIONID = " + cookie.toUtf8()); // the session cookie
    req.setRawHeader("Content-Type", "multipart/form-data;boundary=------------------------53a5a2cf4d9c8b7f");

    reply = mngr->post(req, multiPart);
    multiPart->setParent(reply);
    QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));

    loop.exec();

    //read the reply
    QByteArray bytes=reply->readAll();

    //return the reply JSON 
    return QString::fromUtf8(bytes.data(), bytes.size());

    delete file;
    delete multiPart;
    delete reply;
    delete mngr;

}

The key part here, and what I was doing wrong, was the way in which I set the boundary for the multipart. Instead of setting it in the header, I should have used:

multipart->setBoundary()

Which you can see reflected above.

If you're coming across this and are going to use it, I'd recommend cleaning it up a bit, first. But it works!