上传图片，视频和Zip变得无法预览＆＃34; /＆＃34;无效＆＃34;

Question

我在这里看不到任何类似的问题，所以这就是我提出这个话题的原因。

我正在使用DropBox Core REST API制作QT C ++应用程序。我没有问题验证，我可以上传，但问题是某些类型在上传后像图像文件，视频文件和拉链一样无效，奇怪的是PDF和MP3不会失效。

[CODE - 用于上传的QT C ++代码]

// ----- Javascript

var params                      = new Object();
params.url          = "https://api-content.dropbox.com/1/files_put/"+currentPath+"/"+baseFileName+"?access_token=" + dropboxAccessToken
params.filename         = fileName;
params.basefilename     = baseFileName;
params.endpoint         = "dropboxUpload";
uploader.uploadDropBox(params);

// ----- CPP

QVariantMap paramsMap   = params.toMap();

const QString endpoint      = paramsMap.value("endpoint").toString();
const QString filename      = paramsMap.value("filename").toString();
const QString basefilename  = paramsMap.value("basefilename").toString();
const QString theurl        = paramsMap.value("url").toString();

QHttpMultiPart *multiPart = new QHttpMultiPart();

QHttpPart filePart;
QFile *file = new QFile(filename);
file->open(QIODevice::ReadOnly);
filePart.setBodyDevice(file);
file->setParent(multiPart);
multiPart->append(filePart);

QUrl urlQuery(theurl);
QNetworkRequest request(urlQuery);

QNetworkReply *reply = networkAccessManager.post(request, multiPart);
reply->setProperty("endpoint", endpoint);
multiPart->setParent(reply);
connect (reply, SIGNAL(finished()), this, SLOT(onComplete()));

[IMAGE - 突出显示的文件很好，其余的是打开时无效的文件]

[图片 - 无法预览]

[IMAGE - PDF文件成功打开没有问题]

有什么建议吗？

Answer 1

我已经解决了我的问题

QVariantMap paramsMap   = params.toMap();

const QString endpoint      = paramsMap.value("endpoint").toString();
const QString filename      = paramsMap.value("filename").toString();
const QString basefilename  = paramsMap.value("basefilename").toString();
const QString theurl        = paramsMap.value("url").toString();

QHttpPart filePart;
QFile *file = new QFile(filename);
file->open(QIODevice::ReadOnly);

QUrl urlQuery(theurl);
QNetworkRequest request(urlQuery);

QNetworkReply *reply = networkAccessManager.put(request, file->readAll());
reply->setProperty("endpoint", endpoint);
connect (reply, SIGNAL(finished()), this, SLOT(onComplete()));