QHttpMultiPart：将文件发布到PHP脚本

我在Qt5中工作，正在努力实现多部分上传。我的脚本尽可能接近以下内容：

 QUrl testUrl("http://localhost/upload/test.php");
 QNetworkRequest request(testUrl);


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

 QString preview_path  = "C:/preview.jpg";
 QHttpPart previewPathPart;
 previewPathPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"preview_path\""));
 previewPathPart.setBody(preview_path.toLatin1());

 QHttpPart previewFilePart;
 previewFilePart.setHeader(QNetworkRequest::ContentTypeHeader, QVariant( "image/jpeg"));
 previewFilePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"preview_file\""));
 QFile *file = new QFile(preview_path);

 if (!file->exists()) {
     emit error(tr("Upload Error. File does not exist: ") + preview_path);
     return;
 }
 file->open(QIODevice::ReadOnly);
 previewFilePart.setBodyDevice(file);
 file->setParent(multiPart); // we cannot delete the file now, so delete it with the multiPart

 multiPart->append(previewPathPart);
 multiPart->append(previewFilePart);

 reply = networkManager->post(request, multiPart);
 multiPart->setParent(reply); // delete the multiPart with the reply

 connect(reply, SIGNAL(finished()),
          this, SLOT  (uploadReply()));

 connect(reply, SIGNAL(error(QNetworkReply::NetworkError)),
          this, SLOT  (uploadError(QNetworkReply::NetworkError)));

 connect(reply, SIGNAL(uploadProgress(qint64, qint64)),
          this, SLOT  (uploadProgress(qint64, qint64)));

然后我的uploadReply（）插槽只打印回复：

QString data = (QString) reply->readAll();
qDebug() << data;

我的进度槽显示了大致正确的上传字节数

但结果显示：

 preview_path: C:/preview.jpg
 preview_file exists: true
 $_FILES: Array
 (
 )
 preview_file content: ????

看起来字节是作为$\u POST变量提交的，而不是应该作为$\u文件提交的？apache日志中没有错误。如何调试此问题？

已解决

感谢您的提示-我在QHttpPart的内容配置中添加了“filename”，现在它可以按预期上传了。我认为文件名是可选的，但在这种情况下似乎有效。希望这对其他人有帮助

QString preview_name = "preview.jpg";

QHttpPart previewFilePart;
previewFilePart.setHeader(QNetworkRequest::ContentTypeHeader,    QVariant("image/jpeg"));
previewFilePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"preview_file\"; filename=\""+ preview_name + "\""));

---

我的PHP是这样说的：

警告：多部分/表单数据中缺少边界在第0行的未知中发布数据

有什么方法可以调试它吗？

QString preview_name = "preview.jpg";

QHttpPart previewFilePart;
previewFilePart.setHeader(QNetworkRequest::ContentTypeHeader,    QVariant("image/jpeg"));
previewFilePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant("form-data; name=\"preview_file\"; filename=\""+ preview_name + "\""));