Qt HTTP post文件

太过爱你忘了你带给我的痛 2021-11-26 14:06 456阅读 0赞

用Qt与服务器进行文件交互，开始想的用ftp，由于文件不大，不超过2M，所以互联网的同事建议用HTTP post。下面把Qt post文件的方法记录一下。

bool CImpedianceReport::PostPicture(int report_id, QString fileName)
    {
        //设置发送的数据
        bool bRet = false;
        QHttpMultiPart *multiPart = new QHttpMultiPart(QHttpMultiPart::FormDataType);
    
        //
        QHttpPart utPart;
        utPart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant(QString("form-data; name=\"record_rcc_id\"")));
        utPart.setBody(QByteArray::number(report_id));
    
        //
        QHttpPart imagePart;
        imagePart.setHeader(QNetworkRequest::ContentDispositionHeader, QVariant(QString("form-data; name=\"%1\"; filename=\"%2\"")
                                                                                .arg("file1").arg(QFileInfo(fileName).fileName())));
        QFile *file = new QFile(fileName);      //由于是异步，所以记得一定要new
        file->open(QIODevice::ReadOnly);
        imagePart.setBodyDevice(file);          //方便后续内存释放
        file->setParent(multiPart); // we cannot delete the file now, so delete it with the multiPart
        imagePart.setHeader(QNetworkRequest::ContentTypeHeader, "image/png");
    
        //
        multiPart->append(utPart);
        multiPart->append(imagePart);
    
        //设置头信息
        QNetworkRequest networkRequest;
        networkRequest.setUrl(QUrl("http://report.cgwzjs.com/index.php/Api/report/uploadfiles"));
    
        //发送请求
        QEventLoop loop;
        QNetworkAccessManager manager;
        QObject::connect(&manager, SIGNAL(finished(QNetworkReply*)), &loop, SLOT(quit()));
    
        QNetworkReply *reply = manager.post(networkRequest, multiPart);
        multiPart->setParent(reply); // delete the multiPart with the reply
        loop.exec();
    
        QByteArray data = reply->readAll();
        qDebug() << QString(data);
    
        QNetworkReply::NetworkError error = reply->error();
        if(error == QNetworkReply::NoError)
        {
            //{"status":1,"msg":"上传成功","info":{"file_url":{"file1":"/Uploads/image/1/41.png"}}}
            Json::Value root;
            Json::Reader reader;
            if(reader.parse(data.data() ,root))
            {
                if(root["status"].asInt() == 1)
                {
                    bRet = true;
                }
            }
        }
        else
        {
                qDebug() << "post file error:" << QString(data);
        }
        reply->deleteLater();
        return bRet;
    }