qt http upload/download (inherit Qnetworkaccessmanager, including use of authenticationrequired authentication signal)

Effect

Qnetworkaccessmanager

Downloadnetworkmanager::D Ownloadnetworkmanager (Qobject *parent): Qnetworkaccessmanager (parent) {//gets the current timestamp, setting the download temp file nameQdatetime DateTime =Qdatetime::currentdatetime (); QString Date= DateTime.ToString ("yyyy-mm-dd-hh-mm-ss-zzz"); M_strfilename= QString ("e:/%1.tmp"). Arg (date); Connect ( This, SIGNAL (Finished (qnetworkreply *)), This, SLOT (replyfinished (qnetworkreply *)));} Downloadnetworkmanager::~Downloadnetworkmanager () {//Terminate Download    if(M_preply! =NULL) {m_preply-abort (); M_preply-Deletelater (); }}//set the URL and message header to start the requestvoidDownloadnetworkmanager::execute () {M_url= Qurl ("Http://192.168.*.*/download/2.0.0.zip");    Qnetworkrequest request;    Request.seturl (M_url); Request.setheader (Qnetworkrequest::contenttypeheader,"Application/zip"); Connect ( This, SIGNAL (authenticationrequired (qnetworkreply *, Qauthenticator *)), This, SLOT (Onauthenticationrequest (qnetworkreply *, Qauthenticator *))); M_preply=Get(Request); Connect (m_preply, SIGNAL (DownloadProgress (Qint64, Qint64)), This, SIGNAL (DownloadProgress (Qint64, Qint64)); Connect (m_preply, SIGNAL (Readyread ()), This, SLOT (Readyread ()));}voidDownloadnetworkmanager::replyfinished (qnetworkreply *reply) {    //Gets the response information, the status code of 200 indicates normalQvariant StatusCode = reply->attribute (Qnetworkrequest::httpstatuscodeattribute); //No error return    if(Reply->error () = =qnetworkreply::noerror) {        //Renaming Temporary Filesqfileinfo FileInfo (m_strfilename); Qfileinfo Newfileinfo= Fileinfo.absolutepath () +M_url.filename ();        Qdir dir; if(Dir.exists (Fileinfo.absolutepath ())) {if(Newfileinfo.exists ()) Newfileinfo.dir (). Remove (Newfileinfo.filename ());        Qfile::rename (M_strfilename, Newfileinfo.absolutefilepath ()); }    }    Else{QString strerror= reply->errorstring (); Qdebug ()<<"Error:"<<strerror; } Emit replyfinished (Statuscode.toint ());}//user authenticationvoidDownloadnetworkmanager::onauthenticationrequest (qnetworkreply *reply, Qauthenticator *authenticator)    {Qbytearray password; Password.append ("123456"); Password=qbytearray::frombase64 (password);    QString strpassword (password); Authenticator->setuser ("Wang"); Authenticator-SetPassword (strpassword);}//Write files locallyvoidDownloadnetworkmanager::readyread () {qfileinfo fileInfo (m_strfilename); Qfileinfo Newfileinfo= Fileinfo.absolutepath () +M_url.filename (); QString strFileName=Newfileinfo.absolutefilepath ();    Emit FileName (strFileName); //Write file-form is appendQFile file (m_strfilename); if(File.Open (qiodevice::append)) File.write (m_preply-ReadAll ()); File.close ();}

Use

Call the download () interface to start downloading, correlate downloadprogress signals and slots to get real-time information such as download size, speed, time remaining.

//Start DownloadvoidMainWindow::d ownload () {if(M_pnetworkmanager = =NULL) {M_pnetworkmanager=NewDownloadnetworkmanager ( This); Connect (M_pnetworkmanager, SIGNAL (DownloadProgress (Qint64, Qint64)), This, SLOT (DownloadProgress (Qint64, Qint64)), qt::queuedconnection); Connect (M_pnetworkmanager, SIGNAL (replyfinished (int)), This, SLOT (replyfinished (int) ), qt::queuedconnection); Connect (M_pnetworkmanager, SIGNAL (QString)), M_pfileinfolabel, SLOT (SetText (QString)), Qt::    Queuedconnection); } M_pnetworkmanager-execute (); Downloadtime.start ();}//Calculate download size, speed, remaining timevoidMainWindow::d ownloadprogress (Qint64 bytesreceived, Qint64 bytestotal) {//Total Time    intNtime =downloadtime.elapsed (); //time taken for this downloadNtime-=M_ntime; //Download Speed    DoubleDbytesspeed = (bytesreceived *1000.0) /Ntime; DoubleDspeed =Dbytesspeed; //Time RemainingQint64 leftbytes = (Bytestotal-bytesreceived); DoubleDlefttime = (Leftbytes *1.0) /Dbytesspeed; M_pspeedinfolabel-SetText (Speed (dspeed)); M_plefttimeinfolabel-SetText (TimeFormat (Qceil (Dlefttime))); M_pfilesizeinfolabel-setText (Size (bytestotal)); M_pdownloadinfolabel-setText (Size (bytesreceived)); M_pprogressbar-Setmaximum (bytestotal); M_pprogressbar-SetValue (bytesreceived); //gets the last timeM_ntime =ntime;}//Download CompletevoidMainwindow::replyfinished (intStatusCode) {M_nstatuscode=StatusCode; QString strstatus= (StatusCode = = $) ? Qstringliteral ("Download Successful"): Qstringliteral ("Download Failed"); M_pstatuslabel-SetText (strstatus);}

http://blog.csdn.net/liang19890820/article/details/50814339

qt http upload/download (inherit Qnetworkaccessmanager, including use of authenticationrequired authentication signal)