Downloading from the web using Download Manager Symbian API

Comments

Jp4symbian - Devices supported

Hi,

Can you please mention the devices on which this code is successfully tested. I am facing some issues with Nokia N79 & E63.

jp4symbian 15:22, 3 November 2011 (EET)

Hamishwillee - The ArticleMetaData says ....

Hi Jp4symbian

The ArticleMetaData (top right of page) says that this has been tested on Nokia 5800 XpressMusic, Nokia N97, Nokia N97 Mini. You might want to put a query on the discussion boards and cross link to this article for other devices. If you find any exceptions, please record them here.

Regards

Hamish

hamishwillee 05:38, 4 November 2011 (EET)

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Article Metadata

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Code Example

Source file: Media:ProgressiveDownload.zip

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Tested with

Devices(s): Nokia 5800 XpressMusic, Nokia N97, Nokia N97 Mini

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Compatibility

Platform(s): S60 3rd Edition FP2, S60 5th Edition

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Article

Keywords: RHttpDownloadMgr

Created: User:Kbwiki (03 Jun 2010)

Last edited: hamishwillee (01 Aug 2012)

==Overview==

Download Manager API can be used for handling download events, such as start, pause, and reset. It can also be used to move or delete downloaded content. For more details, see Download Manager API: Using the Download Manager API.

Header files

#include <DownloadMgrClient.h> //for S60 3rd FP2, S60 5th Edition

Library Files

LIBRARY DownloadMgr.lib

Code Snippet

Create a download manager session:

RHttpDownloadMgr iDMgr;
iDMgr.ConnectL( TUid::Uid( KThisAppUid ), *this, ETrue );

Create the UI Library Registry:

CDownloadMgrUiLibRegistry * iUiReg;
iUiReg = CDownloadMgrUiLibRegistry::NewL( iDMgr );

Install the User Interactions (dialogs) and get a pointer to them:

CDownloadMgrUiUserInteractions* idMgrUserInteractions;
idMgrUserInteractions = &iUiReg->RegisterUserInteractionsL();

Register a Downloads List:

CDownloadMgrUiDownloadsList * iMgrDownloadsList;
iMgrDownloadsList = &iUiReg->RegisterDownloadsListL();

The function HandleDMgrEventL() is called whenever a download begins, completes, pauses, or fails.

void CProgressiveDownloadAppUi::HandleDMgrEventL( RHttpDownload&  aDownload,
THttpDownloadEvent aEvent )
{  
switch ( aEvent.iDownloadState )
{
 case EHttpDlCreated:
 {
  iMgrDownloadsList->DisplayDownloadsListL(); 
  break;
 }
 case EHttpDlInprogress:
 {
  // iEikonEnv->InfoWinL(_L("Progress"),_L(" "));
  break;
 }
 case EHttpDlCompleted:
 {
  iEikonEnv->InfoWinL(_L("Completed"),_L(" "));
  break;
 }
 case EHttpDlFailed:
 {
  iEikonEnv->InfoWinL(_L("Failed"),_L(" "));
  break;
 }
 case EHttpDlPaused:
 {
  //DownloadPausedL( aDownload, aEvent );
  break;
 }
 default :
 {
  //iEikonEnv->InfoWinL(_L("Default"),_L(" "));
  break;	  
 }
}	
}

Starting the Download

The URL from where the file has to be downloaded. The filename could be any location, even memory card (e:).

 
TBuf8<128> url = _L8("http://abc/movie.3gp");
TFileName filename(_L("c:\\data\\movie.3gp"));
iDMgr.SetStringAttribute(EDlAttrDestFilename,filename);

Create a new download subsession with the URL taken as the first parameter. isNewDl is true if Download is created. If the URL is already downloaded, it is set as false.

TBool isNewDl ;
RHttpDownload& dl = iDMgr.CreateDownloadL( url, isNewDl );

If isNewDl is true:

User::LeaveIfError( dl.Start() );

Closing the Download Manager session:

iDMgr.DeleteAll();
iDMgr.Close();

Sample Application

File:ProgressiveDownload.zip