Java Development

[BB_Develpoer]

HI ,

I have to downaload  videos from and server .I am using this article to get the video file downlaoded 

http://supportforums.blackberry.com/t5/Java-Development/Download-large-files-using-the-BlackBerry-Mo...

But its not working for me as I am unable to calculate the excar byte range too request as chunk and stuck in a loop .

            while (true) {
            	log("Opening Chunk: " + chunkIndex);
            
            	conn = (HttpConnection) getHttpConnection(currentFile);
                
            	conn.setRequestMethod( HttpConnection.POST );
                conn.setRequestProperty("x-rim-transcode-content", "none");
                
                rangeStart = chunkIndex * chunksize;
                rangeEnd = rangeStart + chunksize - 1;
                log("Requesting Range: " + rangeStart +  "-" + rangeEnd);
                conn.setRequestProperty("Range", "bytes=" + rangeStart + "-" + rangeEnd);
                
                log("Http.HEADER_CONTENT_LENGTH" + conn.getHeaderField(HttpProtocolConstants.HEADER_CONTENT_LENGTH));
              
                int responseCode = conn.getResponseCode();
                if (responseCode != 200 && responseCode != 206)
                {
                	log("Response Code = " + conn.getResponseCode());
                    break;
                }
                          
                in = conn.openInputStream();
                int length = -1;
                byte[] readBlock = new byte[1024];
               
                int fileSize = 0;
                
                while ((length = in.read(readBlock)) != -1) {
                    out.write(readBlock, 0, length);
                    fileSize += length;
                    Thread.yield(); // Try not to get cut off
                }
                
                totalSize += fileSize;
                log("Chunk Downloaded: " + fileSize + " Bytes");
                chunkIndex++; // index (range) increase
                in.close();
                conn.close();
                in = null;
                conn = null;
            }
            log("Full file downloaded: " + totalSize + " Bytes");
            out.close();
            file.close();
            log("Wrote file to local storage");

Above is the code I am using ,kindly  any one help me out what I am missing

thanks in advance for your help

[peter_strange]

Can you explain what you mean by this in a bit more detail please? I am not clear on what your problem actually is.

"But its not working for me as I am unable to calculate the excar byte range too request as chunk and stuck in a loop"

[BB_Develpoer]

It is so that my video dowlaoding nerver comes to an end, the below lines never get exceuted ,

log("Full file downloaded: " + totalSize + " Bytes");
            out.close();
            file.close();
            log("Wrote file to local storage");

my get  data range keeps on going , (i get only response code 206  ), I had chnage the chunks size from 64  , 256 , 512 , 1024 but still the same  right now em testing for a video file of size 400 Kb.

Also when I check in file 0 bytes get written.

[peter_strange]

I would recommend that you try a chunk size of 64 K, so you should get the file down in about 7 chunks.  Does that work?

[BB_Develpoer]

I tried that chunk size too but issue is thr , I don't know why but the loops keep on running

I am working on OS 6 using 9780 bold simulator

[peter_strange]

And what do you see in the log? 

I'm specifically looking for thenoutput from these log statements:

log("Requesting Range: " + rangeStart +  "-" + rangeEnd);

and

log("Response Code = " + conn.getResponseCode());

Are you downloading a file or a stream?  As a clue, what is the "filename" you have defined in currentFile?  This code is intedned for files, not streams. 

[BB_Develpoer]

if I choose chunk size 64

log("Requesting Range: " + rangeStart +  "-" + rangeEnd);

it prints 0-63 at start and than keep adding on

log("Response Code = " + conn.getResponseCode());

206 get print each time

Yes I am downlaoding a video file with the extension .3GP which I had uploaded a while agon on server.

[peter_strange · Accepted solution]

I suggested using 64 K, that is 65536 bytes.  Have you tried something around that size. 

Can you try this isze and paste in the first 10 lines you get with Requesting Range.

[BB_Develpoer]

here is the log as ua sked for

log -> Opening Chunk: 0
log -> Response from server is OK for ping URL withconnection UID
log -> Requesting Range: 0-63
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 1
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 64-127
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 2
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 128-191
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 192-255
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 4
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 5
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 320-383
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 6
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 384-447
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 7
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 448-511
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 8
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 512-575
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 9
BbiAuth:ERR:No BBI Auth Token Request Engine available
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 576-639
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 10
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 640-703
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 11
log -> Response from server is OK for ping URL for https suffix legth greater than 0
log -> Requesting Range: 704-767
log -> Http.HEADER_CONTENT_LENGTH64
log -> Chunk Downloaded: 64 Bytes
log -> Opening Chunk: 12

[peter_strange]

"Chunk Downloaded: 64 Bytes"

Did I not suggest 64K bytea?