Well after doing more tests...
It happens even if I only have 1 active connection.... and it also
happens even if only download 1 part of the multiparts file (i.e. the
part is still slightly bigger than it should be) so basically the
files that were ending up ok with multiple connections are still fine,
the files that were ending up bigger than they should... are still
bigger....
What I *don't* understand is how the data can be bigger .... I would
understand if some bytes were lost... but added?? I just don't see why
it's happening... I'm tempted to re-write my ConnectionController with
NetSocket to see if I get the same result...
On 19-Dec-08, at 4:55 AM, [email protected] wrote:
I think that this there is still not enough example code here to help.
I use AsyncSocket extensively and any trouble I have had with data
transfer has been my fault entirely.
-(void)onSocket:(AsyncSocket *)sock didReadData:(NSData*)data
withTag:(long)tag
Having said that I always use the AsyncSocket method
- (void)readDataToLength:(CFIndex)length withTimeout:
(NSTimeInterval)timeout tag:(long)tag;
Maybe not possible in your case if you don't know the transfer size
to begin with.
Maybe try constructing some test data of a known size that causes
failure.
Then swap your call to
(void)onSocket:(AsyncSocket *)sock didReadData:(NSData*)data withTag:
(long)tag
for a single call to
- (void)readDataToLength:(CFIndex)length withTimeout:
(NSTimeInterval)timeout tag:(long)tag;
using your known data length.
Should help to sort out were the data is getting mishandled.
It's a bit hard to track because the setup,as I said, works with
multiple simultaneous connections etc, but it's really straight
forward: ONE socket downloads ONE segment and save it to disk...
the decoder deals with putting all the segments together once all
the segments of a file have been downloaded... but most segments
have extra bytes in them...
Does the problem only arise when multiple connections are active, or
can it be triggered in a single isolated transfer?
And to make it workse, sometimes (usually when I grab stuff like
images or smaller stuff like that which consist of only 1 segment)
then they end up just fine... the extra bytes are only present with
bigger attachment (of 1mb+) and especially with multiparts
attachments...
This is not worse, its better. Implies that the problem may arise
from conjoining the segments.
Jonathan Mitchell
Central Conscious Unit
http://www.mugginsoft.com
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