Re: NSURLDownload and web sharing server
Re: NSURLDownload and web sharing server
- Subject: Re: NSURLDownload and web sharing server
- From: Elliott <email@hidden>
- Date: Fri, 15 Jan 2010 10:50:26 -0800 (PST)
Hi Mark,
I downloaded Abyss http server and it seems to happen with this as well on localhost. It seems to stop after downloading about 4mb or so.
I came across this while developing a larger app (App A) that also does some IPC through the run loop. I noticed while testing this that App A will pause at a certain time during the download. When I quit another app (App B) that was connected to App A via IPC, App A will get a message via the run loop and it seems to make the download continue a little more -- I added some NSLogs to the NSURLDownload callbacks and they seem to start up again briefly after the quit. The download will then hang again immediately. I couldn't find anywhere where I specifically stopped the run loop. Then I simplified it with the source I sent and it seemed to happen there as well.
I was thinking that this was being caused by the download occurring too fast. I tried sprinkling in some sleeps but it doesn't seem to help. I also wonder if this is a Snow Leopard thing. I only started seeing this after I upgraded to Snow Leopard.
Elliott
--- On Thu, 1/14/10, Mark Pauley <email@hidden> wrote:
> From: Mark Pauley <email@hidden>
> Subject: Re: NSURLDownload and web sharing server
> To: "Elliott" <email@hidden>
> Cc: email@hidden
> Date: Thursday, January 14, 2010, 3:54 PM
> Thanks for reporting this issue, and
> thanks for the reproducible test case. Can you quickly
> confirm for me the version of Apache you're talking to on
> Port 127.0.0.1? IIRC, Apache 1.x has a known limit of
> 4GB despite it's HTTP 1.1 'compliance'
>
> If you're using apache 2 and greater, then this may well be
> a bug in NSURLDownload (though the fact that it works with
> other servers is intriguing).
>
> _Mark
>
> On Jan 14, 2010, at 2:51 PM, Elliott wrote:
>
> > When downloading a large file (~6 GB) either on
> 127.0.0.1 or another machine on the same subnet via web
> sharing, NSURLDownload seems to hang at some point in the
> middle of the download. This doesn't seem to happen
> when using other servers. Also Safari seems to be able
> to download the file just fine. The client is using
> 10.6.2. I've tried web sharing on the local machine
> (127.0.0.1 and 10.6.2) and also on a remote machine using
> 10.5.8. I've written a simple tool to test this that
> looks like:
> >
> > - (void)downloadDidFinish: (NSURLDownload *)download
> > {
> > NSLog(@"downloadDidFinish");
> >
> > // release the connection
> > [download release];
> > }
> >
> >
> > - (void)download: (NSURLDownload *)download
> didFailWithError: (NSError *)error
> > {
> > NSLog(@"download
> didFailWithError\n");
> > // release the connection
> > [download release];
> >
> > // inform the user
> > NSLog(@"Download failed! Error - %@
> %@",
> > [error
> localizedDescription],
> > [[error
> userInfo] objectForKey:NSErrorFailingURLStringKey]);
> > }
> >
> >
> > - (void)download: (NSURLDownload *)download
> didReceiveResponse: (NSURLResponse *)response
> > {
> > NSLog(@"download
> didReceiveResponse\n");
> > }
> >
> > - (void)download: (NSURLDownload *)download
> didReceiveDataOfLength: (unsigned)length
> > {
> > NSLog(@"download
> didReceiveDataOfLength %lld\n", length);
> > }
> >
> > int main (int argc, const char * argv[])
> > {
> > NSAutoreleasePool * pool =
> [[NSAutoreleasePool alloc] init];
> > MyHandler
> *theHandler =
> [[MyHandler alloc] init];
> >
> > NSMutableURLRequest *theRequest =
> [NSMutableURLRequest requestWithURL: [NSURL URLWithString:
> (NSString *)@"http://10.147.27.137/~elliott/winxp.hdd";]
> >
>
>
>
>
> cachePolicy:
> NSURLRequestReloadIgnoringCacheData/*NSURLRequestUseProtocolCachePolicy*/
> >
>
>
>
>
> timeoutInterval: 60.0];
> >
> > // create the connection with the
> request
> > // and start loading the data
> > NSURLDownload *theDownload =
> [[NSURLDownload alloc] initWithRequest: theRequest delegate:
> theHandler];
> >
> > [theDownload setDestination:
> (NSString *)@"/Users/elliott/Documents/testdownloadfile"
> allowOverwrite: YES];
> > CFRunLoopRun();
> > [pool drain];
> > return 0;
> > }
> >
> > At some point I stop getting download
> didReceiveDataOfLength and never get a downloadDidFinish nor
> didFailWithError. Am I doing something wrong?
> >
> > Elliott
> >
> >
> >
> > _______________________________________________
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