Re: Cocoa framework or Object class to uncompress files
On Oct 25, 2022, at 12:12 AM, Markus Spoettl wrote: > > On 10/25/22 3:45 AM, Carl Hoefs via Cocoa-dev wrote: >> My iOS app downloads a gzip'd data file into its sandbox that the app needs >> to unzip >> and process. I don't see anything in Cocoa (such as NSFileManager) that >> addresses >> uncompressing files. Is there a way? >> (BTW, I tried some ancient 3rd party code called ZipArchive but it always >> fails trying >> to parse the zipped file.) >> I'm hoping there's a built-in solution or framework that I'm just >> overlooking. > > I'm using an NSData extension that uses : > > https://github.com/schacon/igithub/blob/master/CocoaGit/Util/NSData%2BCompression.m > > Is very easy to use and works very well. You need to add "-lz" to the "Other > Linker Flags" linker option in the target build settings of your project. > Wow, that works perfectly! And it handles both ZIP and GZIP! It's also efficient: It inflates a 120MB file in 0.28 secs. Awesome! (BTW, I added "libz.tbd" to the project, and it works. But what is with the .tbd extension?) Thanks so much for this, I was about to give up hope! -Carl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Cocoa framework or Object class to uncompress files
On 10/24/22 6:45 PM, Carl Hoefs via Cocoa-dev wrote: My iOS app downloads a gzip'd data file into its sandbox that the app needs to unzip and process. I don't see anything in Cocoa (such as NSFileManager) that addresses uncompressing files. Is there a way? (BTW, I tried some ancient 3rd party code called ZipArchive but it always fails trying to parse the zipped file.) I'm hoping there's a built-in solution or framework that I'm just overlooking. It's not clear whether you're aware that gzip and zip are not the same thing. So if you take a gzip file and feed it to a zip decoder, that's not going to work. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Cocoa framework or Object class to uncompress files
On 10/25/22 3:45 AM, Carl Hoefs via Cocoa-dev wrote: My iOS app downloads a gzip'd data file into its sandbox that the app needs to unzip and process. I don't see anything in Cocoa (such as NSFileManager) that addresses uncompressing files. Is there a way? (BTW, I tried some ancient 3rd party code called ZipArchive but it always fails trying to parse the zipped file.) I'm hoping there's a built-in solution or framework that I'm just overlooking. I'm using an NSData extension that uses : https://github.com/schacon/igithub/blob/master/CocoaGit/Util/NSData%2BCompression.m Is very easy to use and works very well. You need to add "-lz" to the "Other Linker Flags" linker option in the target build settings of your project. Regards Markus -- __ Markus Spoettl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Cocoa framework or Object class to uncompress files
No. There’s no solution there. The Archive framework makes uncompressing of raw data easy, including the compression format that’s normally used inside .zip files, but it doesn’t actually read .zip file format. The file format and the compression algorithm are, in effect, unrelated to each other. It’s not extremely hard to read the .zip file format directly, though there’s not really a single standard of which parts of the spec actually need to be implemented. I implemented something based on this: https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT but the implementation is not mine to give away, sorry. > On Oct 24, 2022, at 19:19, Marco S Hyman via Cocoa-dev > wrote: > >> I'm hoping there's a built-in solution or framework that I'm just >> overlooking. > > Guess: The Apple Archive framework > > https://developer.apple.com/documentation/applearchive ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Cocoa framework or Object class to uncompress files
> > I'm hoping there's a built-in solution or framework that I'm just overlooking. Guess: The Apple Archive framework https://developer.apple.com/documentation/applearchive ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Cocoa framework or Object class to uncompress files
My iOS app downloads a gzip'd data file into its sandbox that the app needs to unzip and process. I don't see anything in Cocoa (such as NSFileManager) that addresses uncompressing files. Is there a way? (BTW, I tried some ancient 3rd party code called ZipArchive but it always fails trying to parse the zipped file.) I'm hoping there's a built-in solution or framework that I'm just overlooking. -Carl ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
