PDA

View Full Version : Unzip




yaniv92648
Jul 12, 2010, 02:34 AM
Hi,
i have a url inwhich there's a zip file i wanna unzip. i tried zlib, gzip, NSDataCategory (the methods zlibInflate, gzipInflate) and more..
but without success. i would like please a simple example of converting a zip file (NSData *) to an unzipped file (NSData *).
Thank u very much.



robbieduncan
Jul 12, 2010, 02:55 AM
What has failed about the approaches you have tried. Post the code that you have tried and explain in each case exactly what failed and where.

yaniv92648
Jul 12, 2010, 03:26 AM
NSData *zippedFile = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]]; // works well

zippedFile size: 1543 Bytes

unZippedFile should be about 5.5 KB

i imported zlib, gzip, minizip, ZipArchive and NSDataCategory:

NSData *zippedGzipDeflate = [zippedFile gzipDeflate];
NSData *zippedGzipInflate = [zippedFile gzipInflate];
NSData *zippedZlibDeflate = [zippedFile zlibDeflate];
NSData *zippedZlibInflate = [zippedFile zlibInflate];

zippedGzipDeflate.length = 1566 Bytes
zippedGzipInflate.length = 0 Bytes
zippedZlibDeflate.length = 1554 Bytes
zippedZlibInflate.length = 0 Bytes

i also tried ZipArchive: UnzipFileTo, UnzipOpenFile.

http://stackoverflow.com/questions/412982/iphone-unzip

http://www.iphonedevsdk.com/forum/iphone-sdk-development/7615-simple-objective-c-class-zip-unzip-zip-format-files.html

http://stackoverflow.com/questions/1546541/how-can-we-unzip-a-file-in-objective-c

http://forums.macrumors.com/showthread.php?t=750332

http://www.flyblog.info/catprogramming/202.html

http://www.iphonekicks.com/objectivec/Objective_C_class_for_zip_unzip_zip_format_files

i feel like it's right under my nose and i can't find how 2 do it...

TZRaceR6
Jul 12, 2010, 03:38 AM
I use a program called Stuffit. You can do a google search on it to find out about it. You have to pay for the full version, but there is a trial version for free.

yaniv92648
Jul 12, 2010, 03:49 AM
i wanna do it programmatically through objective-c code

robbieduncan
Jul 12, 2010, 03:49 AM
I use a program called Stuffit. You can do a google search on it to find out about it. You have to pay for the full version, but there is a trial version for free.

This is about iPhone Programming and programmatically unzipping a file. A Mac OS application is totally irrelevant.

Edit: Just as a test can you unzip the file correctly with the Mac OSX unzip in The Finder?

yaniv92648
Jul 12, 2010, 03:52 AM
when i paste the url in the address bar it automatically downloads, unzips the file and open the unzipped file.

robbieduncan
Jul 12, 2010, 03:53 AM
OK, so it's unlikely to be a problem with the file itself. Are there any messages printed to the console? Do you have the source to the unzip methods you are using? If so step through in the debugger and check what's going on.