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[skinnytron]

Here is quick easy solution to unzip a gzip file into memory using zlib.

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
	NSString *sourcePath = [NSString stringWithFormat:@"%@/myFile.txt.gz", [Utility getDocumentsPath]];
	
	NSFileManager *fileManager = [NSFileManager defaultManager];
	[fileManager createFileAtPath:sourcePath contents:data attributes:nil];
	
	gzFile file = gzopen([sourcePath UTF8String], "rb");
	
	unsigned char buffer[CHUNK];
	
	int uncompressedLength = gzread(file, buffer, CHUNK);
	
	NSData *uncompressedData = [NSData dataWithBytes:buffer length:uncompressedLength];
	NSString *txtFile = [[NSString alloc] initWithData:uncompressedData encoding:NSASCIIStringEncoding];

	gzclose(file);
	[fileManager removeItemAtPath:sourcePath error:nil];
}