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- (id)initWithURL:(NSURL *)newURL {
if((self = [super initWithURL:newURL])) {
[self addRequestHeader:@"Accept-Encoding" value:@"gzip"];
}
return self;
}
- (NSString *)dataString {
if (!receivedData) {
return nil;
}
NSData* data;
if([[self.responseHeaders objectForKey:@"Content-Encoding"] rangeOfString:@"gzip"].location != NSNotFound) {
data = [self uncompressData:[self receivedData]];
} else {
data = [self receivedData];
}
if([[self.responseHeaders objectForKey:@"Content-Type"] rangeOfString:@"utf"].location != NSNotFound) {
return [[[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding] autorelease];
} else {
return [[[NSString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSASCIIStringEncoding] autorelease];
}
}
- (NSData *)uncompressData:(NSData*)compressedData {
if ([compressedData length] == 0) return compressedData;
unsigned full_length = [compressedData length];
unsigned half_length = [compressedData length] / 2;
NSMutableData *decompressed = [NSMutableData dataWithLength: full_length + half_length];
BOOL done = NO;
int status;
z_stream strm;
strm.next_in = (Bytef *)[compressedData bytes];
strm.avail_in = [compressedData length];
strm.total_out = 0;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
if (inflateInit2(&strm, (15+32)) != Z_OK) return nil;
while (!done)
{
if (strm.total_out >= [decompressed length])
[decompressed increaseLengthBy: half_length];
strm.next_out = [decompressed mutableBytes] + strm.total_out;
strm.avail_out = [decompressed length] - strm.total_out;
status = inflate (&strm, Z_SYNC_FLUSH);
if (status == Z_STREAM_END) done = YES;
else if (status != Z_OK) break;
}
if (inflateEnd (&strm) != Z_OK) return nil;
if (done)
{
[decompressed setLength: strm.total_out];
return [NSData dataWithData: decompressed];
}
else return nil;
}
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