Re: Odd NSData initWithContentsOfURL: issue
Re: Odd NSData initWithContentsOfURL: issue
- Subject: Re: Odd NSData initWithContentsOfURL: issue
- From: "John C. Randolph" <email@hidden>
- Date: Tue, 15 Mar 2005 11:46:48 -0800
On Mar 13, 2005, at 10:01 PM, Nicko van Someren wrote:
On 14 Mar 2005, at 3:27, Michael J. Sherman wrote:
I'm trying to grab XML files from various URLs and save the XML
file to disk as a text file.
...
NSData *theXMLFile = [[NSData alloc] initWithContentsOfURL:xmlURL];
...
It works for most URLs I try. But there are some that result in
binary garbage data in the blaa.xml file! I'm wondering if anyone
has any clue where I can look to start figuring this out.
I ran into the same problem the other day but with the
initWithContentsOfURL: message in NSXMLParser instead of NSData.
Another site that fails is the C|Net RSS feed at: http://
news.com.com/2547-1_3-0-5.xml At the time I didn't have enough
time to fully test things and then I went off on holiday but seeing
your mail made me come back and look at this again.
It seems that there is a real bug in the initWithContentsOfURL:
code for NSData and NSString and by extension every class that uses
them. A quick check of the headers sent with the request shows
that they include:
Accept-Encoding: gzip, deflate;q=1.0, identity;q=0.5, *;q=0
The problem is that when the server does send back gziped data it's
not getting unpacked. I just tried your code to download from the
site you mentioned and from CNet and the resulting files unpack
just fine on the command line using gunzip.
I will file a bug report with Apple. Given that 10.3.9 is in seed
already I guess it won't get fixed before Tiger :-(
That would be a feature request, rather than a bug report. -
initWithContentsOfURL: is supposed to give you whatever's at that
URL, without any modifications.
-jcr
John C. Randolph <email@hidden> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html
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