petersteinberger.com
bits about life, coding and stuff
Search
Use TTURLXMLResponse with server that send you the wrong encoding
24 Jun2010
That took long. I am parsing RSS, but _one_ particular feed would not parse, the console screamed “NSXMLParserErrorDomain error 9″.
So some stuff in encoding was weird. I replicated the feed on my server, voila, worked like a charm. http://beta.feedvalidator.org finally brought some light into the issue: “Your feed appears to be encoded as “UTF-8″, but your server is reporting “iso-8859-1″”
Okay. So the server fucked up. But we can’t change that, so let’s make our parser more robust. I am using TTURLXMLResponse (see their TTTwitter example on github)
So let’s override that! See the middle part for my change/hack/improvement. (Call it whatever you want)
@implementation VIURLXMLResponse
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark TTURLResponse
// overridden from TTURLResponse to hack around voest rss feed!
- (NSError*)request:(TTURLRequest*)request processResponse:(NSHTTPURLResponse*)response
data:(id)data {
// This response is designed for NSData objects, so if we get anything else it's probably a
// mistake.
TTDASSERT([data isKindOfClass:[NSData class]]);
TTDASSERT(nil == _rootObject);
if ([data isKindOfClass:[NSData class]]) {
NSString *utf8Response = [[[NSString alloc] initWithData:data encoding: NSUTF8StringEncoding] autorelease];
// oh ooh. server sent us data in ISO-8859-1? [hack around standards]
// http://stackoverflow.com/questions/1207867/nsxmlparser-rss-issue-nsxmlparserinvalidcharactererror
if (!utf8Response) {
NSString *dataString = [[[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding] autorelease];
data = [dataString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
}
TTDCONDITIONLOG(TTDFLAG_XMLPARSER, @"Data: %@", [[[NSString alloc] initWithData:data encoding: NSUTF8StringEncoding] autorelease]);
TTXMLParser* parser = [[TTXMLParser alloc] initWithData:data];
parser.delegate = self;
parser.treatDuplicateKeysAsArrayItems = self.isRssFeed;
[parser parse];
_rootObject = [parser.rootObject retain];
TT_RELEASE_SAFELY(parser);
}
return nil;
}
@end
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
#pragma mark -
#pragma mark TTURLResponse
// overridden from TTURLResponse to hack around voest rss feed!
- (NSError*)request:(TTURLRequest*)request processResponse:(NSHTTPURLResponse*)response
data:(id)data {
// This response is designed for NSData objects, so if we get anything else it's probably a
// mistake.
TTDASSERT([data isKindOfClass:[NSData class]]);
TTDASSERT(nil == _rootObject);
if ([data isKindOfClass:[NSData class]]) {
NSString *utf8Response = [[[NSString alloc] initWithData:data encoding: NSUTF8StringEncoding] autorelease];
// oh ooh. server sent us data in ISO-8859-1? [hack around standards]
// http://stackoverflow.com/questions/1207867/nsxmlparser-rss-issue-nsxmlparserinvalidcharactererror
if (!utf8Response) {
NSString *dataString = [[[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding] autorelease];
data = [dataString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
}
TTDCONDITIONLOG(TTDFLAG_XMLPARSER, @"Data: %@", [[[NSString alloc] initWithData:data encoding: NSUTF8StringEncoding] autorelease]);
TTXMLParser* parser = [[TTXMLParser alloc] initWithData:data];
parser.delegate = self;
parser.treatDuplicateKeysAsArrayItems = self.isRssFeed;
[parser parse];
_rootObject = [parser.rootObject retain];
TT_RELEASE_SAFELY(parser);
}
return nil;
}
@end
Related posts:
- In: Random Stuff
2 Responses to Use TTURLXMLResponse with server that send you the wrong encoding
christian
July 28th, 2010 at 12:52 pm
hi , i have same problem, but dont use tturlxmlresponse?
I use the standart NXMLParser
Do you know what and where to fix there to get it run?
I could even provide my parser should it help.
thx
chris
Tassi
August 13th, 2010 at 7:06 pm
schöne Seite