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Is NSXMLParser really a streaming parser?

Subject: Is NSXMLParser really a streaming parser?
From: Christopher Woodruff <email@hidden>
Date: Thu, 1 Nov 2007 11:29:33 -0700
Delivered-to: email@hidden
Delivered-to: email@hidden

I am working on a project that requires parsing of XML data that comes from a socket stream. I want to feed an NSXMLParser object xml data from my socket connection 1 byte at a time. Is this possible?

So far I have been receiving the socket stream data from a NSFileHandle. I subscribe an object to receive the NSFileHandleReadCompletionNotification and get the NSData item from the notification. Then I initialize the XMLParser with the NSData. Will the NSXMLParser be able to parse correctly if I give it xml data 1 byte at a time? This might mean that the data I feed the XMLParser is cut in the middle of a tag or the contents.

- (void)xmlStream:(NSNotification *)notification { NSData *messageData = [[notification userInfo] objectForKey:NSFileHandleNotificationDataItem]; if ( [messageData length] == 0 ) { [xmlFileHandle readInBackgroundAndNotify]; return; } if(!xmlController) { xmlController = [[XMLcontroller alloc] init]; } [xmlController initXMLparser: messageData]; [xmlController startParse]; [xmlFileHandle readInBackgroundAndNotify]; }


Inside my xml controller object

- (void) initXMLparser:(NSData *) xmlData
{
	if(!parser)
	{
		parser = [[NSXMLParser alloc] initWithData: xmlData];
		[parser setDelegate: self];
		[parser setShouldResolveExternalEntities:YES];
	}
	
	[parser initWithData: xmlData];
	
	nc = [NSNotificationCenter defaultCenter];
}

- (void) startParse
{
	[parser parse];
}

Any insights will be greatly appreciated.

Chris Woodruff

Jet Propulsion Laboratory
M/S: 138-206
4800 Oak Grove Dr.
Pasadena, CA 91109
818-354-2412


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