What is the meaning of NSXMLParserErrorDomain error 5.?

Question

Ok, I am back on this task. I have my XML properly download from my webserver with a URL pointing to the server's file, however, when I detect the network is 'unreachable' I simply point the URL to my application's local XML and I get the following error (N.B. the file is a direct copy of the one on the server).

I cannot find detail description, but I think it is saying that the URL is pointing to an inaccessible location. Am I storing this resource in the wrong location? I think I want it in the HomeDirectory / Library??

Debug output

loadMyXml: /var/mobile/Applications/950569B0-6113-48FC-A184-4F1B67A0510F/MyApp.app/SampleHtml.xml
2009-10-14 22:08:17.257 MyApp[288:207] Wah! It didn't work. Error Domain=NSXMLParserErrorDomain Code=5 "Operation could not be completed.   (NSXMLParserErrorDomain error 5.)" 
2009-10-14 22:08:17.270 MyApp[288:207] Operation could not be completed. (NSXMLParserErrorDomain error 5.)

Exude

Answer 1

According to Dave DeLong,

That means it's having issues parsing your file.

I think it may be the XSLT reference in the XML - as it points to the webserver. I will review and get back to this question with an improved answer.

It was the path of the file. My code wasn't even close to the right location -- and I was missing a trailing letter 's'. The error code definition implies a "premature end of file", which caused me to truncate my file without any success. I then went back to basics and iterated on the file system to look for my file.

I debugged by using the NSFileManager to iterate to my file and then verified that it was loadable with the contentsAtPath method. I was able to dump it with NSLog(). Once I was convinced that the file was well-formed and loaded in raw form, I made certain that my NSURL was constructed with the same syntax and methods. Then it loaded correctly. Now I can load either a network file "full-featured" content or a local "sample" content.

NSDirectoryEnumerator *dirEnumerator = [[NSFileManager defaultManager] enumeratorAtPath: NSHomeDirectory()];
NSString *something;
NSString *f;

while( something = [dirEnumerator nextObject] ) {
    f = [[[NSString alloc] initWithFormat: @"%@/%@", NSHomeDirectory(), something] autorelease];
    if( [f hasSuffix :@"two_cookies.xml"] ){
    NSData *nsData = (NSData*) [[NSFileManager defaultManager] contentsAtPath: f];
        NSLog(@"%@", nsData );
    }
}

Output

2009-10-22 00:47:40.147 MyApp[13843:20b] <?xml version="1.0" encoding="iso-8859-1"?>

P.S. I hope my being explicit here is helpful to others as they debug their data processing.

Exude

BTW - I later did find the enumerations in the SDK documentation. It is very helpful, although not completely intuitive. – Exude

I had a similar problem because I was loading my file using [NSURL URLWithString:pathToFile]; Instead, that should be: [NSURL fileURLWithPath:pathToFile]; I too spent a long time looking at how my file might not be well formed, might be missing, etc before realizing that it was such a simple subtle difference. NO is also not working with me... still I am getting error no 5. – Metabolize

Answer 2

Along the same lines as the accepted answer, I had a similar problem because I was loading my file using:

[NSURL URLWithString:pathToFile];  // **Wrong**

Instead, that should be:

[NSURL fileURLWithPath:pathToFile];

I too spent a long time looking at how my file might not be well formed, might be missing, etc before realizing that it was such a simple subtle difference.

Feucht

Yup! That difference is subtle and buried in the docs. Good idea to highlight. +1 – Exude

Answer 3

The explaination from Apple is: http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSXMLParser_Class/Reference/Reference.html#//apple_ref/doc/c_ref/NSXMLParserPrematureDocumentEndError

Parser Error Constants

The following error types are defined by NSXMLParser.

typedef enum {
   NSXMLParserPrematureDocumentEndError = 5

And the explaination of the error is:

NSXMLParserPrematureDocumentEndError

The document ended unexpectedly.

Available in Mac OS X v10.3 and later.

Declared in NSXMLParser.h.

Peltate

Thanks Michael. Apparently the error is also returned when the filename is incorrect. The answer from Dave DeLong (see above) led me to my mistake. I also noted that I found the documentation. – Exude