Hi Laurent:
Can't comment on NSXMLDocument but I have been using REXML with MacRuby without
any problems. Great job!
Bob Rice
On Dec 6, 2009, at 3:43 PM, s.ross wrote:
> Laurent--
>
> Sorry to be pesty about this XML thing, but I have Objective-C like this:
>
> NSString* xml = @"<people><person><name>steve</name><address>123
> main</address></person><person><name>bob</name><address>345
> First</address></person></people>";
> NSError* error = [NSError alloc];
> NSXMLDocument* xmlDoc = [[NSXMLDocument alloc] initWithXMLString:xml
> options:NSXMLDocumentTidyXML error:&error];
> NSLog(@"Created XML Document %@", xmlDoc);
> NSLog(@"Root element is %@", [xmlDoc rootElement]);
>
> NSArray* nodes = [xmlDoc nodesForXPath:@"//person" error:&error];
> NSLog(@"nodes are %@", nodes);
> for(int i = 0; i < [nodes count]; i++) {
> NSXMLElement* node = [nodes objectAtIndex:i];
> NSLog(@"Node %d is %@", i, node);
> NSArray *name = [[node nodesForXPath:@"//name" error:&error]
> objectAtIndex:0];
> NSArray *address = [[node nodesForXPath:@"//address" error:&error]
> objectAtIndex:0];
> NSLog(@"Name: %@", [name stringValue]);
> NSLog(@"Address: %@", [address stringValue]);
> }
> }
>
> Which behaves exactly as one might expect. It creates an XML document on
> which I can apply XPath queries. Using the nightly build from 5-December, the
> following MacRuby is different:
>
> error = Pointer.new_with_type("@")
> s = NSMutableString.new("<people><person><name>steve</name><address>123
> main</address></person><person><name>bob</name><address>345
> First</address></person></people>")
> xmlDoc = NSXMLDocument.alloc.initWithData(s, options:1 << 10, error:error)
> <== Fails
> NSLog("Created XML Document %@", xmlDoc)
> NSLog("Root element is %@", xmlDoc.rootElement)
>
> This produces the output:
>
> initializing
> <people><person><name>steve</name><address>123
> main</address></person><person><name>bob</name><address>345
> First</address></person></people>
> 2009-12-06 12:39:50.318 macruby[5229:903] Created XML Document
> 2009-12-06 12:39:50.321 macruby[5229:903] Root element is (null)
>
> Note the following:
>
> * initWithString is simply unrecognized as a method
> * NSXMLDocumentTidyXML constant is not defined so I just transcribed the
> equivalent bitshift
> * The resultant XML document is null
>
> I'm not filing this as a bug because I think it might be a failure on my part
> to understand how this set of methods maps onto MacRuby.
>
> Thanks,
>
> Steve
>
>
> On Dec 5, 2009, at 4:22 PM, Laurent Sansonetti wrote:
>
>> Hi Steve,
>>
>> On Dec 5, 2009, at 1:45 PM, s.ross wrote:
>>
>>> My code receives XML data from a Web Service API call that is in UTF8
>>> encoding. This winds up in a string.
>>>
>>> return_data = NSURLConnection.sendSynchronousRequest(@request,
>>> returningResponse: response, error: error)
>>> str = NSString.alloc.initWithData(return_data, encoding:
>>> NSUTF8StringEncoding)
>>> puts "******* response encoding it #{str.encoding}"
>>>
>>> The result of the puts above is 'MACINTOSH'.
>>>
>>> I suspect the encoding of the string is not UTF-8, because when I try to
>>> parse the XML using REXML, I get:
>>>
>>> RegexpError: too short multibyte code
>>>
>>> This occurs way in REXML:
>>>
>>> /Library/Frameworks/MacRuby.framework/Versions/0.5/usr/lib/ruby/1.9.0/rexml/text.rb:132:in
>>> `check:'
>>>
>>> In any case, my questions are:
>>>
>>> 1) If anyone has run across this what did you do?
>>
>> I don't believe REXML works. In any case, I would recommend to not use it.
>> Since you're already using Cocoa, why not giving NSXMLDocument a try?
>>
>>> 2) Why might the encoding be MACINTOSH and not UTF-8, as specified in the
>>> initWithData method call?
>>
>> #encoding returns the fastest encoding available for the receiver. You may
>> specify UTF-8 during the string creation, but if Cocoa can pick a smaller
>> encoding at runtime (like ASCII) it will.
>>
>> This is different from the Ruby 1.9 semantics and we have a plan to fix that
>> in 0.6.
>>
>>> 3) Suggestions?
>>
>> See my comment in 1) :)
>>
>> Laurent
>> _______________________________________________
>> MacRuby-devel mailing list
>> [email protected]
>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>
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