Fetch XML of Distance Matrix API (google) on iPhone

Question

I'm trying to fetch the XML data from a query to the api without success...

I'm doing this:

[...]

 NSURL *googleAPIurl = [NSURL URLWithString:@"http://maps.googleapis.com/maps/api/distancematrix/xml?origins=28.124822,-15.430006&destinations=28.126953,-15.429874|28.072056,-15.416574|28.103186,-15.417665|28.127916,-15.625403|28.099125,-15.418365|28.107740,-15.454050|28.050825,-15.454066|28.051640,-15.454104|28.101788,-15.423592|28.113750,-15.446980|28.098871,-15.420730|28.098217,-15.449371|28.083364,-15.418172&mode=driving&sensor=false"];

    NSData *xmlData = [NSData dataWithContentsOfURL:googleAPIurl];
    NSError *error;
    GDataXMLDocument *xmlDocument = [[GDataXMLDocument alloc] initWithData:xmlData options:0 error:&error];
    if (xmlDocument == nil) 
    {
        NSLog(@"NIL XML");
    }
[...]

I'm ALWAYS getting a nil XML. NSData is always nil. I don't know what is happening with this. If I use a url with one destination only it works, but not for more than one. Also, I'm using the same method to retrieve xml with google places api with no problems. This is driving me crazy...

Please point me in the right direction. Thanks in advance.

Answer 1

I suggested replacing all of the '|' with '%7C'

Turns out this is the more proper method to cover all of these character encoding issues:

NSURL *googleAPIurl = [NSURL URLWithString:[distancesURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];