Cannot read XML File
got a little problem with receiving the contents of a xml file (using To开发者_运维技巧uchXML).
My first query works very well, looks something like this:
NSString *url = [NSString stringWithFormat:STATION_ID, latitude, longtitude];
CXMLDocument *rssParser = [[CXMLDocument alloc] initWithContentsOfURL:[NSURL URLWithString:url] options:0 error:nil];
NSLog(@"%@",rssParser);
so this log gives me the complete XML file.
after that, in another method im trying the same:
NSString *url = [NSString stringWithFormat:WEATHER_URL, [positionInformation objectForKey:@"stationId"]];
CXMLDocument *rssParser = [[CXMLDocument alloc] initWithContentsOfURL:[NSURL URLWithString:url] options:0 error:nil];
NSLog(@"%@", rssParser);
but the log im getting is (null). Loggin the URL String gives me the right URL without spaces or something, the URL Log for example looks like this:
NSString *url = [NSString stringWithFormat:WEATHER_URL, [positionInformation objectForKey:@"stationId"]];
NSLog(@"%@", url);
The result in the debugger Console is
http://api.wunderground.com/weatherstation/WXCurrentObXML.asp?ID=KCASUNNY19
looking at this file with my browser seems to be ok. Anybody know whats going wrong?????
I also tried, first to get the content of this URL by stringWithContentsOfURL, but this also not worked.
This guy was having the same problem: http://www.iphonedevsdk.com/forum/iphone-sdk-development/15963-problem-initwithcontentsofurl.html. Looks like the API at Weather Underground is expecting a user-agent and returning a 500 HTTP response when it doesn't see one. You can use -initWithData:options:error:
on CXMLDocument to pass the data you get using NSMutableURLRequest.
You should try using the error argument of initWithContentsOfURL:options:error:. Create an NSerror *object, and pass it in thusly:
NSError *error;
CXMLDocument *rssParser = [[CXMLDocument alloc] initWithContentsOfURL:[NSURL URLWithString:url] options:0 error: &error];
If you don't get an rssParser object, check that error.
i copied the content of this xml file to my own server and changed the url path. this works correcty, so i think there is a problem with reading this ".asp" file.
hmm. but its XML content, strange.
//edit: i made a little php file on my server that returns the content of the "asp" file:
<?php
echo file_get_contents("http://api.wunderground.com/weatherstation/WXCurrentObXML.asp?ID=KCASANFR70");
?>
reading the contents of my script works, but this workaround is not what i want.
oh damn =/
Are you sure that your URL string is properly encoded, so that the question mark gets interpreted as a query? You might want to look at using dataUsingEncoding
or stringUsingEncoding
on your URL before using it to initialize rssReader
.
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