Problem with XML parsing on iPhone - iphone

Question

When I receive data from web service my NSMutableData is filled with following XML:
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><GetWeatherResponse xmlns="http://www.webserviceX.NET"><GetWeatherResult><?xml version="1.0" encoding="utf-16"?>
<CurrentWeather>
<Location>BERLIN MUNICIPAL AIRPORT, NH, United States (KBML) 44-35N 71-11W 345M</Location>
<Time>Oct 19, 2010 - 03:52 AM EDT / 2010.10.19 0752 UTC</Time>
<Wind> Calm:0</Wind>
<Visibility> 10 mile(s):0</Visibility>
<SkyConditions> clear</SkyConditions>
<Temperature> 23.0 F (-5.0 C)</Temperature>
<DewPoint> 21.0 F (-6.1 C)</DewPoint>
<RelativeHumidity> 91</RelativeHumidity>
<Pressure> 29.83 in. Hg (1010 hPa)</Pressure>
<Status>Success</Status>
</CurrentWeather></GetWeatherResult></GetWeatherResponse></soap:Body></soap:Envelope>
So when I search for "CurrentWeather" parser can't find it because of &qt, &lt etc. How to fix my NSMutableData to have normal values (<, > etc.)?
COMPLETE CODE
#import "DemoWebServiceConsumeViewController.h"
#implementation DemoWebServiceConsumeViewController
#synthesize cityName;
#synthesize activityIndicator;
#synthesize location;
- (IBAction) hideKeyboard{
[cityName resignFirstResponder];
}
- (IBAction) buttonClicked: (id)sender{
[cityName resignFirstResponder];
NSString *soapMsg =
[NSString stringWithFormat:
#"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
"<soap:Body>"
"<GetWeather xmlns=\"http://www.webserviceX.NET\">"
"<CityName>%#</CityName>"
"<CountryName>%#</CountryName>"
"</GetWeather>"
"</soap:Body>"
"</soap:Envelope>", cityName.text, #"united states"
];
NSLog(soapMsg);
NSURL *url = [NSURL URLWithString:
#"http://www.webservicex.com/globalweather.asmx"];
NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];
//---set the headers---
// here copy method name to be called SOAP Action read from WS description
NSString *msgLength = [NSString stringWithFormat:#"%d", [soapMsg length]];
[req addValue:#"text/xml; charset=utf-8"
forHTTPHeaderField:#"Content-Type"];
[req addValue:#"http://www.webserviceX.NET/GetWeather"
forHTTPHeaderField:#"SOAPAction"];
[req addValue:msgLength forHTTPHeaderField:#"Content-Length"];
//---set the HTTP method and body---
[req setHTTPMethod:#"POST"];
[req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]];
[activityIndicator startAnimating];
conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];
if (conn) {
webData = [[NSMutableData data] retain];
}
}
-(void) connection:(NSURLConnection *) connection
didReceiveResponse:(NSURLResponse *) response {
[webData setLength: 0];
}
-(void) connection:(NSURLConnection *) connection
didReceiveData:(NSData *) data {
[webData appendData:data];
}
-(void) connection:(NSURLConnection *) connection
didFailWithError:(NSError *) error {
[webData release];
[connection release];
}
-(void) connectionDidFinishLoading:(NSURLConnection *) connection {
NSLog(#"DONE READING WEATHER WEB SERVICE. Received Bytes: %d", [webData length]);
NSString *theXML = [[NSString alloc]
initWithBytes: [webData mutableBytes]
length:[webData length]
encoding:NSUTF8StringEncoding];
//---shows the XML---
NSLog(theXML);
[theXML release];
[activityIndicator stopAnimating];
if (xmlParser)
{
[xmlParser release];
}
xmlParser = [[NSXMLParser alloc] initWithData: webData];
[xmlParser setDelegate:self];
[xmlParser setShouldResolveExternalEntities:YES];
[xmlParser parse];
[connection release];
[webData release];
}
//---when the start of an element is found---
-(void) parser:(NSXMLParser *) parser
didStartElement:(NSString *) elementName
namespaceURI:(NSString *) namespaceURI
qualifiedName:(NSString *) qName
attributes:(NSDictionary *) attributeDict {
NSLog(elementName);
if( [elementName isEqualToString:#"GetWeatherResult"])
{
if (!soapResults)
{
soapResults = [[NSMutableString alloc] init];
}
elementFound = YES;
}
else if([elementName isEqualToString:#"Location"])
{
elementFound = YES;
}
}
-(void)parser:(NSXMLParser *) parser foundCharacters:(NSString *)string
{
if (elementFound)
{
[soapResults appendString: string];
}
}
-(void)parser:(NSXMLParser *)parser
didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName
{
if ([elementName isEqualToString:#"GetWeatherResult"])
{
NSLog(soapResults);
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"Current Temperature!"
message:soapResults
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
[soapResults setString:#""];
elementFound = FALSE;
}
}
#end

Answer 1

I've edited your question so it shows what I think is what you meant to paste. It looks like the web service is encapsulating a whole XML file as a string inside another XML tag. So what you need to do is get the entire content of the <GetWeatherResult> XML tag as a single string. I think NSXMLParser will automatically substitute the correct characters in place of > etc.
Having got that string, you need to pass it into another NSXMLParser to parse the content of it.