I'm trying
to parse a call from Geonames with NSXMLParser in the iPhone SDK. I've used this before but for some reason I'm getting an empty
dictionary back even though I get results back in a web browser. Can someone please point out what I may be doing wrong.
Below is the code I'm using and the results that comes back pasting it in a browser.
Thanks in advance
#pragma mark -
#pragma mark - Parcer Services
-(void)beginLoadingFeed{
//[self startLoadingWithMessage:@"Loading Results...."];
NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(loadFeed) object:nil];
[operationQueue addOperation:operation];
[operation release];
}
- (void)loadFeed{
NSString *path = [NSString stringWithFormat:@"http://ws.geonames.org/postalCodeSearch?placename=%@&long&maxRows=20",self.location];
[Logger log:@"Geonames Query: %@",path];
[self parseXMLFileAtURL:path];
[self performSelectorOnMainThread:@selector(didfinishedLoadingFeed) withObject:nil waitUntilDone:YES];
}
-(void)didfinishedLoadingFeed{
}
- (void)parserDidStartDocument:(NSXMLParser *)parser{
[Logger log:@"found file and started parsing"];
}
//Called when the parser runs into an open tag (<tag>)
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
if ([elementName isEqualToString:@"code"]) {
currentResult = [NSMutableDictionary dictionary];
} else {
currentElement = [elementName copy];
}
}
//This is just
to resolve random HTML entities
- (NSData *)parser:(NSXMLParser *)parser resolveExternalEntityName:(NSString *)entityName systemID:(NSString *)systemID {
return [entityName dataUsingEncoding:NSASCIIStringEncoding];
}
- (void)parseXMLFileAtURL:(NSString *)URL{
self.results = [[[NSMutableArray alloc] init] autorelease];
NSURL *xmlURL = [NSURL URLWithString:URL];
NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
[parser setDelegate:self];
[parser parse];
[parser autorelease];
}
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {
NSString * errorString = [NSString stringWithFormat:@"Unable
to connect
to web site (Error code %i )", [parseError code]];
[Logger log:@"error parsing : %@", errorString];
[self stopLoadingView];
[self showMessage:@"Error loading content" withTitle:@"Error Loading"];
}
/*** Called when the parser runs into a close tag (</tag>). If it is the Result tag that is closing, we should add the currentResult
to the array, and then forget about it ***/
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:@"code"]) {
[self.results addObject:currentResult];
currentResult = nil;
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
[Logger log:@"all done!"];
[Logger log:@"results array has %d items", [self.results count]];
[Logger log:@"Results:%@",results];
[theTableView reloadData];
[self stopLoadingView];
}
Below is the result that comes back in a browser using the same call above when doing the search for the term "boston":
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<geonames>
<totalResultsCount>2808</totalResultsCount>
<code>
<postalcode>02101</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.370567</lat>
<lng>-71.026964</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02108</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.357603</lat>
<lng>-71.068432</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02109</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.360027</lat>
<lng>-71.054495</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02110</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.357636</lat>
<lng>-71.051417</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02111</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.350348</lat>
<lng>-71.0629</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02114</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.361111</lat>
<lng>-71.06823</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02115</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.342706</lat>
<lng>-71.092215</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02116</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.349201</lat>
<lng>-71.076798</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02118</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.336162</lat>
<lng>-71.072854</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02128</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.364197</lat>
<lng>-71.025694</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02199</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.347873</lat>
<lng>-71.082543</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02210</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.348921</lat>
<lng>-71.046511</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02215</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.347088</lat>
<lng>-71.102689</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>22713</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>38.538241</lat>
<lng>-78.142285</lng>
<adminCode1>VA</adminCode1>
<adminName1>Virginia</adminName1>
<adminCode2>047</adminCode2>
<adminName2>Culpeper</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>24592</postalcode>
<name>South Boston</name>
<countryCode>US</countryCode>
<lat>36.696335</lat>
<lng>-78.918829</lng>
<adminCode1>VA</adminCode1>
<adminName1>Virginia</adminName1>
<adminCode2>083</adminCode2>
<adminName2>Halifax</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02102</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.338947</lat>
<lng>-70.919635</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02103</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.338947</lat>
<lng>-70.919635</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02104</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.338947</lat>
<lng>-70.919635</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02105</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.338947</lat>
<lng>-70.919635</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
<code>
<postalcode>02106</postalcode>
<name>Boston</name>
<countryCode>US</countryCode>
<lat>42.354318</lat>
<lng>-71.073449</lng>
<adminCode1>MA</adminCode1>
<adminName1>Massachusetts</adminName1>
<adminCode2>025</adminCode2>
<adminName2>Suffolk</adminName2>
<adminCode3/>
<adminName3/>
</code>
</geonames>
