Instruments is reporting 2 objects leaked with every call to a Soap Web Service with code generated by SudzC.
I've narrowed it down a simple case, using code calling a free public web service ( http://www.webservicex.net/geoipservice.asmx?WSDL ) and no authentication. Unfortunately, getting a SudzC project running requires a lot of set up, but you can see the generated code by putting the WSDL URL into http://www.sudzc.com/ and choosing 'Objective-C from iOS'.
Leaked Object # Address Size Responsible Library Responsible Frame
Malloc 1.00 KB, 0x5035400 1.00 KB Foundation-[NSCFString appendString:]
NSCFString, 0x4c3d390 32 Bytes Foundation -[NSPlaceholderMutableString init]
The call stack for each object is
3 Foundation -[NSCFString appendString:]
4 SoapDemo +[Soap createEnvelope:forNamespace:forParameters:withHeaders:] /Users/user1/Desktop/SRC/SoapDemo/SoapDemo/Soap/Soap.m:50
5 SoapDemo +[Soap createEnvelope:forNamespace:withParameters:withHeaders:] /Users/user1/Desktop/SRC/SoapDemo/SoapDemo/Soap/Soap.m:114
6 SoapDemo -[WSXGeoIPService GetGeoIP:action:IPAddress:] /Users/user1/Desktop/SRC/SoapDemo/SoapDemo/Generated/WSXGeoIPService.m:55
7 SoapDemo -[SoapDemoViewController callWebService] /Users/user1/Desktop/SRC/SoapDemo/SoapDemo/SoapDemoViewController.m:14
8 SoapDemo -[SoapDemoViewController press:] /Users/user1/Desktop/SRC/SoapDemo/SoapDemo/SoapDemoViewController.m:19
The calling code:
- (IBAction)press:(id)sender {
NSLog(@"pressed");
[self callWebService];
}
-(void)callWebService {
WSXGeoIPService* service = [WSXGeoIPService service];
[service GetGeoIP:self action:@selector(handleResponse:) IPAddress:@"209.85.147.103"];
}
-(void) handleResponse:(id)value{
NSLog(@"%@", value);
}
The offending line in Soap.m according to instruments in [Soap createEnvelope] looks quite inoffensive (marked with a comment).
+ (NSString*) createEnvelope: (NSString*) method forNamespace: (NSString*) ns forParameters: (NSString*) params withHeaders: (NSDictionary*) headers
{
NSMutableString* s = [NSMutableString string];
[s appendString: @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"];
[s appendFormat: @"<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/\" xmlns=\"%@\">", ns];
if(headers != nil && headers.count > 0) {
[s appendString: @"<soap:Header>"];
for(id key in [headers allKeys]) {
if([[headers objectForKey: key] isMemberOfClass: [SoapNil class]]) {
[s appendFormat: @"<%@ xsi:nil=\"true\"/>", key];
} else {
[s appendString:[Soap serializeHeader:headers forKey:key]];
}
}
[s appendString: @"</soap:Header>"];
}
[s appendString: @"<soap:Body>"];
[s appendFormat: @"<%@>%@</%@>", method,[params stringByReplacingOccurrencesOfString:@"&" withString:@"&"], method];
[s appendString: @"</soap:Body>"];
[s appendString: @"</soap:Envelope>"]; // *** this is reported as causing the leak ***
return s;
}
I have tried modifying the method (by combining appendString calls, adding some dummy logging etc.) but the leak always occurs in this method.
I can think of a few possibilities:
Can anyone deduce what is happening (or how to find this out)?
I am using iOS SDK 4.3.
Plan B is to convert the project to Automatic Reference Counting...
For those who don't, please follow my changes to fix your leaks, as it perfectly works:
id postData
to NSString* postData
@property (copy, nonatomic) NSString* postData
(Here, I additionally changed all of the NSString property delcarations to "copy")(SoapRequest*) create: (SoapHandler*) handler action: (SEL) action urlString: (NSString*) urlString soapAction: (NSString*) soapAction postData: (NSString*) postData deserializeTo: (id) deserializeTo
change the row request.postData = [postData retain]
to request.postData = postData
.These 3 steps will solve your problems. Hope it will be also implemented in the SudzcC framework as well.