[Doktorfaust]

I'm trying to access an object via SOAP, but am struggling with Apple's objective-c implementation. After lots of messing around, I thought I came up with something that should work.... yet it doesn't.

I'm trying to access Terraserver and use this method: http://terraserver-usa.com/TerraServ...ToNearestPlace -- also, here is the WSDL file.

My output looks like this:

Code:
<?xml.version="1.0".encoding="UTF-8"?>

<SOAP-ENV:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" 
SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" 
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
	<SOAP-ENV:Body>	
		<m:ConverLonLatPtToNearestPlace xmlns:m="http://localhost/TerraWebSite/">
			<point xsi:type="m:LonLatPt">
				<Lon xsi:type="xsd:double">-123.19995</Lon>
				<Lat xsi:type="xsd:double">44.02597</Lat>
			</point>
		</m:ConvertLonLatPtToNearestPlace>
	</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

What's wrong???

[Diggory Laycock]

Have you tried using WSMakeStubs on that WSDL?

[Diggory Laycock]

Code:
Widebook:~ diggory$ /Developer/Tools/WSMakeStubs -x ObjC -name TerraStubs -url "http://terraserver-usa.com/TerraService2.asmx?WSDL"

Should get you what you need:

Code:
<snip>


/*-
 *   Method Name:  ConvertLonLatPtToNearestPlace
 * Documentation:  <no documentation>
 */
@implementation ConvertLonLatPtToNearestPlace
- (void) setParameters:(CFTypeRef /* Complex type http://localhost/TerraWebSite/|ConvertLonLatPtToNearestPlace */) in_parameters
{
    id _paramValues[] = {    
        in_parameters,        
    };    
    NSString* _paramNames[] = {    
        @"parameters",        
    };    
    [super setParameters:1 values: _paramValues names: _paramNames];    
}

- (id) resultValue
{
    return [[super getResultDictionary] objectForKey: @"parameters"];    
}

- (WSMethodInvocationRef) genCreateInvocationRef
{
    return [self createInvocationRef    
               /*endpoint*/: @"http://terraserver-usa.com/TerraService2.asmx"            
                 methodName: @"ConvertLonLatPtToNearestPlace"            
                 protocol: (NSString*) kWSSOAP2001Protocol            
                      style: (NSString*) kWSSOAPStyleRPC            
                 soapAction: @"http://localhost/TerraWebSite/ConvertLonLatPtToNearestPlace"            
            methodNamespace: NULL /* No Method Namespace specified */            
        ];        
}

@end; /* ConvertLonLatPtToNearestPlace */
<snip>

"The test form is only available for requests from the local machine." sounds worrying. What is the test form? and why are there so many references to localhost?

[Doktorfaust]

Originally posted by Diggory Laycock:
Have you tried using WSMakeStubs on that WSDL?

Yes, I've done it both with WSMakeStubs and manually, calling the C functions directly. WSMakeStubs required some modification to the output in order to make things run at all. In both cases I then I had to add a "metadata" key to the dictionary in order to set a ComplexType (for LatLonPt). I have both the more manual approach and the WSMakeStubs approach producing the same output I pasted above.

I need to figure out what's wrong the XML being sent that Terraserver will only give me back a default response: it defaults to lat=0, lon=0 and tells me I'm about 800 km off of the Ivory Coast. Clearly it's not understanding the coordinates I send it.

thanks,
DF

[Doktorfaust]

Originally posted by Diggory Laycock:
"The test form is only available for requests from the local machine." sounds worrying. What is the test form? and why are there so many references to localhost?

Good question -- I tried a few things just now.

The "soapAction" action definitely needs to be specified exactly as is shown in the example. When I have

Code:
SOAPAction: "http://terraserver-usa.com/ConvertLonLatPtToNearestPlace"

the request fails with "in _parseFault". However, when I have it written as,

Code:
SOAPAction: "http://localhost/TerraWebSite/ConvertLonLatPtToNearestPlace"

The request goes through and I get a response -- though it's always for that default latitude and longitude.

I'm thinking it's a namespace problem -- probably related to the line:

Code:
<m:ConverLonLatPtToNearestPlace xmlns:m="http://localhost/TerraWebSite/">

Hmmmm.....

[Doktorfaust]

It turns out the problem is with Microsoft's TerraServer, not the request being made. They don't properly handle namespace aliases. So by removing the alias to "http://localhost/TerraWebSite/", (:m), everything worked fine.

Here's a tip though for anyone trying to debug something like this. You can directly send whatever information you want to a server simply by using telnet. So to send the packet I wanted to terraserver, I simply type

Code:
jearly$ telnet terraserver-usa.com 80

And then fire away with whatever request I wanted. In this case, something like

Code:
POST /TerraService2.asmx HTTP/1.1
Host: terraserver-usa.com
Content-Type: text/xml; charset=utf-8
Content-Length: 457
SOAPAction: "http://localhost/TerraWebSite/ConvertLonLatPtToNearestPlace"

<?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>
    <ConvertLonLatPtToNearestPlace xmlns:m="http://localhost/TerraWebSite/">
      <point>
        <Lon>-120.0</Lon>
        <Lat>44.0</Lat>
      </point>
    </ConvertLonLatPtToNearestPlace>
  </soap:Body>
</soap:Envelope>

TerraServer responds...