Re: Internal Server Error / DirectAction

Hi, Simon,

On Apr 7, 2006, at 8:13 AM, Simon wrote:

> Hi Jerry - thanks.
>
> How do I log the requests and response ?

Try adding the following code to your WO Application class's  
constructor method:

     String theResponse;
     theResponse = System.getProperty("DisplayHeaders");
     displayHeaders = ("true".equals(theResponse) || "YES".equals 
(theResponse));
     LOGGER.debug("displayHeaders = " + ( displayHeaders ? "YES" :  
"NO" ));
		
     theResponse = System.getProperty("DisplayHeaderContent");
     displayHeaderContent = ("true".equals(theResponse) ||  
"YES".equals(theResponse));
     LOGGER.debug("displayHeaderContent = " +  
( displayHeaderContent ? "YES" : "NO" ));

Then add the following method to your WO app's Application class:

     public WOResponse dispatchRequest( WORequest request )
     {
		if (displayHeaders) {
			LOGGER.debug( "*********** The request = " + request.toString() );
			if (displayHeaderContent)
				LOGGER.debug( "*********** The request content = " +  
request.contentString() );
		}
		WOResponse response = super.dispatchRequest( request );
		if (displayHeaders) {
			LOGGER.debug( "*********** The response = " + response.toString() );
			if (displayHeaderContent)
				LOGGER.debug( "*********** The response content = " +  
response.contentString() );
		}
         return response;
     }

Finally, set the two runtime parameters, DisplayHeaders and  
DisplayHeaderContent, appropriately to log the requests and responses  
to determine where the holdup is occurring in the network.

The code is a modification of something I got from Chuck Hill (either  
his & Sacha's book or a response on one of the lists, I don't  
remember). It also presumes that you're running log4j. If you're not,  
then change the LOGGER.debug messages to System.out.println, or some  
other appropriate logging statements.

> I think the problem might be that the external system is streaming  
> the file to us, and hence when i call request().contentString() i  
> am getting a null. i have changed the code now to use the  
> WOStreamRequestHandler instead of the WODirectActionHandler and am  
> just waiting for the supplier to change the url they are posting to.

That sounds like a strong possibility.

HTH

Regards,
Jerry

> Simon
> On 6 Apr 2006, at 20:57, Jerry W. Walker wrote:
>> Hi, Simon,
>>
>> I suggest two things:
>>
>>   * take a look at the network and Apache logs
>>
>>   * if the request is getting through to your application, log the  
>> requests and responses.
>>
>> Regards,
>> Jerry
>>
>> On Apr 6, 2006, at 1:08 PM, Simon wrote:
>>
>>> Hi all -
>>>
>>> i'm working on an interface to a external system which is posting  
>>> an xml file to our application. the external system http-post's  
>>> the file to a url, with the filename as the single parameter in  
>>> the url - eg:
>>>
>>> http://claney.com/cgi-bin/WebObjects/Handler.woa/wa/DirectAction/ 
>>> handler?filename=EBO_DETAIL_MM_35_0000000142.xml
>>>
>>> My handler action simply writes the file to disk, and looks like  
>>> this:
>>>
>>> 	public WOActionResults handoffAction() {
>>> 		String result = "";
>>> 		try {
>>> 			String content = request().contentString();
>>> 			String filename = request().formValueForKey 
>>> ("filename").toString();
>>> 			BufferedWriter out = new BufferedWriter(new FileWriter("/ 
>>> Library/Handoffs/"+filename));
>>> 			out.write(content);
>>> 			out.close();
>>> 			result = "OK";
>>> 		} catch (Exception e) {
>>> 			System.out.println(e.getMessage());
>>> 			result = Utilities.getStackTrace(e);
>>> 			System.out.println(result);
>>> 		}
>>> 		Main pg = (Main)pageWithName("Main");
>>> 		pg.setResponseMessage(result);
>>> 		return pg;
>>> 	}
>>>
>>>
>>> However, the external system is reporting an Internal Server error:
>>>
>>> *****2006-04-05T09:07:26:5565 Info      NETWORK SERVICE@EVOLVIWEB03
>>> *****
>>> *****  3480 -  2773 Videcom.Utils.HttpHelper
>>> Sending to http://claney.com/cgi-bin/WebObjects/Handler.woa/wa/ 
>>> DirectAction/handoff?filename=EBO_DETAIL_MM_35_0000000142.xml
>>> *****2006-04-05T09:07:27:1502 Error      NETWORK SERVICE@EVOLVIWEB03
>>> *****
>>> *****  3480 -  2773 Videcom.TravelPackOnline.KernelServer.Transport
>>> Error when HTTPing file EBO_DETAIL_MM_35_0000000142.xml to http:// 
>>> claney.com/cgi-bin/WebObjects/Handler.woa/wa/DirectAction/ 
>>> handoff. Exception = The remote server returned an error: (500)  
>>> Internal Server Error
>>>
>>>
>>> Unfortunately the external system is a supplier, and therefore I  
>>> have no access to their code (and to be honest their developers  
>>> are not being too helpful). there is nothing showing in the  
>>> webobjects logs.
>>>
>>> any ideas where i start to debug this ?
>>>
>>> thanks, simon

--
__ Jerry W. Walker,
    WebObjects Developer/Instructor for High Performance Industrial  
Strength Internet Enabled Systems

     [email protected]
     203 278-4085        office