Get the jsp content from a struts action in OC4J

[menon sandeep]

I am using struts 1.2 with OC4j container. For printing purpose i need to get the content of a jsp file generated from a struts action in a normal java class. For that i am passing the request and response object to the generate method in the java class. I hope that by overriding the getWriter() method we can achieve the functionality.

 HttpServletResponseWrapper responseWrapper = new HttpServletResponseWrapper(res) {
		            private final StringWriter sw = new StringWriter();

		            @Override
		            public PrintWriter getWriter() throws IOException {
		                return new PrintWriter(sw);
		            }

		            @Override
		            public String toString() {
		                return sw.toString();
		            }
		        };
		        request.getRequestDispatcher("action/X12N835DetailInfo?invoiceIdfromLedger="+invoiceId).include(request, responseWrapper);
		        String content = responseWrapper.toString();
		        Log.debug("Output : " + content);

But although the action is processed, the content is always empty. Please advice

[menon sandeep]

Any One please

[Joe Ess]

Please Be Patient. We are all volunteers here, answering questions in our spare time.

[menon sandeep]

I tried to get the content using HTTPClient

HttpState state = new HttpState();  
		HttpClient client = new HttpClient();  
		String requestUrl = request.getRequestURL().toString();  
		String webAppUrl = requestUrl.substring(0,  requestUrl.lastIndexOf("/"));  
		Log.info("webApp url is " + webAppUrl);  
		String url = webAppUrl+ "/X12N835DetailInfo?invoiceIdfromLedger=" + invoiceId;                        
		Log.info("url is " + url);  
		Cookie sessionCookie = new Cookie(webAppUrl, "JSESSIONID",  request.getSession(false).getId(), "/", null, false);  
		state.addCookie(sessionCookie);  
		client.setState(state);  
		GetMethod method = new GetMethod(url);  
		String temp = "";  
		try {  
			int returnCode = client.executeMethod(method);  
			Log.info("status code is " + returnCode);  
			Cookie[] cookies = client.getState().getCookies();  
			Log.info("Present cookies: ");  
			for (int i = 0; i < cookies.length; i++) {  
				Log.info(" - " + cookies[i].toExternalForm());  
			}  
			if (returnCode == HttpStatus.SC_NOT_IMPLEMENTED) {  
				Log.error("not implemented");  
			} else {  
				temp = method.getResponseBodyAsString();  
			}  
		} catch (Exception e) {  
			Log.error("Exception in httpclient ", e);  
		} finally {  
			method.releaseConnection();  
		}               }  
	Log.info("temp is " + temp); 

But still no luck as the temp variable only contains the html content for the login page although i am setting the state

[Joe Ess]

Are you trying to do this within an Action or a stand-alone Java program? If you are on the server side, HttpServletResponseWrapper makes sense. If you are on the client side, HttpClient makes sense.

[menon sandeep]

Many thanks for the reply. I am trying to do this from the server side. So i think HttpServletResponseWrapper is the correct choice
I have gone through the suggestions in the below thread which more or less matches with my requirement
http://stackoverflow.com/questions/1963158/capture-generated-dynamic-content-at-server-side
Is there any other way we can achieve the objective?

[menon sandeep]

In the filter pattern whenever a servlet with a particular url pattern is accessed, it can process the content of the resultant jsp.
Is there any other way we can invoke a servlet from a struts 1 action without using the requestDispatcher object as it includes the wrapped response also with the final result?

[Joe Ess]

I've what you are trying to do with HttpServletResponseWrapper, though the example I have handy has a bunch of other requirements that obfuscate the solution. One difference I see is that I used RequestDispatcher.forward rather than include.