wissel.net

1 - Very useful and powerful! I really like the native access to the servlet backend. Direct binary outupt is awesome.

Do you know if it's possible to set or manage desired charset in some way? I have tried

response.setCharacterEncoding("UTF-8");
response.setContentType("text/xml; charset=UTF-8");

request.setCharacterEncoding("UTF-8");

...but it doesn't seem to work when "echoing" variables from the querystring of a request (request.getParameter(<paramName>))

2 - While trying to use facesContext.getResponseStream() it returns null, but if we do
facesContext.getExternalContext().getResponse().getOutputStream()
it throws the Exception 'Can't get an OutputStream while a Writer is already in use'.

Any suggestions?

3 - Interesting but do I really have to write serious code in JavaScript?

Could you use Java instead? Enough languages in Domino already and I'm very unwilling to get into writing complex code in a language that has no type checking, no variable declaration, no debugging etc.

4 - I have to say I don't believe this works for binary output. I get exactly the same result as Sigurbjorn.

We cannot get a binary outputstream it seems.

Can you confirm you have sent binary data? XML dont count =)

S

5 - @Simon: You can do variable declarations on server side javascript to include the type: var myvar:String = "Hello World";
You can write a java class to do your bidding (just not in the default namespace) and then do:
var x = new com.acme.outputstuff.RenderX();
return x.toString();
If you want to return binary data the writer is the wrong object. You need the stream. There the same caution like servlet programming applies: once you (or something else) opens a writer to the output you can't get a stream object anymore. So when you put code into the "afterRenderResponse" event XPages had initialized the writer, so no more access to the stream is possible. To get to the stream you need to act "earlier" and use the beforeRenderResult.
stw

6 - Hi Stephan

Thanks very much for the reply. Yeah I understand all that, the bit I didn't get was that the Writer had already been setup by the afterRenderResponse event.

I had actually had that idea myself but the trouble is, I can get no output from the beforeRenderResponse event using either Writer or Stream, so I had given up. Am I missing something really obvious here?

This would really make my life fun if I could get this to work =)

Cheers

Simon

7 - Hi Stephan

Sorry if this constitutes spam =) Bet you are sorry I found this page! I did get time to do a few tests this weekend though...

First, having discovered print()!, I tried the following fragment in all events, one at a time.

print("start");
var rs = facesContext.getResponseStream();
if(rs == null) {
print("fc.getResponseStream() == null");
} else {
print(rs.getClass().getName());
}
print("end")

This prints fce.getResponseStream() == null, in all events. I don't know if this is broken or 'working as intended'


I then tried the following.

print("start");
var ex = facesContext.getExternalContext();
var response = ex.getResponse();
var rs = response.getOutputStream();
if(rs == null) {
print("response.getOutputStream() == null");
} else {
print(rs.getClass().getName());
}
print("end")

As you predicted, the getOutputStream() fails on the afterRenderResponse() event. On all other events I see the following:

10/05/2009 19:02:25 HTTP JVM: start
10/05/2009 19:02:25 HTTP JVM: com.ibm.xsp.webapp.XspHttpServletResponse$InternalOutputStream
10/05/2009 19:02:25 HTTP JVM: end
10/05/2009 19:02:25 HTTP JVM: SEVERE: CLFAD####E: Exception thrown
10/05/2009 19:02:25 HTTP JVM: SEVERE: CLFAD####E: Exception occurred servicing request for: /test/TestCharts.nsf/test.xsp - HTTP Code: 500
10/05/2009 19:02:25 HTTP Web Server: Command Not Handled Exception [/test/TestCharts.nsf/test.xsp]

Somehow, just instantiating this object causes the XSP server to explode. I have tried flushing/closing/printing rubbish.

Feels like I'm either just one step away, or doomed forever!

Thanks for your help, appreciated.

S

8 - More spam, but I beat you to it =)

If you put code into the beforeRenderResponse event, you need to tell JSF that you have finished rendering and not to proceed to the afterRenderReponse()

cue:
facesContext.responseComplete();

Really close, thanks for the pointer!

S

9 - Hi Stephan!
I've struggled with XPages and the request stream for several weeks now and found this entry that shows me that you might be the right guy to get an answer from

I'm trying to create an XPage which will be called from an HTML form POST. The HTML form will contain form fields and one or multiple fileupload controls. The XPage is created with NO UI Components (thus no FileUpload control).

I can create logic in the afterRenderResponse event that outputs the field names and values posted from the HTML form, but I can't seem to find a way to get the inputstreams (or File object or what-ever) of the uploaded files.

If I output the parameters comming in from the HTML form I can output the names and values of all fields posted, and for file uploads I get the name of the file upload control and the value is something like 'com.ibm.xsp.http.UploadedFile@6cc16cc1'. I guess that somehow it should be possible to get to the InputStream or File object of each uploaded file without using Apache Commons FileUpload or the like.

Do you know of a way to get a reference to the uploaded file(s)?

10 - @Andrew: No website, no email -> no advise.
stw

P.S.: It's mime multi-parts there are no fields in a file upload, only stream.

11 - Hi Stephan, sorry , here is my email and some more information about what I've tried to do:

Put Apache Commons File Upload ({ Link } into WebContent/WEB-INF/lib (and included the file in the Java build path) and then tried the following in both beforeRenderResponse and afterRenderResponse events:

var exCon = facesContext.getExternalContext();
var request:HttpServletRequest = exCon.getRequest();
var parser:com.acme.FormParser = new com.acme.FormParser();
parser.parseRequest(request);

com.acme.FormParser class is like:

package com.acme;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;


public class FormParser {


public FormParser() {
System.out.println("FormParser...");
}

public void parseRequest(HttpServletRequest request) {
System.out.println("parseRequest(request)...");
try {
// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
String contentType = request.getContentType();
String characterEncoding = request.getCharacterEncoding();
System.out.println("Multipart: " + isMultipart);
System.out.println("Content type: " + contentType);
System.out.println("Character encoding: " + characterEncoding);

ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
// We never get to this statement <==================================!!!
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
System.out.println("Form field " + name + " with value " + Streams.asString(stream) + " detected.");
} else {
System.out.println("File field " + name + " with file name " + item.getName() + " detected.");
}
}
} catch (FileUploadException fue) {
fue.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}

}

12 - Hi Stephan,
sorry , here is my email and some more information about what I've tried to do:

Put Apache Commons File Upload ({ Link } into WebContent/WEB-INF/lib (and included the file in the Java build path) and then tried the following in both beforeRenderResponse and afterRenderResponse events:

var exCon = facesContext.getExternalContext();
var request:HttpServletRequest = exCon.getRequest();
var parser:com.acme.FormParser = new com.acme.FormParser();
parser.parseRequest(request);

com.acme.FormParser class is like:

package com.acme;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;


public class FormParser {


public FormParser() {
System.out.println("FormParser...");
}

public void parseRequest(HttpServletRequest request) {
System.out.println("parseRequest(request)...");
try {
// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
String contentType = request.getContentType();
String characterEncoding = request.getCharacterEncoding();
System.out.println("Multipart: " + isMultipart);
System.out.println("Content type: " + contentType);
System.out.println("Character encoding: " + characterEncoding);

ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
System.out.println("We never get to this statement????");
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
System.out.println("Form field " + name + " with value " + Streams.asString(stream) + " detected.");
} else {
System.out.println("File field " + name + " with file name " + item.getName() + " detected.");
}
}
} catch (FileUploadException fue) {
fue.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}

}

13 - Hi Stephan,
I've just realized that I have submitted the above question twice. Sorry about that...
I'm still looking around for a solution or some more guidelines about how to overcome my problem regarding upload files. Hoping that you could give me some more hints as to where to look?

14 - Thanks all for your help.