Is JSF 1.2 buffering the response, or streaming it back to the browser?

Hi,
I recently implemented a simple custom component which "streams" back a file to the browser (doing some processing on it).
Using myfaces i get out of memory errors when processing large files, I later learned that the myfaces implementation actually buffers the response data before sending it back to the browser, which causes problems for me.
I would be grateful for some insight in how this works in JSF 1.2 RI.
Regards,
Mikael

Basically content interweaving is handling of JSF and non-JSF output in a way so that it appears in the rendered response the way it appears in the page.
Does in mean that the response is processed further to check if there are any expressions which needs evaluating?No we don't handle the expressions, just the insertion of content before and after the view, and the writing of state information.

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<Context debug="0" docBase="C:\MyProjects\eclipse\cdstore\WebContent" path="/cdstore" reloadable="true"/>
I have a jsp page with a jsf dataTable tag. If I change the html markup (i.e. by typing "hello" in the jsp page) and press the refresh button in my IE 6.0 browser, the "hello" message is displayed.
If, however, I change the content of a dataTable attribute (i.e. I change styleClass="aClass" to styleClass="anotherClass") or add a new dataTable attribute, the attribute changes are not sent to the browser when I press the browser refresh button. I do a "view html source" and they are not there.
I have to close the browser down and relaunch the browser to see the new dataTable attributes.
Does anybody know if there is any easier way of doing this?
thanks, jeff

Hi pushpa latha
Yes it is possible to update the data at the header level using below approach
create the component interface for your cusotm component
use the component interface in the header overview standard component as resuable component.
Implement the event handler method for the button , in the event handler method get the refreshed value
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I am getting this response when I am trying to open a file: Before viewing PDF documents in this browser you must launch Adobe Reader and accept the End User License Agreement, then Quit and relaunch the browser." What do I do?

I am getting this response when I am trying to open a file: Before viewing PDF documents in this browser you must launch Adobe Reader and accept the End User License Agreement, then Quit and relaunch the browser.” What do I do? I have opened this up in the past without a problem.

Back up all data.
If Adobe Reader or Acrobat is installed, there should be a setting in its preferences such as Display PDF in Browser. I don't use those applications myself, so I can't be more precise. Deselect that setting, if it's selected. Otherwise do as follows.
Triple-click anywhere in the line of text below on this page to select it, the copy the selected text to the Clipboard (command-C):
/Library/Internet Plug-ins
In the Finder, select
Go ▹ Go to Folder
from the menu bar, or press the key combination shift-command-G. Paste into the text box that opens (command-V), then press return.
From the folder that opens, remove any items that have "Adobe" or “PDF” in the name. You may be prompted for your login password. Then quit and relaunch Safari, and test.
The "Silverlight" web plugin distributed by Microsoft can also interfere with PDF display in Safari, so you may need to remove it as well, if it's present. The same goes for a plugin called "iGetter," and perhaps others.
If you still have the issue, repeat with this line:
~/Library/Internet Plug-ins
If you don’t like the results of this procedure, restore the items from the backup you made before you started. Relaunch Safari again.

How to Open PDF in the browser...JSF

String strUrl = http://..../xxxxxe43cb072378947fe8c1b7bcc7201691a.pdf
FacesContext faces = FacesContext.getCurrentInstance();
ExternalContext context = faces.getExternalContext();
HttpServletResponse response = (HttpServletResponse)context.getResponse();
response.sendRedirect(strURl);          Hello,
I have to open PDF in the browser, I am trying to redirect using the above code, but it is throwing exception as below. Could some one help me in this issue?
Thanks In advance
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java.lang.IllegalStateException: Cannot forward after response has been committed
Error details:
java.lang.IllegalStateException: Cannot forward after response has been committed
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     at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
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     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
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     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at com.esri.adf.web.util.ADFSessionTimeoutFilter.doFilter(Unknown Source)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Unknown Source)

You cannot send two responses per request. The solution is to let the client create two requests. Common approach is to add an onclick to the commandbutton/commandlink which opens the PDF in a new browser window and let the actual command action invoke a redirect on the current browser window.
E.g.<h:commandLink value="Download PDF" action="#{myBean.action}" onclick="window.open('http://..../xxxxxe43cb072378947fe8c1b7bcc7201691a.pdf');" />where the #{myBean.action} invokes a redirect and the http://..../xxxxxe43cb072378947fe8c1b7bcc7201691a.pdf opens the PDF in the new window.
Edit
I've read your question/problem once more and now I am a bit confused. All you want to do is to open the PDF file in a new window and you don't need to do something in the backing bean? Just use a link with target="_blank".
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Edited by: BalusC on Nov 21, 2007 7:21 AM

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Based in HTTP 1.1, I think it is possible by adding the META tag between the <HEAD> and </HEAD>:
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The MANIFEST.MF for jsf-1.2.jar is:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.7.0
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Extension-Name: javax.faces
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Implementation-Vendor-Id: com.caucho
Implementation-Vendor: Caucho Technology, Inc
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activation.jar
ejb-15.jar
hessian.jar
j2ee-management-10.jar
javamail-141.jar
jaxrpc-15.jar
jaxws-api.jar
jca-15.jar
jms-11.jar
jpa-15.jar
jsdk-15.jar
jsf-12.jar
jsr88.jar
jstl-11.jar
jta-101.jar
jws-15.jar
license.jar
portlet-10.jar
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quercus.jar
resin-deploy.jar
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Hi there,
sorry 'bout my bad English.
My jsp page have to get a rtf file and show it. Just setting the ContentPage to text/rtf, is it a solution?
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Hello,
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Ratna.

Hi,
There is no way you can close the browser window that the user opens. Even if there is a way through some hack, it will not completely give u a solution, independant of browsers and all. And moreover it is not advisable to restrict the user like that.
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I look forward to a fix, or response on how to resolve this issue.
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but if you insist on doing a wipe and install boot from the SL install DVD and start disk utility from utilities menu at the top. erase your hard drive using the erase tab in disk utility. then quit disk utility and proceed with the install. and if you do reinstall I suggest you back up your data first. otherwise it will be completely wiped when you erase your hard drive. and you should always back up anyway.
Message was edited by: V.K.

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See link.
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response.setContentType(MimeType);
String str_encoding = response.getCharacterEncoding();
System.out.println("================= The Character Encoding is --------------" + str_encoding);
int len = buf.length;
System.out.println("Data length ===========" + len);
response.setHeader("Content-Disposition", "inline;filename=" + "\"" + fileName + "\"");
OutputStream o = response.getOutputStream();
int buffer_length = 10 * 1034;
int offset = 0;
//read a thousand bytes from the buffer at a time
while ((offset <= buf.length) && (loop==true))
if ((buf.length - offset) < buffer_length)
buffer_length = buf.length - offset;
loop = false;
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o.flush();
offset = offset + buffer_length;
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I tried sending the data as a whole,but does not seem to make a difference.I was grasping at straws when I tried to break it into chunks.

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where it seems like the applications are not firing up.
However, an MSWord file shows up fine. So I go to the WEB.XML file in the TOMCAT\CONF
folder and notice that a MIME type has been set up for MSWord and not the other two.
I set one up for EXCEL and POWERPOINT but the XLS or PPT files still don't work.
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I can't figure out what's going on here.
I'm stopping and starting the TOMCAT service each time I make changes to the WEB.XML file,
but it seems like none of the changes are taking affect.
I install all the viewers for MS-Word, ppt, and excell.
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To support various file formats in IE browser while using window.open like .doc, .docx, .ppt, .pptx, .xls, xlsx etc.,
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<filter>
<filter-name>MimeFilter</filter-name>
<filter-class>com.srk.MimeFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>MimeFilter</filter-name>
<url-pattern>*.xls</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>MimeFilter</filter-name>
<url-pattern>*.xlsx</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>MimeFilter</filter-name>
<url-pattern>*.ppt</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>MimeFilter</filter-name>
<url-pattern>*.doc</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>MimeFilter</filter-name>
<url-pattern>*.docx</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>MimeFilter</filter-name>
<url-pattern>*.pptx</url-pattern>
</filter-mapping>
and then include the filter class in the declared path
import java.io.*;
import java.util.logging.*;
import javax.servlet.*;
import javax.servlet.Filter;
import javax.servlet.http.*;
public class MimeFilter implements Filter {
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletResponse httpResp = (HttpServletResponse) response;
HttpServletRequest httpReq = (HttpServletRequest) request;
String fileUrl = httpReq.getRequestURI();
if(fileUrl.lastIndexOf(".xls")!=-1)
fileUrl = fileUrl.substring(fileUrl.lastIndexOf("/")+1);
httpResp.setContentType("application/vnd.ms-excel");
httpResp.setHeader("Content-disposition", "attachment; filename="+fileUrl);
if(fileUrl.lastIndexOf(".ppt")!=-1)
fileUrl = fileUrl.substring(fileUrl.lastIndexOf("/")+1);
httpResp.setContentType("application/powerpoint");
httpResp.setHeader("Content-disposition", "attachment; filename="+fileUrl);
if(fileUrl.lastIndexOf(".doc")!=-1)
fileUrl = fileUrl.substring(fileUrl.lastIndexOf("/")+1);
httpResp.setContentType("application/msword");
httpResp.setHeader("Content-disposition", "attachment; filename="+fileUrl);
chain.doFilter(request, response);
public boolean isLoggable(LogRecord record) {
return false;
public void destroy() {
public void init(FilterConfig arg0) throws ServletException {
Please let me know your feedback.

Is JSF 1.2 buffering the response, or streaming it back to the browser?

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