Re: Excel, Struts and Downloading
Tahir, It had to do with my forward and the fact that the response was already handled. I emailed the struts user list and they took care of things for me. Thanks for the pointers! Cheers, Jon On May 28, 2007, at 3:17 AM, Tahir Akhtar wrote: OTH, if the stacktrace suggests the exception originates at the line containing response.setHeader/response.setContentType the problem might be upstream. In both cases the struts users list will be more helpful than poi. Regards, Tahir Akhtar -Original Message- From: Tahir Akhtar [mailto:[EMAIL PROTECTED] Sent: Monday, May 28, 2007 1:07 PM To: 'POI Users List' Subject: RE: Excel, Struts and Downloading Hi Jon, I am no struts expert but I think your problem lies in trying to do a forward after the writing to servlet output stream (through poi). You should not try to send a redirect after generating content on a stream. I don't know why it was working with older version of struts. Have you changed your action mappings during the upgrade? May be you can get some ideas from here http://wiki.apache.org/struts/StrutsFileDownload Regards, Tahir Akhtar -Original Message- From: Jon Wynacht [mailto:[EMAIL PROTECTED] Sent: Monday, May 28, 2007 2:57 AM To: poi-user@jakarta.apache.org Subject: Excel, Struts and Downloading Hi, I used to run Struts 1.2.9, POI 2.5 and could generate Excel files from a servlet and download them without issue. I recently upgraded to Struts 1.3.5 and POI 3 and it looks like I broke that capability. I'm getting the following error: java.lang.IllegalStateException: getOutputStream() has already been called for this response I've searched through the Net and the archives here for info but nothing really seems to fit for my situation; it's mostly JSP. I'm calling an Action servlet which makes a call to the model and gets some data, creates a new workbook and then does this: snip response.setContentType(application/vnd.ms-excel); response.setHeader(Content-disposition, attachment;filename=\attendees.xls\); response.addHeader(Content-description, Event Attendees); ServletOutputStream stream = response.getOutputStream (); wb.write(stream); stream.close(); ... forward = SUCCESS; ... return mapping.findForward(forward); /snip It's what I did before I upgraded and things worked fine. Now they don't Any ideas? Am I missing something really obvious or was I bending the rules a bit and taking chances with my data in my previous config? Cheers and thanks, Jon Jon Wynacht [EMAIL PROTECTED] http://www.objectevolution.com - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/ - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/ - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/ Jon Wynacht [EMAIL PROTECTED] http://www.objectevolution.com - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
RE: Excel, Struts and Downloading
Hi Jon, I am no struts expert but I think your problem lies in trying to do a forward after the writing to servlet output stream (through poi). You should not try to send a redirect after generating content on a stream. I don't know why it was working with older version of struts. Have you changed your action mappings during the upgrade? May be you can get some ideas from here http://wiki.apache.org/struts/StrutsFileDownload Regards, Tahir Akhtar -Original Message- From: Jon Wynacht [mailto:[EMAIL PROTECTED] Sent: Monday, May 28, 2007 2:57 AM To: poi-user@jakarta.apache.org Subject: Excel, Struts and Downloading Hi, I used to run Struts 1.2.9, POI 2.5 and could generate Excel files from a servlet and download them without issue. I recently upgraded to Struts 1.3.5 and POI 3 and it looks like I broke that capability. I'm getting the following error: java.lang.IllegalStateException: getOutputStream() has already been called for this response I've searched through the Net and the archives here for info but nothing really seems to fit for my situation; it's mostly JSP. I'm calling an Action servlet which makes a call to the model and gets some data, creates a new workbook and then does this: snip response.setContentType(application/vnd.ms-excel); response.setHeader(Content-disposition, attachment;filename=\attendees.xls\); response.addHeader(Content-description, Event Attendees); ServletOutputStream stream = response.getOutputStream (); wb.write(stream); stream.close(); ... forward = SUCCESS; ... return mapping.findForward(forward); /snip It's what I did before I upgraded and things worked fine. Now they don't Any ideas? Am I missing something really obvious or was I bending the rules a bit and taking chances with my data in my previous config? Cheers and thanks, Jon Jon Wynacht [EMAIL PROTECTED] http://www.objectevolution.com - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/ - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
RE: Excel, Struts and Downloading
OTH, if the stacktrace suggests the exception originates at the line containing response.setHeader/response.setContentType the problem might be upstream. In both cases the struts users list will be more helpful than poi. Regards, Tahir Akhtar -Original Message- From: Tahir Akhtar [mailto:[EMAIL PROTECTED] Sent: Monday, May 28, 2007 1:07 PM To: 'POI Users List' Subject: RE: Excel, Struts and Downloading Hi Jon, I am no struts expert but I think your problem lies in trying to do a forward after the writing to servlet output stream (through poi). You should not try to send a redirect after generating content on a stream. I don't know why it was working with older version of struts. Have you changed your action mappings during the upgrade? May be you can get some ideas from here http://wiki.apache.org/struts/StrutsFileDownload Regards, Tahir Akhtar -Original Message- From: Jon Wynacht [mailto:[EMAIL PROTECTED] Sent: Monday, May 28, 2007 2:57 AM To: poi-user@jakarta.apache.org Subject: Excel, Struts and Downloading Hi, I used to run Struts 1.2.9, POI 2.5 and could generate Excel files from a servlet and download them without issue. I recently upgraded to Struts 1.3.5 and POI 3 and it looks like I broke that capability. I'm getting the following error: java.lang.IllegalStateException: getOutputStream() has already been called for this response I've searched through the Net and the archives here for info but nothing really seems to fit for my situation; it's mostly JSP. I'm calling an Action servlet which makes a call to the model and gets some data, creates a new workbook and then does this: snip response.setContentType(application/vnd.ms-excel); response.setHeader(Content-disposition, attachment;filename=\attendees.xls\); response.addHeader(Content-description, Event Attendees); ServletOutputStream stream = response.getOutputStream (); wb.write(stream); stream.close(); ... forward = SUCCESS; ... return mapping.findForward(forward); /snip It's what I did before I upgraded and things worked fine. Now they don't Any ideas? Am I missing something really obvious or was I bending the rules a bit and taking chances with my data in my previous config? Cheers and thanks, Jon Jon Wynacht [EMAIL PROTECTED] http://www.objectevolution.com - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/ - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/ - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
Excel, Struts and Downloading
Hi, I used to run Struts 1.2.9, POI 2.5 and could generate Excel files from a servlet and download them without issue. I recently upgraded to Struts 1.3.5 and POI 3 and it looks like I broke that capability. I'm getting the following error: java.lang.IllegalStateException: getOutputStream() has already been called for this response I've searched through the Net and the archives here for info but nothing really seems to fit for my situation; it's mostly JSP. I'm calling an Action servlet which makes a call to the model and gets some data, creates a new workbook and then does this: snip response.setContentType(application/vnd.ms-excel); response.setHeader(Content-disposition, attachment;filename=\attendees.xls\); response.addHeader(Content-description, Event Attendees); ServletOutputStream stream = response.getOutputStream (); wb.write(stream); stream.close(); ... forward = SUCCESS; ... return mapping.findForward(forward); /snip It's what I did before I upgraded and things worked fine. Now they don't Any ideas? Am I missing something really obvious or was I bending the rules a bit and taking chances with my data in my previous config? Cheers and thanks, Jon Jon Wynacht [EMAIL PROTECTED] http://www.objectevolution.com - To unsubscribe, e-mail: [EMAIL PROTECTED] Mailing List: http://jakarta.apache.org/site/mail2.html#poi The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
