I don't set no-cache. I control caching by adding a unique string (current time in milliseconds) the query string. That way if the browser calls the exact same string, which can only happen when it is repeating the same internal request, it is allowed to use it's own internal cache.
Matt Savino > -----Original Message----- > From: alex [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, March 05, 2002 9:47 AM > To: [EMAIL PROTECTED] > Subject: Re: FO -> PDF works with Netscape, not with IE > > > I think Matt was saying that you *shouldn't* set no-cache in > order to fix > the problem of IE fetching twice. > However in my experience you need to set no-cache.... > > The following code is copied from an oldish posting by Matt > himself.... > I think the commented out bits are the ones you are thinking of.... > > Matt seemed to look into the possibility of setting a cache > limit (eg 15 > minutes) but I couldn't see how to do that.... > > Alex > > > ByteArrayOutputStream out = new ByteArrayOutputStream(); > > org.apache.fop.apps.Driver driver = new > org.apache.fop.apps.Driver(); > driver.setErrorDump(true); > driver.setRenderer(driver.RENDER_PDF); > driver.setupDefaultMappings() ; > driver.setOutputStream(out); > driver.render(foDoc); > > response.setContentType("application/pdf"); > /* > if (isIE4) { > // response.setHeader("Cache-Control", "no-cache"); > // response.setHeader("Pragma", "no-cache"); > } > else { > response.setHeader("Cache-Control", "private"); > } > */ > byte[] content =3D out.toByteArray(); > response.setContentLength(content.length); > System.out.println("Content length = " + > content.length + "\n"); > response.getOutputStream().write(content); > response.getOutputStream().flush(); > > } > catch (Exception ex) { throw new ServletException(ex); } > } > > > At 17:11 05/03/02, [EMAIL PROTECTED] wrote: > >how do you set the no-cache for the output header going out > of the servlet, > >because I saw this prob just yesterday. > > > >----- Original Message ----- > >From: "Savino, Matt C" <[EMAIL PROTECTED]> > >To: <[EMAIL PROTECTED]> > >Sent: Tuesday, March 05, 2002 11:34 AM > >Subject: RE: FO -> PDF works with Netscape, not with IE > > > > > > > If you don't set any of the cache properties in the > response header > > > (returned PDF) to no-cache (or expires immediately, or whatever > >equivalent), > > > IE 5.5 is smart enough to internally return it's own > cache on the second > >hit > > > (at least in my experience). > > > > > > Matt Savino > > > > > > > > > > -----Original Message----- > > > > From: Katiyar, Bhawana [mailto:[EMAIL PROTECTED]] > > > > Sent: Tuesday, March 05, 2002 7:37 AM > > > > To: [EMAIL PROTECTED] > > > > Subject: RE: FO -> PDF works with Netscape, not with IE > > > > > > > > > > > > I am using IE 5.5 SP2. My request for a PDF document is being > > > > sent twice. > > > > Does anyone has a working servlet which serves PDF requests > > > > in one shot. > > > > > > > > Thanks > > > > Bh > > > > > > > > -----Original Message----- > > > > From: Savino, Matt C [mailto:[EMAIL PROTECTED]] > > > > Sent: Monday, March 04, 2002 5:00 PM > > > > To: '[EMAIL PROTECTED]' > > > > Subject: RE: FO -> PDF works with Netscape, not with IE > > > > > > > > > > > > If you have to support older verisons of IE (<5.5), you'll > > > > also have to take > > > > a couple of steps to avoid calling FOP 2 or 3 times. One > > > > you'll want to look > > > > out for User-Agent='contype' in the request header, and only > > > > return the > > > > content type, not the actual content. But this isn't enough > > > > (even though > > > > Microsoft says it is). IE < 5 likes to request the PDF doc, > > > > then kill the > > > > request, then request the contype, then request the doc > again. Except > > > > sometimes, and under no reproduceable set of conditions I > > > > could discern, IE > > > > accepts the whole document on the first request. Which means > > > > you can't just > > > > only call FOP and return the whole doc on the third > hit. The only full > > > > solution I've seen so far is to cache the PDF byte-array in > > > > the session > > > > after the first hit, then return it if requested on the third > > > > hit. (credit > > > > Jim Urban I believe) This doesn't save you from sending the > > > > PDF out over the > > > > wire twice, but it does save calling FOP twice. And so far > > > > the latter has > > > > proven to be much more time and resource-consuming. > I've attached the > > > > servlet I use to generate HTML and PDF. It's kind of a mess, > > > > but you should > > > > be able to find all the pieces. > > > > > > > > One note: it's possible setting the 'Content-Disposition' as > > > > described below > > > > may clear up the problem. I remember experimenting with > > > > Content-Disposition > > > > a long time ago, but I didn't like the way it brought up two > > > > consecutive > > > > 'Save As...' dialogs. > > > > > > > > Matt Savino > > > > > > > > > > > > > -----Original Message----- > > > > > From: Chetan Vig [mailto:[EMAIL PROTECTED]] > > > > > Sent: Monday, March 04, 2002 1:51 PM > > > > > To: [EMAIL PROTECTED] > > > > > Subject: Re: FO -> PDF works with Netscape, not with IE > > > > > > > > > > > > > > > Make sure you have the following set in your response > > > > > // CONTENT DISPOSITION ENSURES THAT IE > > > > > BROWSER RECOGNIZES > > > > > THE PDF > > > > > // BYTE STREAM AS A PDF FILE > > > > > // SOLUTION FOUND FROM MICROSOFT > SUPPORT PAGE > > > > > // NO IMPACT FOR NETSCAPE BROWSER > > > > > response.addHeader("Content-Disposition", > > > > > "inline;filename=report.pdf"); > > > > > response.setContentLength(contentSize); > > > > > > > > > > Chetan > > > > > > > > > > > > > > > Jim Urban wrote: > > > > > > > > > > > Be sure you set the content length, otherwise IE has > > > > > problems. It also > > > > > > helps to call reset to clear any information in the HTTP > > > > > header before > > > > > > setting your content type or any other values. > > > > > > > > > > > > Jim > > > > > > > > > > > > > -----Original Message----- > > > > > > > From: Katiyar, Bhawana > [mailto:[EMAIL PROTECTED]] > > > > > > > Sent: Monday, March 04, 2002 3:23 PM > > > > > > > To: [EMAIL PROTECTED] > > > > > > > Subject: FO -> PDF works with Netscape, not with IE > > > > > > > > > > > > > > > > > > > > > Hi! I am using version .18 to render PDF from > XML. Rendering is > > > > > > > fine with Netscape, but doesn't work with IE. > > > > > > > Any clues? > > > > > > > Thanks > > > > > > > Bhawana > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > > > > For additional commands, email: > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > > > For additional commands, email: [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > > For additional commands, email: [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > > For additional commands, email: [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, email: [EMAIL PROTECTED] > > > > > > > > >--------------------------------------------------------------------- > >To unsubscribe, e-mail: [EMAIL PROTECTED] > >For additional commands, email: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, email: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
