Re: Please wait Handler
Thanks for all your help guys, Will have a think about it, Marty - Original Message - From: Randal L. Schwartz [EMAIL PROTECTED] To: Perrin Harkins [EMAIL PROTECTED] Cc: Andrew Ho [EMAIL PROTECTED]; Martin Moss [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Sunday, February 16, 2003 7:43 AM Subject: Re: Please wait Handler Perrin == Perrin Harkins [EMAIL PROTECTED] writes: Perrin Andrew Ho wrote: Make an HTML page which does a form submit to pleasewait.pl. pleasewait.pl just displays an HTML page with an animated please wait image on it, and its headers include the following header: Refresh: 1; url=http://www.example.com/getresults.pl?args... Perrin That's what Randal does in the article that I posted (although his Perrin puts it in a META tag). It's called client pull, and was introduced Perrin by Netscape at the same time as server push. There's a later better example of that (self-cleaning, etc) at http://www.stonehenge.com/merlyn/LinuxMag/col39.html. I usually don't recycle ideas unless I can put a new slant on it. Check out the new slant. :) -- Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 [EMAIL PROTECTED] URL:http://www.stonehenge.com/merlyn/ Perl/Unix/security consulting, Technical writing, Comedy, etc. etc. See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!
Re: Please wait Handler
Perrin == Perrin Harkins [EMAIL PROTECTED] writes: Perrin Andrew Ho wrote: Make an HTML page which does a form submit to pleasewait.pl. pleasewait.pl just displays an HTML page with an animated please wait image on it, and its headers include the following header: Refresh: 1; url=http://www.example.com/getresults.pl?args... Perrin That's what Randal does in the article that I posted (although his Perrin puts it in a META tag). It's called client pull, and was introduced Perrin by Netscape at the same time as server push. There's a later better example of that (self-cleaning, etc) at http://www.stonehenge.com/merlyn/LinuxMag/col39.html. I usually don't recycle ideas unless I can put a new slant on it. Check out the new slant. :) -- Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095 [EMAIL PROTECTED] URL:http://www.stonehenge.com/merlyn/ Perl/Unix/security consulting, Technical writing, Comedy, etc. etc. See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!
Please wait Handler
All, I was wondering if it is possible to Create a Handler that points a user at a page with an animated gif saying something like "Please wait", and then when my other handlers have finisheddisplay the page results I want from my mod perl handlers. I guess in a nutshell I'm wondering if there is a way to send HTML headers to a browser which tells it to scrap the html it has already received and display the new HTML I am passing it. If this isn't possible, can somebody point me in the direction of a 'please wait' mechanism that is possible - Is there one? Kind regards Marty
Re: Please wait Handler
-BEGIN PGP SIGNED MESSAGE- Hash: MD5 Hi Martin, On Friday, February 14, 2003 at 2:24:49 PM, you wrote: MM I was wondering if it is possible to Create a Handler that points a user at a page with an animated gif saying something like Please wait, and then when my other handlers have finished display MM the page results I want from my mod perl handlers. MM I guess in a nutshell I'm wondering if there is a way to send HTML headers to a browser which tells it to scrap the html it has already received and display the new HTML I am passing it. MM If this isn't possible, can somebody point me in the direction of a 'please wait' mechanism that is possible - Is there one? I don't know about the handlers, but I've never read of an HTTP header to do as you ask. What I do, good or not I don't know, is send the Please Wait message as a load of HTML 'div' elements with their 'display' CSS attribute set to 'hidden'. As my program works, it sends at regular intervals little bits of JavaScript to tell the client to display another DIV. This has the effect of a progress bar incrementing. When I do not know how much I have to do, I have the progress bar reverse itself once full. When the program is ready to move on, it sends some JS to redirect the client to the next URI. I've found that animated GIFs don't work in this situation since the IE client I work with needs to get the whole document before it will look for elements linked to from that document - including images and stylesheets. Hope this helps. - -- Cheers Leemailto:[EMAIL PROTECTED] $$=qw$808273788400074285838400657879847269820080698276007265677569820727$; $$=~s$(\d\d)$\$_.=chr(\$1+32)$ge;eval; -BEGIN PGP SIGNATURE- Version: 2.6 iQCVAwUAPkzzA6drfekeF/QBAQFgQwP/Sm/840HI2pD+I4jhRqoqino2P1+Cza56 OI9aA8UYutvreXkWaoaSrmGEiPMDuaLhcOHi1fAgDCZ8k33VPrhVlgZyHz97LqAG pwrS0/cOPW+55SFQjw9RmmyIc9i6b4TPGOPury0RbaHbO+RIH23Dsag4Si5uEHuX SncVZ6Adz50= =I26o -END PGP SIGNATURE-
Re: Please wait Handler
Martin Moss wrote: I was wondering if it is possible to Create a Handler that points a user at a page with an animated gif saying something like Please wait, and then when my other handlers have finished display the page results I want from my mod perl handlers. The classic answer to this problem is described by Randal in one of his Web Techniques columns: http://www.stonehenge.com/merlyn/WebTechniques/col20.html You can also try server push (with the Content-type: multipart/x-mixed-replace header), but I'm not sure how consistently today's browsers implement that. - Perrin
Re: Please wait Handler
On Fri, Feb 14, 2003 at 11:08:48AM -0500, Perrin Harkins wrote: Martin Moss wrote: I was wondering if it is possible to Create a Handler that points a user at a page with an animated gif saying something like Please wait, and then when my other handlers have finished display the page results I want from my mod perl handlers. The classic answer to this problem is described by Randal in one of his Web Techniques columns: http://www.stonehenge.com/merlyn/WebTechniques/col20.html You can also try server push (with the Content-type: multipart/x-mixed-replace header), but I'm not sure how consistently today's browsers implement that. I know bugzilla does just that (Please wait message when a query is performed), and it works on my Netscape 4.7, Mozilla, and IE browsers. I think it is a much better solution than that given by Randal. - Dmitri.
Re[2]: Please wait Handler
-BEGIN PGP SIGNED MESSAGE- Hash: MD5 Hi Dmitri, On Friday, February 14, 2003 at 6:11:01 PM, you wrote: You can also try server push (with the Content-type: multipart/x-mixed-replace header), but I'm not sure how consistently today's browsers implement that. DT I know bugzilla does just that (Please wait message when a query is DT performed), and it works on my Netscape 4.7, Mozilla, and IE browsers. DT I think it is a much better solution than that given by Randal. Have you got a URI to that, please? Last time I push with IE I gave up unsatisfied, but now I feel optimistic :) - -- Cheers Leemailto:[EMAIL PROTECTED] $$=qw$808273788400074285838400657879847269820080698276007265677569820727$; $$=~s$(\d\d)$\$_.=chr(\$1+32)$ge;eval; -BEGIN PGP SIGNATURE- Version: 2.6 iQCVAwUAPk1FoKdrfekeF/QBAQHifQP+OfKIuPHGuBlN/Sh/mo6NYEb1mkUliEAk mi7Opyvhy2dhP5ytZG6bftJxGkjSQinIW+gErA8I5KYRqxLN0gYSOoWngjRc/wwK o6iVi/AQQn/+itDsJeAXScGpyFBq3uhipr7q7hFUZr5kUNdXP+k74KJlk9GNL4Rn tPqzWvvKliY= =ldST -END PGP SIGNATURE-
Re: Please wait Handler
On Fri, Feb 14, 2003 at 08:38:08PM +0100, Lee Goddard wrote: Have you got a URI to that, please? Last time I push with IE I gave up unsatisfied, but now I feel optimistic :) I don't have _the_ way for you to do it, but one live example is Apache's bug database: http://nagoya.apache.org/bugzilla/index.html. Run some queries and capture packets and see how it works. - Dmitri.
Re: Please wait Handler
Hello, MMI guess in a nutshell I'm wondering if there is a way to send HTML MMheaders to a browser which tells it to scrap the html it has already MMreceived and display the new HTML I am passing it. MM MMIf this isn't possible, can somebody point me in the direction of a MM'please wait' mechanism that is possible - Is there one? If the long-running process will finish within the usual amount of time that a browser waits before timing out, this is easy--use an HTTP Refresh header. For example: Long running operation is http://www.example.com/getresults.pl Please wait page is at http://www.example.com/pleasewait.pl Make an HTML page which does a form submit to pleasewait.pl. pleasewait.pl just displays an HTML page with an animated please wait image on it, and its headers include the following header: Refresh: 1; url=http://www.example.com/getresults.pl?args... The browser displays the HTML on that page, and then a second later (the 1 in the Refresh header, it could be longer), the browser fetches the second page. Since the HTML and animated image are already loaded, the user sees that while waiting for the second page to load. If the process runs a very long time, you are safer writing getresults.pl (in this example) to be able to kick off a long-running job in the background, and just display the status of the job. You can snarf a Refresh header in that too so that users see it constantly updated. Humbly, Andrew -- Andrew Ho http://www.tellme.com/ [EMAIL PROTECTED] Engineer [EMAIL PROTECTED] Voice 650-930-9062 Tellme Networks, Inc. 1-800-555-TELLFax 650-930-9101 --
Re: Please wait Handler
Andrew Ho wrote: Make an HTML page which does a form submit to pleasewait.pl. pleasewait.pl just displays an HTML page with an animated please wait image on it, and its headers include the following header: Refresh: 1; url=http://www.example.com/getresults.pl?args... That's what Randal does in the article that I posted (although his puts it in a META tag). It's called client pull, and was introduced by Netscape at the same time as server push. - Perrin
Re: Please wait Handler
Last time I experimented with Server-Push, the only browser that implemented it was Netscape 4.*. Mozilla didn't and IE didn't. Which is a pity cos it's a really useful technique. Perrin Harkins wrote: Martin Moss wrote: I was wondering if it is possible to Create a Handler that points a user at a page with an animated gif saying something like Please wait, and then when my other handlers have finished display the page results I want from my mod perl handlers. The classic answer to this problem is described by Randal in one of his Web Techniques columns: http://www.stonehenge.com/merlyn/WebTechniques/col20.html You can also try server push (with the Content-type: multipart/x-mixed-replace header), but I'm not sure how consistently today's browsers implement that. - Perrin
