Re: Python CGI and Browser timeout
Sebastian Bassi wrote: On 26 Apr 2007 14:48:29 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: In order to work around this problem, I started printing empty strings (i.e. print ) so that the browser does not timeout. How do you print something while doing the query and waiting for the results? I saw some pages that display something like: This page will be updated in X seconds to show the results (X is an estimated time depending of server load), after a JS countdown, it refresh itself and show the result or another This page will be updated in X seconds to show the results. The usual way is by client pull: send the content you want the user to see, and include a Refresh: header - the easiest way is to include a META tag in the html content head section like meta http-equiv=refresh content=N; URL=other-web-address So the page can continually check whether the user's job is finished, if it isn't just sending out the same content and then when it is printing the details. regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden -- Asciimercial - Get Python in your .sig and on the web. Blog and lens holdenweb.blogspot.comsquidoo.com/pythonology tag items:del.icio.us/steve.holden/python All these services currently offer free registration! -- Thank You for Reading -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI and Browser timeout
Steve Holden wrote: Sebastian Bassi wrote: On 26 Apr 2007 14:48:29 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: In order to work around this problem, I started printing empty strings (i.e. print ) so that the browser does not timeout. How do you print something while doing the query and waiting for the results? I saw some pages that display something like: This page will be updated in X seconds to show the results (X is an estimated time depending of server load), after a JS countdown, it refresh itself and show the result or another This page will be updated in X seconds to show the results. The usual way is by client pull: send the content you want the user to see, and include a Refresh: header - the easiest way is to include a META tag in the html content head section like meta http-equiv=refresh content=N; URL=other-web-address So the page can continually check whether the user's job is finished, if it isn't just sending out the same content and then when it is printing the details. I should have pointed out that N is the number of seconds to wait before refreshing. regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden -- Asciimercial - Get Python in your .sig and on the web. Blog and lens holdenweb.blogspot.comsquidoo.com/pythonology tag items:del.icio.us/steve.holden/python All these services currently offer free registration! -- Thank You for Reading -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI and Browser timeout
En Thu, 26 Apr 2007 18:48:29 -0300, [EMAIL PROTECTED] escribió: I am creating a simple cgi script which needs to retrieve and process a huge number of records from the database (more than 11,000) and write the results to a file on disk and display some results when processing is complete. However, nothing needs to be displayed while the processing is on. I was facing browser timeout issue due to the time it takes to process these records. In order to work around this problem, I started printing empty strings (i.e. print ) so that the browser does not timeout. Is there a better solution to avoid browser timeouts? You could spawn another process or thread, reporting the progress somewhere. Then redirect to another page showing the progress (and auto-reloading itself each few seconds). When it detects that processing is complete, redirect to another page showing the final results. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI and Browser timeout
On 26 Apr 2007 14:48:29 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: In order to work around this problem, I started printing empty strings (i.e. print ) so that the browser does not timeout. How do you print something while doing the query and waiting for the results? I saw some pages that display something like: This page will be updated in X seconds to show the results (X is an estimated time depending of server load), after a JS countdown, it refresh itself and show the result or another This page will be updated in X seconds to show the results. -- Sebastián Bassi (セバスティアン) Diplomado en Ciencia y Tecnología. GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D Club de la razón (www.clubdelarazon.org) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI and Browser timeout
On 26 Apr 2007 14:48:29 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Is there a better solution to avoid browser timeouts? Raising timeout in Apache, by default is 300 seconds. Limiting jobs size (both in the html form and from script size since you should not trust on client validations). -- Sebastián Bassi (セバスティアン) Diplomado en Ciencia y Tecnología. GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D Club de la razón (www.clubdelarazon.org) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python CGI and Browser timeout
Thanks for the response. To further clarify the details: I am printing the empty strings in a for loop. So the processing happens in a loop when all the results from the query have been already retrieved and each record is now being processed inside the loop. I also update the display periodically with the total number of records processed(which is approximately after every 1/5th chunk of the total number of records in the result). Thanks, Salil Kulkarni On Apr 26, 6:01 pm, Sebastian Bassi [EMAIL PROTECTED] wrote: On 26 Apr 2007 14:48:29 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: In order to work around this problem, I started printing empty strings (i.e. print ) so that the browser does not timeout. How do you print something while doing the query and waiting for the results? I saw some pages that display something like: This page will be updated in X seconds to show the results (X is an estimated time depending of server load), after a JS countdown, it refresh itself and show the result or another This page will be updated in X seconds to show the results. -- Sebastián Bassi (セバスティアン) Diplomado en Ciencia y Tecnología. GPG Fingerprint: 9470 0980 620D ABFC BE63 A4A4 A3DE C97D 8422 D43D Club de la razón (www.clubdelarazon.org) -- http://mail.python.org/mailman/listinfo/python-list
