tnx alot but actually my scenario dose not deal with user so I thing cookies do not help a lot suppose there are 3 airline counter which fill ticket forms and send them to the cashier maybe simultaneously .forms are sent to the cashier which is just a function in my view ,,I want to know how I can handle these simultaneous request ..I also should be concern about power failure ( actually It is important not to miss queued request if there is any queue )
On Feb 19, 7:29 pm, Dennis Lee Bieber <wlfr...@ix.netcom.com> wrote: > On Sun, 19 Feb 2012 06:27:19 -0800 (PST), "rafiee.nima" > > <rafiee.n...@gmail.com> wrote: > >hi > >I want to develop a VIEW for cashier system which my receives multiple > >parallel form as request from deferent clients > >I want to know how can I handle these request ...is there any thing > >like queue in django > > The first thing you need to understand is that HTML is stateless; by > itself it has no knowledge or history of other activity -- not even for > a single user, much less multiple users. Everything a server receives > from a client is a new activity. > > This is why browser "cookies" were invented. On the first connection > a cookie is generated to identify the user-session and passed to the > browser; all related connections have to return the cookie in order to > identify which session this post applies to. The cookie may be used to > retrieve transient information from a database (this is how the history > of previous posts is maintained). > > Since going back to the server for minor updates may be so costly, > one may find lots of JavaScript in a page -- to handle collection and > verification of data on a form, and only sending a complete transaction > back to the server at the end. Or one advances into AJAX processing > which may be able to bypass the webserver itself for some stuff; this > way the session/user information stays on the client browser while the > JavaScript goes around the webserver [the "asynchronous" part of AJAX]. > -- > Wulfraed Dennis Lee Bieber AF6VN > wlfr...@ix.netcom.com HTTP://wlfraed.home.netcom.com/ -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
