As an alternative to polling the client, as Ryan describes, you could consider piggy-backing the status updates on the back of other ajax responses. Which way you go depends entirely on the nature of your app, in particular:
1. how frequently it generates ajax traffic anyway 2. how long the server-side process is going to take If the server-side process takes, say, 20 seconds, polling is a good choice. If it'll take half an hour, piggy-backing is not going to hammer your server anything like as much. The X-JSON header in Prototype, combined with Ajax.Responders, makes an excellent infrastructure for the piggy-backing approach. Dave On Thursday 15 February 2007 18:03, Ryan Gahl wrote: > Short of using comet (google for "cometd" for an explanation), this is a > manual type of thing... > > 1. Initial request goes to server, server responds "starting step 1" > 2. Client gets message, immediately sends another request to server, server > responds "still in step 1, dude, chill out..." > 3. Client gets message, repeats calls until server says "alright already, > I'm done, here's your damn data" > > and you show nice message for each cycle... you can also implement a > progress bar if you want. But the bottom line is, with standard AJAX, you > need to program it yourself. > > On 2/15/07, Neil Ravo (Manhatten Project) <[EMAIL PROTECTED]> wrote: > > Hi, > > > > More a pure Ajax question that SAU, but is there a way you can > > increment status messages back to the client when calling a long > > running request? i.e. if I have a request which calls a remote page, > > which in turn sends back a message after each function has completed > > can you incrementally tell the client that "function 1 has > > finished" (while the system has moved on to step 2), "function 2 has > > finished" etc. I know I can send back simple messages on a page > > complete via standard Ajax status calls but I was wondering if it was > > possible using headers or some other mechanism to incrementally tell > > the client what is going on. > > > > Cheers > > > > Neil ------------------------------------------------------- -- ---------------------- Author Ajax in Action http://manning.com/crane Ajax in Practice http://manning.com/crane2 Prototype & Scriptaculous Quickly http://manning.com/crane3 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Spinoffs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/rubyonrails-spinoffs?hl=en -~----------~----~----~----~------~----~------~--~---
