I understand the PRG pattern. I don't see how it is relevant to the Action vs. DispatchAction point.
Perhaps I'm just being dense... I am reviewing 3 gigs of server logs today and my eyes feel like they are about to explode, and my brain is about to turn to mush, moreso than usual I mean ;) -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com On Thu, July 7, 2005 2:17 pm, Michael Jouravlev said: > This is exactly what I mean. If you recall the definition, Location !URL. > Instead, Location == URL + request params. > > Most browsers build up page history using locations, of the browsers > known to me, only Opera uses actual responses. That means, that if you > load the same page five times in Opera, it will put five entries into > page history. But most other browsers do not do that, they put only > one entry in page history, because all pages has the same location. > > Another trick is using redirection. Browsers "forget" location, which > preceds redirected request. If you redirect from each POST to result > page, result page is loaded with GET, this is how browsers work. Say, > you submit the same form three times, you have the following request > sequence: POST->GET->POST->GET->POST->GET, right? Three pairs of > POST->GET What goes to the page history? The answer is, that requests > preceding redirected request do not go, so it would be GET->GET->GET. > This is what sucky Opera is doing. They explain this by 13.13 chapter > of HTTP1.1 spec. Whatever. Other browsers do not do that, and also > consider themselves compliant to HTTP spec. > > So, other browsers see that all GET in the GET->GET->GET point to the > same location (see definition above). So, they just throw all of them > but one, because they consider it the same resource. Now you get your > page history: ->GET-> That is all! > > Now, combine that with non-cachable pages, and you can serve different > content from the same locaiton, which is stored in the same history > slot. This is how you get your single-page application or what I call > it, a "web island". You cannot go Back, because there is nowhere to go > back, and your page is always in sync with the server. > > This is what DialogAction does, besides other things ;-)) > > I think I need to put "web island" chapter back into my article on JSP > controls... > > Michael. > > On 7/7/05, Frank W. Zammetti <[EMAIL PROTECTED]> wrote: >> I don't understand your argument Michael. Can you expand and/or >> clarify? >> Specifically, how is multiple Actions not serving from the same >> location? >> It's not the same URL, granted, is that what you meant? >> >> -- >> Frank W. Zammetti >> Founder and Chief Software Architect >> Omnytex Technologies >> http://www.omnytex.com >> >> On Thu, July 7, 2005 1:44 pm, Michael Jouravlev said: >> > On 7/7/05, Frank W. Zammetti <[EMAIL PROTECTED]> wrote: >> >> (For any newbies reading this, the difference that matters is that >> with >> >> a >> >> DispatchAction, you have a single entry in struts-config, but you >> have >> >> to >> >> pass a parameter with each request. With plain Actions, you would >> have >> >> multiple mappings like /setupForAdd, /setupForEdit, /add, /delete and >> so >> >> on in this case, but no parameter to pass around. There are pluses >> and >> >> minuses to each approach, but they get you to the same basic place in >> >> the >> >> end.) >> > >> > Not really, unless you use mod_rewrite. Using single action allows you >> > to serve all pages from one location, which, combined with redirect, >> > usually makes a nice user experience. Most browsers put only one entry >> > in the page history because the location is always the same for all >> > response pages. >> > >> > Michael. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
