Excellent, thanks. Ollie
Seth Hodgson wrote: > > Flash Player and AIR send AMF requests in the body of HTTP POST requests. > The POST method (http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html - > section 9.5) is technically not cacheable by HTTP components (proxies, > browsers, etc.) unless the AMF endpoint explicitly enables this by setting > necessary HTTP response headers to allow caching. I think in general, AMF > endpoints do the opposite and set response headers to explicitly disallow > caching to deal with old buggy proxies that cache things they shouldn't. > > Because your Flex app is running in a stateful client, the need for > caching along the network path is reduced. Your app can hang onto data > from the server as long as you think is prudent, and it can fetch more or > refresh existing data as needed. Traditional web apps on the other hand > often end up triggering many "duplicate" requests as the user navigates > forward and back through pages, so caching along the network path is > essential to protect your servers from inadvertent DoS attacks :) > > Best, > Seth > > From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On > Behalf Of Mike Oliver > Sent: Sunday, January 11, 2009 4:26 PM > To: flexcoders@yahoogroups.com > Subject: [flexcoders] Server Side Cache and AMF > > > What are the pros and cons to using a serverside cache or proxy cache with > Flex and AMF? > > I can see a cache on a web service that is primarily a lookup service, but > don't see much if any benefit to a cache related to transactions, and for > lookup, except for really large data sets I think a client side > actionscript > object will be every bit as effective, and for really large data sets you > don't want to fetch more than you need anyway so a cache won't do much > there > either. > > I think server side cache is best for pages of information like HTML > pages, > XML documents, JSP pages where the content is keyed in the cache by the > URL > for the GET, and anything else is a waste of effort or worse due to stale > data in the cache. > > But what do I know? If I knew everything I wouldn't ask. > > -- View this message in context: http://www.nabble.com/Server-Side-Cache-and-AMF-tp21406354p21844883.html Sent from the FlexCoders mailing list archive at Nabble.com.
