Its Always nice to say what the solution is that you found ;) -----Original Message----- From: Yuval Gross [mailto:[EMAIL PROTECTED]] Sent: 04 June 2002 04:48 PM To: [EMAIL PROTECTED] Subject: Re: [DOTNET] a c#/client/server/remoting design problem
i've found a solution. thanx anyway. Peter Laan <[EMAIL PROTECTED]> wrote: Lets see if I understand your problem. You are conserned that the person who writes the client might accidentaly code it wrong and create a writable document when it shouldn't. Correct? I was about to suggest that the server created a derived class, but I just saw that you had already tried that. I did this (but for other reasons) in my project, but my object is marshaled by reference. So now I'm out of ideas. Peter From: "Yuval Gross" > thanx for the reply > > after modifying the doc, the client sends it to the server for processing > (updating it in the DB etc.) > > the problem isn't that the client will try to hack my code (the client for > that matter are 3 (nice) guys sitting in a cubicle next to mine, and they > have access to the vss... :) ). > it's a matter of creating a robust design that will prevent ppl from doing > any unintentional damage. > > i guess i could find a way for the server to identify docs that > were 'illegaly' made writable by the client and refuse it, but i'm looking > for a cleaner way in which the client cannot do any damage. > > the problem with the factory pattern is that in order for it to > be 'exclusive' in its ability to create the doc, we need the doc's ctor to > be internal, and the factory to be in the same assembly. once we do that, > since the client has access to that assembly, it can create the factory > itself (now all we've got to do is design a class that creates the factory > that only the server can call. it's the exact same problem - we're back to > square 1...) > > You can read messages from the DOTNET archive, unsubscribe from DOTNET, or > subscribe to other DevelopMentor lists at http://discuss.develop.com. You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com. --------------------------------- Do You Yahoo!? Sign-up for Video Highlights of 2002 FIFA World Cup You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com. You can read messages from the DOTNET archive, unsubscribe from DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
