BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  streaming a object?          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Tony Caduto Guest Posted: Wed Jan 21, 2004 11:23 pm    Post subject: streaming a object? Is it possible to stream a tobject with Indy? If so does anyone have a example? Thanks, -- Tony Back to top Chad Z. Hower aka Kudzu Guest Posted: Wed Jan 21, 2004 11:48 pm    Post subject: Re: streaming a object? "Tony Caduto" <acaduto (AT) amsoftwaredesign (DOT) com> wrote in news:400f09e2$1 @newsgroups.borland.com: Quote: Is it possible to stream a tobject with Indy? If so does anyone have a example? Just use Delphi's streamning fucntions which stream to text, then write it accross to Indy. -- Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/ "Programming is an art form that fights back" Want more Indy stuff? Try the Atozed Indy Portal at http://www.atozedsoftware.com/ * More Free Demos * Free Articles * Extra Support ELKNews - Get your free copy at http://www.atozedsoftware.com Back to top Eugene Mayevski [SecureBl Guest Posted: Thu Jan 22, 2004 12:54 am    Post subject: Re: streaming a object? Chad Z. Hower aka Kudzu wrote: Quote: Is it possible to stream a tobject with Indy? If so does anyone have a example? Just use Delphi's streamning fucntions which stream to text, then write it accross to Indy. Delphi streaming works only with TPersistent (this is what TPersistent is for). If one wants to stream something else, he needs to write his own serialization mechanism. Not very hard, I think, but only for TPersistent. For TObject it might be harder. -- Eugene Mayevski EldoS Corp., CTO Security and networking solutions http://www.eldos.com Back to top Dennis Landi Guest Posted: Thu Jan 22, 2004 3:21 am    Post subject: Re: streaming a object? "Eugene Mayevski [SecureBlackbox]" <mayevski (AT) eldos (DOT) org> wrote Quote: Chad Z. Hower aka Kudzu wrote: Is it possible to stream a tobject with Indy? If so does anyone have a example? Just use Delphi's streamning fucntions which stream to text, then write it accross to Indy. Delphi streaming works only with TPersistent (this is what TPersistent is for). If one wants to stream something else, he needs to write his own serialization mechanism. Not very hard, I think, but only for TPersistent. For TObject it might be harder. Tony, I'd recommend going the RTTI route and only pack/unpacking the properties you need. I believe http://www.bigattichouse.com has a freeware RTTI to XML to RTTI component that you can examine to see how its done.... As Eugene points, out tPersistent has ready made has RTTI facilities to do this. The TypInfo.pas unit is pretty easy to read.... -d Back to top Tony Caduto Guest Posted: Thu Jan 22, 2004 3:36 pm    Post subject: Re: streaming a object? I have to go through all that to stream a simple tobject? why can't I just do a writebuffer(myobject, sizeof(myobject)) isn't a object just a junk of memory? -- Tony Caduto AM Software Design Inexpensive Corporate Instant Messaging http://www.amsoftwaredesign.com "Dennis Landi" <none[at]none.com> wrote Quote: "Eugene Mayevski [SecureBlackbox]" <mayevski (AT) eldos (DOT) org> wrote in message news:400f1f6f (AT) newsgroups (DOT) borland.com... Chad Z. Hower aka Kudzu wrote: Is it possible to stream a tobject with Indy? If so does anyone have a example? Just use Delphi's streamning fucntions which stream to text, then write it accross to Indy. Delphi streaming works only with TPersistent (this is what TPersistent is for). If one wants to stream something else, he needs to write his own serialization mechanism. Not very hard, I think, but only for TPersistent. For TObject it might be harder. Tony, I'd recommend going the RTTI route and only pack/unpacking the properties you need. I believe http://www.bigattichouse.com has a freeware RTTI to XML to RTTI component that you can examine to see how its done.... As Eugene points, out tPersistent has ready made has RTTI facilities to do this. The TypInfo.pas unit is pretty easy to read.... -d Back to top Chad Z. Hower aka Kudzu Guest Posted: Thu Jan 22, 2004 4:21 pm    Post subject: Re: streaming a object? "Tony Caduto" <acaduto (AT) amsoftwaredesign (DOT) com> wrote in news:400fee05$1 @newsgroups.borland.com: Quote: I have to go through all that to stream a simple tobject? If its from TPersistent or down just use the built in streaming, its really easy. Quote: why can't I just do a writebuffer(myobject, sizeof(myobject)) isn't a object just a junk of memory? Yes, with local references and even out of object references that wont make any sense. Also you'll get just the pointer with the above. :) -- Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/ "Programming is an art form that fights back" Need extra help with an Indy problem? http://www.atozed.com/indy/experts/support.html ELKNews - Get your free copy at http://www.atozedsoftware.com Back to top Remy Lebeau (TeamB) Guest Posted: Thu Jan 22, 2004 8:18 pm    Post subject: Re: streaming a object? "Tony Caduto" <acaduto (AT) amsoftwaredesign (DOT) com> wrote Quote: I have to go through all that to stream a simple tobject? Yes. Quote: why can't I just do a writebuffer(myobject, sizeof(myobject)) That wouldn't work if the object contained pointers or other dynamic content. Quote: isn't a object just a junk of memory? It is more involved than that. 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