BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Suspend Mode          BorlandTalk.com Forum Index -> Delphi Internet Winsock View previous topic :: View next topic   Author Message Osman AKDEMÝR Guest Posted: Sat Apr 24, 2004 9:26 am    Post subject: Suspend Mode Hi everybody, I have an application that's TCP client/Server. Everything is fine but there is a problem. If I wait long time for ex 2-3 hour without doing anything (not sending any data between client-server) and after that If I try to send any data to server which I connected I coludn't send my data or I colundt get any data. And I jump time out while reading data from server... Actually I wanted to ask a question is there a suspend mode (or like this) in socket programming or winsock or inside the indy component? Please help me because it's very important.... Thanks for all.... Back to top Martin James Guest Posted: Sat Apr 24, 2004 9:41 am    Post subject: Re: Suspend Mode "Osman AKDEMÝR" <osman.akdemir (AT) partneronline (DOT) org> wrote Quote: Hi everybody, I have an application that's TCP client/Server. Everything is fine but there is a problem. If I wait long time for ex 2-3 hour without doing anything (not sending any data between client-server) and after that If I try to send any data to server which I connected I coludn't send my data or I colundt get any data. And I jump time out while reading data from server... Actually I wanted to ask a question is there a suspend mode (or like this) in socket programming or winsock or inside the indy component? No 'suspend mode' is required. TCP will, by default, keep connections open for ever. If the connection is closing at one end, it is because you, or possibly some proxy router, is timing it out somewhere & closing the connection. Put some debug/breakpoints in to find out which end is disconnecting & fix the problem. Initially, run the server & client on the same box so there are no network switches or proxies in the way. Rgds, Martin Back to top Ben Hochstrasser Guest Posted: Sat Apr 24, 2004 12:00 pm    Post subject: Re: Suspend Mode Martin James wrote: Quote: TCP will, by default, keep connections open for ever. If the connection is closing at one end, it is because you, or possibly some proxy router, is timing it out somewhere & closing the connection. Many servers (ftp being a typical example) will close connections that were idle for more than x minutes. Sometimes even the underlying TCP/IP stack will do this in order to "housekeep" the system. You may want to send a heartbeat packet every couple of minutes to keep the connection alive. -- Ben Back to top Milan Guest Posted: Wed May 12, 2004 1:08 pm    Post subject: Re: Suspend Mode Yes, Indy has implemented timeout. There's your problem. But it's much better if you disconnect and connect again after those 2-3 hours. Set timeout to something like a couple of minutes and connect if disconnected when sending data. Quote: this) in socket programming or winsock or inside the indy component? 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