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How does a web server handle a lost connection, for example the client sends a request and due to some problem got disconnected from the server before the latter could reply with a response, what does a typical web server do in these kind of scenarios

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closed as not a real question by Michael Hampton, pauska, Chris S May 23 '13 at 17:03

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Browsers make requests. Web servers reply to requests. They neither know nor care what happens once that reply has been sent. Think of it like the UDP protocol.

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I'm asking what happens when the browser that made the request is no longer available to listen to that request, will the server still reply ? –  Vamsi Krishna Sep 6 '12 at 9:39
    
@Vamsi, I really thought I was clear on that. When a web server receives a request from a browser it sends a response. That's all that happens. The web server cannot even know if that browser is still listening or not, let alone care about it. There are some application methods used to maintain a psuedo connection but the web server is not directly involved in that. It listens and it replies. It does nothing else. It's like light leaving a torch/flashlight. It goes out but the source knows nothing about it from that point onwards. –  John Gardeniers Sep 6 '12 at 9:44
    
"The web server cannot even know if that browser is still listening or not, let alone care about it." - it does know and care about it, and will terminate that connection (= won't try to send more and it will free resources, etc). –  Karoly Horvath Sep 6 '12 at 10:38
    
@yi_H, I think you're confusing the web server level with the application level. –  John Gardeniers Sep 6 '12 at 23:10
    
@John Gardeniers: let's assume I'm requesting a 1G file download from the webserver, and then I disconnect.. what do you think will happen? –  Karoly Horvath Sep 7 '12 at 8:24

It doesn't do anything. What's it supposed to do? The connection is gone.

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I mean will it still reply ? –  Vamsi Krishna Sep 6 '12 at 9:37
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If the TCP connection is gone, how is it going to reply? –  ThatGraemeGuy Sep 6 '12 at 14:21

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