Re: [hybi] Reliable message delivery (was Re: Technical feedback.)
Jamie Lokier <jamie@shareable.org> Wed, 03 February 2010 00:56 UTC
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Date: Wed, 03 Feb 2010 00:56:50 +0000
From: Jamie Lokier <jamie@shareable.org>
To: Ian Hickson <ian@hixie.ch>
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References: <5c902b9e1001292333k79569316lf371938c9aa766@mail.gmail.com> <128BFD31-9835-47B1-B7A9-F20F5CDA8D8C@apple.com> <20100130144936.GD19124@shareable.org> <5c902b9e1001301552n6efb7969o34110373e3ab4945@mail.gmail.com> <4B672C9D.9010205@ericsson.com> <op.u7gy9bag64w2qv@annevk-t60> <96935605-E8B8-4718-B60F-570FD2C199E4@apple.com> <Pine.LNX.4.64.1002012354380.3846@ps20323.dreamhostps.com> <F21A8D9A-1E27-48C8-8818-0BB6872A2CE4@apple.com> <Pine.LNX.4.64.1002020056460.21600@ps20323.dreamhostps.com>
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Cc: Hybi <hybi@ietf.org>
Subject: Re: [hybi] Reliable message delivery (was Re: Technical feedback.)
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Ian Hickson wrote: > On Mon, 1 Feb 2010, Maciej Stachowiak wrote: > > On Feb 1, 2010, at 4:00 PM, Ian Hickson wrote: > > > > > > On the client side, I agree in principle (at least to ensure that no > > > client-to-server data is lost in a case where the API is used to send > > > frames then immediately close the connection). However, what if the > > > server never closes its side of the connection, even after the client > > > initiates a close? Should we have some sort of timeout? > > > > > > On the server side, I don't think there's any point _requiring_ that > > > the server close gracefully. If the server really doesn't care if data > > > it just sent is received, e.g. because it knows the client side has > > > already GC'ed its WebSocket object, then it should just be able to > > > close abruptly. > > > > How can the server possibly know that the client has already GC'd its > > WebSocket object, if the server and not the client is the initiator of > > the close? (If the client initiates the close, then at least in my > > proposal there's no extra work for the server.) > > The server and the client are typically written by the same person. If the > client sends a message in the subprotocol saying "ok after this I'm > throwing away all references to the object", then the server can know that > there's no point sending further data. Isn't that the same as a close message with the same semantics? -- Jamie
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