Re: [hybi] Max frame size
Francis Brosnan Blazquez <francis@aspl.es> Wed, 22 June 2011 15:35 UTC
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From: Francis Brosnan Blazquez <francis@aspl.es>
To: Willy Tarreau <w@1wt.eu>
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References: <1308720860.5393.18.camel@tot.local> <20110622060514.GF18843@1wt.eu> <1308738811.11941.704.camel@vulcan.aspl.local> <20110622122521.GA22198@1wt.eu>
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Date: Wed, 22 Jun 2011 17:35:13 +0200
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Subject: Re: [hybi] Max frame size
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Hi Willy, > But why would it strip the frame header ? It should simply pass the frame > header and stream the data. I'm trying to figure how the use case for this would be. So, if the frame received is less than 127 or 65535 bytes the server reads everything, checks header correctness and that the header represents bits advised, etc, and then pass the data through a handler to the user level code...but if the data is bigger, you pass a file descriptor?? > The server should proceed exactly as it would proceed if receiving a large > POST. All file transfer applications which support large POSTs (webmails > etc...) don't buffer everything, they pass it as a stream. Do you imagine > if the server had to buffer a DVD image or something like this before passing > it to the application ? I see your example but this is not the same. In the POST case you have a single app handling its data (HTTP). In the websocket case you have a webserver + an application level code that implements an application protocol that is unknown to the webserver so it is not a nice pattern to just pass a file descriptor to the app level... > I don't see the difference with frames. You can call the application saying > "hey, here come 5 GB of data, please read them from this connection handle". Ok, the way it should be done, assuming we have a message/frame oriented protocol, is that the app level register a handler which is called every time a single frame is received. This way, the handler is called, for example, each 4k, so the handler can receive those 5GB with minimum memory allocation and with the security it handles messages not raw access to a file descriptor (with the security and code complexity implications it has). > Regards, > Willy > -- Francis Brosnan Blázquez <francis.brosnan@aspl.es> ASPL 91 134 14 22 - 91 134 14 45 - 91 116 07 57 AVISO LEGAL Este mensaje se dirige exclusivamente a su destinatario. Los datos incluidos en el presente correo son confidenciales y sometidos a secreto profesional, se prohíbe divulgarlos, en virtud de las leyes vigentes. Si usted no lo es y lo ha recibido por error o tiene conocimiento del mismo por cualquier motivo, le rogamos que nos lo comunique por este medio y proceda a destruirlo o borrarlo. En virtud de lo dispuesto en la Ley Orgánica 15/1999, de 13 de diciembre, de Protección de Datos de Carácter Personal, le informamos de que sus datos de carácter personal, recogidos de fuentes accesibles al público o datos que usted nos ha facilitado previamente, proceden de bases de datos propiedad de Advanced Software Production Line, S.L. (ASPL). No obstante, usted puede ejercitar sus derechos de acceso, rectificación, cancelación y oposición dispuestos en la mencionada Ley Orgánica, notificándolo por escrito a: ASPL - Protección Datos, C/Antonio Suárez 10 A-102, 28802, Alcalá de Henares (Madrid).
- [hybi] Max frame size Francis Brosnan Blázquez
- Re: [hybi] Max frame size Willy Tarreau
- Re: [hybi] Max frame size Norio Kobota
- Re: [hybi] Max frame size Ian Fette (イアンフェッティ)
- Re: [hybi] Max frame size Francis Brosnan Blazquez
- Re: [hybi] Max frame size Francis Brosnan Blazquez
- Re: [hybi] Max frame size Ian Fette (イアンフェッティ)
- Re: [hybi] Max frame size Francis Brosnan Blazquez
- Re: [hybi] Max frame size Francis Brosnan Blazquez
- Re: [hybi] Max frame size Arman Djusupov
- Re: [hybi] Max frame size Willy Tarreau
- Re: [hybi] Max frame size Francis Brosnan Blazquez
- Re: [hybi] Max frame size Andy Green (林安廸)
- Re: [hybi] Max frame size Scott Ferguson
- Re: [hybi] Max frame size Iñaki Baz Castillo
- Re: [hybi] Max frame size Francis Brosnan Blázquez
- Re: [hybi] Max frame size Andy Green (林安廸)
- Re: [hybi] Max frame size Brodie Thiesfield
- Re: [hybi] Max frame size Scott Ferguson