[erlang-questions] confusing returns from httpc:request/4

Ingela Andin <>
Wed Oct 13 11:58:09 CEST 2010


2010/10/13 Chandru <>:
> On 13 October 2010 09:53, Ingela Andin <> wrote:
>> Hi!
>>
>> The only reason that the httpc-client will return the value {error,
>> socket_closed_remotely}
>> is that the connection is prematurely  closed by the server.
>> Unfortunately  that something
>> is sent on a tcp socket does not mean it has been sent on the wire
>> yet, and depending on
>> the circumstances it is possible for the socket to be closed before
>> all data has been sent
>> so occasionally a tcp_close can come before all data is delivered.
>>
>> When you use ibrowse do you verify that you always get a correct body?
>> (compleate body) from what I can tell from the code ibrowse will on a
>> tcp_closed  message always return whatever happens to be in the buffer
>> compleate or not.
>>
>
> ibrowse does this only in the following cases:
>  * server returned a "Connection: Close"
>  * Server supports HTTP/0.9 or HTTP/1.0
>
> In all other cases, it returns an error to the caller.
>
> regards,
> Chandru
>

Well I do not know if any of these things is true in Dans senario. But
I do know that
getting the problem with a tcp close message before all data is
deliverd is a highly timing dependant problem
and if it happens in the server there is nothing inets-client or
ibrows can do about it except return an error.

Regards Ingela Erlang/OTP team - Ericsson AB


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