Re: [squid-users] Proxy-Connection: Keep-Alive in POST Requests?

On 08/09/10 17:46, Mikio Kishi wrote:
> Hi, Henrik
>
>> fre 2007-04-13 klockan 22:25 +0200 skrev Sebastian Weber:
>>> Hendrik, thank you - that solved the problem. Now, I have a new one however:
>>>
>>> The client -> proxy connection is kept alive correctly. The proxy ->
>>> server connection, however, is not. Squid closes the connection to the
>>> server after the client issues a second request. After that, Squid opens
>>> a new connection to the server and sends the second request over a new
>>> connection.
>>
>> For POSTs yes. This is a feature, not a bug.
>>
>> The reason Squid does this is because it can not be certain that the
>> server really supports persistent connections or that it is willing to
>> accept the request, and terminating a POST mid-way due to the server
>> closing the connection is very bad.. because of this Squid do not reuse
>> connections for POST requests instead opening a new connection.
>
> It's still a feature, right ?

Mostly. We are working on HTTP/1.1 features to avoid closing them. A lot
of servers still require it though.

> On the Internet, there are some web applications which requires
> multi post requests in a http connection...

Ah, well. *requiring* things beyond the RFCs (agreed compatible
standards) is a well known cause of failure. Just ask anyone trying to
use NTLM on a public website.

The IP layer itself requires that every application using it to
communicate be able to cope with connections being closed early.

Amos

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