On 12/15/2010 11:28 PM, Daniel Stenberg wrote:
Are muliple pipelines within ONE multi handle possible ?
No.
My first thought: Maybe that would be a solution to the behaviour
with the local ports above? All handles with the same local ports are
pipelined over the same conection / pipe. In case no connection for a
local port exists, another pipe is with the local port is created
inside the multi handle and used for all handles with a local port
fitting to that new connection. ?
My answer was a bit short (to say it nice). There's no way to
explicitly control the number of pipelines. libcurl simply dictates
what goes into a pipeline and what doesn't.
When you ask for pipelining within a multi handle, libcurl will
attempt to pipeline every request you add and it will attempt to do
that on the connections that it already has. It can then create
pipelines on every connection that it has, which then can be a large
amount.
If we just make sure ConnectionExists() takes the local port into
account, it should be possible to basically handicraft which requests
go to which pipelines by binding specific easy handles to specific
local ports.
Or did I oversee anything?
When I understand you correctly, then the only thing to do to support
multiple pipelines is to take care, that the local port for easy handles
is taken into account. Libcurl then pipes requests for existing
connections or opens new connections in case a connection with the local
port does not exist yet. Then multiple pipelines may exist within one
multi handle.
I'm not familiar with the libcurl source code in detail, but from
logical point of view that should work.
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