1xx response forwarding

Hello,

     We need to forward 1xx control messages from servers to clients. I
see two implementation options:

1. Use Store. Squid client side expects responses via storeClientCopy,
so we will be using the usual/normal code paths. Multiple 1xx responses
may be handled with relative ease. The 1xx responses in Store will be
treated kind of as regular response headers, except they will not be
cached and such. The code will need to "skip" them until they reach the
socket-writing client.

2. Bypass Store. Contact fwdStart caller (e.g., clientReplyContext)
directly and give it a 1xx response to forward. Store code remains
unchanged. It may be difficult to get from the fwdStart caller to the
client socket and comm_write. It will be difficult to handle multiple
1xx responses or a regular response that arrives before we are done with
writing 1xx response (all unusual, but can happen!).

Both approaches may have to deal with crazy offset management,
clientStreams manipulations, and other client-side mess.

Do you see any other options? Which option is the best?

Thank you,

Alex.
Received on Mon Aug 16 2010 - 21:53:52 MDT