> On 4/4/12 6:36 AM, Servalan eq wrote:> > I am writing a remap plugin to do a
> hybrid reverse proxy / redirection task.In some circumstances I want to call
> out to a seperate http server (not related to the requests) do decide how to
> handle the requests.> > I've coded this up using libcurl, which works but
> seems very slow - creating and destroying a curl_easy_init object per call.
> Is there a way to call an HTTP GET during a plugin's process, just passing
> some request parameters and headers using the internal ATSfunctionality? > >
> It seems TSFetchRespGet or TSFetchURL might work, but I can't see any way to
> make a new tsapi_httptxn with my call in it.> > thanks very much,> > > >
> Yeah, none of this will work (well) in a remap plugin. You need to > rewrite
> this as e.g. a read-request-header hook, and then use > TSHttpConnect() (most
> likely) to fetch the content. This also implies > you have to yield and
> reschedule your continuation while waiting and > processing the response. If
> not (and as you probably have noticed with > your remap plugin), you will
> block the net-thread for the duration of > the request. This is very bad,
> because all clients on that thread are > now stalled until your (curl)
> request finishes.> > -- Leif
Thanks Leif, this mostly makes sense - I am looking at the basic authorization
plugin example (basic-auth.c) and I think I understand it. It is intercepting
calls and terminating some of them by not calling TSHttpTxnReenable(txnp,
TS_EVENT_HTTP_CONTINUE); in the cases where the authorization isn't found (as I
understand it).
I think I can add a hook to TS_HTTP_READ_REQUEST_HDR_HOOK and then have a
continuation called back after a TSHttpConnect call.
Can I then (based on the response) achieve the same results of remapping or
forwarding the response as I am doing in my remap
plugin?TSUrlHostSet(...TSUrlPathSet (...TSUrlHttpQuerySet (...(sometimes)
rri->redirect = 1;
and then return TSREMAP_DID_REMAP
thanks very much,Servalan
