Intercept origin server requests.
TSHttpTxnServerIntercept() allows a plugin take over the servicing of the
request as though it was the origin server. In the event a request needs to be
made to the server for transaction txnp, contp will be sent a
TS_EVENT_NET_ACCEPT event. The edata passed with
TS_EVENT_NET_ACCEPT is an
TSVConn just as it would be for a
normal accept. The plugin must act as if it is an HTTP server and read the HTTP
request and body from the
TSVConn and send an HTTP response header and
TSHttpTxnServerIntercept() must be not be called after the connection to
the server has taken place. This means that the last hook that it can be called
TS_HTTP_READ_CACHE_HDR_HOOK. If a connection to the server is
not necessary, the continuation contp will be sent a
TS_EVENT_NET_ACCEPT_FAILED event when the transaction completes.
The response from the plugin is cached subject to standard and configured HTTP
caching rules. Should the plugin wish the response not be cached, the plugin
must use appropriate HTTP response headers to prevent caching. The primary
TSHttpTxnServerIntercept() is allow plugins to provide gateways
to other protocols or to allow to plugin to its own transport for the next hop
to the server.
TSHttpTxnServerIntercept() overrides parent cache