NAME

       TSHttpTxnParentSelectionUrlSet  -  traffic  Server  Parent  Selection  consistent hash URL
       manipulation API

SYNOPSIS

       #include <ts/ts.h>

       TSReturnCode TSHttpTxnParentSelectionUrlSet(TSHttpTxn txnp, TSMBuffer bufp, TSMLoc offset)

       TSReturnCode TSHttpTxnParentSelectionUrlGet(TSHttpTxn txnp, TSMBuffer bufp, TSMLoc offset)

DESCRIPTION

       The Parent Selection consistent hash feature selects among multiple parent caches based on
       hashing a URL (the HTTP request header URL).

       These  API  functions  allow an over-ride URL to be defined such that the over-ride URL is
       hashed instead of the normal (header request) URL. In addition, any filtering options that
       may  be  applied  to the normal URL (such as qstring) are NOT applied to the over-ride URL
       since it is assumed that custom filtering has already been performed prior  to  explicitly
       setting the over-ride URL.

       Note  that  the normal URL is only hashed on the path and query string portion (optionally
       excluded with the qstring option). However, the over-ride URL is hashed on the entire  URL
       string as returned by URL::string_get_ref(). This includes the scheme and hostname such as
       "http://hostname" which occur prior to the path.

       If the non-path URL elements should not be hashed in a meaningful manner, then they should
       be normalized to some value (if they are required in a valid URL) or excluded (if they are
       optional) when generating the over-ride URL. For  example,  since  the  over-ride  URL  is
       arbitrary,  the  URL  scheme  and  hostname  can  simply be set to "fake://fake.fake" when
       creating the over-ride URL.

       TSHttpTxnParentSelectionUrlSet() will set the over-ride URL.

       TSHttpTxnParentSelectionUrlGet() will get the over-ride URL.

RETURN VALUES

       All these  APIs  returns  a  TSReturnCode,  indicating  success  (TS_SUCCESS)  or  failure
       (TS_ERROR) of the operation.

SEE ALSO

       TSAPI(3ts), TSUrlCreate(3ts), TSUrlStringGet(3ts)

COPYRIGHT

       2018, dev@trafficserver.apache.org