Function TSRemapDoRemap

plugins/header_rewrite/header_rewrite.cc:550–598

////////////////////////////////////////////////////////////////////////// This is the main "entry" point for the plugin, called for every request.

// This is the main "entry" point for the plugin, called for every request.
//
TSRemapStatus
TSRemapDoRemap(void *ih, TSHttpTxn rh, TSRemapRequestInfo *rri)
{
  // Make sure things are properly setup (this should never happen)
  if (nullptr == ih) {
    Dbg(pi_dbg_ctl, "No Rules configured, falling back to default");
    return TSREMAP_NO_REMAP;
  }

  TSRemapStatus rval = TSREMAP_NO_REMAP;
  RulesConfig  *conf = static_cast<RulesConfig *>(ih);

  // Go through all hooks we support, and setup the txn hook(s) as necessary
  for (int i = TS_HTTP_READ_REQUEST_HDR_HOOK; i < TS_HTTP_LAST_HOOK; ++i) {
    if (conf->rule(i)) {
      TSHttpTxnHookAdd(rh, static_cast<TSHttpHookID>(i), conf->continuation());
      Dbg(pi_dbg_ctl, "Added remapped TXN hook=%s", TSHttpHookNameLookup(static_cast<TSHttpHookID>(i)));
    }
  }

  // Now handle the remap specific rules for the "remap hook" (which is not a real hook).
  // This is sufficiently different than the normal cont_rewrite_headers() callback, and
  // we can't (shouldn't) schedule this as a TXN hook.
  RuleSet  *rule = conf->rule(TS_REMAP_PSEUDO_HOOK);
  Resources res(rh, rri);

  if (rule) {
    res.gather(conf->resid(TS_REMAP_PSEUDO_HOOK), TS_REMAP_PSEUDO_HOOK);

    do {
      const RuleSet::OperatorPair &ops = rule->eval(res);
      const OperModifiers          rt  = rule->exec(ops, res);

      ink_assert((rt & OPER_NO_REENABLE) == 0);

      if (res.changed_url == true) {
        rval = TSREMAP_DID_REMAP;
      }

      if (rule->last() || (rt & OPER_LAST)) {
        break; // Conditional break, force a break with [L]
      }

    } while ((rule = rule->next));
  }

  Dbg(dbg_ctl, "Returning from TSRemapDoRemap with status: %d", rval);
  return rval;
}