Method HandleApiErrorJump

src/proxy/http/HttpTransact.cc:1733–1771

/////////////////////////////////////////////////////////////////// void HttpTransact::HandleApiErrorJump(State* s) Called after an API function indicates it wished to send an error to the user agent ///////////////////////////////////////////////////////////////////

//     error to the user agent
////////////////////////////////////////////////////////////////////////
void
HttpTransact::HandleApiErrorJump(State *s)
{
  TxnDbg(dbg_ctl_http_trans, "Entering HttpTransact::HandleApiErrorJump");

  // since the READ_REQUEST_HDR_HOOK is processed before
  //   we examine the request, returning TS_EVENT_ERROR will cause
  //   the protocol in the via string to be "?"  Set it here
  //   since we know it has to be http
  // For CONNECT method, next_hop_scheme is NULL
  if (s->next_hop_scheme < 0) {
    s->next_hop_scheme = URL_WKSIDX_HTTP;
  }
  // The client response may not be empty in the
  // case the txn was reenabled in error by a plugin from hook SEND_RESPONSE_HDR.
  // build_response doesn't clean the header. So clean it up before.
  // Do fields_clear() instead of clear() to prevent memory leak
  if (s->hdr_info.client_response.valid()) {
    s->hdr_info.client_response.fields_clear();
  }

  // Set the source to internal so chunking is handled correctly
  s->source = SOURCE_INTERNAL;

  /**
    The API indicated an error. Lets use a >=400 error from the state (if one's set) or fallback to a
    generic HTTP/1.X 500 INKApi Error
  **/
  if (s->http_return_code && s->http_return_code >= HTTP_STATUS_BAD_REQUEST) {
    const char *reason = http_hdr_reason_lookup(s->http_return_code);
    ;
    build_response(s, &s->hdr_info.client_response, s->client_info.http_version, s->http_return_code, reason ? reason : "Error");
  } else {
    build_response(s, &s->hdr_info.client_response, s->client_info.http_version, HTTP_STATUS_INTERNAL_SERVER_ERROR, "INKApi Error");
  }

  TRANSACT_RETURN(SM_ACTION_INTERNAL_CACHE_NOOP, nullptr);
  return;
}

// PPDNSLookupAPICall does an API callout if a plugin set the response_action,
// then calls PPDNSLookup.