doc/developer-guide/api/functions/TSHttpTxnServerRespGet.en.rst

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   License, Version 2.0 (the "License"); you may not use this file
   except in compliance with the License.  You may obtain a copy of
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   http://www.apache.org/licenses/LICENSE-2.0

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.. include:: ../../../common.defs

.. default-domain:: c

TSHttpTxnServerRespGet
**********************

Synopsis
========

.. code-block:: cpp

    #include <ts/ts.h>

.. function:: TSReturnCode TSHttpTxnServerRespGet(TSHttpTxn txnp, TSMBuffer * bufp, TSMLoc * offset)

Description
===========

Get the response header sent by the upstream server. This will only be useful in a callback on a
hook that is called after the upstream responds, and if there was an upstream response. For
instance, if the inbound request has no remap rule and :ts:cv:`remap is required
<proxy.config.url_remap.remap_required>` then there will be no server response because no outbound
connection was made. In this case the function will return :c:macro:`TS_ERROR`.

The response header is returned in :arg:`bufp` and :arg:`offset`. :arg:`bufp` is the heap in which
the header resides, and :arg:`offset` is the location in that heap. These will be used in subsequent
calls to retrieve information from the header.

.. code-block:: cpp
   :emphasize-lines: 4

   int get_response_status(TSHttpTxn txn) {
      TSMBuffer resp_heap = nullptr;
      TSMLoc resp_hdr = nullptr;
      if (TS_SUCCESS == TSHttpTxnServerRespGet(tnx, &resp_heap, &resp_hdr)) {
         return TSHttpHdrStatusGet(resp_headp, resp_hdr);
      }
      return HTTP_STATUS_NONE;
   }