plugins/lua/example/test_cache_lookup.lua

--  Licensed to the Apache Software Foundation (ASF) under one
--  or more contributor license agreements.  See the NOTICE file
--  distributed with this work for additional information
--  regarding copyright ownership.  The ASF licenses this file
--  to you under the Apache License, Version 2.0 (the
--  "License"); you may not use this file except in compliance
--  with the License.  You may obtain a copy of the License at
--
--  http://www.apache.org/licenses/LICENSE-2.0
--
--  Unless required by applicable law or agreed to in writing, software
--  distributed under the License is distributed on an "AS IS" BASIS,
--  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
--  See the License for the specific language governing permissions and
--  limitations under the License.


function send_response()
    ts.client_response.header['Rhost'] = ts.ctx['rhost']
    ts.client_response.header['CStatus'] = ts.ctx['cstatus']
end


function cache_lookup()
    local cache_status = ts.http.get_cache_lookup_status()
    ts.ctx['cstatus'] = cache_status
end


function do_remap()
    local req_host = ts.client_request.header.Host

    if req_host == nil then
        return 0
    end

    ts.ctx['rhost'] = string.reverse(req_host)

    ts.hook(TS_LUA_HOOK_SEND_RESPONSE_HDR, send_response)
    ts.hook(TS_LUA_HOOK_CACHE_LOOKUP_COMPLETE, cache_lookup)

    return 0
end