conf.d/commons/common-headers.conf

#/*
# * Copyright (c) 2012 Adobe Systems Incorporated. All rights reserved.
# *
# * Permission is hereby granted, free of charge, to any person obtaining a
# * copy of this software and associated documentation files (the "Software"),
# * to deal in the Software without restriction, including without limitation
# * the rights to use, copy, modify, merge, publish, distribute, sublicense,
# * and/or sell copies of the Software, and to permit persons to whom the
# * Software is furnished to do so, subject to the following conditions:
# *
# * The above copyright notice and this permission notice shall be included in
# * all copies or substantial portions of the Software.
# *
# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# * DEALINGS IN THE SOFTWARE.
# *
# */
# -------------------------
# add X-Request-Id header
# -------------------------
set $requestId $http_x_request_id;
set_secure_random_alphanum $requestId_random 32;
set_if_empty $requestId $requestId_random;
add_header X-Request-Id $requestId;
proxy_set_header X-Request-Id  $requestId;

# -----------
#  X-Real-IP
# -----------
set $proxy_remote_addr $http_x_real_ip;
set_if_empty $proxy_remote_addr $remote_addr;
proxy_set_header X-Real-IP $proxy_remote_addr;

# -----------------
#  X-Forwarded-For
#  X-Forwarded-Host
# -----------------
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $host;

# -----------------
# X-Forwarded-Port
# -----------------
set $proxy_forwarded_port $http_x_forwarded_port;
set_if_empty $proxy_forwarded_port $server_port;
proxy_set_header X-Forwarded-Port $proxy_forwarded_port;

# ------------------
# X-Forwarded-Proto
# ------------------
set $proxy_forwarded_proto $http_x_forwarded_proto;
set_if_empty $proxy_forwarded_proto $scheme;
proxy_set_header X-forwarded-Proto $proxy_forwarded_proto;

# ---------------
# X-Gateway-Host
# ---------------
set_by_lua_block $gateway_host {
  local host = os.getenv("HOST")
  local port = os.getenv("PORT")
  if host ~= nil and port ~= nil then
    return host .. ":" .. port
  end
}
add_header X-Gateway-Host $gateway_host;