nginx-vars.lua

-- print all nginx variables
-- author: allex_wang
-- GistID: b9f5206b58570d7686c6f22b8fed3144

local inspect = require('inspect')

local keys = {
  "args",
  "binary_remote_addr",
  "body_bytes_sent",
  "bytes_sent",
  "connection",
  "connection_requests",
  "content_length",
  "content_type",
  "document_root",
  "document_uri",
  "domain",
  "host",
  "hostname",
  "http_cookie",
  "http_host",
  "http_origin",
  "http_purge_cache",
  "http_referer",
  "http_user_agent",
  "http_via",
  "http_x_allex",
  "http_x_forwarded_for",
  "https",
  "is_args",
  "limit_rate",
  "msec",
  "nginx_version",
  "pid",
  "pipe",
  "proxy_protocol_addr",
  "query_string",
  "realpath_root",
  "remote_addr",
  "remote_port",
  "remote_user",
  "request",
  "request_body",
  "request_body_file",
  "request_completion",
  "request_filename",
  "request_length",
  "request_method",
  "request_time",
  "request_uri",
  "scheme",
  "sent_http_cache_control",
  "sent_http_connection",
  "sent_http_content_length",
  "sent_http_content_type",
  "sent_http_keep_alive",
  "sent_http_last_modified",
  "sent_http_location",
  "sent_http_transfer_encoding",
  "server_addr",
  "server_name",
  "server_port",
  "server_protocol",
  "status",
  "time_iso8601",
  "time_local",
  "uri",
  "x_scheme"
}

for k,v in ipairs(keys) do
  ngx.say(v, " -> ", inspect(ngx.var[v]))
end

  # wget -O /etc/nginx/lua/inspect.lua https://raw.githubusercontent.com/kikito/inspect.lua/master/inspect.lua
  # handle /echo-raw/*
  location /echo-raw {
    default_type text/plain;
    access_by_lua_file /etc/nginx/lua/nginx_vars.lua;
  }