adding a default action type
diff --git a/api-gateway-config/scripts/lua/lib/filemgmt.lua b/api-gateway-config/scripts/lua/lib/filemgmt.lua
index 3be5256..9962251 100644
--- a/api-gateway-config/scripts/lua/lib/filemgmt.lua
+++ b/api-gateway-config/scripts/lua/lib/filemgmt.lua
@@ -18,9 +18,9 @@
 --   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 --   DEALINGS IN THE SOFTWARE.
 
---- @module
---
--- @author Alex Song (songs)
+--- @module filemgmt
+-- Creates the Nginx Conf files
+-- @author Alex Song (songs), David Green (greend)
 
 local utils = require "lib/utils"
 local cjson = require "cjson"
diff --git a/api-gateway-config/scripts/lua/lib/utils.lua b/api-gateway-config/scripts/lua/lib/utils.lua
index fe49819..3d2cc10 100644
--- a/api-gateway-config/scripts/lua/lib/utils.lua
+++ b/api-gateway-config/scripts/lua/lib/utils.lua
@@ -18,11 +18,10 @@
 --   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 --   DEALINGS IN THE SOFTWARE.
 
---- @module
---
--- @author Alex Song (songs), Cody Walker (cmwalker)
+--- @module utils
+-- Holds the common supporting functions in one file to be referenced else where
+-- @author Alex Song (songs), Cody Walker (cmwalker), David Green (greend)
 
-local cjson = require "cjson"
 local _Utils = {}
 
 --- Concatenate a list of strings into a single string. This is more efficient than concatenating
diff --git a/api-gateway-config/scripts/lua/policies/mapping.lua b/api-gateway-config/scripts/lua/policies/mapping.lua
index a970bf4..6748fe3 100644
--- a/api-gateway-config/scripts/lua/policies/mapping.lua
+++ b/api-gateway-config/scripts/lua/policies/mapping.lua
@@ -20,6 +20,7 @@
 
 --- @module mapping
 -- Process mapping object, turning implementation details into request transformations
+-- @author Cody Walker (cmwalker), Alex Song (songs), David Green (greend)
 
 local logger = require "lib/logger"
 local utils = require "lib/utils"
@@ -43,6 +44,8 @@
       removeParam(v)
     elseif v.action == "transform" then
       transformParam(v)
+    elseif v.action == "default" then
+      checkDefault(v)
     else
       logger.err(utils.concatStrings({'Map action not recognized. Skipping... ', v.action}))
     end
@@ -62,7 +65,6 @@
   for k, v in pairs (incomingQuery) do
     query[k] = v
   end
-
 end
 
 --- Insert parameter value to header, body, or query params into request
@@ -116,6 +118,18 @@
   end
 end
 
+--- Checks if the header has been set, and sets the header to a value if found to be null.
+-- @param m Header name and value to be set, if header is null.
+function checkDefault(m)
+  if m.to.location == "header" and headers[m.to.name] == nil then
+    insertHeader(m.to.name, m.from.value)
+  elseif m.to.location == "query" and query[m.to.name] == nil then
+    insertQuery(m.to.name, m.from.value)
+  elseif m.to.location == "body" and body[m.to.name] == nil then
+    insertBody(m.to.name, m.from.value)
+  end
+end
+
 --- Function to handle wildcarding in the transform process.
 -- If the value in the from object is '*', this function will pull all values from the incoming request
 -- and move them to the location provided in the to object
@@ -181,6 +195,7 @@
 
 function insertHeader(k, v)
   ngx.req.set_header(k, v)
+  headers[k] = v
 end
 
 function insertQuery(k, v)
@@ -211,7 +226,7 @@
 
 function parseUrl(url)
   local map = {}
-  for k,v in url:gmatch('([^&=?]+)=([^&=?]+)' ) do
+  for k,v in url:gmatch('([^&=?]+)=([^&=?]+)') do
     map[ k ] = decodeQuery(v)
   end
   return map
diff --git a/api-gateway-config/scripts/lua/routing.lua b/api-gateway-config/scripts/lua/routing.lua
index aab80f5..2eb6a78 100644
--- a/api-gateway-config/scripts/lua/routing.lua
+++ b/api-gateway-config/scripts/lua/routing.lua
@@ -114,7 +114,7 @@
 function getUriPath(backendPath)
   local uriPath
   local i, j = ngx.var.uri:find(ngx.var.gatewayPath)
-  local incomingPath = ngx.var.uri:sub(j + 1)
+  local incomingPath = ((j and ngx.var.uri:sub(j + 1)) or nil)
   -- Check for backendUrl path
   if backendPath == nil or backendPath== '' or backendPath== '/' then
     uriPath = (incomingPath and incomingPath ~= '') and incomingPath or '/'