Kong pre/post-function collection

http-to-https-location-post.lua

-- Problem: sometimes the remote server will return a http:// url and browser gets redirected to a non-https url even though it is accessing https endpoint
-- This post-function snippet in Kong helps you overwrite the http part in Location header.
if kong.response.get_status() == 302 and kong.response.get_header("location") ~= "^http" then 
  local new_loc =  kong.response.get_header("Location"):gsub("http","https") 
  kong.response.set_header("Location",new_loc)  
end

index-redirect.lua

-- Problem: Some servers don't always redirect you to index.html (e.g. static sites served by non-public s3 bucket)
-- This pre-function will redirect the request to index.html when / is accessed
if kong.request.get_path() == "/" then
  kong.service.request.set_path("/index.html") 
  kong.response.set_header("Location","/index.html") 
  return kong.response.exit(301,"/index.html") 
end