Merge pull request #25 from crowdsecurity/fix_error

improve configuration mgmt code

lib/plugins/crowdsec/ban.lua

@@ -9,6 +9,9 @@ M.ret_code = ngx.HTTP_FORBIDDEN
 
 
 function M.new(template_path, redirect_location, ret_code)
+    if template_path == nil then
+        return "BAN_TEMPLATE_PATH variable is empty, will ban without template"
+    end
     if utils.file_exist(template_path) == false then
         return "ban template file doesn't exist, will ban without template"
     else

lib/plugins/crowdsec/recaptcha.lua

@@ -45,6 +45,9 @@ function M.New(siteKey, secretKey, TemplateFilePath)
 
     M.SecretKey = secretKey
 
+    if TemplateFilePath == nil then
+      return "CAPTCHA_TEMPLATE_PATH variable is empty, will ban without template"
+    end
     if utils.file_exist(TemplateFilePath) == false then
       return "captcha template file doesn't exist, can't use recaptcha"
     end

lib/plugins/crowdsec/utils.lua

@@ -25,6 +25,9 @@ function M.read_file(path)
  end
 
 function M.file_exist(path)
+ if path == nil then
+   return nil
+ end
  local f = io.open(path, "r")
  if f ~= nil then 
    io.close(f)