Updated Response Templating (markdown)

Response-Templating.md

@@ -45,6 +45,11 @@ Mapping Json Example:
 The model of the request is supplied to the header and body templates. The following request attributes are available:
 
 * `request.url` - URL path and query
+* `request.method` - The HTTP method such as GET or POST.
+* `request.protocol` - The scheme such as http or https.
+* `request.host` - The name of the host in the URL.
+* `request.origin` - The base URL of the request which is equivalent to `{Protocol}://{Host}:{Port}`.
+
 * `request.absoluteurl` - URL path and query (absolute)
 * `request.path` - URL path
 * `request.absolutepath` - URL path (absolute)