impl get_body method in request to get json body data

src/request.rs

@@ -66,6 +66,14 @@ impl<'a> HTTPRequest<'a> {
         }
     }
 
+    /// get_body returns the body data as JsonValue
+    pub fn get_body(&self) -> Option<&JsonValue> {
+        match self.body {
+            Some(ref b) => Some(b.get_data()),
+            None => None,
+        }
+    }
+
     pub fn get_target(&self) -> &str {
         self.start_line.get_target()
     }