Improved safeJSONStringfy that serializes Error objects. (#154)

* Ensure that services include web routes to they can potentialy serve websites.

* Improved safeJSONStringfy that serializes Error objects.

lib/utils.js

@@ -23,14 +23,23 @@ class Utils {
   /**
    * @name safeJSONStringify
    * @summary Safe JSON stringify
-   * @description Note, that this function if very different from the
-   *  JSON.stringify function in that it won't accept non objects.
    * @param {object} obj - object to stringify
    * @return {string} string - stringified object.
-   *   Returns undefined if the object isn't a valid object or can't be stringified
    */
   static safeJSONStringify(obj) {
-    return JSON.stringify(obj);
+    // replaceErrors below credited to Jonathan Lonowski via Stackoverflow:
+    // https://stackoverflow.com/questions/18391212/is-it-not-possible-to-stringify-an-error-using-json-stringify
+    let replaceErrors = (key, value) => {
+      if (value instanceof Error) {
+        let error = {};
+        Object.getOwnPropertyNames(value).forEach((key) => {
+          error[key] = value[key];
+        });
+        return error;
+      }
+      return value;
+    };
+    return JSON.stringify(obj, replaceErrors);
   }
 
   /**

package.json

@@ -1,6 +1,6 @@
 {
   "name": "hydra",
-  "version": "1.4.18",
+  "version": "1.4.20",
   "license": "MIT",
   "author": "Carlos Justiniano",
   "contributors": "https://github.com/flywheelsports/hydra/graphs/contributors",