Catch errors when the server reply is not JSON (#22)

* Update HelperMethods.js

* Update

Co-Authored-By: Jorn Verhoeven <jorn.j.verhoeven@gmail.com>

* Update HelperMethods.js

Co-Authored-By: Jorn Verhoeven <jorn.j.verhoeven@gmail.com>

Co-authored-by: Jorn Verhoeven <jorn.j.verhoeven@gmail.com>

Author: artemlos

internal/HelperMethods.js

@@ -43,7 +43,13 @@ module.exports = class HelperMethods {
                     }
                 } catch(error){
                     if (error.name === "HTTPError") {
-                        reject(new Error(JSON.parse(error.response.body).message));
+                        try {
+                            reject(new Error(JSON.parse(error.response.body).message));
+                        } catch (e) {
+                            reject(new Error("Could not parse the error message returned from the server. "+
+                            "If this error persists, please check that the LicenseServerUrl does not end with '/'. "+
+                            "E.g. 'https://api.cryptolens.io' is correct whereas 'https://api.cryptolens.io/' is not."));
+                        }
                     } else {
                         reject(error);
                     }

package.json

@@ -1,7 +1,7 @@
 {
   "name": "cryptolens",
-  "version": "1.0.7",
-  "description": "Client API for NodeJS to access Cryptolens Software Licensing API",
+  "version": "1.0.8",
+  "description": "Client API for NodeJS to access Cryptolens Software Licensing API.",
   "main": "main.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"