Encode cache keys

* remove restriction on commas in keys
* avoid 404 during save when characters like slashes are used in keys

fixes #53

src/restore.ts

@@ -17,12 +17,16 @@ async function run() {
         );
         core.debug(`Cache Path: ${cachePath}`);
 
-        const primaryKey = core.getInput(Inputs.Key, { required: true });
+        const keys = [
+            core.getInput(Inputs.Key, { required: true }),
+            ...core
+                .getInput(Inputs.RestoreKeys)
+                .split(/\s*\n\s*/)
+                .filter(x => x)
+        ].map(key => encodeURIComponent(key).replace(/%/g, " "));
+        const primaryKey = keys[0];
         core.saveState(State.CacheKey, primaryKey);
 
-        const restoreKeys = core.getInput(Inputs.RestoreKeys).split("\n");
-        const keys = [primaryKey, ...restoreKeys];
-
         core.debug("Resolved Keys:");
         core.debug(JSON.stringify(keys));
 
@@ -39,13 +43,6 @@ async function run() {
                 );
                 return;
             }
-            const regex = /^[^,]*$/;
-            if (!regex.test(key)) {
-                core.setFailed(
-                    `Key Validation Error: ${key} cannot contain commas.`
-                );
-                return;
-            }
         }
 
         try {