Add Base64 encode/decode parser node

parsers/base64/70-base64.js

@@ -0,0 +1,48 @@
+/**
+ * Copyright 2014 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+module.exports = function(RED) {
+    "use strict";
+
+    function Base64Node(n) {
+        RED.nodes.createNode(this,n);
+        var node = this;
+        this.on("input", function(msg) {
+            if (Buffer.isBuffer(msg.payload)) {
+                // Take binary buffer and make into a base64 string
+                msg.payload = msg.payload.toString('base64');
+                node.send(msg);
+            }
+            else if (typeof msg.payload === "string") {
+                // Take base64 string and make into binary buffer
+                var regexp = new RegExp('^[A-Za-z0-9+\/=]*$');
+                if ( regexp.test(msg.payload) && (msg.payload.length % 4 === 0) ) {
+                    msg.payload = new Buffer(msg.payload,'base64');
+                    node.send(msg);
+                }
+                else {
+                    node.log("Not a Base64 string - maybe we should encode it...");
+                    msg.payload = (new Buffer(msg.payload,"binary")).toString('base64');
+                    node.send(msg);
+                }
+            }
+            else {
+                node.warn("This node only handles strings or buffers.");
+            }
+        });
+    }
+    RED.nodes.registerType("base64",Base64Node);
+}