Implement ArrayBufferWriter.

guacamole-common-js/src/main/webapp/modules/ArrayBufferWriter.js

@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2013 Glyptodon LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+var Guacamole = Guacamole || {};
+
+/**
+ * A writer which automatically writes to the given output stream with arbitrary
+ * binary data, supplied as ArrayBuffers.
+ * 
+ * @constructor
+ * @param {Guacamole.OutputStream} stream The stream that data will be written
+ *                                        to.
+ */
+Guacamole.ArrayBufferWriter = function(stream) {
+
+    /**
+     * Reference to this Guacamole.StringWriter.
+     * @private
+     */
+    var guac_writer = this;
+
+    // Simply call onack for acknowledgements
+    stream.onack = function(message, code) {
+        if (guac_writer.onack)
+            guac_writer.onack(message, code);
+    };
+
+    /**
+     * Sends the given data.
+     * 
+     * @param {ArrayBuffer} data The data to send.
+     */
+    this.sendData = function(data) {
+
+        var bytes = new Uint8Array(data);
+        var binary = "";
+
+        // Produce binary string from bytes in buffer
+        for (var i=0; i<bytes.byteLength; i++)
+            binary += String.fromCharCode(bytes[i]);
+
+        // Send as base64
+        stream.sendBlob(window.btoa(binary));
+
+    };
+
+    /**
+     * Signals that no further text will be sent, effectively closing the
+     * stream.
+     */
+    this.sendEnd = function() {
+        stream.sendEnd();
+    };
+
+    /**
+     * Fired for received data, if acknowledged by the server.
+     * @event
+     * @param {String} message A human-readable status message related to the
+     *                         operation performed.
+     * @param {Number} code The error code associated with the operation.
+     */
+    this.onack = null;
+
+};