Node.js: introducing websocket support.

src/nodejs/unit-http/utils.js

@@ -0,0 +1,73 @@
+var noop = exports.noop = function(){};
+
+exports.extend = function extend(dest, source) {
+    for (var prop in source) {
+        dest[prop] = source[prop];
+    }
+};
+
+exports.eventEmitterListenerCount =
+    require('events').EventEmitter.listenerCount ||
+    function(emitter, type) { return emitter.listeners(type).length; };
+
+exports.bufferAllocUnsafe = Buffer.allocUnsafe ?
+    Buffer.allocUnsafe :
+    function oldBufferAllocUnsafe(size) { return new Buffer(size); };
+
+exports.bufferFromString = Buffer.from ?
+    Buffer.from :
+    function oldBufferFromString(string, encoding) {
+      return new Buffer(string, encoding);
+    };
+
+exports.BufferingLogger = function createBufferingLogger(identifier, uniqueID) {
+    try {
+        var logFunction = require('debug')(identifier);
+    }
+    catch(e) {
+        logFunction = noop;
+        logFunction.enabled = false;
+    }
+
+    if (logFunction.enabled) {
+        var logger = new BufferingLogger(identifier, uniqueID, logFunction);
+        var debug = logger.log.bind(logger);
+        debug.printOutput = logger.printOutput.bind(logger);
+        debug.enabled = logFunction.enabled;
+        return debug;
+    }
+    logFunction.printOutput = noop;
+    return logFunction;
+};
+
+function BufferingLogger(identifier, uniqueID, logFunction) {
+    this.logFunction = logFunction;
+    this.identifier = identifier;
+    this.uniqueID = uniqueID;
+    this.buffer = [];
+}
+
+BufferingLogger.prototype.log = function() {
+  this.buffer.push([ new Date(), Array.prototype.slice.call(arguments) ]);
+  return this;
+};
+
+BufferingLogger.prototype.clear = function() {
+  this.buffer = [];
+  return this;
+};
+
+BufferingLogger.prototype.printOutput = function(logFunction) {
+    if (!logFunction) { logFunction = this.logFunction; }
+    var uniqueID = this.uniqueID;
+    this.buffer.forEach(function(entry) {
+        var date = entry[0].toLocaleString();
+        var args = entry[1].slice();
+        var formatString = args[0];
+        if (formatString !== (void 0) && formatString !== null) {
+            formatString = '%s - %s - ' + formatString.toString();
+            args.splice(0, 1, formatString, date, uniqueID);
+            logFunction.apply(global, args);
+        }
+    });
+};