sync attach ok

node_modules/file.js

@@ -205,6 +205,35 @@ var File = {
 		});
 	},
 
+	// 下载, 复制一份文件
+	download: function(srcPath, toPath, callback) {
+		var srcIsExists = fs.existsSync(srcPath);
+		if(!srcIsExists) {
+			return callback(false, 'File Not Exists');
+		}
+		console.log(srcPath);
+		console.log(toPath);
+		var toIsExists = fs.existsSync(toPath);
+		function cp() {
+			Common.copyFile(srcPath, toPath, function(ok) {
+				callback(ok);
+			});
+		}
+		if(toIsExists) {
+			fs.unlink(toPath, function(error) {
+				if(!error) {
+					cp();
+				} else {
+					callback(false, 'The Target File Cannot Overwrite');
+				}
+			});
+		} else {
+			cp();
+		}
+	},
+
+
+
 	// 附件操作
 	addAttach: function(filePaths, noteId, callback) {
 		if(!noteId || !filePaths) {