img save as & notification

node_modules/file.js

@@ -1,5 +1,6 @@
 var db = require('db');
 var fs = require('fs');
+var needle = require('needle');
 var path = require('path');
 var Evt = require('evt');
 var User = require('user');
@@ -310,12 +311,12 @@ var File = {
 		if(!srcIsExists) {
 			return callback(false, 'File Not Exists');
 		}
-		console.log(srcPath);
-		console.log(toPath);
+		// console.log(srcPath);
+		// console.log(toPath);
 		var toIsExists = fs.existsSync(toPath);
 		function cp() {
 			Common.copyFile(srcPath, toPath, function(ok) {
-				callback(ok);
+				callback && callback(ok);
 			});
 		}
 		if(toIsExists) {
@@ -323,7 +324,7 @@ var File = {
 				if(!error) {
 					cp();
 				} else {
-					callback(false, 'The Target File Cannot Overwrite');
+					callback && callback(false, 'The Target File Cannot Overwrite');
 				}
 			});
 		} else {
@@ -331,8 +332,6 @@ var File = {
 		}
 	},
 
-
-
 	// 附件操作
 	addAttach: function(filePaths, noteId, callback) {
 		if(!noteId || !filePaths) {
@@ -400,7 +399,64 @@ var File = {
 				}
 			}
 		});
-	}
+	},
+
+	// 下载图片, 本地的, 或外站的
+	downloadImg: function(src, callback) {
+		var me = this;
+		// 本地的
+		if(src.indexOf('http://127.0.0.1') != -1) {
+			var ret = /fileId=([a-zA-Z0-9]{24})/.exec(src);
+			if(ret && ret.length == 2) {
+				var fileId = ret[1];
+				me.getImage(fileId, function(filePath) {
+					callback(filePath);
+				});
+			} else {
+				callback();
+			}
+			
+		} else {
+			// 远程的图片
+			needle.get(src, function(err, resp) {
+				// console.log(resp);
+				/*
+				{ 'accept-ranges': 'bytes',
+				  'content-disposition': 'inline; filename="logo.png"',
+				  'content-length': '8583',
+				  'content-type': 'image/png',
+				  date: 'Mon, 19 Jan 2015 15:01:47 GMT',
+	  			*/
+				// log(resp.headers);
+				if(err || !resp || resp.statusCode == 404) {
+					callback(false);
+				} else {
+					// 当图片没有时候还是执行这一步
+
+					var typeStr = resp.headers['content-type'];
+					var type = 'png';
+					if(typeStr) {
+						var typeArr = typeStr.split('/');
+						if(typeStr.length > 1) {
+							type = typeArr[1];
+						}
+					}
+
+					var filename = Common.uuid() + '.' + type;
+					var imagePath = User.getCurUserImagesPath();
+					var imagePathAll = imagePath + '/' + filename;
+					fs.writeFile(imagePathAll, resp.body, function(err) {
+						if(err) {
+							callback(false);
+						} else {
+							callback(imagePathAll);
+						}
+					});
+				}
+			});
+		}
+
+	},
 };
 
 module.exports = File;