AjaxUpLoad.js实现文件上传
作者:lijiao 发布时间:2024-05-11 09:42:07
标签:AjaxUpLoad.js,上传
AjaxUpload.js文件的代码,供大家参考,具体内容如下
/**
* AJAX Upload ( http://valums.com/ajax-upload/ )
* Copyright (c) Andris Valums
* Licensed under the MIT license ( http://valums.com/mit-license/ )
* Thanks to Gary Haran, David Mark, Corey Burns and others for contributions
*/
(function () {
/* global window */
/* jslint browser: true, devel: true, undef: true, nomen: true, bitwise: true, regexp: true, newcap: true, immed: true */
/**
* Wrapper for FireBug's console.log
*/
function log() {
if (typeof(console) != 'undefined' && typeof(console.log) == 'function') {
Array.prototype.unshift.call(arguments, '[Ajax Upload]');
console.log(Array.prototype.join.call(arguments, ' '));
}
}
/**
* Attaches event to a dom element.
* @param {Element} el
* @param type event name
* @param fn callback This refers to the passed element
*/
function addEvent(el, type, fn) {
if (el.addEventListener) {
el.addEventListener(type, fn, false);
} else if (el.attachEvent) {
el.attachEvent('on' + type, function () {
fn.call(el);
});
} else {
throw new Error('not supported or DOM not loaded');
}
}
/**
* Attaches resize event to a window, limiting
* number of event fired. Fires only when encounteres
* delay of 100 after series of events.
*
* Some browsers fire event multiple times when resizing
* http://www.quirksmode.org/dom/events/resize.html
*
* @param fn callback This refers to the passed element
*/
function addResizeEvent(fn) {
var timeout;
addEvent(window, 'resize', function () {
if (timeout) {
clearTimeout(timeout);
}
timeout = setTimeout(fn, 100);
});
}
// Needs more testing, will be rewriten for next version
// getOffset function copied from jQuery lib (http://jquery.com/)
if (document.documentElement.getBoundingClientRect) {
// Get Offset using getBoundingClientRect
// http://ejohn.org/blog/getboundingclientrect-is-awesome/
var getOffset = function (el) {
var box = el.getBoundingClientRect();
var doc = el.ownerDocument;
var body = doc.body;
var docElem = doc.documentElement; // for ie
var clientTop = docElem.clientTop || body.clientTop || 0;
var clientLeft = docElem.clientLeft || body.clientLeft || 0;
// In Internet Explorer 7 getBoundingClientRect property is treated as physical,
// while others are logical. Make all logical, like in IE8.
var zoom = 1;
if (body.getBoundingClientRect) {
var bound = body.getBoundingClientRect();
zoom = (bound.right - bound.left) / body.clientWidth;
}
if (zoom > 1) {
clientTop = 0;
clientLeft = 0;
}
var top = box.top / zoom + (window.pageYOffset || docElem && docElem.scrollTop / zoom || body.scrollTop / zoom) - clientTop,
left = box.left / zoom + (window.pageXOffset || docElem && docElem.scrollLeft / zoom || body.scrollLeft / zoom) - clientLeft;
return {
top: top,
left: left
};
};
} else {
// Get offset adding all offsets
var getOffset = function (el) {
var top = 0,
left = 0;
do {
top += el.offsetTop || 0;
left += el.offsetLeft || 0;
el = el.offsetParent;
} while (el);
return {
left: left,
top: top
};
};
}
/**
* Returns left, top, right and bottom properties describing the border-box,
* in pixels, with the top-left relative to the body
* @param {Element} el
* @return {Object} Contains left, top, right,bottom
*/
function getBox(el) {
var left, right, top, bottom;
var offset = getOffset(el);
left = offset.left;
top = offset.top;
right = left + el.offsetWidth;
bottom = top + el.offsetHeight;
return {
left: left,
right: right,
top: top,
bottom: bottom
};
}
/**
* Helper that takes object literal
* and add all properties to element.style
* @param {Element} el
* @param {Object} styles
*/
function addStyles(el, styles) {
for (var name in styles) {
if (styles.hasOwnProperty(name)) {
el.style[name] = styles[name];
}
}
}
/**
* Function places an absolutely positioned
* element on top of the specified element
* copying position and dimentions.
* @param {Element} from
* @param {Element} to
*/
function copyLayout(from, to) {
var box = getBox(from);
addStyles(to, {
position: 'absolute',
left: box.left + 'px',
top: box.top + 'px',
width: from.offsetWidth + 'px',
height: from.offsetHeight + 'px'
});
}
/**
* Creates and returns element from html chunk
* Uses innerHTML to create an element
*/
var toElement = (function () {
var div = document.createElement('div');
return function (html) {
div.innerHTML = html;
var el = div.firstChild;
return div.removeChild(el);
};
})();
/**
* Function generates unique id
* @return unique id
*/
var getUID = (function () {
var id = 0;
return function () {
return 'ValumsAjaxUpload' + id++;
};
})();
/**
* Get file name from path
* @param {String} file path to file
* @return filename
*/
function fileFromPath(file) {
return file.replace(/.*(\/|\\)/, "");
}
/**
* Get file extension lowercase
* @param {String} file name
* @return file extenstion
*/
function getExt(file) {
return (-1 !== file.indexOf('.')) ? file.replace(/.*[.]/, '') : '';
}
function hasClass(el, name) {
var re = new RegExp('\\b' + name + '\\b');
return re.test(el.className);
}
function addClass(el, name) {
if (!hasClass(el, name)) {
el.className += ' ' + name;
}
}
function removeClass(el, name) {
var re = new RegExp('\\b' + name + '\\b');
el.className = el.className.replace(re, '');
}
function removeNode(el) {
el.parentNode.removeChild(el);
}
/**
* Easy styling and uploading
* @constructor
* @param button An element you want convert to
* upload button. Tested dimentions up to 500x500px
* @param {Object} options See defaults below.
*/
window.AjaxUpload = function (button, options) {
this._settings = {
// Location of the server-side upload script
action: 'upload.php',
// File upload name
name: 'userfile',
// Additional data to send
data: {},
// Submit file as soon as it's selected
autoSubmit: true,
// The type of data that you're expecting back from the server.
// html and xml are detected automatically.
// Only useful when you are using json data as a response.
// Set to "json" in that case.
responseType: false,
// Class applied to button when mouse is hovered
hoverClass: 'hover',
// Class applied to button when AU is disabled
disabledClass: 'disabled',
// When user selects a file, useful with autoSubmit disabled
// You can return false to cancel upload
onChange: function (file, extension) {},
// Callback to fire before file is uploaded
// You can return false to cancel upload
onSubmit: function (file, extension) {},
// Fired when file upload is completed
// WARNING! DO NOT USE "FALSE" STRING AS A RESPONSE!
onComplete: function (file, response) {}
};
// Merge the users options with our defaults
for (var i in options) {
if (options.hasOwnProperty(i)) {
this._settings[i] = options[i];
}
}
// button isn't necessary a dom element
if (button.jquery) {
// jQuery object was passed
button = button[0];
} else if (typeof button == "string") {
if (/^#.*/.test(button)) {
// If jQuery user passes #elementId don't break it
button = button.slice(1);
}
button = document.getElementById(button);
}
if (!button || button.nodeType !== 1) {
throw new Error("Please make sure that you're passing a valid element");
}
if (button.nodeName.toUpperCase() == 'A') {
// disable link
addEvent(button, 'click', function (e) {
if (e && e.preventDefault) {
e.preventDefault();
} else if (window.event) {
window.event.returnValue = false;
}
});
}
// DOM element
this._button = button;
// DOM element
this._input = null;
// If disabled clicking on button won't do anything
this._disabled = false;
// if the button was disabled before refresh if will remain
// disabled in FireFox, let's fix it
this.enable();
this._rerouteClicks();
};
// assigning methods to our class
AjaxUpload.prototype = {
setData: function (data) {
this._settings.data = data;
},
disable: function () {
addClass(this._button, this._settings.disabledClass);
this._disabled = true;
var nodeName = this._button.nodeName.toUpperCase();
if (nodeName == 'INPUT' || nodeName == 'BUTTON') {
this._button.setAttribute('disabled', 'disabled');
}
// hide input
if (this._input) {
// We use visibility instead of display to fix problem with Safari 4
// The problem is that the value of input doesn't change if it
// has display none when user selects a file
this._input.parentNode.style.visibility = 'hidden';
}
},
enable: function () {
removeClass(this._button, this._settings.disabledClass);
this._button.removeAttribute('disabled');
this._disabled = false;
},
/**
* Creates invisible file input
* that will hover above the button
* <div><input type='file' /></div>
*/
_createInput: function () {
var self = this;
var input = document.createElement("input");
input.setAttribute('type', 'file');
input.setAttribute('name', this._settings.name);
addStyles(input, {
'position': 'absolute',
// in Opera only 'browse' button
// is clickable and it is located at
// the right side of the input
'right': 0,
'margin': 0,
'padding': 0,
'fontSize': '480px',
'cursor': 'pointer'
});
var div = document.createElement("div");
addStyles(div, {
'display': 'block',
'position': 'absolute',
'overflow': 'hidden',
'margin': 0,
'padding': 0,
'opacity': 0,
// Make sure browse button is in the right side
// in Internet Explorer
'direction': 'ltr',
//Max zIndex supported by Opera 9.0-9.2
'zIndex': 2147483583
});
// Make sure that element opacity exists.
// Otherwise use IE filter
if (div.style.opacity !== "0") {
if (typeof(div.filters) == 'undefined') {
throw new Error('Opacity not supported by the browser');
}
div.style.filter = "alpha(opacity=0)";
}
addEvent(input, 'change', function () {
if (!input || input.value === '') {
return;
}
// Get filename from input, required
// as some browsers have path instead of it
var file = fileFromPath(input.value);
if (false === self._settings.onChange.call(self, file, getExt(file))) {
self._clearInput();
return;
}
// Submit form when value is changed
if (self._settings.autoSubmit) {
self.submit();
}
});
addEvent(input, 'mouseover', function () {
addClass(self._button, self._settings.hoverClass);
});
addEvent(input, 'mouseout', function () {
removeClass(self._button, self._settings.hoverClass);
// We use visibility instead of display to fix problem with Safari 4
// The problem is that the value of input doesn't change if it
// has display none when user selects a file
input.parentNode.style.visibility = 'hidden';
});
div.appendChild(input);
document.body.appendChild(div);
this._input = input;
},
_clearInput: function () {
if (!this._input) {
return;
}
// this._input.value = ''; Doesn't work in IE6
removeNode(this._input.parentNode);
this._input = null;
this._createInput();
removeClass(this._button, this._settings.hoverClass);
},
/**
* Function makes sure that when user clicks upload button,
* the this._input is clicked instead
*/
_rerouteClicks: function () {
var self = this;
// IE will later display 'access denied' error
// if you use using self._input.click()
// other browsers just ignore click()
addEvent(self._button, 'mouseover', function () {
if (self._disabled) {
return;
}
if (!self._input) {
self._createInput();
}
var div = self._input.parentNode;
copyLayout(self._button, div);
div.style.visibility = 'visible';
});
// commented because we now hide input on mouseleave
/**
* When the window is resized the elements
* can be misaligned if button position depends
* on window size
*/
//addResizeEvent(function(){
// if (self._input){
// copyLayout(self._button, self._input.parentNode);
// }
//});
},
/**
* Creates iframe with unique name
* @return {Element} iframe
*/
_createIframe: function () {
// We can't use getTime, because it sometimes return
// same value in safari :(
var id = getUID();
// We can't use following code as the name attribute
// won't be properly registered in IE6, and new window
// on form submit will open
// var iframe = document.createElement('iframe');
// iframe.setAttribute('name', id);
var iframe = toElement('<iframe src="javascript:false;" name="' + id + '" />');
// src="javascript:false; was added
// because it possibly removes ie6 prompt
// "This page contains both secure and nonsecure items"
// Anyway, it doesn't do any harm.
iframe.setAttribute('id', id);
iframe.style.display = 'none';
document.body.appendChild(iframe);
return iframe;
},
/**
* Creates form, that will be submitted to iframe
* @param {Element} iframe Where to submit
* @return {Element} form
*/
_createForm: function (iframe) {
var settings = this._settings;
// We can't use the following code in IE6
// var form = document.createElement('form');
// form.setAttribute('method', 'post');
// form.setAttribute('enctype', 'multipart/form-data');
// Because in this case file won't be attached to request
var form = toElement('<form method="post" enctype="multipart/form-data"></form>');
form.setAttribute('action', settings.action);
form.setAttribute('target', iframe.name);
form.style.display = 'none';
document.body.appendChild(form);
// Create hidden input element for each data key
for (var prop in settings.data) {
if (settings.data.hasOwnProperty(prop)) {
var el = document.createElement("input");
el.setAttribute('type', 'hidden');
el.setAttribute('name', prop);
el.setAttribute('value', settings.data[prop]);
form.appendChild(el);
}
}
return form;
},
/**
* Gets response from iframe and fires onComplete event when ready
* @param iframe
* @param file Filename to use in onComplete callback
*/
_getResponse: function (iframe, file) {
// getting response
var toDeleteFlag = false,
self = this,
settings = this._settings;
addEvent(iframe, 'load', function () {
if ( // For Safari
iframe.src == "javascript:'%3Chtml%3E%3C/html%3E';" ||
// For FF, IE
iframe.src == "javascript:'<html></html>';") {
// First time around, do not delete.
// We reload to blank page, so that reloading main page
// does not re-submit the post.
if (toDeleteFlag) {
// Fix busy state in FF3
setTimeout(function () {
removeNode(iframe);
},
0);
}
return;
}
var doc = iframe.contentDocument ? iframe.contentDocument : window.frames[iframe.id].document;
// fixing Opera 9.26,10.00
if (doc.readyState && doc.readyState != 'complete') {
// Opera fires load event multiple times
// Even when the DOM is not ready yet
// this fix should not affect other browsers
return;
}
// fixing Opera 9.64
if (doc.body && doc.body.innerHTML == "false") {
// In Opera 9.64 event was fired second time
// when body.innerHTML changed from false
// to server response approx. after 1 sec
return;
}
var response;
if (doc.XMLDocument) {
// response is a xml document Internet Explorer property
response = doc.XMLDocument;
} else if (doc.body) {
// response is html document or plain text
response = doc.body.innerHTML;
if (settings.responseType && settings.responseType.toLowerCase() == 'json') {
// If the document was sent as 'application/javascript' or
// 'text/javascript', then the browser wraps the text in a <pre>
// tag and performs html encoding on the contents. In this case,
// we need to pull the original text content from the text node's
// nodeValue property to retrieve the unmangled content.
// Note that IE6 only understands text/html
if (doc.body.firstChild && doc.body.firstChild.nodeName.toUpperCase() == 'PRE') {
response = doc.body.firstChild.firstChild.nodeValue;
}
if (response) {
response = eval("(" + response + ")");
} else {
response = {};
}
}
} else {
// response is a xml document
response = doc;
}
settings.onComplete.call(self, file, response);
// Reload blank page, so that reloading main page
// does not re-submit the post. Also, remember to
// delete the frame
toDeleteFlag = true;
// Fix IE mixed content issue
iframe.src = "javascript:'<html></html>';";
});
},
/**
* Upload file contained in this._input
*/
submit: function () {
var self = this,
settings = this._settings;
if (!this._input || this._input.value === '') {
return;
}
var file = fileFromPath(this._input.value);
// user returned false to cancel upload
if (false === settings.onSubmit.call(this, file, getExt(file))) {
this._clearInput();
return;
}
// sending request
var iframe = this._createIframe();
var form = this._createForm(iframe);
// assuming following structure
// div -> input type='file'
removeNode(this._input.parentNode);
removeClass(self._button, self._settings.hoverClass);
form.appendChild(this._input);
form.submit();
// request set, clean up
removeNode(form);
form = null;
removeNode(this._input);
this._input = null;
// Get response from iframe and fire onComplete event when ready
this._getResponse(iframe, file);
// get ready for next request
this._createInput();
}
};
})();
0
投稿
猜你喜欢
- mysql -uusername -pyourpassword yourdatabasename < c:\sqlfile.sql其中
- 在利用javascript内置的eval函数,将json格式的字符串转换成JS对象时,需要用一对"()"先将该字符串包住
- 虽然并非你编写的每个 Python 程序都要求一个严格的性能分析,但是让人放心的是,当问题发生的时候,Python 生态圈有各种各样的工具可
- 代码:--库是否存在if exists(select * from master..sysdatabases where name=N
- mktime()方法是localtime()反函数。它的参数是struct_time或全9元组,它返回一个浮点数,为了兼容时ti
- 本文实例讲述了Python常见工厂函数用法。分享给大家供大家参考,具体如下:工厂函数:能够产生类实例的内建函数。 工厂函数是指这些
- 研究好多天了,也试过好多办法了,总结出目前发现最好的方法:先说一下基本的东西:<%@ codepage=65001%>
- 前言ImageNet 是一个著名的公共图像数据库,用于训练对象分类、检测和分割等任务的模型,它包含超过 1400 万张图像。在 Python
- 我突然很好奇,你说那些什么18几年的茅台真的是18几年就开始酿的吗?还有就是一个月要卖那么多,货是怎么供过来的?最后就是,一瓶那么贵,那一个
- 我们不可能直接通过node命令来管理远程站点,这样无法保证网站的可持续运行。我们用Forever来解决这个问题,它可以将NodeJS应用以后
- boto操作import datetimeimport boto.s3.connectionfrom boto.s3.key import
- 结合这个例子分析一下结果:结合以往C语言的基础,画了一张图来解释为什么会有上面这些值的出现。先查看下Go中的这两个运算符是啥吧。①对于所有带
- 在phpcms\modules\wap\index.php里面,搜索下面这句if(!$r || $r['status'] !
- <%'asp事务处理。'测试数据库为sql server,服务器为本机,数据库名为test,表名为a,两个字段id(i
- MySQL 日期类型:日期格式、所占存储空间、日期范围 比较。 日期类型 &nbs
- 思路:利用time函数返回的时间字符串与指定时间字符串做比较,相等的时候执行对应的操作。不知道大家的思路是什么,感觉这样比较耗CPU。。。。
- 本文实例讲述了Python使用re模块正则提取字符串中括号内的内容操作。分享给大家供大家参考,具体如下:直接上代码吧:# -*- codin
- 本文实例讲述了Python统计分析模块statistics用法。分享给大家供大家参考,具体如下:一 计算平均数函数mean()>>
- 数据表都已经创建起来了,假设我们已经插入了许多的数据,我们就可以用自己喜欢的方式对数据表里面的信息进行检索和显示了,比如说:可以象下面这样把
- 前言相信在日常生活中,平常大家聚在一起总会聊聊天,特别是女生(有冒犯到doge)非常喜欢聊星座,这个男生什么星座呀,那个男生什么星座呀…今天