AjaxFileUploaderV2.1修改版
1.高版本jquery没有handleError函数的出错处理.
2.对于服务器响应的ContentType不同设置可能会包含多余的pre标签出错处理.
3.对于发请求的dataType设为html出错的处理.
4.对于textarea字段(值含有双引号等特殊字符号时,发现值会被截取)出错的处理.
5.不能同时上传多个文件.
处理:如果高版本的jquery没有handleError,就添加扩展,否则就重写覆盖低版本的handleError.
做法:从jquery1.2.1(作者开发所需的jquery最低版本)复制handleError函数到ajaxfileupload.js,为jquery添加扩展.
2.对于服务器响应的ContentType不同设置可能会包含多余的pre标签.
处理:如果包含多余的pre标签,就要除掉
做法: 将io.contentWindow.document.body.innerHTML改成jQuery('<div>').html(io.contentWindow.document.body.innerHTML).text()
注:firefox没有innerText,否则改为io.contentWindow.document.body.innerText就OK
3.jquery低版本与高版本都没有evalScripts函数.在jquery1.1.4源码有以下注释This method no longer does anything - all script evaluation is taken care of within the HTML injection methods.作者应该从安全方面考虑,删除脚本.
处理:虽然可以从jquery1.1复制过来,但从注释来看,简单处理一下就OK
做法:将jQuery("<div>").html(data).evalScripts();改为jQuery("<div>").html(data).find('script').remove();
4.这问题首先要理解AjaxFileUploader的底层,通过iframe创建一个可上传文件的form,其中ajaxFileUpload的data都会被转成类型为hidden的input,也正是这种转换引起了问题.
处理:对于值含有双引号的字段,应使用textarea,而不是使用hidden的input.(只想出此方法,或许有人可以想出更完美的方法)
做法:
a:修改createUploadForm函数,增加第四个参数textareas,并在处理完data数据转换后加入如下代码:
if (textareas) {
for (var i in textareas) {
jQuery('<textarea name="' + i + '">'+textareas[i]+'</textarea>').appendTo(form);
}
}
b.调用createUploadForm的地方由jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data) == 'undefined' ? false : s.data))改为jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data) == 'undefined' ? false : s.data),(typeof(s.textareas) == 'undefined' ? false : s.textareas))
c.最后创建时,下面是一个例子:
var obj = {
"id": 456,
"password": "13131"
};
var textareas={
"content": $("#content").val()
};
$.ajax()
$.ajaxFileUpload({
url:"user/save",
type: "POST",
secureuri: false,
fileElementId: 'bgFileToUpload',
data: obj,
textareas:textareas,
dataType: "json",
success: function (data) {
console.log(data);
}
});
如果将上面的data不用hidden的input,都统一使用textarea,那么就不必要加入第四个参数textareas,外部创建请求调用时也方便.
5.想处理多个上传文件.就要修改源码对fileElementId的处理就可以了.
处理与做法:将上传文件的部分改成for循环.
if(typeof(fileElementId)=="string"){
fileElementId=[fileElementId];
}
for(var i in fileElementId) {
var oldElement = jQuery('#' + fileElementId[i]);
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
}
最改后的源码:
jQuery.extend({
createUploadIframe: function (id, uri) {
//create frame
var frameId = 'jUploadFrame' + id;
var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
if (window.ActiveXObject) {
if (typeof uri == 'boolean') {
iframeHtml += ' src="' + 'javascript:false' + '"';
} else if (typeof uri == 'string') {
iframeHtml += ' src="' + uri + '"';
}
}
iframeHtml += ' />';
jQuery(iframeHtml).appendTo(document.body);
return jQuery('#' + frameId).get(0);
},
createUploadForm: function (id, fileElementId, data) {
//Create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
//Handle files
if(typeof(fileElementId)=="string"){
fileElementId=[fileElementId];
}
for(var i in fileElementId) {
var oldElement = jQuery('#' + fileElementId[i]);
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
}
//Handle data
if (data) {
for (var i in data) {
jQuery('<textarea name="' + i + '" style="display:none;">'+data[i]+'</textarea>').appendTo(form);
}
}
//Set attributes
jQuery(form).css('position', 'absolute');
jQuery(form).css('top', '-1200px');
jQuery(form).css('left', '-1200px');
jQuery(form).appendTo('body');
return form;
},
ajaxFileUpload: function (s) {
// introduce global settings, allowing the client to modify them for all requests, not only timeout
s = jQuery.extend({}, jQuery.ajaxSettings, s);
var id = new Date().getTime();
var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data) == 'undefined' ? false : s.data));
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if (s.global && !jQuery.active++) {
jQuery.event.trigger("ajaxStart");
}
var requestDone = false;
// Create the request object
var xml = {};
if (s.global)
jQuery.event.trigger("ajaxSend", [xml, s]);
// Wait for a response to come back
var uploadCallback = function (isTimeout) {
var io = document.getElementById(frameId);
try {
if (io.contentWindow) {
xml.responseText = io.contentWindow.document.body ? jQuery('<div>').html(io.contentWindow.document.body.innerHTML).text(): null;
xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
} else if (io.contentDocument) {
xml.responseText = io.contentWindow.document.body ? jQuery('<div>').html(io.contentWindow.document.body.innerHTML).text(): null;
xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
}
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (xml || isTimeout == "timeout") {
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if (status != "error") {
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData(xml, s.dataType);
// If a local callback was specified, fire it and pass it the data
if (s.success)
s.success(data, status);
// Fire the global callback
if (s.global)
jQuery.event.trigger("ajaxSuccess", [xml, s]);
} else
jQuery.handleError(s, xml, status);
} catch (e) {
status = "error";
jQuery.handleError(s, xml, status, e);
}
// The request was completed
if (s.global)
jQuery.event.trigger("ajaxComplete", [xml, s]);
// Handle the global AJAX counter
if (s.global && !--jQuery.active)
jQuery.event.trigger("ajaxStop");
// Process result
if (s.complete)
s.complete(xml, status);
jQuery(io).unbind();
setTimeout(function () {
try {
jQuery(io).remove();
jQuery(form).remove();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
}, 100);
xml = null;
}
};
// Timeout checker
if (s.timeout > 0) {
setTimeout(function () {
// Check to see if the request is still happening
if (!requestDone) uploadCallback("timeout");
}, s.timeout);
}
try {
var form = jQuery('#' + formId);
jQuery(form).attr('action', s.url);
jQuery(form).attr('method', 'POST');
jQuery(form).attr('target', frameId);
if (form.encoding) {
jQuery(form).attr('encoding', 'multipart/form-data');
} else {
jQuery(form).attr('enctype', 'multipart/form-data');
}
jQuery(form).submit();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
jQuery('#' + frameId).load(uploadCallback);
return {abort: function () {
}};
},
uploadHttpData: function (r, type) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if (type == "script")
jQuery.globalEval(data);
// Get the JavaScript object, if JSON is used.
if (type == "json")
eval("data = " + data);
// evaluate scripts within html
if (type == "html")
jQuery("<div>").html(data).find('script').remove();
return data;
},
handleError: function( s, xml, status, e ) {
// If a local callback was specified, fire it
if ( s.error )
s.error( xml, status, e );
// Fire the global callback
if ( s.global )
jQuery.event.trigger( "ajaxError", [xml, s, e] );
}
});
源码:http://download.csdn.net/detail/xiejx618/8666001