174 lines
5.2 KiB
JavaScript
174 lines
5.2 KiB
JavaScript
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/*
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* Open source library released under licence used by JQuery.
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* http://plugins.jquery.com/project/ajaxFileUpload
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*/
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jQuery.extend({
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createUploadIframe:function(id,uri){
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var frameId='jUploadFrame' + id;
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if(window.ActiveXObject){
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var io=document.createElement('<iframe id="'+frameId+'" name="'+frameId+'" />');
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if(typeof uri=='boolean'){
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io.src='javascript:false';
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}else if(typeof uri=='string'){
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io.src=uri;
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}
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}else{
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var io=document.createElement('iframe');
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io.id=frameId;
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io.name=frameId;
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}
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io.style.position='absolute';
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io.style.top='-1000px';
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io.style.left='-1000px';
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document.body.appendChild(io);
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return io;
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},
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createUploadForm:function(id,fileElementId){
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// Create form
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var formId = 'jUploadForm' + id;
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var fileId = 'jUploadFile' + id;
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var form = $('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
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var oldElement = $('#' + fileElementId);
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var newElement = $(oldElement).clone();
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$(oldElement).attr('id', fileId);
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$(oldElement).before(newElement);
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$(oldElement).appendTo(form);
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// Set CSS attributes
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$(form).css('position', 'absolute');
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$(form).css('top', '-1200px');
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$(form).css('left', '-1200px');
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$(form).appendTo('body');
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return form;
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},
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ajaxFileUpload:function(s){
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// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
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s = jQuery.extend({}, jQuery.ajaxSettings, s);
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var id = new Date().getTime();
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var form = jQuery.createUploadForm(id,s.fileElementId);
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var io = jQuery.createUploadIframe(id,s.secureuri);
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var frameId = 'jUploadFrame' + id;
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var formId = 'jUploadForm' + id;
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// Watch for a new set of requests
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if(s.global && !jQuery.active++){
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jQuery.event.trigger( "ajaxStart" );
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}
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var requestDone = false;
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// Create the request object
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var xml = {}
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if(s.global){
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jQuery.event.trigger("ajaxSend", [xml, s]);
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}
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// Wait for a response to come back
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var uploadCallback = function(isTimeout){
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var io = document.getElementById(frameId);
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try{
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if(io.contentWindow){
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xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
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xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
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}else if(io.contentDocument){
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xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
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xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
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}
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}catch(e){
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jQuery.handleError(s,xml,null,e);
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}
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if(xml || isTimeout=="timeout"){
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requestDone = true;
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var status;
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try{
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status = isTimeout != "timeout" ? "success" : "error";
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// Make sure that the request was successful or notmodified
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if(status != "error"){
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// process the data (runs the xml through httpData regardless of callback)
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var data = jQuery.uploadHttpData(xml,s.dataType);
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// If a local callback was specified, fire it and pass it the data
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if(s.success){
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s.success( data, status );
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}
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// Fire the global callback
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if(s.global){
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jQuery.event.trigger("ajaxSuccess",[xml,s]);
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}
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}else{
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jQuery.handleError(s,xml,status);
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}
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}catch(e){
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status = "error";
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jQuery.handleError(s,xml,status,e);
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}
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// The request was completed
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if(s.global){
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jQuery.event.trigger("ajaxComplete",[xml,s]);
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}
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// Handle the global AJAX counter
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if(s.global && !--jQuery.active){
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jQuery.event.trigger("ajaxStop");
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}
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// Process result
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if(s.complete){
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s.complete(xml, status);
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}
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jQuery(io).unbind();
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setTimeout(function(){
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try{
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$(io).remove();
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$(form).remove();
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}catch(e){
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jQuery.handleError(s, xml, null, e);
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}
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},100);
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xml = null;
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}
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}
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// Timeout checker
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if(s.timeout>0){
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setTimeout(function(){
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// Check to see if the request is still happening
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if(!requestDone) uploadCallback("timeout");
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},s.timeout);
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}
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try{
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// var io = $('#' + frameId);
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var form = $('#' + formId);
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$(form).attr('action', s.url);
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$(form).attr('method', 'POST');
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$(form).attr('target', frameId);
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if(form.encoding){
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form.encoding = 'multipart/form-data';
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}else{
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form.enctype = 'multipart/form-data';
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}
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$(form).submit();
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}catch(e){
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jQuery.handleError(s,xml,null,e);
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}
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if(window.attachEvent){
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document.getElementById(frameId).attachEvent('onload', uploadCallback);
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}else{
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document.getElementById(frameId).addEventListener('load', uploadCallback, false);
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}
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return {abort:function(){}};
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},
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uploadHttpData:function(r,type){
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var data = !type;
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data = type == "xml" || data ? r.responseXML : r.responseText;
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// If the type is "script", eval it in global context
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if(type=="script"){
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jQuery.globalEval(data);
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}
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// Get the JavaScript object, if JSON is used.
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if(type=="json"){
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eval("data = "+data);
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}
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// evaluate scripts within html
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if(type=="html"){
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jQuery("<div>").html(data).evalScripts();
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}
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//alert($('param', data).each(function(){alert($(this).attr('value'));}));
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return data;
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}
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})
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