dojo.js

对java中如何使用Ajax技术

if(elem==null||((elem==undefined)&&(typeof elem=="undefined"))){
dojo.raise("No element given to dojo.dom.setAttributeNS");
}
if(!((elem.setAttributeNS==undefined)&&(typeof elem.setAttributeNS=="undefined"))){
elem.setAttributeNS(_257,_258,_259);
}else{
var _25a=elem.ownerDocument;
var _25b=_25a.createNode(2,_258,_257);
_25b.nodeValue=_259;
elem.setAttributeNode(_25b);
}
};
dojo.provide("dojo.undo.browser");
try{
if((!djConfig["preventBackButtonFix"])&&(!dojo.hostenv.post_load_)){
document.write("<iframe style='border: 0px; width: 1px; height: 1px; position: absolute; bottom: 0px; right: 0px; visibility: visible;' name='djhistory' id='djhistory' src='"+(dojo.hostenv.getBaseScriptUri()+"iframe_history.html")+"'></iframe>");
}
}
catch(e){
}
if(dojo.render.html.opera){
dojo.debug("Opera is not supported with dojo.undo.browser, so back/forward detection will not work.");
}
dojo.undo.browser={initialHref:(!dj_undef("window"))?window.location.href:"",initialHash:(!dj_undef("window"))?window.location.hash:"",moveForward:false,historyStack:[],forwardStack:[],historyIframe:null,bookmarkAnchor:null,locationTimer:null,setInitialState:function(args){
this.initialState=this._createState(this.initialHref,args,this.initialHash);
},addToHistory:function(args){
this.forwardStack=[];
var hash=null;
var url=null;
if(!this.historyIframe){
this.historyIframe=window.frames["djhistory"];
}
if(!this.bookmarkAnchor){
this.bookmarkAnchor=document.createElement("a");
dojo.body().appendChild(this.bookmarkAnchor);
this.bookmarkAnchor.style.display="none";
}
if(args["changeUrl"]){
hash="#"+((args["changeUrl"]!==true)?args["changeUrl"]:(new Date()).getTime());
if(this.historyStack.length==0&&this.initialState.urlHash==hash){
this.initialState=this._createState(url,args,hash);
return;
}else{
if(this.historyStack.length>0&&this.historyStack[this.historyStack.length-1].urlHash==hash){
this.historyStack[this.historyStack.length-1]=this._createState(url,args,hash);
return;
}
}
this.changingUrl=true;
setTimeout("window.location.href = '"+hash+"'; dojo.undo.browser.changingUrl = false;",1);
this.bookmarkAnchor.href=hash;
if(dojo.render.html.ie){
url=this._loadIframeHistory();
var _260=args["back"]||args["backButton"]||args["handle"];
var tcb=function(_262){
if(window.location.hash!=""){
setTimeout("window.location.href = '"+hash+"';",1);
}
_260.apply(this,[_262]);
};
if(args["back"]){
args.back=tcb;
}else{
if(args["backButton"]){
args.backButton=tcb;
}else{
if(args["handle"]){
args.handle=tcb;
}
}
}
var _263=args["forward"]||args["forwardButton"]||args["handle"];
var tfw=function(_265){
if(window.location.hash!=""){
window.location.href=hash;
}
if(_263){
_263.apply(this,[_265]);
}
};
if(args["forward"]){
args.forward=tfw;
}else{
if(args["forwardButton"]){
args.forwardButton=tfw;
}else{
if(args["handle"]){
args.handle=tfw;
}
}
}
}else{
if(dojo.render.html.moz){
if(!this.locationTimer){
this.locationTimer=setInterval("dojo.undo.browser.checkLocation();",200);
}
}
}
}else{
url=this._loadIframeHistory();
}
this.historyStack.push(this._createState(url,args,hash));
},checkLocation:function(){
if(!this.changingUrl){
var hsl=this.historyStack.length;
if((window.location.hash==this.initialHash||window.location.href==this.initialHref)&&(hsl==1)){
this.handleBackButton();
return;
}
if(this.forwardStack.length>0){
if(this.forwardStack[this.forwardStack.length-1].urlHash==window.location.hash){
this.handleForwardButton();
return;
}
}
if((hsl>=2)&&(this.historyStack[hsl-2])){
if(this.historyStack[hsl-2].urlHash==window.location.hash){
this.handleBackButton();
return;
}
}
}
},iframeLoaded:function(evt,_268){
if(!dojo.render.html.opera){
var _269=this._getUrlQuery(_268.href);
if(_269==null){
if(this.historyStack.length==1){
this.handleBackButton();
}
return;
}
if(this.moveForward){
this.moveForward=false;
return;
}
if(this.historyStack.length>=2&&_269==this._getUrlQuery(this.historyStack[this.historyStack.length-2].url)){
this.handleBackButton();
}else{
if(this.forwardStack.length>0&&_269==this._getUrlQuery(this.forwardStack[this.forwardStack.length-1].url)){
this.handleForwardButton();
}
}
}
},handleBackButton:function(){
var _26a=this.historyStack.pop();
if(!_26a){
return;
}
var last=this.historyStack[this.historyStack.length-1];
if(!last&&this.historyStack.length==0){
last=this.initialState;
}
if(last){
if(last.kwArgs["back"]){
last.kwArgs["back"]();
}else{
if(last.kwArgs["backButton"]){
last.kwArgs["backButton"]();
}else{
if(last.kwArgs["handle"]){
last.kwArgs.handle("back");
}
}
}
}
this.forwardStack.push(_26a);
},handleForwardButton:function(){
var last=this.forwardStack.pop();
if(!last){
return;
}
if(last.kwArgs["forward"]){
last.kwArgs.forward();
}else{
if(last.kwArgs["forwardButton"]){
last.kwArgs.forwardButton();
}else{
if(last.kwArgs["handle"]){
last.kwArgs.handle("forward");
}
}
}
this.historyStack.push(last);
},_createState:function(url,args,hash){
return {"url":url,"kwArgs":args,"urlHash":hash};
},_getUrlQuery:function(url){
var _271=url.split("?");
if(_271.length<2){
return null;
}else{
return _271[1];
}
},_loadIframeHistory:function(){
var url=dojo.hostenv.getBaseScriptUri()+"iframe_history.html?"+(new Date()).getTime();
this.moveForward=true;
dojo.io.setIFrameSrc(this.historyIframe,url,false);
return url;
}};
dojo.provide("dojo.io.BrowserIO");
if(!dj_undef("window")){
dojo.io.checkChildrenForFile=function(node){
var _274=false;
var _275=node.getElementsByTagName("input");
dojo.lang.forEach(_275,function(_276){
if(_274){
return;
}
if(_276.getAttribute("type")=="file"){
_274=true;
}
});
return _274;
};
dojo.io.formHasFile=function(_277){
return dojo.io.checkChildrenForFile(_277);
};
dojo.io.updateNode=function(node,_279){
node=dojo.byId(node);
var args=_279;
if(dojo.lang.isString(_279)){
args={url:_279};
}
args.mimetype="text/html";
args.load=function(t,d,e){
while(node.firstChild){
dojo.dom.destroyNode(node.firstChild);
}
node.innerHTML=d;
};
dojo.io.bind(args);
};
dojo.io.formFilter=function(node){
var type=(node.type||"").toLowerCase();
return !node.disabled&&node.name&&!dojo.lang.inArray(["file","submit","image","reset","button"],type);
};
dojo.io.encodeForm=function(_280,_281,_282){
if((!_280)||(!_280.tagName)||(!_280.tagName.toLowerCase()=="form")){
dojo.raise("Attempted to encode a non-form element.");
}
if(!_282){
_282=dojo.io.formFilter;
}
var enc=/utf/i.test(_281||"")?encodeURIComponent:dojo.string.encodeAscii;
var _284=[];
for(var i=0;i<_280.elements.length;i++){
var elm=_280.elements[i];
if(!elm||elm.tagName.toLowerCase()=="fieldset"||!_282(elm)){
continue;
}
var name=enc(elm.name);
var type=elm.type.toLowerCase();
if(type=="select-multiple"){
for(var j=0;j<elm.options.length;j++){
if(elm.options[j].selected){
_284.push(name+"="+enc(elm.options[j].value));
}
}
}else{
if(dojo.lang.inArray(["radio","checkbox"],type)){
if(elm.checked){
_284.push(name+"="+enc(elm.value));
}
}else{
_284.push(name+"="+enc(elm.value));
}
}
}
var _28a=_280.getElementsByTagName("input");
for(var i=0;i<_28a.length;i++){
var _28b=_28a[i];
if(_28b.type.toLowerCase()=="image"&&_28b.form==_280&&_282(_28b)){
var name=enc(_28b.name);
_284.push(name+"="+enc(_28b.value));
_284.push(name+".x=0");
_284.push(name+".y=0");
}
}
return _284.join("&")+"&";
};
dojo.io.FormBind=function(args){
this.bindArgs={};
if(args&&args.formNode){
this.init(args);
}else{
if(args){
this.init({formNode:args});
}
}
};
dojo.lang.extend(dojo.io.FormBind,{form:null,bindArgs:null,clickedButton:null,init:function(args){
var form=dojo.byId(args.formNode);
if(!form||!form.tagName||form.tagName.toLowerCase()!="form"){
throw new Error("FormBind: Couldn't apply, invalid form");
}else{
if(this.form==form){
return;
}else{
if(this.form){
throw new Error("FormBind: Already applied to a form");
}
}
}
dojo.lang.mixin(this.bindArgs,args);
this.form=form;
this.connect(form,"onsubmit","submit");
for(var i=0;i<form.elements.length;i++){
var node=form.elements[i];
if(node&&node.type&&dojo.lang.inArray(["submit","button"],node.type.toLowerCase())){
this.connect(node,"onclick","click");
}
}
var _291=form.getElementsByTagName("input");
for(var i=0;i<_291.length;i++){
var _292=_291[i];
if(_292.type.toLowerCase()=="image"&&_292.form==form){
this.connect(_292,"onclick","click");
}
}
},onSubmit:function(form){
return true;
},submit:function(e){
e.preventDefault();
if(this.onSubmit(this.form)){
dojo.io.bind(dojo.lang.mixin(this.bindArgs,{formFilter:dojo.lang.hitch(this,"formFilter")}));
}
},click:function(e){
var node=e.currentTarget;
if(node.disabled){
return;
}
this.clickedButton=node;
},formFilter:function(node){
var type=(node.type||"").toLowerCase();
var _299=false;
if(node.disabled||!node.name){
_299=false;
}else{
if(dojo.lang.inArray(["submit","button","image"],type)){
if(!this.clickedButton){
this.clickedButton=node;
}
_299=node==this.clickedButton;
}else{
_299=!dojo.lang.inArray(["file","submit","reset","button"],type);
}
}
return _299;
},connect:function(_29a,_29b,_29c){
if(dojo.evalObjPath("dojo.event.connect")){
dojo.event.connect(_29a,_29b,this,_29c);
}else{
var fcn=dojo.lang.hitch(this,_29c);
_29a[_29b]=function(e){
if(!e){
e=window.event;
}
if(!e.currentTarget){
e.currentTarget=e.srcElement;
}
if(!e.preventDefault){
e.preventDefault=function(){
window.event.returnValue=false;
};
}
fcn(e);
};
}
}});
dojo.io.XMLHTTPTransport=new function(){
var _29f=this;
var _2a0={};
this.useCache=false;
this.preventCache=false;
function getCacheKey(url,_2a2,_2a3){
return url+"|"+_2a2+"|"+_2a3.toLowerCase();
}
function addToCache(url,_2a5,_2a6,http){
_2a0[getCacheKey(url,_2a5,_2a6)]=http;
}
function getFromCache(url,_2a9,_2aa){
return _2a0[getCacheKey(url,_2a9,_2aa)];
}
this.clearCache=function(){
_2a0={};
};
function doLoad(_2ab,http,url,_2ae,_2af){
if(((http.status>=200)&&(http.status<300))||(http.status==304)||(location.protocol=="file:"&&(http.status==0||http.status==undefined))||(location.protocol=="chrome:"&&(http.status==0||http.status==undefined))){
var ret;
if(_2ab.method.toLowerCase()=="head"){
var _2b1=http.getAllResponseHeaders();
ret={};
ret.toString=function(){
return _2b1;
};
var _2b2=_2b1.split(/[\r\n]+/g);
for(var i=0;i<_2b2.length;i++){
var pair=_2b2[i].match(/^([^:]+)\s*:\s*(.+)$/i);
if(pair){
ret[pair[1]]=pair[2];
}
}
}else{
if(_2ab.mimetype=="text/javascript"){
try{
ret=dj_eval(http.responseText);
}
catch(e){
dojo.debug(e);
dojo.debug(http.responseText);
ret=null;
}
}else{
if(_2ab.mimetype=="text/json"||_2ab.mimetype=="application/json"){
try{
ret=dj_eval("("+http.responseText+")");
}
catch(e){
dojo.debug(e);
dojo.debug(http.responseText);
ret=false;
}
}else{
if((_2ab.mimetype=="application/xml")||(_2ab.mimetype=="text/xml")){
ret=http.responseXML;
if(!ret||typeof ret=="string"||!http.getResponseHeader("Content-Type")){
ret=dojo.dom.createDocumentFromText(http.responseText);
}
}else{
ret=http.responseText;
}
}
}
}
if(_2af){
addToCache(url,_2ae,_2ab.method,http);
}
_2ab[(typeof _2ab.load=="function")?"load":"handle"]("load",ret,http,_2ab);
}else{
var _2b5=new dojo.io.Error("XMLHttpTransport Error: "+http.status+" "+http.statusText);
_2ab[(typeof _2ab.error=="function")?"error":"handle"]("error",_2b5,http,_2ab);
}
}
function setHeaders(http,_2b7){
if(_2b7["headers"]){
for(var _2b8 in _2b7["headers"]){
if(_2b8.toLowerCase()=="content-type"&&!_2b7["contentType"]){
_2b7["contentType"]=_2b7["headers"][_2b8];
}else{
http.setRequestHeader(_2b8,_2b7["headers"][_2b8]);
}
}
}
}
this.inFlight=[];
this.inFlightTimer=null;
this.startWatchingInFlight=function(){
if(!this.inFlightTimer){
this.inFlightTimer=setTimeout("dojo.io.XMLHTTPTransport.watchInFlight();",10);
}
};
this.watchInFlight=function(){
var now=null;
if(!dojo.hostenv._blockAsync&&!_29f._blockAsync){
for(var x=this.inFlight.length-1;x>=0;x--){
try{
var tif=this.inFlight[x];
if(!tif||tif.http._aborted||!tif.http.readyState){
this.inFlight.splice(x,1);
continue;
}
if(4==tif.http.readyState){
this.inFlight.splice(x,1);
doLoad(tif.req,tif.http,tif.url,tif.query,tif.useCache);
}else{
if(tif.startTime){
if(!now){
now=(new Date()).getTime();
}
if(tif.startTime+(tif.req.timeoutSeconds*1000)<now){
if(typeof tif.http.abort=="function"){
tif.http.abort();
}
this.inFlight.splice(x,1);
tif.req[(typeof tif.req.timeout=="function")?"timeout":"handle"]("timeout",null,tif.http,tif.req);
}
}
}
}
catch(e){
try{
var _2bc=new dojo.io.Error("XMLHttpTransport.watchInFlight Error: "+e);
tif.req[(typeof tif.req.error=="function")?"error":"handle"]("error",_2bc,tif.http,tif.req);
}
catch(e2){
dojo.debug("XMLHttpTransport error callback failed: "+e2);
}
}
}
}
clearTimeout(this.inFlightTimer);
if(this.inFlight.length==0){
this.inFlightTimer=null;
return;
}
this.inFlightTimer=setTimeout("dojo.io.XMLHTTPTransport.watchInFlight();",10);
};
var _2bd=dojo.hostenv.getXmlhttpObject()?true:false;
this.canHandle=function(_2be){
return _2bd&&dojo.lang.inArray(["text/plain","text/html","application/xml","text/xml","text/javascript","text/json","application/json"],(_2be["mimetype"].toLowerCase()||""))&&!(_2be["formNode"]&&dojo.io.formHasFile(_2be["formNode"]));
};
this.multipartBoundary="45309FFF-BD65-4d50-99C9-36986896A96F";
this.bind=function(_2bf){
if(!_2bf["url"]){
if(!_2bf["formNode"]&&(_2bf["backButton"]||_2bf["back"]||_2bf["changeUrl"]||_2bf["watchForURL"])&&(!djConfig.preventBackButtonFix)){
dojo.deprecated("Using dojo.io.XMLHTTPTransport.bind() to add to browser history without doing an IO request","Use dojo.undo.browser.addToHistory() instead.","0.4");
dojo.undo.browser.addToHistory(_2bf);
return true;
}
}
var url=_2bf.url;
var _2c1="";
if(_2bf["formNode"]){
var ta=_2bf.formNode.getAttribute("action");
if((ta)&&(!_2bf["url"])){
url=ta;
}
var tp=_2bf.formNode.getAttribute("method");
if((tp)&&(!_2bf["method"])){
_2bf.method=tp;
}
_2c1+=dojo.io.encodeForm(_2bf.formNode,_2bf.encoding,_2bf["formFilter"]);
}
if(url.indexOf("#")>-1){
dojo.debug("Warning: dojo.io.bind: stripping hash values from url:",url);
url=url.split("#")[0];
}
if(_2bf["file"]){
_2bf.method="post";
}
if(!_2bf["method"]){
_2bf.method="get";
}
if(_2bf.method.toLowerCase()=="get"){
_2bf.multipart=false;
}else{
if(_2bf["file"]){
_2bf.multipart=true;
}else{
if(!_2bf["multipart"]){
_2bf.multipart=false;
}
}
}
if(_2bf["backButton"]||_2bf["back"]||_2bf["changeUrl"]){
dojo.undo.browser.addToHistory(_2bf);
}
var _2c4=_2bf["content"]||{};
if(_2bf.sendTransport){
_2c4["dojo.transport"]="xmlhttp";
}
do{
if(_2bf.postContent){
_2c1=_2bf.postContent;
break;
}
if(_2c4){
_2c1+=dojo.io.argsFromMap(_2c4,_2bf.encoding);
}
if(_2bf.method.toLowerCase()=="get"||!_2bf.multipart){
break;
}
var t=[];
if(_2c1.length){
var q=_2c1.split("&");
for(var i=0;i<q.length;++i){
if(q[i].length){
var p=q[i].split("=");
t.push("--"+this.multipart