1/** 2 * JsHttpRequest: JavaScript "AJAX" data loader (script support only!) 3 * Minimized version: see debug directory for the complete one. 4 * 5 * @license LGPL 6 * @author Dmitry Koterov, http://en.dklab.ru/lib/JsHttpRequest/ 7 * @version 5.x $Id$ 8 */ 9function JsHttpRequest(){ 10var t=this; 11t.onreadystatechange=null; 12t.readyState=0; 13t.responseText=null; 14t.responseXML=null; 15t.status=200; 16t.statusText="OK"; 17t.responseJS=null; 18t.caching=false; 19t.loader=null; 20t.session_name="PHPSESSID"; 21t._ldObj=null; 22t._reqHeaders=[]; 23t._openArgs=null; 24t._errors={inv_form_el:"Invalid FORM element detected: name=%, tag=%",must_be_single_el:"If used, <form> must be a single HTML element in the list.",js_invalid:"JavaScript code generated by backend is invalid!\n%",url_too_long:"Cannot use so long query with GET request (URL is larger than % bytes)",unk_loader:"Unknown loader: %",no_loaders:"No loaders registered at all, please check JsHttpRequest.LOADERS array",no_loader_matched:"Cannot find a loader which may process the request. Notices are:\n%",no_headers:"Method setRequestHeader() cannot work together with the % loader."}; 25t.abort=function(){ 26with(this){ 27if(_ldObj&&_ldObj.abort){ 28_ldObj.abort(); 29} 30_cleanup(); 31if(readyState==0){ 32return; 33} 34if(readyState==1&&!_ldObj){ 35readyState=0; 36return; 37} 38_changeReadyState(4,true); 39} 40}; 41t.open=function(_2,_3,_4,_5,_6){ 42with(this){ 43try{ 44if(document.location.search.match(new RegExp("[&?]"+session_name+"=([^&?]*)"))||document.cookie.match(new RegExp("(?:;|^)\\s*"+session_name+"=([^;]*)"))){ 45_3+=(_3.indexOf("?")>=0?"&":"?")+session_name+"="+this.escape(RegExp.$1); 46} 47} 48catch(e){ 49} 50_openArgs={method:(_2||"").toUpperCase(),url:_3,asyncFlag:_4,username:_5!=null?_5:"",password:_6!=null?_6:""}; 51_ldObj=null; 52_changeReadyState(1,true); 53return true; 54} 55}; 56t.send=function(_7){ 57if(!this.readyState){ 58return; 59} 60this._changeReadyState(1,true); 61this._ldObj=null; 62var _8=[]; 63var _9=[]; 64if(!this._hash2query(_7,null,_8,_9)){ 65return; 66} 67var _a=null; 68if(this.caching&&!_9.length){ 69_a=this._openArgs.username+":"+this._openArgs.password+"@"+this._openArgs.url+"|"+_8+"#"+this._openArgs.method; 70var _b=JsHttpRequest.CACHE[_a]; 71if(_b){ 72this._dataReady(_b[0],_b[1]); 73return false; 74} 75} 76var _c=(this.loader||"").toLowerCase(); 77if(_c&&!JsHttpRequest.LOADERS[_c]){ 78return this._error("unk_loader",_c); 79} 80var _d=[]; 81var _e=JsHttpRequest.LOADERS; 82for(var _f in _e){ 83var ldr=_e[_f].loader; 84if(!ldr){ 85continue; 86} 87if(_c&&_f!=_c){ 88continue; 89} 90var _11=new ldr(this); 91JsHttpRequest.extend(_11,this._openArgs); 92JsHttpRequest.extend(_11,{queryText:_8.join("&"),queryElem:_9,id:(new Date().getTime())+""+JsHttpRequest.COUNT++,hash:_a,span:null}); 93var _12=_11.load(); 94if(!_12){ 95this._ldObj=_11; 96JsHttpRequest.PENDING[_11.id]=this; 97return true; 98} 99if(!_c){ 100_d[_d.length]="- "+_f.toUpperCase()+": "+this._l(_12); 101}else{ 102return this._error(_12); 103} 104} 105return _f?this._error("no_loader_matched",_d.join("\n")):this._error("no_loaders"); 106}; 107t.getAllResponseHeaders=function(){ 108with(this){ 109return _ldObj&&_ldObj.getAllResponseHeaders?_ldObj.getAllResponseHeaders():[]; 110} 111}; 112t.getResponseHeader=function(_13){ 113with(this){ 114return _ldObj&&_ldObj.getResponseHeader?_ldObj.getResponseHeader():[]; 115} 116}; 117t.setRequestHeader=function(_14,_15){ 118with(this){ 119_reqHeaders[_reqHeaders.length]=[_14,_15]; 120} 121}; 122t._dataReady=function(_16,js){ 123with(this){ 124if(caching&&_ldObj){ 125JsHttpRequest.CACHE[_ldObj.hash]=[_16,js]; 126} 127if(_16!==null||js!==null){ 128status=4; 129responseText=responseXML=_16; 130responseJS=js; 131}else{ 132status=500; 133responseText=responseXML=responseJS=null; 134} 135_changeReadyState(2); 136_changeReadyState(3); 137_changeReadyState(4); 138_cleanup(); 139} 140}; 141t._l=function(_18){ 142var i=0,p=0,msg=this._errors[_18[0]]; 143while((p=msg.indexOf("%",p))>=0){ 144var a=_18[++i]+""; 145msg=msg.substring(0,p)+a+msg.substring(p+1,msg.length); 146p+=1+a.length; 147} 148return msg; 149}; 150t._error=function(msg){ 151msg=this._l(typeof (msg)=="string"?arguments:msg); 152msg="JsHttpRequest: "+msg; 153if(!window.Error){ 154throw msg; 155}else{ 156if((new Error(1,"test")).description=="test"){ 157throw new Error(1,msg); 158}else{ 159throw new Error(msg); 160} 161} 162}; 163t._hash2query=function(_1e,_1f,_20,_21){ 164if(_1f==null){ 165_1f=""; 166} 167if((""+typeof (_1e)).toLowerCase()=="object"){ 168var _22=false; 169if(_1e&&_1e.parentNode&&_1e.parentNode.appendChild&&_1e.tagName&&_1e.tagName.toUpperCase()=="FORM"){ 170_1e={form:_1e}; 171} 172for(var k in _1e){ 173var v=_1e[k]; 174if(v instanceof Function){ 175continue; 176} 177var _25=_1f?_1f+"["+this.escape(k)+"]":this.escape(k); 178var _26=v&&v.parentNode&&v.parentNode.appendChild&&v.tagName; 179if(_26){ 180var tn=v.tagName.toUpperCase(); 181if(tn=="FORM"){ 182_22=true; 183}else{ 184if(tn=="INPUT"||tn=="TEXTAREA"||tn=="SELECT"){ 185}else{ 186return this._error("inv_form_el",(v.name||""),v.tagName); 187} 188} 189_21[_21.length]={name:_25,e:v}; 190}else{ 191if(v instanceof Object){ 192this._hash2query(v,_25,_20,_21); 193}else{ 194if(v===null){ 195continue; 196} 197_20[_20.length]=_25+"="+this.escape(""+v); 198} 199} 200if(_22&&_21.length>1){ 201return this._error("must_be_single_el"); 202} 203} 204}else{ 205_20[_20.length]=_1e; 206} 207return true; 208}; 209t._cleanup=function(){ 210var _28=this._ldObj; 211if(!_28){ 212return; 213} 214JsHttpRequest.PENDING[_28.id]=false; 215var _29=_28.span; 216if(!_29){ 217return; 218} 219_28.span=null; 220var _2a=function(){ 221_29.parentNode.removeChild(_29); 222}; 223JsHttpRequest.setTimeout(_2a,50); 224}; 225t._changeReadyState=function(s,_2c){ 226with(this){ 227if(_2c){ 228status=statusText=responseJS=null; 229responseText=""; 230} 231readyState=s; 232if(onreadystatechange){ 233onreadystatechange(); 234} 235} 236}; 237t.escape=function(s){ 238return escape(s).replace(new RegExp("\\+","g"),"%2B"); 239}; 240} 241JsHttpRequest.COUNT=0; 242JsHttpRequest.MAX_URL_LEN=2000; 243JsHttpRequest.CACHE={}; 244JsHttpRequest.PENDING={}; 245JsHttpRequest.LOADERS={}; 246JsHttpRequest._dummy=function(){ 247}; 248JsHttpRequest.TIMEOUTS={s:window.setTimeout,c:window.clearTimeout}; 249JsHttpRequest.setTimeout=function(_2e,dt){ 250window.JsHttpRequest_tmp=JsHttpRequest.TIMEOUTS.s; 251if(typeof (_2e)=="string"){ 252id=window.JsHttpRequest_tmp(_2e,dt); 253}else{ 254var id=null; 255var _31=function(){ 256_2e(); 257delete JsHttpRequest.TIMEOUTS[id]; 258}; 259id=window.JsHttpRequest_tmp(_31,dt); 260JsHttpRequest.TIMEOUTS[id]=_31; 261} 262window.JsHttpRequest_tmp=null; 263return id; 264}; 265JsHttpRequest.clearTimeout=function(id){ 266window.JsHttpRequest_tmp=JsHttpRequest.TIMEOUTS.c; 267delete JsHttpRequest.TIMEOUTS[id]; 268var r=window.JsHttpRequest_tmp(id); 269window.JsHttpRequest_tmp=null; 270return r; 271}; 272JsHttpRequest.query=function(url,_35,_36,_37){ 273var req=new this(); 274req.caching=!_37; 275req.onreadystatechange=function(){ 276if(req.readyState==4){ 277_36(req.responseJS,req.responseText); 278} 279}; 280var _39=null; 281if(url.match(/^((\w+)\.)?(GET|POST)\s+(.*)/i)){ 282req.loader=RegExp.$2?RegExp.$2:null; 283_39=RegExp.$3; 284url=RegExp.$4; 285} 286req.open(_39,url,true); 287req.send(_35); 288}; 289JsHttpRequest.dataReady=function(d){ 290var th=this.PENDING[d.id]; 291delete this.PENDING[d.id]; 292if(th){ 293th._dataReady(d.text,d.js); 294}else{ 295if(th!==false){ 296throw "dataReady(): unknown pending id: "+d.id; 297} 298} 299}; 300JsHttpRequest.extend=function(_3c,src){ 301for(var k in src){ 302_3c[k]=src[k]; 303} 304}; 305JsHttpRequest.LOADERS.script={loader:function(req){ 306JsHttpRequest.extend(req._errors,{script_only_get:"Cannot use SCRIPT loader: it supports only GET method",script_no_form:"Cannot use SCRIPT loader: direct form elements using and uploading are not implemented"}); 307this.load=function(){ 308if(this.queryText){ 309this.url+=(this.url.indexOf("?")>=0?"&":"?")+this.queryText; 310} 311this.url+=(this.url.indexOf("?")>=0?"&":"?")+"JsHttpRequest="+this.id+"-"+"script"; 312this.queryText=""; 313if(!this.method){ 314this.method="GET"; 315} 316if(this.method!=="GET"){ 317return ["script_only_get"]; 318} 319if(this.queryElem.length){ 320return ["script_no_form"]; 321} 322if(this.url.length>JsHttpRequest.MAX_URL_LEN){ 323return ["url_too_long",JsHttpRequest.MAX_URL_LEN]; 324} 325if(req._reqHeaders.length){ 326return ["no_headers","SCRIPT"]; 327} 328var th=this,d=document,s=null,b=d.body; 329if(!window.opera){ 330this.span=s=d.createElement("SCRIPT"); 331var _44=function(){ 332s.language="JavaScript"; 333if(s.setAttribute){ 334s.setAttribute("src",th.url); 335}else{ 336s.src=th.url; 337} 338b.insertBefore(s,b.lastChild); 339}; 340}else{ 341this.span=s=d.createElement("SPAN"); 342s.style.display="none"; 343b.insertBefore(s,b.lastChild); 344s.innerHTML="Workaround for IE.<s"+"cript></"+"script>"; 345var _44=function(){ 346s=s.getElementsByTagName("SCRIPT")[0]; 347s.language="JavaScript"; 348if(s.setAttribute){ 349s.setAttribute("src",th.url); 350}else{ 351s.src=th.url; 352} 353}; 354} 355JsHttpRequest.setTimeout(_44,10); 356return null; 357}; 358}}; 359 360