151 lines
2.8 KiB
JavaScript
151 lines
2.8 KiB
JavaScript
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/*
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* xhr.js - XMLHttpRequest helper class
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* (c) 2008-2010 Jo-Philipp Wich
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*/
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XHR = function()
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{
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this.reinit = function()
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{
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if( window.XMLHttpRequest ) {
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this._xmlHttp = new XMLHttpRequest();
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}
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else if( window.ActiveXObject ) {
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this._xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
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}
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else {
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alert("xhr.js: XMLHttpRequest is not supported by this browser!");
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}
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}
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this.busy = function() {
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switch( this._xmlHttp.readyState )
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{
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case 1:
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case 2:
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case 3:
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return true;
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default:
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return false;
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}
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}
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this.abort = function() {
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if( this.busy() )
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this._xmlHttp.abort();
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}
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this.get = function(url,data,callback)
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{
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this.reinit();
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var xhr = this._xmlHttp;
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var code = this._encode( data );
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url = 'http://' + location.hostname +
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( location.port ? ':' + location.port : '' ) + url;
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if( code )
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if( url.substr(url.length-1,1) == '&' )
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url += code;
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else
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url += '?' + code;
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xhr.open( 'GET', url, true );
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xhr.onreadystatechange = function()
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{
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if( xhr.readyState == 4 ) {
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callback( xhr );
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}
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}
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xhr.send( null );
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}
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this.post = function(url,data,callback)
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{
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this.reinit();
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var xhr = this._xmlHttp;
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var code = this._encode( data );
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xhr.onreadystatechange = function()
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{
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if( xhr.readyState == 4 )
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callback( xhr );
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}
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xhr.open( 'POST', url, true );
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xhr.setRequestHeader( 'Content-type', 'application/x-www-form-urlencoded' );
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xhr.setRequestHeader( 'Content-length', code.length );
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xhr.setRequestHeader( 'Connection', 'close' );
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xhr.send( code );
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}
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this.cancel = function()
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{
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this._xmlHttp.onreadystatechange = function(){};
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this._xmlHttp.abort();
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}
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this.send_form = function(form,callback,extra_values)
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{
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var code = '';
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for( var i = 0; i < form.elements.length; i++ )
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{
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var e = form.elements[i];
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if( e.options )
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{
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code += ( code ? '&' : '' ) +
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form.elements[i].name + '=' + encodeURIComponent(
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e.options[e.selectedIndex].value
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);
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}
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else if( e.length )
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{
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for( var j = 0; j < e.length; j++ )
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if( e[j].name ) {
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code += ( code ? '&' : '' ) +
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e[j].name + '=' + encodeURIComponent( e[j].value );
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}
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}
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else
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{
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code += ( code ? '&' : '' ) +
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e.name + '=' + encodeURIComponent( e.value );
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}
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}
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if( typeof extra_values == 'object' )
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for( var key in extra_values )
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code += ( code ? '&' : '' ) +
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key + '=' + encodeURIComponent( extra_values[key] );
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return(
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( form.method == 'get' )
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? this.get( form.getAttribute('action'), code, callback )
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: this.post( form.getAttribute('action'), code, callback )
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);
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}
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this._encode = function(obj)
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{
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if( typeof obj == 'object' )
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{
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var code = '';
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var self = this;
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for( var k in obj )
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code += ( code ? '&' : '' ) +
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k + '=' + encodeURIComponent( obj[k] );
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return code;
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}
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return obj;
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}
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}
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