本次的Ajax框架代码中没有关于实现浏览器前进、后退按钮的处理,如果各位需要,可以从我原来的文章中获取相应的代码。
声明:本文中的所有代码遵守GNU GPLv2的协议,对代码进行开源
发行注记:
2009/06/22
1、取消很多不必要的参数
2、代码风格更加面向对象
3、允许用户对request请求方式进行设置(即用户可以选择同步或异步执行Ajax请求)
4、框架使用闭包封装
5、改进了程序的执行性能
JavaScript代码中提供了两个Demo函数,分别是使用同步、异步对同一个URL进行多次请求。
如果各位对这套框架有什么意见或建议,可以直接联系我,在代码的版权信息内,有本人的电子邮件地址
/*
* Copyright © 2008 Nervous Studio, All rights reserved.
*
* LICENSE
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License (GPL)
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* To read the license please visit http://www.gnu.org/copyleft/gpl.html
*
*/
/*
* @author Steven Wee
* @E-Mail:wmkm0113@Hotmail.comweimin0528@139.com
* @version $Revision: 1.1 $ $Date: 2009/06/21 4:40:00 $
*/
// Get Elements by input elementId
function $() {
if ( arguments.length <= 0 ) {
return null;
} else {
var returnElements = new Array();
var argCount = arguments.length;
for ( var i = 0 ; i < argCount ; i++ ) {
var element = null;
var elementId = arguments[i];
if ( typeof elementId == 'string' ) {
element = document.getElementById(elementId);
}
if ( element != null ) {
returnElements.push(element);
}
}
return returnElements;
}
}
// Trim the string spaces at begin and end
function trim(str){
return str.replace(/(^\s*)|(\s*$)/g, "");
}
function AjaxObject() {
// Define url address varibale
var url = null;
// Define formId varibale
var formId = null;
// Define bindElementId varibale
var bindElementId = null;
// Define XMLHTTPRequest object varibale
var request = getAjaxObject();
function setURL(urlAddress) {
this.url = urlAddress;
}
function getURL() {
return this.url;
}
function setFormId(inputFormId) {
this.formId = inputFormId;
}
function getFormId() {
return this.formId;
}
function setBindElementId(elementId) {
this.bindElementId = elementId;
}
function getBindElementId() {
return this.bindElementId;
}
/*
* Get XMLHttpRequest object
*/
function getAjaxObject() {
var xmlHttpRequest;
// If XMLHttpRequest is a javascript object in the local
if(window.XMLHttpRequest){
xmlHttpRequest = new XMLHttpRequest();
}else if(window.ActiveXObject){ // Support the ActiveX
try{
// Create XMLHttpRequest object by instance an ActiveXObject
xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP"); // higher than msxml3
}catch(e){
try{
// Create XMLHttpRequest object by instance an ActiveXObject
xmlHttpRequest = new ActiveXObject("Msxml2.XMLHTTP"); // lower than msxml3
}catch(e){}
}
}
if ( !xmlHttpRequest ) {
alert("Create Ajax object failed!");
}
return xmlHttpRequest;
}
/*
* Send client request by ajax
* Support 'POST' and 'GET' to submit the form
* Support Asynchronous or Synchronous to send the ajax request
*/
function sendRequestByAjax(syncOption, sendOption) {
if ( typeof syncOption == "string" && syncOption.toUpperCase() == "POST" ) {
request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
}
if ( sendOption ) {
request.onreadystatechange = processRequest;
}
request.open(syncOption, this.url, sendOption);
var data = null;
// Format form data
if ( this.formId && this.formId.length != 0 ) {
var formElement = $(this.formId)[0];
data = encodeFormData(formElement);
}
request.send(data);
}
/*
* Ajax callback function when Synchronous
*/
function processRequest() {
if( request.readyState == 4 ){
// Receive the request data finished
if( request.status == 200 ){
// Received data success
if ( request.responseXML.documentElement != null ) {
var xmlDoc = request.responseXML.documentElement;
var xmlRoot = xmlDoc.getElementsByTagName("dataType");
var dataType = xmlRoot[0].childNodes[0].firstChild.nodeValue;
var items = xmlDoc.getElementsByTagName('item');
switch ( dataType.toLowerCase() ) {
case "array" :
// Return value is resultSet
bindItems(items);
break;
case "string" :
// Return value is string
bindText(items[0].childNodes[0].firstChild.nodeValue);
}
} else {
var htmlCode = request.responseText;
bindText(htmlCode);
}
} else {
// Received data error
alert("Not able to retrieve description " + request.statusText);
}
}
}
/*
* Ajax callback function when Synchronous
*/
function processRequestWhenSync() {
if ( request.responseXML.documentElement != null ) {
var xmlDoc = request.responseXML.documentElement;
var xmlRoot = xmlDoc.getElementsByTagName("dataType");
var dataType = xmlRoot[0].childNodes[0].firstChild.nodeValue;
var items = xmlDoc.getElementsByTagName('item');
switch ( dataType.toLowerCase() ) {
case "array" :
// Return value is resultSet
bindItems(items);
break;
case "string" :
// Return value is string
bindText(items[0].childNodes[0].firstChild.nodeValue);
}
} else {
var htmlCode = request.responseText;
bindText(htmlCode);
}
}
// Send request by ajax as Synchronous and medthod is GET
function getWithSync() {
sendRequestByAjax("GET", false);
// Operate request data
processRequestWhenSync();
}
// Send request by ajax as Asynchronous and medthod is GET
function getWithAsync() {
sendRequestByAjax("GET", true);
}
// Send request by ajax as Synchronous and medthod is POST
function postWithSync() {
sendRequestByAjax("POST", false);
// Operate request data
processRequestWhenSync();
}
// Send request by ajax as Asynchronous and medthod is POST
function postWithAsync() {
sendRequestByAjax("POST", true);
}
/*
* Analyze form elements data
* @param formElement FormObject
*/
function encodeFormData(formElement) {
var whereClause = "";
var and = "";
var elementCount = formElement.length;
for ( i = 0 ; i < elementCount ; i++ ) {
var element = formElement[i];
if ( element.name != "" ) {
if (element.type=='select-one') {
element_value = element.options[element.selectedIndex].value;
} else if ( element.type == 'checkbox' || element.type == 'radio' ) {
if ( element.checked == false ) {
break;
}
element_value = trim(element.value);
} else {
element_value = trim(element.value);
}
whereClause += and + trim(element.name) + '=' + element_value.replace(/\&/g,"%26");
and = "&"
}
}
return whereClause;
}
/*
* Bind text value
*/
function bindText(value) {
var elem = $(this.bindElementId)[0];
// Analyze object classification
switch ( elem.tagName.toLowerCase() ) {
case "div":
case "span":
case "textarea":
elem.innerHTML += value;
break;
case "input":
elem.value = value;
break;
default:
alert("Can't bind data to element!");
return false;
}
return true;
}
/*
* Bind resultSet
*/
function bindItems(items) {
var elem = $(this.bindElementId)[0];
// Check the bind object is support
if ( elem.tagName.toLowerCase() != "select" && elem.tagName.toLowerCase() != "ul" ) {
alert("Can't bind data to element!");
return;
}
// Bind data to select
if ( elem.tagName.toLowerCase() == "select" ) {
var childCount = elem.childNodes.length;
while ( childCount > 0 ) {
// Clear all values when the values is exists
elem.removeChild(elem.childNodes[0]);
childCount--;
}
// Bind data
var itemCount = items.length;
for ( var i = 0; i < itemCount; i++ ) {
var option = document.createElement("OPTION");
var Data = items[i];
option.value = Data.childNodes[0].firstChild.nodeValue;
option.text = Data.childNodes[1].firstChild.nodeValue;
elem.options.add(option);
}
} else if ( elem.tagName.toLowerCase() == "ul" ) {
// Bind data to ul
elem.innerHTML = "";
// bind data
var itemCount = items.length;
for ( var i = 0; i < itemCount; i++ ) {
var Data = items[i];
var urlAddress = Data.childNodes[0].firstChild.nodeValue;
var showText = Data.childNodes[1].firstChild.nodeValue;
var innerCode = "
+ urlAddress + "\" title=\"" + showText + "\">" + showText + "";
elem.innerHTML += innerCode;
}
}
return true;
}
/*
* Submit form as Ajax
* @param syncStatus: true-Send ajax request by Asynchronous false-Send ajax request by Synchronous
* @param formId: the id is where form will submit
* @param elementId: the return value will bind for this element
*
*/
this.submitForm = function(syncStatus, formId, elementId) {
var formElement = $(formId)[0];
if ( formElement ) {
setURL(formElement.getAttributeNode("action").value);
setFormId(formId);
setBindElementId(elementId);
if ( syncStatus ) {
if ( formElement.medthod.toUpperCase() == "POST" ) {
postWithSync();
} else if ( formElement.medthod.toUpperCase() == "GET" ) {
getWithSync();
} else {
alert("Form medthod was not support! The form medthod is: " + formElement.medthod);
}
} else {
if ( formElement.medthod.toUpperCase() == "POST" ) {
postWithAsync();
} else if ( formElement.medthod.toUpperCase() == "GET" ) {
getWithAsync();
} else {
alert("Form medthod was not support! The form medthod is: " + formElement.medthod);
}
}
} else {
alert("Form is undefined!");
}
}
/*
* Get url address data as Ajax
* @param syncStatus: true-Send ajax request by Asynchronous false-Send ajax request by Synchronous
* @param urlAddress: the request url
* @param elementId: the return value will bind for this element
*
*/
this.getData = function(syncStatus, urlAddress, elementId) {
setURL(urlAddress);
setBindElementId(elementId);
if ( syncStatus ) {
getWithAsync();
} else {
getWithSync();
}
}
}
// Demo for request more times
function testRequestAsync() {
/*
* request by Asynchronous
*/
var ajaxRequest = new AjaxObject();
var count = 10;
var i = 0;
while( i < count ) {
ajaxRequest.getData(false, "http://www.google.com/", "test");
i++;
}
}
// Demo for request more times
function testRequestSync() {
/*
* request by Synchronous
*/
var count = 10;
var i = 0;
while( i < count ) {
var ajaxRequest = new AjaxObject();
ajaxRequest.getData(false, "http://www.google.com/", "test");
i++;
}
}
- 1.
- 2.
- 3.
- 4.
- 5.
- 6.
- 7.
- 8.
- 9.
- 10.
- 11.
- 12.
- 13.
- 14.
- 15.
- 16.
- 17.
- 18.
- 19.
- 20.
- 21.
- 22.
- 23.
- 24.
- 25.
- 26.
- 27.
- 28.
- 29.
- 30.
- 31.
- 32.
- 33.
- 34.
- 35.
- 36.
- 37.
- 38.
- 39.
- 40.
- 41.
- 42.
- 43.
- 44.
- 45.
- 46.
- 47.
- 48.
- 49.
- 50.
- 51.
- 52.
- 53.
- 54.
- 55.
- 56.
- 57.
- 58.
- 59.
- 60.
- 61.
- 62.
- 63.
- 64.
- 65.
- 66.
- 67.
- 68.
- 69.
- 70.
- 71.
- 72.
- 73.
- 74.
- 75.
- 76.
- 77.
- 78.
- 79.
- 80.
- 81.
- 82.
- 83.
- 84.
- 85.
- 86.
- 87.
- 88.
- 89.
- 90.
- 91.
- 92.
- 93.
- 94.
- 95.
- 96.
- 97.
- 98.
- 99.
- 100.
- 101.
- 102.
- 103.
- 104.
- 105.
- 106.
- 107.
- 108.
- 109.
- 110.
- 111.
- 112.
- 113.
- 114.
- 115.
- 116.
- 117.
- 118.
- 119.
- 120.
- 121.
- 122.
- 123.
- 124.
- 125.
- 126.
- 127.
- 128.
- 129.
- 130.
- 131.
- 132.
- 133.
- 134.
- 135.
- 136.
- 137.
- 138.
- 139.
- 140.
- 141.
- 142.
- 143.
- 144.
- 145.
- 146.
- 147.
- 148.
- 149.
- 150.
- 151.
- 152.
- 153.
- 154.
- 155.
- 156.
- 157.
- 158.
- 159.
- 160.
- 161.
- 162.
- 163.
- 164.
- 165.
- 166.
- 167.
- 168.
- 169.
- 170.
- 171.
- 172.
- 173.
- 174.
- 175.
- 176.
- 177.
- 178.
- 179.
- 180.
- 181.
- 182.
- 183.
- 184.
- 185.
- 186.
- 187.
- 188.
- 189.
- 190.
- 191.
- 192.
- 193.
- 194.
- 195.
- 196.
- 197.
- 198.
- 199.
- 200.
- 201.
- 202.
- 203.
- 204.
- 205.
- 206.
- 207.
- 208.
- 209.
- 210.
- 211.
- 212.
- 213.
- 214.
- 215.
- 216.
- 217.
- 218.
- 219.
- 220.
- 221.
- 222.
- 223.
- 224.
- 225.
- 226.
- 227.
- 228.
- 229.
- 230.
- 231.
- 232.
- 233.
- 234.
- 235.
- 236.
- 237.
- 238.
- 239.
- 240.
- 241.
- 242.
- 243.
- 244.
- 245.
- 246.
- 247.
- 248.
- 249.
- 250.
- 251.
- 252.
- 253.
- 254.
- 255.
- 256.
- 257.
- 258.
- 259.
- 260.
- 261.
- 262.
- 263.
- 264.
- 265.
- 266.
- 267.
- 268.
- 269.
- 270.
- 271.
- 272.
- 273.
- 274.
- 275.
- 276.
- 277.
- 278.
- 279.
- 280.
- 281.
- 282.
- 283.
- 284.
- 285.
- 286.
- 287.
- 288.
- 289.
- 290.
- 291.
- 292.
- 293.
- 294.
- 295.
- 296.
- 297.
- 298.
- 299.
- 300.
- 301.
- 302.
- 303.
- 304.
- 305.
- 306.
- 307.
- 308.
- 309.
- 310.
- 311.
- 312.
- 313.
- 314.
- 315.
- 316.
- 317.
- 318.
- 319.
- 320.
- 321.
- 322.
- 323.
- 324.
- 325.
- 326.
- 327.
- 328.
- 329.
- 330.
- 331.
- 332.
- 333.
- 334.
- 335.
- 336.
- 337.
- 338.
- 339.
- 340.
- 341.
- 342.
- 343.
- 344.
- 345.
- 346.
- 347.
- 348.
- 349.
- 350.
- 351.
- 352.
- 353.
- 354.
- 355.
- 356.
- 357.
- 358.
- 359.
- 360.
- 361.
- 362.
- 363.
- 364.
- 365.
- 366.
- 367.
- 368.
- 369.
- 370.
- 371.
- 372.
- 373.
- 374.
- 375.
- 376.
- 377.
- 378.
- 379.
- 380.
- 381.
- 382.
- 383.
- 384.
- 385.
- 386.
- 387.
- 388.
- 389.
- 390.
- 391.
- 392.
- 393.
以上就是这个通用Ajax框架的源代码。本文出自 “玄武·巴依” 博客。
【编辑推荐】