当前位置: 首页 > 图文教程 > 网络编程 > PHP > DISCUZ架构:AJAX之ajax.js 函数之一

PHP
PHP 执行系统外部命令 system() exec() passthru()
最新的php 文件上传模型，支持多文件上传
php 静态页面中显示动态内容
数据库查询记录php 多行多列显示
谈PHP生成静态页面分析 模板+缓存+写文件
PHP 各种排序算法实现代码
PHP nl2br函数 将换行字符转成 <br>
php 分页原理详解
Discuz 模板语句分析及知识技巧
php win下Socket方式发邮件类
怎样去阅读一份php源代码
建站常用13种PHP开源CMS比较
php xml留言板 xml存储数据的简单例子
PHP 开源AJAX框架14种
PHP 替换模板变量实现步骤
PHP has encountered an Access Violation at 7C94BD02解决方法
php 正则匹配函数体
php 文件夹删除、php清除缓存程序
php download.php实现代码 跳转到下载文件(response.redirect)
PHP类(Class)入门教程

No. « 130 131 132 133 »

技术文章搜索

关键字

PHP 中的 DISCUZ架构:AJAX之ajax.js 函数之一

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-08-14   浏览: 257 ::
收藏到网摘: n/a

以下为引用的内容：
var Ajaxs = new Array();
function Ajax(recvType, statusId) {
        var aj = new Object();
        aj.statusId = statusId ? document.getElementById(statusId) : null;
        aj.targetUrl = '';
        aj.sendString = '';
        aj.recvType = recvType ? recvType : 'XML';
        aj.resultHandle = null;

 

        aj.createXMLHttpRequest = function() {
                var request = false;
                if(window.XMLHttpRequest) {
                        request = new XMLHttpRequest();
                        if(request.overrideMimeType) {
                                request.overrideMimeType('text/xml');
                        }
                } else if(window.ActiveXObject) {
                        var versions = ['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.7.0', 'Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.5.0', 'Msxml2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP'];
                        for(var i=0; i<versions.length; i++) {
                                try {
                                        request = new ActiveXObject(versions[i]);
                                        if(request) {
                                                return request;
                                        }
                                } catch(e) {
                                        //alert(e.message);
                                }
                        }
                }
                return request;
        }

        aj.XMLHttpRequest = aj.createXMLHttpRequest();

这一段是想尽一切办法建立一个XMLHttpRequest对象，无论是什么浏览器都能通用了。调用的时候是一个函数Ajax，有两个传入函数recvType和statusId，recvType是ajax返回值的接受类型，有HTML和XML两种类型，Dz一般用的是XML类型；statusID这个是用来指示状态的div。

以下为引用的内容：     

以下为引用的内容：
aj.processHandle = function() {
                if(aj.statusId) {
                        aj.statusId.style.display = '';
                }
                if(aj.XMLHttpRequest.readyState == 1 && aj.statusId) {
                        aj.statusId.innerHTML = xml_http_building_link;
                } else if(aj.XMLHttpRequest.readyState == 2 && aj.statusId) {
                        aj.statusId.innerHTML = xml_http_sending;
                } else if(aj.XMLHttpRequest.readyState == 3 && aj.statusId) {
                        aj.statusId.innerHTML = xml_http_loading;
                } else if(aj.XMLHttpRequest.readyState == 4) {
                        if(aj.XMLHttpRequest.status == 200) {
                                for(k in Ajaxs) {
                                        if(Ajaxs[k] == aj.targetUrl) {
                                                Ajaxs[k] = null;
                                        }
                                }

 

                                if(aj.statusId) {
                                        aj.statusId.innerHTML = xml_http_data_in_processed;
                                        aj.statusId.style.display = 'none';
                                }
                                if(aj.recvType == 'HTML') {
                                        aj.resultHandle(aj.XMLHttpRequest.responseText, aj);
                                } else if(aj.recvType == 'XML') {
                                        aj.resultHandle(aj.XMLHttpRequest.responseXML.lastChild.firstChild.nodeValue, aj);
                                }
                        } else {
                                if(aj.statusId) {
                                        aj.statusId.innerHTML = xml_http_load_failed;
                                }
                        }
                }
        }

Ajax实例化后的对象aj的processHandle方法，作用当然就是处理ajax请求过程的函数。
具体作用有两点：
第一点，那就是对statusId这个div进行ajax请求过程全程提示，在这段代码的前三分之一的样子就是做这个用的。
注意在register.htm中有对过程的定义，以下的代码引用自./templates/default/register.htm 

以下为引用的内容：
  var profile_seccode_invalid = '{lang register_profile_seccode_invalid}';
                var profile_secanswer_invalid = '{lang register_profile_secqaa_invalid}';
                var profile_username_toolong = '{lang register_profile_username_toolong}';
                var profile_username_tooshort = '{lang register_profile_profile_username_tooshort}';
                var profile_username_illegal = '{lang register_profile_username_illegal}';
                var profile_passwd_illegal = '{lang register_profile_passwd_illegal}';
                var profile_passwd_notmatch = '{lang register_profile_passwd_notmatch}';
                var profile_email_illegal = '{lang register_profile_email_illegal}';
                var profile_email_invalid = '{lang register_profile_email_invalid}';
                var profile_email_censor = '{lang register_profile_email_censor}';
                var profile_email_msn = '{lang register_profile_email_msn}';
                var doublee = parseInt('$doublee');
                var lastseccode = lastsecanswer = lastusername = lastpassword = lastemail = '';
                var xml_http_building_link = '{lang xml_http_building_link}';
                var xml_http_sending = '{lang xml_http_sending}';
                var xml_http_loading = '{lang xml_http_loading}';
                var xml_http_load_failed = '{lang xml_http_load_failed}';
                var xml_http_data_in_processed = '{lang xml_http_data_in_processed}';

这个便是statusId具体中要提示的文字了，之所以要这样写当然是为了方便多语言。              

第二点是最重要的，当XMLHttpRequest.status=200的时候，那么就表示请求成功并返回了东西，这个时候就用resultHandle这个函数对返回的东西进行处理，可以看到还是分为HTML和XML两种情况分别调用不同的方法，一个是responsText一个是responseXML。      

以下为引用的内容：
aj.get = function(targetUrl, resultHandle) {
                if(in_array(targetUrl, Ajaxs)) {
                        return false;
                } else {
                        arraypush(Ajaxs, targetUrl);
                }
                aj.targetUrl = targetUrl;
                aj.XMLHttpRequest.onreadystatechange = aj.processHandle;
                aj.resultHandle = resultHandle;
                if(window.XMLHttpRequest) {
                        aj.XMLHttpRequest.open('GET', aj.targetUrl);
                        aj.XMLHttpRequest.send(null);
                } else {
                        aj.XMLHttpRequest.open("GET", targetUrl, true);
                        aj.XMLHttpRequest.send();
                }
        }

 

        aj.post = function(targetUrl, sendString, resultHandle) {
                if(in_array(targetUrl, Ajaxs)) {
                        return false;
                } else {
                        arraypush(Ajaxs, targetUrl);
                }
                aj.targetUrl = targetUrl;
                aj.sendString = sendString;
                aj.XMLHttpRequest.onreadystatechange = aj.processHandle;
                aj.resultHandle = resultHandle;
                aj.XMLHttpRequest.open('POST', targetUrl);
                aj.XMLHttpRequest.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                aj.XMLHttpRequest.send(aj.sendString);
        }
        return aj;
}