Ajax 同步请求的代码

最新推荐文章于 2024-03-01 11:06:11 发布

原创最新推荐文章于 2024-03-01 11:06:11 发布 · 860 阅读

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CC 4.0 BY-SA版权

文章标签：

#ajax #xmlhttprequest #parameters #callback #mozilla #service

本文介绍了一种使用JavaScript实现的同步调用Web服务的方法。该方法通过创建XMLHttpRequest对象发送POST请求，并设置请求头来传递参数。文章详细展示了如何处理响应数据及回调函数的使用。

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tw.coach.callService_sync = function(service, params, callBack) { DEBUG("callService<br>"); var url = "/portal/jsp/callService.do?id=" + service; var parameters = "input=" + params; var http_request = null; if (window.XMLHttpRequest) { // Mozilla, Safari,... http_request = new XMLHttpRequest(); if (http_request.overrideMimeType) { http_request.overrideMimeType('text/xml'); } } else if (window.ActiveXObject) { // IE try { http_request = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { http_request = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {} } } if (!http_request) { alert('Cannot create XMLHTTP instance'); return false; } http_request.open('POST', url, false); http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); http_request.setRequestHeader("Content-length", parameters.length); http_request.setRequestHeader("Connection", "close"); http_request.send(parameters); var ret = new Object(); //parse the data via http_request.responseXML or http_request.responseText /** var result = http_request.responseXML.getElementsByTagName("output"); for (var i = 0 ; i < result.length ; i++) { var output = result[i]; var name = output.getAttribute("name"); var data = ac_addVariable(name, output.firstChild, ret); ret[name] = data; } **/ callBack(ret); }