使用javascript调用webservice示例

在javascript中使用soap调用webservice的示例代码
代码再IE6和FF测试通过,对于c#写的webservice和java(xfire)写的,都测试过,没有问题
此代码原型来源于 http://www.guru4.net/ 的javascript soapclient
发现这个下载的js只能用于调用c#的webservice,所以利用mootools,重新封装,达到IE和火狐的兼容的同时,兼容java和c#
(再例子中使用的 mootools.v1.11.js 文件,做过修改)
客户端js调用代码如下
js 代码

function ajaxRequest()
{
var url = "http://localhost:88/webservicedemo.asmx";

//设置webService传入参数
//
//注意:
//
// 调用.Net 写的webservice(如例子中的webservicedemo.asmx)
// HelloTo(String name) 针对name参数必须写成 <name></name>wqj,还有更多参数一样写,使用名称匹配
// 传入的参数数量可以不等于(多于或少于)方法要求的参数
//
// 调用java(xfire) 发布的webService
// 传入的参数必须与调用方法的参数数量相等,且按传入值的顺序进行匹配
//

var para = "<name></name>wqj"; 这里应该是一个标准的xml形式,源码贴出来时被虑掉了,请参看附件源码

var op = {
data:para,
onComplete: showResponse,
onFailure:showError,
update:'ajaxBack'
};

var service = new WebService(url,"HelloTo",op);
service.request();
return false;
}
function showError(obj)
{
//obj 是一个xmlHttpRequest对象
alert("error");
}
function showResponse(requestText,requestXML)
{
//requestText 返回的文本
//requestXML 返回的XML
alert("ok");
}

WebService类的代码如下(webservice.js)
js 代码

var WSDLS = {};

var WebService = new Class({

url : '',
method : '',
options:
{
method:'GET',
data: null,
update: null,
onComplete: Class.empty,
onError:Class.empty,
evalScripts: false,
evalResponse: false
},

initialize: function(url,method,options)
{
this.url = url;
this.method = method;
this.options = options;

},

request : function()
{
var wsdl = WSDLS[this.url];
if(!wsdl)
{
var op = {method:'GET',async: false};
var wsdlAjax = new XHR(op).send(this.url + "?wsdl", null);
wsdl = wsdlAjax.transport.responseXML;
WSDLS[this.url] = wsdl;
}
this.setSoap(wsdl);
},

setSoap : function(wsdl)
{

var ns = (wsdl.documentElement.attributes["targetNamespace"] + "" == "undefined") ? wsdl.documentElement.attributes.getNamedItem("targetNamespace").nodeValue : wsdl.documentElement.attributes["targetNamespace"].value;
var sr =
"" +
""
"xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " +
"xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" " +
"xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
"<soap:body>"</soap:body> +
"<" + this.method + " xmlns=\"" + ns + "\">" +
(this.options.data === null ?"":this.options.data) +
" + this.method + ">;

this.options.method = 'post';
this.options.data = null;

var soapaction = ((ns.lastIndexOf("/") != ns.length - 1) ? ns + "/" : ns) + this.method;

var soapAjax = new Ajax(this.url,this.options);
soapAjax.setHeader("SOAPAction", soapaction);
soapAjax.setHeader("Content-type", "text/xml; charset=utf-8");
soapAjax.request(sr);
}

});

在第一个版本中存在以下问题
1. 不能根据webservice的要求输入参数自动组织参数
2. 没有处理返回值
3.一旦webservice调用过程出错,会形成一个死循环(一直弹出error)

V2 说明

1. 解决第一版中死循环的问题
2. 统一输入参数的传入形式(与mootools的ajax使用方式完全一致),形式如name=wqj&age=20&........
3. 自动根据参数名对应的值,组织webservice的传入参数,只根据webservice要求的参数名查找对应的值
与顺序不再有关系.(对于xfire中的输入参数使用名称 in0,in1........)
传入的参数数量也不再要求一致,多的自动丢弃,少的自动传空

4. 对于返回的XML,增加提取方法,返回需要的关键返回值(去掉XML的框框)
详细参照附件源码,下面是部分关键代码

WebService类的代码如下(webservice.js)

js 代码

var WSDLS = {};

var WebService = new Class({

url : '',
method : '',
options:
{
method:'GET',
data: null,
update: null,
onComplete: Class.empty,
onError:Class.empty,
evalScripts: false,
evalResponse: false
},

initialize: function(url,method,options)
{
this.url = url;
this.method = method;
this.options = options;
},

request : function()
{
var wsdl = WSDLS[this.url];
if(!wsdl)
{
var op = {method:'GET',async: false};
var wsdlAjax = new XHR(op).send(this.url + "?wsdl", null);
wsdl = wsdlAjax.transport.responseXML;
WSDLS[this.url] = wsdl;
}

this.setSoap(wsdl);
},

setSoap : function(wsdl)
{
var paraXML = this.getParaXML(wsdl);
alert(paraXML);
var ns = (wsdl.documentElement.attributes["targetNamespace"] + "" == "undefined") ? wsdl.documentElement.attributes.getNamedItem("targetNamespace").nodeValue : wsdl.documentElement.attributes["targetNamespace"].value;
var sr =
"" +
" +
"xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " +
"xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" " +
"xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" +
"<soap:body>"</soap:body> +
"<" + this.method + " xmlns=\"" + ns + "\">" +
paraXML +
" + this.method + ">";

this.options.method = 'post';
this.options.data = null;

var soapaction = ((ns.lastIndexOf("/") != ns.length - 1) ? ns + "/" : ns) + this.method;

var soapAjax = new Ajax(this.url,this.options);
soapAjax.setHeader("SOAPAction", soapaction);
soapAjax.setHeader("Content-type", "text/xml; charset=utf-8");
soapAjax.request(sr);
},
getParaXML : function(wsdl)
{

var objNode = null;
var rtnValue = "";
//java(xfire)
var ell = this.getElementsByTagName(wsdl,"xsd:element");
if(ell.length == 0)
{
//c#
ell = this.getElementsByTagName(wsdl,"s:element");
}
for(var i = 0; i < ell.length; i++)
{
if(this.getElementAttrValue(ell[i],"name") == this.method)
{
objNode = ell[i];
break;
}
}

if(objNode == null) return rtnValue;
//java(xfire)
ell = this.getElementsByTagName(objNode,"xsd:element");
if(ell.length == 0)
{
//c#
ell = this.getElementsByTagName(objNode,"s:element");
}
if(ell.length == 0) return rtnValue ;

var hash = new Hash();

if(this.options.data != null && this.options.data.clean != "")
{
hash = this.options.data.split("&").toHash("=");
}

for(var i = 0; i < ell.length; i++)
{
var paraName = this.getElementAttrValue(ell[i],"name");
rtnValue = rtnValue + this.getSingleXML(paraName,hash);
}

return rtnValue;
},

getSingleXML : function (name,hash)
{
name = name.trim();

var rtnValue = "";
if(hash.hasKey(name))
{
rtnValue = hash.get(name);
}
rtnValue = "<" + name + ">" + xmlscc(rtnValue) + " + name + ">"
return rtnValue;
},
getBackData: function(xml)
{
var rtnValue = "";
//java(xfire)
var soap = this.getElementsByTagName(xml,"ns1:out");
if(soap.length == 0)
{
//c#
soap = this.getElementsByTagName(xml,this.method + "Result");
}
return soap[0].childNodes[0].nodeValue;

},
getElementsByTagName : function(objNode,tagName)
{
//tagName 形式如 xsd:element ,写出tag的全称

var ell;
if(this.isIE())
{
ell = objNode.getElementsByTagName(tagName);
}
else
{
if(tagName.contains(":")) tagName = tagName.split(":")[1];
ell = objNode.getElementsByTagName(tagName);
}
return ell;
},
getElementAttrValue : function(objNode,attrName)
{
var rtnValue = "";

if(objNode == null) return rtnValue;

if(objNode.attributes[attrName] + "" == "undefined")
{
if(objNode.attributes.getNamedItem(attrName) != null)
rtnValue = objNode.attributes.getNamedItem(attrName).nodeValue ;

}
else
{
if(objNode.attributes[attrName] != null)
rtnValue = objNode.attributes[attrName].value;
}
return rtnValue;
},
isIE : function()
{
var isMSIE = /*@cc_on!@*/false;
return isMSIE;
}
});

Array.extend({

toHash : function (splitChar)
{
var hash = new Hash({});
for(var i=0;i<this.length;i++)
{

if(this[i].split(splitChar).length == 1) contrnue;

var key = this[i].split(splitChar)[0].trim();
var value = this[i].split(splitChar)[1].trim();

hash.set(key, value);
}

return hash;
}
});

function xmlscc(strData)
{

strData=strData.replace(/&/g, "&");
strData=strData.replace(/>/g, ">");
strData=strData.replace(/"<");
strData=strData.replace(/"/g, """);
strData=strData.replace(/'/g, "'");
return strData;
}

相应的调用代码如下:

js 代码

<script type=< span="">"text/javascript">

var service ;
function ajaxRequest()
{
var url = "http://localhost:88/webservicedemo.asmx";

//设置webService传入参数
//
//注意:
//
// 调用webservice(如例子中的webservicedemo.asmx)
// HelloTo(String name) 针对name参数必须写成name=wqj ,还有更多参数一样写,使用&符号分隔(name=11&age=20&.....),使用名称匹配
// 传入的参数数量可以不等于(多于或少于)方法要求的参数

var para = "name=wqj";

var op = {
data:para,
onComplete: showResponse,
onFailure:showError,
update:'ajaxBack'
};

service = new WebService(url,"HelloTo",op);
service.request();
return false;
}
function showError(obj)
{
//obj 是一个xmlHttpRequest对象
alert("error");
}
function showResponse(requestText,requestXML)
{
//requestText 返回的文本
//requestXML 返回的XML
// service.getBackData 就是取出返回的XML中,实际需要的数据
//经过测试兼容 IE,FF
alert(service.getBackData(requestXML));

}
</script>