问题是“使用Javascript的最简单的SOAP示例是什么?”

这个答案是Node.js环境中的一个例子，而不是浏览器。(让我们将脚本命名为SOAP -node.js)并且我们将使用来自欧洲PMC的公共SOAP web服务作为示例来获取一篇文章的参考列表。

const XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
const DOMParser = require('xmldom').DOMParser;

function parseXml(text) {
    let parser = new DOMParser();
    let xmlDoc = parser.parseFromString(text, "text/xml");
    Array.from(xmlDoc.getElementsByTagName("reference")).forEach(function (item) {
        console.log('Title: ', item.childNodes[3].childNodes[0].nodeValue);
    });

}

function soapRequest(url, payload) {
    let xmlhttp = new XMLHttpRequest();
    xmlhttp.open('POST', url, true);

    // build SOAP request
    xmlhttp.onreadystatechange = function () {
        if (xmlhttp.readyState == 4) {
            if (xmlhttp.status == 200) {
                parseXml(xmlhttp.responseText);
            }
        }
    }

    // Send the POST request
    xmlhttp.setRequestHeader('Content-Type', 'text/xml');
    xmlhttp.send(payload);
}

soapRequest('https://www.ebi.ac.uk/europepmc/webservices/soap', 
    `<?xml version="1.0" encoding="UTF-8"?>
    <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
    <S:Header />
    <S:Body>
        <ns4:getReferences xmlns:ns4="http://webservice.cdb.ebi.ac.uk/"
            xmlns:ns2="http://www.scholix.org"
            xmlns:ns3="https://www.europepmc.org/data">
            <id>C7886</id>
            <source>CTX</source>
            <offSet>0</offSet>
            <pageSize>25</pageSize>
            <email>ukpmc-phase3-wp2b---do-not-reply@europepmc.org</email>
        </ns4:getReferences>
    </S:Body>
    </S:Envelope>`);

在运行代码之前，你需要安装两个包:

npm install xmlhttprequest
npm install xmldom

现在你可以运行代码:

node soap-node.js

你会看到如下输出:

Title:  Perspective: Sustaining the big-data ecosystem.
Title:  Making proteomics data accessible and reusable: current state of proteomics databases and repositories.
Title:  ProteomeXchange provides globally coordinated proteomics data submission and dissemination.
Title:  Toward effective software solutions for big biology.
Title:  The NIH Big Data to Knowledge (BD2K) initiative.
Title:  Database resources of the National Center for Biotechnology Information.
Title:  Europe PMC: a full-text literature database for the life sciences and platform for innovation.
Title:  Bio-ontologies-fast and furious.
Title:  BioPortal: ontologies and integrated data resources at the click of a mouse.
Title:  PubMed related articles: a probabilistic topic-based model for content similarity.
Title:  High-Impact Articles-Citations, Downloads, and Altmetric Score.

function SoapQuery(){
  var namespace = "http://tempuri.org/";
  var site = "http://server.com/Service.asmx";
  var xmlhttp = new ActiveXObject("Msxml2.ServerXMLHTTP.6.0");
  xmlhttp.setOption(2,  13056 );  /* if use standard proxy */
  var args,fname =  arguments.callee.caller.toString().match(/ ([^\(]+)/)[1]; /*Имя вызвавшей ф-ции*/
  try { args =   arguments.callee.caller.arguments.callee.toString().match(/\(([^\)]+)/)[1].split(",");  
    } catch (e) { args = Array();};
  xmlhttp.open('POST',site,true);  
  var i, ret = "", q = '<?xml version="1.0" encoding="utf-8"?>'+
   '<soap:Envelope 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><'+fname+ ' xmlns="'+namespace+'">';
  for (i=0;i<args.length;i++) q += "<" + args[i] + ">" + arguments.callee.caller.arguments[i] +  "</" + args[i] + ">";
  q +=   '</'+fname+'></soap:Body></soap:Envelope>';
            // Send the POST request
            xmlhttp.setRequestHeader("MessageType","CALL");
            xmlhttp.setRequestHeader("SOAPAction",namespace + fname);
            xmlhttp.setRequestHeader('Content-Type', 'text/xml');
            //WScript.Echo("Запрос XML:" + q);
            xmlhttp.send(q);
     if  (xmlhttp.waitForResponse(5000)) ret = xmlhttp.responseText;
    return ret;
  };





function GetForm(prefix,post_vars){return SoapQuery();};
function SendOrder2(guid,order,fio,phone,mail){return SoapQuery();};

function SendOrder(guid,post_vars){return SoapQuery();};

<html>
 <head>
    <title>Calling Web Service from jQuery</title>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.3/jquery.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#btnCallWebService").click(function (event) {
                var wsUrl = "http://abc.com/services/soap/server1.php";
                var soapRequest ='<soap:Envelope 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> <getQuote xmlns:impl="http://abc.com/services/soap/server1.php">  <symbol>' + $("#txtName").val() + '</symbol>   </getQuote> </soap:Body></soap:Envelope>';
                               alert(soapRequest)
                $.ajax({
                    type: "POST",
                    url: wsUrl,
                    contentType: "text/xml",
                    dataType: "xml",
                    data: soapRequest,
                    success: processSuccess,
                    error: processError
                });

            });
        });

        function processSuccess(data, status, req) { alert('success');
            if (status == "success")
                $("#response").text($(req.responseXML).find("Result").text());

                alert(req.responseXML);
        }

        function processError(data, status, req) {
        alert('err'+data.state);
            //alert(req.responseText + " " + status);
        } 

    </script>
</head>
<body>
    <h3>
        Calling Web Services with jQuery/AJAX
    </h3>
    Enter your name:
    <input id="txtName" type="text" />
    <input id="btnCallWebService" value="Call web service" type="button" />
    <div id="response" ></div>
</body>
</html>

Hear是最好的JavaScript与SOAP教程的例子。

http://www.codeproject.com/Articles/12816/JavaScript-SOAP-Client

有人试过吗?https://github.com/doedje/jquery.soap

似乎很容易实现。

例子:

$.soap({
url: 'http://my.server.com/soapservices/',
method: 'helloWorld',

data: {
    name: 'Remy Blom',
    msg: 'Hi!'
},

success: function (soapResponse) {
    // do stuff with soapResponse
    // if you want to have the response as JSON use soapResponse.toJSON();
    // or soapResponse.toString() to get XML string
    // or soapResponse.toXML() to get XML DOM
},
error: function (SOAPResponse) {
    // show error
}
});

会导致

<soap:Envelope
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <helloWorld>
        <name>Remy Blom</name>
        <msg>Hi!</msg>
    </helloWorld>
  </soap:Body>
</soap:Envelope>

这不能直接用JavaScript完成，除非web服务与您的页面在同一个域中。编辑:在2008年和IE<10中，这不能用javascript直接完成，除非服务与你的页面在同一个域上。

如果web服务在另一个域中[并且您必须支持IE<10]，那么您将不得不在您自己的域中使用代理页面来检索结果并将结果返回给您。如果你不需要旧的IE支持，那么你需要在你的服务中添加CORS支持。在这两种情况下，您都应该使用类似timyates建议的库，因为您不希望自己解析结果。

如果web服务在您自己的域中，那么不要使用SOAP。这样做没有很好的理由。如果web服务在您自己的域中，那么修改它，使它能够返回JSON，从而避免处理SOAP带来的所有麻烦。

简单的回答是:不要用javascript发出SOAP请求。使用web服务从另一个域请求数据，然后在服务器端解析结果，并以js友好的形式返回。

你可以使用jquery。Soap插件为你做的工作。

这个脚本使用$。ajax发送SOAPEnvelope。它可以接受XML DOM, XML字符串或JSON作为输入，响应也可以作为XML DOM, XML字符串或JSON返回。

站点的使用示例:

$.soap({
    url: 'http://my.server.com/soapservices/',
    method: 'helloWorld',

    data: {
        name: 'Remy Blom',
        msg: 'Hi!'
    },

    success: function (soapResponse) {
        // do stuff with soapResponse
        // if you want to have the response as JSON use soapResponse.toJSON();
        // or soapResponse.toString() to get XML string
        // or soapResponse.toXML() to get XML DOM
    },
    error: function (SOAPResponse) {
        // show error
    }
});