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How to call a web service using HttpWebRequest?

I want to call SAP web service using JavaScript. Its urgent. Can anyone help me?

  • Answer:

    Try Soap to JSON, disclaimer, it is our product and it is freemium.

Akash Kava at Quora Visit the source

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hi Aakash please check my code its give me null value   <html>  <head>  <title> Hello</title>  <script src="http://wbsp.arb.ltu.se/Motionbase/workingdocs/xmpp-code/xml_for_script-3.1/jsXMLParser/compressed/tinyxmlw3cdom.js"></script>  <script src="http://wbsp.arb.ltu.se/Motionbase/workingdocs/xmpp-code/xml_for_script-3.1/jsXMLParser/compressed/tinyxmlsax.js"></script>  </head>  <body>  <script>   alert("Hello"); var username       = "TTCOSNJ09624"; var password       = "computer1!"; var baseURL        = " "; var dparameter     = null; var interval       = null; var serviceName    = "ZMATERIAL_DTL2"; var clientID       = "250"; var operationName  = "ZMATERIAL_DTL2"; var speedoCaption  = "Demo Service";   //getHTTPObject(); callService(); function getHTTPObject()  {    var xmlhttp;         if (!xmlhttp && typeof XMLHttpRequest != 'undefined')            {                  try                      {                              xmlhttp = new XMLHttpRequest();                       }                  catch (e)                      {                         xmlhttp = false;                      }            }    return xmlhttp;  } function callService()  {     http = getHTTPObject();   // this is our HTTP Object                      try                      {                          http.open("GET"," !", true);                        //http.open("POST", baseURL + "/sap/bc/srt/rfc/sap/" + serviceName + "?sap-client=250&wsdl=1.1&sap-user=" + username + "&sap-password=" + password, true);    //alert("Call Service");    //var service = SOAP.connect(" ");    //alert(service.readyState);    //alert(service.status); }                     catch (exc) {      alert(exc); //print(exc); }                    http.onreadystatechange = handleHttpResponse;        http.setRequestHeader("Man","POST /sap/bc/srt/rfc/sap/" + serviceName + "?sap-client=250 HTTP/1.1");    http.setRequestHeader("Host", baseURL);   //var token = username + ":"  + password;   //document.write(btoa(token));   var base_auth = "Basic VFRDT1NOSjA5NjI0OmNvbXB1dGVyMSE=";   http.setRequestHeader("Authorization", base_auth);   http.setRequestHeader("Content-Type", "text/xml; charset=ISO-8859-1");     http.setRequestHeader("Access-Control-Allow-Origin","*");        http.setRequestHeader("Access-Control-Allow-Methods", "POST");        http.setRequestHeader('Access-Control-Allow-Headers','Origin, X-Requested-With, Content-Type, Accept');        http.withCredentials=true;  // http.setRequestHeader("SoapAction", "");         //var xmls = http.responseText; //alert(xmls); var  xmlstring = "<?xml version='1.0' encoding='utf-8' ?>"   + "<soapenv:Envelope xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:urn='urn:sap-com:document:sap:soap:functions:mc-style'>"   + "<soapenv:Header/>"    + "<soapenv:Body>"       + " <urn:ZrfcMaterialDisplay>"          + " <IMakt>"                       + " <item>"                + " <Mandt>"   + " </Mandt>"               + " <Matnr>"   + " </Matnr>"               + " <Spras>" + " </Spras>"               + " <Maktx>"   + " </Maktx>"               + " <Maktg>"   + " </Maktg>"            + " </item>"         + " </IMakt>"         + " <Matnr>" + " WINGER" + " </Matnr>"         + " <Spras>" + " E" + " </Spras>"      + " </urn:ZrfcMaterialDisplay>"   + " </soapenv:Body>" + " </soapenv:Envelope>";  alert("ss");   http.send(xmlstring);  alert("response handled"); } function handleHttpResponse()  {       if (http.readyState == 4 )    {          alert("readystate ="+http.readyState);             if (http.status == 200)            {         alert("status="+http.status);               var xmlfile = http.responseText;  //var xmls = http.responseXML; // alert(xmls);         alert(xmlfile); //instantiate the W3C DOM Parser var parser = new DOMImplementation(); alert("instantiate the W3C DOM Parser"); //alert(parser);                                                            //load the XML into the parser and get the DOMDocument var domDoc = parser.loadXML(xmlfile);                                                            <!-- var domDoc = parser.loadXML(xmlstring); -->          alert("load the XML into the parser and get the DOMDocument");         // alert(domDoc);                                                                         //get the root node (in this case, it is ROOTNODE) var docRoot = domDoc.getDocumentElement();          alert("get the root node (in this case, it is ROOTNODE)");          //alert(docRoot);                                                                        //get the first "TAG1" element var firstTag1 = docRoot.getElementsByTagName("item").item(0);          //var firstTag1 = docRoot.getElementsByTagName("xsd:se").item(0); //var firstTag1 = docRoot.getElementsByTagName("wsdl:portType").item(0); alert("get the first element"); //alert(firstTag1.getLength()); alert(firstTag1);                                                                             //display the data         alert(firstTag1.getFirstChild().getNodeValue());        alert("hi5");   }   else alert(http.status);  }  } </script>  </body>  </html>

Ashvini Deshmukh

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