Here a step by step guide to expose the RFC-enabled function module RFC_READ_TABLE as WebService and how to use it via JavaScript:
With this knowledge it should be now not difficult to expose any RFC-enable function module as WebService and to use it inside your JavaScript program.
- Start transaction code SE80 and create a new Enterprise Service.
- Choose Service Provider and press Continue button in the dialog.
- Choose Existing ABAP Object and press Continue button.
- Name the service definition, the description and press Continue button.
- Choose Function Module and press Continue button.
- Name Function Module with RFC_READ_TABLE.
- Accept SOAP Appl, set Profile to Authentication with User and Password, No Transport Guarantee and press Continue button.
- Choose the Package you want, I my case I activate Local Object CheckBox, and press Continue button.
- Press Complete button.
- Now Save and Activate the Service Definition.
- Start the transaction code SOAMANAGER, log on and select the link Web Service Configuration.
- Search for your service name, in my case ZTEST. Press the Apply Selection button.
- Choose Configurations tab below and choose the link Create.
Set the Service Name, the Description, the Binding Name and press the button Apply Settings.
- Scroll down and choose in Provider Security User ID/Password and Save your configuration.
- Choose the Overview tab and select the link Open WSDL document for selected binding or service.
A new browser window will be opened, scroll down until address location tag. Here you find the URL of the web service.
Thats all to expose a RFC function module as WebService. - Here now a complete request to call the WebService with the table USR01.POST /sap/bc/srt/rfc/sap/ztest2/001/ztest2/rfc_read_table HTTP/1.1
Host: ABAP
Accept: */*
Authorization: Basic YmN1c2VyOm1pbmlzYXA=
content-length: 428
content-type: text/xml
<?xml version="1.0" encoding="UTF-8"?>
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<env:Header/>
<env:Body>
<ns1:RFC_READ_TABLE xmlns:ns1="urn:sap-com:document:sap:rfc:functions">
<DATA />
<FIELDS />
<OPTIONS />
<QUERY_TABLE>USR01</QUERY_TABLE>
</ns1:RFC_READ_TABLE>
</env:Body>
</env:Envelope>
- Here now a JavaScript program to call the SAP WebService.
<!doctype html>
<html>
<head>
<title>Calling Web Service from jQuery</title>
<script type="text/javascript" src="jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#btnCallWebService").click(function (event) {
var wsUrl = "http://ABAP:8080/sap/bc/srt/rfc/sap/ztest/001/ztest/rfc_read_table";
var soapRequest = '<?xml version="1.0" encoding="UTF-8"?>' +
'<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xs="http://www.w3.org/2001/XMLSchema">' +
'<env:Body>' +
'<ns1:RFC_READ_TABLE xmlns:ns1="urn:sap-com:document:sap:rfc:functions">' +
'<DATA />' +
'<FIELDS />' +
'<OPTIONS />' +
'<QUERY_TABLE>USR01</QUERY_TABLE>' +
'</ns1:RFC_READ_TABLE>' +
'</env:Body>' +
'</env:Envelope>';
$.ajax({
type: "POST",
url: wsUrl,
contentType: "text/xml",
dataType: "xml",
headers: {
"Authorization": "Basic " + btoa("bcuser:minisap"),
"Accept": "*/*",
"Host": "ABAP"
},
data: soapRequest,
success: processSuccess,
});
error: processError
});
});
function processSuccess(data, status, req) {
alert('success');
if (status == "success")
alert(req.responseText);
}
function processError(data, status, req) {
alert(req.responseText + " " + status);
}
</script>
</head>
<body>
<h3>
Calling SAP Web Services via JavaScript with jQuery/AJAX
</h3>
<input id="btnCallWebService" value="Call web service" type="button" />
</body>
</html>
With this knowledge it should be now not difficult to expose any RFC-enable function module as WebService and to use it inside your JavaScript program.
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