How to access (any) soap / rest web services from widget

Question

Hi all,
Is there an API, javascript library etc, which allows accessing (any) soap / rest webservices from widgets?
I know I can access web services from sap j2ee with widget foundation, but I'm still not sure how to access "outside"
web services.
A blog entry about this topic would be greatly appreciated I think, not only by me.
Regards,
Ladislav

Answer 1

As promised, below is the js lib source code. I did not see the attachement option, so you can just create a text file and save it with .js extension.
          function getHdrData( FuncName ) {
            return '<?xml version="1.0" encoding="UTF-8" ?>' +
                      '<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" ' +
                                         'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ' +
                                         'xmlns:xs="http://www.w3.org/2001/XMLSchema">' +
                      '<SOAP-ENV:Header><sapsess:Session ' +
                                'xmlns:sapsess="http://www.sap.com/webas/630/soap/features/session/">' +
                                '<enableSession>true</enableSession></sapsess:Session>'+
                      '</SOAP-ENV:Header><SOAP-ENV:Body><ns1:' +
                      FuncName +
                      ' xmlns:ns1=\'urn:sap-com:document:sap:soap:functions:mc-style\'>';
          function addVar ( VarName, VarValue ) {
            return '<' + VarName + '>' + VarValue  + '</' + VarName + '>';
          function getFtrData( FuncName ) {
          return '</ns1:' + FuncName + '></SOAP-ENV:Body></SOAP-ENV:Envelope>';
          function setTable ( TblName, TblType) {
               return '<' + TblName + ' xsi:type=\'ns1:' + TblType + '\'>';
          function closeTable ( TblName) {
               return '</' + TblName + '>';
          function startEntry( ) {
               return '<item>';
          function endEntry( ) {
               return '</item>';
So the following is the basic on how to use this library:
* Set up SOAP envelope
* Get the header data
getHdrData( SOAP operation name )
* If the web service set up the table and record start tags
setTable( variable name, table type ) - Optional
Set new record tag: startEntry() ? Optional
* Set up the fieldname or variable name
addVar( variable name, variable value )
* Set up the table and record end tags
endEntry() ? Optional
closeTable( variable name ) ? Optional
* Set up the footer SOAP envelope
Set footer data: getFtrData(SOAP operation name )
So hopefully that will help you consume SAP Published web services.