node-soap-sap
A minimal node SOAP client specially made to interact for SAP Web Services
Last updated 5 years ago by vijaybcone .
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A SOAP client and server for node.js.

This module lets you connect to web services using SOAP. It also provides a server that allows you to run your own SOAP services.

Features:

  • Very simple API
  • Handles both RPC and Document schema types
  • Supports multiRef SOAP messages (thanks to @kaven276)
  • Support for both synchronous and asynchronous method handlers
  • WS-Security (currently only UsernameToken and PasswordText encoding is supported)

Install

Install with npm:

  npm install soap

Module

soap.createClient(url[, options], callback) - create a new SOAP client from a WSDL url. Also supports a local filesystem path.

  var soap = require('soap');
  var url = 'http://example.com/wsdl?wsdl';
  var args = {name: 'value'};
  soap.createClient(url, function(err, client) {
      client.MyFunction(args, function(err, result) {
          console.log(result);
      });
  });

Within the options object you may provide an endpoint property in case you want to override the SOAP service's host specified in the .wsdl file.

soap.listen(server, path, services, wsdl) - create a new SOAP server that listens on path and provides services.

wsdl is an xml string that defines the service.

  var myService = {
      MyService: {
          MyPort: {
              MyFunction: function(args) {
                  return {
                      name: args.name
                  };
              }

              // This is how to define an asynchronous function.
              MyAsyncFunction: function(args, callback) {
                  // do some work
                  callback({
                      name: args.name
                  })
              }
          }
      }
  }

  var xml = require('fs').readFileSync('myservice.wsdl', 'utf8'),
      server = http.createServer(function(request,response) {
          response.end("404: Not Found: "+request.url)
      });

  server.listen(8000);
  soap.listen(server, '/wsdl', myService, xml);

server logging

If the log method is defined it will be called with 'received' and 'replied' along with data.

  server = soap.listen(...)
  server.log = function(type, data) {
    // type is 'received' or 'replied'
  };

server security example using PasswordDigest

If server.authenticate is not defined no authentation will take place.

  server = soap.listen(...)
  server.authenticate = function(security) {
    var created, nonce, password, user, token;
    token = security.UsernameToken, user = token.Username,
            password = token.Password, nonce = token.Nonce, created = token.Created;
    return user === 'user' && password === soap.passwordDigest(nonce, created, 'password');
  };

server connection authorization

This is called prior to soap service method If the method is defined and returns false the incoming connection is terminated.

  server = soap.listen(...)
  server.authorizeConnection = function(req) {
    return true; // or false
  };

Client

An instance of Client is passed to the soap.createClient callback. It is used to execute methods on the soap service.

Client.describe() - description of services, ports and methods as a JavaScript object

  client.describe() // returns
    {
      MyService: {
        MyPort: {
          MyFunction: {
            input: {
              name: 'string'
            }
          }
        }
      }
    }

Client.setSecurity(security) - use the specified security protocol

node-soap has several default security protocols. You can easily add your own as well. The interface is quite simple. Each protocol defines 2 methods:

  • addOptions - a method that accepts an options arg that is eventually passed directly to request
  • toXML - a method that reurns a string of XML.

By default there are 3 protocols:

####BasicAuthSecurity

  client.setSecurity(new soap.BasicAuthSecurity('username', 'password'));

####ClientSSLSecurity Note: If you run into issues using this protocol, consider passing these options as default request options to the constructor:

  • rejectUnauthorized: false
  • strictSSL: false
  • secureOptions: constants.SSL_OP_NO_TLSv1_2//this is likely needed for node >= 10.0
  client.setSecurity(new soap.ClientSSLSecurity(
    '/path/to/key'
    , '/path/to/cert'
    , {/*default request options*/}
  ));

####WSSecurity

  client.setSecurity(new WSSecurity('username', 'password'))

Client.method(args, callback) - call method on the SOAP service.

  client.MyFunction({name: 'value'}, function(err, result) {
      // result is a javascript object
  })

Client.service.port.method(args, callback[, options]) - call a method using a specific service and port

  client.MyService.MyPort.MyFunction({name: 'value'}, function(err, result) {
      // result is a javascript object
  })

+#### Options (optional)

  • Accepts any option that the request module accepts, see here.
  • For example, you could set a timeout of 5 seconds on the request like this:
  client.MyService.MyPort.MyFunction({name: 'value'}, function(err, result) {
      // result is a javascript object
  }, {timeout: 5000})

Client.addSoapHeader(soapHeader[, name, namespace, xmlns]) - add soapHeader to soap:Header node

Options

  • soapHeader Object({rootName: {name: "value"}}) or strict xml-string
Optional parameters when first arg is object :
  • name Unknown parameter (it could just a empty string)
  • namespace prefix of xml namespace
  • xmlns URI

Client.lastRequest - the property that contains last full soap request for client logging

WSSecurity

WSSecurity implements WS-Security. UsernameToken and PasswordText/PasswordDigest is supported. An instance of WSSecurity is passed to Client.setSecurity.

  new WSSecurity(username, password, passwordType)
    //'PasswordDigest' or 'PasswordText' default is PasswordText

Handling XML Attributes.

You can achieve attributes like:

<parentnode>
  <childnode name="childsname">
  </childnode>
</parentnode>

By attaching an attributes object to a node.

{
  parentnode: {
    childnode: {
      attributes: {
        name: 'childsname'
      }
    }
  }
}

However, "attributes" may be a reserved key for some systems that actually want a node

<attributes>
</attributes>

In this case you can configure the attributes key by passing in an options object to the createClient call like so.

soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', {attributesKey: '$attributes'}, function (err, client) {
  client.*method*({
    parentnode: {
      childnode: {
        $attributes: {
          name: 'childsname'
        }
      }
    }
  });
});

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