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
- Install
- Why can't I file an issue?
- Where can I find help?
- Module
- soap.createClient(url[, options], callback) - create a new SOAP client from a WSDL url. Also supports a local filesystem path.
- soap.listen(server, path, services, wsdl) - create a new SOAP server that listens on path and provides services.
- Options
- Server Logging
- Server Events
- SOAP Fault
- Server security example using PasswordDigest
- Server connection authorization
- SOAP Headers
- Client
- Client.describe() - description of services, ports and methods as a JavaScript object
- Client.setSecurity(security) - use the specified security protocol
- Client.method(args, callback) - call method on the SOAP service.
- Client.service.port.method(args, callback[, options[, extraHeaders]]) - call a method using a specific service and port
- Client.lastRequest - the property that contains last full soap request for client logging
- Client.setEndpoint(url) - overwrite the SOAP service endpoint address
- Client Events
- Security
- Handling XML Attributes, Value and XML (wsdlOptions).
- Handling "ignored" namespaces
- Handling "ignoreBaseNameSpaces" attribute
- soap-stub
- Contributors
- 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)
- Supports express based web server(body parser middleware can be used)
Install with npm:
npm install soap
We've disabled issues in the repository and are now solely reviewing pull requests. The reasons why we disabled issues can be found here #731.
Community support can be found on gitter:
If you're looking for professional help you can contact the maintainers through this google form.
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);
});
});
This client has a built in WSDL cache. You can use the disableCache
option to disable it.
The options
argument allows you to customize the client with the following properties:
- endpoint: to override the SOAP service's host specified in the
.wsdl
file. - envelopeKey: to set specific key instead of
<pre><<b>soap</b>:Body></<b>soap</b>:Body></pre>
. - escapeXML: escape special XML characters in SOAP message (e.g.
&
,>
,<
etc). - forceSoap12Headers: to set proper headers for SOAP v1.2.
- httpClient: to provide your own http client that implements
request(rurl, data, callback, exheaders, exoptions)
. - request: to override the request module.
- wsdl_headers: custom HTTP headers to be sent on WSDL requests.
- wsdl_options: custom options for the request module on WSDL requests.
- disableCache: don't cache WSDL files, request them every time.
Note: for versions of node >0.10.X, you may need to specify {connection: 'keep-alive'}
in SOAP headers to avoid truncation of longer chunked responses.
soap.listen(server, path, services, wsdl) - create a new SOAP server that listens on path and provides services.
server can be a http Server or express framework based server 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
});
},
// This is how to receive incoming headers
HeadersAwareFunction: function(args, cb, headers) {
return {
name: headers.Token
};
},
// You can also inspect the original `req`
reallyDetailedFunction: function(args, cb, headers, req) {
console.log('SOAP `reallyDetailedFunction` request from ' + req.connection.remoteAddress);
return {
name: headers.Token
};
}
}
}
};
var xml = require('fs').readFileSync('myservice.wsdl', 'utf8');
//http server example
var server = http.createServer(function(request,response) {
response.end('404: Not Found: ' + request.url);
});
server.listen(8000);
soap.listen(server, '/wsdl', myService, xml);
//express server example
var app = express();
//body parser middleware are supported (optional)
app.use(bodyParser.raw({type: function(){return true;}, limit: '5mb'}));
app.listen(8001, function(){
//Note: /wsdl route will be handled by soap module
//and all other routes & middleware will continue to work
soap.listen(app, '/wsdl', myService, xml);
});
You can pass in server and WSDL Options using an options hash.
var xml = require('fs').readFileSync('myservice.wsdl', 'utf8');
soap.listen(server, {
// Server options.
path: '/wsdl',
services: myService,
xml: xml,
// WSDL options.
attributesKey: 'theAttrs',
valueKey: 'theVal',
xmlKey: 'theXml'
});
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 instances emit the following events:
- request - Emitted for every received messages.
The signature of the callback is
function(request, methodName)
. - headers - Emitted when the SOAP Headers are not empty.
The signature of the callback is
function(headers, methodName)
.
The sequence order of the calls is request
, headers
and then the dedicated
service method.
A service method can reply with a SOAP Fault to a client by throw
ing an
object with a Fault
property.
throw {
Fault: {
Code: {
Value: 'soap:Sender',
Subcode: { value: 'rpc:BadArguments' }
},
Reason: { Text: 'Processing Error' }
}
};
To change the HTTP statusCode of the response include it on the fault. The statusCode property will not be put on the xml message.
throw {
Fault: {
Code: {
Value: 'soap:Sender',
Subcode: { value: 'rpc:BadArguments' }
},
Reason: { Text: 'Processing Error' },
statusCode: 500
}
};
If server.authenticate
is not defined then no authentication 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');
};
The server.authorizeConnection
method is called prior to the soap service method.
If the method is defined and returns false
then the incoming connection is
terminated.
server = soap.listen(...)
server.authorizeConnection = function(req) {
return true; // or false
};
A service method can look at the SOAP headers by providing a 3rd arguments.
{
HeadersAwareFunction: function(args, cb, headers) {
return {
name: headers.Token
};
}
}
It is also possible to subscribe to the 'headers' event. The event is triggered before the service method is called, and only when the SOAP Headers are not empty.
server = soap.listen(...)
server.on('headers', function(headers, methodName) {
// It is possible to change the value of the headers
// before they are handed to the service method.
// It is also possible to throw a SOAP Fault
});
First parameter is the Headers object; second parameter is the name of the SOAP method that will called (in case you need to handle the headers differently based on the method).
Both client & server can define SOAP headers that will be added to what they send. They provide the following methods to manage the headers.
soapHeader
Object({rootName: {name: 'value'}}) or strict xml-string
The index where the header is inserted.
name
Unknown parameter (it could just a empty string)namespace
prefix of xml namespacexmlns
URI
changeSoapHeader(index, soapHeader[, name, namespace, xmlns]) - change an already existing soapHeader
index
index of the header to replace with provided new valuesoapHeader
Object({rootName: {name: 'value'}}) or strict xml-string
An instance of Client
is passed to the soap.createClient
callback. It is used to execute methods on the soap service.
client.describe() // returns
{
MyService: {
MyPort: {
MyFunction: {
input: {
name: 'string'
}
}
}
}
}
client.MyFunction({name: 'value'}, function(err, result, raw, soapHeader) {
// result is a javascript object
// raw is the raw response
// soapHeader is the response soap header as a javascript object
})
The args
argument allows you to supply arguments that generate an XML document inside of the SOAP Body section.
The example above uses {name: 'value'}
as the args. This may generate a SOAP messages such as:
<?xml version="1.0" encoding="utf-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Body>
<Request xmlns="http://www.example.com/v1">
<name>value</name>
</Request>
</soapenv:Body>
</soapenv:Envelope>
Note that the "Request" element in the output above comes from the WSDL. If an element in args
contains no namespace prefix, the default namespace is assumed. Otherwise, you must add the namespace prefixes to the element names as necessary (e.g., ns1:name
).
Currently, when supplying JSON args, elements may not contain both child elements and a text value, even though that is allowed in the XML specification.
You may pass in a fully-formed XML string instead the individual elements in JSON args
and attributes that make up the XML. The XML string should not contain an XML declaration (e.g., <?xml version="1.0" encoding="UTF-8"?>
) or a document type declaration (e.g., <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
).
var args = { _xml: "<ns1:MyRootElement xmlns:ns1="http://www.example.com/v1/ns1">
<ChildElement>elementvalue</ChildElement>
</ns1:MyRootElement>"
};
You must specify all of the namespaces and namespace prefixes yourself. The element(s) from the WSDL are not utilized as they were in the "Example with JSON as the args
" example above, which automatically populated the "Request" element.
Client.service.port.method(args, callback[, options[, extraHeaders]]) - call a method using a specific service and port
client.MyService.MyPort.MyFunction({name: 'value'}, function(err, result) {
// result is a javascript object
})
- 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})
- You can measure the elapsed time on the request by passing the time option:
client.MyService.MyPort.MyFunction({name: 'value'}, function(err, result) {
// client.lastElapsedTime - the elapsed time of the last request in milliseconds
}, {time: true})
client.MyService.MyPort.MyFunction({name: 'value'}, function(err, result) {
// client.lastElapsedTime - the elapsed time of the last request in milliseconds
}, {proxy: 'http://localhost:8888'})
Object properties define extra HTTP headers to be sent on the request.
- Add custom User-Agent:
client.addHttpHeader('User-Agent', `CustomUserAgent`);
To align method call signature with node' standard callback-last patter and event allow promisification of method calls, the following method signatures are also supported:
client.MyService.MyPort.MyFunction({name: 'value'}, options, function (err, result) {
// result is a javascript object
})
client.MyService.MyPort.MyFunction({name: 'value'}, options, extraHeaders, function (err, result) {
// result is a javascript object
})
node-soap
is still working out some kinks regarding namespaces. If you find that an element is given the wrong namespace prefix in the request body, you can add the prefix to it's name in the containing object. I.E.:
client.MyService.MyPort.MyFunction({'ns1:name': 'value'}, function(err, result) {
// request body sent with `<ns1:name`, regardless of what the namespace should have been.
}, {timeout: 5000})
- Remove namespace prefix of param
client.MyService.MyPort.MyFunction({':name': 'value'}, function(err, result) {
// request body sent with `<name`, regardless of what the namespace should have been.
}, {timeout: 5000})
Client instances emit the following events:
- request - Emitted before a request is sent. The event handler receives the entire Soap request (Envelope) including headers. The second parameter is the exchange id.
- message - Emitted before a request is sent. The event handler receives the Soap body contents. Useful if you don't want to log /store Soap headers. The second parameter is the exchange id.
- soapError - Emitted when an erroneous response is received. Useful if you want to globally log errors. The second parameter is the exchange id.
- response - Emitted after a response is received. The event handler receives
the SOAP response body as well as the entire
IncomingMessage
response object. The third parameter is the exchange id. This is emitted for all responses (both success and errors).
An 'exchange' is a request/response couple. Event handlers receive the exchange id in all events. The exchange id is the same for the requests events and the responses events, this way you can use it to retrieve the matching request when an response event is received.
By default exchange ids are generated by using node-uuid but you can use options in client calls to pass your own exchange id.
Example :
client.MyService.MyPort.MyFunction(args , function(err, result) {
}, {exchangeId: myExchangeId})
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 torequest
toXML
- a method that returns a string of XML.
client.setSecurity(new soap.BasicAuthSecurity('username', 'password'));
client.setSecurity(new soap.BearerSecurity('token'));
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
implements WS-Security. UsernameToken and PasswordText/PasswordDigest is supported.
var options = {
hasNonce: true,
actor: 'actor'
};
var wsSecurity = new soap.WSSecurity('username', 'password', options)
client.setSecurity(wsSecurity);
the options
object is optional and can contain the following properties:
passwordType
: 'PasswordDigest' or 'PasswordText' (default:'PasswordText'
)hasTimeStamp
: adds Timestamp element (default:true
)hasTokenCreated
: adds Created element (default:true
)hasNonce
: adds Nonce element (default:false
)mustUnderstand
: adds mustUnderstand=1 attribute to security tag (default:false
)actor
: if set, adds Actor attribute with given value to security tag (default:''
)
WS-Security X509 Certificate support.
var privateKey = fs.readFileSync(privateKeyPath);
var publicKey = fs.readFileSync(publicKeyPath);
var password = ''; // optional password
var wsSecurity = new soap.WSSecurityCert(privateKey, publicKey, password);
client.setSecurity(wsSecurity);
Sometimes it is necessary to override the default behaviour of node-soap
in order to deal with the special requirements
of your code base or a third library you use. Therefore you can use the wsdlOptions
Object, which is passed in the
#createClient()
method and could have any (or all) of the following contents:
var wsdlOptions = {
attributesKey: 'theAttrs',
valueKey: 'theVal',
xmlKey: 'theXml'
}
If nothing (or an empty Object {}
) is passed to the #createClient()
method, the node-soap
defaults (attributesKey: 'attributes'
, valueKey: '$value'
and xmlKey: '$xml'
) are used.
By default, node-soap
uses $value
as the key for any parsed XML value which may interfere with your other code as it
could be some reserved word, or the $
in general cannot be used for a key to start with.
You can define your own valueKey
by passing it in the wsdl_options
to the createClient call:
var wsdlOptions = {
valueKey: 'theVal'
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
// your code
});
By default, node-soap
uses $xml
as the key to pass through an XML string as is; without parsing or namespacing it. It overrides all the other content that the node might have otherwise had.
For example :
{
dom: {
nodeone: {
$xml: '<parentnode type="type"><childnode></childnode></parentnode>',
siblingnode: 'Cant see me.'
},
nodetwo: {
parentnode: {
attributes: {
type: 'type'
},
childnode: ''
}
}
}
};
could become
<tns:dom>
<tns:nodeone>
<parentnode type="type">
<childnode></childnode>
</parentnode>
</tns:nodeone>
<tns:nodetwo>
<tns:parentnode type="type">
<tns:childnode></tns:childnode>
</tns:parent>
</tns:nodetwo>
</tns:dom>
You can define your own xmlKey
by passing it in the wsdl_options
object to the createClient call:
var wsdlOptions = {
xmlKey: 'theXml'
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
// your code
});
By default, node-soap
uses attributes
as the key to define a nodes attributes.
{
parentnode: {
childnode: {
attributes: {
name: 'childsname'
},
$value: 'Value'
}
}
}
could become
<parentnode>
<childnode name="childsname">Value</childnode>
</parentnode>
However, attributes
may be a reserved key for some systems that actually want a node called attributes
<attributes>
</attributes>
You can define your own attributesKey
by passing it in the wsdl_options
object to the createClient call:
var wsdlOptions = {
attributesKey: '$attributes'
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
client.method({
parentnode: {
childnode: {
$attributes: {
name: 'childsname'
},
$value: 'Value'
}
}
});
});
In rare cases, you may want to precisely control the namespace definition that is included in the root element.
You can specify the namespace definitions by setting the overrideRootElement
key in the wsdlOptions
like so:
var wsdlOptions = {
overrideRootElement: {
namespace: 'xmlns:tns',
xmlnsAttributes: [{
name: 'xmlns:ns2',
value: "http://tempuri.org/"
}, {
name: 'xmlns:ns3',
value: "http://sillypets.com/xsd"
}]
}
};
To see it in practice, have a look at the sample files in: test/request-response-samples/addPets__force_namespaces
Sometimes it's useful to handle deserialization in your code instead of letting node-soap do it. For example if the soap response contains dates that are not in a format recognized by javascript, you might want to use your own function to handle them.
To do so, you can pass a customDeserializer
object in options
. The properties of this object are the types that your deserializer handles itself.
Example :
var wsdlOptions = {
customDeserializer = {
// this function will be used to any date found in soap responses
date: function (text, context) {
/* text is the value of the xml element.
context contains the name of the xml element and other infos :
{
name: 'lastUpdatedDate',
object: {},
schema: 'xsd:date',
id: undefined,
nil: false
}
*/
return text;
}
}
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
...
});
If an Element in a schema
definition depends on an Element which is present in the same namespace, normally the tns:
namespace prefix is used to identify this Element. This is not much of a problem as long as you have just one schema
defined
(inline or in a separate file). If there are more schema
files, the tns:
in the generated soap
file resolved mostly to the parent wsdl
file,
which was obviously wrong.
node-soap
now handles namespace prefixes which shouldn't be resolved (because it's not necessary) as so called ignoredNamespaces
which default to an Array of 3 Strings (['tns', 'targetNamespace', 'typedNamespace']
).
If this is not sufficient for your purpose you can easily add more namespace prefixes to this Array, or override it in its entirety
by passing an ignoredNamespaces
object within the options
you pass in soap.createClient()
method.
A simple ignoredNamespaces
object, which only adds certain namespaces could look like this:
var options = {
ignoredNamespaces: {
namespaces: ['namespaceToIgnore', 'someOtherNamespace']
}
}
This would extend the ignoredNamespaces
of the WSDL
processor to ['tns', 'targetNamespace', 'typedNamespace', 'namespaceToIgnore', 'someOtherNamespace']
.
If you want to override the default ignored namespaces you would simply pass the following ignoredNamespaces
object within the options
:
var options = {
ignoredNamespaces: {
namespaces: ['namespaceToIgnore', 'someOtherNamespace'],
override: true
}
}
This would override the default ignoredNamespaces
of the WSDL
processor to ['namespaceToIgnore', 'someOtherNamespace']
. (This shouldn't be necessary, anyways).
If you want to override the default ignored namespaces you would simply pass the following ignoredNamespaces
object within the options
:
var options = {
ignoredNamespaces: {
namespaces: ['namespaceToIgnore', 'someOtherNamespace'],
override: true
}
}
This would override the default ignoredNamespaces
of the WSDL
processor to ['namespaceToIgnore', 'someOtherNamespace']
. (This shouldn't be necessary, anyways).
If an Element in a schema
definition depends has a basenamespace defined but the request does not need that value, for example you have a "sentJob" with basenamespace "v20"
but the request need only: set in the tree structure, you need to set the ignoreBaseNameSpaces to true. This is set because in a lot of workaround the wsdl structure is not correctly
set or the webservice bring errors.
By default the attribute is set to true. An example to use:
A simple ignoredNamespaces
object, which only adds certain namespaces could look like this:
var options = {
ignoredNamespaces: true
}
Unit testing services that use soap clients can be very cumbersome. In order to get
around this you can use soap-stub
in conjunction with sinon
to stub soap with
your clients.
// test-initialization-script.js
var sinon = require('sinon');
var soapStub = require('soap/soap-stub');
var urlMyApplicationWillUseWithCreateClient = 'http://path-to-my-wsdl';
var clientStub = {
SomeOperation: sinon.stub()
};
clientStub.SomeOperation.respondWithError = soapStub.createErroringStub({..error json...});
clientStub.SomeOperation.respondWithSuccess = soapStub.createRespondingStub({..success json...});
soapStub.registerClient('my client alias', urlMyApplicationWillUseWithCreateClient, clientStub);
// test.js
var soapStub = require('soap/soap-stub');
describe('myService', function() {
var clientStub;
var myService;
beforeEach(function() {
clientStub = soapStub.getStub('my client alias');
soapStub.reset();
myService.init(clientStub);
});
describe('failures', function() {
beforeEach(function() {
clientStub.SomeOperation.respondWithError();
});
it('should handle error responses', function() {
myService.somethingThatCallsSomeOperation(function(err, response) {
// handle the error response.
});
});
});
});
- Author: Vinay Pulim
- Maintainers:
- All Contributors