README
Soap
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
Where can I file an issue?
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.
If you're in need of support we encourage you to join us and other node-soap
users on gitter:
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);
});
});
Options
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. - request: to override the request module.
- httpClient: to provide your own http client that implements
request(rurl, data, callback, exheaders, exoptions)
. - forceSoap12Headers: to set proper headers for SOAP v1.2
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
})
},
// This is how to receive incoming headers
HeadersAwareFunction: function(args, cb, headers) {
return {
name: headers.Token
};
}
// You can also inspect the original `req`
reallyDeatailedFunction: function(args, cb, headers, req) {
console.log('SOAP `reallyDeatailedFunction` request from ' + req.connection.remoteAddress)
return {
name: headers.Token
};
}
}
}
}
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 Events
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.
SOAP Fault
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
}
};
SOAP Headers
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).
Server security example using PasswordDigest
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');
};
Server connection authorization
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
};
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 torequest
toXML
- a method that returns 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 soap.WSSecurity('username', 'password'))
BearerSecurity
client.setSecurity(new soap.BearerSecurity('token'));
Client.method(args, callback) - call method on the SOAP service.
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
})
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
})
Overriding the namespace prefix
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})
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 namespacexmlns
URI
Client.lastRequest - the property that contains last full soap request for client logging
Client Events
Client instances emit the following events:
- request - Emitted before a request is sent. The event handler receives the entire Soap request (Envelope) including headers.
- 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.
- soapError - Emitted when an erroneous response is received. Useful if you want to globally log errors.
- response - Emitted after a response is received. The event handler receives the entire response body. This is emitted for all responses (both success and errors).
WSSecurity
WSSecurity implements WS-Security. UsernameToken and PasswordText/PasswordDigest is supported. An instance of WSSecurity is passed to Client.setSecurity.
new WSSecurity(username, password, options)
//the 'options' object is optional and contains properties:
//passwordType: 'PasswordDigest' or 'PasswordText' default is PasswordText
//hasTimeStamp: true or false default is true
Handling XML Attributes, Value and XML (wsdlOptions).
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.
value
key
Overriding the By default, node-soap
uses $value
as 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 like so:
var wsdlOptions = {
valueKey: 'theVal'
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
// your code
});
xml
key
Overriding the As valueKey
, node-soap
uses $xml
as key. The xml key is used to pass XML Object without adding namespace or parsing the string.
Example :
dom = {
$xml: '<parentnode type="type"><childnode></childnode></parentnode>'
};
<tns:dom>
<parentnode type="type">
<childnode></childnode>
</parentnode>
</tns:dom>
You can define your own xmlKey
by passing it in the wsdl_options
to the createClient call like so:
var wsdlOptions = {
xmlKey: 'theXml'
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
// your code
});
attributes
key
Overriding the You can achieve attributes like:
<parentnode>
<childnode name="childsname">
</childnode>
</parentnode>
By attaching an attributes object to a node.
{
parentnode: {
childnode: {
attributes: {
name: 'childsname'
}
}
}
}
However, "attributes" may be a reserved key for some systems that actually want a node
<attributes>
</attributes>
In this case you can configure the attributes key in the wsdlOptions
like so.
var wsdlOptions = {
attributesKey: '$attributes'
};
soap.createClient(__dirname + '/wsdl/default_namespace.wsdl', wsdlOptions, function (err, client) {
client.*method*({
parentnode: {
childnode: {
$attributes: {
name: 'childsname'
}
}
}
});
});
Handling "ignored" namespaces
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).
Handling "ignoreBaseNameSpaces" attribute
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:
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
}
soap-stub
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.
Example
// 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.createRespondingStub({..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.
});
});
});
});
Contributors
- Author: Vinay Pulim
- Maintainers:
- All Contributors