Local options are passed to the client's #call method and are specific to a single request.



You might need to set this if you don't have a WSDL. Otherwise, Savon should set the proper SOAPAction HTTP header for you. If it doesn't, please open an issue and add the WSDL of your service.

client.call(:authenticate, soap_action: "urn:Authenticate")


Savon 2.0 tried to automatically handle cookies by storing the cookies from the last response and using them for the next request. This is wrong and it caused problems. Savon 2.1 does not set the "Cookie" header for you, but it makes it easy for you to handle cookies yourself.

response     = client.call(:authenticate, message: credentials)
auth_cookies = response.http.cookies

client.call(:find_user, message: { id: 3 }, cookies: auth_cookies)

This option accepts an Array of HTTPI::Cookie objects or any object that responds to cookies (like for example, an HTTPI::Response).



You probably want to add some arguments to your request. For simple XML which can easily be represented as a Hash, you can pass the SOAP message as a Hash. Savon uses Gyoku to translate the Hash into XML.

client.call(:authenticate, message: { username: 'luke', password: 'secret' })

For more complex XML structures, you can pass any other object that is not a Hash and responds to #to_s if you want to use a more specific tool to build your request.

class ServiceRequest

  def to_s
    builder = Builder::XmlMarkup.new
    builder.instruct!(:xml, encoding: "UTF-8")

    builder.person { |b|



client.call(:authenticate, message: ServiceRequest.new)


You can change the name of the SOAP message tag. If you need to use this option, please open an issue let me know why.

client.call(:authenticate, message_tag: :authenticationRequest)

This should be set by Savon if it has a WSDL. If it doesn't, it generates a message tag from the SOAP operation name. Here's how the option changes the request.



The attributes option accepts a Hash of XML attributes for the SOAP message tag.

client.call(:authenticate, :attributes => { "ID" => "ABC321" })

Here's what the request will look like.

    <tns:authenticationRequest ID="ABC321">

If you need to use this option, please open an issue and provide you WSDL for debugging. This should be handled automatically, but we need real world examples to do so.


Since v2.3.0 you can specify the SOAP header per request. When both the global and local option is used, Savon will merge the global with the local Hash.

client.call(:authenticate, :soap_header => { "OpToken" => "secret" })


If you need to, you can even shortcut Savon's Builder and send your very own XML.

client.call(:authenticate, xml: "<envelope><body></body></envelope>")



Savon by default tells Nori to use its "advanced typecasting" to convert XML values like "true" to TrueClass, dates to date objects, etc.

client.call(:authenticate, advanced_typecasting: false)


Savon defaults to Nori's Nokogiri parser. Nori ships with a REXML parser as an alternative. If you need to switch to REXML, please open an issue and describe the problem you have with the Nokogiri parser.

client.call(:authenticate, response_parser: :rexml)