ONVIF Camera (Axis) returning InvalidArgs when sending request with Savon

[migalenkom]

Bug report

Current behavior:

We are using the official ONVIF tool and it is generating this request which is working correctly:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://www.w3.org/2005/08/addressing" xmlns:tev="http://www.onvif.org/ver10/events/wsdl">
  <SOAP-ENV:Header>
    <wsa:Action>http://www.onvif.org/ver10/events/wsdl/PullPointSubscription/PullMessagesRequest</wsa:Action>
    <wsa:To>http://192.168.3.102/onvif/services</wsa:To>
    <dom0:SubscriptionId xmlns:dom0="http://www.example.com/2009/event">6</dom0:SubscriptionId>
  </SOAP-ENV:Header>
  <SOAP-ENV:Body>
    <tev:PullMessages>
      <tev:Timeout>PT5S</tev:Timeout>
      <tev:MessageLimit>1</tev:MessageLimit>
    </tev:PullMessages>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

We are trying to replicate the same with Savon, we are using this code:

require 'savon'

@ip.           = 'ip'
@user        = 'user'
@pass.      = 'pass'
@wsdl        = 'http://www.onvif.org/ver10/events/wsdl/event.wsdl'
@endpoint = 'http://192.168.11.64/onvif/event_service'
      
@soap_client = Savon.client do |c|
  c.wsdl wsdl
  c.endpoint @endpoint
  c.digest_auth(user, pass)
  c.use_wsa_headers true
  c.convert_request_keys_to :none
  c.env_namespace 'SOAP-ENV'
  c.open_timeout 60
  c.read_timeout 60
  c.soap_version 2
  c.headers 'Content-Type' => 'application/soap+xml; charset=utf-8'
  c.pretty_print_xml true
end
@soap_client.call(:pull_messages)

This code is generating this XML, which looks a little different:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tev="http://www.onvif.org/ver10/events/wsdl" xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:wsdl="http://docs.oasis-open.org/wsn/b-2" xmlns:dom0="http://www.example.com/2009/event">
  <SOAP-ENV:Header xmlns:wsa="http://www.w3.org/2005/08/addressing">
    <dom0:SubscriptionId>30</dom0:SubscriptionId>
    <wsa:Action>http://www.onvif.org/ver10/events/wsdl/PullPointSubscription/PullMessagesRequest</wsa:Action>
    <wsa:To>http://192.168.3.102/onvif/services</wsa:To>
    <wsa:MessageID xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing">urn:uuid:18cab322-913c-4270-9984-a8e801b95e14</wsa:MessageID>
  </SOAP-ENV:Header>
  <SOAP-ENV:Body>
    <tev:PullMessages>
      <tev:MessageLimit>1</tev:MessageLimit>
      <tev:Timeout>PT5S</tev:Timeout>
    </tev:PullMessages>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

When we send the SAVON version of the XML, the camera returns:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" xmlns:SOAP-ENC="http://www.w3.org/2003/05/soap-encoding" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:c14n="http://www.w3.org/2001/10/xml-exc-c14n#" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsa5="http://www.w3.org/2005/08/addressing" xmlns:wsrfbf="http://docs.oasis-open.org/wsrf/bf-2" xmlns:wstop="http://docs.oasis-open.org/wsn/t-1" xmlns:tt="http://www.onvif.org/ver10/schema" xmlns:wsrfr="http://docs.oasis-open.org/wsrf/r-2" xmlns:tev1="http://www.onvif.org/ver10/events/wsdl/NotificationProducerBinding" xmlns:tev2="http://www.onvif.org/ver10/events/wsdl/EventBinding" xmlns:tev3="http://www.onvif.org/ver10/events/wsdl/SubscriptionManagerBinding" xmlns:wsnt="http://docs.oasis-open.org/wsn/b-2" xmlns:tev4="http://www.onvif.org/ver10/events/wsdl/PullPointSubscriptionBinding" xmlns:tev="http://www.onvif.org/ver10/events/wsdl" xmlns:tns1="http://www.onvif.org/ver10/topics" xmlns:tnsaxis="http://www.axis.com/2009/event/topics" xmlns:ter="http://www.onvif.org/ver10/error">
  <SOAP-ENV:Header>
    <wsa5:RelatesTo>urn:uuid:a8271a37-60e5-47ea-a6ac-bfb988368da4</wsa5:RelatesTo>
    <wsa5:To SOAP-ENV:mustUnderstand="true">http://www.w3.org/2005/08/addressing/anonymous</wsa5:To>
  </SOAP-ENV:Header>
  <SOAP-ENV:Body>
    <SOAP-ENV:Fault>
      <SOAP-ENV:Code>
        <SOAP-ENV:Value>SOAP-ENV:Sender</SOAP-ENV:Value>
        <SOAP-ENV:Subcode>
          <SOAP-ENV:Value>ter:InvalidArgs</SOAP-ENV:Value>
        </SOAP-ENV:Subcode>
      </SOAP-ENV:Code>
      <SOAP-ENV:Reason>
        <SOAP-ENV:Text xml:lang="en"/>
      </SOAP-ENV:Reason>
    </SOAP-ENV:Fault>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Do you have any ideas about what could be causing the issue? - We are tearing our hair out, thank you!

Steps to reproduce current behavior:

Expected behavior:
request passed OK

System information:

• ruby version: 3.1
• savon version: 2.12.1

[Dounx]

@michaelklishin Do you find any solution?

[migalenkom]

Hi, @Dounx as far as I remember there needs to add namespaces.

{ namespaces: { 'xmlns:wsdl' => "http://docs.oasis-open.org/wsn/b-2",
                'xmlns:dom0' => "http://www.axis.com/2009/event" } 
}

[Dounx]

Where to add this namespaces?

I am trying to call some ONVIF PTZ Interface

class PTZClient
  attr_reader :client

  def initialize(endpoint, username, password)
    @client = Savon.client do |c|
      c.wsdl "https://www.onvif.org/ver20/ptz/wsdl/ptz.wsdl"
      c.endpoint endpoint
      c.wsse_auth(username, password, :digest)
    end
  end

  def presets(token)
    client.call(:get_presets, message: { profile_token: token })
  end
end

tokens = ["profileToken1"]
endpoint = "xxx"
username = "xxx"
password = "xxx"

ptz_client = PTZClient.new(endpoint, username, password)
presets = ptz_client.presets(tokens.first)
p presets

But I also get this error: (env:Sender) the parameter value is illegal (Savon::SOAPFault)

Any idea?

[Dounx]

OK, It's my code issue.

I forget add convert_request_keys_to :camelcase option