CWMP Envelope: Encode and Decode with Caretaker

Setup

Mix.install([
  {:caretaker, path: "."}
])

alias Caretaker.CWMP.SOAP
require Logger

Encode an InformResponse body and wrap in SOAP 1.1

{:ok, body} =
  Caretaker.TR069.RPC.InformResponse.encode(
    %Caretaker.TR069.RPC.InformResponse{max_envelopes: 1}
  )

{:ok, env} =
  SOAP.encode_envelope(body, %{id: "abc123", cwmp_ns: "urn:dslforum-org:cwmp-1-0"})

tests = %{
  envelope: String.contains?(env, "soapenv:Envelope"),
  cwmp_ns: String.contains?(env, "xmlns:cwmp=\"urn:dslforum-org:cwmp-1-0\""),
  id_echo: String.contains?(env, "abc123")
}

Logger.info("Envelope checks=#{inspect(tests)}")
IO.iodata_to_binary(env)

Decode the envelope

{:ok, %{header: %{id: id, cwmp_ns: ns}, body: %{rpc: rpc, xml: rpc_xml}}} =
  SOAP.decode_envelope(env)

validations = %{
  id_ok: id == "abc123",
  ns_ok: ns == "urn:dslforum-org:cwmp-1-0",
  rpc_ok: rpc == "InformResponse",
  rpc_xml_present: is_binary(rpc_xml) and byte_size(rpc_xml) > 0
}

Logger.info("Decode validations=#{inspect(validations)}")
{id, ns, rpc}

Content-Type helper

SOAP.content_type()