Ruby on Rails initializer to log Savon SOAP XML as pretty JSON instead. Also show what line of code called it.

example_output.txt

--------------------------------------------------

lib/foo.rb:22:in `save'
# foo.book

>> REQUEST:
{
  "CashBook_Book": {
    "cashBookHandle": {
      "Number": "14"
    }
  }
}

<< RESPONSE:
{
  "CashBook_BookResponse": {
    "xmlns": "http://e-conomic.com",
    "CashBook_BookResult": {
      "Number": "14"
    }
  }
}

--------------------------------------------------

savon.rb

# config/initializers/savon.rb

# Don't mention the adapter!
HTTPI.log = false

# Log pretty JSON instead of XML, and never mind URL and headers.
class Savon::SOAP::Request
  def log_request(url, headers, body)
    Savon.log ""
    log_calling_line
    Savon.log ""
    Savon.log ">> REQUEST:"
    log_soap_prettily body
  end

  def log_response(code, body)
    Savon.log ""
    Savon.log "<< RESPONSE:"
    log_soap_prettily body
    Savon.log ""
    Savon.log "-"*50
  end

  def log_calling_line
    calling_line = caller[1..-1].find { |line| line.include?(Rails.root.to_s) }
    calling_line.sub!(Rails.root.to_s + "/", "")
    file, line, _ = calling_line.split(":")
    code_line = File.readlines(file)[line.to_i - 1].strip
    Savon.log calling_line
    Savon.log "# #{code_line}"
  end

  def log_soap_prettily(soap)
    # depends on json gem
    hash = Hash.from_xml(soap)
    body = hash["Envelope"]["Body"]
    json = JSON.pretty_generate(body)
    Savon.log json
  end
end