Error calling a SOAP service from within a Rails controller


#1

The following works fine as a standalone ruby program:


t = Time.now
starter = Time.local(t.year,t.mon, t.day) + (24 *3600)
ender = starter + 7 * 24 *3600
lat = 40.352039
lon = -74.191961

require ‘soap/wsdlDriver’

params = {:maxt => false, :mint => false, :temp => true, :dew => false,
:pop12 => false, :qpf => false, :sky => false, :snow => false,
:wspd => false, :wdir => false, :wx => false, :waveh => false,
:icons => false, :rh => false, :appt => true}

wsdl = “http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/ndfdXML.wsdl
drv = SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver
drv.wiredump_dev = STDOUT if $DEBUG
dwml = drv.NDFDgen(lat, lon, ‘time-series’, starter, ender, params)
puts dwml
require ‘xsd/mapping’
data = XSD::Mapping.xml2obj(dwml).data


However, when I try to call the same from within a ruby controller, I
get:

SOAP::HTTPStreamError (502: Bad Gateway):
c:/ruby-1.8.4/lib/ruby/1.8/soap/streamHandler.rb:200:in send_post' c:/ruby-1.8.4/lib/ruby/1.8/soap/streamHandler.rb:109:insend’
c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/proxy.rb:170:in route' c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/proxy.rb:141:incall’
c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/driver.rb:178:in call' c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/driver.rb:232:innDFDgen’
c:/ruby-1.8.4/lib/ruby/1.8/soap/wsdlDriver.rb:117:in `NDFDgen’

The code in my controller is:


   def get_weather
            lat = params[:lat]
            lon = params[:lon]

            t = Time.now
            starter = Time.local(t.year,t.mon, t.day) + (24 *3600)
            ender = starter + 7 * 24 *3600

            params = {:maxt => false, :mint => false, :temp =>

true, :dew => false,
:pop12 => false, :qpf => false, :sky => false,
:snow => false,
:wspd => false, :wdir => false, :wx => false,
:waveh => false,
:icons => false, :rh => false, :appt => true}

            wsdl =

http://www.weather.gov/forecasts/xml/DWMLgen/wsdl/ndfdXML.wsdl
drv =
SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver
drv.wiredump_dev = STDOUT if $DEBUG
dwml = drv.NDFDgen(lat, lon, ‘time-series’, starter,
ender, params)

            @data = XSD::Mapping.xml2obj(dwml).data

    end


#2

When you’re playing with SOAP in Rails, I think you want to use
ActionWebService. See:
http://rails.rubyonrails.com/classes/ActionWebService/Client/Soap.html

For Rails specific questions such as this, try the Rails mailing list,
at http://lists.rubyonrails.org/mailman/listinfo/rails or
http://www.ruby-forum.com/forum/3


#3

thanks, I’ve tried using ActionWebService::Client::SOAP, but I get the
same error (pretty much), here’s the version of the method within my
Controller that used ActionWebService:

def get_weather
lat = params[:lat]
lon = params[:lon]
t = Time.now
starter = Time.local(t.year,t.mon, t.day) + (24 *3600)
ender = starter + 7 * 24 *3600

	params = WeatherParametersType.new({:maxt => false, :mint => false,

:temp => true, :dew => false,
:pop12 => false, :qpf => false, :sky => false, :snow => false,
:wspd => false, :wdir => false, :wx => false, :waveh => false,
:icons => false, :rh => false, :appt => true})

  	soap_client = ActionWebService::Client::Soap.new(WeatherAPI,

http://www.weather.gov/forecasts/xml/SOAP_server/ndfdXMLserver.php”)
@dwml = soap_client.NDFDgen(lat, lon, ‘time-series’, starter, ender,
params)
@data = @dwml
end

and I’m using these classes I’ve defined:

class WeatherParametersType < ActionWebService::Struct
member :maxt, :boolean
member :mint, :boolean
member :temp, :boolean
member :dew, :boolean
member :pop12, :boolean
member :qpf, :boolean
member :sky, :boolean
member :snow, :boolean
member :wspd, :boolean
member :wdir, :boolean
member :wx, :boolean
member :waveh, :boolean
member :icons, :boolean
member :rh, :boolean
member :appt, :boolean
end

class WeatherAPI < ActionWebService::API::Base
api_method :NDFDgen, :expects => [[Float], [Float], [String], [Time],
[Time], [WeatherParametersType]], :returns => [String]
end

The error stack trace:

SOAP::HTTPStreamError (502: Bad Gateway):
c:/ruby-1.8.4/lib/ruby/1.8/soap/streamHandler.rb:200:in send_post' c:/ruby-1.8.4/lib/ruby/1.8/soap/streamHandler.rb:109:insend’
c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/proxy.rb:170:in route' c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/proxy.rb:141:incall’
c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/driver.rb:178:in call' c:/ruby-1.8.4/lib/ruby/1.8/soap/rpc/driver.rb:232:inNDFDgen’
c:/ruby-1.8.4/lib/ruby/gems/1.8/gems/actionwebservice-1.0.0/lib/action_web_s
ervice/client/soap_client.rb:61:in perform_invocation' c:/ruby-1.8.4/lib/ruby/gems/1.8/gems/actionwebservice-1.0.0/lib/action_web_s ervice/client/base.rb:15:inmethod_missing’


#4

well it turns out I was passing bad parameters to the service. weird
response though…