Connect Ruby to Salesforce via OAuth

salesforce_oauth_first.rb

require 'oauth'

consumer_key    = '...' # from SalesForce
consumer_secret = '...' # from SalesForce

oauth_options = {
  :site               => 'https://login.salesforce.com',
  :scheme             => :body,
  :request_token_path => '/_nc_external/system/security/oauth/RequestTokenHandler',
  :authorize_path     => '/setup/secur/RemoteAccessAuthorizationPage.apexp',
  :access_token_path  => '/_nc_external/system/security/oauth/AccessTokenHandler',
}

consumer = OAuth::Consumer.new consumer_key, consumer_secret, oauth_options
# consumer.http.set_debug_output STDERR # if you're curious

request       = consumer.get_request_token
authorize_url = request.authorize_url :oauth_consumer_key => consumer_key

puts "Go to #{authorize_url} in your browser, then enter the verification code:"
verification_code = gets.strip

access = request.get_access_token :oauth_verifier => verification_code

puts "Access Token:  " + access.token
puts "Access Secret: " + access.secret

salesforce_oauth_second.rb

require 'oauth'
require 'rexml/document'

consumer_key    = '...' # from SalesForce
consumer_secret = '...' # from SalesForce
access_token    = '...' # from the previous step
access_secret   = '...' # from the previous step

# Log in and request a URL/session.
consumer  = OAuth::Consumer.new consumer_key, consumer_secret
access    = OAuth::AccessToken.new consumer, access_token, access_secret
login_url = 'https://login.salesforce.com/services/OAuth/u/20.0'
result    = access.post login_url, '', {'content-type' => 'application/x-www-form-urlencoded'}

# Parse the URL/session.
doc = REXML::Document.new result.body
session_id = doc.elements['*/sessionId'].text
server_url = doc.elements['*/serverUrl'].text

# The part of the request that isn't boilerplate:
body = <<HERE
<search xmlns="urn:partner.soap.sforce.com">
  <searchString>find {McFakerson Co} in name fields returning account(id)</searchString>
</search>
HERE

# The rest (sigh).
request = <<HERE
<?xml version=\"1.0" encoding="utf-8" ?>
<soap:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:partner="urn:partner.soap.sforce.com">
  <soap:Header>
    <partner:SessionHeader soap:mustUnderstand='1'>
      <partner:sessionId>#{session_id}</partner:sessionId>
    </partner:SessionHeader>
  </soap:Header>
  <soap:Body>
    #{body}
  </soap:Body>
</soap:Envelope>
HERE

headers = {
  'Content-Type' => 'text/xml',
  'SOAPAction' => '""',
}

# Finally, we can make the request...
result = access.post server_url, request, headers

# ... and parse the response.
doc       = REXML::Document.new result.body
result_id = doc.elements['*/*/*/*/*/*/sf:Id'].text
puts "First matching ID: #{result_id}"