Ruby httpclient: 'create_request': undefined method 'each' - ruby

Question

I'm green when it comes to Ruby. Right now I'm mucking about with a script which connects to the Terremark eCloud API Explorer. I'm trying to use the httpclient gem, but I'm a bit confused as to how I'm supposed to construct my client.
#!/usr/bin/ruby
require "httpclient"
require 'base64'
require 'hmac-sha1'
require 'openssl'
# Method definitions
def get_date
# Get the time and date in the necessary format
result = Time.now.strftime('%a, %d %b %Y %H:%M:%S GMT')
end
def get_signature(action,date,headers,resource,user,pass)
string_to_sign = "#{action}
#{date}
#{headers}
#{resource}\n"
return Base64.encode64(OpenSSL::HMAC.digest('sha1', "#{user}:#{pass}", "#{string_to_sign}"))
end
# Initial variables
date = get_date
domain = "https://services.enterprisecloud.terremark.com"
password = 'password'
query = {}
tmrk_headers = Hash.new
tmrk_headers['x-tmrk-date: '] = date
tmrk_headers['x-tmrk-version: '] = '2013-06-01'
uri = '/cloudapi/spec/networks/environments/1'
url = "#{domain}#{uri}"
username = 'user#terremark.com'
verb = 'GET'
signature = get_signature(verb,date,tmrk_headers,uri,username,password)
tmrk_headers['Authorization: '] = "Basic \"#{signature}\""
puts signature
client = HTTPClient.new
client.get_content(url,query,tmrk_headers)
EDIT: This is no longer valid as I've moved beyond this error with some help:
Right now I'm not concerned about seeing what is returned from the connection. I'm just looking to create an error-free run. For instance, if I run the script without the client.get_content line it will return to a prompt without issue (giving me the impression that everything ran cleanly, if not uselessly).
How am I supposed to construct this? The httpclient documentation uses the example with external headers:
extheader = [['Accept', 'image/jpeg'], ['Accept', 'image/png']]
clnt.get_content(uri, query, extheader)
I'm making the assumption that the query is the URI that I've defined.
In all reality, it isn't set up right in the first place. I need to be able to include the string in the auth_header variable in the string to be signed but the signature is actually part of the variable. I've obviously created a hole in that regard.
Any assistance with this will be more than appreciated.
EDIT2: Removed strace pastebin. Adding Ruby backtrace:
/home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:1023:in `create_request': undefined method `each' for #<String:0x0000000207d1e8> (NoMethodError)
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:884:in `do_request'
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:959:in `follow_redirect'
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:594:in `get_content'
from ./test.rb:42:in `<main>'
EDIT3: Updated script; adding further backtrace after making necessary script modifications:
/
home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:975:in `success_content': unexpected response: #<HTTP::Message::Headers:0x00000001dddc58 #http_version="1.1", #body_size=0, #chunked=false, #request_method="GET", #request_uri=#<URI::HTTPS:0x00000001ddecc0 URL:https://services.enterprisecloud.terremark.com/cloudapi/spec/networks/environments/1>, #request_query={}, #request_absolute_uri=nil, #status_code=400, #reason_phrase="Bad Request", #body_type=nil, #body_charset=nil, #body_date=nil, #body_encoding=#<Encoding:US-ASCII>, #is_request=false, #header_item=[["Content-Type", "text/html; charset=us-ascii"], ["Server", "Microsoft-HTTPAPI/2.0"], ["Date", "Thu, 27 Mar 2014 23:12:53 GMT"], ["Connection", "close"], ["Content-Length", "339"]], #dumped=false> (HTTPClient::BadResponseError)
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:594:in `get_content'
from ./test.rb:52:in `<main>'

Answer 1

The issue that you're having as stated by your backtrace
/home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:1023:in `create_request': undefined method `each' for #<String:0x0000000207d1e8> (NoMethodError)
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:884:in `do_request'
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:959:in `follow_redirect'
from /home/msnyder/.rvm/gems/ruby-2.1.1/gems/httpclient-2.3.4.1/lib/httpclient.rb:594:in `get_content'
from ./test.rb:42:in `<main>'
is that it seems like you're passing a String object to one of the arguments in get_content where it expects an object that responds to the method each.
From looking at the documentation of httpclient#get_content http://www.ruby-doc.org/gems/docs/h/httpclient-xaop-2.1.6/HTTPClient.html#method-i-get_content
It expects the second parameter to be a Hash or Array of arguments
From your code sample and showing only the relevant parts
uri = '/cloudapi/spec/networks/environments/1'
url = "https://services.enterprisecloud.terremark.com"
tmrk_headers = "x-tmrk-date:\"#{date}\"\nx-tmrk-version:2014-01-01"
auth_header = "Authorization: CloudApi AccessKey=\"#{access_key}\" SignatureType=\"HmacSHA1\" Signature=\"#{signature}\""
full_header = "#{tmrk_headers}\n#{auth_header}"
client = HTTPClient.new
client.get_content(url,uri,full_header)
There are two things that I see wrong with your code.
You're passing in a String value for the query. Specifically, you're passing in uri which has a value of what I'm assuming is the path that you want to hit.
For the extra headers parameter, you're passing in a String value which is in the full_header
What you need to do in order to fix this is pass in the full url for the first parameter.
This means it should look something like this:
url = "https://services.enterprisecloud.terremark.com/cloudapi/spec/networks/environments/1"
query = {} # if you have any parameters to pass in they should be here.
headers = {
"x-tmrk-date" => date, "x-tmrk-version" => "2014-01-01",
"Authorization" => "CloudApi AccessKey=#{access_key} SignatureType=HmacSHA1 Signature=#{signature}"
}
client = HTTPClient.new
client.get_content(url, query, headers)