First version of the Client library for the EC2 Query Clients

git-svn-id: http://svn.opennebula.org/one/trunk@721 3034c82b-c49b-4eb3-8279-a7acafdc01c0

src/oca/ec2/lib/EC2QueryClient.rb

@@ -0,0 +1,175 @@
+#!/usr/bin/ruby
+
+require 'pp'
+
+require 'rubygems'
+require 'EC2'
+require 'curb'
+require 'uri'
+require 'OpenNebula'
+
+module EC2QueryClient
+    ###########################################################################
+    #
+    #
+    ###########################################################################
+    class Client
+
+        API_VERSION = '2008-12-01'
+        
+        #######################################################################
+        #
+        #
+        #######################################################################
+        def initialize(secret=nil, endpoint="http://127.0.0.1:4567")
+            if secret
+                ec2auth = secret
+            elsif ENV["ONE_AUTH"]
+                ec2auth = ENV["ONE_AUTH"]
+            end
+
+            ec2auth=~/(\w+):(\w+)/
+            
+            @access_key_id     = $1
+            @access_key_secret = Digest::SHA1.hexdigest($2)
+
+            @uri = URI.parse(endpoint)
+
+            if !@uri.scheme or @uri.scheme != "http"
+                raise "Only http protocol supported"
+            elsif !@uri.host
+                raise "Wrong URI format, host not found"
+            end
+
+            @ec2_connection = EC2::Base.new(
+                :access_key_id     => @access_key_id,
+                :secret_access_key => @access_key_secret,
+                :server            => @uri.host,
+                :port              => @uri.port,
+                :use_ssl           => false)
+        end
+
+        #######################################################################
+        #
+        #
+        #######################################################################
+        def describe_instances()
+            begin
+                response = @ec2_connection.describe_instances
+            rescue Exception => e
+                error = OpenNebula::Error.new(e.message)
+                return error
+            end
+            
+            return response
+        end
+
+        #######################################################################
+        # :image_id
+        # :instance_type
+        #######################################################################
+        def run_instances(ami_id, type)
+            begin
+                response = @ec2_connection.run_instances(
+                                :image_id      => ami_id,
+                                :min_count     => 1,
+                                :max_count     => 1,
+                                :instance_type => type
+                           )            
+            rescue Exception => e
+                error = OpenNebula::Error.new(e.message)
+                return error
+            end
+            
+            return response
+        end
+
+        #######################################################################
+        #
+        #
+        #######################################################################
+        def terminate_instances(instance_id)
+            begin
+                response = @ec2_connection.terminate_instances(
+                    :instance_id   => instance_id
+                 )
+            rescue Exception => e
+                error = OpenNebula::Error.new(e.message)
+                return error
+            end
+            
+            return response
+        end
+
+        #######################################################################
+        #
+        #  Returns true if HTTP code is 200, 
+        #######################################################################
+        def upload_image(file_name)
+            params = { "Action"           => "UploadImage",
+                       "SignatureVersion" => "2",
+                       "SignatureMethod"  => 'HmacSHA1',
+                       "AWSAccessKeyId"   => @access_key_id,
+                       "Version"          => API_VERSION,
+                       "Timestamp"        => Time.now.getutc.iso8601 }
+
+            str = EC2.canonical_string(params, @uri.host)
+            sig = EC2.encode(@access_key_secret, str, false)
+   
+            post_fields = Array.new;
+
+            params.each { |k,v|
+                post_fields << Curl::PostField.content(k,v)
+            }
+
+            post_fields << Curl::PostField.content("Signature",sig)
+            post_fields << Curl::PostField.file("file",file_name)
+
+            connection = Curl::Easy.new(@uri.to_s)
+            connection.multipart_form_post = true
+
+            connection.http_post(*post_fields)
+
+            if connection.response_code == 200
+                return EC2::Response.parse(:xml => connection.body_str)
+            else
+                return OpenNebula::Error.new(connection.body_str)
+            end
+        end
+
+        #######################################################################
+        #
+        #
+        #######################################################################
+        def register_image(image_id)
+            begin
+               response = @ec2_connection.register_image(
+                            :image_location => image_id
+                          )
+            rescue Exception => e
+                error = OpenNebula::Error.new(e.message)
+                return error
+            end
+            
+            return response
+        end
+
+        #######################################################################
+        # :image_id --> ALL
+        # :owner_id --> mine (ALWAYS)
+        # :executable_by --> Always Public (NO ACLS)
+        #######################################################################
+        def describe_images()
+            begin
+                response = @ec2_connection.describe_images
+            rescue Exception => e
+                error = OpenNebula::Error.new(e.message)
+                return error
+            end
+            
+            return response
+        end
+    end
+end
+
+