started extracting the http layer

lib/couchrest.rb

@@ -45,6 +45,7 @@ module CouchRest
   autoload :ExtendedDocument,     'couchrest/more/extended_document'
   autoload :CastedModel,          'couchrest/more/casted_model'
   
+  require File.join(File.dirname(__FILE__), 'couchrest', 'core', 'http_abstraction')
   require File.join(File.dirname(__FILE__), 'couchrest', 'mixins')
   
   # The CouchRest module methods handle the basic JSON serialization 
@@ -118,9 +119,9 @@ module CouchRest
       }
     end
 
-    # set proxy for RestClient to use
+    # set proxy to use
     def proxy url
-      RestClient.proxy = url
+      HttpAbstraction.proxy = url
     end
 
     # ensure that a database exists
@@ -141,7 +142,7 @@ module CouchRest
     def put(uri, doc = nil)
       payload = doc.to_json if doc
       begin
-        JSON.parse(RestClient.put(uri, payload))
+        JSON.parse(HttpAbstraction.put(uri, payload))
       rescue Exception => e
         if $DEBUG
           raise "Error while sending a PUT request #{uri}\npayload: #{payload.inspect}\n#{e}"
@@ -153,7 +154,7 @@ module CouchRest
 
     def get(uri)
       begin
-        JSON.parse(RestClient.get(uri), :max_nesting => false)
+        JSON.parse(HttpAbstraction.get(uri), :max_nesting => false)
       rescue => e
         if $DEBUG
           raise "Error while sending a GET request #{uri}\n: #{e}"
@@ -166,7 +167,7 @@ module CouchRest
     def post uri, doc = nil
       payload = doc.to_json if doc
       begin
-        JSON.parse(RestClient.post(uri, payload))
+        JSON.parse(HttpAbstraction.post(uri, payload))
       rescue Exception => e
         if $DEBUG
           raise "Error while sending a POST request #{uri}\npayload: #{payload.inspect}\n#{e}"
@@ -177,11 +178,11 @@ module CouchRest
     end
   
     def delete uri
-      JSON.parse(RestClient.delete(uri))
+      JSON.parse(HttpAbstraction.delete(uri))
     end
     
     def copy uri, destination
-      JSON.parse(RestClient.copy(uri, {'Destination' => destination}))
+      JSON.parse(HttpAbstraction.copy(uri, {'Destination' => destination}))
     end
   
     def paramify_url url, params = {}

lib/couchrest/core/adapters/restclient.rb

@@ -0,0 +1,35 @@
+module RestClientAdapter
+   
+  module API
+    def proxy=(url)
+      RestClient.proxy = url
+    end 
+    
+    def proxy
+      RestClient.proxy
+    end
+  
+    def get(uri, headers={})
+      RestClient.get(uri, headers)
+    end
+  
+    def post(uri, payload, headers={})
+      RestClient.post(uri, payload, headers)
+    end
+  
+    def put(uri, payload, headers={})
+      RestClient.put(uri, payload, headers)
+    end
+  
+    def delete(uri, headers={})
+      RestClient.delete(uri, headers)
+    end
+  
+    def copy(uri, headers)
+      RestClient::Request.execute(  :method   => :copy,
+                                    :url      => uri,
+                                    :headers  => headers) 
+    end
+  end 
+  
+end

lib/couchrest/core/database.rb

@@ -58,7 +58,7 @@ module CouchRest
       keys = params.delete(:keys)
       funcs = funcs.merge({:keys => keys}) if keys
       url = CouchRest.paramify_url "#{@root}/_temp_view", params
-      JSON.parse(RestClient.post(url, funcs.to_json, {"Content-Type" => 'application/json'}))
+      JSON.parse(HttpAbstraction.post(url, funcs.to_json, {"Content-Type" => 'application/json'}))
     end
     
     # backwards compatibility is a plus
@@ -100,11 +100,8 @@ module CouchRest
     
     # GET an attachment directly from CouchDB
     def fetch_attachment(doc, name)
-      # slug = escape_docid(docid)        
-      # name = CGI.escape(name)
       uri = url_for_attachment(doc, name)
-      RestClient.get uri
-      # "#{@uri}/#{slug}/#{name}"
+      HttpAbstraction.get uri
     end
     
     # PUT an attachment directly to CouchDB
@@ -112,14 +109,14 @@ module CouchRest
       docid = escape_docid(doc['_id'])
       name = CGI.escape(name)
       uri = url_for_attachment(doc, name)
-      JSON.parse(RestClient.put(uri, file, options))
+      JSON.parse(HttpAbstraction.put(uri, file, options))
     end
     
     # DELETE an attachment directly from CouchDB
     def delete_attachment doc, name
       uri = url_for_attachment(doc, name)
       # this needs a rev
-      JSON.parse(RestClient.delete(uri))
+      JSON.parse(HttpAbstraction.delete(uri))
     end
     
     # Save a document to CouchDB. This will use the <tt>_id</tt> field from
@@ -146,7 +143,7 @@ module CouchRest
         slug = escape_docid(doc['_id'])
         begin     
           CouchRest.put "#{@root}/#{slug}", doc
-        rescue RestClient::ResourceNotFound
+        rescue HttpAbstraction::ResourceNotFound
           p "resource not found when saving even tho an id was passed"
           slug = doc['_id'] = @server.next_uuid
           CouchRest.put "#{@root}/#{slug}", doc
@@ -252,7 +249,7 @@ module CouchRest
     def recreate!
       delete!
       create!
-    rescue RestClient::ResourceNotFound
+    rescue HttpAbstraction::ResourceNotFound
     ensure
       create!
     end

lib/couchrest/core/document.rb

@@ -4,10 +4,6 @@ module CouchRest
   class Document < Response
     include CouchRest::Mixins::Attachments
     
-    # def self.inherited(subklass)
-    #   subklass.send(:extlib_inheritable_accessor, :database)
-    # end
-    
     extlib_inheritable_accessor :database
     attr_accessor :database
     

lib/couchrest/core/http_abstraction.rb

@@ -0,0 +1,48 @@
+require 'couchrest/core/adapters/restclient'
+
+# Abstraction layet for HTTP communications.
+#                                           
+# By defining a basic API that CouchRest is relying on,
+# it allows for easy experimentations and implementations of various libraries.
+# 
+# Most of the API is based on the RestClient API that was used in the early version of CouchRest.
+#
+module HttpAbstraction
+  
+  # here is the list of exception expected by CouchRest
+  # please convert the underlying errors in this set of known
+  # exceptions.
+  class ResourceNotFound < StandardError; end
+  class RequestFailed < StandardError; end
+  class RequestTimeout < StandardError; end
+  class ServerBrokeConnection < StandardError; end
+  class Conflict < StandardError; end
+  
+  
+  # # Here is the API you need to implement if you want to write a new adapter
+  # # See adapters/restclient.rb for more information.
+  #
+  # def self.proxy=(url)
+  # end
+  #      
+  # def self.proxy
+  # end
+  #
+  # def self.get(uri, headers=nil)
+  # end
+  # 
+  # def self.post(uri, payload, headers=nil)
+  # end
+  # 
+  # def self.put(uri, payload, headers=nil)
+  # end
+  # 
+  # def self.delete(uri, headers=nil)
+  # end
+  # 
+  # def self.copy(uri, headers)
+  # end    
+ 
+end
+
+HttpAbstraction.extend(RestClientAdapter::API)

lib/couchrest/mixins/views.rb

@@ -162,7 +162,7 @@ module CouchRest
           begin
             design_doc.view_on(db, view_name, opts, &block)
             # the design doc may not have been saved yet on this database
-          rescue RestClient::ResourceNotFound => e
+          rescue HttpAbstraction::ResourceNotFound => e
             if retryable
               save_design_doc_on(db)
               retryable = false

lib/couchrest/monkeypatches.rb

@@ -51,63 +51,63 @@ if RUBY_VERSION.to_f < 1.9
   end
 end
 
-module RestClient
-  def self.copy(url, headers={})
-    Request.execute(:method => :copy,
-      :url => url,
-      :headers => headers)
-  end
-
-#   class Request
+# module RestClient
+#   # def self.copy(url, headers={})
+#   #   Request.execute(:method => :copy,
+#   #     :url => url,
+#   #     :headers => headers)
+#   # end  
+# 
+# #   class Request
+# #     
+# #     def establish_connection(uri)
+# #       Thread.current[:connection].finish if (Thread.current[:connection] && Thread.current[:connection].started?)
+# #       p net_http_class
+# #       net = net_http_class.new(uri.host, uri.port)
+# #       net.use_ssl = uri.is_a?(URI::HTTPS)
+# #       net.verify_mode = OpenSSL::SSL::VERIFY_NONE
+# #       Thread.current[:connection] = net
+# #       Thread.current[:connection].start
+# #       Thread.current[:connection]
+# #     end
+# #     
+# #     def transmit(uri, req, payload)
+# #       setup_credentials(req)
+# #       
+# #       Thread.current[:host] ||= uri.host
+# #       Thread.current[:port] ||= uri.port
+# #       
+# #       if (Thread.current[:connection].nil? || (Thread.current[:host] != uri.host))
+# #         p "establishing a connection"
+# #         establish_connection(uri)
+# #       end
+# # 
+# #       display_log request_log
+# #       http = Thread.current[:connection]
+# #       http.read_timeout = @timeout if @timeout
+# #       
+# #       begin
+# #         res = http.request(req, payload)
+# #       rescue
+# #         p "Net::HTTP connection failed, reconnecting"
+# #         establish_connection(uri)
+# #         http = Thread.current[:connection]
+# #         require 'ruby-debug'
+# #         req.body_stream = nil
+# #         
+# #         res = http.request(req, payload)
+# #         display_log response_log(res)
+# #         result res
+# #       else
+# #         display_log response_log(res)
+# #         process_result res
+# #       end
+# #       
+# #     rescue EOFError
+# #       raise RestClient::ServerBrokeConnection
+# #     rescue Timeout::Error
+# #       raise RestClient::RequestTimeout
+# #     end
+# #   end
 #   
-#     def establish_connection(uri)
-#       Thread.current[:connection].finish if (Thread.current[:connection] && Thread.current[:connection].started?)
-#       p net_http_class
-#       net = net_http_class.new(uri.host, uri.port)
-#       net.use_ssl = uri.is_a?(URI::HTTPS)
-#       net.verify_mode = OpenSSL::SSL::VERIFY_NONE
-#       Thread.current[:connection] = net
-#       Thread.current[:connection].start
-#       Thread.current[:connection]
 # end 
-#     
-#     def transmit(uri, req, payload)
-#       setup_credentials(req)
-#       
-#       Thread.current[:host] ||= uri.host
-#       Thread.current[:port] ||= uri.port
-#       
-#       if (Thread.current[:connection].nil? || (Thread.current[:host] != uri.host))
-#         p "establishing a connection"
-#         establish_connection(uri)
-#       end
-# 
-#       display_log request_log
-#       http = Thread.current[:connection]
-#       http.read_timeout = @timeout if @timeout
-#       
-#       begin
-#         res = http.request(req, payload)
-#       rescue
-#         p "Net::HTTP connection failed, reconnecting"
-#         establish_connection(uri)
-#         http = Thread.current[:connection]
-#         require 'ruby-debug'
-#         req.body_stream = nil
-#         
-#         res = http.request(req, payload)
-#         display_log response_log(res)
-#         result res
-#       else
-#         display_log response_log(res)
-#         process_result res
-#       end
-#       
-#     rescue EOFError
-#       raise RestClient::ServerBrokeConnection
-#     rescue Timeout::Error
-#       raise RestClient::RequestTimeout
-#     end
-#   end
-  
-end

spec/couchrest/core/couchrest_spec.rb

@@ -191,7 +191,7 @@ describe CouchRest do
   describe "using a proxy for RestClient connections" do
     it "should set proxy url for RestClient" do
       CouchRest.proxy 'http://localhost:8888/'
-      proxy_uri = URI.parse(RestClient.proxy)
+      proxy_uri = URI.parse(HttpAbstraction.proxy)
       proxy_uri.host.should eql( 'localhost' )
       proxy_uri.port.should eql( 8888 )
       CouchRest.proxy nil