Merge pull request #4 from azul/refactor/separate-em-server

refactor: separate em specifics from generic server

6 files changed, 160 insertions, 116 deletions

diff --git a/lib/nickserver/couch_db/source.rb b/lib/nickserver/couch_db/source.rb
index 874fe4f..b30fdfc 100644
--- a/lib/nickserver/couch_db/source.rb
+++ b/lib/nickserver/couch_db/source.rb
@@ -1,18 +1,15 @@
 #
 # This class allows querying couch for public keys.
 #
+require 'nickserver/source'
 require 'nickserver/couch_db/response'
 require 'nickserver/config'
 
 module Nickserver::CouchDB
-  class Source
+  class Source < Nickserver::Source
 
     VIEW = '/_design/Identity/_view/pgp_key_by_email'
 
-    def initialize(adapter)
-      @adapter = adapter
-    end
-
     def query(nick)
       adapter.get url, query: query_for(nick) do |status, body|
         yield Response.new(nick, status: status, body: body)
@@ -29,11 +26,6 @@ module Nickserver::CouchDB
       { reduce: "false", key: "\"#{nick}\"" }
     end
 
-    def adapter
-      @adapter
-      # Nickserver::Adapters::Http.new(config)
-    end
-
     attr_reader :config
   end
 end
diff --git a/lib/nickserver/em_server.rb b/lib/nickserver/em_server.rb
new file mode 100644
index 0000000..bcec4cd
--- /dev/null
+++ b/lib/nickserver/em_server.rb
@@ -0,0 +1,51 @@
+require 'eventmachine'
+silence_warnings do
+  require 'evma_httpserver'
+end
+require 'nickserver/request_handler'
+
+module Nickserver
+  class EmServer < EM::Connection
+    include EM::HttpServer
+
+    def self.start(options = {})
+      EventMachine.run do
+        EM.start_server options[:host], options[:port], self
+      end
+    end
+
+    def post_init
+      super
+      no_environment_strings
+    end
+
+    def process_http_request
+      handler.respond_to params, @http_headers
+    end
+
+    def send_response(options = {})
+      response = EM::DelegatedHttpResponse.new(self)
+      response.status = options[:status]
+      response.content_type options[:content_type]
+      response.content = options[:content]
+      silence_warnings do
+        response.send_response
+      end
+    end
+
+    private
+
+    def handler
+      @handler ||= RequestHandler.new(self, Nickserver::Adapters::EmHttp.new)
+    end
+
+    def params
+      if @http_query_string
+        CGI.parse(@http_query_string)
+      elsif @http_post_content
+        CGI.parse(@http_post_content)
+      end
+    end
+
+  end
+end
diff --git a/lib/nickserver/hkp/source.rb b/lib/nickserver/hkp/source.rb
index cae3e01..8b2a62b 100644
--- a/lib/nickserver/hkp/source.rb
+++ b/lib/nickserver/hkp/source.rb
@@ -11,11 +11,7 @@ require "nickserver/hkp/key_info"
 #
 
 module Nickserver; module Hkp
-  class Source
-
-    def initialize(adapter)
-      @adapter = adapter
-    end
+  class Source < Nickserver::Source
 
     def query(nick, &block)
       search(nick) do |status, response|
@@ -37,8 +33,6 @@ module Nickserver; module Hkp
 
     protected
 
-    attr_reader :adapter
-
     #
     # for now, just pick the newest key.
     #
diff --git a/lib/nickserver/request_handler.rb b/lib/nickserver/request_handler.rb
new file mode 100644
index 0000000..26b6ec1
--- /dev/null
+++ b/lib/nickserver/request_handler.rb
@@ -0,0 +1,85 @@
+module Nickserver
+  class RequestHandler
+
+    def initialize(responder, adapter)
+      @responder = responder
+      @adapter = adapter
+    end
+
+    def respond_to(params, headers)
+      uid = get_uid_from_params(params)
+      if uid.nil?
+        send_not_found
+      elsif uid !~ EmailAddress
+        send_error("Not a valid address")
+      else
+        send_key(uid, headers)
+      end
+    rescue RuntimeError => exc
+      puts "Error: #{exc}"
+      puts exc.backtrace
+      send_error(exc.to_s)
+    end
+
+    protected
+
+    def get_uid_from_params(params)
+      if params && params["address"] && params["address"].any?
+        return params["address"].first
+      else
+        return nil
+      end
+    end
+
+    def send_key(uid, headers)
+      if local_address?(uid, headers)
+        source = Nickserver::CouchDB::Source.new(adapter)
+      else
+        source = Nickserver::Hkp::Source.new(adapter)
+      end
+      source.query(uid) do |response|
+        send_response(status: response.status, content: response.content)
+      end
+    end
+
+    #
+    # Return true if the user address is for a user of this service provider.
+    # e.g. if the provider is example.org, then alice@example.org returns true.
+    #
+    # If 'domain' is not configured, we rely on the Host header of the HTTP request.
+    #
+    def local_address?(uid, headers)
+      uid_domain = uid.sub(/^.*@(.*)$/, "\\1")
+      if Config.domain
+        return uid_domain == Config.domain
+      else
+        # no domain configured, use Host header
+        host_header = headers.split(/\0/).grep(/^Host: /).first
+        if host_header.nil?
+          send_error("HTTP request must include a Host header.")
+        else
+          host = host_header.split(':')[1].strip.sub(/^nicknym\./, '')
+          return uid_domain == host
+        end
+      end
+    end
+    def send_error(msg = "not supported")
+      send_response(status: 500, content: "500 #{msg}\n")
+    end
+
+    def send_not_found(msg = "Not Found")
+      send_response(status: 404, content: "404 #{msg}\n")
+    end
+
+    def send_response(opts = {})
+      responder.send_response default_response.merge(opts)
+    end
+
+    def default_response
+      {status: 200, content_type: 'text/plain', content: ''}
+    end
+
+    attr_reader :responder, :adapter
+
+  end
+end
diff --git a/lib/nickserver/server.rb b/lib/nickserver/server.rb
index 2453f94..174d6ac 100644
--- a/lib/nickserver/server.rb
+++ b/lib/nickserver/server.rb
@@ -1,9 +1,6 @@
 require 'kernel_ext'
-require 'eventmachine'
-silence_warnings do
-  require 'evma_httpserver'
-end
 require 'json'
+require 'nickserver/em_server'
 require 'nickserver/couch_db/source'
 require 'nickserver/hkp/source'
 require 'nickserver/adapters/em_http'
@@ -15,8 +12,7 @@ require 'nickserver/adapters/em_http'
 # For info on EM::HttpServer, see https://github.com/eventmachine/evma_httpserver
 #
 module Nickserver
-  class Server < EM::Connection
-    include EM::HttpServer
+  class Server
 
     #
     # Starts the Nickserver. Must be run inside an EM.run block.
@@ -28,105 +24,18 @@ module Nickserver
     #
     def self.start(opts={})
       Nickserver::Config.load
-      options = {host: '127.0.0.1', port: Nickserver::Config.port.to_i}.merge(opts)
+      options = {
+        host: '127.0.0.1',
+        port: Nickserver::Config.port.to_i
+      }.merge(opts)
+
       unless defined?(TESTING)
         puts "Starting nickserver #{options[:host]}:#{options[:port]}"
       end
-      EM.start_server options[:host], options[:port], Nickserver::Server
-    end
-
-    def post_init
-      super
-      no_environment_strings
-    end
 
-    def process_http_request
-      uid = get_uid_from_request
-      if uid.nil?
-        send_not_found
-      elsif uid !~ EmailAddress
-        send_error("Not a valid address")
-      else
-        send_key(uid)
-      end
-    rescue RuntimeError => exc
-      puts "Error: #{exc}"
-      puts exc.backtrace
-      send_error(exc.to_s)
+      Nickserver::EmServer.start(options)
     end
 
-    private
-
-    def send_error(msg = "not supported")
-      send_response(status: 500, content: "500 #{msg}\n")
-    end
-
-    def send_not_found(msg = "Not Found")
-      send_response(status: 404, content: "404 #{msg}\n")
-    end
-
-    def send_response(opts = {})
-      options = {status: 200, content_type: 'text/plain', content: ''}.merge(opts)
-      response = EM::DelegatedHttpResponse.new(self)
-      response.status = options[:status]
-      response.content_type options[:content_type]
-      response.content = options[:content]
-      silence_warnings do
-        response.send_response
-      end
-    end
-
-    def get_uid_from_request
-      if @http_query_string
-        params = CGI.parse(@http_query_string)
-      elsif @http_post_content
-        params = CGI.parse(@http_post_content)
-      end
-      if params && params["address"] && params["address"].any?
-        return params["address"].first
-      else
-        return nil
-      end
-    end
-
-    def send_key(uid)
-      if local_address?(uid)
-        source = Nickserver::CouchDB::Source.new(adapter)
-      else
-        source = Nickserver::Hkp::Source.new(adapter)
-      end
-      source.query(uid) do |response|
-        send_response(status: response.status, content: response.content)
-      end
-    end
-
-    #
-    # Return true if the user address is for a user of this service provider.
-    # e.g. if the provider is example.org, then alice@example.org returns true.
-    #
-    # If 'domain' is not configured, we rely on the Host header of the HTTP request.
-    #
-    def local_address?(uid)
-      uid_domain = uid.sub(/^.*@(.*)$/, "\\1")
-      if Config.domain
-        return uid_domain == Config.domain
-      else
-        # no domain configured, use Host header
-        host_header = @http_headers.split(/\0/).grep(/^Host: /).first
-        if host_header.nil?
-          send_error("HTTP request must include a Host header.")
-        else
-          host = host_header.split(':')[1].strip.sub(/^nicknym\./, '')
-          return uid_domain == host
-        end
-      end
-    rescue # XXX what are we rescueing here?
-      return false
-    end
-
-    def adapter
-      @adapter ||= Nickserver::Adapters::EmHttp.new
-    end
 
   end
 end
diff --git a/lib/nickserver/source.rb b/lib/nickserver/source.rb
new file mode 100644
index 0000000..b8135da
--- /dev/null
+++ b/lib/nickserver/source.rb
@@ -0,0 +1,13 @@
+module Nickserver
+  class Source
+
+    def initialize(adapter)
+      @adapter = adapter
+    end
+
+    protected
+
+    attr_reader :adapter
+
+  end
+end