decoders.rb in em-http-request-0.2.14

- old
+ new
@@ -1,122 +1,122 @@
-require 'zlib'
-require 'stringio'
-
-##
-# Provides a unified callback interface to decompression libraries.
-module EventMachine::HttpDecoders
-
-  class DecoderError < StandardError
-  end
-
-  class << self
-    def accepted_encodings
-      DECODERS.inject([]) { |r,d| r + d.encoding_names }
-    end
-
-    def decoder_for_encoding(encoding)
-      DECODERS.each { |d|
-        return d if d.encoding_names.include? encoding
-      }
-      nil
-    end
-  end
-
-  class Base
-    def self.encoding_names
-      name = to_s.split('::').last.downcase
-      [name]
-    end
-
-    ##
-    # chunk_callback:: [Block] To handle a decompressed chunk
-    def initialize(&chunk_callback)
-      @chunk_callback = chunk_callback
-    end
-
-    def <<(compressed)
-      return unless compressed && compressed.size > 0
-
-      decompressed = decompress(compressed)
-      receive_decompressed decompressed
-    end
-
-    def finalize!
-      decompressed = finalize
-      receive_decompressed decompressed
-    end
-    
-    private
-
-    def receive_decompressed(decompressed)
-      if decompressed && decompressed.size > 0
-        @chunk_callback.call(decompressed)
-      end
-    end
-
-    protected
-
-    ##
-    # Must return a part of decompressed
-    def decompress(compressed)
-      nil
-    end
-
-    ##
-    # May return last part
-    def finalize
-      nil
-    end
-  end
-
-  class Deflate < Base
-    def decompress(compressed)
-      begin
-        @zstream ||= Zlib::Inflate.new(nil)
-        @zstream.inflate(compressed)
-      rescue Zlib::Error
-        raise DecoderError
-      end
-    end
-
-    def finalize
-      return nil unless @zstream
-
-      begin
-        r = @zstream.inflate(nil)
-        @zstream.close
-        r
-      rescue Zlib::Error
-        raise DecoderError
-      end
-    end
-  end
-
-  ##
-  # Oneshot decompressor, due to lack of a streaming Gzip reader
-  # implementation. We may steal code from Zliby to improve this.
-  #
-  # For now, do not put `gzip' or `compressed' in your accept-encoding
-  # header if you expect much data through the :on_response interface.
-  class GZip < Base
-    def self.encoding_names
-      %w(gzip compressed)
-    end
-
-    def decompress(compressed)
-      @buf ||= ''
-      @buf += compressed
-      nil
-    end
-
-    def finalize
-      begin
-        Zlib::GzipReader.new(StringIO.new(@buf.to_s)).read
-      rescue Zlib::Error
-        raise DecoderError
-      end
-    end
-  end
-
-  DECODERS = [Deflate, GZip]
-
-end
+require 'zlib'
+require 'stringio'
+
+##
+# Provides a unified callback interface to decompression libraries.
+module EventMachine::HttpDecoders
+
+  class DecoderError < StandardError
+  end
+
+  class << self
+    def accepted_encodings
+      DECODERS.inject([]) { |r,d| r + d.encoding_names }
+    end
+
+    def decoder_for_encoding(encoding)
+      DECODERS.each { |d|
+        return d if d.encoding_names.include? encoding
+      }
+      nil
+    end
+  end
+
+  class Base
+    def self.encoding_names
+      name = to_s.split('::').last.downcase
+      [name]
+    end
+
+    ##
+    # chunk_callback:: [Block] To handle a decompressed chunk
+    def initialize(&chunk_callback)
+      @chunk_callback = chunk_callback
+    end
+
+    def <<(compressed)
+      return unless compressed && compressed.size > 0
+
+      decompressed = decompress(compressed)
+      receive_decompressed decompressed
+    end
+
+    def finalize!
+      decompressed = finalize
+      receive_decompressed decompressed
+    end
+    
+    private
+
+    def receive_decompressed(decompressed)
+      if decompressed && decompressed.size > 0
+        @chunk_callback.call(decompressed)
+      end
+    end
+
+    protected
+
+    ##
+    # Must return a part of decompressed
+    def decompress(compressed)
+      nil
+    end
+
+    ##
+    # May return last part
+    def finalize
+      nil
+    end
+  end
+
+  class Deflate < Base
+    def decompress(compressed)
+      begin
+        @zstream ||= Zlib::Inflate.new(nil)
+        @zstream.inflate(compressed)
+      rescue Zlib::Error
+        raise DecoderError
+      end
+    end
+
+    def finalize
+      return nil unless @zstream
+
+      begin
+        r = @zstream.inflate(nil)
+        @zstream.close
+        r
+      rescue Zlib::Error
+        raise DecoderError
+      end
+    end
+  end
+
+  ##
+  # Oneshot decompressor, due to lack of a streaming Gzip reader
+  # implementation. We may steal code from Zliby to improve this.
+  #
+  # For now, do not put `gzip' or `compressed' in your accept-encoding
+  # header if you expect much data through the :on_response interface.
+  class GZip < Base
+    def self.encoding_names
+      %w(gzip compressed)
+    end
+
+    def decompress(compressed)
+      @buf ||= ''
+      @buf += compressed
+      nil
+    end
+
+    def finalize
+      begin
+        Zlib::GzipReader.new(StringIO.new(@buf.to_s)).read
+      rescue Zlib::Error
+        raise DecoderError
+      end
+    end
+  end
+
+  DECODERS = [Deflate, GZip]
+
+end