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[rails.git] / lib / potlatch.rb

diff --git a/lib/potlatch.rb b/lib/potlatch.rb
index ef3be79a80f748ebff407c6aeaf29f1e6d5ab41a..359492fa7f19d573d1e03b96d435977d6ebe9007 100644 (file)
--- a/lib/potlatch.rb
+++ b/lib/potlatch.rb
@@ -1,3 +1,5 @@
+require 'stringio'
+
 # The Potlatch module provides helper functions for potlatch and its communication with the server
 module Potlatch
 
@@ -6,18 +8,20 @@ module Potlatch
     
     # Return two-byte integer
     def self.getint(s) 
-      s.getc*256+s.getc
+      s.getbyte*256+s.getbyte
     end
 
     # Return four-byte long
     def self.getlong(s) 
-      ((s.getc*256+s.getc)*256+s.getc)*256+s.getc
+      ((s.getbyte*256+s.getbyte)*256+s.getbyte)*256+s.getbyte
     end
 
     # Return string with two-byte length 
     def self.getstring(s) 
-      len=s.getc*256+s.getc
-      s.read(len)
+      len=s.getbyte*256+s.getbyte
+      str=s.read(len)
+      str.force_encoding("UTF-8") if str.respond_to?("force_encoding")
+      str
     end
 
     # Return eight-byte double-precision float 
@@ -43,23 +47,23 @@ module Potlatch
         if (key=='') then break end
         arr[key]=getvalue(s)
       end
-      s.getc           # skip the 9 'end of object' value
+      s.getbyte                # skip the 9 'end of object' value
       arr
     end
 
     # Parse and get value
     def self.getvalue(s) 
-      case s.getc
+      case s.getbyte
       when 0;  return getdouble(s)                     # number
-      when 1;  return s.getc                           # boolean
+      when 1;  return s.getbyte                        # boolean
       when 2;  return getstring(s)                     # string
       when 3;  return getobject(s)                     # object/hash
-      when 5;  return nil                                      # null
-      when 6;  return nil                                      # undefined
-      when 8;  s.read(4)                                       # mixedArray
-        return getobject(s)                    #  |
-      when 10;return getarray(s)                       # array
-      else;    return nil                                      # error
+      when 5;  return nil                              # null
+      when 6;  return nil                              # undefined
+      when 8;  s.read(4)                               # mixedArray
+                return getobject(s)                    #  |
+      when 10;  return getarray(s)                     # array
+      else;    return nil                              # error
       end
     end
 
@@ -102,7 +106,8 @@ module Potlatch
     end
 
     # Encode string with two-byte length
-    def self.encodestring(n) 
+    def self.encodestring(n)
+      n=n.dup.force_encoding("ASCII-8BIT") if n.respond_to?("force_encoding")
       a,b=n.size.divmod(256)
       a.chr+b.chr+n
     end
@@ -119,6 +124,48 @@ module Potlatch
 
   end
 
+  # The Dispatcher class handles decoding a series of RPC calls
+  # from the request, dispatching them, and encoding the response
+  class Dispatcher
+    def initialize(request, &block)
+      # Get stream for request data
+      @request = StringIO.new(request + 0.chr)
+
+      # Skip version indicator and client ID
+      @request.read(2)
+
+      # Skip headers
+      AMF.getint(@request).times do     # Read number of headers and loop
+        AMF.getstring(@request)         #  | skip name
+        req.getbyte                     #  | skip boolean
+        AMF.getvalue(@request)          #  | skip value
+      end
+
+      # Capture the dispatch routine
+      @dispatch = Proc.new
+    end
+
+    def each(&block)
+      # Read number of message bodies
+      bodies = AMF.getint(@request)
+
+      # Output response header
+      a,b = bodies.divmod(256)
+      yield 0.chr + 0.chr + 0.chr + 0.chr + a.chr + b.chr
+
+      # Process the bodies
+      bodies.times do                     # Read each body
+        name = AMF.getstring(@request)    #  | get message name
+        index = AMF.getstring(@request)   #  | get index in response sequence
+        bytes = AMF.getlong(@request)     #  | get total size in bytes
+        args = AMF.getvalue(@request)     #  | get response (probably an array)
+
+        result = @dispatch.call(name, *args)
+
+        yield AMF.putdata(index, result)
+      end
+    end
+  end
 
   # The Potlatch class is a helper for Potlatch
   class Potlatch