X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/e1213a4651e72beb660dddcf467d353744e3f336..0a92041c4d30567ffc68c4bcbbdb1b5e4efa6180:/lib/potlatch.rb?ds=inline

diff --git a/lib/potlatch.rb b/lib/potlatch.rb
index ef3be79a8..f7661e39d 100644
--- a/lib/potlatch.rb
+++ b/lib/potlatch.rb
@@ -1,128 +1,167 @@
+require "stringio"
+
 # The Potlatch module provides helper functions for potlatch and its communication with the server
 module Potlatch
-
   # The AMF class is a set of helper functions for encoding and decoding AMF.
   class AMF
-    
     # Return two-byte integer
-    def self.getint(s) 
-      s.getc*256+s.getc
+    def self.getint(s)
+      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
+    def self.getlong(s)
+      ((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)
+    # Return string with two-byte length
+    def self.getstring(s)
+      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 
-    def self.getdouble(s) 
-      a=s.read(8).unpack('G')			# G big-endian, E little-endian
+    # Return eight-byte double-precision float
+    def self.getdouble(s)
+      a = s.read(8).unpack("G")	# G big-endian, E little-endian
       a[0]
     end
 
     # Return numeric array
-    def self.getarray(s) 
-      len=getlong(s)
-      arr=[]
-      for i in (0..len-1)
-        arr[i]=getvalue(s)
-      end
-      arr
+    def self.getarray(s)
+      Array.new(getlong(s)) { getvalue(s) }
     end
 
-    # Return object/hash 
-    def self.getobject(s) 
-      arr={}
-      while (key=getstring(s))
-        if (key=='') then break end
-        arr[key]=getvalue(s)
+    # Return object/hash
+    def self.getobject(s)
+      arr = {}
+      while (key = getstring(s))
+        break if key == ""
+        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
-      when 0;	return getdouble(s)			# number
-      when 1;	return s.getc				# 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
+    def self.getvalue(s)
+      case s.getbyte
+      when 0 then return getdouble(s)                  # number
+      when 1 then return s.getbyte                     # boolean
+      when 2 then return getstring(s)                  # string
+      when 3 then return getobject(s)                  # object/hash
+      when 5 then return nil                           # null
+      when 6 then return nil                           # undefined
+      when 8 then s.read(4)                            # mixedArray
+                  return getobject(s)                  #  |
+      when 10 then return getarray(s)                  # array
+      else         return nil                          # error
       end
     end
 
     # Envelope data into AMF writeable form
-    def self.putdata(index,n) 
-      d =encodestring(index+"/onResult")
-      d+=encodestring("null")
-      d+=[-1].pack("N")
-      d+=encodevalue(n)
+    def self.putdata(index, n)
+      d = encodestring(index + "/onResult")
+      d += encodestring("null")
+      d += [-1].pack("N")
+      d += encodevalue(n)
+      d
     end
 
     # Pack variables as AMF
-    def self.encodevalue(n) 
+    def self.encodevalue(n)
       case n.class.to_s
-      when 'Array'
-        a=10.chr+encodelong(n.length)
+      when "Array"
+        a = 10.chr + encodelong(n.length)
         n.each do |b|
-          a+=encodevalue(b)
+          a += encodevalue(b)
         end
         a
-      when 'Hash'
-        a=3.chr
-        n.each do |k,v|
-          a+=encodestring(k.to_s)+encodevalue(v)
+      when "Hash"
+        a = 3.chr
+        n.each do |k, v|
+          a += encodestring(k.to_s) + encodevalue(v)
         end
-        a+0.chr+0.chr+9.chr
-      when 'String'
-        2.chr+encodestring(n)
-      when 'Bignum','Fixnum','Float'
-        0.chr+encodedouble(n)
-      when 'NilClass'
+        a + 0.chr + 0.chr + 9.chr
+      when "String"
+        2.chr + encodestring(n)
+      when "Bignum", "Fixnum", "Float"
+        0.chr + encodedouble(n)
+      when "NilClass"
         5.chr
-	  when 'TrueClass'
-        0.chr+encodedouble(1)
-	  when 'FalseClass'
-        0.chr+encodedouble(0)
+      when "TrueClass"
+        0.chr + encodedouble(1)
+      when "FalseClass"
+        0.chr + encodedouble(0)
       else
-        Rails.logger.error("Unexpected Ruby type for AMF conversion: "+n.class.to_s)
+        Rails.logger.error("Unexpected Ruby type for AMF conversion: " + n.class.to_s)
       end
     end
 
     # Encode string with two-byte length
-    def self.encodestring(n) 
-      a,b=n.size.divmod(256)
-      a.chr+b.chr+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
 
-    # Encode number as eight-byte double precision float 
-    def self.encodedouble(n) 
-      [n].pack('G')
+    # Encode number as eight-byte double precision float
+    def self.encodedouble(n)
+      [n].pack("G")
     end
 
     # Encode number as four-byte long
-    def self.encodelong(n) 
-      [n].pack('N')
+    def self.encodelong(n)
+      [n].pack("N")
     end
-
   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
+        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
-
     # ----- getpresets
     #		  in:   none
     #		  does: reads tag preset menus, colours, and autocomplete config files
@@ -133,86 +172,92 @@ module Potlatch
       Rails.logger.info("  Message: getpresets")
 
       # Read preset menus
-      presets={}
-      presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]; presetmenus['POI']=[]
-      presetnames={}; presetnames['point']={}; presetnames['way']={}; presetnames['POI']={}
-      presettype=''
-      presetcategory=''
+      presets = {}
+      presetmenus = { "point" => [], "way" => [], "POI" => [] }
+      presetnames = { "point" => {}, "way" => {}, "POI" => {} }
+      presettype = ""
+      presetcategory = ""
       #	StringIO.open(txt) do |file|
       File.open("#{Rails.root}/config/potlatch/presets.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/(\w+)\/(\w+)/) then
-            presettype=$1
-            presetcategory=$2
+        file.each_line do |line|
+          t = line.chomp
+          if t =~ %r{(\w+)/(\w+)}
+            presettype = $1
+            presetcategory = $2
             presetmenus[presettype].push(presetcategory)
-            presetnames[presettype][presetcategory]=["(no preset)"]
-          elsif (t=~/^([\w\s]+):\s?(.+)$/) then
-            pre=$1; kv=$2
+            presetnames[presettype][presetcategory] = ["(no preset)"]
+          elsif t =~ /^([\w\s]+):\s?(.+)$/
+            pre = $1
+            kv = $2
             presetnames[presettype][presetcategory].push(pre)
-            presets[pre]={}
-            kv.split(',').each {|a|
-              if (a=~/^(.+)=(.*)$/) then presets[pre][$1]=$2 end
-            }
+            presets[pre] = {}
+            kv.split(",").each do |a|
+              presets[pre][$1] = $2 if a =~ /^(.+)=(.*)$/
+            end
           end
-        }
+        end
       end
 
       # Read colours/styling
-      colours={}; casing={}; areas={}
+      colours = {}
+      casing = {}
+      areas = {}
       File.open("#{Rails.root}/config/potlatch/colours.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/(\w+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)/) then
-            tag=$1
-            if ($2!='-') then colours[tag]=$2.hex end
-            if ($3!='-') then casing[tag]=$3.hex end
-            if ($4!='-') then areas[tag]=$4.hex end
-          end
-        }
+        file.each_line do |line|
+          next unless line.chomp =~ /(\w+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)/
+
+          tag = $1
+          colours[tag] = $2.hex if $2 != "-"
+          casing[tag] = $3.hex if $3 != "-"
+          areas[tag] = $4.hex if $4 != "-"
+        end
       end
 
       # Read relations colours/styling
-      relcolours={}; relalphas={}; relwidths={}
+      relcolours = {}
+      relalphas = {}
+      relwidths = {}
       File.open("#{Rails.root}/config/potlatch/relation_colours.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/(\w+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)/) then
-            tag=$1
-            if ($2!='-') then relcolours[tag]=$2.hex end
-            if ($3!='-') then relalphas[tag]=$3.to_i end
-            if ($4!='-') then relwidths[tag]=$4.to_i end
-          end
-        }
+        file.each_line do |line|
+          next unless line.chomp =~ /(\w+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)/
+
+          tag = $1
+          relcolours[tag] = $2.hex if $2 != "-"
+          relalphas[tag] = $3.to_i if $3 != "-"
+          relwidths[tag] = $4.to_i if $4 != "-"
+        end
       end
 
       # Read POI presets
-      icon_list=[]; icon_tags={};
+      icon_list = []
+      icon_tags = {}
       File.open("#{Rails.root}/config/potlatch/icon_presets.txt") do |file|
-        file.each_line {|line|
-          (icon,tags)=line.chomp.split("\t")
+        file.each_line do |line|
+          (icon, tags) = line.chomp.split("\t")
           icon_list.push(icon)
-          icon_tags[icon]=Hash[*tags.scan(/([^;=]+)=([^;=]+)/).flatten]
-        }
+          icon_tags[icon] = Hash[*tags.scan(/([^;=]+)=([^;=]+)/).flatten]
+        end
       end
       icon_list.reverse!
-      
+
       # Read auto-complete
-      autotags={}; autotags['point']={}; autotags['way']={}; autotags['POI']={};
+      autotags = { "point" => {}, "way" => {}, "POI" => {} }
       File.open("#{Rails.root}/config/potlatch/autocomplete.txt") do |file|
-        file.each_line {|line|
-          t=line.chomp
-          if (t=~/^([\w:]+)\/(\w+)\s+(.+)$/) then
-            tag=$1; type=$2; values=$3
-            if values=='-' then autotags[type][tag]=[]
-            else autotags[type][tag]=values.split(',').sort.reverse end
-          end
-        }
+        file.each_line do |line|
+          next unless line.chomp =~ %r{^([\w:]+)/(\w+)\s+(.+)$}
+
+          tag = $1
+          type = $2
+          values = $3
+          autotags[type][tag] = if values == "-"
+                                  []
+                                else
+                                  values.split(",").sort.reverse
+                                end
+        end
       end
 
-      [presets,presetmenus,presetnames,colours,casing,areas,autotags,relcolours,relalphas,relwidths,icon_list,{},icon_tags]
+      [presets, presetmenus, presetnames, colours, casing, areas, autotags, relcolours, relalphas, relwidths, icon_list, {}, icon_tags]
     end
   end
-
 end
-