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Edit File : parser.rb \| Size : 20.74 KB
# Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de) # # $Id: parser.rb 47902 2014-10-13 08:53:16Z hsbt $ # require "date" require "xmlrpc/base64" require "xmlrpc/datetime" module NQXML class Node def removeChild(node) @children.delete(node) end def childNodes @children end def hasChildNodes not @children.empty? end def [] (index) @children[index] end def nodeType if @entity.instance_of? NQXML::Text then :TEXT elsif @entity.instance_of? NQXML::Comment then :COMMENT #elsif @entity.instance_of? NQXML::Element then :ELEMENT elsif @entity.instance_of? NQXML::Tag then :ELEMENT else :ELSE end end def nodeValue #TODO: error when wrong Entity-type @entity.text end def nodeName #TODO: error when wrong Entity-type @entity.name end end # class Node end # module NQXML module XMLRPC # :nodoc: # Raised when the remote procedure returns a fault-structure, which has two # accessor-methods +faultCode+ an Integer, and +faultString+ a String. class FaultException < StandardError attr_reader :faultCode, :faultString # Creates a new XMLRPC::FaultException instance. # # +faultString+ is passed to StandardError as the +msg+ of the Exception. def initialize(faultCode, faultString) @faultCode = faultCode @faultString = faultString super(@faultString) end # The +faultCode+ and +faultString+ of the exception in a Hash. def to_h {"faultCode" => @faultCode, "faultString" => @faultString} end end # Helper class used to convert types. module Convert # Converts a String to an Integer # # See also String.to_i def self.int(str) str.to_i end # Converts a String to +true+ or +false+ # # Raises an exception if +str+ is not +0+ or +1+ def self.boolean(str) case str when "0" then false when "1" then true else raise "RPC-value of type boolean is wrong" end end # Converts a String to a Float # # See also String.to_f def self.double(str) str.to_f end # Converts a the given +str+ to a +dateTime.iso8601+ formatted date. # # Raises an exception if the String isn't in +dateTime.iso8601+ format. # # See also, XMLRPC::DateTime def self.dateTime(str) case str when /^(-?\d\d\d\d)-?(\d\d)-?(\d\d)T(\d\d):(\d\d):(\d\d)(?:Z\|([+-])(\d\d):?(\d\d))?$/ a = [$1, $2, $3, $4, $5, $6].collect{\|i\| i.to_i} if $7 ofs = $8.to_i3600 + $9.to_i60 ofs = -ofs if $7=='+' utc = Time.utc(a) + ofs a = [ utc.year, utc.month, utc.day, utc.hour, utc.min, utc.sec ] end XMLRPC::DateTime.new(a) when /^(-?\d\d)-?(\d\d)-?(\d\d)T(\d\d):(\d\d):(\d\d)(Z\|([+-]\d\d):(\d\d))?$/ a = [$1, $2, $3, $4, $5, $6].collect{\|i\| i.to_i} if a[0] < 70 a[0] += 2000 else a[0] += 1900 end if $7 ofs = $8.to_i3600 + $9.to_i60 ofs = -ofs if $7=='+' utc = Time.utc(a) + ofs a = [ utc.year, utc.month, utc.day, utc.hour, utc.min, utc.sec ] end XMLRPC::DateTime.new(a) else raise "wrong dateTime.iso8601 format " + str end end # Decodes the given +str+ using XMLRPC::Base64.decode def self.base64(str) XMLRPC::Base64.decode(str) end # Converts the given +hash+ to a marshalled object. # # Returns the given +hash+ if an exception occurs. def self.struct(hash) # convert to marshalled object klass = hash["___class___"] if klass.nil? or Config::ENABLE_MARSHALLING == false hash else begin mod = Module klass.split("::").each {\|const\| mod = mod.const_get(const.strip)} obj = mod.allocate hash.delete "___class___" hash.each {\|key, value\| obj.instance_variable_set("@#{ key }", value) if key =~ /^([a-zA-Z_]\w)$/ } obj rescue hash end end end # Converts the given +hash+ to an XMLRPC::FaultException object by passing # the +faultCode+ and +faultString+ attributes of the Hash to # XMLRPC::FaultException.new # # Raises an Exception if the given +hash+ doesn't meet the requirements. # Those requirements being: # 2 keys # * <code>'faultCode'</code> key is an Integer # * <code>'faultString'</code> key is a String def self.fault(hash) if hash.kind_of? Hash and hash.size == 2 and hash.has_key? "faultCode" and hash.has_key? "faultString" and hash["faultCode"].kind_of? Integer and hash["faultString"].kind_of? String XMLRPC::FaultException.new(hash["faultCode"], hash["faultString"]) else raise "wrong fault-structure: #{hash.inspect}" end end end # module Convert # Parser for XML-RPC call and response module XMLParser class AbstractTreeParser def parseMethodResponse(str) methodResponse_document(createCleanedTree(str)) end def parseMethodCall(str) methodCall_document(createCleanedTree(str)) end private # Removes all whitespaces but in the tags i4, i8, int, boolean.... # and all comments def removeWhitespacesAndComments(node) remove = [] childs = node.childNodes.to_a childs.each do \|nd\| case _nodeType(nd) when :TEXT # TODO: add nil? unless %w(i4 i8 int boolean string double dateTime.iso8601 base64).include? node.nodeName if node.nodeName == "value" if not node.childNodes.to_a.detect {\|n\| _nodeType(n) == :ELEMENT}.nil? remove << nd if nd.nodeValue.strip == "" end else remove << nd if nd.nodeValue.strip == "" end end when :COMMENT remove << nd else removeWhitespacesAndComments(nd) end end remove.each { \|i\| node.removeChild(i) } end def nodeMustBe(node, name) cmp = case name when Array name.include?(node.nodeName) when String name == node.nodeName else raise "error" end if not cmp then raise "wrong xml-rpc (name)" end node end # Returns, when successfully the only child-node def hasOnlyOneChild(node, name=nil) if node.childNodes.to_a.size != 1 raise "wrong xml-rpc (size)" end if name != nil then nodeMustBe(node.firstChild, name) end end def assert(b) if not b then raise "assert-fail" end end # The node `node` has empty string or string def text_zero_one(node) nodes = node.childNodes.to_a.size if nodes == 1 text(node.firstChild) elsif nodes == 0 "" else raise "wrong xml-rpc (size)" end end def integer(node) #TODO: check string for float because to_i returnsa # 0 when wrong string nodeMustBe(node, %w(i4 i8 int)) hasOnlyOneChild(node) Convert.int(text(node.firstChild)) end def boolean(node) nodeMustBe(node, "boolean") hasOnlyOneChild(node) Convert.boolean(text(node.firstChild)) end def v_nil(node) nodeMustBe(node, "nil") assert( node.childNodes.to_a.size == 0 ) nil end def string(node) nodeMustBe(node, "string") text_zero_one(node) end def double(node) #TODO: check string for float because to_f returnsa # 0.0 when wrong string nodeMustBe(node, "double") hasOnlyOneChild(node) Convert.double(text(node.firstChild)) end def dateTime(node) nodeMustBe(node, "dateTime.iso8601") hasOnlyOneChild(node) Convert.dateTime( text(node.firstChild) ) end def base64(node) nodeMustBe(node, "base64") #hasOnlyOneChild(node) Convert.base64(text_zero_one(node)) end def member(node) nodeMustBe(node, "member") assert( node.childNodes.to_a.size == 2 ) [ name(node[0]), value(node[1]) ] end def name(node) nodeMustBe(node, "name") #hasOnlyOneChild(node) text_zero_one(node) end def array(node) nodeMustBe(node, "array") hasOnlyOneChild(node, "data") data(node.firstChild) end def data(node) nodeMustBe(node, "data") node.childNodes.to_a.collect do \|val\| value(val) end end def param(node) nodeMustBe(node, "param") hasOnlyOneChild(node, "value") value(node.firstChild) end def methodResponse(node) nodeMustBe(node, "methodResponse") hasOnlyOneChild(node, %w(params fault)) child = node.firstChild case child.nodeName when "params" [ true, params(child,false) ] when "fault" [ false, fault(child) ] else raise "unexpected error" end end def methodName(node) nodeMustBe(node, "methodName") hasOnlyOneChild(node) text(node.firstChild) end def params(node, call=true) nodeMustBe(node, "params") if call node.childNodes.to_a.collect do \|n\| param(n) end else # response (only one param) hasOnlyOneChild(node) param(node.firstChild) end end def fault(node) nodeMustBe(node, "fault") hasOnlyOneChild(node, "value") f = value(node.firstChild) Convert.fault(f) end # _nodeType is defined in the subclass def text(node) assert( _nodeType(node) == :TEXT ) assert( node.hasChildNodes == false ) assert( node.nodeValue != nil ) node.nodeValue.to_s end def struct(node) nodeMustBe(node, "struct") hash = {} node.childNodes.to_a.each do \|me\| n, v = member(me) hash[n] = v end Convert.struct(hash) end def value(node) nodeMustBe(node, "value") nodes = node.childNodes.to_a.size if nodes == 0 return "" elsif nodes > 1 raise "wrong xml-rpc (size)" end child = node.firstChild case _nodeType(child) when :TEXT text_zero_one(node) when :ELEMENT case child.nodeName when "i4", "i8", "int" then integer(child) when "boolean" then boolean(child) when "string" then string(child) when "double" then double(child) when "dateTime.iso8601" then dateTime(child) when "base64" then base64(child) when "struct" then struct(child) when "array" then array(child) when "nil" if Config::ENABLE_NIL_PARSER v_nil(child) else raise "wrong/unknown XML-RPC type 'nil'" end else raise "wrong/unknown XML-RPC type" end else raise "wrong type of node" end end def methodCall(node) nodeMustBe(node, "methodCall") assert( (1..2).include?( node.childNodes.to_a.size ) ) name = methodName(node[0]) if node.childNodes.to_a.size == 2 then pa = params(node[1]) else # no parameters given pa = [] end [name, pa] end end # module TreeParserMixin class AbstractStreamParser def parseMethodResponse(str) parser = @parser_class.new parser.parse(str) raise "No valid method response!" if parser.method_name != nil if parser.fault != nil # is a fault structure [false, parser.fault] else # is a normal return value raise "Missing return value!" if parser.params.size == 0 raise "Too many return values. Only one allowed!" if parser.params.size > 1 [true, parser.params[0]] end end def parseMethodCall(str) parser = @parser_class.new parser.parse(str) raise "No valid method call - missing method name!" if parser.method_name.nil? [parser.method_name, parser.params] end end module StreamParserMixin attr_reader :params attr_reader :method_name attr_reader :fault def initialize(a) super(a) @params = [] @values = [] @val_stack = [] @names = [] @name = [] @structs = [] @struct = {} @method_name = nil @fault = nil @data = nil end def startElement(name, attrs=[]) @data = nil case name when "value" @value = nil when "nil" raise "wrong/unknown XML-RPC type 'nil'" unless Config::ENABLE_NIL_PARSER @value = :nil when "array" @val_stack << @values @values = [] when "struct" @names << @name @name = [] @structs << @struct @struct = {} end end def endElement(name) @data \|\|= "" case name when "string" @value = @data when "i4", "i8", "int" @value = Convert.int(@data) when "boolean" @value = Convert.boolean(@data) when "double" @value = Convert.double(@data) when "dateTime.iso8601" @value = Convert.dateTime(@data) when "base64" @value = Convert.base64(@data) when "value" @value = @data if @value.nil? @values << (@value == :nil ? nil : @value) when "array" @value = @values @values = @val_stack.pop when "struct" @value = Convert.struct(@struct) @name = @names.pop @struct = @structs.pop when "name" @name[0] = @data when "member" @struct[@name[0]] = @values.pop when "param" @params << @values[0] @values = [] when "fault" @fault = Convert.fault(@values[0]) when "methodName" @method_name = @data end @data = nil end def character(data) if @data @data << data else @data = data end end end # module StreamParserMixin class XMLStreamParser < AbstractStreamParser def initialize require "xmlparser" @parser_class = Class.new(::XMLParser) { include StreamParserMixin } end end # class XMLStreamParser class NQXMLStreamParser < AbstractStreamParser def initialize require "nqxml/streamingparser" @parser_class = XMLRPCParser end class XMLRPCParser include StreamParserMixin def parse(str) parser = NQXML::StreamingParser.new(str) parser.each do \|ele\| case ele when NQXML::Text @data = ele.text #character(ele.text) when NQXML::Tag if ele.isTagEnd endElement(ele.name) else startElement(ele.name, ele.attrs) end end end # do end # method parse end # class XMLRPCParser end # class NQXMLStreamParser class XMLTreeParser < AbstractTreeParser def initialize require "xmltreebuilder" # The new XMLParser library (0.6.2+) uses a slightly different DOM implementation. # The following code removes the differences between both versions. if defined? XML::DOM::Builder return if defined? XML::DOM::Node::DOCUMENT # code below has been already executed klass = XML::DOM::Node klass.const_set(:DOCUMENT, klass::DOCUMENT_NODE) klass.const_set(:TEXT, klass::TEXT_NODE) klass.const_set(:COMMENT, klass::COMMENT_NODE) klass.const_set(:ELEMENT, klass::ELEMENT_NODE) end end private def _nodeType(node) tp = node.nodeType if tp == XML::SimpleTree::Node::TEXT then :TEXT elsif tp == XML::SimpleTree::Node::COMMENT then :COMMENT elsif tp == XML::SimpleTree::Node::ELEMENT then :ELEMENT else :ELSE end end def methodResponse_document(node) assert( node.nodeType == XML::SimpleTree::Node::DOCUMENT ) hasOnlyOneChild(node, "methodResponse") methodResponse(node.firstChild) end def methodCall_document(node) assert( node.nodeType == XML::SimpleTree::Node::DOCUMENT ) hasOnlyOneChild(node, "methodCall") methodCall(node.firstChild) end def createCleanedTree(str) doc = XML::SimpleTreeBuilder.new.parse(str) doc.documentElement.normalize removeWhitespacesAndComments(doc) doc end end # class XMLParser class NQXMLTreeParser < AbstractTreeParser def initialize require "nqxml/treeparser" end private def _nodeType(node) node.nodeType end def methodResponse_document(node) methodResponse(node) end def methodCall_document(node) methodCall(node) end def createCleanedTree(str) doc = ::NQXML::TreeParser.new(str).document.rootNode removeWhitespacesAndComments(doc) doc end end # class NQXMLTreeParser class REXMLStreamParser < AbstractStreamParser def initialize require "rexml/document" @parser_class = StreamListener end class StreamListener include StreamParserMixin alias :tag_start :startElement alias :tag_end :endElement alias :text :character alias :cdata :character def method_missing(a) # ignore end def parse(str) REXML::Document.parse_stream(str, self) end end end class XMLScanStreamParser < AbstractStreamParser def initialize require "xmlscan/parser" @parser_class = XMLScanParser end class XMLScanParser include StreamParserMixin Entities = { "lt" => "<", "gt" => ">", "amp" => "&", "quot" => '"', "apos" => "'" } def parse(str) parser = XMLScan::XMLParser.new(self) parser.parse(str) end alias :on_stag :startElement alias :on_etag :endElement def on_stag_end(name); end def on_stag_end_empty(name) startElement(name) endElement(name) end def on_chardata(str) character(str) end def on_cdata(str) character(str) end def on_entityref(ent) str = Entities[ent] if str character(str) else raise "unknown entity" end end def on_charref(code) character(code.chr) end def on_charref_hex(code) character(code.chr) end def method_missing(a) end # TODO: call/implement? # valid_name? # valid_chardata? # valid_char? # parse_error end end class LibXMLStreamParser < AbstractStreamParser def initialize require 'libxml' @parser_class = LibXMLStreamListener end class LibXMLStreamListener include StreamParserMixin def on_start_element_ns(name, attributes, prefix, uri, namespaces) startElement(name) end def on_end_element_ns(name, prefix, uri) endElement(name) end alias :on_characters :character alias :on_cdata_block :character def method_missing(*a) end def parse(str) parser = LibXML::XML::SaxParser.string(str) parser.callbacks = self parser.parse() end end end XMLParser = XMLTreeParser NQXMLParser = NQXMLTreeParser Classes = [XMLStreamParser, XMLTreeParser, NQXMLStreamParser, NQXMLTreeParser, REXMLStreamParser, XMLScanStreamParser, LibXMLStreamParser] # yields an instance of each installed parser def self.each_installed_parser XMLRPC::XMLParser::Classes.each do \|klass\| begin yield klass.new rescue LoadError end end end end # module XMLParser end # module XMLRPC Back

Edit File : parser.rb | Size : 20.74 KB

# Copyright (C) 2001, 2002, 2003 by Michael Neumann (mneumann@ntecs.de)
#
# $Id: parser.rb 47902 2014-10-13 08:53:16Z hsbt $
#

require "date"
require "xmlrpc/base64"
require "xmlrpc/datetime"

module NQXML
  class Node

def removeChild(node)
      @children.delete(node)
    end
    def childNodes
      @children
    end
    def hasChildNodes
      not @children.empty?
    end
    def [] (index)
      @children[index]
    end

def nodeType
      if @entity.instance_of? NQXML::Text then :TEXT
      elsif @entity.instance_of? NQXML::Comment then :COMMENT
      #elsif @entity.instance_of? NQXML::Element then :ELEMENT
      elsif @entity.instance_of? NQXML::Tag then :ELEMENT
      else :ELSE
      end
    end

def nodeValue
      #TODO: error when wrong Entity-type
      @entity.text
    end
    def nodeName
      #TODO: error when wrong Entity-type
      @entity.name
    end
  end # class Node
end # module NQXML

module XMLRPC # :nodoc:

# Raised when the remote procedure returns a fault-structure, which has two
  # accessor-methods +faultCode+ an Integer, and +faultString+ a String.
  class FaultException < StandardError
    attr_reader :faultCode, :faultString

# Creates a new XMLRPC::FaultException instance.
    #
    # +faultString+ is passed to StandardError as the +msg+ of the Exception.
    def initialize(faultCode, faultString)
      @faultCode   = faultCode
      @faultString = faultString
      super(@faultString)
    end

# The +faultCode+ and +faultString+ of the exception in a Hash.
    def to_h
      {"faultCode" => @faultCode, "faultString" => @faultString}
    end
  end

# Helper class used to convert types.
  module Convert

# Converts a String to an Integer
    #
    # See also String.to_i
    def self.int(str)
      str.to_i
    end

# Converts a String to +true+ or +false+
    #
    # Raises an exception if +str+ is not +0+ or +1+
    def self.boolean(str)
      case str
      when "0" then false
      when "1" then true
      else
        raise "RPC-value of type boolean is wrong"
      end
    end

# Converts a String to a Float
    #
    # See also String.to_f
    def self.double(str)
      str.to_f
    end

# Converts a the given +str+ to a +dateTime.iso8601+ formatted date.
    #
    # Raises an exception if the String isn't in +dateTime.iso8601+ format.
    #
    # See also, XMLRPC::DateTime
    def self.dateTime(str)
      case str
      when /^(-?\d\d\d\d)-?(\d\d)-?(\d\d)T(\d\d):(\d\d):(\d\d)(?:Z|([+-])(\d\d):?(\d\d))?$/
        a = [$1, $2, $3, $4, $5, $6].collect{|i| i.to_i}
        if $7
          ofs = $8.to_i*3600 + $9.to_i*60
          ofs = -ofs if $7=='+'
          utc = Time.utc(*a) + ofs
          a = [ utc.year, utc.month, utc.day, utc.hour, utc.min, utc.sec ]
        end
        XMLRPC::DateTime.new(*a)
      when /^(-?\d\d)-?(\d\d)-?(\d\d)T(\d\d):(\d\d):(\d\d)(Z|([+-]\d\d):(\d\d))?$/
        a = [$1, $2, $3, $4, $5, $6].collect{|i| i.to_i}
        if a[0] < 70
          a[0] += 2000
        else
          a[0] += 1900
        end
        if $7
          ofs = $8.to_i*3600 + $9.to_i*60
          ofs = -ofs if $7=='+'
          utc = Time.utc(*a) + ofs
          a = [ utc.year, utc.month, utc.day, utc.hour, utc.min, utc.sec ]
        end
        XMLRPC::DateTime.new(*a)
      else
        raise "wrong dateTime.iso8601 format " + str
      end
    end

# Decodes the given +str+ using XMLRPC::Base64.decode
    def self.base64(str)
      XMLRPC::Base64.decode(str)
    end

# Converts the given +hash+ to a marshalled object.
    #
    # Returns the given +hash+ if an exception occurs.
    def self.struct(hash)
      # convert to marshalled object
      klass = hash["___class___"]
      if klass.nil? or Config::ENABLE_MARSHALLING == false
        hash
      else
        begin
          mod = Module
          klass.split("::").each {|const| mod = mod.const_get(const.strip)}

obj = mod.allocate

hash.delete "___class___"
          hash.each {|key, value|
            obj.instance_variable_set("@#{ key }", value) if key =~ /^([a-zA-Z_]\w*)$/
          }
          obj
        rescue
          hash
        end
      end
    end

# Converts the given +hash+ to an XMLRPC::FaultException object by passing
    # the +faultCode+ and +faultString+ attributes of the Hash to
    # XMLRPC::FaultException.new
    #
    # Raises an Exception if the given +hash+ doesn't meet the requirements.
    # Those requirements being:
    # * 2 keys
    # * <code>'faultCode'</code> key is an Integer
    # * <code>'faultString'</code> key is a String
    def self.fault(hash)
      if hash.kind_of? Hash and hash.size == 2 and
        hash.has_key? "faultCode" and hash.has_key? "faultString" and
        hash["faultCode"].kind_of? Integer and hash["faultString"].kind_of? String

XMLRPC::FaultException.new(hash["faultCode"], hash["faultString"])
      else
        raise "wrong fault-structure: #{hash.inspect}"
      end
    end

end # module Convert

# Parser for XML-RPC call and response
  module XMLParser

class AbstractTreeParser

def parseMethodResponse(str)
        methodResponse_document(createCleanedTree(str))
      end

def parseMethodCall(str)
        methodCall_document(createCleanedTree(str))
      end

private

# Removes all whitespaces but in the tags i4, i8, int, boolean....
      # and all comments
      def removeWhitespacesAndComments(node)
        remove = []
        childs = node.childNodes.to_a
        childs.each do |nd|
          case _nodeType(nd)
          when :TEXT
            # TODO: add nil?
            unless %w(i4 i8 int boolean string double dateTime.iso8601 base64).include? node.nodeName

if node.nodeName == "value"
                 if not node.childNodes.to_a.detect {|n| _nodeType(n) == :ELEMENT}.nil?
                   remove << nd if nd.nodeValue.strip == ""
                 end
               else
                 remove << nd if nd.nodeValue.strip == ""
               end
            end
          when :COMMENT
            remove << nd
          else
            removeWhitespacesAndComments(nd)
          end
        end

remove.each { |i| node.removeChild(i) }
      end

def nodeMustBe(node, name)
        cmp = case name
        when Array
          name.include?(node.nodeName)
        when String
          name == node.nodeName
        else
          raise "error"
        end

if not cmp then
          raise "wrong xml-rpc (name)"
        end

node
      end

# Returns, when successfully the only child-node
      def hasOnlyOneChild(node, name=nil)
        if node.childNodes.to_a.size != 1
          raise "wrong xml-rpc (size)"
        end
        if name != nil then
          nodeMustBe(node.firstChild, name)
        end
      end

def assert(b)
        if not b then
          raise "assert-fail"
        end
      end

# The node `node` has empty string or string
      def text_zero_one(node)
        nodes = node.childNodes.to_a.size

if nodes == 1
          text(node.firstChild)
        elsif nodes == 0
          ""
        else
          raise "wrong xml-rpc (size)"
        end
      end

def integer(node)
        #TODO: check string for float because to_i returnsa
        #      0 when wrong string
         nodeMustBe(node, %w(i4 i8 int))
        hasOnlyOneChild(node)

Convert.int(text(node.firstChild))
      end

def boolean(node)
        nodeMustBe(node, "boolean")
        hasOnlyOneChild(node)

Convert.boolean(text(node.firstChild))
      end

def v_nil(node)
        nodeMustBe(node, "nil")
        assert( node.childNodes.to_a.size == 0 )
        nil
      end

def string(node)
        nodeMustBe(node, "string")
        text_zero_one(node)
      end

def double(node)
        #TODO: check string for float because to_f returnsa
        #      0.0 when wrong string
        nodeMustBe(node, "double")
        hasOnlyOneChild(node)

Convert.double(text(node.firstChild))
      end

def dateTime(node)
        nodeMustBe(node, "dateTime.iso8601")
        hasOnlyOneChild(node)

Convert.dateTime( text(node.firstChild) )
      end

def base64(node)
        nodeMustBe(node, "base64")
        #hasOnlyOneChild(node)

Convert.base64(text_zero_one(node))
      end

def member(node)
        nodeMustBe(node, "member")
        assert( node.childNodes.to_a.size == 2 )

[ name(node[0]), value(node[1]) ]
      end

def name(node)
        nodeMustBe(node, "name")
        #hasOnlyOneChild(node)
        text_zero_one(node)
      end

def array(node)
        nodeMustBe(node, "array")
        hasOnlyOneChild(node, "data")
        data(node.firstChild)
      end

def data(node)
        nodeMustBe(node, "data")

node.childNodes.to_a.collect do |val|
          value(val)
        end
      end

def param(node)
        nodeMustBe(node, "param")
        hasOnlyOneChild(node, "value")
        value(node.firstChild)
      end

def methodResponse(node)
        nodeMustBe(node, "methodResponse")
        hasOnlyOneChild(node, %w(params fault))
        child = node.firstChild

case child.nodeName
        when "params"
          [ true, params(child,false) ]
        when "fault"
          [ false, fault(child) ]
        else
          raise "unexpected error"
        end

end

def methodName(node)
        nodeMustBe(node, "methodName")
        hasOnlyOneChild(node)
        text(node.firstChild)
      end

def params(node, call=true)
        nodeMustBe(node, "params")

if call
          node.childNodes.to_a.collect do |n|
            param(n)
          end
        else # response (only one param)
          hasOnlyOneChild(node)
          param(node.firstChild)
        end
      end

def fault(node)
        nodeMustBe(node, "fault")
        hasOnlyOneChild(node, "value")
        f = value(node.firstChild)
        Convert.fault(f)
      end

# _nodeType is defined in the subclass
      def text(node)
        assert( _nodeType(node) == :TEXT )
        assert( node.hasChildNodes == false )
        assert( node.nodeValue != nil )

node.nodeValue.to_s
      end

def struct(node)
        nodeMustBe(node, "struct")

hash = {}
        node.childNodes.to_a.each do |me|
          n, v = member(me)
          hash[n] = v
        end

Convert.struct(hash)
      end

def value(node)
        nodeMustBe(node, "value")
        nodes = node.childNodes.to_a.size
        if nodes == 0
          return ""
        elsif nodes > 1
          raise "wrong xml-rpc (size)"
        end

child = node.firstChild

case _nodeType(child)
        when :TEXT
          text_zero_one(node)
        when :ELEMENT
          case child.nodeName
          when "i4", "i8", "int"  then integer(child)
          when "boolean"          then boolean(child)
          when "string"           then string(child)
          when "double"           then double(child)
          when "dateTime.iso8601" then dateTime(child)
          when "base64"           then base64(child)
          when "struct"           then struct(child)
          when "array"            then array(child)
          when "nil"
            if Config::ENABLE_NIL_PARSER
              v_nil(child)
            else
              raise "wrong/unknown XML-RPC type 'nil'"
            end
          else
            raise "wrong/unknown XML-RPC type"
          end
        else
          raise "wrong type of node"
        end

end

def methodCall(node)
        nodeMustBe(node, "methodCall")
        assert( (1..2).include?( node.childNodes.to_a.size ) )
        name = methodName(node[0])

if node.childNodes.to_a.size == 2 then
          pa = params(node[1])
        else # no parameters given
          pa = []
        end
        [name, pa]
      end

end # module TreeParserMixin

class AbstractStreamParser
      def parseMethodResponse(str)
        parser = @parser_class.new
        parser.parse(str)
        raise "No valid method response!" if parser.method_name != nil
        if parser.fault != nil
          # is a fault structure
          [false, parser.fault]
        else
          # is a normal return value
          raise "Missing return value!" if parser.params.size == 0
          raise "Too many return values. Only one allowed!" if parser.params.size > 1
          [true, parser.params[0]]
        end
      end

def parseMethodCall(str)
        parser = @parser_class.new
        parser.parse(str)
        raise "No valid method call - missing method name!" if parser.method_name.nil?
        [parser.method_name, parser.params]
      end
    end

module StreamParserMixin
      attr_reader :params
      attr_reader :method_name
      attr_reader :fault

def initialize(*a)
        super(*a)
        @params = []
        @values = []
        @val_stack = []

@names = []
        @name = []

@structs = []
        @struct = {}

@method_name = nil
        @fault = nil

@data = nil
      end

def startElement(name, attrs=[])
        @data = nil
        case name
        when "value"
          @value = nil
        when "nil"
          raise "wrong/unknown XML-RPC type 'nil'" unless Config::ENABLE_NIL_PARSER
          @value = :nil
        when "array"
          @val_stack << @values
          @values = []
        when "struct"
          @names << @name
          @name = []

@structs << @struct
          @struct = {}
        end
      end

def endElement(name)
        @data ||= ""
        case name
        when "string"
          @value = @data
        when "i4", "i8", "int"
          @value = Convert.int(@data)
        when "boolean"
          @value = Convert.boolean(@data)
        when "double"
          @value = Convert.double(@data)
        when "dateTime.iso8601"
          @value = Convert.dateTime(@data)
        when "base64"
          @value = Convert.base64(@data)
        when "value"
          @value = @data if @value.nil?
          @values << (@value == :nil ? nil : @value)
        when "array"
          @value = @values
          @values = @val_stack.pop
        when "struct"
          @value = Convert.struct(@struct)

@name = @names.pop
          @struct = @structs.pop
        when "name"
          @name[0] = @data
        when "member"
          @struct[@name[0]] = @values.pop

when "param"
          @params << @values[0]
          @values = []

when "fault"
          @fault = Convert.fault(@values[0])

when "methodName"
          @method_name = @data
        end

@data = nil
      end

def character(data)
        if @data
          @data << data
        else
          @data = data
        end
      end

end # module StreamParserMixin

class XMLStreamParser < AbstractStreamParser
      def initialize
        require "xmlparser"
        @parser_class = Class.new(::XMLParser) {
          include StreamParserMixin
        }
      end
    end # class XMLStreamParser

class NQXMLStreamParser < AbstractStreamParser
      def initialize
        require "nqxml/streamingparser"
        @parser_class = XMLRPCParser
      end

class XMLRPCParser
        include StreamParserMixin

def parse(str)
          parser = NQXML::StreamingParser.new(str)
          parser.each do |ele|
            case ele
            when NQXML::Text
              @data = ele.text
              #character(ele.text)
            when NQXML::Tag
              if ele.isTagEnd
                endElement(ele.name)
              else
                startElement(ele.name, ele.attrs)
              end
            end
          end # do
        end # method parse
      end # class XMLRPCParser

end # class NQXMLStreamParser

class XMLTreeParser < AbstractTreeParser

def initialize
        require "xmltreebuilder"

# The new XMLParser library (0.6.2+) uses a slightly different DOM implementation.
        # The following code removes the differences between both versions.
        if defined? XML::DOM::Builder
          return if defined? XML::DOM::Node::DOCUMENT # code below has been already executed
          klass = XML::DOM::Node
          klass.const_set(:DOCUMENT, klass::DOCUMENT_NODE)
          klass.const_set(:TEXT, klass::TEXT_NODE)
          klass.const_set(:COMMENT, klass::COMMENT_NODE)
          klass.const_set(:ELEMENT, klass::ELEMENT_NODE)
        end
      end

private

def _nodeType(node)
        tp = node.nodeType
        if tp == XML::SimpleTree::Node::TEXT then :TEXT
        elsif tp == XML::SimpleTree::Node::COMMENT then :COMMENT
        elsif tp == XML::SimpleTree::Node::ELEMENT then :ELEMENT
        else :ELSE
        end
      end

def methodResponse_document(node)
        assert( node.nodeType == XML::SimpleTree::Node::DOCUMENT )
        hasOnlyOneChild(node, "methodResponse")

methodResponse(node.firstChild)
      end

def methodCall_document(node)
        assert( node.nodeType == XML::SimpleTree::Node::DOCUMENT )
        hasOnlyOneChild(node, "methodCall")

methodCall(node.firstChild)
      end

def createCleanedTree(str)
        doc = XML::SimpleTreeBuilder.new.parse(str)
        doc.documentElement.normalize
        removeWhitespacesAndComments(doc)
        doc
      end

end # class XMLParser

class NQXMLTreeParser < AbstractTreeParser

def initialize
        require "nqxml/treeparser"
      end

private

def _nodeType(node)
        node.nodeType
      end

def methodResponse_document(node)
        methodResponse(node)
      end

def methodCall_document(node)
        methodCall(node)
      end

def createCleanedTree(str)
        doc = ::NQXML::TreeParser.new(str).document.rootNode
        removeWhitespacesAndComments(doc)
        doc
      end

end # class NQXMLTreeParser

class REXMLStreamParser < AbstractStreamParser
      def initialize
        require "rexml/document"
        @parser_class = StreamListener
      end

class StreamListener
        include StreamParserMixin

alias :tag_start :startElement
        alias :tag_end :endElement
        alias :text :character
        alias :cdata :character

def method_missing(*a)
          # ignore
        end

def parse(str)
          REXML::Document.parse_stream(str, self)
        end
      end

end

class XMLScanStreamParser < AbstractStreamParser
      def initialize
        require "xmlscan/parser"
        @parser_class = XMLScanParser
      end

class XMLScanParser
        include StreamParserMixin

Entities = {
          "lt"   => "<",
          "gt"   => ">",
          "amp"  => "&",
          "quot" => '"',
          "apos" => "'"
        }

def parse(str)
          parser  = XMLScan::XMLParser.new(self)
          parser.parse(str)
        end

alias :on_stag :startElement
        alias :on_etag :endElement

def on_stag_end(name); end

def on_stag_end_empty(name)
          startElement(name)
          endElement(name)
        end

def on_chardata(str)
          character(str)
        end

def on_cdata(str)
          character(str)
        end

def on_entityref(ent)
          str = Entities[ent]
          if str
            character(str)
          else
            raise "unknown entity"
          end
        end

def on_charref(code)
          character(code.chr)
        end

def on_charref_hex(code)
          character(code.chr)
        end

def method_missing(*a)
        end

# TODO: call/implement?
        # valid_name?
        # valid_chardata?
        # valid_char?
        # parse_error

end
    end

class LibXMLStreamParser < AbstractStreamParser
      def initialize
        require 'libxml'
        @parser_class = LibXMLStreamListener
      end

class LibXMLStreamListener
        include StreamParserMixin

def on_start_element_ns(name, attributes, prefix, uri, namespaces)
          startElement(name)
        end

def on_end_element_ns(name, prefix, uri)
          endElement(name)
        end

alias :on_characters :character
        alias :on_cdata_block :character

def method_missing(*a)
        end

def parse(str)
          parser = LibXML::XML::SaxParser.string(str)
          parser.callbacks = self
          parser.parse()
        end
      end
    end

XMLParser   = XMLTreeParser
    NQXMLParser = NQXMLTreeParser

Classes = [XMLStreamParser, XMLTreeParser,
               NQXMLStreamParser, NQXMLTreeParser,
               REXMLStreamParser, XMLScanStreamParser,
               LibXMLStreamParser]

# yields an instance of each installed parser
    def self.each_installed_parser
      XMLRPC::XMLParser::Classes.each do |klass|
        begin
          yield klass.new
        rescue LoadError
        end
      end
    end

end # module XMLParser

end # module XMLRPC

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