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# SOAP4R - SOAP XML Instance Parser library.
# Copyright (C) 2001, 2003 NAKAMURA, Hiroshi <nahi@ruby-lang.org>.
# This program is copyrighted free software by NAKAMURA, Hiroshi. You can
# redistribute it and/or modify it under the same terms of Ruby's license;
# either the dual license version in 2003, or any later version.
require 'xsd/ns'
require 'xsd/xmlparser'
require 'soap/soap'
require 'soap/baseData'
require 'soap/encodingstyle/handler'
module SOAP
class Parser
include SOAP
class ParseError < Error; end
class FormatDecodeError < ParseError; end
class UnexpectedElementError < ParseError; end
private
class ParseFrame
attr_reader :node
attr_reader :name
attr_reader :ns, :encodingstyle
class NodeContainer
def initialize(node)
@node = node
end
def node
@node
end
def replace_node(node)
@node = node
end
end
public
def initialize(ns, name, node, encodingstyle)
@ns = ns
@name = name
self.node = node
@encodingstyle = encodingstyle
end
def node=(node)
@node = NodeContainer.new(node)
end
end
public
attr_accessor :envelopenamespace
attr_accessor :default_encodingstyle
attr_accessor :decode_typemap
attr_accessor :allow_unqualified_element
def initialize(opt = {})
@opt = opt
@parser = XSD::XMLParser.create_parser(self, opt)
@parsestack = nil
@lastnode = nil
@handlers = {}
@envelopenamespace = opt[:envelopenamespace] || EnvelopeNamespace
@default_encodingstyle = opt[:default_encodingstyle] || EncodingNamespace
@decode_typemap = opt[:decode_typemap] || nil
@allow_unqualified_element = opt[:allow_unqualified_element] || false
end
def charset
@parser.charset
end
def parse(string_or_readable)
@parsestack = []
@lastnode = nil
@handlers.each do |uri, handler|
handler.decode_prologue
end
@parser.do_parse(string_or_readable)
unless @parsestack.empty?
raise FormatDecodeError.new("Unbalanced tag in XML.")
end
@handlers.each do |uri, handler|
handler.decode_epilogue
end
@lastnode
end
def start_element(name, attrs)
lastframe = @parsestack.last
ns = parent = parent_encodingstyle = nil
if lastframe
ns = lastframe.ns.clone_ns
parent = lastframe.node
parent_encodingstyle = lastframe.encodingstyle
else
ns = XSD::NS.new
parent = ParseFrame::NodeContainer.new(nil)
parent_encodingstyle = nil
end
attrs = XSD::XMLParser.filter_ns(ns, attrs)
encodingstyle = find_encodingstyle(ns, attrs)
# Children's encodingstyle is derived from its parent.
if encodingstyle.nil?
if parent.node.is_a?(SOAPHeader)
encodingstyle = LiteralNamespace
else
encodingstyle = parent_encodingstyle || @default_encodingstyle
end
end
node = decode_tag(ns, name, attrs, parent, encodingstyle)
@parsestack << ParseFrame.new(ns, name, node, encodingstyle)
end
def characters(text)
lastframe = @parsestack.last
if lastframe
# Need not to be cloned because character does not have attr.
decode_text(lastframe.ns, text, lastframe.encodingstyle)
else
# Ignore Text outside of SOAP Envelope.
p text if $DEBUG
end
end
def end_element(name)
lastframe = @parsestack.pop
unless name == lastframe.name
raise UnexpectedElementError.new("Closing element name '#{ name }' does not match with opening element '#{ lastframe.name }'.")
end
decode_tag_end(lastframe.ns, lastframe.node, lastframe.encodingstyle)
@lastnode = lastframe.node.node
end
private
def find_encodingstyle(ns, attrs)
attrs.each do |key, value|
if (ns.compare(@envelopenamespace, AttrEncodingStyle, key))
return value
end
end
nil
end
def decode_tag(ns, name, attrs, parent, encodingstyle)
ele = ns.parse(name)
# Envelope based parsing.
if ((ele.namespace == @envelopenamespace) ||
(@allow_unqualified_element && ele.namespace.nil?))
o = decode_soap_envelope(ns, ele, attrs, parent)
return o if o
end
# Encoding based parsing.
handler = find_handler(encodingstyle)
if handler
return handler.decode_tag(ns, ele, attrs, parent)
else
raise FormatDecodeError.new("Unknown encodingStyle: #{ encodingstyle }.")
end
end
def decode_tag_end(ns, node, encodingstyle)
return unless encodingstyle
handler = find_handler(encodingstyle)
if handler
return handler.decode_tag_end(ns, node)
else
raise FormatDecodeError.new("Unknown encodingStyle: #{ encodingstyle }.")
end
end
def decode_text(ns, text, encodingstyle)
handler = find_handler(encodingstyle)
if handler
handler.decode_text(ns, text)
else
# How should I do?
end
end
def decode_soap_envelope(ns, ele, attrs, parent)
o = nil
if ele.name == EleEnvelope
o = SOAPEnvelope.new
if ext = @opt[:external_content]
ext.each do |k, v|
o.external_content[k] = v
end
end
elsif ele.name == EleHeader
unless parent.node.is_a?(SOAPEnvelope)
raise FormatDecodeError.new("Header should be a child of Envelope.")
end
o = SOAPHeader.new
parent.node.header = o
elsif ele.name == EleBody
unless parent.node.is_a?(SOAPEnvelope)
raise FormatDecodeError.new("Body should be a child of Envelope.")
end
o = SOAPBody.new
parent.node.body = o
elsif ele.name == EleFault
unless parent.node.is_a?(SOAPBody)
raise FormatDecodeError.new("Fault should be a child of Body.")
end
o = SOAPFault.new
parent.node.fault = o
end
o
end
def find_handler(encodingstyle)
unless @handlers.key?(encodingstyle)
handler_factory = SOAP::EncodingStyle::Handler.handler(encodingstyle) ||
SOAP::EncodingStyle::Handler.handler(EncodingNamespace)
handler = handler_factory.new(@parser.charset)
handler.decode_typemap = @decode_typemap
handler.decode_prologue
@handlers[encodingstyle] = handler
end
@handlers[encodingstyle]
end
end
end