зеркало из https://github.com/github/ruby.git
709 строки
20 KiB
Ruby
709 строки
20 KiB
Ruby
# frozen_string_literal: false
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# xmlrpc/server.rb
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# Copyright (C) 2001, 2002, 2003, 2005 by Michael Neumann (mneumann@ntecs.de)
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#
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# Released under the same term of license as Ruby.
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require "xmlrpc/parser"
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require "xmlrpc/create"
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require "xmlrpc/config"
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require "xmlrpc/utils" # ParserWriterChooseMixin
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module XMLRPC # :nodoc:
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# This is the base class for all XML-RPC server-types (CGI, standalone).
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# You can add handler and set a default handler.
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# Do not use this server, as this is/should be an abstract class.
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#
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# === How the method to call is found
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# The arity (number of accepted arguments) of a handler (method or Proc
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# object) is compared to the given arguments submitted by the client for a
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# RPC, or Remote Procedure Call.
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#
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# A handler is only called if it accepts the number of arguments, otherwise
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# the search for another handler will go on. When at the end no handler was
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# found, the default_handler, XMLRPC::BasicServer#set_default_handler will be
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# called.
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#
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# With this technique it is possible to do overloading by number of parameters, but
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# only for Proc handler, because you cannot define two methods of the same name in
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# the same class.
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class BasicServer
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include ParserWriterChooseMixin
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include ParseContentType
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ERR_METHOD_MISSING = 1
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ERR_UNCAUGHT_EXCEPTION = 2
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ERR_MC_WRONG_PARAM = 3
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ERR_MC_MISSING_PARAMS = 4
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ERR_MC_MISSING_METHNAME = 5
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ERR_MC_RECURSIVE_CALL = 6
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ERR_MC_WRONG_PARAM_PARAMS = 7
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ERR_MC_EXPECTED_STRUCT = 8
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# Creates a new XMLRPC::BasicServer instance, which should not be
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# done, because XMLRPC::BasicServer is an abstract class. This
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# method should be called from a subclass indirectly by a +super+ call
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# in the initialize method.
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#
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# The parameter +class_delim+ is used by add_handler, see
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# XMLRPC::BasicServer#add_handler, when an object is added as a handler, to
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# delimit the object-prefix and the method-name.
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def initialize(class_delim=".")
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@handler = []
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@default_handler = nil
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@service_hook = nil
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@class_delim = class_delim
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@create = nil
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@parser = nil
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add_multicall if Config::ENABLE_MULTICALL
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add_introspection if Config::ENABLE_INTROSPECTION
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end
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# Adds +aBlock+ to the list of handlers, with +name+ as the name of
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# the method.
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#
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# Parameters +signature+ and +help+ are used by the Introspection method if
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# specified, where +signature+ is either an Array containing strings each
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# representing a type of it's signature (the first is the return value) or
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# an Array of Arrays if the method has multiple signatures.
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#
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# Value type-names are "int, boolean, double, string, dateTime.iso8601,
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# base64, array, struct".
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#
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# Parameter +help+ is a String with information about how to call this method etc.
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#
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# When a method fails, it can tell the client by throwing an
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# XMLRPC::FaultException like in this example:
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#
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# s.add_handler("michael.div") do |a,b|
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# if b == 0
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# raise XMLRPC::FaultException.new(1, "division by zero")
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# else
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# a / b
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# end
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# end
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#
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# In the case of <code>b==0</code> the client gets an object back of type
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# XMLRPC::FaultException that has a +faultCode+ and +faultString+ field.
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#
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# This is the second form of ((<add_handler|XMLRPC::BasicServer#add_handler>)).
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# To add an object write:
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#
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# server.add_handler("michael", MyHandlerClass.new)
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#
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# All public methods of MyHandlerClass are accessible to
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# the XML-RPC clients by <code>michael."name of method"</code>. This is
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# where the +class_delim+ in XMLRPC::BasicServer.new plays it's role, a
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# XML-RPC method-name is defined by +prefix+ + +class_delim+ + <code>"name
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# of method"</code>.
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#
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# The third form of +add_handler is to use XMLRPC::Service::Interface to
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# generate an object, which represents an interface (with signature and
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# help text) for a handler class.
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#
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# The +interface+ parameter must be an instance of XMLRPC::Service::Interface.
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# Adds all methods of +obj+ which are defined in the +interface+ to the server.
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#
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# This is the recommended way of adding services to a server!
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def add_handler(prefix, obj_or_signature=nil, help=nil, &block)
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if block_given?
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# proc-handler
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@handler << [prefix, block, obj_or_signature, help]
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else
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if prefix.kind_of? String
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# class-handler
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raise ArgumentError, "Expected non-nil value" if obj_or_signature.nil?
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@handler << [prefix + @class_delim, obj_or_signature]
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elsif prefix.kind_of? XMLRPC::Service::BasicInterface
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# class-handler with interface
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# add all methods
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@handler += prefix.get_methods(obj_or_signature, @class_delim)
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else
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raise ArgumentError, "Wrong type for parameter 'prefix'"
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end
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end
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self
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end
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# Returns the service-hook, which is called on each service request (RPC)
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# unless it's +nil+.
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def get_service_hook
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@service_hook
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end
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# A service-hook is called for each service request (RPC).
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#
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# You can use a service-hook for example to wrap existing methods and catch
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# exceptions of them or convert values to values recognized by XMLRPC.
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#
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# You can disable it by passing +nil+ as the +handler+ parameter.
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#
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# The service-hook is called with a Proc object along with any parameters.
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#
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# An example:
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#
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# server.set_service_hook {|obj, *args|
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# begin
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# ret = obj.call(*args) # call the original service-method
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# # could convert the return value
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# rescue
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# # rescue exceptions
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# end
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# }
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#
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def set_service_hook(&handler)
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@service_hook = handler
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self
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end
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# Returns the default-handler, which is called when no handler for
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# a method-name is found.
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#
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# It is either a Proc object or +nil+.
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def get_default_handler
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@default_handler
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end
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# Sets +handler+ as the default-handler, which is called when
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# no handler for a method-name is found.
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#
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# +handler+ is a code-block.
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#
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# The default-handler is called with the (XML-RPC) method-name as first
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# argument, and the other arguments are the parameters given by the
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# client-call.
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#
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# If no block is specified the default of XMLRPC::BasicServer is
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# used, which raises a XMLRPC::FaultException saying "method missing".
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def set_default_handler(&handler)
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@default_handler = handler
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self
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end
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# Adds the multi-call handler <code>"system.multicall"</code>.
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def add_multicall
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add_handler("system.multicall", %w(array array), "Multicall Extension") do |arrStructs|
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unless arrStructs.is_a? Array
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raise XMLRPC::FaultException.new(ERR_MC_WRONG_PARAM, "system.multicall expects an array")
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end
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arrStructs.collect {|call|
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if call.is_a? Hash
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methodName = call["methodName"]
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params = call["params"]
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if params.nil?
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multicall_fault(ERR_MC_MISSING_PARAMS, "Missing params")
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elsif methodName.nil?
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multicall_fault(ERR_MC_MISSING_METHNAME, "Missing methodName")
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else
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if methodName == "system.multicall"
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multicall_fault(ERR_MC_RECURSIVE_CALL, "Recursive system.multicall forbidden")
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else
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unless params.is_a? Array
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multicall_fault(ERR_MC_WRONG_PARAM_PARAMS, "Parameter params have to be an Array")
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else
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ok, val = call_method(methodName, *params)
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if ok
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# correct return value
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[val]
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else
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# exception
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multicall_fault(val.faultCode, val.faultString)
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end
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end
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end
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end
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else
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multicall_fault(ERR_MC_EXPECTED_STRUCT, "system.multicall expected struct")
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end
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}
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end # end add_handler
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self
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end
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# Adds the introspection handlers <code>"system.listMethods"</code>,
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# <code>"system.methodSignature"</code> and
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# <code>"system.methodHelp"</code>, where only the first one works.
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def add_introspection
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add_handler("system.listMethods",%w(array), "List methods available on this XML-RPC server") do
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methods = []
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@handler.each do |name, obj|
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if obj.kind_of? Proc
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methods << name
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else
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obj.class.public_instance_methods(false).each do |meth|
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methods << "#{name}#{meth}"
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end
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end
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end
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methods
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end
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add_handler("system.methodSignature", %w(array string), "Returns method signature") do |meth|
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sigs = []
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@handler.each do |name, obj, sig|
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if obj.kind_of? Proc and sig != nil and name == meth
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if sig[0].kind_of? Array
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# sig contains multiple signatures, e.g. [["array"], ["array", "string"]]
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sig.each {|s| sigs << s}
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else
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# sig is a single signature, e.g. ["array"]
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sigs << sig
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end
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end
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end
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sigs.uniq! || sigs # remove eventually duplicated signatures
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end
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add_handler("system.methodHelp", %w(string string), "Returns help on using this method") do |meth|
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help = nil
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@handler.each do |name, obj, sig, hlp|
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if obj.kind_of? Proc and name == meth
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help = hlp
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break
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end
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end
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help || ""
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end
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self
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end
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def process(data)
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method, params = parser().parseMethodCall(data)
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handle(method, *params)
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end
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private
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def multicall_fault(nr, str)
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{"faultCode" => nr, "faultString" => str}
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end
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def dispatch(methodname, *args)
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for name, obj in @handler
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if obj.kind_of? Proc
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next unless methodname == name
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else
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next unless methodname =~ /^#{name}(.+)$/
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next unless obj.respond_to? $1
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obj = obj.method($1)
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end
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if check_arity(obj, args.size)
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if @service_hook.nil?
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return obj.call(*args)
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else
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return @service_hook.call(obj, *args)
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end
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end
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end
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if @default_handler.nil?
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raise XMLRPC::FaultException.new(ERR_METHOD_MISSING, "Method #{methodname} missing or wrong number of parameters!")
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else
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@default_handler.call(methodname, *args)
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end
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end
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# Returns +true+, if the arity of +obj+ matches +n_args+
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def check_arity(obj, n_args)
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ary = obj.arity
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if ary >= 0
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n_args == ary
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else
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n_args >= (ary+1).abs
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end
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end
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def call_method(methodname, *args)
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begin
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[true, dispatch(methodname, *args)]
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rescue XMLRPC::FaultException => e
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[false, e]
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rescue Exception => e
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[false, XMLRPC::FaultException.new(ERR_UNCAUGHT_EXCEPTION, "Uncaught exception #{e.message} in method #{methodname}")]
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end
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end
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def handle(methodname, *args)
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create().methodResponse(*call_method(methodname, *args))
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end
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end
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# Implements a CGI-based XML-RPC server.
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#
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# require "xmlrpc/server"
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#
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# s = XMLRPC::CGIServer.new
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#
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# s.add_handler("michael.add") do |a,b|
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# a + b
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# end
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#
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# s.add_handler("michael.div") do |a,b|
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# if b == 0
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# raise XMLRPC::FaultException.new(1, "division by zero")
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# else
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# a / b
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# end
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# end
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#
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# s.set_default_handler do |name, *args|
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# raise XMLRPC::FaultException.new(-99, "Method #{name} missing" +
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# " or wrong number of parameters!")
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# end
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#
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# s.serve
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#
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#
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# <b>Note:</b> Make sure that you don't write to standard-output in a
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# handler, or in any other part of your program, this would cause a CGI-based
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# server to fail!
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class CGIServer < BasicServer
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@@obj = nil
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# Creates a new XMLRPC::CGIServer instance.
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#
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# All parameters given are by-passed to XMLRPC::BasicServer.new.
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#
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# You can only create <b>one</b> XMLRPC::CGIServer instance, because more
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# than one makes no sense.
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def CGIServer.new(*a)
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@@obj = super(*a) if @@obj.nil?
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@@obj
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end
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def initialize(*a)
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super(*a)
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end
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# Call this after you have added all you handlers to the server.
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#
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# This method processes a XML-RPC method call and sends the answer
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# back to the client.
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def serve
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catch(:exit_serve) {
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length = ENV['CONTENT_LENGTH'].to_i
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http_error(405, "Method Not Allowed") unless ENV['REQUEST_METHOD'] == "POST"
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http_error(400, "Bad Request") unless parse_content_type(ENV['CONTENT_TYPE']).first == "text/xml"
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http_error(411, "Length Required") unless length > 0
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# TODO: do we need a call to binmode?
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$stdin.binmode if $stdin.respond_to? :binmode
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data = $stdin.read(length)
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http_error(400, "Bad Request") if data.nil? or data.bytesize != length
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http_write(process(data), "Content-type" => "text/xml; charset=utf-8")
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}
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end
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private
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def http_error(status, message)
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err = "#{status} #{message}"
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msg = <<-"MSGEND"
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<html>
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<head>
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<title>#{err}</title>
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</head>
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<body>
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<h1>#{err}</h1>
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<p>Unexpected error occurred while processing XML-RPC request!</p>
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</body>
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</html>
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MSGEND
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http_write(msg, "Status" => err, "Content-type" => "text/html")
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throw :exit_serve # exit from the #serve method
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end
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def http_write(body, header)
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h = {}
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header.each {|key, value| h[key.to_s.capitalize] = value}
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h['Status'] ||= "200 OK"
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h['Content-length'] ||= body.bytesize.to_s
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str = ""
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h.each {|key, value| str << "#{key}: #{value}\r\n"}
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str << "\r\n#{body}"
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print str
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end
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end
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# Implements a XML-RPC server, which works with Apache mod_ruby.
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#
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# Use it in the same way as XMLRPC::CGIServer!
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class ModRubyServer < BasicServer
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# Creates a new XMLRPC::ModRubyServer instance.
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#
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# All parameters given are by-passed to XMLRPC::BasicServer.new.
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def initialize(*a)
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@ap = Apache::request
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super(*a)
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end
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# Call this after you have added all you handlers to the server.
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#
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# This method processes a XML-RPC method call and sends the answer
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# back to the client.
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def serve
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catch(:exit_serve) {
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header = {}
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@ap.headers_in.each {|key, value| header[key.capitalize] = value}
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length = header['Content-length'].to_i
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http_error(405, "Method Not Allowed") unless @ap.request_method == "POST"
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http_error(400, "Bad Request") unless parse_content_type(header['Content-type']).first == "text/xml"
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http_error(411, "Length Required") unless length > 0
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# TODO: do we need a call to binmode?
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@ap.binmode
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data = @ap.read(length)
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http_error(400, "Bad Request") if data.nil? or data.bytesize != length
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http_write(process(data), 200, "Content-type" => "text/xml; charset=utf-8")
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}
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end
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private
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def http_error(status, message)
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err = "#{status} #{message}"
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msg = <<-"MSGEND"
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<html>
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<head>
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<title>#{err}</title>
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</head>
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<body>
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<h1>#{err}</h1>
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<p>Unexpected error occurred while processing XML-RPC request!</p>
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</body>
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</html>
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MSGEND
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http_write(msg, status, "Status" => err, "Content-type" => "text/html")
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throw :exit_serve # exit from the #serve method
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end
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def http_write(body, status, header)
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h = {}
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header.each {|key, value| h[key.to_s.capitalize] = value}
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h['Status'] ||= "200 OK"
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h['Content-length'] ||= body.bytesize.to_s
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h.each {|key, value| @ap.headers_out[key] = value }
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@ap.content_type = h["Content-type"]
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@ap.status = status.to_i
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@ap.send_http_header
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@ap.print body
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end
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end
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class WEBrickServlet < BasicServer; end # forward declaration
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# Implements a standalone XML-RPC server. The method XMLRPC::Server#serve is
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# left if a SIGHUP is sent to the program.
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#
|
|
# require "xmlrpc/server"
|
|
#
|
|
# s = XMLRPC::Server.new(8080)
|
|
#
|
|
# s.add_handler("michael.add") do |a,b|
|
|
# a + b
|
|
# end
|
|
#
|
|
# s.add_handler("michael.div") do |a,b|
|
|
# if b == 0
|
|
# raise XMLRPC::FaultException.new(1, "division by zero")
|
|
# else
|
|
# a / b
|
|
# end
|
|
# end
|
|
#
|
|
# s.set_default_handler do |name, *args|
|
|
# raise XMLRPC::FaultException.new(-99, "Method #{name} missing" +
|
|
# " or wrong number of parameters!")
|
|
# end
|
|
#
|
|
# s.serve
|
|
class Server < WEBrickServlet
|
|
|
|
# Creates a new XMLRPC::Server instance, which is a XML-RPC server
|
|
# listening on the given +port+ and accepts requests for the given +host+,
|
|
# which is +localhost+ by default.
|
|
#
|
|
# The server is not started, to start it you have to call
|
|
# XMLRPC::Server#serve.
|
|
#
|
|
# The optional +audit+ and +debug+ parameters are obsolete!
|
|
#
|
|
# All additionally provided parameters in <code>*a</code> are by-passed to
|
|
# XMLRPC::BasicServer.new.
|
|
def initialize(port=8080, host="127.0.0.1", maxConnections=4, stdlog=$stdout, audit=true, debug=true, *a)
|
|
super(*a)
|
|
require 'webrick'
|
|
@server = WEBrick::HTTPServer.new(:Port => port, :BindAddress => host, :MaxClients => maxConnections,
|
|
:Logger => WEBrick::Log.new(stdlog))
|
|
@server.mount("/", self)
|
|
end
|
|
|
|
# Call this after you have added all you handlers to the server.
|
|
# This method starts the server to listen for XML-RPC requests and answer them.
|
|
def serve
|
|
signals = %w[INT TERM HUP] & Signal.list.keys
|
|
signals.each { |signal| trap(signal) { @server.shutdown } }
|
|
|
|
@server.start
|
|
end
|
|
|
|
# Stops and shuts the server down.
|
|
def shutdown
|
|
@server.shutdown
|
|
end
|
|
|
|
end
|
|
|
|
|
|
# Implements a servlet for use with WEBrick, a pure Ruby (HTTP) server
|
|
# framework.
|
|
#
|
|
# require "webrick"
|
|
# require "xmlrpc/server"
|
|
#
|
|
# s = XMLRPC::WEBrickServlet.new
|
|
# s.add_handler("michael.add") do |a,b|
|
|
# a + b
|
|
# end
|
|
#
|
|
# s.add_handler("michael.div") do |a,b|
|
|
# if b == 0
|
|
# raise XMLRPC::FaultException.new(1, "division by zero")
|
|
# else
|
|
# a / b
|
|
# end
|
|
# end
|
|
#
|
|
# s.set_default_handler do |name, *args|
|
|
# raise XMLRPC::FaultException.new(-99, "Method #{name} missing" +
|
|
# " or wrong number of parameters!")
|
|
# end
|
|
#
|
|
# httpserver = WEBrick::HTTPServer.new(:Port => 8080)
|
|
# httpserver.mount("/RPC2", s)
|
|
# trap("HUP") { httpserver.shutdown } # use 1 instead of "HUP" on Windows
|
|
# httpserver.start
|
|
class WEBrickServlet < BasicServer
|
|
def initialize(*a)
|
|
super
|
|
require "webrick/httpstatus"
|
|
@valid_ip = nil
|
|
end
|
|
|
|
# Deprecated from WEBrick/1.2.2, but does not break anything.
|
|
def require_path_info?
|
|
false
|
|
end
|
|
|
|
def get_instance(config, *options)
|
|
# TODO: set config & options
|
|
self
|
|
end
|
|
|
|
# Specifies the valid IP addresses that are allowed to connect to the server.
|
|
#
|
|
# Each IP is either a String or a Regexp.
|
|
def set_valid_ip(*ip_addr)
|
|
if ip_addr.size == 1 and ip_addr[0].nil?
|
|
@valid_ip = nil
|
|
else
|
|
@valid_ip = ip_addr
|
|
end
|
|
end
|
|
|
|
# Return the valid IP addresses that are allowed to connect to the server.
|
|
#
|
|
# See also, XMLRPC::Server#set_valid_ip
|
|
def get_valid_ip
|
|
@valid_ip
|
|
end
|
|
|
|
def service(request, response)
|
|
|
|
if @valid_ip
|
|
raise WEBrick::HTTPStatus::Forbidden unless @valid_ip.any? { |ip| request.peeraddr[3] =~ ip }
|
|
end
|
|
|
|
if request.request_method != "POST"
|
|
raise WEBrick::HTTPStatus::MethodNotAllowed,
|
|
"unsupported method `#{request.request_method}'."
|
|
end
|
|
|
|
if parse_content_type(request['Content-type']).first != "text/xml"
|
|
raise WEBrick::HTTPStatus::BadRequest
|
|
end
|
|
|
|
length = (request['Content-length'] || 0).to_i
|
|
|
|
raise WEBrick::HTTPStatus::LengthRequired unless length > 0
|
|
|
|
data = request.body
|
|
|
|
if data.nil? or data.bytesize != length
|
|
raise WEBrick::HTTPStatus::BadRequest
|
|
end
|
|
|
|
resp = process(data)
|
|
if resp.nil? or resp.bytesize <= 0
|
|
raise WEBrick::HTTPStatus::InternalServerError
|
|
end
|
|
|
|
response.status = 200
|
|
response['Content-Length'] = resp.bytesize
|
|
response['Content-Type'] = "text/xml; charset=utf-8"
|
|
response.body = resp
|
|
end
|
|
end
|
|
|
|
|
|
end # module XMLRPC
|
|
|
|
|
|
=begin
|
|
= History
|
|
$Id$
|
|
=end
|
|
|