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Mail::SPF::Result(3)	       User Contributed Perl Documentation	     Mail::SPF::Result(3)

NAME
       Mail::SPF::Result - SPF result class

SYNOPSIS
       For the general usage of Mail::SPF::Result objects in code that calls Mail::SPF, see
       Mail::SPF.  For the detailed interface of Mail::SPF::Result and its derivatives, see
       below.

   Throwing results
	   package Mail::SPF::Foo;
	   use Error ':try';
	   use Mail::SPF::Result;

	   sub foo {
	       if (...) {
		   $server->throw_result('pass', $request)
	       }
	       else {
		   $server->throw_result('permerror', $request, 'Invalid foo');
	       }
	   }

   Catching results
	   package Mail::SPF::Bar;
	   use Error ':try';
	   use Mail::SPF::Foo;

	   try {
	       Mail::SPF::Foo->foo();
	   }
	   catch Mail::SPF::Result with {
	       my ($result) = @_;
	       ...
	   };

   Using results
	   my $result_name     = $result->name;
	   my $result_code     = $result->code;
	   my $request	       = $result->request;
	   my $local_exp       = $result->local_explanation;
	   my $authority_exp   = $result->authority_explanation
	       if $result->can('authority_explanation');
	   my $spf_header      = $result->received_spf_header;

DESCRIPTION
       An object of class Mail::SPF::Result represents the result of an SPF request.

       There is usually no need to construct an SPF result object directly using the "new"
       constructor.  Instead, use the "throw" class method to signal to the calling code that a
       definite SPF result has been determined.  In other words, use Mail::SPF::Result and its
       derivatives just like exceptions.  See Error or "eval" in perlfunc for how to handle
       exceptions in Perl.

   Constructor
       The following constructor is provided:

       new($server, $request): returns Mail::SPF::Result
       new($server, $request, $text): returns Mail::SPF::Result
	   Creates a new SPF result object and associates the given Mail::SPF::Server and
	   Mail::SPF::Request objects with it.	An optional result text may be specified.

   Class methods
       The following class methods are provided:

       throw($server, $request): throws Mail::SPF::Result
       throw($server, $request, $text): throws Mail::SPF::Result
	   Throws a new SPF result object, associating the given Mail::SPF::Server and
	   Mail::SPF::Request objects with it.	An optional result text may be specified.

	   Note:  Do not write code invoking "throw" on literal result class names as this would
	   ignore any derivative result classes provided by Mail::SPF extension modules.  Invoke
	   the "throw_result" method on a Mail::SPF::Server object instead.

       name: returns string
	   Abstract.  Returns the result name of the result class (or object).	For classes of
	   the Mail::SPF::Result::* hierarchy, this roughly corresponds to the trailing part of
	   the class name.  For example, returns "neutral-by-default" if invoked on
	   Mail::SPF::Result::NeutralByDefault.  Also see the "code" method.  This method may
	   also be used as an instance method.

	   This method must be implemented by sub-classes of Mail::SPF::Result for which the
	   result name differs from the result code.

       class: returns class
       class($name): returns class
	   Maps the given result name to the corresponding Mail::SPF::Result::* class, or returns
	   the result base class (the class on which it is invoked) if no result name is given.
	   If an unknown result name is specified, returns undef.

       isa_by_name($name): returns boolean
	   If the class (or object) on which this method is invoked represents the given result
	   name (or a derivative name), returns true.  Returns false otherwise.  This method may
	   also be used as an instance method.

	   For example, "Mail::SPF::Result::NeutralByDefault->isa_by_name('neutral')" returns
	   true.

       code: returns string
	   Abstract.  Returns the basic SPF result code ("pass", "fail", "softfail", "neutral",
	   "none", "error", "permerror", "temperror") of the result class on which it is invoked.
	   All valid result codes are valid result names as well, the reverse however does not
	   apply.  This method may also be used as an instance method.

	   This method is abstract and must be implemented by sub-classes of Mail::SPF::Result.

       is_code($code): returns boolean
	   If the class (or object) on which this method is invoked represents the given result
	   code, returns true.	Returns false otherwise.  This method may also be used as an
	   instance method.

	   Note:  The "isa_by_name" method provides a superset of this method's functionality.

       received_spf_header_name: returns string
	   Returns 'Received-SPF' as the field name for "Received-SPF" header fields.  This
	   method should be overridden by Mail::SPF extension modules that provide non-standard
	   features (such as local policy) with the capacity to dilute the purity of SPF results,
	   in order not to deceive users of the header field into mistaking it as an indication
	   of a natural SPF result.

   Instance methods
       The following instance methods are provided:

       throw: throws Mail::SPF::Result
       throw($server, $request): throws Mail::SPF::Result
       throw($server, $request, $text): throws Mail::SPF::Result
	   Re-throws an existing SPF result object.  If Mail::SPF::Server and Mail::SPF::Request
	   objects are specified, associates them with the result object, replacing the prior
	   server and request objects.	If a result text is specified as well, overrides the
	   prior result text.

       server: returns Mail::SPF::Server
	   Returns the Mail::SPF server object that produced the result at hand.

       request: returns Mail::SPF::Request
	   Returns the SPF request that led to the result at hand.

       text: returns string
	   Returns the text message of the result object.

       stringify: returns string
	   Returns the result's name and text message formatted as a string.  You can simply use
	   a Mail::SPF::Result object as a string for the same effect, see "OVERLOADING".

       local_explanation: returns string; throws Mail::SPF::EDNSError,
       Mail::SPF::EInvalidMacroString
	   Returns a locally generated explanation for the result.

	   The local explanation is prefixed with the authority domain whose sender policy is
	   responsible for the result.	If the responsible sender policy referred to another
	   domain's policy (using the "include" mechanism or the "redirect" modifier), that other
	   domain which is directly responsible for the result is also included in the local
	   explanation's head.	For example:

	       example.com: <local-explanation>

	   The authority domain "example.com"'s sender policy is directly responsible for the
	   result.

	       example.com ... other.example.org: <local-explanation>

	   The authority domain "example.com" (directly or indirectly) referred to the domain
	   "other.example.org", whose sender policy then led to the result.

       received_spf_header: returns string
	   Returns a string containing an appropriate "Received-SPF" header field for the result
	   object.  The header field is not line-wrapped and contains no trailing newline
	   character.

OVERLOADING
       If a Mail::SPF::Result object is used as a string, the "stringify" method is used to
       convert the object into a string.

RESULT CLASSES
       The following result classes are provided:

       o   Mail::SPF::Result::Pass

       o   Mail::SPF::Result::Fail

       o   Mail::SPF::Result::SoftFail

       o   Mail::SPF::Result::Neutral

	   o   Mail::SPF::Result::NeutralByDefault

	       This is a special case of the "neutral" result that is thrown as a default when
	       "falling off" the end of the record during evaluation.  See RFC 4408, 4.7.

       o   Mail::SPF::Result::None

       o   Mail::SPF::Result::Error

	   o   Mail::SPF::Result::PermError

	   o   Mail::SPF::Result::TempError

       The following result classes have additional functionality:

       Mail::SPF::Result::Fail
	   The following additional instance method is provided:

	   authority_explanation: returns string; throws Mail::SPF::EDNSError,
	   Mail::SPF::EInvalidMacroString
	       Returns the authority domain's explanation for the result.  Be aware that the
	       authority domain may be a malicious party and thus the authority explanation
	       should not be trusted blindly.  See RFC 4408, 10.5, for a detailed discussion of
	       this issue.

SEE ALSO
       Mail::SPF, Mail::SPF::Server, Error, "eval" in perlfunc

       <http://tools.ietf.org/html/rfc4408>

       For availability, support, and license information, see the README file included with
       Mail::SPF.

AUTHORS
       Julian Mehnle <julian@mehnle.net>

perl v5.16.3				    2014-06-10			     Mail::SPF::Result(3)
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