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 AT mehnle.net>
perl v5.26.3 2020-06-03 Mail::SPF::Result(3)
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