=head1 NAME

APR::Request::Param - wrapper for libapreq2's param API.

=begin testing
    use APR::Pool;
    use APR::Brigade;
    use APR::Bucket;
    use APR::BucketAlloc;
    use APR::Request;
    use APR::Request::Parser;
    $pool = APR::Pool->new;
    $ba = APR::BucketAlloc->new($pool);
    $bb = APR::Brigade->new($pool, $ba);
    $content = <<EOT;
Content-Disposition: form-data; name="alpha"
Content-Type: text/plain; charset=us-ascii

Content-Disposition: form-data; name="beta" filename="foo.txt"
Content-Type: text/plain; charset=us-ascii

Content-Disposition: form-data; name="gamma"
Content-Type: text/plain; charset=us-ascii

    s/(?<!\015)\012/\015\012/g for $content;
    $bb->insert_tail(APR::Bucket->new($ba, $content));
    $parser = APR::Request::Parser->multipart($pool, $ba,
                                    "multipart/form-data; boundary=-XYZ-");
    $req = APR::Request::Custom->handle($pool, "alpha=arg1&beta=arg2",
                                                $parser, 1e6, $bb);

=end testing


=for example begin

  use APR::Request::Param;

  $arg1 = $req->args('alpha');
  $body = $req->body;
  ok $_->isa("APR::Request::Param") for values %$body;

  @uploads = grep {$_->upload} values %$body;
  $param = $body->get('beta');
  $param->upload_slurp(my $content);

=for example end

=for example_testing
  is $arg1, "arg1", 'alpha arg is "arg1"';
  ok @uploads == 1;
  is $content, "second", 'contents of upload_slurp'; 


The C<< APR::Request::Param >> module provides base methods
for interfacing with libapreq2's param API.  It also provides
a few utility functions and constants.

This manpage documents version 2.16
of the APR::Request::Param, APR::Request::Brigade,
and APR::Request::Brigade::IO packages.



=head2 ""


The double-quote interpolation operator maps to
C<< APR::Request::Param::value() >>.

=for example begin

=for example end

=for example_testing
    is "$param", $param->value, "quotes";

=head1 METHODS


=head2 name


Returns the param's name.
This attribute cannot be modified.

=for example begin

=for example end

=for example_testing
    is $param->name, "beta", "name";

=head2 value


Returns the param's value.
This attribute cannot be modified.

=for example begin

=for example end

=for example_testing
    is $param->value, "foo.txt", "value";

=head2 is_tainted


Get/set the param's internal tainted flag.
Note: if the param's charset is APREQ_CHARSET_UTF8 (8),
this also activates the SvUTF8_on flag during calls
to name() and/or value().

=for example begin

    $tainted = $param->is_tainted;
    ok $param->is_tainted == 0;

=for example end

=for example_testing
    is $param->is_tainted, $tainted, "tainted";

=head2 charset


Get/set the param's internal charset.  The charset
is a number between 0 and 255; the current recognized
values are

=over 4

=item 0 APREQ_CHARSET_ASCII    (7-bit us-ascii)

=item 1 APREQ_CHARSET_LATIN1   (8-bit iso-8859-1)

=item 2 APREQ_CHARSET_CP1252   (8-bit Windows-1252)

=item 8 APREQ_CHARSET_UTF8     (utf8 encoded Unicode)


See L<is_tainted> above for info about how APREQ_CHARSET_UTF8
relates to perl's UTF-8 flag.

=for example begin

    $charset = $param->charset;
    ok $param->charset == 2;

=for example end

=for example_testing
    is $param->charset, $charset, "charset";

=head2 make

    APR::Request::Param->make($pool, $name, $value)

Fast XS param constructor.

=head2 info


Get/set the APR::Table headers for this param.

=head2 upload


Get/set the APR::Brigade file-upload content for this param.

=head2 upload_filename


Returns the client-side filename associated with this param.

=head2 upload_link


Links the file-upload content with the local file named C<< $path >>.
Creates a hard-link if the spoolfile's (see L<upload_tempname>)
temporary directory is on the same device as C<< $path >>;
otherwise this writes a copy.

=head2 upload_slurp


Reads the entire file-upload content into C<< $data >>.

=head2 upload_size


Returns the size of the param's file-upload content.

=head2 upload_type


Returns the MIME-type of the param's file-upload content.

=head2 upload_tempname


Returns the name of the local spoolfile for this param.

=head2 upload_io


Returns an L<APR::Request::Brigade::IO> object, which can
be treated as a non-seekable IO stream.

=head2 upload_fh


Returns a seekable filehandle representing the file-upload content.

=head1 METHODS


This class is derived from APR::Brigade, providing additional
methods for TIEHANDLE, READ and READLINE.  To be memory efficient,
these methods delete buckets from the brigade as soon as their
data is actually read, so you cannot C<seek> on handles tied to
this class.  Such handles have semantics similar to that of a
read-only socket.

=head2 new, TIEHANDLE


Creates a copy of the bucket brigade represented by $bb, and
blesses that copy into the APR::Request::Brigade class.  This
provides syntactic sugar for using perl's builtin C<read>, C<readline>,
and C<< <> >> operations on handles tied to this package:

=for example begin

    use Symbol;
    $fh = gensym;
    tie *$fh, "APR::Request::Brigade", $bb;
    print while <$fh>;

=for example end

=head2 READ

    $bb->READ($contents, $length)
    $bb->READ($contents, $length, $offset)

Reads data from the brigade $bb into $contents.  When omitted
$length defaults to C<-1>, which reads the first bucket into $contents.
A positive $length will read in $length bytes, or the remainder of the
brigade, whichever is greater. $offset represents the index in $context
to read the new data.



Returns the first line of data from the bride. Lines are terminated by
linefeeds (the '\012' character), but we may eventually use C<$/> instead.

=head1 METHODS


=head2 read

OO interface to APR::Request::Brigade::READ.

=head2 readline

OO interface to APR::Request::Brigade::READLINE.

=head1 SEE ALSO

L<APR::Request>, L<APR::Table>, L<APR::Brigade>.


  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
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  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at


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  distributed under the License is distributed on an "AS IS" BASIS,
  See the License for the specific language governing permissions and
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