Alex Efros > CGI-Easy > CGI::Easy::Headers

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NAME ^

CGI::Easy::Headers - Manage HTTP headers

SYNOPSIS ^

    use CGI::Easy::Headers;

    my $h = CGI::Easy::Headers->new();

    $h->{Expires} = 'Sat, 01 Jan 2000 00:00:00 GMT';
    $h->add_cookie({
        name    => 'somevar',
        value   => 'someval',
        expires => time + 86400,
        domain  => '.example.com',
        path    => '/admin/',
        secure  => 1,
    });
    print $h->compose(), '<html>...</html>';

    $h->redirect('http://google.com/');
    print $h->compose();

    $h->require_basic_auth('Secret Area');
    print $h->compose();

DESCRIPTION ^

Provides user with simple hash where user can easy add/modify/delete HTTP headers while preparing them for sending in CGI reply.

INTERFACE ^

new( [\%headers] )

Create new CGI::Easy::Headers object/hash with these fields:

    'Status'        => '200 OK',
    'Content-Type'  => 'text/html; charset=utf-8',
    'Date'          => q{},
    'Set-Cookie'    => [],

If %headers given, it will be appended to default keys and so may overwrite default values.

See compose() below about special values in 'Date' and 'Set-Cookie' fields.

While you're free to add/modify/delete any fields in this object/hash, HTTP headers is case-insensitive, and thus it's possible to accidentally create different keys in this hash for same HTTP header:

    $h->{'Content-Type'} = 'text/plain';
    $h->{'content-type'} = 'image/png';

To protect against this, compose() allow only keys named in 'Content-Type' way and will throw exception if it found keys named in other way. There few exceptions from this rule: 'ETag', 'WWW-Authenticate' and 'Digest-MD5'.

Return created CGI::Easy::Headers object.

add_cookie( \%cookie, … )

Add new cookies to current HTTP headers. Actually it's just do this:

    push @{ $self->{'Set-Cookie'} }, \%cookie, …;

Possible keys in %cookie:

    name        REQUIRED STRING
    value       OPTIONAL STRING (default "")
    domain      OPTIONAL STRING (default "")
    path        OPTIONAL STRING (default "/")
    expires     OPTIONAL STRING or SECONDS
    secure      OPTIONAL BOOL

Format for "expires" should be either correct date 'Thu, 01-Jan-1970 00:00:00 GMT' or time in seconds.

Return nothing.

redirect( $url [, $status] )

Set HTTP headers 'Location' and 'Status'.

If $status not provided, use '302 Found'.

Return nothing.

require_basic_auth( [$realm] )

Set HTTP headers 'WWW-Authenticate' and 'Status'.

Return nothing.

compose( )

Render all object's fields into single string with all HTTP headers suitable for sending to user's browser.

Most object's field values expected to be simple strings (or ARRAYREF with strings for headers with more than one values) which should be copied to HTTP headers as is:

    $h->{ETag} = '123';
    $h->{'X-My-Header'} = 'my value';
    $h->{'X-Powered-By'} = ['Perl', 'CGI::Easy'];
    $headers = $h->compose();
    # $headers will be:
    #   "ETag: 123\r\n" . 
    #   "X-My-Header: my value\r\n" .
    #   "X-Powered-By: Perl\r\n" .
    #   "X-Powered-By: CGI::Easy\r\n" .
    #   "\r\n"

But there few fields with special handling:

Date

You can set it to usual string (like 'Sat, 01 Jan 2000 00:00:00 GMT') or to unix time in seconds (as returned by time()) - in later case time in seconds will be automatically converted to string with date/time.

If it set to empty string (new() will initially set it this way), then current date/time will be automatically used.

Set-Cookie

This field must be ARRAYREF (new() will initially set it to []), and instead of strings must contain HASHREF with cookie properties (see add_cookie() above).

Return string with HTTP headers ending with empty line. Throw exception on keys named with wrong case (see new() about details).

BUGS AND LIMITATIONS ^

No bugs have been reported.

SUPPORT ^

Please report any bugs or feature requests through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=CGI-Easy. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

You can also look for information at:

AUTHOR ^

Alex Efros <powerman-asdf@ya.ru>

LICENSE AND COPYRIGHT ^

Copyright 2009-2010 Alex Efros <powerman-asdf@ya.ru>.

This program is distributed under the MIT (X11) License: http://www.opensource.org/licenses/mit-license.php

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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