Mojo::Headers(3) HTTP headers

SYNOPSIS


use Mojo::Headers;
# Parse
my $headers = Mojo::Headers->new;
$headers->parse("Content-Length: 42\x0d\x0a");
$headers->parse("Content-Type: text/html\x0d\x0a\x0d\x0a");
say $headers->content_length;
say $headers->content_type;
# Build
my $headers = Mojo::Headers->new;
$headers->content_length(42);
$headers->content_type('text/plain');
say $headers->to_string;

DESCRIPTION

Mojo::Headers is a container for HTTP headers, based on RFC 7230 <http://tools.ietf.org/html/rfc7230> and RFC 7231 <http://tools.ietf.org/html/rfc7231>.

ATTRIBUTES

Mojo::Headers implements the following attributes.

max_line_size

  my $size = $headers->max_line_size;
  $headers = $headers->max_line_size(1024);

Maximum header line size in bytes, defaults to the value of the "MOJO_MAX_LINE_SIZE" environment variable or 8192 (8KB).

max_lines

  my $num  = $headers->max_lines;
  $headers = $headers->max_lines(200);

Maximum number of header lines, defaults to the value of the "MOJO_MAX_LINES" environment variable or 100.

METHODS

Mojo::Headers inherits all methods from Mojo::Base and implements the following new ones.

accept

  my $accept = $headers->accept;
  $headers   = $headers->accept('application/json');

Get or replace current header value, shortcut for the "Accept" header.

accept_charset

  my $charset = $headers->accept_charset;
  $headers    = $headers->accept_charset('UTF-8');

Get or replace current header value, shortcut for the "Accept-Charset" header.

accept_encoding

  my $encoding = $headers->accept_encoding;
  $headers     = $headers->accept_encoding('gzip');

Get or replace current header value, shortcut for the "Accept-Encoding" header.

accept_language

  my $language = $headers->accept_language;
  $headers     = $headers->accept_language('de, en');

Get or replace current header value, shortcut for the "Accept-Language" header.

accept_ranges

  my $ranges = $headers->accept_ranges;
  $headers   = $headers->accept_ranges('bytes');

Get or replace current header value, shortcut for the "Accept-Ranges" header.

access_control_allow_origin

  my $origin = $headers->access_control_allow_origin;
  $headers   = $headers->access_control_allow_origin('*');

Get or replace current header value, shortcut for the "Access-Control-Allow-Origin" header from Cross-Origin Resource Sharing <http://www.w3.org/TR/cors/>.

add

  $headers = $headers->add(Foo => 'one value');
  $headers = $headers->add(Foo => 'first value', 'second value');

Add header with one or more lines. 

  # "Vary: Accept
  #  Vary: Accept-Encoding"
  $headers->add(Vary => 'Accept')->add(Vary => 'Accept-Encoding')->to_string;

allow

  my $allow = $headers->allow;
  $headers  = $headers->allow('GET, POST');

Get or replace current header value, shortcut for the "Allow" header.

append

  $headers = $headers->append(Vary => 'Accept-Encoding');

Append value to header and flatten it if necessary. 

  # "Vary: Accept"
  $headers->append(Vary => 'Accept')->to_string;
  # "Vary: Accept, Accept-Encoding"
  $headers->vary('Accept')->append(Vary => 'Accept-Encoding')->to_string;

authorization

  my $authorization = $headers->authorization;
  $headers          = $headers->authorization('Basic Zm9vOmJhcg==');

Get or replace current header value, shortcut for the "Authorization" header.

cache_control

  my $cache_control = $headers->cache_control;
  $headers          = $headers->cache_control('max-age=1, no-cache');

Get or replace current header value, shortcut for the "Cache-Control" header.

clone

  my $clone = $headers->clone;

Clone headers.

connection

  my $connection = $headers->connection;
  $headers       = $headers->connection('close');

Get or replace current header value, shortcut for the "Connection" header.

content_disposition

  my $disposition = $headers->content_disposition;
  $headers        = $headers->content_disposition('foo');

Get or replace current header value, shortcut for the "Content-Disposition" header.

content_encoding

  my $encoding = $headers->content_encoding;
  $headers     = $headers->content_encoding('gzip');

Get or replace current header value, shortcut for the "Content-Encoding" header.

content_language

  my $language = $headers->content_language;
  $headers     = $headers->content_language('en');

Get or replace current header value, shortcut for the "Content-Language" header.

content_length

  my $len  = $headers->content_length;
  $headers = $headers->content_length(4000);

Get or replace current header value, shortcut for the "Content-Length" header.

content_location

  my $location = $headers->content_location;
  $headers     = $headers->content_location('http://127.0.0.1/foo');

Get or replace current header value, shortcut for the "Content-Location" header.

content_range

  my $range = $headers->content_range;
  $headers  = $headers->content_range('bytes 2-8/100');

Get or replace current header value, shortcut for the "Content-Range" header.

content_security_policy

  my $policy = $headers->content_security_policy;
  $headers   = $headers->content_security_policy('default-src https:');

Get or replace current header value, shortcut for the "Content-Security-Policy" header from Content Security Policy 1.0 <http://www.w3.org/TR/CSP/>.

content_type

  my $type = $headers->content_type;
  $headers = $headers->content_type('text/plain');

Get or replace current header value, shortcut for the "Content-Type" header.

cookie

  my $cookie = $headers->cookie;
  $headers   = $headers->cookie('f=b');

Get or replace current header value, shortcut for the "Cookie" header from RFC 6265 <http://tools.ietf.org/html/rfc6265>.

date

  my $date = $headers->date;
  $headers = $headers->date('Sun, 17 Aug 2008 16:27:35 GMT');

Get or replace current header value, shortcut for the "Date" header.

dnt

  my $dnt  = $headers->dnt;
  $headers = $headers->dnt(1);

Get or replace current header value, shortcut for the "DNT" (Do Not Track) header, which has no specification yet, but is very commonly used.

etag

  my $etag = $headers->etag;
  $headers = $headers->etag('"abc321"');

Get or replace current header value, shortcut for the "ETag" header.

expect

  my $expect = $headers->expect;
  $headers   = $headers->expect('100-continue');

Get or replace current header value, shortcut for the "Expect" header.

expires

  my $expires = $headers->expires;
  $headers    = $headers->expires('Thu, 01 Dec 1994 16:00:00 GMT');

Get or replace current header value, shortcut for the "Expires" header.

from_hash

  $headers = $headers->from_hash({'Cookie' => 'a=b'});
  $headers = $headers->from_hash({'Cookie' => ['a=b', 'c=d']});
  $headers = $headers->from_hash({});

Parse headers from a hash reference, an empty hash removes all headers.

header

  my $value = $headers->header('Foo');
  $headers  = $headers->header(Foo => 'one value');
  $headers  = $headers->header(Foo => 'first value', 'second value');

Get or replace the current header values.

host

  my $host = $headers->host;
  $headers = $headers->host('127.0.0.1');

Get or replace current header value, shortcut for the "Host" header.

if_modified_since

  my $date = $headers->if_modified_since;
  $headers = $headers->if_modified_since('Sun, 17 Aug 2008 16:27:35 GMT');

Get or replace current header value, shortcut for the "If-Modified-Since" header.

if_none_match

  my $etag = $headers->if_none_match;
  $headers = $headers->if_none_match('"abc321"');

Get or replace current header value, shortcut for the "If-None-Match" header.

is_finished

  my $bool = $headers->is_finished;

Check if header parser is finished.

is_limit_exceeded

  my $bool = $headers->is_limit_exceeded;

Check if headers have exceeded ``max_line_size'' or ``max_lines''.

last_modified

  my $date = $headers->last_modified;
  $headers = $headers->last_modified('Sun, 17 Aug 2008 16:27:35 GMT');

Get or replace current header value, shortcut for the "Last-Modified" header.

leftovers

  my $bytes = $headers->leftovers;

Get and remove leftover data from header parser.

link

  my $link = $headers->link;
  $headers = $headers->link('<http://127.0.0.1/foo/3>; rel="next"');

Get or replace current header value, shortcut for the "Link" header from RFC 5988 <http://tools.ietf.org/html/rfc5988>.

location

  my $location = $headers->location;
  $headers     = $headers->location('http://127.0.0.1/foo');

Get or replace current header value, shortcut for the "Location" header.

names

  my $names = $headers->names;

Return an array reference with all currently defined headers. 

  # Names of all headers
  say for @{$headers->names};

origin

  my $origin = $headers->origin;
  $headers   = $headers->origin('http://example.com');

Get or replace current header value, shortcut for the "Origin" header from RFC 6454 <http://tools.ietf.org/html/rfc6454>.

parse

  $headers = $headers->parse("Content-Type: text/plain\x0d\x0a\x0d\x0a");

Parse formatted headers.

proxy_authenticate

  my $authenticate = $headers->proxy_authenticate;
  $headers         = $headers->proxy_authenticate('Basic "realm"');

Get or replace current header value, shortcut for the "Proxy-Authenticate" header.

proxy_authorization

  my $authorization = $headers->proxy_authorization;
  $headers          = $headers->proxy_authorization('Basic Zm9vOmJhcg==');

Get or replace current header value, shortcut for the "Proxy-Authorization" header.

range

  my $range = $headers->range;
  $headers  = $headers->range('bytes=2-8');

Get or replace current header value, shortcut for the "Range" header.

referrer

  my $referrer = $headers->referrer;
  $headers     = $headers->referrer('http://example.com');

Get or replace current header value, shortcut for the "Referer" header, there was a typo in RFC 2068 <http://tools.ietf.org/html/rfc2068> which resulted in "Referer" becoming an official header.

remove

  $headers = $headers->remove('Foo');

Remove a header.

sec_websocket_accept

  my $accept = $headers->sec_websocket_accept;
  $headers   = $headers->sec_websocket_accept('s3pPLMBiTxaQ9kYGzzhZRbK+xOo=');

Get or replace current header value, shortcut for the "Sec-WebSocket-Accept" header from RFC 6455 <http://tools.ietf.org/html/rfc6455>.

sec_websocket_extensions

  my $extensions = $headers->sec_websocket_extensions;
  $headers       = $headers->sec_websocket_extensions('foo');

Get or replace current header value, shortcut for the "Sec-WebSocket-Extensions" header from RFC 6455 <http://tools.ietf.org/html/rfc6455>.

sec_websocket_key

  my $key  = $headers->sec_websocket_key;
  $headers = $headers->sec_websocket_key('dGhlIHNhbXBsZSBub25jZQ==');

Get or replace current header value, shortcut for the "Sec-WebSocket-Key" header from RFC 6455 <http://tools.ietf.org/html/rfc6455>.

sec_websocket_protocol

  my $proto = $headers->sec_websocket_protocol;
  $headers  = $headers->sec_websocket_protocol('sample');

Get or replace current header value, shortcut for the "Sec-WebSocket-Protocol" header from RFC 6455 <http://tools.ietf.org/html/rfc6455>.

sec_websocket_version

  my $version = $headers->sec_websocket_version;
  $headers    = $headers->sec_websocket_version(13);

Get or replace current header value, shortcut for the "Sec-WebSocket-Version" header from RFC 6455 <http://tools.ietf.org/html/rfc6455>.

server

  my $server = $headers->server;
  $headers   = $headers->server('Mojo');

Get or replace current header value, shortcut for the "Server" header.

set_cookie

  my $cookie = $headers->set_cookie;
  $headers   = $headers->set_cookie('f=b; path=/');

Get or replace current header value, shortcut for the "Set-Cookie" header from RFC 6265 <http://tools.ietf.org/html/rfc6265>.

status

  my $status = $headers->status;
  $headers   = $headers->status('200 OK');

Get or replace current header value, shortcut for the "Status" header from RFC 3875 <http://tools.ietf.org/html/rfc3875>.

strict_transport_security

  my $policy = $headers->strict_transport_security;
  $headers   = $headers->strict_transport_security('max-age=31536000');

Get or replace current header value, shortcut for the "Strict-Transport-Security" header from RFC 6797 <http://tools.ietf.org/html/rfc6797>.

te

  my $te   = $headers->te;
  $headers = $headers->te('chunked');

Get or replace current header value, shortcut for the "TE" header.

to_hash

  my $single = $headers->to_hash;
  my $multi  = $headers->to_hash(1);

Turn headers into hash reference, array references to represent multiple headers with the same name are disabled by default. 

  say $headers->to_hash->{DNT};

to_string

  my $str = $headers->to_string;

Turn headers into a string, suitable for HTTP messages.

trailer

  my $trailer = $headers->trailer;
  $headers    = $headers->trailer('X-Foo');

Get or replace current header value, shortcut for the "Trailer" header.

transfer_encoding

  my $encoding = $headers->transfer_encoding;
  $headers     = $headers->transfer_encoding('chunked');

Get or replace current header value, shortcut for the "Transfer-Encoding" header.

upgrade

  my $upgrade = $headers->upgrade;
  $headers    = $headers->upgrade('websocket');

Get or replace current header value, shortcut for the "Upgrade" header.

user_agent

  my $agent = $headers->user_agent;
  $headers  = $headers->user_agent('Mojo/1.0');

Get or replace current header value, shortcut for the "User-Agent" header.

vary

  my $vary = $headers->vary;
  $headers = $headers->vary('*');

Get or replace current header value, shortcut for the "Vary" header.

www_authenticate

  my $authenticate = $headers->www_authenticate;
  $headers         = $headers->www_authenticate('Basic realm="realm"');

Get or replace current header value, shortcut for the "WWW-Authenticate" header.

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