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.\" ========================================================================
.\"
.IX Title "Mojo::Headers 3pm"
.TH Mojo::Headers 3pm "2012-09-05" "perl v5.14.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Mojo::Headers \- Headers
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojo::Headers;
\&
\&  my $headers = Mojo::Headers\->new;
\&  $headers\->content_type(\*(Aqtext/plain\*(Aq);
\&  $headers\->parse("Content\-Type: text/html\en\en");
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::Headers is a container and parser for \s-1HTTP\s0 headers.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Mojo::Headers implements the following attributes.
.ie n .SS """max_line_size"""
.el .SS "\f(CWmax_line_size\fP"
.IX Subsection "max_line_size"
.Vb 2
\&  my $size = $headers\->max_line_size;
\&  $headers = $headers\->max_line_size(1024);
.Ve
.PP
Maximum line size in bytes, defaults to the value of the
\&\f(CW\*(C`MOJO_MAX_LINE_SIZE\*(C'\fR environment variable or \f(CW10240\fR.
.SH "METHODS"
.IX Header "METHODS"
Mojo::Headers inherits all methods from Mojo::Base and implements the
following new ones.
.ie n .SS """accept"""
.el .SS "\f(CWaccept\fP"
.IX Subsection "accept"
.Vb 2
\&  my $accept = $headers\->accept;
\&  $headers   = $headers\->accept(\*(Aqapplication/json\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Accept\*(C'\fR header.
.ie n .SS """accept_language"""
.el .SS "\f(CWaccept_language\fP"
.IX Subsection "accept_language"
.Vb 2
\&  my $accept_language = $headers\->accept_language;
\&  $headers            = $headers\->accept_language(\*(Aqde, en\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Accept\-Language\*(C'\fR header.
.ie n .SS """accept_ranges"""
.el .SS "\f(CWaccept_ranges\fP"
.IX Subsection "accept_ranges"
.Vb 2
\&  my $ranges = $headers\->accept_ranges;
\&  $headers   = $headers\->accept_ranges(\*(Aqbytes\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Accept\-Ranges\*(C'\fR header.
.ie n .SS """add"""
.el .SS "\f(CWadd\fP"
.IX Subsection "add"
.Vb 1
\&  $headers = $headers\->add(\*(AqContent\-Type\*(Aq, \*(Aqtext/plain\*(Aq);
.Ve
.PP
Add one or more header lines.
.ie n .SS """authorization"""
.el .SS "\f(CWauthorization\fP"
.IX Subsection "authorization"
.Vb 2
\&  my $authorization = $headers\->authorization;
\&  $headers          = $headers\->authorization(\*(AqBasic Zm9vOmJhcg==\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Authorization\*(C'\fR header.
.ie n .SS """cache_control"""
.el .SS "\f(CWcache_control\fP"
.IX Subsection "cache_control"
.Vb 2
\&  my $cache_control = $headers\->cache_control;
\&  $headers          = $headers\->cache_control(\*(Aqmax\-age=1, no\-cache\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Cache\-Control\*(C'\fR header.
.ie n .SS """clone"""
.el .SS "\f(CWclone\fP"
.IX Subsection "clone"
.Vb 1
\&  my $clone = $headers\->clone;
.Ve
.PP
Clone headers.
.ie n .SS """connection"""
.el .SS "\f(CWconnection\fP"
.IX Subsection "connection"
.Vb 2
\&  my $connection = $headers\->connection;
\&  $headers       = $headers\->connection(\*(Aqclose\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Connection\*(C'\fR header.
.ie n .SS """content_disposition"""
.el .SS "\f(CWcontent_disposition\fP"
.IX Subsection "content_disposition"
.Vb 2
\&  my $content_disposition = $headers\->content_disposition;
\&  $headers                = $headers\->content_disposition(\*(Aqfoo\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Content\-Disposition\*(C'\fR header.
.ie n .SS """content_length"""
.el .SS "\f(CWcontent_length\fP"
.IX Subsection "content_length"
.Vb 2
\&  my $content_length = $headers\->content_length;
\&  $headers           = $headers\->content_length(4000);
.Ve
.PP
Shortcut for the \f(CW\*(C`Content\-Length\*(C'\fR header.
.ie n .SS """content_range"""
.el .SS "\f(CWcontent_range\fP"
.IX Subsection "content_range"
.Vb 2
\&  my $range = $headers\->content_range;
\&  $headers  = $headers\->content_range(\*(Aqbytes 2\-8/100\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Content\-Range\*(C'\fR header.
.ie n .SS """content_transfer_encoding"""
.el .SS "\f(CWcontent_transfer_encoding\fP"
.IX Subsection "content_transfer_encoding"
.Vb 2
\&  my $encoding = $headers\->content_transfer_encoding;
\&  $headers     = $headers\->content_transfer_encoding(\*(Aqfoo\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Content\-Transfer\-Encoding\*(C'\fR header.
.ie n .SS """content_type"""
.el .SS "\f(CWcontent_type\fP"
.IX Subsection "content_type"
.Vb 2
\&  my $content_type = $headers\->content_type;
\&  $headers         = $headers\->content_type(\*(Aqtext/plain\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Content\-Type\*(C'\fR header.
.ie n .SS """cookie"""
.el .SS "\f(CWcookie\fP"
.IX Subsection "cookie"
.Vb 2
\&  my $cookie = $headers\->cookie;
\&  $headers   = $headers\->cookie(\*(Aqf=b\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Cookie\*(C'\fR header.
.ie n .SS """date"""
.el .SS "\f(CWdate\fP"
.IX Subsection "date"
.Vb 2
\&  my $date = $headers\->date;
\&  $headers = $headers\->date(\*(AqSun, 17 Aug 2008 16:27:35 GMT\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Date\*(C'\fR header.
.ie n .SS """dnt"""
.el .SS "\f(CWdnt\fP"
.IX Subsection "dnt"
.Vb 2
\&  my $dnt  = $headers\->dnt;
\&  $headers = $headers\->dnt(1);
.Ve
.PP
Shortcut for the \f(CW\*(C`DNT\*(C'\fR (Do Not Track) header.
.ie n .SS """etag"""
.el .SS "\f(CWetag\fP"
.IX Subsection "etag"
.Vb 2
\&  my $etag = $headers\->etag;
\&  $headers = $headers\->etag(\*(Aqabc321\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`ETag\*(C'\fR header.
.ie n .SS """expect"""
.el .SS "\f(CWexpect\fP"
.IX Subsection "expect"
.Vb 2
\&  my $expect = $headers\->expect;
\&  $headers   = $headers\->expect(\*(Aq100\-continue\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Expect\*(C'\fR header.
.ie n .SS """expires"""
.el .SS "\f(CWexpires\fP"
.IX Subsection "expires"
.Vb 2
\&  my $expires = $headers\->expires;
\&  $headers    = $headers\->expires(\*(AqThu, 01 Dec 1994 16:00:00 GMT\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Expires\*(C'\fR header.
.ie n .SS """from_hash"""
.el .SS "\f(CWfrom_hash\fP"
.IX Subsection "from_hash"
.Vb 1
\&  $headers = $headers\->from_hash({\*(AqContent\-Type\*(Aq => \*(Aqtext/html\*(Aq});
.Ve
.PP
Parse headers from a hash reference.
.ie n .SS """header"""
.el .SS "\f(CWheader\fP"
.IX Subsection "header"
.Vb 3
\&  my $string = $headers\->header(\*(AqContent\-Type\*(Aq);
\&  my @lines  = $headers\->header(\*(AqContent\-Type\*(Aq);
\&  $headers   = $headers\->header(\*(AqContent\-Type\*(Aq => \*(Aqtext/plain\*(Aq);
.Ve
.PP
Get or replace the current header values.
.PP
.Vb 3
\&  # Multiple headers with the same name
\&  for my $header ($headers\->header(\*(AqSet\-Cookie\*(Aq)) {
\&    say \*(AqSet\-Cookie:\*(Aq;
\&
\&    # Multiple lines per header
\&    say for @$header;
\&  }
.Ve
.ie n .SS """host"""
.el .SS "\f(CWhost\fP"
.IX Subsection "host"
.Vb 2
\&  my $host = $headers\->host;
\&  $headers = $headers\->host(\*(Aq127.0.0.1\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Host\*(C'\fR header.
.ie n .SS """if_modified_since"""
.el .SS "\f(CWif_modified_since\fP"
.IX Subsection "if_modified_since"
.Vb 2
\&  my $m    = $headers\->if_modified_since;
\&  $headers = $headers\->if_modified_since(\*(AqSun, 17 Aug 2008 16:27:35 GMT\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`If\-Modified\-Since\*(C'\fR header.
.ie n .SS """is_finished"""
.el .SS "\f(CWis_finished\fP"
.IX Subsection "is_finished"
.Vb 1
\&  my $success = $headers\->is_finished;
.Ve
.PP
Check if header parser is finished.
.ie n .SS """is_limit_exceeded"""
.el .SS "\f(CWis_limit_exceeded\fP"
.IX Subsection "is_limit_exceeded"
.Vb 1
\&  my $success = $headers\->is_limit_exceeded;
.Ve
.PP
Check if a header has exceeded \f(CW\*(C`max_line_size\*(C'\fR.
.ie n .SS """last_modified"""
.el .SS "\f(CWlast_modified\fP"
.IX Subsection "last_modified"
.Vb 2
\&  my $m    = $headers\->last_modified;
\&  $headers = $headers\->last_modified(\*(AqSun, 17 Aug 2008 16:27:35 GMT\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Last\-Modified\*(C'\fR header.
.ie n .SS """leftovers"""
.el .SS "\f(CWleftovers\fP"
.IX Subsection "leftovers"
.Vb 1
\&  my $leftovers = $headers\->leftovers;
.Ve
.PP
Leftovers.
.ie n .SS """location"""
.el .SS "\f(CWlocation\fP"
.IX Subsection "location"
.Vb 2
\&  my $location = $headers\->location;
\&  $headers     = $headers\->location(\*(Aqhttp://127.0.0.1/foo\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Location\*(C'\fR header.
.ie n .SS """names"""
.el .SS "\f(CWnames\fP"
.IX Subsection "names"
.Vb 1
\&  my $names = $headers\->names;
.Ve
.PP
Generate a list of all currently defined headers.
.ie n .SS """parse"""
.el .SS "\f(CWparse\fP"
.IX Subsection "parse"
.Vb 1
\&  $headers = $headers\->parse("Content\-Type: text/foo\en\en");
.Ve
.PP
Parse formatted headers.
.ie n .SS """proxy_authenticate"""
.el .SS "\f(CWproxy_authenticate\fP"
.IX Subsection "proxy_authenticate"
.Vb 2
\&  my $authenticate = $headers\->proxy_authenticate;
\&  $headers         = $headers\->proxy_authenticate(\*(AqBasic "realm"\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Proxy\-Authenticate\*(C'\fR header.
.ie n .SS """proxy_authorization"""
.el .SS "\f(CWproxy_authorization\fP"
.IX Subsection "proxy_authorization"
.Vb 2
\&  my $proxy_authorization = $headers\->proxy_authorization;
\&  $headers = $headers\->proxy_authorization(\*(AqBasic Zm9vOmJhcg==\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Proxy\-Authorization\*(C'\fR header.
.ie n .SS """range"""
.el .SS "\f(CWrange\fP"
.IX Subsection "range"
.Vb 2
\&  my $range = $headers\->range;
\&  $headers  = $headers\->range(\*(Aqbytes=2\-8\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Range\*(C'\fR header.
.ie n .SS """referrer"""
.el .SS "\f(CWreferrer\fP"
.IX Subsection "referrer"
.Vb 2
\&  my $referrer = $headers\->referrer;
\&  $headers     = $headers\->referrer(\*(Aqhttp://mojolicio.us\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Referer\*(C'\fR header, there was a typo in \s-1RFC\s0 2068 which
resulted in \f(CW\*(C`Referer\*(C'\fR becoming an official header.
.ie n .SS """remove"""
.el .SS "\f(CWremove\fP"
.IX Subsection "remove"
.Vb 1
\&  $headers = $headers\->remove(\*(AqContent\-Type\*(Aq);
.Ve
.PP
Remove a header.
.ie n .SS """sec_websocket_accept"""
.el .SS "\f(CWsec_websocket_accept\fP"
.IX Subsection "sec_websocket_accept"
.Vb 2
\&  my $accept = $headers\->sec_websocket_accept;
\&  $headers   = $headers\->sec_websocket_accept(\*(Aqs3pPLMBiTxaQ9kYGzzhZRbK+xOo=\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Sec\-WebSocket\-Accept\*(C'\fR header.
.ie n .SS """sec_websocket_key"""
.el .SS "\f(CWsec_websocket_key\fP"
.IX Subsection "sec_websocket_key"
.Vb 2
\&  my $key  = $headers\->sec_websocket_key;
\&  $headers = $headers\->sec_websocket_key(\*(AqdGhlIHNhbXBsZSBub25jZQ==\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Sec\-WebSocket\-Key\*(C'\fR header.
.ie n .SS """sec_websocket_origin"""
.el .SS "\f(CWsec_websocket_origin\fP"
.IX Subsection "sec_websocket_origin"
.Vb 2
\&  my $origin = $headers\->sec_websocket_origin;
\&  $headers   = $headers\->sec_websocket_origin(\*(Aqhttp://example.com\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Sec\-WebSocket\-Origin\*(C'\fR header.
.ie n .SS """sec_websocket_protocol"""
.el .SS "\f(CWsec_websocket_protocol\fP"
.IX Subsection "sec_websocket_protocol"
.Vb 2
\&  my $protocol = $headers\->sec_websocket_protocol;
\&  $headers     = $headers\->sec_websocket_protocol(\*(Aqsample\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Sec\-WebSocket\-Protocol\*(C'\fR header.
.ie n .SS """sec_websocket_version"""
.el .SS "\f(CWsec_websocket_version\fP"
.IX Subsection "sec_websocket_version"
.Vb 2
\&  my $version = $headers\->sec_websocket_version;
\&  $headers    = $headers\->sec_websocket_version(13);
.Ve
.PP
Shortcut for the \f(CW\*(C`Sec\-WebSocket\-Version\*(C'\fR header.
.ie n .SS """server"""
.el .SS "\f(CWserver\fP"
.IX Subsection "server"
.Vb 2
\&  my $server = $headers\->server;
\&  $headers   = $headers\->server(\*(AqMojo\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Server\*(C'\fR header.
.ie n .SS """set_cookie"""
.el .SS "\f(CWset_cookie\fP"
.IX Subsection "set_cookie"
.Vb 2
\&  my $set_cookie = $headers\->set_cookie;
\&  $headers       = $headers\->set_cookie(\*(Aqf=b; path=/\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Set\-Cookie\*(C'\fR header.
.ie n .SS """status"""
.el .SS "\f(CWstatus\fP"
.IX Subsection "status"
.Vb 2
\&  my $status = $headers\->status;
\&  $headers   = $headers\->status(\*(Aq200 OK\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Status\*(C'\fR header.
.ie n .SS """to_hash"""
.el .SS "\f(CWto_hash\fP"
.IX Subsection "to_hash"
.Vb 2
\&  my $single = $headers\->to_hash;
\&  my $multi  = $headers\->to_hash(1);
.Ve
.PP
Turn headers into hash reference, nested array references to represent multi
line values are disabled by default.
.ie n .SS """to_string"""
.el .SS "\f(CWto_string\fP"
.IX Subsection "to_string"
.Vb 1
\&  my $string = $headers\->to_string;
.Ve
.PP
Turn headers into a string, suitable for \s-1HTTP\s0 1.1 messages.
.ie n .SS """trailer"""
.el .SS "\f(CWtrailer\fP"
.IX Subsection "trailer"
.Vb 2
\&  my $trailer = $headers\->trailer;
\&  $headers    = $headers\->trailer(\*(AqX\-Foo\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Trailer\*(C'\fR header.
.ie n .SS """transfer_encoding"""
.el .SS "\f(CWtransfer_encoding\fP"
.IX Subsection "transfer_encoding"
.Vb 2
\&  my $transfer_encoding = $headers\->transfer_encoding;
\&  $headers              = $headers\->transfer_encoding(\*(Aqchunked\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Transfer\-Encoding\*(C'\fR header.
.ie n .SS """upgrade"""
.el .SS "\f(CWupgrade\fP"
.IX Subsection "upgrade"
.Vb 2
\&  my $upgrade = $headers\->upgrade;
\&  $headers    = $headers\->upgrade(\*(Aqwebsocket\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`Upgrade\*(C'\fR header.
.ie n .SS """user_agent"""
.el .SS "\f(CWuser_agent\fP"
.IX Subsection "user_agent"
.Vb 2
\&  my $user_agent = $headers\->user_agent;
\&  $headers       = $headers\->user_agent(\*(AqMojo/1.0\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`User\-Agent\*(C'\fR header.
.ie n .SS """www_authenticate"""
.el .SS "\f(CWwww_authenticate\fP"
.IX Subsection "www_authenticate"
.Vb 2
\&  my $authenticate = $headers\->www_authenticate;
\&  $headers         = $headers\->www_authenticate(\*(AqBasic realm="realm"\*(Aq);
.Ve
.PP
Shortcut for the \f(CW\*(C`WWW\-Authenticate\*(C'\fR header.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.