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.\" ========================================================================
.\"
.IX Title "Mojo::Content 3pm"
.TH Mojo::Content 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::Content \- HTTP 1.1 content base class
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use Mojo::Base \*(AqMojo::Content\*(Aq;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::Content is an abstract base class for \s-1HTTP\s0 1.1 content as described
in \s-1RFC\s0 2616.
.SH "EVENTS"
.IX Header "EVENTS"
Mojo::Content can emit the following events.
.ie n .SS """drain"""
.el .SS "\f(CWdrain\fP"
.IX Subsection "drain"
.Vb 4
\&  $content\->on(drain => sub {
\&    my ($content, $offset) = @_;
\&    ...
\&  });
.Ve
.PP
Emitted once all data has been written.
.PP
.Vb 4
\&  $content\->on(drain => sub {
\&    my $content = shift;
\&    $content\->write_chunk(time);
\&  });
.Ve
.ie n .SS """body"""
.el .SS "\f(CWbody\fP"
.IX Subsection "body"
.Vb 4
\&  $content\->on(body => sub {
\&    my $content = shift;
\&    ...
\&  });
.Ve
.PP
Emitted once all headers have been parsed and the body starts.
.PP
.Vb 4
\&  $content\->on(body => sub {
\&    my $content = shift;
\&    $content\->auto_upgrade(0) if $content\->headers\->header(\*(AqX\-No\-MultiPart\*(Aq);
\&  });
.Ve
.ie n .SS """read"""
.el .SS "\f(CWread\fP"
.IX Subsection "read"
.Vb 4
\&  $content\->on(read => sub {
\&    my ($content, $chunk) = @_;
\&    ...
\&  });
.Ve
.PP
Emitted when a new chunk of content arrives.
.PP
.Vb 5
\&  $content\->unsubscribe(\*(Aqread\*(Aq);
\&  $content\->on(read => sub {
\&    my ($content, $chunk) = @_;
\&    say "Streaming: $chunk";
\&  });
.Ve
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
Mojo::Content implements the following attributes.
.ie n .SS """auto_relax"""
.el .SS "\f(CWauto_relax\fP"
.IX Subsection "auto_relax"
.Vb 2
\&  my $relax = $content\->auto_relax;
\&  $content  = $content\->auto_relax(1);
.Ve
.PP
Try to detect broken web servers and turn on relaxed parsing automatically.
.ie n .SS """headers"""
.el .SS "\f(CWheaders\fP"
.IX Subsection "headers"
.Vb 2
\&  my $headers = $content\->headers;
\&  $content    = $content\->headers(Mojo::Headers\->new);
.Ve
.PP
Content headers, defaults to a Mojo::Headers object.
.ie n .SS """max_leftover_size"""
.el .SS "\f(CWmax_leftover_size\fP"
.IX Subsection "max_leftover_size"
.Vb 2
\&  my $size = $content\->max_leftover_size;
\&  $content = $content\->max_leftover_size(1024);
.Ve
.PP
Maximum size in bytes of buffer for pipelined \s-1HTTP\s0 requests, defaults to the
value of the \f(CW\*(C`MOJO_MAX_LEFTOVER_SIZE\*(C'\fR environment variable or \f(CW262144\fR.
.ie n .SS """relaxed"""
.el .SS "\f(CWrelaxed\fP"
.IX Subsection "relaxed"
.Vb 2
\&  my $relaxed = $content\->relaxed;
\&  $content    = $content\->relaxed(1);
.Ve
.PP
Activate relaxed parsing for \s-1HTTP\s0 0.9 and responses that are terminated with a
connection close.
.SH "METHODS"
.IX Header "METHODS"
Mojo::Content inherits all methods from Mojo::EventEmitter and
implements the following new ones.
.ie n .SS """body_contains"""
.el .SS "\f(CWbody_contains\fP"
.IX Subsection "body_contains"
.Vb 1
\&  my $success = $content\->body_contains(\*(Aqfoo bar baz\*(Aq);
.Ve
.PP
Check if content contains a specific string. Meant to be overloaded in a
subclass.
.ie n .SS """body_size"""
.el .SS "\f(CWbody_size\fP"
.IX Subsection "body_size"
.Vb 1
\&  my $size = $content\->body_size;
.Ve
.PP
Content size in bytes. Meant to be overloaded in a subclass.
.ie n .SS """boundary"""
.el .SS "\f(CWboundary\fP"
.IX Subsection "boundary"
.Vb 1
\&  my $boundary = $content\->boundary;
.Ve
.PP
Extract multipart boundary from \f(CW\*(C`Content\-Type\*(C'\fR header.
.ie n .SS """build_body"""
.el .SS "\f(CWbuild_body\fP"
.IX Subsection "build_body"
.Vb 1
\&  my $string = $content\->build_body;
.Ve
.PP
Render whole body.
.ie n .SS """build_headers"""
.el .SS "\f(CWbuild_headers\fP"
.IX Subsection "build_headers"
.Vb 1
\&  my $string = $content\->build_headers;
.Ve
.PP
Render all headers.
.ie n .SS """charset"""
.el .SS "\f(CWcharset\fP"
.IX Subsection "charset"
.Vb 1
\&  my $charset = $content\->charset;
.Ve
.PP
Extract charset from \f(CW\*(C`Content\-Type\*(C'\fR header.
.ie n .SS """clone"""
.el .SS "\f(CWclone\fP"
.IX Subsection "clone"
.Vb 1
\&  my $clone = $content\->clone;
.Ve
.PP
Clone content if possible, otherwise return \f(CW\*(C`undef\*(C'\fR.
.ie n .SS """generate_body_chunk"""
.el .SS "\f(CWgenerate_body_chunk\fP"
.IX Subsection "generate_body_chunk"
.Vb 1
\&  my $chunk = $content\->generate_body_chunk(0);
.Ve
.PP
Generate dynamic content.
.ie n .SS """get_body_chunk"""
.el .SS "\f(CWget_body_chunk\fP"
.IX Subsection "get_body_chunk"
.Vb 1
\&  my $chunk = $content\->get_body_chunk(0);
.Ve
.PP
Get a chunk of content starting from a specfic position. Meant to be
overloaded in a subclass.
.ie n .SS """get_header_chunk"""
.el .SS "\f(CWget_header_chunk\fP"
.IX Subsection "get_header_chunk"
.Vb 1
\&  my $chunk = $content\->get_header_chunk(13);
.Ve
.PP
Get a chunk of the headers starting from a specfic position.
.ie n .SS """has_leftovers"""
.el .SS "\f(CWhas_leftovers\fP"
.IX Subsection "has_leftovers"
.Vb 1
\&  my $success = $content\->has_leftovers;
.Ve
.PP
Check if there are leftovers.
.ie n .SS """header_size"""
.el .SS "\f(CWheader_size\fP"
.IX Subsection "header_size"
.Vb 1
\&  my $size = $content\->header_size;
.Ve
.PP
Size of headers in bytes.
.ie n .SS """is_chunked"""
.el .SS "\f(CWis_chunked\fP"
.IX Subsection "is_chunked"
.Vb 1
\&  my $success = $content\->is_chunked;
.Ve
.PP
Check if content is chunked.
.ie n .SS """is_dynamic"""
.el .SS "\f(CWis_dynamic\fP"
.IX Subsection "is_dynamic"
.Vb 1
\&  my $success = $content\->is_dynamic;
.Ve
.PP
Check if content will be dynamically generated, which prevents \f(CW\*(C`clone\*(C'\fR from
working.
.ie n .SS """is_finished"""
.el .SS "\f(CWis_finished\fP"
.IX Subsection "is_finished"
.Vb 1
\&  my $success = $content\->is_finished;
.Ve
.PP
Check if parser is finished.
.ie n .SS """is_multipart"""
.el .SS "\f(CWis_multipart\fP"
.IX Subsection "is_multipart"
.Vb 1
\&  my $false = $content\->is_multipart;
.Ve
.PP
False.
.ie n .SS """is_parsing_body"""
.el .SS "\f(CWis_parsing_body\fP"
.IX Subsection "is_parsing_body"
.Vb 1
\&  my $success = $content\->is_parsing_body;
.Ve
.PP
Check if body parsing started yet.
.ie n .SS """leftovers"""
.el .SS "\f(CWleftovers\fP"
.IX Subsection "leftovers"
.Vb 1
\&  my $bytes = $content\->leftovers;
.Ve
.PP
Get leftover data from content parser.
.ie n .SS """parse"""
.el .SS "\f(CWparse\fP"
.IX Subsection "parse"
.Vb 1
\&  $content = $content\->parse("Content\-Length: 12\er\en\er\enHello World!");
.Ve
.PP
Parse content chunk.
.ie n .SS """parse_body"""
.el .SS "\f(CWparse_body\fP"
.IX Subsection "parse_body"
.Vb 1
\&  $content = $content\->parse_body("Hi!");
.Ve
.PP
Parse body chunk.
.ie n .SS """parse_body_once"""
.el .SS "\f(CWparse_body_once\fP"
.IX Subsection "parse_body_once"
.Vb 1
\&  $content = $content\->parse_body_once("Hi!");
.Ve
.PP
Parse body chunk once.
.ie n .SS """parse_until_body"""
.el .SS "\f(CWparse_until_body\fP"
.IX Subsection "parse_until_body"
.Vb 2
\&  $content
\&    = $content\->parse_until_body("Content\-Length: 12\er\en\er\enHello World!");
.Ve
.PP
Parse chunk and stop after headers.
.ie n .SS """progress"""
.el .SS "\f(CWprogress\fP"
.IX Subsection "progress"
.Vb 1
\&  my $size = $content\->progress;
.Ve
.PP
Size of content already received from message in bytes.
.ie n .SS """write"""
.el .SS "\f(CWwrite\fP"
.IX Subsection "write"
.Vb 2
\&  $content\->write(\*(AqHello!\*(Aq);
\&  $content\->write(\*(AqHello!\*(Aq, sub {...});
.Ve
.PP
Write dynamic content non-blocking, the optional drain callback will be
invoked once all data has been written.
.ie n .SS """write_chunk"""
.el .SS "\f(CWwrite_chunk\fP"
.IX Subsection "write_chunk"
.Vb 2
\&  $content\->write_chunk(\*(AqHello!\*(Aq);
\&  $content\->write_chunk(\*(AqHello!\*(Aq, sub {...});
.Ve
.PP
Write dynamic content non-blocking with \f(CW\*(C`chunked\*(C'\fR transfer encoding, the
optional drain callback will be invoked once all data has been written.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.