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.\" ========================================================================
.\"
.IX Title "Feersum::Connection 3pm"
.TH Feersum::Connection 3pm "2020-12-09" "perl v5.32.0" "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"
Feersum::Connection \- HTTP connection encapsulation
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
For a streaming response:
.PP
.Vb 9
\&    Feersum\->endjinn\->request_handler(sub {
\&        my $req = shift; # this is a Feersum::Connection object
\&        my $env = $req\->env();
\&        my $w = $req\->start_streaming(200, [\*(AqContent\-Type\*(Aq => \*(Aqtext/plain\*(Aq]);
\&        # then immediately or after some time:
\&        $w\->write("Ergrates ");
\&        $w\->write(\e"FTW.");
\&        $w\->close();
\&    });
.Ve
.PP
For a response with a Content-Length header:
.PP
.Vb 6
\&    Feersum\->endjinn\->request_handler(sub {
\&        my $req = shift; # this is a Feersum::Connection object
\&        my $env = $req\->env();
\&        $req\->start_whole_response(200, [\*(AqContent\-Type\*(Aq => \*(Aqtext/plain\*(Aq]);
\&        $req\->write_whole_body(\e"Ergrates FTW.");
\&    });
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Encapsulates an \s-1HTTP\s0 connection to Feersum.  It's roughly analogous to an
\&\f(CW\*(C`Apache::Request\*(C'\fR or \f(CW\*(C`Apache2::Connection\*(C'\fR object, but differs significantly
in functionality.
.PP
Until Keep-Alive functionality is supported (if ever) this means that a
connection is \fBalso\fR a request.
.PP
See Feersum for more examples on usage.
.SH "METHODS"
.IX Header "METHODS"
.ie n .IP """my $env = $req\->env()""" 4
.el .IP "\f(CWmy $env = $req\->env()\fR" 4
.IX Item "my $env = $req->env()"
Obtain an environment hash.  This hash contains the same entries as for a \s-1PSGI\s0
handler environment hash.  See Feersum for details on the contents.
.Sp
This is a method instead of a parameter so that future versions of Feersum can
request a slice of the hash for speed.
.ie n .IP """my $w = $req\->start_streaming($code, \e@headers)""" 4
.el .IP "\f(CWmy $w = $req\->start_streaming($code, \e@headers)\fR" 4
.IX Item "my $w = $req->start_streaming($code, @headers)"
A full \s-1HTTP\s0 header section is sent with \*(L"Transfer-Encoding: chunked\*(R" (or
\&\*(L"Connection: close\*(R" for \s-1HTTP/1.0\s0 clients).
.Sp
Returns a \f(CW\*(C`Feersum::Connection::Writer\*(C'\fR handle which should be used to
complete the response.  See Feersum::Connection::Handle for methods.
.ie n .IP """$req\->send_response($code, \e@headers, $body)""" 4
.el .IP "\f(CW$req\->send_response($code, \e@headers, $body)\fR" 4
.IX Item "$req->send_response($code, @headers, $body)"
.PD 0
.ie n .IP """$req\->send_response($code, \e@headers, \e@body)""" 4
.el .IP "\f(CW$req\->send_response($code, \e@headers, \e@body)\fR" 4
.IX Item "$req->send_response($code, @headers, @body)"
.PD
Respond with a full \s-1HTTP\s0 header (including \f(CW\*(C`Content\-Length\*(C'\fR) and body.
.Sp
Returns the number of bytes calculated for the body.
.ie n .IP """$req\->force_http10""" 4
.el .IP "\f(CW$req\->force_http10\fR" 4
.IX Item "$req->force_http10"
.PD 0
.ie n .IP """$req\->force_http11""" 4
.el .IP "\f(CW$req\->force_http11\fR" 4
.IX Item "$req->force_http11"
.PD
Force the response to use \s-1HTTP/1.0\s0 or \s-1HTTP/1.1,\s0 respectively.
.Sp
Normally, if the request was made with 1.1 then Feersum uses \s-1HTTP/1.1\s0 for the
response, otherwise \s-1HTTP/1.0\s0 is used (this includes requests made with the
\&\s-1HTTP \*(L"0.9\*(R"\s0 non-declaration).
.Sp
For streaming under \s-1HTTP/1.1\s0 \f(CW\*(C`Transfer\-Encoding: chunked\*(C'\fR is used, otherwise
a \f(CW\*(C`Connection: close\*(C'\fR stream-style is used (with the usual non-guarantees
about delivery).  You may know about certain user-agents that
support/don't\-support T\-E:chunked, so this is how you can override that.
.Sp
Supposedly clients and a lot of proxies support the \f(CW\*(C`Connection: close\*(C'\fR
stream-style, see support in Varnish at
http://www.varnish\-cache.org/trac/ticket/400
.ie n .IP """$req\->fileno""" 4
.el .IP "\f(CW$req\->fileno\fR" 4
.IX Item "$req->fileno"
The socket file-descriptor number for this connection.
.ie n .IP """$req\->response_guard($guard)""" 4
.el .IP "\f(CW$req\->response_guard($guard)\fR" 4
.IX Item "$req->response_guard($guard)"
Register a guard to be triggered when the response is completely sent and the
socket is closed.  A \*(L"guard\*(R" in this context is some object that will do
something interesting in its \s-1DESTROY/DEMOLISH\s0 method. For example, Guard.
.SH "AUTHOR"
.IX Header "AUTHOR"
Jeremy Stashewsky, \f(CW\*(C`stash@cpan.org\*(C'\fR
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
Copyright (C) 2010 by Jeremy Stashewsky & Socialtext Inc.
.PP
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.7 or,
at your option, any later version of Perl 5 you may have available.