? my $ctx = $main::context;
? $_mt->wrapper_file("wrapper.mt", "Configure", "File Directives")->(sub {

<p>
This document describes the configuration directives of the file handler - a handler that for serving static files.
</p>
<p>
Two directives: <a href="configure/file_directives.html#file.dir"><code>file.dir</code></a> and <a href="configure/file_directives.html#file.file"><code>file.file</code></a> are used to define the mapping.
Other directives modify the behavior of the mappings defined by the two.
</p>

? $ctx->{directive_list}->()->(sub {

<?
$ctx->{directive}->(
    name    => "file.custom-handler",
    levels  => [ qw(global host path) ],
    desc    => q{The directive maps extensions to a custom handler (e.g. FastCGI).},
)->(sub {
?>
<p>
The directive accepts a mapping containing configuration directives that can be used at the <code>extension</code> level, together with a property named <code>extension</code> specifying a extension (starting with <code>.</code>) or a sequence of extensions to which the directives should be applied.
If all the files (including those without extensions) shall be mapped, this property must be set to <code>default</code>. 
Only one handler must exist within the directives.
</p>
<?= $ctx->{example}->('Mapping PHP files to FastCGI', <<'EOT')
file.custom-handler:
  extension: .php
  fastcgi.connect:
    port: /tmp/fcgi.sock
    type: unix

EOT
?>
? })

<?
$ctx->{directive}->(
    name    => "file.dir",
    levels  => [ qw(path) ],
    desc    => q{The directive specifies the directory under which should be served for the corresponding path.},
    see_also => render_mt(<<EOT),
<a href="configure/file_directives.html#file.dirlisting"><code>file.dirlisting</code></a>,
<a href="configure/file_directives.html#file.file"><code>file.file</code></a>,
<a href="configure/file_directives.html#file.index"><code>file.index</code></a>
EOT
)->(sub {
?>
<?= $ctx->{example}->('Serving files under different paths', <<'EOT')
paths:
    "/":
        file.dir: /path/to/doc-root
    "/icons":
        file.dir: /path/to/icons-dir
EOT
?>
? })

<?
$ctx->{directive}->(
    name    => "file.dirlisting",
    levels  => [ qw(global host path) ],
    default => 'file.dirlisting: OFF',
    desc    => <<'EOT',
A boolean flag (<code>OFF</code>, or <code>ON</code>) specifying whether or not to send the directory listing in case none of the index files exist.
EOT
    see_also => render_mt(<<EOT),
<a href="configure/file_directives.html#file.dir"><code>file.dir</code></a>
EOT
)->(sub {});

$ctx->{directive}->(
    name    => "file.etag",
    levels  => [ qw(global host path) ],
    default => 'file.etag: ON',
    desc    => <<'EOT',
A boolean flag (<code>OFF</code>, or <code>ON</code>) specifying whether or not to send etags.
EOT
)->(sub {});
?>

<?
$ctx->{directive}->(
    name     => "file.file",
    levels   => [ qw(path) ],
    desc     => q{The directive maps a path to a specific file.},
    see_also => render_mt(<<EOT),
<a href="configure/file_directives.html#file.dir"><code>file.dir</code></a>
EOT
    since    => '2.0',
)->(sub {
?>
<?= $ctx->{example}->('Mapping a path to a specific file', <<'EOT')
paths:
  /robots.txt:
    file.file: /path/to/robots.txt
EOT
?>
? })

<?
$ctx->{directive}->(
    name    => "file.index",
    levels  => [ qw(global host path) ],
    default => "file.index: [ 'index.html', 'index.htm', 'index.txt' ]",
    desc    => q{Specifies the names of the files that should be served when the client sends a request against the directory.},
    see_also => render_mt(<<EOT),
<a href="configure/file_directives.html#file.dir"><code>file.dir</code></a>
EOT
)->(sub {
?>
<p>
The sequence of filenames are searched from left to right, and the first file that existed is sent to the client.
</p>
? })

<?
$ctx->{directive}->(
    name         => "file.io_uring",
    levels       => [ qw(global host path) ],
    default      => "file.io_uring: OFF",
    desc         => q{If io_uring should be used for serving files.},
    experimental => 1,
    see_also     => render_mt(<<'EOT'),
<a href="configure/base_directives.html#io_uring-batch-size"><code>io_uring-batch-size</code></a>,
<a href="configure/base_directives.html#max-spare-pipes"><code>max-spare-pipes</code></a>
EOT
)->(sub {
?>
<p>
By default, H2O uses system calls such as pread (2) or sendfile (2), which block if the file being read is not in the page cache.
This can prevent H2O's worker threads from making progress on any connection handled by the affected thread.
When this flag is enabled, H2O is no longer blocked by the I/O calls, as the data is asynchronously copied from disk to the page cache before h2o attempts to access it.
</p>
? })

<?
$ctx->{directive}->(
    name     => "file.mime.addtypes",
    levels   => [ qw(global host path) ],
    see_also => render_mt(<<'EOT'),
<a href="configure/compress_directives.html#compress"><code>compress</code></a>,
<a href="configure/http2_directives.html#http2-casper"><code>http2-casper</code></a>,
<a href="configure/http2_directives.html#http2-reprioritize-blocking-assets"><code>http2-reprioritize-blocking-assets</code></a>
EOT
    desc     => q{The directive modifies the MIME mappings by adding the specified MIME type mappings.},
)->(sub {
?>
<?= $ctx->{example}->('Adding MIME mappings', <<'EOT')
file.mime.addtypes:
    "application/javascript": ".js"
    "image/jpeg": [ ".jpg", ".jpeg" ]
EOT
?>
<p>
The default mappings is hard-coded in <a href="https://github.com/h2o/h2o/blob/master/lib/handler/mimemap/defaults.c.h">lib/handler/mimemap/defaults.c.h</a>.
</p>
<p>
It is also possible to set certain attributes for a MIME type.
The example below maps <code>.css</code> files to <code>text/css</code> type, setting <code>is_compressible</code> flag to <code>ON</code> and <code>priority</code> to highest.
</p>

<?= $ctx->{example}->('Setting MIME attributes', <<'EOT')
file.mime.settypes:
    "text/css":
         extensions: [".css"]
         is_compressible: yes
         priority: highest
EOT
?>

<p>
Following attributes are recognized.
</p>

<table>
<tr><th>Attribute<th>Possible Values<th>Description
<tr><td><code>is_compressible</code><td><code>ON</code>, <code>OFF</code><td>if content is compressible
<tr><td><code>priority</code><td><code>highest<code>, <code>normal</code><td>send priority of the content
</table>

<p>
The <code>priority</code> attribute affects how the HTTP/2 protocol implementation handles the request.
For detail, please refer to the HTTP/2 directives listed in the <i>see also</i> section below.
By default, mime-types for CSS and JavaScript files are the only ones that are given <code>highest</code> priority.
</p>

? })

<?
$ctx->{directive}->(
    name    => "file.mime.removetypes",
    levels  => [ qw(global host path) ],
    desc    => q{Removes the MIME mappings for specified extensions supplied as a sequence of extensions.},
)->(sub {
?>
<?= $ctx->{example}->('Removing MIME mappings', <<'EOT')
file.mime.removetypes: [ ".jpg", ".jpeg" ]
EOT
?>
? })

<?
$ctx->{directive}->(
    name    => "file.mime.setdefaulttype",
    levels  => [ qw(global host path) ],
    default => q{file.mime.setdefaulttype: "application/octet-stream"},
    desc    => q{Sets the default MIME-type that is used when an extension does not exist in the MIME mappings},
)->(sub {})
?>

<?
$ctx->{directive}->(
    name    => "file.mime.settypes",
    levels  => [ qw(global host path) ],
    desc    => q{Resets the MIME mappings to given mapping.},
)->(sub {
?>
<?= $ctx->{example}->('Resetting the MIME mappings to minimum', <<'EOT')
file.mime.settypes:
    "text/html":  [ ".html", ".htm" ]
    "text/plain": ".txt"
EOT
?>
? })

<?
$ctx->{directive}->(
    name     => "file.send-compressed",
    levels   => [ qw(global host path) ],
    default  => q{file.send-compressed: OFF},
    see_also => render_mt(<<'EOT'),
<a href="configure/compress_directives.html#compress"><code>compress</code></a>
EOT
    since   => '2.0',
    desc    => <<'EOT',
A flag indicating how a pre-compressed file should be served.
EOT
)->(sub {
?>
<p>
If set to <code>ON</code>, the handler looks for a file with <code>.br</code>, <code>.zst</code>, or <code>.gz</code> appended and sends the file, if the client is capable of transparently decoding a <a href="https://www.rfc-editor.org/rfc/rfc7932.html" target=_blank>brotli</a>, <a href="https://www.rfc-editor.org/rfc/rfc8878.html" target=_blank>zstd</a>, or <a href="https://tools.ietf.org/html/rfc1952" target=_blank>gzip</a>-encoded response.
For example, if a client requests a file named <code>index.html</code> with <code>Accept-Encoding: gzip</code> header and if <code>index.html.gz</code> exists, the <code>.gz</code> file is sent as a response together with a <code>Content-Encoding: gzip</code> response header.
When both the client and the server support multiple content encodings, the encoding chosen is the first one listed in the following order: brotli, zstd, gzip.
</p>
<p>
If set to <code>OFF</code>, the handler always serves the file specified by the client.
</p>
<p>
Starting from version 2.2, <code>gunzip</code> is also supported.
If set, the handler acts identical to when the value was set to <code>ON</code>.
In addition, the handler will send an uncompressed response by dynamically decompressing the <code>.gz</code> file if the client and the server failed to agree on using a pre-compressed file as the response and if a non-compressed file was not found.
The option is useful when conserving disk space is important; it is possible to remove the uncompressed files in place for gzipped ones.
</p>
? })

<?
$ctx->{directive}->(
    name     => "file.send-gzip",
    levels   => [ qw(global host path) ],
    desc     => <<'EOT',
Obsoleted in 2.0.
Synonym of <a href="configure/file_directives.html#file.send-compressed"><code>file.send-compressed</code></a>.
EOT
)->(sub {})
?>

? })

? })
