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+<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+ This file is part of systemd.
+
+ Copyright 2012 Zbigniew Jędrzejewski-Szmek
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="systemd-journal-gatewayd.service" conditional='HAVE_MICROHTTPD'
+ xmlns:xi="http://www.w3.org/2001/XInclude">
+
+ <refentryinfo>
+ <title>systemd-journal-gatewayd.service</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>Developer</contrib>
+ <firstname>Zbigniew</firstname>
+ <surname>Jędrzejewski-Szmek</surname>
+ <email>zbyszek@in.waw.pl</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>systemd-journal-gatewayd.service</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>systemd-journal-gatewayd.service</refname>
+ <refname>systemd-journal-gatewayd.socket</refname>
+ <refname>systemd-journal-gatewayd</refname>
+ <refpurpose>HTTP server for journal events</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <para><filename>systemd-journal-gatewayd.service</filename></para>
+ <para><filename>systemd-journal-gatewayd.socket</filename></para>
+ <cmdsynopsis>
+ <command>/usr/lib/systemd/systemd-journal-gatewayd</command>
+ <arg choice="opt" rep="repeat">OPTIONS</arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><command>systemd-journal-gatewayd</command> serves journal
+ events over the network. Clients must connect using
+ HTTP. The server listens on port 19531 by default.
+ If <option>--cert=</option> is specified, the server expects
+ HTTPS connections.</para>
+
+ <para>The program is started by
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ and expects to receive a single socket. Use
+ <command>systemctl start systemd-journal-gatewayd.socket</command> to start
+ the service, and <command>systemctl enable systemd-journal-gatewayd.socket</command>
+ to have it started on boot.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>The following options are understood:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><option>--cert=</option></term>
+
+ <listitem><para>Specify the path to a file containing a server
+ certificate in PEM format. This option switches
+ <command>systemd-journal-gatewayd</command> into HTTPS mode
+ and must be used together with
+ <option>--key=</option>.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--key=</option></term>
+
+ <listitem><para>Specify the path to a file containing a server
+ key in PEM format corresponding to the certificate specified
+ with <option>--cert=</option>.</para></listitem>
+ </varlistentry>
+
+ <xi:include href="standard-options.xml" xpointer="help" />
+ <xi:include href="standard-options.xml" xpointer="version" />
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Supported URLs</title>
+
+ <para>The following URLs are recognized:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><uri>/browse</uri></term>
+
+ <listitem><para>Interactive browsing.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><uri>/entries[?option1&amp;option2=value...]</uri></term>
+
+ <listitem><para>Retrieval of events in various formats.</para>
+
+ <para>The <option>Accept:</option> part of the HTTP header
+ determines the format. Supported values are described below.
+ </para>
+
+ <para>The <option>Range:</option> part of the HTTP header
+ determines the range of events returned. Supported values are
+ described below.
+ </para>
+
+ <para>GET parameters can be used to modify what events are
+ returned. Supported parameters are described below.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><uri>/machine</uri></term>
+
+ <listitem><para>Return a JSON structure describing the machine.</para>
+
+ <para>Example:
+ <programlisting>{ "machine_id" : "8cf7ed9d451ea194b77a9f118f3dc446",
+ "boot_id" : "3d3c9efaf556496a9b04259ee35df7f7",
+ "hostname" : "fedora",
+ "os_pretty_name" : "Fedora 19 (Rawhide)",
+ "virtualization" : "kvm",
+ ...}</programlisting>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><uri>/fields/<replaceable>FIELD_NAME</replaceable></uri></term>
+
+ <listitem><para>Return a list of values of this field present in the logs.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Accept header</title>
+
+ <para>
+ <option>Accept: <replaceable>format</replaceable></option>
+ </para>
+
+ <para>Recognized formats:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><constant>text/plain</constant></term>
+
+ <listitem><para>The default. Plaintext syslog-like output,
+ one line per journal entry
+ (like <command>journalctl --output short</command>).</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>application/json</constant></term>
+
+ <listitem><para>Entries are formatted as JSON data structures,
+ one per line
+ (like <command>journalctl --output json</command>).
+ See <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/json">Journal
+ JSON Format</ulink> for more information.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>text/event-stream</constant></term>
+
+ <listitem><para>Entries are formatted as JSON data structures,
+ wrapped in a format suitable for <ulink
+ url="https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events">
+ Server-Sent Events</ulink>
+ (like <command>journalctl --output json-sse</command>).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><constant>application/vnd.fdo.journal</constant></term>
+
+ <listitem><para>Entries are serialized into a binary (but
+ mostly text-based) stream suitable for backups and network
+ transfer
+ (like <command>journalctl --output export</command>).
+ See <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
+ Export Format</ulink> for more information.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Range header</title>
+
+ <para>
+ <option>Range: entries=<replaceable>cursor</replaceable>[[:<replaceable>num_skip</replaceable>]:<replaceable>num_entries</replaceable>]</option>
+ </para>
+
+ <para>where
+ <option>cursor</option> is a cursor string,
+ <option>num_skip</option> is an integer,
+ <option>num_entries</option> is an unsigned integer.
+ </para>
+
+ <para>Range defaults to all available events.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>URL GET parameters</title>
+
+ <para>Following parameters can be used as part of the URL:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><uri>follow</uri></term>
+
+ <listitem><para>wait for new events
+ (like <command>journalctl --follow</command>, except that
+ the number of events returned is not limited).</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><uri>discrete</uri></term>
+
+ <listitem><para>Test that the specified cursor refers to an
+ entry in the journal. Returns just this entry.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><uri>boot</uri></term>
+
+ <listitem><para>Limit events to the current boot of the system
+ (like <command>journalctl --this-boot</command>).</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><uri><replaceable>KEY</replaceable>=<replaceable>match</replaceable></uri></term>
+
+ <listitem><para>Match journal fields. See
+ <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Examples</title>
+ <para>Retrieve events from this boot from local journal
+ in <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/export">Journal
+ Export Format</ulink>:
+ <programlisting>curl --silent -H'Accept: application/vnd.fdo.journal' \
+ 'http://localhost:19531/entries?boot'</programlisting>
+ </para>
+
+ <para>Listen for core dumps:
+ <programlisting>curl 'http://localhost:19531/entries?follow&amp;MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1'</programlisting></para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ </para>
+ </refsect1>
+
+</refentry>