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mod_measure_modules: Report module statuses via OpenMetrics Someone in the chat asked about a health check endpoint, which reminded me of mod_http_status, which provides access to module statuses with full details. After that, this idea came about, which seems natural. As noted in the README, it could be used to monitor that critical modules are in fact loaded correctly. As more modules use the status API, the more useful this module and mod_http_status becomes.
author Kim Alvefur <zash@zash.se>
date Fri, 06 Oct 2023 18:34:39 +0200
parents 1630c6ed3814
children
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var BOSH_SERVICE = '/http-bind/';
var show_log = false;

Strophe.addNamespace('C2SSTREAM', 'http://prosody.im/streams/c2s');
Strophe.addNamespace('S2SSTREAM', 'http://prosody.im/streams/s2s');
Strophe.addNamespace('ADMINSUB', 'http://prosody.im/adminsub');
Strophe.addNamespace('CAPS', 'http://jabber.org/protocol/caps');

var localJID = null;
var connection   = null;

var adminsubHost = null;
var adhocControl = new Adhoc('#adhocDisplay', function() {});

function log(msg) {
    var entry = $('<div></div>').append(document.createTextNode(msg));
    $('#log').append(entry);
}

function rawInput(data) {
    log('RECV: ' + data);
}

function rawOutput(data) {
    log('SENT: ' + data);
}

function _cbNewS2S(e) {
    var items, item, entry, tmp, retract, id, jid, infos, info, metadata;
    items = e.getElementsByTagName('item');
    for (i = 0; i < items.length; i++) {
        item = items[i];
        id = item.attributes.getNamedItem('id').value;
        jid = item.getElementsByTagName('session')[0].attributes.getNamedItem('jid').value;
        infos = item.getElementsByTagName('info');

        entry = $('<li id="' + id + '">' + jid + '</li>');
        if (tmp = item.getElementsByTagName('encrypted')[0]) {
            if (tmp.getElementsByTagName('valid')[0]) {
                entry.append('<img src="images/secure.png" title="encrypted (certificate valid)" alt=" (secure) (encrypted)" />');
            } else {
                entry.append('<img src="images/encrypted.png" title="encrypted (certificate invalid)" alt=" (encrypted)" />');
            }
        }
        if (item.getElementsByTagName('compressed')[0]) {
            entry.append('<img src="images/compressed.png" title="compressed" alt=" (compressed)" />');
        }
        metadata = $('<ul/>').css('display', 'none');
        entry.on('click', function() {
            $(this).find("ul").slideToggle();
        });
        metadata.appendTo(entry);
        for (j = 0; j < infos.length; j++) {
            info = infos[j];
            metadata.append('<li><b>' + info.attributes.getNamedItem('name').value + ':</b> ' + info.textContent + '</li>');
        }
        if (infos.length == 0)
            metadata.append('<li>No information available</li>');

        if (items[i].getElementsByTagName('out')[0]) {
            entry.appendTo('#s2sout');
        } else {
            entry.appendTo('#s2sin');
        }
    }
    retract = e.getElementsByTagName('retract')[0];
    if (retract) {
        id = retract.attributes.getNamedItem('id').value;
        $('#' + id).remove();
    }
    return true;
}

function _cbNewC2S(e) {
    var items, item, entry, retract, id, jid, infos, info, metadata;
    items = e.getElementsByTagName('item');
    for (i = 0; i < items.length; i++) {
        item = items[i];
        id = item.attributes.getNamedItem('id').value;
        jid = item.getElementsByTagName('session')[0].attributes.getNamedItem('jid').value;
        infos = item.getElementsByTagName('info');
        entry = $('<li id="' + id + '">' + jid + '</li>');
        if (item.getElementsByTagName('encrypted')[0]) {
            entry.append('<img src="images/encrypted.png" title="encrypted" alt=" (encrypted)" />');
        }
        if (item.getElementsByTagName('compressed')[0]) {
            entry.append('<img src="images/compressed.png" title="compressed" alt=" (compressed)" />');
        }
        metadata = $('<ul/>').css('display', 'none');
        entry.on('click', function() {
            $(this).find("ul").slideToggle();
        });
        metadata.appendTo(entry);
        for (j = 0; j < infos.length; j++) {
            info = infos[j];
            metadata.append('<li><b>' + info.attributes.getNamedItem('name').value + ':</b> ' + info.textContent + '</li>');
        }
        if (infos.length == 0)
            metadata.append('<li>No information available</li>');
        entry.appendTo('#c2s');
    }
    retract = e.getElementsByTagName('retract')[0];
    if (retract) {
        id = retract.attributes.getNamedItem('id').value;
        $('#' + id).remove();
    }
    return true;
}

function _cbAdminSub(e) {
    var node = e.getElementsByTagName('items')[0].attributes.getNamedItem('node').value;
    if (node == Strophe.NS.C2SSTREAM) {
        _cbNewC2S(e);
    } else if (node == Strophe.NS.S2SSTREAM) {
        _cbNewS2S(e);
    }

    return true;
}

function onConnect(status) {
    if (status == Strophe.Status.CONNECTING) {
        log('Strophe is connecting.');
    } else if (status == Strophe.Status.CONNFAIL) {
        alert('Connection failed (Wrong host?)');
        log('Strophe failed to connect.');
        showConnect();
    } else if (status == Strophe.Status.DISCONNECTING) {
        log('Strophe is disconnecting.');
    } else if (status == Strophe.Status.DISCONNECTED) {
        log('Strophe is disconnected.');
        showConnect();
    } else if (status == Strophe.Status.AUTHFAIL) {
        alert('Wrong username and/or password');
        log('Authentication failed');
        if (connection) {
            connection.disconnect();
        }
    } else if (status == Strophe.Status.CONNECTED) {
        log('Strophe is connected.');
        connection.sendIQ($iq({to: connection.domain, type: 'get', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('adminfor'), function(e) {
                var items;
                var domainpart = Strophe.getDomainFromJid(connection.jid);
                items = e.getElementsByTagName('item');
                if (items.length == 0) {
                    alert("You are not an administrator");
                    connection.disconnect();
                    return false;
                }
                for (i = 0; i < items.length; i++) {
                    var host = $(items[i]).text();
                    $('<option/>').text(host).prop('selected', host == domainpart).appendTo('#host');
                }
                showDisconnect();
                adminsubHost = $('#host').val();
                adhocControl.checkFeatures(adminsubHost,
                    function () { adhocControl.getCommandNodes(function (result) { $('#adhocDisplay').empty(); $('#adhocCommands').html(result); }) },
                    function () { $('#adhocCommands').empty(); $('#adhocDisplay').html('<p>This host does not support commands</p>'); });
                connection.addHandler(_cbAdminSub, Strophe.NS.ADMINSUB + '#event', 'message');
                connection.send($iq({to: adminsubHost, type: 'set', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
                    .c('subscribe', {node: Strophe.NS.C2SSTREAM}));
                connection.send($iq({to: adminsubHost, type: 'set', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
                    .c('subscribe', {node: Strophe.NS.S2SSTREAM}));
                connection.sendIQ($iq({to: adminsubHost, type: 'get', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
                    .c('items', {node: Strophe.NS.S2SSTREAM}), _cbNewS2S);
                connection.sendIQ($iq({to: adminsubHost, type: 'get', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
                    .c('items', {node: Strophe.NS.C2SSTREAM}), _cbNewC2S);
        });
    }
}

function showConnect() {
    $('#login').show();
    $('#menu').hide();
    $('#main').hide();
    $('#s2sin').empty();
    $('#s2sout').empty();
    $('#c2s').empty();
    $('#host').empty();
}

function showDisconnect() {
    $('#s2sList').hide();
    $('#c2sList').hide();
    $('#login').hide();

    $('#menu').show();
    $('#main').show();
    $('#adhoc').show();
}

$(document).ready(function () {
    connection = new Strophe.Connection(BOSH_SERVICE);
    if (show_log) {
        $('#log_container').show();
        connection.rawInput = rawInput;
        connection.rawOutput = rawOutput;
    }

    $("#log_toggle").click(function () {
        $("#log").toggle();
    });

    $('#cred').on('submit', function (event) {
        var button = $('#connect').get(0);
        var jid = $('#jid');
        var pass = $('#pass');
        localJID = jid.get(0).value;

        $('#log').empty();
        connection.connect(localJID, pass.get(0).value, onConnect);
        event.preventDefault();
    });

    $('#logout').click(function (event) {
        connection.disconnect();
        event.preventDefault();
    });

    $('#adhocMenu, #serverMenu, #clientMenu').click(function (event) {
        event.preventDefault();
        var tab = $(this).attr('href');
        $('#main > div').hide();
        $(tab).fadeIn('fast');
    });

    $('#host').on('change', function (event) {
        connection.send($iq({to: adminsubHost, type: 'set', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('unsubscribe', {node: Strophe.NS.C2SSTREAM}));
        connection.send($iq({to: adminsubHost, type: 'set', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('unsubscribe', {node: Strophe.NS.S2SSTREAM}));
        adminsubHost = $(this).val();
        adhocControl.checkFeatures(adminsubHost,
            function () { adhocControl.getCommandNodes(function (result) { $('#adhocDisplay').empty(); $('#adhocCommands').html(result); }) },
            function () { $('#adhocCommands').empty(); $('#adhocDisplay').html('<p>This host does not support commands</p>'); });
        $('#s2sin').empty();
        $('#s2sout').empty();
        $('#c2s').empty();
        connection.send($iq({to: adminsubHost, type: 'set', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('subscribe', {node: Strophe.NS.C2SSTREAM}));
        connection.send($iq({to: adminsubHost, type: 'set', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('subscribe', {node: Strophe.NS.S2SSTREAM}));
        connection.sendIQ($iq({to: adminsubHost, type: 'get', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('items', {node: Strophe.NS.S2SSTREAM}), _cbNewS2S);
        connection.sendIQ($iq({to: adminsubHost, type: 'get', id: connection.getUniqueId()}).c('adminsub', {xmlns: Strophe.NS.ADMINSUB})
            .c('items', {node: Strophe.NS.C2SSTREAM}), _cbNewC2S);
    });
});

window.onunload = window.onbeforeunload = function() {
    if (connection) {
        connection.disconnect();
    }
}