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machines.js
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machines.js
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(function() {
"use strict";
var $ = require("jquery");
var cockpit = require("cockpit");
var mod = { };
var known_hosts_path = "/etc/ssh/ssh_known_hosts";
/*
* We share the Machines state between multiple frames. Only
* one frame has the job of loading the state, usually index.js
* The Loader code below does all the loading.
*
* The data is stored in sessionStorage in a JSON object, like this
* {
* content: name → info dict from bridge's /machines Machines property
* overlay: extra data to augment and override on top of content
* }
*
* This uses sessionStorage rather than cockpit.sessionStorage
* because we don't ever want to write unprefixed keys.
*/
var key = cockpit.sessionStorage.prefixedKey("v2-machines.json");
var session_prefix = cockpit.sessionStorage.prefixedKey("v1-session-machine");
function generate_session_key(host) {
return session_prefix + "/" + host;
}
function Machines() {
var self = this;
var flat = null;
self.ready = false;
/* parsed machine data */
var machines = { };
/* Data shared between Machines() instances */
var last = {
content: null,
overlay: {
localhost: {
visible: true,
manifests: cockpit.manifests
}
}
};
function storage(ev) {
if (ev.key === key && ev.storageArea === window.sessionStorage)
refresh(JSON.parse(ev.newValue));
}
window.addEventListener("storage", storage);
window.setTimeout(function() {
var value = window.sessionStorage.getItem(key);
if (!self.ready && value)
refresh(JSON.parse(value));
});
var timeout = null;
function sync(machine, values, overlay) {
var desired = $.extend({ }, values || { }, overlay || { });
var prop;
for (prop in desired) {
if (machine[prop] !== desired[prop])
machine[prop] = desired[prop];
}
for (prop in machine) {
if (machine[prop] !== desired[prop])
delete machine[prop];
}
return machine;
}
function refresh(shared, push) {
if (!shared)
return;
var emit_ready = !self.ready;
self.ready = true;
last = shared;
flat = null;
if (push && !timeout) {
timeout = window.setTimeout(function() {
timeout = null;
window.sessionStorage.setItem(key, JSON.stringify(last));
}, 10);
}
var host, hosts = { };
var content = shared.content || { };
var overlay = shared.overlay || { };
for (host in content)
hosts[host] = true;
for (host in overlay)
hosts[host] = true;
var events = [];
var machine, application;
for (host in hosts) {
var old_machine = machines[host] || { };
var old_conns = old_machine.connection_string;
/* Invert logic for color, always respect what's on disk */
if (content[host] && content[host].color && overlay[host])
delete overlay[host].color;
machine = sync(old_machine, content[host], overlay[host]);
/* Fill in defaults */
machine.key = host;
if (!machine.address)
machine.address = host;
machine.connection_string = self.generate_connection_string(machine.user,
machine.port,
machine.address);
if (!machine.label) {
if (host == "localhost" || host == "localhost.localdomain") {
application = cockpit.transport.application();
if (application.indexOf('cockpit+=') === 0)
machine.label = application.replace('cockpit+=', '');
else
machine.label = window.location.hostname;
} else {
machine.label = host;
}
}
if (!machine.avatar)
machine.avatar = "../shell/images/server-small.png";
events.push([host in machines ? "updated" : "added",
[machine, host, old_conns]]);
machines[host] = machine;
}
/* Remove any lost hosts */
for (host in machines) {
if (!(host in hosts)) {
machine = machines[host];
delete machines[host];
delete overlay[host];
events.push(["removed", [machine, host]]);
}
}
/* Fire off all events */
var i, sel = $(self), len = events.length;
for (i = 0; i < len; i++)
sel.triggerHandler(events[i][0], events[i][1]);
if (emit_ready)
$(self).triggerHandler("ready");
}
function update_session_machine(machine, host, values) {
/* We don't save the whole machine object */
var skey = generate_session_key(host);
var data = $.extend({}, machine, values);
window.sessionStorage.setItem(skey, JSON.stringify(data));
self.overlay(host, values);
return cockpit.when([]);
}
function update_saved_machine(host, values) {
// wrap values in variants for D-Bus call
var values_variant = {};
for (var prop in values)
if (values[prop] !== null)
values_variant[prop] = cockpit.variant(prop == "visible" ? 'b' : 's', values[prop]);
// FIXME: investigate re-using the proxy from Loader (runs in different frame/scope)
var bridge = cockpit.dbus(null, { bus: "internal", "superuser": "try" });
var mod = bridge.call("/machines", "cockpit.Machines", "Update", [ "99-webui.json", host, values_variant ])
.done(function() {
var prop, over = { };
for (prop in values)
over[prop] = null;
self.overlay(host, over);
})
.fail(function(error) {
console.error("failed to call cockpit.Machines.Update(): ", error);
});
return mod;
}
self.add_key = function(host_key) {
var known_hosts = cockpit.file(known_hosts_path, { superuser: "try" });
return known_hosts
.modify(function(data) {
if (!data)
data = "";
return data + "\n" + host_key;
})
.always(function() {
known_hosts.close();
});
};
self.add = function add(connection_string, color) {
var values = self.split_connection_string(connection_string);
var host = values['address'];
values = $.extend({
visible: true,
color: color || self.unused_color(),
}, values);
var machine = self.lookup(host);
if (machine)
machine.on_disk = true;
return self.change(values['address'], values);
};
self.unused_color = function unused_color() {
var i, len = mod.colors.length;
for (i = 0; i < len; i++) {
if (!color_in_use(mod.colors[i]))
return mod.colors[i];
}
return "gray";
};
function color_in_use(color) {
var key, machine, norm = mod.colors.parse(color);
for (key in machines) {
machine = machines[key];
if (machine.color && mod.colors.parse(machine.color) == norm)
return true;
}
return false;
}
function merge(item, values) {
for (var prop in values) {
if (values[prop] === null)
delete item[prop];
else
item[prop] = values[prop];
}
}
self.change = function change(host, values) {
var mod, hostnamed, call;
var machine = self.lookup(host);
if (values.label) {
var conn_to = host;
if (machine)
conn_to = machine.connection_string;
if (!machine || machine.label !== values.label) {
hostnamed = cockpit.dbus("org.freedesktop.hostname1", { host: conn_to });
call = hostnamed.call("/org/freedesktop/hostname1", "org.freedesktop.hostname1",
"SetPrettyHostname", [ values.label, true ])
.always(function() {
hostnamed.close();
})
.fail(function(ex) {
console.warn("couldn't set pretty host name: " + ex);
});
}
}
if (machine && !machine.on_disk)
mod = update_session_machine(machine, host, values);
else
mod = update_saved_machine(host, values);
if (call)
return cockpit.all(call, mod);
return mod;
};
self.data = function data(content) {
var host, changes = {};
for (host in content) {
changes[host] = $.extend({ }, last.overlay[host] || { });
merge(changes[host], { on_disk: true });
}
/* It's a full reload, so data not
* present is no longer from disk
*/
for (host in machines) {
if (content && !content[host]) {
changes[host] = $.extend({ }, last.overlay[host] || { });
merge(changes[host], { on_disk: null });
}
}
refresh({ content: content,
overlay: $.extend({ }, last.overlay, changes) }, true);
};
self.overlay = function overlay(host, values) {
var changes = { };
changes[host] = $.extend({ }, last.overlay[host] || { });
merge(changes[host], values);
refresh({
content: last.content,
overlay: $.extend({ }, last.overlay, changes)
}, true);
};
Object.defineProperty(self, "list", {
enumerable: true,
get: function get() {
var key;
if (!flat) {
flat = [];
for (key in machines) {
if (machines[key].visible)
flat.push(machines[key]);
}
flat.sort(function(m1, m2) {
return m1.label.localeCompare(m2.label);
});
}
return flat;
}
});
Object.defineProperty(self, "addresses", {
enumerable: true,
get: function get() {
return Object.keys(machines);
}
});
self.lookup = function lookup(address) {
var parts = self.split_connection_string(address);
return machines[parts.address || "localhost"] || null;
};
self.generate_connection_string = function (user, port, addr) {
var address = addr;
if (user)
address = user + "@" + address;
if (port)
address = address + ":" + port;
return address;
};
self.split_connection_string = function(conn_to) {
var parts = {};
var user_spot = -1;
var port_spot = -1;
if (conn_to) {
user_spot = conn_to.lastIndexOf('@');
port_spot = conn_to.lastIndexOf(':');
}
if (user_spot > 0) {
parts.user = conn_to.substring(0, user_spot);
conn_to = conn_to.substring(user_spot+1);
port_spot = conn_to.lastIndexOf(':');
}
if (port_spot > -1) {
var port = parseInt(conn_to.substring(port_spot+1), 10);
if (!isNaN(port)) {
parts.port = port;
conn_to = conn_to.substring(0, port_spot);
}
}
parts.address = conn_to;
return parts;
};
self.close = function close() {
window.removeEventListener("storage", storage);
};
}
function Loader(machines, session_only) {
var self = this;
/* Have we loaded from cockpit session */
var session_loaded = false;
/* File we are watching */
var file;
/* echo channels to each machine */
var channels = { };
/* hostnamed proxies to each machine, if hostnamed available */
var proxies = { };
function process_session_key(key, value) {
var host, values, machine;
var parts = key.split("/");
if (parts[0] == session_prefix &&
parts.length === 2) {
host = parts[1];
if (value) {
values = JSON.parse(value);
machine = machines.lookup(host);
if (!machine || !machine.on_disk)
machines.overlay(host, values);
else if (!machine.visible)
machines.change(host, { visible: true });
self.connect(host);
}
}
}
function load_from_session_storage() {
var i;
session_loaded = true;
for (i = 0; i < window.sessionStorage.length; i++) {
var k = window.sessionStorage.key(i);
process_session_key(k, window.sessionStorage.getItem(k));
}
}
function process_session_machines(ev) {
if (ev.storageArea === window.sessionStorage)
process_session_key(ev.key || "", ev.newValue);
}
window.addEventListener("storage", process_session_machines);
function state(host, value, problem) {
var values = { state: value, problem: problem };
if (value == "connected") {
values.restarting = false;
} else if (problem) {
values.manifests = null;
values.checksum = null;
}
machines.overlay(host, values);
}
$(machines).on("added", updated);
$(machines).on("updated", updated);
$(machines).on("removed", removed);
function updated(ev, machine, host, old_conns) {
if (!machine) {
machine = machines.lookup(host);
if (!machine)
return;
}
var props = proxies[host];
if (!props || !props.valid)
props = { };
var overlay = { };
if (!machine.color)
overlay.color = machines.unused_color();
var label = props.PrettyHostname || props.StaticHostname;
if (label && label !== machine.label)
overlay.label = label;
var os = props.OperatingSystemPrettyName;
if (os && os != machine.os)
overlay.os = props.OperatingSystemPrettyName;
if (!$.isEmptyObject(overlay))
machines.overlay(host, overlay);
/* Don't automatically reconnect failed machines */
if (machine.visible) {
if (old_conns && machine.connection_string != old_conns) {
cockpit.kill(old_conns);
self.disconnect(host);
self.connect(host);
} else if (!machine.problem) {
self.connect(host);
}
} else {
self.disconnect(host);
}
}
function removed(ev, machine, host) {
self.disconnect(host);
}
self.connect = function connect(host) {
var machine = machines.lookup(host);
if (!machine)
return;
var channel = channels[host];
if (channel)
return;
var options = {
host: machine.connection_string,
payload: "echo"
};
if (!machine.on_disk && machine.host_key) {
options['temp-session'] = false; /* Compatibility option */
options['session'] = 'shared';
options['host-key'] = machine.host_key;
}
channel = cockpit.channel(options);
channels[host] = channel;
var local = host === "localhost";
/* Request is null, and message is true when connected */
var request = null;
var open = local;
var problem = null;
var url;
if (!machine.manifests) {
if (machine.checksum)
url = "../../" + machine.checksum + "/manifests.json";
else
url = "../../@" + encodeURI(machine.connection_string) + "/manifests.json";
}
function whirl() {
if (!request && open)
state(host, "connected", null);
else if (!problem)
state(host, "connecting", null);
}
/* Here we load the machine manifests, and expect them before going to "connected" */
function request_manifest() {
request = $.ajax({ url: url, dataType: "json", cache: true})
.done(function(manifests) {
var overlay = { manifests: manifests };
var etag = request.getResponseHeader("ETag");
if (etag) /* and remove quotes */
overlay.checksum = etag.replace(/^"(.+)"$/, '$1');
machines.overlay(host, overlay);
})
.fail(function(ex) {
console.warn("failed to load manifests from " + machine.connection_string + ": " + ex);
})
.always(function() {
request = null;
whirl();
});
}
function request_hostname() {
if (!machine.static_hostname) {
var proxy = cockpit.dbus("org.freedesktop.hostname1",
{ host: machine.connection_string }).proxy();
proxies[host] = proxy;
proxy.wait(function() {
$(proxy).on("changed", function() {
updated(null, null, host);
});
updated(null, null, host);
});
}
}
/* Send a message to the server and get back a message once connected */
if (!local) {
channel.send("x");
$(channel)
.on("message", function() {
open = true;
if (url)
request_manifest();
request_hostname();
whirl();
})
.on("close", function(ev, options) {
problem = options.problem || "disconnected";
open = false;
state(host, "failed", problem);
var m = machines.lookup(host);
if (m && m.restarting) {
window.setTimeout(function() {
self.connect(host);
}, 10000);
}
self.disconnect(host);
});
} else if (url) {
request_manifest();
request_hostname();
}
/* In case already ready, for example when local */
whirl();
};
self.disconnect = function disconnect(host) {
if (host === "localhost")
return;
var channel = channels[host];
delete channels[host];
if (channel) {
channel.close();
$(channel).off();
}
var proxy = proxies[host];
delete proxies[host];
if (proxy) {
proxy.client.close();
$(proxy).off();
}
};
self.expect_restart = function expect_restart(host) {
var parts = machines.split_connection_string(host);
machines.overlay(parts.address, { restarting: true,
problem: null });
};
self.close = function close() {
$(machines).off("added", updated);
$(machines).off("changed", updated);
$(machines).off("removed", removed);
machines = null;
if (file)
file.close();
file = null;
window.removeEventListener("storage", process_session_machines);
var hosts = Object.keys(channels);
hosts.forEach(self.disconnect);
};
if (!session_only) {
var proxy = cockpit.dbus(null, { bus: "internal" }).proxy("cockpit.Machines", "/machines");
$(proxy).on("changed", function(data) {
// unwrap variants from D-Bus call
var wrapped = proxy.Machines;
var data_unwrap = {};
var host_props;
for (var host in wrapped) {
host_props = {};
for (var prop in wrapped[host])
host_props[prop] = wrapped[host][prop].v;
data_unwrap[host] = host_props;
}
machines.data(data_unwrap);
if (!session_loaded)
load_from_session_storage();
});
} else {
load_from_session_storage();
machines.data({});
}
}
mod.instance = function instance(loader) {
return new Machines();
};
mod.loader = function loader(machines, session_only) {
return new Loader(machines, session_only);
};
mod.colors = [
"#0099d3",
"#67d300",
"#d39e00",
"#d3007c",
"#00d39f",
"#00d1d3",
"#00618a",
"#4c8a00",
"#8a6600",
"#9b005b",
"#008a55",
"#008a8a",
"#00b9ff",
"#7dff00",
"#ffbe00",
"#ff0096",
"#00ffc0",
"#00fdff",
"#023448",
"#264802",
"#483602",
"#590034",
"#024830",
"#024848"
];
mod.colors.parse = function parse_color(input) {
var div = document.createElement('div');
div.style.color = input;
var style = window.getComputedStyle(div, null);
return style.getPropertyValue("color") || div.style.color;
};
mod.known_hosts_path = known_hosts_path;
cockpit.transport.wait(function() {
var caps = cockpit.transport.options.capabilities || [];
/* If cockpit-ws is handling ssh, check for each capability. Otherwise
* the version is new enough that is has them all */
if ($.inArray("ssh", caps) > -1) {
mod.allow_connection_string = $.inArray("connection-string", caps) != -1;
mod.has_auth_results = $.inArray("auth-method-results", caps) != -1;
known_hosts_path = "/var/lib/cockpit/known_hosts";
mod.known_hosts_path = known_hosts_path;
console.debug("Running against legacy ws with ssh, using legacy file", known_hosts_path);
} else {
mod.allow_connection_string = true;
mod.has_auth_results = true;
}
});
module.exports = mod;
}());