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goldilocks.js
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moved some functions into a utils files for wider use within ddns

This commit is contained in:
tigerbot 2017-11-07 16:42:00 -07:00
parent 57f97eebdb
commit 40bd1d9cc6
3 changed files with 120 additions and 103 deletions
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64
lib/ddns/dns-ctrl.js
View File

@ -1,6 +1,6 @@
'use strict';
module.exports.create = function (deps, conf) {
module.exports.create = function (deps, conf, utils) {
function dnsType(addr) {
if (/^\d+\.\d+\.\d+\.\d+$/.test(addr)) {
return 'A';
@ -10,62 +10,6 @@ module.exports.create = function (deps, conf) {
}
}
var tldCache = {};
async function getTlds(provider) {
async function updateCache() {
var reqObj = {
url: deps.OAUTH3.url.normalize(provider)+'/api/com.daplie.domains/prices'
, method: 'GET'
, json: true
};
var resp = await deps.OAUTH3.request(reqObj);
var tldObj = {};
resp.data.forEach(function (tldInfo) {
if (tldInfo.enabled) {
tldObj[tldInfo.tld] = true;
}
});
tldCache[provider] = {
time: Date.now()
, tlds: tldObj
};
return tldObj;
}
// If we've never cached the results we need to return the promise that will fetch the recult,
// otherwise we can return the cached value. If the cached value has "expired", we can still
// return the cached value we just want to update the cache in parellel (making sure we only
// update once).
if (!tldCache[provider]) {
return updateCache();
}
if (!tldCache[provider].updating && Date.now() - tldCache[provider].time > 24*60*60*1000) {
tldCache[provider].updating = true;
updateCache();
}
return tldCache[provider].tlds;
}
async function splitDomains(provider, domains) {
var tlds = await getTlds(provider);
return domains.map(function (domain) {
var split = domain.split('.');
var tldSegCnt = tlds[split.slice(-2).join('.')] ? 2 : 1;
// Currently assuming that the sld can't contain dots, and that the tld can have at
// most one dot. Not 100% sure this is a valid assumption, but exceptions should be
// rare even if the assumption isn't valid.
return {
tld: split.slice(-tldSegCnt).join('.')
, sld: split.slice(-tldSegCnt-1, -tldSegCnt).join('.')
, sub: split.slice(0, -tldSegCnt-1).join('.')
};
});
}
async function setDeviceAddress(session, addr, domains) {
var directives = await deps.OAUTH3.discover(session.token.aud);
@ -111,7 +55,7 @@ module.exports.create = function (deps, conf) {
return goodAddrDomains.indexOf(domain) < 0;
});
var oldDns = await splitDomains(directives.api, badAddrDomains);
var oldDns = await utils.splitDomains(directives.api, badAddrDomains);
var common = {
api: 'devices.detach'
, session: session
@ -124,7 +68,7 @@ module.exports.create = function (deps, conf) {
console.log('removed bad DNS records for ' + badAddrDomains.join(', '));
}
var newDns = await splitDomains(directives.api, requiredUpdates);
var newDns = await utils.splitDomains(directives.api, requiredUpdates);
common = {
api: 'devices.attach'
, session: session
@ -169,7 +113,7 @@ module.exports.create = function (deps, conf) {
async function removeDomains(session, domains) {
var directives = await deps.OAUTH3.discover(session.token.aud);
var oldDns = await splitDomains(directives.api, domains);
var oldDns = await utils.splitDomains(directives.api, domains);
var common = {
api: 'devices.detach'
, session: session

57
lib/ddns/index.js
View File

@ -3,48 +3,19 @@
module.exports.create = function (deps, conf) {
var dns = deps.PromiseA.promisifyAll(require('dns'));
var network = deps.PromiseA.promisifyAll(deps.recase.camelCopy(require('network')));
var loopback = require('./loopback').create(deps, conf);
var dnsCtrl = require('./dns-ctrl').create(deps, conf);
var tunnelClients = require('./tunnel-client-manager').create(deps, conf);
var equal = require('deep-equal');
var utils = require('./utils').create(deps, conf);
var loopback = require('./loopback').create(deps, conf, utils);
var dnsCtrl = require('./dns-ctrl').create(deps, conf, utils);
var tunnelClients = require('./tunnel-client-manager').create(deps, conf, utils);
var loopbackDomain;
function iterateAllModules(action, curConf) {
curConf = curConf || conf;
var promises = curConf.ddns.modules.map(function (mod) {
return action(mod, mod.domains);
});
curConf.domains.forEach(function (dom) {
if (!dom.modules || !Array.isArray(dom.modules.ddns) || !dom.modules.ddns.length) {
return null;
}
// For the time being all of our things should only be tried once (regardless if it succeeded)
// TODO: revisit this behavior when we support multiple ways of setting records, and/or
// if we want to allow later modules to run if early modules fail.
promises.push(dom.modules.ddns.reduce(function (prom, mod) {
if (prom) { return prom; }
return action(mod, dom.names);
}, null));
});
return deps.PromiseA.all(promises.filter(Boolean));
}
async function getSession(id) {
var session = await deps.storage.tokens.get(id);
if (!session) {
throw new Error('no user token with ID "'+id+'"');
}
return session;
}
var tunnelActive = false;
async function startTunnel(tunnelSession, mod, domainList) {
try {
var dnsSession = await getSession(mod.tokenId);
var dnsSession = await utils.getSession(mod.tokenId);
var tunnelDomain = await tunnelClients.start(tunnelSession || dnsSession, domainList);
var addrList;
@ -74,7 +45,7 @@ module.exports.create = function (deps, conf) {
tunnelSession = await deps.storage.tokens.get(conf.ddns.tunnel.tokenId);
}
await iterateAllModules(function (mod, domainList) {
await utils.iterateAllModules(function (mod, domainList) {
if (mod.type !== 'dns@oauth3.org') { return null; }
return startTunnel(tunnelSession, mod, domainList);
@ -90,7 +61,7 @@ module.exports.create = function (deps, conf) {
async function checkTunnelTokens() {
var oldTokens = tunnelClients.current();
var newTokens = await iterateAllModules(function checkTokens(mod, domainList) {
var newTokens = await utils.iterateAllModules(function checkTokens(mod, domainList) {
if (mod.type !== 'dns@oauth3.org') { return null; }
var domainStr = domainList.slice().sort().join(',');
@ -188,10 +159,10 @@ module.exports.create = function (deps, conf) {
}
publicAddress = addr;
await iterateAllModules(function setModuleDNS(mod, domainList) {
await utils.iterateAllModules(function setModuleDNS(mod, domainList) {
if (mod.type !== 'dns@oauth3.org' || mod.disabled) { return null; }
return getSession(mod.tokenId).then(function (session) {
return utils.getSession(mod.tokenId).then(function (session) {
return dnsCtrl.setDeviceAddress(session, addr, domainList);
}).catch(function (err) {
console.log('error setting DNS records for', domainList.join(', '));
@ -206,13 +177,13 @@ module.exports.create = function (deps, conf) {
// this returns a Promise, but since the functions we use are synchronous
// and change our enclosed variables we don't need to wait for the return.
iterateAllModules(function (mod, domainList) {
utils.iterateAllModules(function (mod, domainList) {
if (mod.type !== 'dns@oauth3.org') { return; }
prevMods[mod.id] = { mod, domainList };
return true;
}, prevConf);
iterateAllModules(function (mod, domainList) {
utils.iterateAllModules(function (mod, domainList) {
if (mod.type !== 'dns@oauth3.org') { return; }
curMods[mod.id] = { mod, domainList };
@ -250,7 +221,7 @@ module.exports.create = function (deps, conf) {
return;
}
return getSession(mod.tokenId).then(function (session) {
return utils.getSession(mod.tokenId).then(function (session) {
return dnsCtrl.removeDomains(session, oldDomains);
});
}).filter(Boolean));
@ -275,7 +246,7 @@ module.exports.create = function (deps, conf) {
return;
}
return getSession(mod.tokenId).then(function (session) {
return utils.getSession(mod.tokenId).then(function (session) {
return dnsCtrl.setDeviceAddress(session, publicAddress, newDomains);
});
}).filter(Boolean));

102
lib/ddns/utils.js Normal file
View File

@ -0,0 +1,102 @@
'use strict';
module.exports.create = function (deps, conf) {
async function getSession(id) {
var session = await deps.storage.tokens.get(id);
if (!session) {
throw new Error('no user token with ID "' + id + '"');
}
return session;
}
function iterateAllModules(action, curConf) {
curConf = curConf || conf;
var promises = [];
curConf.domains.forEach(function (dom) {
if (!dom.modules || !Array.isArray(dom.modules.ddns) || !dom.modules.ddns.length) {
return null;
}
// For the time being all of our things should only be tried once (regardless if it succeeded)
// TODO: revisit this behavior when we support multiple ways of setting records, and/or
// if we want to allow later modules to run if early modules fail.
promises.push(dom.modules.ddns.reduce(function (prom, mod) {
if (prom) { return prom; }
return action(mod, dom.names);
}, null));
});
curConf.ddns.modules.forEach(function (mod) {
promises.push(action(mod, mod.domains));
});
return Promise.all(promises.filter(Boolean));
}
var tldCache = {};
async function updateTldCache(provider) {
var reqObj = {
url: deps.OAUTH3.url.normalize(provider) + '/api/com.daplie.domains/prices'
, method: 'GET'
, json: true
};
var resp = await deps.OAUTH3.request(reqObj);
var tldObj = {};
resp.data.forEach(function (tldInfo) {
if (tldInfo.enabled) {
tldObj[tldInfo.tld] = true;
}
});
tldCache[provider] = {
time: Date.now()
, tlds: tldObj
};
return tldObj;
}
async function getTlds(provider) {
// If we've never cached the results we need to return the promise that will fetch the result,
// otherwise we can return the cached value. If the cached value has "expired", we can still
// return the cached value we just want to update the cache in parellel (making sure we only
// update once).
if (!tldCache[provider]) {
tldCache[provider] = {
updating: true
, tlds: updateTldCache(provider)
};
}
if (!tldCache[provider].updating && Date.now() - tldCache[provider].time > 24 * 60 * 60 * 1000) {
tldCache[provider].updating = true;
updateTldCache(provider);
}
return tldCache[provider].tlds;
}
async function splitDomains(provider, domains) {
var tlds = await getTlds(provider);
return domains.map(function (domain) {
var split = domain.split('.');
var tldSegCnt = tlds[split.slice(-2).join('.')] ? 2 : 1;
// Currently assuming that the sld can't contain dots, and that the tld can have at
// most one dot. Not 100% sure this is a valid assumption, but exceptions should be
// rare even if the assumption isn't valid.
return {
tld: split.slice(-tldSegCnt).join('.')
, sld: split.slice(-tldSegCnt - 1, -tldSegCnt).join('.')
, sub: split.slice(0, -tldSegCnt - 1).join('.')
};
});
}
return {
getSession
, iterateAllModules
, getTlds
, splitDomains
};
};