microfrontier
Version:
A web crawler frontier implementation in TypeScript backed by Redis. MicroFrontier is a scalable and distributed frontier implemented through Redis Queues.
94 lines (93 loc) • 12 kB
JavaScript
;
var nconf = require("nconf");
var _micro = require("micro");
var MR = require("microrouter");
var _urlfrontier = require("./URLFrontier");
var _workerThreads = require("worker_threads");
nconf.env({
parseValues: true,
separator: '_'
}).argv();
const { get , post } = MR;
const frontier = new _urlfrontier.URLFrontier({
config: nconf.get('config') ? nconf.get('config') : null,
redisOptions: nconf.get('redis') ? nconf.get('redis') : {
}
});
var frontendWorkerPool;
/*
* Initialize frontend workers
*/ var frontendWorkers = [];
const FEW = process.env.FRONTEND_WORKERS ? process.env.FRONTEND_WORKERS : 1;
for(var i1 = 0; i1 < FEW; i1++){
const worker = new _workerThreads.Worker(__dirname + '/FrontendWorkerPool.js', {
workerData: {
config: frontier.config,
redisOptions: nconf.get('redis') ? nconf.get('redis') : {
}
}
});
frontendWorkers.push(worker);
}
const postFrontier = async (req, res)=>{
const body = await (0, _micro).json(req);
try {
await frontier.add(body.url, body.priority, body.meta);
(0, _micro).send(res, 200, {
status: 'OK'
});
} catch (e) {
(0, _micro).send(res, 500, {
status: 'ERROR',
error: e
});
}
};
const getFrontier = async (req, res)=>{
try {
const data = await frontier.get();
(0, _micro).send(res, 200, {
status: 'OK',
data
});
} catch (e) {
console.error(e);
(0, _micro).send(res, 500, {
status: 'ERROR',
error: e
});
}
};
const postFrontendWorkers = async (req, res)=>{
const body = await (0, _micro).json(req);
if (frontendWorkers.length > 0 || body.workers === 0) {
for (var wk of frontendWorkers){
await wk.terminate();
}
frontendWorkers = [];
}
for(var i = 0; i < body.workers; i++){
const worker = new _workerThreads.Worker(__dirname + '/FrontendWorkerPool.js', {
workerData: {
config: frontier.config,
redisOptions: nconf.get('redis') ? nconf.get('redis') : {
}
}
});
frontendWorkers.push(worker);
}
(0, _micro).send(res, 200, {
status: 'OK',
activeWorkers: frontendWorkers.length
});
};
const notfound = (req, res)=>(0, _micro).send(res, 404, 'Not found')
;
const server = (0, _micro).default((0, MR).router(post('/frontier', postFrontier), get('/frontier', getFrontier), post('/frontend-workers', postFrontendWorkers), get('/*', notfound)));
const port = nconf.get('port') ? nconf.get('port') : 8090;
const host = nconf.get('host') ? nconf.get('host') : '127.0.0.1';
server.listen(port, host);
server.addListener('listening', ()=>{
console.log(`Server Started on ${host}:${port}`);
});
//# sourceMappingURL=data:application/json;base64,{"version":3,"sources":["../src/MicroServer.ts"],"sourcesContent":["import * as nconf from 'nconf';\nnconf.env({parseValues: true, separator:'_'}).argv();\nimport { send, json } from 'micro'\nimport { router } from 'microrouter'\nimport * as MR from 'microrouter';\nimport { URLFrontier } from './URLFrontier'\nimport micro from 'micro';\nimport { Worker } from 'worker_threads'\n\nconst { get, post } = MR as any;\n\nconst frontier = new URLFrontier({\n    config: nconf.get('config') ? nconf.get('config') : null,\n    redisOptions: nconf.get('redis') ? nconf.get('redis') : {}\n});\nvar frontendWorkerPool\n\n/*\n * Initialize frontend workers\n */\nvar frontendWorkers = []\nconst FEW = process.env.FRONTEND_WORKERS ? process.env.FRONTEND_WORKERS : 1\nfor(var i = 0; i < FEW ; i++){\n    const worker = new Worker(__dirname + '/FrontendWorkerPool.js', {\n        workerData: {\n            config: frontier.config,\n            redisOptions: nconf.get('redis') ? nconf.get('redis') : {}\n        }\n    });\n    frontendWorkers.push(worker);\n}\n\n\nconst postFrontier = async (req, res) => {\n    const body = await json(req)\n    try {\n        await frontier.add(body.url, body.priority, body.meta);\n        send(res, 200, { status: 'OK' })\n    } catch (e) {\n\n        send(res, 500, { status: 'ERROR', error: e })\n    }\n}\n\nconst getFrontier = async (req, res) => {\n    try {\n        const data = await frontier.get()\n        send(res, 200, { status: 'OK', data })\n    } catch (e) {\n        console.error(e)\n        send(res, 500, { status: 'ERROR', error: e })\n    }\n}\n\nconst postFrontendWorkers = async (req, res) => {\n    const body = await json(req)\n\n    if(frontendWorkers.length > 0 || body.workers === 0){\n        for(var wk of frontendWorkers){\n            await wk.terminate();\n        }\n        frontendWorkers = []\n    }\n\n    for(var i = 0; i < body.workers; i++){\n        const worker = new Worker(__dirname + '/FrontendWorkerPool.js', {\n            workerData: {\n                config: frontier.config,\n                redisOptions: nconf.get('redis') ? nconf.get('redis') : {}\n            }\n        });\n        frontendWorkers.push(worker);\n    }\n    \n    send(res, 200, { status: 'OK', activeWorkers: frontendWorkers.length })\n}\n\nconst notfound = (req, res) => send(res, 404, 'Not found')\n\n\nconst server = micro(router(\n    post('/frontier', postFrontier),\n    get('/frontier', getFrontier),\n    post('/frontend-workers', postFrontendWorkers),\n    get('/*', notfound)\n))\n\nconst port = nconf.get('port') ? nconf.get('port') : 8090\nconst host = nconf.get('host') ? nconf.get('host') : '127.0.0.1'\nserver.listen(port, host)\nserver.addListener('listening', () => {\n    console.log(`Server Started on ${host}:${port}`)\n})"],"names":["nconf","env","parseValues","separator","argv","get","post","frontier","config","redisOptions","frontendWorkerPool","frontendWorkers","FEW","process","FRONTEND_WORKERS","i","worker","__dirname","workerData","push","postFrontier","req","res","body","add","url","priority","meta","status","e","error","getFrontier","data","console","postFrontendWorkers","length","workers","wk","terminate","activeWorkers","notfound","server","port","host","listen","addListener","log"],"mappings":";AAAYA,GAAK,CAALA,KAAK;AAEU,GAAO,CAAP,MAAO;AACX,GAAa,CAAb,EAAa;AAER,GAAe,CAAf,YAAe;AAEpB,GAAgB,CAAhB,cAAgB;AAP3BA,KAAK,CACXC,GAAG,CAAC,CAACC;IAAAA,WAAW,EAAE,IAAI;IAAEC,SAAS,EAAC,CAAG;AAAA,CAAC,EAAEC,IAAI;AAQlD,KAAK,CAAC,CAAC,CAACC,GAAG,GAAEC,IAAI,EAAC,CAAC,GANI,EAAa;AAQpC,KAAK,CAACC,QAAQ,GAAG,GAAG,CANQ,YAAe,aAMV,CAAC;IAC9BC,MAAM,EAZER,KAAK,CAYCK,GAAG,CAAC,CAAQ,WAZlBL,KAAK,CAYuBK,GAAG,CAAC,CAAQ,WAAI,IAAI;IACxDI,YAAY,EAbJT,KAAK,CAaOK,GAAG,CAAC,CAAO,UAbvBL,KAAK,CAa4BK,GAAG,CAAC,CAAO,UAAI,CAAC;IAAA,CAAC;AAC9D,CAAC;AACD,GAAG,CAACK,kBAAkB;AAEtB,EAEG,AAFH;;CAEG,AAFH,EAEG,CACH,GAAG,CAACC,eAAe,GAAG,CAAC,CAAC;AACxB,KAAK,CAACC,GAAG,GAAGC,OAAO,CAACZ,GAAG,CAACa,gBAAgB,GAAGD,OAAO,CAACZ,GAAG,CAACa,gBAAgB,GAAG,CAAC;AAC3E,GAAG,CAAC,GAAG,CAACC,EAAC,GAAG,CAAC,EAAEA,EAAC,GAAGH,GAAG,EAAGG,EAAC,GAAG,CAAC;IAC1B,KAAK,CAACC,MAAM,GAAG,GAAG,CAhBC,cAAgB,QAgBTC,SAAS,GAAG,CAAwB,yBAAE,CAAC;QAC7DC,UAAU,EAAE,CAAC;YACTV,MAAM,EAAED,QAAQ,CAACC,MAAM;YACvBC,YAAY,EA1BZT,KAAK,CA0BeK,GAAG,CAAC,CAAO,UA1B/BL,KAAK,CA0BoCK,GAAG,CAAC,CAAO,UAAI,CAAC;YAAA,CAAC;QAC9D,CAAC;IACL,CAAC;IACDM,eAAe,CAACQ,IAAI,CAACH,MAAM;AAC/B,CAAC;AAGD,KAAK,CAACI,YAAY,UAAUC,GAAG,EAAEC,GAAG,GAAK,CAAC;IACtC,KAAK,CAACC,IAAI,GAAG,KAAK,KAhCK,MAAO,OAgCNF,GAAG;IAC3B,GAAG,CAAC,CAAC;QACD,KAAK,CAACd,QAAQ,CAACiB,GAAG,CAACD,IAAI,CAACE,GAAG,EAAEF,IAAI,CAACG,QAAQ,EAAEH,IAAI,CAACI,IAAI;YAlClC,MAAO,OAmCrBL,GAAG,EAAE,GAAG,EAAE,CAAC;YAACM,MAAM,EAAE,CAAI;QAAC,CAAC;IACnC,CAAC,CAAC,KAAK,EAAEC,CAAC,EAAE,CAAC;YApCU,MAAO,OAsCrBP,GAAG,EAAE,GAAG,EAAE,CAAC;YAACM,MAAM,EAAE,CAAO;YAAEE,KAAK,EAAED,CAAC;QAAC,CAAC;IAChD,CAAC;AACL,CAAC;AAED,KAAK,CAACE,WAAW,UAAUV,GAAG,EAAEC,GAAG,GAAK,CAAC;IACrC,GAAG,CAAC,CAAC;QACD,KAAK,CAACU,IAAI,GAAG,KAAK,CAACzB,QAAQ,CAACF,GAAG;YA5CZ,MAAO,OA6CrBiB,GAAG,EAAE,GAAG,EAAE,CAAC;YAACM,MAAM,EAAE,CAAI;YAAEI,IAAI;QAAC,CAAC;IACzC,CAAC,CAAC,KAAK,EAAEH,CAAC,EAAE,CAAC;QACTI,OAAO,CAACH,KAAK,CAACD,CAAC;YA/CI,MAAO,OAgDrBP,GAAG,EAAE,GAAG,EAAE,CAAC;YAACM,MAAM,EAAE,CAAO;YAAEE,KAAK,EAAED,CAAC;QAAC,CAAC;IAChD,CAAC;AACL,CAAC;AAED,KAAK,CAACK,mBAAmB,UAAUb,GAAG,EAAEC,GAAG,GAAK,CAAC;IAC7C,KAAK,CAACC,IAAI,GAAG,KAAK,KArDK,MAAO,OAqDNF,GAAG;IAE3B,EAAE,EAACV,eAAe,CAACwB,MAAM,GAAG,CAAC,IAAIZ,IAAI,CAACa,OAAO,KAAK,CAAC,EAAC,CAAC;QACjD,GAAG,EAAC,GAAG,CAACC,EAAE,IAAI1B,eAAe,CAAC,CAAC;YAC3B,KAAK,CAAC0B,EAAE,CAACC,SAAS;QACtB,CAAC;QACD3B,eAAe,GAAG,CAAC,CAAC;IACxB,CAAC;IAED,GAAG,CAAC,GAAG,CAACI,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAGQ,IAAI,CAACa,OAAO,EAAErB,CAAC,GAAG,CAAC;QAClC,KAAK,CAACC,MAAM,GAAG,GAAG,CA1DH,cAAgB,QA0DLC,SAAS,GAAG,CAAwB,yBAAE,CAAC;YAC7DC,UAAU,EAAE,CAAC;gBACTV,MAAM,EAAED,QAAQ,CAACC,MAAM;gBACvBC,YAAY,EApEhBT,KAAK,CAoEmBK,GAAG,CAAC,CAAO,UApEnCL,KAAK,CAoEwCK,GAAG,CAAC,CAAO,UAAI,CAAC;gBAAA,CAAC;YAC9D,CAAC;QACL,CAAC;QACDM,eAAe,CAACQ,IAAI,CAACH,MAAM;IAC/B,CAAC;QAtEsB,MAAO,OAwEzBM,GAAG,EAAE,GAAG,EAAE,CAAC;QAACM,MAAM,EAAE,CAAI;QAAEW,aAAa,EAAE5B,eAAe,CAACwB,MAAM;IAAC,CAAC;AAC1E,CAAC;AAED,KAAK,CAACK,QAAQ,IAAInB,GAAG,EAAEC,GAAG,OA3EC,MAAO,OA2EEA,GAAG,EAAE,GAAG,EAAE,CAAW;;AAGzD,KAAK,CAACmB,MAAM,OA9Ee,MAAO,cACX,EAAa,SA8EhCnC,IAAI,CAAC,CAAW,YAAEc,YAAY,GAC9Bf,GAAG,CAAC,CAAW,YAAE0B,WAAW,GAC5BzB,IAAI,CAAC,CAAmB,oBAAE4B,mBAAmB,GAC7C7B,GAAG,CAAC,CAAI,KAAEmC,QAAQ;AAGtB,KAAK,CAACE,IAAI,GAvFE1C,KAAK,CAuFEK,GAAG,CAAC,CAAM,SAvFjBL,KAAK,CAuFsBK,GAAG,CAAC,CAAM,SAAI,IAAI;AACzD,KAAK,CAACsC,IAAI,GAxFE3C,KAAK,CAwFEK,GAAG,CAAC,CAAM,SAxFjBL,KAAK,CAwFsBK,GAAG,CAAC,CAAM,SAAI,CAAW;AAChEoC,MAAM,CAACG,MAAM,CAACF,IAAI,EAAEC,IAAI;AACxBF,MAAM,CAACI,WAAW,CAAC,CAAW,gBAAQ,CAAC;IACnCZ,OAAO,CAACa,GAAG,EAAE,kBAAkB,EAAEH,IAAI,CAAC,CAAC,EAAED,IAAI;AACjD,CAAC"}