crowdsec-client

crowdsec-client

This library is a Node.js client to talk with crowdsec rest API .

Start

install it

npm i crowdsec-client

Usage

as a Bouncer

First, create a client, pointing to your crowdsec instance . With a bouncer api key (doc)

const client = new BouncerClient({
    url: process.env.CROWDSEC_URL,
    auth: {
        apiKey: process.env.CROWDSEC_API_KEY || ''
    },
    //use this option if you use a self signed ssl certificate
    strictSSL: false
});
await client.login();

Second, ask for a decision

const stream = client.Decisions.getStream({
    //the stream will poll the API at the interval . in ms
    interval: 10000
});

//or with filters
const filteredStream = client.Decisions.getStream({
    //the stream will poll the API at the interval . in ms
    interval: 10000,
    scopes: ['ip', 'range'],
    origins: ['capi'] ,
    scenarios_containing: ['bruteforce'],
    scenarios_not_containing: ['slow'],
});

now, use this stream

import * as stream from "stream";

stream.on('added', (decision) => {
    //will be emited when a new decision is added
});

stream.on('deleted', (decision) => {
    //will be emitted when a decision is deleted
});

//you can control the stream

//start the stream
stream.resume();

//pause the stream
stream.pause()

//check if the stream is paused
if(stream.paused) {

}

it's also possible to use a callback, but you can't control the stream (I recommend using the stream)

const stream = client.Decisions.getStream(
    {
        //the stream will poll the API at the interval . in ms
        interval: 10000
    },
    (err, {decision, type}) => {
        if(err) {
            console.error(err);
            return;
        }

        if(type === 'added') {
            //when a new decision is added
        }

        if(type === 'deleted') {
            //when a new decision is added
        }
    });

as a Watcher

First, create a client, pointing to your crowdsec instance . With a machine login/password (doc)

const client = new WatcherClient({
    url: process.env.CROWDSEC_URL,
    auth: {
        machineID: 'nameOfTheMachine',
        password: 'password',
        //the crowdsec token is valid for only 1h ... did you want to autorenew it ?
        autoRenew: true,
    },
    //use this option if you use a self signed ssl certificate
    strictSSL: false
});
await client.login();

Search for Alert

//get alerts with an active decision
const alerts = await client.Alerts.search({
    has_active_decision: true
});

//select one alert
const alert = alerts[0]
if(!alert.id) {
    //do something if no id
}

//delete it ?
await client.Alerts.deleteById(alert.id);

//or delete all the alerts about an ip
await client.Alerts.delete({
    ip: '127.0.0.1'
});

Debug

this library include debug, to debug, you can set the env variable :

DEBUG=crowdsec-client:*