@anissoft/echo

Easy-to-use network intercepting tool for nodeJS

Installation

npm --registry=https://registry.npmjs.org i @anissoft/echo@latest # add --save-dev if you have no intends to include it into production build, or --no-save if you want to use just debugging interface

Usage

UI for requests analysis

Import startUI command from package and execute it in the very beginning of your program. It will start the static server and provide the exact link to the web interface in terminal.

require('@anissoft/echo').startUI({ port: 4900 });
// or just
require('@anissoft/echo').start();

The best way to do so - is to place the above code in a separate file (e.g. debug.js) and import it in your application's entry point (e.g. index.js).

You may skip passing a port attribute, but it is easier to use the same port between restarts, so you dont need to search new url in logs every time.

Custom onRequest listeners (experimental)

You can capture all requests (incoming and outgoing) and run your custom callbacks for the next events:

Event name	Description	Event content
RequestEvent.incomingRequestStart	received incoming request	method, url, timeStart, requestHeaders, request
RequestEvent.outgoingRequestStart	sent request	method, url, timeStart, requestHeaders, request
RequestEvent.incomingRequestFinish	sent response for request	method, url, timeStart, requestHeaders, request, statusCode, statusMessage, timeEnd, responseHeaders, response
RequestEvent.outgoingRequestFinish	received response for request	method, url, timeStart, requestHeaders, request, statusCode, statusMessage, timeEnd, responseHeaders, response

const { subscribe, RequestEvent } = require('@anissoft/echo');

const unsubscribes = [
  subscribe(
    RequestEvent.incomingRequestStart, 
    event => console.log('incoming-start', event),
  ),
  subscribe(
    RequestEvent.incomingRequestFinish, 
    event => console.log('incoming-end', event),
  ),
  subscribe(
    RequestEvent.outgoingRequestStart, 
    event => console.log('outgoing-start', event),
  ),
  subscribe(
    RequestEvent.outgoingRequestFinish, 
    event => console.log('outgoing-end', event)
  ),
];

Make sure not to expose any sensetive data from events
eg. personal data, API-keys or authorizations headers