LiteRT/Interceptor

A simple implements for interceptor in JavaScript/TypeScript.

Requirement

• TypeScript v5 (or newer)
• Node.js v16 (or newer)

Installation

npm i @litert/interceptor --save

Usage

import { InterceptorChain } from "@litert/interceptor";

const chain = new InterceptorChain<IApiRequest, IApiResponse>([

    async function(ctx, next) { // logger

        const STARTED = Date.now();

        try {

            await next();
            console.log(`[INFO] ${ctx.input.method} ${ctx.input.url} ${Date.now() - STARTED}ms`);
        }
        catch (e) {

            console.error(`[ERROR] ${ctx.input.method} ${ctx.input.url} ${Date.now() - STARTED}ms`);
            console.error(e);
        }
    },

    async function(ctx) { // auth

        await authMgr.authenticate(ctx.input);
    },

    async function(ctx, next) { // rate limit

        await rateLimitMgr.check(ctx.input);
    },

    async function(ctx) { // dispatcher

        ctx.result = await apiDispatcher.dispatch(ctx.input);
    }
]);

const result = await chain.execute(apiReq);

See more in examples.

License

This library is published under Apache-2.0 license.