@marblejs/proxy v2.3.0-dev.7

@marblejs/proxy

A simple proxy server for Marble.js. It allows to send and receive requests from any server defined as (req: IncomingMessage, res: OutgoingMessage) => void. It is a base for @marblejs/testing and @marblejs/serverless packages.

Installation

$ npm i @marblejs/proxy

Documentation

For the latest updates, documentation, change log, and release information visit docs.marblejs.com and follow @marble_js on Twitter.

Usage

import { ServerProxy, ServerApp, ServerProxyRequest, ServerProxyResponse } from '@marblejs/proxy';

export interface MyRequest {
  headers: Record<string, string>;
  method: string;
  path: string;
  body?: string;
}

export interface MyResponse {
  headers: Record<string, string>;
  body: string;
  code: number;
}

export class MyProxy extends ServerProxy<MyRequest, MyResponse> {

  constructor(app: ServerApp) {
    super(app);
  }

  normalizeError(error: Error): MyResponse {
    return {
      code: 502,
      body: error.message,
      headers: {},
    };
  }

  normalizeRequest(proxyRequest: MyRequest): ServerProxyRequest {
    const {
      body,
      headers,
      method,
      path,
    } = proxyRequest;
    return {
      headers,
      // Convert body to buffer
      body: body !== undefined ? Buffer.from(body) : undefined,
      method,
      path
    };
  }

  normalizeResponse(serverProxyResponse: ServerProxyResponse): MyResponse {
    const {
      headers,
      body,
      statusCode,
    } = serverProxyResponse;

    return {
      // Convert multi-value headers from Record<string, string[]>
      headers: Object.keys(headers).reduce((result, key) => {
        result[key] = headers[key][0];
        return headers;
      }, {}),
      // Convert body from Buffer to string
      body: body.toString(),
      code: statusCode,
    };
  }
}

License: MIT