如何在 AWS Lambda 上设置一个 Node.JS 代理

Question

我试图将 Polyfill.io 服务器作为 AWS Lambda 上的微服务，它应该在 GET 请求上运行 JavaScript 文件。
当我在本地运行服务时，调用通过但它返回一个未定义的对象而不是 JS 文件。

我在本地使用serverless 运行它，我的代码基于polyfill.io's github repo

我已将 service/index.js 修改为：

'use strict';

const express = require('express');
const path = require('path');
const Raven = require('raven');
const morgan = require('morgan');
const shrinkRay = require('./shrink-ray');

const app = express().enable("strict routing");
const one_day = 60 * 60 * 24;
const one_week = one_day * 7;
const one_year = one_day * 365;

app.use(shrinkRay({
  brotli: {quality: 11}
}));

let ravenClient;

// Log requests
if (process.env.ENABLE_ACCESS_LOG) {
    app.use(morgan('method=:method path=":url" request_id=:req[X-Request-ID] status=:status service=:response-time bytes=:res[content-length]'));
}

process.on('uncaughtException', (err) => {
  console.log('Caught exception', err);
});

// Set up Sentry (getsentry.com) to collect JS errors.
if (process.env.SENTRY_DSN) {
    const about = require(path.join(__dirname, '../about.json'));
    ravenClient = new Raven.Client(process.env.SENTRY_DSN, {
        release: about.appVersion || process.env.SENTRY_RELEASE || 'unknown'
    });
    ravenClient.patchGlobal();
    app.use(Raven.middleware.express.requestHandler(ravenClient));
}

// Do not send the X-Powered-By header.
app.disable("x-powered-by");

// Default response headers
app.use((req, res, next) => {

    // Ensure our site is only served over TLS and reduce the chances of someone performing a MITM attack.
    res.set('Strict-Transport-Security', `max-age=${one_year}; includeSubdomains; preload`);

    // Enables the cross-site scripting filter built into most modern web browsers.
    res.set('X-XSS-Protection', `1; mode=block`);

    // Prevents MIME-sniffing a response away from the declared content type.
    res.set('X-Content-Type-Options', `nosniff`);


    // Sets content-type
    res.set('Content-Type', `application/javascript`);

    // Prevents clickjacking by prohibiting our site from being included on other domains in an iframe.
    res.set('X-Frame-Options', `sameorigin`);

    res.set('Cache-Control', 'public, s-maxage=' + one_year + ', max-age=' + one_week + ', stale-while-revalidate=' + one_week + ', stale-if-error=' + one_week);
    res.set('Surrogate-Key', process.env.SURROGATE_KEY || 'polyfill-service');
    res.set('Timing-Allow-Origin', '*');
    return next();
});


/* Routes */

app.use(require('./routes/api.js'));
app.use(require('./routes/meta.js'));
app.use('/test', require('./routes/test.js'));

if (process.env.RUM_MYSQL_DSN) {
    app.use(require('./routes/rum.js'));
}

app.use(/^\/v[12]\/assets/, express.static(__dirname + '/../docs/assets'));


if (process.env.SENTRY_DSN) {
    app.use(Raven.middleware.express.errorHandler(ravenClient));
}

module.exports.node = (event, context, callback) => {
    const response = {
      statusCode: 200,
      body: JSON.stringify({
        message: 'Go Serverless v1.0! Your function executed successfully!',
        input: event,
      }),
    };
    callback(event, app);
};

这是我的 serverless.yml：

service: serverless-node
provider:
  name: aws
  region: us-east-1
  stage: dev
  runtime: nodejs6.10

functions:
  node:
    handler: service/index.node
    events:
      - http:
        path: node
        method: get

Answer 1

我认为您需要在处理程序的回调中传回响应对象，例如

callback(null, response);