“无服务器离线：未找到路由。” 在离线模式下运行 AWS Lambda 函数

Question

这个问题与Serverless offline not getting route几乎相同，但由于没有回答这个问题，我再次问。我正在尝试关注这篇文章https://medium.com/@awesome1888/how-to-use-serverless-locally-with-webpack-and-docker-5e268f71715，了解如何使用无服务器部署 Lambda 函数。

我有一个具有以下结构的目录：

> tree -I node_modules
.
??? package-lock.json
??? package.json
??? serverless.yml
??? src
?   ??? handler.js
?   ??? index.js
??? webpack.config.js

哪里serverless.yml读

service: my-first-lambda

plugins:
  - serverless-webpack
  - serverless-offline

provider:
  name: aws
  runtime: nodejs10.x
  region: us-east-1
  stage: dev

functions:
  hello:
    handler: src/handler.main
    events:
      - http:
        path: /hello
        method: any

custom:
  webpack:
    includeModules: true

src/index.js 阅读

import moment from 'moment';

const handler = async (event, context) => {
  const body = await new Promise((resolve) => {
    setTimeout(() => {
      resolve(`Hello, this is your lambda speaking. Today is ${moment().format('dddd')}`)
    }, 2000);
  });
  return {
    statusCode: 200,
    body,
  };
}

export default handler;

src/handler.js 阅读

export { default as main } from './index';

并webpack.config.js阅读

const path = require("path");
const nodeExternals = require("webpack-node-externals");
const slsw = require("serverless-webpack");

module.exports = {
  entry: slsw.lib.entries,
  target: "node",
  mode: slsw.lib.webpack.isLocal ? "development" : "production",
  externals: [nodeExternals()],
  output: {
    libraryTarget: "commonjs",
    path: path.join(__dirname, ".webpack"),
    filename: "[name].js"
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        use: [
          {
            loader: "babel-loader",
            options: {
              presets: ["@babel/preset-env"],
              plugins: ["@babel/plugin-proposal-object-rest-spread"]
            }
          }
        ]
      }
    ]
  }
};

问题是当我在离线模式下启动该功能时，它似乎只有一个非常具体的路线：

> 
npx serverless offline start --region us-east-1 --noTimeout --port 3000 --host 0.0.0.0
Serverless: Bundling with Webpack...
Time: 1203ms
Built at: 08/30/2019 2:35:10 PM
         Asset      Size       Chunks             Chunk Names
src/handler.js  6.81 KiB  src/handler  [emitted]  src/handler
Entrypoint src/handler = src/handler.js
[./src/handler.js] 42 bytes {src/handler} [built]
[./src/index.js] 1.64 KiB {src/handler} [built]
[moment] external "moment" 42 bytes {src/handler} [built]
Serverless: Watching for changes...
Serverless: Starting Offline: dev/us-east-1.

Serverless: Routes for hello:
Serverless: POST /{apiVersion}/functions/my-first-lambda-dev-hello/invocations

Serverless: Offline [HTTP] listening on http://0.0.0.0:3000
Serverless: Enter "rp" to replay the last request

如果我去http://localhost:3000/hello，我会得到这个回应：

{"statusCode":404,"error":"Serverless-offline: route not found.","currentRoute":"get - /hello","existingRoutes":["post - /{apiVersion}/functions/my-first-lambda-dev-hello/invocations"]}

知道为什么这不起作用吗？（我已经仔细阅读了https://serverless.com/framework/docs/，但无法快速找到答案）。

Answer 1

我有这个问题，如果有人遇到它，这个github 评论解决了我的问题。

您可以运行$ sls offline start --noPrependStageInUrl或将以下内容添加到您的serverless.yml文件中

custom:
  serverless-offline:
    noPrependStageInUrl: true

根据评论：

我对 6+ 的任何东西都有这个问题，这是因为它现在默认将暂存名称附加到 url 路径。要恢复到旧方式，您需要将 --noPrependStageInUrl 添加到 cli 或无服务器文件 custom: serverless-offline noPrependStageInUrl: true 以恢复到以前的设置。我正在测试它，但@dherault 该功能并未反映 AWS 中实际发生的情况。

我正在使用serverless-offline: "6.7.0"，我的index.handler如下：

const serverless = require("serverless-http");
const express = require("express");
const app = express();

app.get("/", function (req, res) {
  res.send("Hello World!");
});

module.exports.handler = serverless(app);

和我的 serverless.yml

plugins:
  - serverless-offline

custom:
  serverless-offline:
    noPrependStageInUrl: true

provider:
  name: aws
  runtime: nodejs12.x
  stage: dev
  region: eu-west-2

functions:
  app:
    handler: src/index.handler
    events:
      - http: ANY /
      - http: "ANY {proxy+}"

抱歉，这不是一个很好的答案，但希望有人遇到这个问题，这是他们问题的解决方案。

Answer 2

看起来您的serverless.yml文件中存在空格问题。

尝试缩进path和method下http块：

functions:
  hello:
    handler: src/handler.main
    events:
      - http:
          path: /hello
          method: any

Answer 3

使用无服务器模板设置一个快速示例：

sls create -h

输出 ：

create ........................ Create new Serverless service
--template / -t .................... Template for the service. Available templates: "aws-clojure-gradle", "aws-clojurescript-gradle", "aws-nodejs", "aws-nodejs-typescript", "aws-alexa-typescript", "aws-nodejs-ecma-script", "aws-python", "aws-python3", "aws-groovy-gradle", "aws-java-maven", "aws-java-gradle", "aws-kotlin-jvm-maven", "aws-kotlin-jvm-gradle", "aws-kotlin-nodejs-gradle", "aws-scala-sbt", "aws-csharp", "aws-fsharp", "aws-go", "aws-go-dep", "aws-go-mod", "aws-ruby", "aws-provided", "azure-nodejs", "cloudflare-workers", "cloudflare-workers-enterprise", "cloudflare-workers-rust", "fn-nodejs", "fn-go", "google-nodejs", "google-python", "google-go", "kubeless-python", "kubeless-nodejs", "openwhisk-java-maven", "openwhisk-nodejs", "openwhisk-php", "openwhisk-python", "openwhisk-ruby", "openwhisk-swift", "spotinst-nodejs", "spotinst-python", "spotinst-ruby", "spotinst-java8", "plugin" and "hello-world"

步骤1：因此生成了一个带有api的新nodejs示例：

sls create -t aws-nodejs-ecma-script -n service-name-hello-world

步骤2：安装serverless-offline：

npm install serverless-offline -D

步骤3：在serverless.yml中

plugins:
  - serverless-webpack
  - serverless-offline

第四步：启动本地服务器

serverless offline start -r us-west-1 --stage dev

github 示例

git clone https://github.com/ysfmag/aws-serverless-nodejs-example
cd aws-serverless-nodejs-example
yarn 
yarn start 

无服务器.yml

要在无服务器框架中定义 api，您需要遵循 yaml 格式，并且在路径变量中，您不需要以“/hello”开头，只需“hello”即可。

functions:
  hello:
  handler: src/handler.main
  events:
    - http:
        path: hello
        method: get