如何通过 API 网关公开存储在 aws lambda 代码中的 static 目录？

Question

I am trying to serve static react app bundle using aws lambda only. I have used a NodejsFunction and applied commandHooks during bundling to bundle a react build along with my code as shown below. I have also attached it to an API gateway as u can see.

  private uiLmbda = new NodejsFunction(this, "renderer", {
    entry: path.join(__dirname, "..", "handlers", "ui-handler.ts"),
    handler: "handler",
    bundling: {
      commandHooks: {
        beforeBundling(inputDir: string, outputDir: string) {
          const staticAssets = path.join(__dirname, "..", "build");
          const relativePath = path.relative(inputDir, staticAssets);
          return [`cp -r ${relativePath} ${outputDir}`];
        },
        afterBundling(inputDir: string, outputDir: string) {
          return [];
        },
        beforeInstall() {
          return [];
        },
      },
    },
  });

  private scanAPI = new RestApi(this, "scan-api");
  private uiGatewayIntegration: LambdaIntegration = new LambdaIntegration(
    this.uiLmbda
  );

And in constructor i am calling this:-

 this.scanAPI.root.addMethod("GET", this.uiGatewayIntegration, {});

Now,i have an index.js as my lambda handler and a build folder with index.html and other refered static files as shown below.

the handler code is as shown:-

import * as fs from "fs";
import * as path from "path";

export const handler = async (event: any) => {
  try {
    console.log(path.resolve("./build/index.html"));
    return {
      statusCode: 200,
      headers: {
        "content-type": "text/html",
      },
      body: fs
        .readFileSync(path.join(__dirname, "build", "index.html"))
        .toString("utf-8"),
      isBase64Encoded: false,
    };
  } catch (error) {
    console.log(error);
  }
};

so i am able to send the html using above handler. but not the relative files as it seems the api gateway is not aware that i wish to render subdirectories from the get method. Any help on how i can do that? attching screenshots where u can see that main.js ( referenced through html as <script src='/task/var/build/main'><script/> ) gives 403 from api gateway.

Answer 1

Okay, turns out i needed to handle this case in 2 places, one was api gateway and other was lambda handler. I attached the lambda to serve static files using express.static and in api gateway i enabled proxy, and it worked.