Create separate module for S3 client

packages/libs/lambda-at-edge/rollup.config.js

@@ -47,5 +47,7 @@ export default [
   { filename: "api-handler", minify: false },
   { filename: "api-handler", minify: true },
   { filename: "image-handler", minify: false },
-  { filename: "image-handler", minify: true }
+  { filename: "image-handler", minify: true },
+  { filename: "s3-client", minify: false },
+  { filename: "s3-client", minify: true }
 ].map(generateConfig);

packages/libs/lambda-at-edge/src/build.ts

@@ -230,7 +230,11 @@ class Builder {
    * @param shouldMinify
    */
   async processAndCopyHandler(
-    handlerType: "api-handler" | "default-handler" | "image-handler",
+    handlerType:
+      | "api-handler"
+      | "default-handler"
+      | "image-handler"
+      | "s3-client",
     destination: string,
     shouldMinify: boolean
   ) {
@@ -298,6 +302,11 @@ class Builder {
         join(this.outputDir, DEFAULT_LAMBDA_CODE_DIR, "index.js"),
         !!this.buildOptions.minifyHandlers
       ),
+      this.processAndCopyHandler(
+        "s3-client",
+        join(this.outputDir, DEFAULT_LAMBDA_CODE_DIR, "s3-client.js"),
+        !!this.buildOptions.minifyHandlers
+      ),
       this.buildOptions?.handler
         ? fse.copy(
             join(this.nextConfigDir, this.buildOptions.handler),

packages/libs/lambda-at-edge/src/default-handler.ts

@@ -620,7 +620,7 @@ const handleOriginResponse = async ({
   const bucketName = domainName.replace(`.s3.${region}.amazonaws.com`, "");
 
   // Lazily import only S3Client to reduce init times until actually needed
-  const { S3Client } = await import("@aws-sdk/client-s3/S3Client");
+  const { S3Client } = require("./s3-client.js");
 
   const s3 = new S3Client({
     region: request.origin?.s3?.region,
@@ -675,9 +675,7 @@ const handleOriginResponse = async ({
         ContentType: "text/html",
         CacheControl: "public, max-age=0, s-maxage=2678400, must-revalidate"
       };
-      const { PutObjectCommand } = await import(
-        "@aws-sdk/client-s3/commands/PutObjectCommand"
-      );
+      const { PutObjectCommand } = require("./s3-client.js");
       await Promise.all([
         s3.send(new PutObjectCommand(s3JsonParams)),
         s3.send(new PutObjectCommand(s3HtmlParams))
@@ -742,9 +740,7 @@ const handleOriginResponse = async ({
         body: html
       };
     } else {
-      const { GetObjectCommand } = await import(
-        "@aws-sdk/client-s3/commands/GetObjectCommand"
-      );
+      const { GetObjectCommand } = require("./s3-client.js");
       // S3 Body is stream per: https://github.com/aws/aws-sdk-js-v3/issues/1096
       const getStream = await import("get-stream");
 

packages/libs/lambda-at-edge/src/s3-client.ts

@@ -0,0 +1,9 @@
+import { GetObjectCommand } from "@aws-sdk/client-s3/commands/GetObjectCommand";
+import { PutObjectCommand } from "@aws-sdk/client-s3/commands/PutObjectCommand";
+import { S3Client } from "@aws-sdk/client-s3/S3Client";
+
+module.exports = {
+  GetObjectCommand,
+  PutObjectCommand,
+  S3Client
+};

packages/libs/lambda-at-edge/tsconfig.build.json

@@ -9,6 +9,7 @@
     "node_modules",
     "./src/api-handler.ts",
     "./src/default-handler.ts",
-    "./src/image-handler.ts"
+    "./src/image-handler.ts",
+    "./src/s3-client.ts"
   ]
 }

packages/libs/lambda-at-edge/tsconfig.bundle.json

@@ -11,5 +11,10 @@
     "allowJs": true,
     "resolveJsonModule": true
   },
-  "include": ["./src/default-handler.ts", "./src/api-handler.ts", "./src/image-handler.ts"]
+  "include": [
+    "./src/default-handler.ts",
+    "./src/api-handler.ts",
+    "./src/image-handler.ts",
+    "./src/s3-client.ts"
+  ]
 }