aws js: implement with hardcoded archive/tile path

serverless/awsjs/package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.0.0",
       "devDependencies": {
         "@types/aws-lambda": "^8.10.108",
+        "@types/node": "^18.11.2",
         "esbuild-runner": "^2.2.2",
         "typescript": "^4.8.4",
         "zora": "^5.1.0"
@@ -54,6 +55,12 @@
       "integrity": "sha512-1yh1W1WoqK3lGHy+V/Fi55zobxrDHUUsluCWdMlOXkCvtsCmHPXOG+CQ2STIL4B1g6xi6I6XzxaF8V9+zeIFLA==",
       "dev": true
     },
+    "node_modules/@types/node": {
+      "version": "18.11.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.2.tgz",
+      "integrity": "sha512-BWN3M23gLO2jVG8g/XHIRFWiiV4/GckeFIqbU/C4V3xpoBBWSMk4OZomouN0wCkfQFPqgZikyLr7DOYDysIkkw==",
+      "dev": true
+    },
     "node_modules/buffer-from": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
@@ -522,6 +529,12 @@
       "integrity": "sha512-1yh1W1WoqK3lGHy+V/Fi55zobxrDHUUsluCWdMlOXkCvtsCmHPXOG+CQ2STIL4B1g6xi6I6XzxaF8V9+zeIFLA==",
       "dev": true
     },
+    "@types/node": {
+      "version": "18.11.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.2.tgz",
+      "integrity": "sha512-BWN3M23gLO2jVG8g/XHIRFWiiV4/GckeFIqbU/C4V3xpoBBWSMk4OZomouN0wCkfQFPqgZikyLr7DOYDysIkkw==",
+      "dev": true
+    },
     "buffer-from": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",

serverless/awsjs/package.json

@@ -3,6 +3,7 @@
   "version": "0.0.0",
   "devDependencies": {
     "@types/aws-lambda": "^8.10.108",
+    "@types/node": "^18.11.2",
     "esbuild-runner": "^2.2.2",
     "typescript": "^4.8.4",
     "zora": "^5.1.0"
@@ -11,6 +12,6 @@
   "scripts": {
     "test": "node -r esbuild-runner/register src/index.test.ts",
     "tsc": "tsc --noEmit --watch",
-    "build": "esbuild src/index.ts --target=es2020 --outfile=dist/index.js --format=cjs --bundle --banner:js=//$(git describe --always) && cd dist && zip lambda_function.zip index.js"
+    "build": "esbuild src/index.ts --target=es2020 --outfile=dist/index.js --format=cjs --bundle --platform=node  --target=node16 --external:/var/runtime/node_modules/aws-sdk/clients/s3.js --banner:js=//$(git describe --always) && cd dist && zip lambda_function.zip index.js"
   }
 }

serverless/awsjs/src/index.ts

@@ -1,14 +1,81 @@
-import "../../../js";
-
+import { Readable } from "stream";
 import { Context, APIGatewayProxyResult, APIGatewayEvent } from "aws-lambda";
+import {
+	PMTiles,
+	ResolvedValueCache,
+	RangeResponse,
+	Source,
+} from "../../../js";
+
+// @ts-ignore
+import https from "https";
+// @ts-ignore
+import s3client from "/var/runtime/node_modules/aws-sdk/clients/s3.js";
+
+const keepAliveAgent = new https.Agent({ keepAlive: true });
+const s3 = new s3client({
+	region: process.env.BUCKET_REGION!,
+	httpOptions: { agent: keepAliveAgent },
+});
+
+// TODO: figure out how much memory to allocate
+const CACHE = new ResolvedValueCache();
+
+class S3Source implements Source {
+	archive_name: string;
+
+	constructor(archive_name: string) {
+		this.archive_name = archive_name;
+	}
+
+	getKey() {
+		return "";
+	}
+
+	async getBytes(offset: number, length: number): Promise<RangeResponse> {
+		const resp = await s3
+			.getObject({
+				Bucket: process.env.BUCKET!,
+				Key: this.archive_name + ".pmtiles",
+				Range: "bytes=" + offset + "-" + (offset + length - 1),
+			})
+			.promise();
+
+		return { data: resp!.Body.buffer };
+	}
+}
 
 export const handler = async (
 	event: APIGatewayEvent,
 	context: Context
 ): Promise<APIGatewayProxyResult> => {
-	const response = {
-		statusCode: 200,
-		body: JSON.stringify("Hello from Lambda!"),
+	try {
+		const source = new S3Source("stamen_toner_z3");
+		const p = new PMTiles(source, CACHE);
+
+		const tile = await p.getZxy(0, 0, 0);
+		if (tile) {
+			return {
+				statusCode: 200,
+				body: Buffer.from(tile.data).toString("base64"),
+			};
+		} else {
+			return {
+				statusCode: 204,
+				body: "",
+			};
+		}
+	} catch (e) {
+		if ((e as Error).name === "AccessDenied") {
+			return {
+				statusCode: 403,
+				body: "Bucket access failed: Unauthorized",
+			};
+		}
+		throw e;
+	}
+	return {
+		statusCode: 404,
+		body: "Invalid URL",
 	};
-	return response;
 };