add outbound redis example

Signed-off-by: karthik2804 <karthik.ganeshram@fermyon.com>

examples/typescript/spin-host-apis/spin-redis/README.md

@@ -0,0 +1,23 @@
+# Using Spin Outbound Redis
+
+This example showcases using outbound Redis using the Spin SDK.
+
+## Install Dependencies
+Install the necessary npm packages:
+
+```bash
+npm install
+```
+
+## Prerequisites
+
+- A Redis server is running at `localhost:6379`
+
+## Building and Running the Example
+
+```bash
+spin build
+spin up
+```
+
+Use e.g. `curl -v http://127.0.0.1:3000/` to test the endpoint.

examples/typescript/spin-host-apis/spin-redis/knitwit.json

@@ -0,0 +1,14 @@
+{
+  "version": 1,
+  "project": {
+    "worlds": [
+      "spin-http"
+    ]
+  },
+  "packages": {
+    "@fermyon/spin-sdk": {
+      "witPath": "../../bin/wit",
+      "world": "spin-imports"
+    }
+  }
+}

examples/typescript/spin-host-apis/spin-redis/package.json

@@ -0,0 +1,23 @@
+{
+    "name": "spin-redis",
+    "version": "1.0.0",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "build": "npx webpack --mode=production && npx mkdirp target && npx j2w -i dist.js -n spin-http -o target/spin-redis.wasm",
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "keywords": [],
+    "author": "",
+    "license": "ISC",
+    "devDependencies": {
+        "mkdirp": "^3.0.1",
+        "ts-loader": "^9.4.1",
+        "typescript": "^4.8.4",
+        "webpack": "^5.74.0",
+        "webpack-cli": "^4.10.0"
+    },
+    "dependencies": {
+        "@fermyon/spin-sdk": "^2.0.0-alpha.3"
+    }
+}

examples/typescript/spin-host-apis/spin-redis/spin.toml

@@ -0,0 +1,19 @@
+spin_manifest_version = 2
+
+[application]
+authors = ["karthik2804 <karthik.ganeshram@fermyon.com>"]
+description = ""
+name = "spin-redis"
+version = "0.1.0"
+
+[[trigger.http]]
+route = "/..."
+component = "spin-redis"
+
+[component.spin-redis]
+source = "target/spin-redis.wasm"
+exclude_files = ["**/node_modules"]
+allowed_hosts = ["redis://*:*"]
+[component.spin-redis.build]
+command = "npm run build"
+watch = ["src/**/*.ts", "package.json"]

examples/typescript/spin-host-apis/spin-redis/src/index.ts

@@ -0,0 +1,25 @@
+import { ResponseBuilder, Redis } from "@fermyon/spin-sdk";
+
+const encoder = new TextEncoder()
+const decoder = new TextDecoder()
+const redisAddress = "redis://localhost:6379/"
+
+export async function handler(_req: Request, res: ResponseBuilder) {
+
+    try {
+        let db = Redis.open(redisAddress)
+        db.set("test", encoder.encode("Hello world"))
+        let val = db.get("test")
+
+        if (!val) {
+            res.status(404)
+            res.send()
+            return
+        }
+
+        res.send(val)
+    } catch (e: any) {
+        res.status(500)
+        res.send(`Error: ${JSON.stringify(e.payload)}`)
+    }
+}

examples/typescript/spin-host-apis/spin-redis/src/spin.ts

@@ -0,0 +1,22 @@
+import { ResponseBuilder } from "@fermyon/spin-sdk";
+import { handler } from ".";
+
+//@ts-ignore
+addEventListener('fetch', (event: FetchEvent) => {
+    handleEvent(event);
+});
+
+async function handleEvent(event: FetchEvent) {
+
+    let resolve: any, reject: any;
+    let responsePromise = new Promise(async (res, rej) => {
+        resolve = res;
+        reject = rej;
+    });
+    //@ts-ignore
+    event.respondWith(responsePromise);
+
+    let res = new ResponseBuilder(resolve);
+
+    await handler(event.request, res)
+}

examples/typescript/spin-host-apis/spin-redis/tsconfig.json

@@ -0,0 +1,18 @@
+{
+    "compilerOptions": {
+        "outDir": "./dist/",
+        "noImplicitAny": true,
+        "module": "es6",
+        "target": "es2020",
+        "jsx": "react",
+        "skipLibCheck": true,
+        "lib": [
+            "ES2015",
+            "WebWorker"
+        ],
+        "allowJs": true,
+        "strict": true,
+        "noImplicitReturns": true,
+        "moduleResolution": "node"
+    }
+}

examples/typescript/spin-host-apis/spin-redis/webpack.config.js

@@ -0,0 +1,35 @@
+const path = require('path');
+const SpinSdkPlugin = require("@fermyon/spin-sdk/plugins/webpack")
+
+module.exports = {
+    entry: './src/spin.ts',
+    experiments: {
+        outputModule: true,
+    },
+    module: {
+        rules: [
+            {
+                test: /\.tsx?$/,
+                use: 'ts-loader',
+                exclude: /node_modules/,
+            },
+        ],
+    },
+    resolve: {
+        extensions: ['.tsx', '.ts', '.js'],
+    },
+    output: {
+        path: path.resolve(__dirname, './'),
+        filename: 'dist.js',
+        module: true,
+        library: {
+            type: "module",
+        }
+    },
+    plugins: [
+        new SpinSdkPlugin()
+    ],
+    optimization: {
+        minimize: false
+    },
+};

examples/typescript/spin-host-apis/spin-variables/package.json

@@ -4,7 +4,7 @@
     "description": "",
     "main": "index.js",
     "scripts": {
-        "build": "npx webpack --mode=production && npx mkdirp target && npx j2w -i dist.js -n spin-http -o target/octokit-rest.wasm",
+        "build": "npx webpack --mode=production && npx mkdirp target && npx j2w -i dist.js -n spin-http -o target/spin-variables.wasm",
         "test": "echo \"Error: no test specified\" && exit 1"
     },
     "keywords": [],