update common pattern examples

Signed-off-by: karthik2804 <[email protected]>

Author: karthik2804

examples/common-patterns/outbound-http/.gitignore

@@ -0,0 +1,5 @@
+node_modules
+dist
+target
+.spin/
+dist.js

examples/common-patterns/outbound-http/.npmrc

@@ -0,0 +1 @@
+KNITWIT_SOURCE=./config/knitwit.json

examples/common-patterns/outbound-http/README.md

@@ -2,12 +2,9 @@
 
 This example showcases making an outbound HTTP request and returning the response.
 
-## Install Dependencies
-Install the necessary npm packages:
+## Configuring `allowed_outbound_hosts` in `spin.toml`
 
-```bash
-npm install
-```
+The `allowed_outbound_hosts` needs to include the address of the host to which the guest tried to call. In the case of this example, the host is `https://random-data-api.fermyon.app/` which is added in the `spin.toml`
 
 ## Building and Running the Example
 

examples/common-patterns/outbound-http/knitwit.json renamed to examples/common-patterns/outbound-http/config/knitwit.json

@@ -1,25 +1,25 @@
 {
-  "name": "outbound-http",
-  "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
-  "scripts": {
-    "build": "npx webpack --mode=production && npx mkdirp target && npx j2w -i dist.js -d combined-wit -n combined -o target/outbound-http.wasm",
-    "test": "echo \"Error: no test specified\" && exit 1",
-    "postinstall": "knitwit"
-  },
-  "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": "^2.3.0"
-  }
-}
-
+    "name": "outbound-http",
+    "version": "1.0.0",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "build": "knitwit --out-dir build/wit/knitwit --out-world combined && npx webpack --mode=production && npx mkdirp dist && npx j2w -i build/bundle.js -d build/wit/knitwit -n combined -o dist/outbound-http.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",
+        "@fermyon/knitwit": "0.3.0"
+    },
+    "dependencies": {
+        "@fermyon/spin-sdk": "^3.0.0-rc1",
+        "itty-router": "^5.0.18"
+    }
+}

examples/common-patterns/outbound-http/package-lock.json

@@ -11,9 +11,9 @@ route = "/..."
 component = "outbound-http"
 
 [component.outbound-http]
-source = "target/outbound-http.wasm"
+source = "dist/outbound-http.wasm"
 exclude_files = ["**/node_modules"]
-allowed_outbound_hosts = ["*://*:*"]
+allowed_outbound_hosts = ["https://random-data-api.fermyon.app/"]
 [component.outbound-http.build]
-command = "npm run build"
-watch = ["src/**/*.ts", "package.json"]
+command = ["npm install", "npm run build"]
+watch = ["src/**/*.ts"]

examples/common-patterns/outbound-http/package.json

@@ -1,10 +1,22 @@
-import { ResponseBuilder } from '@fermyon/spin-sdk';
+// https://itty.dev/itty-router/routers/autorouter
+import { AutoRouter } from 'itty-router';
 
-export async function handler(_req: Request, res: ResponseBuilder) {
-  let response = await fetch(
-    'https://random-data-api.fermyon.app/physics/json',
-  );
-  let physicsFact = await response.text();
+let router = AutoRouter();
 
-  res.send(physicsFact);
+// Route ordering matters, the first route that matches will be used
+// Any route that does not return will be treated as a middleware
+// Any unmatched route will return a 404
+router
+    .get("*", getDataFromAPI)
+
+async function getDataFromAPI(_request: Request) {
+    let response = await fetch(
+        'https://random-data-api.fermyon.app/physics/json',
+    );
+    return response;
 }
+
+//@ts-ignore
+addEventListener('fetch', async (event: FetchEvent) => {
+    event.respondWith(router.fetch(event.request));
+});

examples/common-patterns/outbound-http/spin.toml

@@ -1,33 +1,35 @@
 const path = require('path');
-const SpinSdkPlugin = require('@fermyon/spin-sdk/plugins/webpack');
+const SpinSdkPlugin = require("@fermyon/spin-sdk/plugins/webpack")
 
 module.exports = {
-  entry: './src/spin.ts',
-  experiments: {
-    outputModule: true,
-  },
-  module: {
-    rules: [
-      {
-        test: /\.tsx?$/,
-        use: 'ts-loader',
-        exclude: /node_modules/,
-      },
+    entry: './src/index.ts',
+    experiments: {
+        outputModule: true,
+    },
+    module: {
+        rules: [
+            {
+                test: /\.tsx?$/,
+                use: 'ts-loader',
+                exclude: /node_modules/,
+            },
+        ],
+    },
+    resolve: {
+        extensions: ['.tsx', '.ts', '.js'],
+    },
+    output: {
+        path: path.resolve(__dirname, './build'),
+        filename: 'bundle.js',
+        module: true,
+        library: {
+            type: "module",
+        }
+    },
+    plugins: [
+        new SpinSdkPlugin()
     ],
-  },
-  resolve: {
-    extensions: ['.tsx', '.ts', '.js'],
-  },
-  output: {
-    path: path.resolve(__dirname, './'),
-    filename: 'dist.js',
-    module: true,
-    library: {
-      type: 'module',
+    optimization: {
+        minimize: false
     },
-  },
-  plugins: [new SpinSdkPlugin()],
-  optimization: {
-    minimize: false,
-  },
-};
+};