feat(proxy): add remix-run support (#82)

libs/proxy/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@fal-ai/serverless-proxy",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "license": "MIT",
   "repository": {
     "type": "git",
@@ -20,6 +20,7 @@
     ".": "./src/index.js",
     "./express": "./src/express.js",
     "./nextjs": "./src/nextjs.js",
+    "./remix": "./src/remix.js",
     "./svelte": "./src/svelte.js"
   },
   "typesVersions": {
@@ -30,6 +31,9 @@
       "nextjs": [
         "src/nextjs.d.ts"
       ],
+      "remix": [
+        "src/remix.d.ts"
+      ],
       "svelte": [
         "src/svelte.d.ts"
       ]
@@ -38,13 +42,17 @@
   "main": "./src/index.js",
   "types": "./src/index.d.ts",
   "peerDependencies": {
+    "@remix-run/dev": "^2.0.0",
     "@sveltejs/kit": "^2.0.0",
     "express": "^4.0.0",
     "next": "13.4 - 14",
     "react": "^18.0.0",
     "react-dom": "^18.0.0"
   },
   "peerDependenciesMeta": {
+    "@remix-run/dev": {
+      "optional": true
+    },
     "@sveltejs/kit": {
       "optional": true
     },

libs/proxy/src/index.ts

@@ -136,3 +136,5 @@ export function fromHeaders(
 }
 
 export const responsePassthrough = (res: Response) => Promise.resolve(res);
+
+export const resolveApiKeyFromEnv = () => Promise.resolve(getFalKey());

libs/proxy/src/remix.ts

@@ -0,0 +1,58 @@
+import type {
+  ActionFunction,
+  ActionFunctionArgs,
+  LoaderFunction,
+  LoaderFunctionArgs,
+  json as jsonFunction,
+} from "@remix-run/node";
+import {
+  fromHeaders,
+  handleRequest,
+  resolveApiKeyFromEnv,
+  responsePassthrough,
+} from "./index";
+
+export type FalRemixProxy = {
+  action: ActionFunction;
+  loader: LoaderFunction;
+};
+
+export type FalRemixProxyOptions = {
+  /**
+   * The reference to the `json` function from the Remix runtime.
+   * e.g. `import { json } from "@remix-run/node";`
+   */
+  json: typeof jsonFunction;
+  /**
+   * A function to resolve the API key used by the proxy.
+   * By default, it uses the `FAL_KEY` environment variable.
+   */
+  resolveApiKey?: () => Promise<string | undefined>;
+};
+
+export function createProxy({
+  json,
+  resolveApiKey = resolveApiKeyFromEnv,
+}: FalRemixProxyOptions): FalRemixProxy {
+  const proxy = async ({
+    request,
+  }: ActionFunctionArgs | LoaderFunctionArgs) => {
+    const responseHeaders = new Headers();
+    return handleRequest({
+      id: "remix",
+      method: request.method,
+      respondWith: (status, data) =>
+        json(data, { status, headers: responseHeaders }),
+      getHeaders: () => fromHeaders(request.headers),
+      getHeader: (name) => request.headers.get(name),
+      sendHeader: (name, value) => responseHeaders.set(name, value),
+      getRequestBody: async () => JSON.stringify(await request.json()),
+      sendResponse: responsePassthrough,
+      resolveApiKey,
+    });
+  };
+  return {
+    action: proxy,
+    loader: proxy,
+  };
+}

libs/proxy/tsconfig.json

@@ -2,6 +2,10 @@
   "extends": "../../tsconfig.base.json",
   "files": [],
   "include": [],
+  "compilerOptions": {
+    "target": "ES2020",
+    "importHelpers": false
+  },
   "references": [
     {
       "path": "./tsconfig.lib.json"