initial commit for proxy-bun

2026-05-07 18:42:09 +07:00
commit a4fcbbcca9
10 changed files with 601 additions and 0 deletions
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 # dependencies (bun install)
 node_modules
 # output
 out
 dist
 *.tgz
 # code coverage
 coverage
 *.lcov
 # logs
 logs
 _.log
 report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 # dotenv environment variable files
 .env
 .env.development.local
 .env.test.local
 .env.production.local
 .env.local
 # caches
 .eslintcache
 .cache
 *.tsbuildinfo
 # IntelliJ based IDEs
 .idea
 # Finder (MacOS) folder config
 .DS_Store
@@ -0,0 +1,106 @@
 Default to using Bun instead of Node.js.
 - Use `bun <file>` instead of `node <file>` or `ts-node <file>`
 - Use `bun test` instead of `jest` or `vitest`
 - Use `bun build <file.html|file.ts|file.css>` instead of `webpack` or `esbuild`
 - Use `bun install` instead of `npm install` or `yarn install` or `pnpm install`
 - Use `bun run <script>` instead of `npm run <script>` or `yarn run <script>` or `pnpm run <script>`
 - Use `bunx <package> <command>` instead of `npx <package> <command>`
 - Bun automatically loads .env, so don't use dotenv.
 ## APIs
 - `Bun.serve()` supports WebSockets, HTTPS, and routes. Don't use `express`.
 - `bun:sqlite` for SQLite. Don't use `better-sqlite3`.
 - `Bun.redis` for Redis. Don't use `ioredis`.
 - `Bun.sql` for Postgres. Don't use `pg` or `postgres.js`.
 - `WebSocket` is built-in. Don't use `ws`.
 - Prefer `Bun.file` over `node:fs`'s readFile/writeFile
 - Bun.$`ls` instead of execa.
 ## Testing
 Use `bun test` to run tests.
 ```ts#index.test.ts
 import { test, expect } from "bun:test";
 test("hello world", () => {
  expect(1).toBe(1);
 });
 ```
 ## Frontend
 Use HTML imports with `Bun.serve()`. Don't use `vite`. HTML imports fully support React, CSS, Tailwind.
 Server:
 ```ts#index.ts
 import index from "./index.html"
 Bun.serve({
  routes: {
    "/": index,
    "/api/users/:id": {
      GET: (req) => {
        return new Response(JSON.stringify({ id: req.params.id }));
      },
    },
  },
  // optional websocket support
  websocket: {
    open: (ws) => {
      ws.send("Hello, world!");
    },
    message: (ws, message) => {
      ws.send(message);
    },
    close: (ws) => {
      // handle close
    }
  },
  development: {
    hmr: true,
    console: true,
  }
 })
 ```
 HTML files can import .tsx, .jsx or .js files directly and Bun's bundler will transpile & bundle automatically. `<link>` tags can point to stylesheets and Bun's CSS bundler will bundle.
 ```html#index.html
 <html>
  <body>
    <h1>Hello, world!</h1>
    <script type="module" src="./frontend.tsx"></script>
  </body>
 </html>
 ```
 With the following `frontend.tsx`:
 ```tsx#frontend.tsx
 import React from "react";
 import { createRoot } from "react-dom/client";
 // import .css files directly and it works
 import './index.css';
 const root = createRoot(document.body);
 export default function Frontend() {
  return <h1>Hello, world!</h1>;
 }
 root.render(<Frontend />);
 ```
 Then, run index.ts
 ```sh
 bun --hot ./index.ts
 ```
 For more information, read the Bun API docs in `node_modules/bun-types/docs/**.mdx`.
@@ -0,0 +1,74 @@
 # Edge Relay
 HTTP proxy untuk Vercel Edge Runtime.
 ## Cara Pakai
 ### Header yang Dibutuhkan
 | Header | Required | Default | Deskripsi |
 |--------|----------|---------|-----------|
 | `x-relay-target` | Yes | - | URL target yang ingin di-proxy |
 | `x-relay-path` | No | `/` | Path yang ditambahkan ke target |
 ### Contoh
 ```bash
 # Proxy ke httpbin.org/get
 curl -H "x-relay-target: https://httpbin.org" https://your-edge-function.vercel.app
 # Proxy ke endpoint spesifik
 curl -H "x-relay-target: https://api.example.com" \
     -H "x-relay-path: /v1/users" \
     https://your-edge-function.vercel.app
 ```
 ### HTTP Methods
 Mendukung semua HTTP methods:
 - `GET`, `HEAD` - tanpa body
 - `POST`, `PUT`, `PATCH`, `DELETE` - dengan body
 ### Header Handling
 Relay headers yang di-strip sebelum forwarded:
 - `x-relay-target`
 - `x-relay-path`
 - `host`
 Headers lain tetap di-pass.
 ### Error Handling
 ```json
 {
  "error": "Missing x-relay-target header"
 }
 ```
 HTTP 400 jika `x-relay-target` tidak ada.
 ## Struktur Kode
 ```
 proxy-vercel/
 ├── index.ts        # Edge handler
 ├── relay-utils.ts  # Pure functions untuk relay logic
 └── index.test.ts   # Unit tests
 ```
 ### relay-utils.ts
 | Function | Deskripsi |
 |----------|-----------|
 | `normalizeTargetUrl(target, path)` | Gabung target + path, hapus trailing slash |
 | `stripRelayHeaders(headers)` | Hapus relay-specific headers |
 | `shouldSendBody(method)` | Cek apakah method butuh body |
 | `buildRelayRequest(req, url, headers)` | Bangun RequestInit untuk fetch |
 | `createRelayResponse(response)` | Buat Response dari fetch result |
 ## Development
 ```bash
 bun test        # Run tests
 bun run index.ts  # Start local server (untuk manual testing)
 ```
@@ -0,0 +1,26 @@
 {
  "lockfileVersion": 1,
  "configVersion": 1,
  "workspaces": {
    "": {
      "name": "proxy-vercel",
      "devDependencies": {
        "@types/bun": "latest",
      },
      "peerDependencies": {
        "typescript": "^5",
      },
    },
  },
  "packages": {
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    "typescript": ["typescript@5.9.3", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw=="],
    "undici-types": ["undici-types@7.19.2", "", {}, "sha512-qYVnV5OEm2AW8cJMCpdV20CDyaN3g0AjDlOGf1OW4iaDEx8MwdtChUp4zu4H0VP3nDRF/8RKWH+IPp9uW0YGZg=="],
  }
 }
@@ -0,0 +1,251 @@
 import { test, expect, describe } from "bun:test";
 import {
  normalizeTargetUrl,
  stripRelayHeaders,
  shouldSendBody,
  buildRelayRequest,
  createRelayResponse,
 } from "./relay-utils";
 describe("normalizeTargetUrl", () => {
  test("returns null when target is null", () => {
    expect(normalizeTargetUrl(null, "/")).toBeNull();
  });
  test("returns null when target is empty string", () => {
    expect(normalizeTargetUrl("", "/")).toBeNull();
  });
  test("removes trailing slash from target", () => {
    expect(normalizeTargetUrl("https://httpbin.org/", "/get")).toBe("https://httpbin.org/get");
  });
  test("keeps target without trailing slash", () => {
    expect(normalizeTargetUrl("https://httpbin.org", "/get")).toBe("https://httpbin.org/get");
  });
  test("appends relay path", () => {
    expect(normalizeTargetUrl("https://example.com", "/api/users")).toBe("https://example.com/api/users");
  });
  test("handles nested paths", () => {
    expect(normalizeTargetUrl("https://api.example.com", "/v1/users/123/profile")).toBe(
      "https://api.example.com/v1/users/123/profile"
    );
  });
 });
 describe("stripRelayHeaders", () => {
  test("removes x-relay-target header", () => {
    const headers = new Headers({ "x-relay-target": "https://test.com" });
    const stripped = stripRelayHeaders(headers);
    expect(stripped.get("x-relay-target")).toBeNull();
  });
  test("removes x-relay-path header", () => {
    const headers = new Headers({ "x-relay-path": "/test" });
    const stripped = stripRelayHeaders(headers);
    expect(stripped.get("x-relay-path")).toBeNull();
  });
  test("removes host header", () => {
    const headers = new Headers({ host: "localhost:3000" });
    const stripped = stripRelayHeaders(headers);
    expect(stripped.get("host")).toBeNull();
  });
  test("preserves other headers", () => {
    const headers = new Headers({
      "x-relay-target": "https://test.com",
      "x-custom-header": "value",
      authorization: "Bearer token",
    });
    const stripped = stripRelayHeaders(headers);
    expect(stripped.get("x-custom-header")).toBe("value");
    expect(stripped.get("authorization")).toBe("Bearer token");
  });
  test("handles multiple relay headers", () => {
    const headers = new Headers({
      "x-relay-target": "https://test.com",
      "x-relay-path": "/path",
      host: "test.com",
      "content-type": "application/json",
    });
    const stripped = stripRelayHeaders(headers);
    expect(stripped.get("content-type")).toBe("application/json");
    expect(stripped.get("x-relay-target")).toBeNull();
    expect(stripped.get("x-relay-path")).toBeNull();
    expect(stripped.get("host")).toBeNull();
  });
 });
 describe("shouldSendBody", () => {
  test("returns false for GET", () => {
    expect(shouldSendBody("GET")).toBe(false);
  });
  test("returns false for HEAD", () => {
    expect(shouldSendBody("HEAD")).toBe(false);
  });
  test("returns true for POST", () => {
    expect(shouldSendBody("POST")).toBe(true);
  });
  test("returns true for PUT", () => {
    expect(shouldSendBody("PUT")).toBe(true);
  });
  test("returns true for PATCH", () => {
    expect(shouldSendBody("PATCH")).toBe(true);
  });
  test("returns true for DELETE", () => {
    expect(shouldSendBody("DELETE")).toBe(true);
  });
  test("is case-sensitive", () => {
    expect(shouldSendBody("get")).toBe(true);
    expect(shouldSendBody("post")).toBe(true);
  });
 });
 describe("buildRelayRequest", () => {
  test("sets correct method", () => {
    const req = new Request("http://test.com", { method: "POST" });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.method).toBe("POST");
  });
  test("sets headers", () => {
    const req = new Request("http://test.com");
    const headers = new Headers({ "x-custom": "value" });
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.headers).toBe(headers);
  });
  test("omits body for GET", () => {
    const req = new Request("http://test.com", { method: "GET" });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.body).toBeUndefined();
  });
  test("omits body for HEAD", () => {
    const req = new Request("http://test.com", { method: "HEAD" });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.body).toBeUndefined();
  });
  test("includes body for POST", () => {
    const body = JSON.stringify({ test: true });
    const req = new Request("http://test.com", { method: "POST", body });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.body).toBeDefined();
    expect(result.duplex).toBe("half");
  });
  test("includes body for PUT", () => {
    const body = JSON.stringify({ update: true });
    const req = new Request("http://test.com", { method: "PUT", body });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.body).toBeDefined();
  });
  test("includes body for PATCH", () => {
    const body = JSON.stringify({ patch: true });
    const req = new Request("http://test.com", { method: "PATCH", body });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.body).toBeDefined();
  });
  test("includes body for DELETE", () => {
    const body = JSON.stringify({ delete: true });
    const req = new Request("http://test.com", { method: "DELETE", body });
    const headers = new Headers();
    const result = buildRelayRequest(req, "https://test.com", headers);
    expect(result.body).toBeDefined();
  });
 });
 describe("createRelayResponse", () => {
  test("preserves status", async () => {
    const mockResponse = new Response("body", { status: 418 });
    const result = createRelayResponse(mockResponse);
    expect(result.status).toBe(418);
  });
  test("preserves headers", async () => {
    const mockResponse = new Response("body", {
      headers: { "x-custom": "value" },
    });
    const result = createRelayResponse(mockResponse);
    expect(result.headers.get("x-custom")).toBe("value");
  });
  test("preserves body", async () => {
    const mockResponse = new Response("test body content");
    const result = createRelayResponse(mockResponse);
    expect(await result.text()).toBe("test body content");
  });
  test("handles different status codes", async () => {
    const mockResponse = new Response(null, { status: 404 });
    const result = createRelayResponse(mockResponse);
    expect(result.status).toBe(404);
  });
  test("handles 500 status", async () => {
    const mockResponse = new Response("error", { status: 500 });
    const result = createRelayResponse(mockResponse);
    expect(result.status).toBe(500);
  });
 });
 describe("integration: full relay flow", () => {
  test("complete flow with mocked fetch", async () => {
    const target = "https://httpbin.org";
    const relayPath = "/get";
    const targetUrl = normalizeTargetUrl(target, relayPath);
    expect(targetUrl).toBe("https://httpbin.org/get");
    const originalHeaders = new Headers({
      "x-relay-target": target,
      "x-relay-path": relayPath,
      host: "localhost",
      "x-custom": "preserved",
    });
    const strippedHeaders = stripRelayHeaders(originalHeaders);
    expect(strippedHeaders.get("x-relay-target")).toBeNull();
    expect(strippedHeaders.get("x-relay-path")).toBeNull();
    expect(strippedHeaders.get("host")).toBeNull();
    expect(strippedHeaders.get("x-custom")).toBe("preserved");
  });
  test("POST flow with body preservation", () => {
    const req = new Request("http://test.com", {
      method: "POST",
      body: JSON.stringify({ data: "test" }),
      headers: { "content-type": "application/json" },
    });
    const options = buildRelayRequest(req, "https://api.test.com/endpoint", new Headers());
    expect(options.method).toBe("POST");
    expect(options.body).toBeDefined();
  });
  test("error case: missing target", () => {
    const target = null;
    const relayPath = "/test";
    const result = normalizeTargetUrl(target, relayPath);
    expect(result).toBeNull();
  });
 });
@@ -0,0 +1,27 @@
 import {
  normalizeTargetUrl,
  stripRelayHeaders,
  buildRelayRequest,
  createRelayResponse,
 } from "./relay-utils";
 export const config = { runtime: "edge" };
 export default async function handler(req: Request): Promise<Response> {
  const target = req.headers.get("x-relay-target");
  const relayPath = req.headers.get("x-relay-path") || "/";
  const targetUrl = normalizeTargetUrl(target, relayPath);
  if (!targetUrl) {
    return new Response(JSON.stringify({ error: "Missing x-relay-target header" }), {
      status: 400,
      headers: { "content-type": "application/json" },
    });
  }
  const headers = stripRelayHeaders(new Headers(req.headers));
  const fetchOptions = buildRelayRequest(req, targetUrl, headers);
  const response = await fetch(targetUrl, fetchOptions);
  return createRelayResponse(response);
 }
@@ -0,0 +1,12 @@
 {
  "name": "proxy-vercel",
  "module": "index.ts",
  "type": "module",
  "private": true,
  "devDependencies": {
    "@types/bun": "latest"
  },
  "peerDependencies": {
    "typescript": "^5"
  }
 }
@@ -0,0 +1,40 @@
 export interface RelayOptions {
  stripHeaders?: string[];
 }
 export function normalizeTargetUrl(target: string | null, relayPath: string): string | null {
  if (!target) return null;
  return target.replace(/\/$/, "") + relayPath;
 }
 export function stripRelayHeaders(headers: Headers): Headers {
  const stripped = new Headers(headers);
  stripped.delete("x-relay-target");
  stripped.delete("x-relay-path");
  stripped.delete("host");
  return stripped;
 }
 export function shouldSendBody(method: string): boolean {
  return method !== "GET" && method !== "HEAD";
 }
 export function buildRelayRequest(
  req: Request,
  targetUrl: string,
  headers: Headers
 ): RequestInit {
  return {
    method: req.method,
    headers,
    body: shouldSendBody(req.method) ? req.body : undefined,
    duplex: "half" as const,
  };
 }
 export function createRelayResponse(response: Response): Response {
  return new Response(response.body, {
    status: response.status,
    headers: response.headers,
  });
 }
@@ -0,0 +1,30 @@
 {
  "compilerOptions": {
    // Environment setup & latest features
    "lib": ["ESNext"],
    "target": "ESNext",
    "module": "Preserve",
    "moduleDetection": "force",
    "jsx": "react-jsx",
    "allowJs": true,
    "types": ["bun"],
    // Bundler mode
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "noEmit": true,
    // Best practices
    "strict": true,
    "skipLibCheck": true,
    "noFallthroughCasesInSwitch": true,
    "noUncheckedIndexedAccess": true,
    "noImplicitOverride": true,
    // Some stricter flags (disabled by default)
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "noPropertyAccessFromIndexSignature": false
  }
 }
@@ -0,0 +1 @@
 {"rewrites":[{"source":"/(.*)","destination":"/api/relay"}]}
		`@@ -0,0 +1 @@`
							`{"rewrites":[{"source":"/(.*)","destination":"/api/relay"}]}`