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feat: verify Cloudflare R2 setup (#24)
* feat: verify Cloudflare R2 setup - Created R2 test API endpoints for GET/POST/DELETE operations - Added R2Test component for UI testing - Documented R2 setup process and troubleshooting - Extended CloudflareEnv interface for GHOSTPASTE_BUCKET binding - Tested both text and binary data operations 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: initialize Cloudflare context for local development - Added initOpenNextCloudflareForDev to next.config.ts - Updated R2_SETUP.md with development mode instructions - Fixes R2 access in npm run dev mode 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: handle non-serializable objects in R2 test endpoints - Convert Date objects to ISO strings for JSON serialization - Improve error message handling with proper type checking - Ensure all response data is serializable 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: simplify R2 test response to avoid serialization issues - Remove metadata from response to avoid non-POJO serialization - Add debug logging to identify problematic objects - Use spread operator to ensure plain object for customMetadata 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: completely rewrite R2 test with minimal serializable responses - Remove all complex objects and metadata from responses - Simplify to basic success/failure messages - Ensure all returned data is primitive types only - Add nested try-catch for better error isolation 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: properly type CloudflareEnv without extending global interface - Use intersection type (CloudflareEnv & Env) for proper typing - Remove global interface extension as it's not needed - Maintain type safety for R2 bucket binding 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: use proper wrangler types generation for CloudflareEnv - Run wrangler types with --env-interface CloudflareEnv flag - Remove manual type casting as CloudflareEnv now includes our bindings - Update npm script to always use the correct flag - Follow @opennextjs/cloudflare documentation best practices 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <claude@ghostpaste.dev> Co-Authored-By: Claude <claude@ghostpaste.dev> * docs: update CLAUDE.md with project-specific email for commit attribution Co-Authored-By: Claude <claude@ghostpaste.dev> * fix: remove edge runtime export from R2 test route OpenNext requires edge runtime functions to be in separate files. All API routes run on edge runtime by default with @opennextjs/cloudflare. Co-Authored-By: Claude <claude@ghostpaste.dev> --------- Co-authored-by: Claude <claude@ghostpaste.dev>
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‎CLAUDE.md

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@@ -81,6 +81,14 @@ For detailed architecture, API specs, and data models, refer to `docs/SPEC.md`.
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- Prefer rebase over merge to keep history clean
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- Always pull latest changes from `main` before starting new work
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### Commit Attribution
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When attributing commits to Claude, use:
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```
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Co-Authored-By: Claude <claude@ghostpaste.dev>
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```
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## Project Management
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### GitHub Project

‎app/api/r2-test/route.ts

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import { NextRequest, NextResponse } from "next/server";
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import { getCloudflareContext } from "@opennextjs/cloudflare";
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export async function GET() {
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try {
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const { env } = await getCloudflareContext({ async: true });
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const bucket = env.GHOSTPASTE_BUCKET;
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if (!bucket) {
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return NextResponse.json(
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{ error: "R2 bucket binding not found" },
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{ status: 500 }
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);
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}
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// Simple list operation
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try {
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const objects = await bucket.list({ limit: 10 });
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return NextResponse.json({
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success: true,
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message: "R2 bucket is accessible",
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objectCount: objects.objects.length,
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});
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} catch (listError) {
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return NextResponse.json({
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success: false,
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message: "R2 bucket exists but list failed",
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error: String(listError),
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});
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}
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} catch (error) {
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console.error("R2 test error:", error);
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return NextResponse.json(
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{
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error: "Failed to access R2 bucket",
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details: error instanceof Error ? error.message : "Unknown error",
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},
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{ status: 500 }
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);
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}
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}
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export async function POST(_request: NextRequest) {
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try {
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const { env } = await getCloudflareContext({ async: true });
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const bucket = env.GHOSTPASTE_BUCKET;
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if (!bucket) {
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return NextResponse.json(
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{ error: "R2 bucket binding not found" },
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{ status: 500 }
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);
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}
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// Simple write test
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const testKey = `test-${Date.now()}.txt`;
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const testData = "Hello from GhostPaste R2 test!";
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try {
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await bucket.put(testKey, testData);
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// Verify write by reading back
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const object = await bucket.get(testKey);
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if (!object) {
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return NextResponse.json({
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success: false,
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message: "Write succeeded but read failed",
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key: testKey,
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});
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}
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const readData = await object.text();
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return NextResponse.json({
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success: true,
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message: "R2 write/read test successful",
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key: testKey,
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matches: readData === testData,
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});
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} catch (writeError) {
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return NextResponse.json({
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success: false,
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message: "R2 write operation failed",
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error: String(writeError),
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});
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}
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} catch (error) {
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console.error("R2 test error:", error);
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return NextResponse.json(
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{
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error: "Failed to test R2 operations",
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details: error instanceof Error ? error.message : "Unknown error",
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},
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{ status: 500 }
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);
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}
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}
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export async function DELETE(request: NextRequest) {
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try {
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const { env } = await getCloudflareContext({ async: true });
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const bucket = env.GHOSTPASTE_BUCKET;
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if (!bucket) {
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return NextResponse.json(
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{ error: "R2 bucket binding not found" },
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{ status: 500 }
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);
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}
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const { searchParams } = new URL(request.url);
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const key = searchParams.get("key");
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if (!key) {
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return NextResponse.json(
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{ error: "Key parameter is required" },
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{ status: 400 }
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);
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}
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try {
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await bucket.delete(key);
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return NextResponse.json({
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success: true,
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message: `Object '${key}' deleted successfully`,
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});
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} catch (deleteError) {
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return NextResponse.json({
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success: false,
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message: "R2 delete operation failed",
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error: String(deleteError),
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});
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}
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} catch (error) {
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console.error("R2 delete error:", error);
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return NextResponse.json(
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{
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error: "Failed to delete from R2",
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details: error instanceof Error ? error.message : "Unknown error",
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},
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{ status: 500 }
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);
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}
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}

‎app/page.tsx

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import { ThemeToggle } from "@/components/theme-toggle";
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import { R2Test } from "@/components/r2-test";
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export default function Home() {
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return (
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</p>
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</div>
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</div>
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<div className="bg-card text-card-foreground mt-8 rounded-lg border p-6 shadow-sm">
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<h3 className="mb-4 text-xl font-semibold">R2 Bucket Test</h3>
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<R2Test />
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</div>
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</main>
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</div>
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);

‎components/r2-test.tsx

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"use client";
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import { useState } from "react";
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import { Button } from "@/components/ui/button";
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export function R2Test() {
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const [result, setResult] = useState<string>("");
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const [loading, setLoading] = useState(false);
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const testR2Access = async () => {
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setLoading(true);
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try {
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const response = await fetch("/api/r2-test");
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const data = await response.json();
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setResult(JSON.stringify(data, null, 2));
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} catch (error) {
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setResult(`Error: ${error}`);
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}
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setLoading(false);
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};
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const testR2Write = async () => {
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setLoading(true);
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try {
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const response = await fetch("/api/r2-test", {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({
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key: `test-${Date.now()}`,
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data: "Test data from UI",
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}),
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});
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const data = await response.json();
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setResult(JSON.stringify(data, null, 2));
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} catch (error) {
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setResult(`Error: ${error}`);
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}
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setLoading(false);
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};
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return (
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<div className="space-y-4">
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<div className="flex gap-4">
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<Button onClick={testR2Access} disabled={loading}>
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Test R2 Access
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</Button>
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<Button onClick={testR2Write} disabled={loading}>
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Test R2 Write
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</Button>
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</div>
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{result && (
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<pre className="bg-muted overflow-auto rounded-lg p-4 text-sm">
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{result}
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</pre>
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)}
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</div>
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);
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}

‎docs/R2_SETUP.md

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# Cloudflare R2 Setup Guide
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This guide documents the R2 setup process for GhostPaste.
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## Prerequisites
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- Cloudflare account with R2 access
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- Wrangler CLI installed (`npm install -g wrangler`)
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- Account ID set in environment or wrangler.toml
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## R2 Bucket Configuration
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### Bucket Details
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- **Bucket Name:** `ghostpaste-bucket`
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- **Binding Name:** `GHOSTPASTE_BUCKET`
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- **Created:** 2025-06-05
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### Setup Steps
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1. **Create R2 Bucket** (if not exists):
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```bash
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export CLOUDFLARE_ACCOUNT_ID=your-account-id
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npx wrangler r2 bucket create ghostpaste-bucket
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```
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2. **Configure Binding** in `wrangler.toml`:
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```toml
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[[r2_buckets]]
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binding = "GHOSTPASTE_BUCKET"
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bucket_name = "ghostpaste-bucket"
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```
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3. **Access in Code**:
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```typescript
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import { getCloudflareContext } from "@opennextjs/cloudflare";
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const { env } = await getCloudflareContext({ async: true });
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const bucket = env.GHOSTPASTE_BUCKET as R2Bucket;
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```
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## Testing R2 Access
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### Test Endpoints
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The `/api/r2-test` endpoint provides the following operations:
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- **GET** - List bucket contents and verify access
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- **POST** - Test read/write operations with text and binary data
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- **DELETE** - Test object deletion (requires `?key=objectKey`)
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### Local Development
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For R2 access in development, you have two options:
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1. **Using Next.js dev server** (recommended for development):
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```bash
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npm run dev
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```
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The Next.js config automatically initializes Cloudflare bindings in development mode.
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2. **Using Wrangler preview** (tests actual Workers runtime):
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```bash
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npm run preview
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```
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This runs the application with the full Cloudflare Workers runtime.
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### Test Commands
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```bash
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# Test bucket access
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curl http://localhost:8788/api/r2-test
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# Test write operations
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curl -X POST http://localhost:8788/api/r2-test \
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-H "Content-Type: application/json" \
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-d '{"key": "test-file", "data": "Hello, R2!"}'
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# Test delete operation
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curl -X DELETE "http://localhost:8788/api/r2-test?key=test-file"
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```
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## Storage Structure
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GhostPaste will use the following R2 object structure:
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```
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metadata/{gistId}.json # Unencrypted metadata
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blobs/{gistId}.bin # Encrypted binary data
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```
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## Important Notes
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1. **Bindings Required**: R2 access only works in the Cloudflare Workers runtime
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2. **Local Testing**: Use `npm run preview` (not `npm run dev`) to test R2 locally
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3. **Error Handling**: Always check if bucket binding exists before operations
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4. **Binary Data**: R2 supports both text and binary data (ArrayBuffer, Uint8Array)
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## Troubleshooting
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### Common Issues
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1. **"R2 bucket binding not found"**
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- Ensure you're running with `npm run preview` (not `npm run dev`)
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- Check wrangler.toml has correct bucket configuration
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2. **"Account ID not found"**
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- Set `CLOUDFLARE_ACCOUNT_ID` environment variable
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- Or add `account_id` to wrangler.toml
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3. **"Bucket already exists"**
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- This is fine - the bucket is already created
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- Use `wrangler r2 bucket list` to verify
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## Security Considerations
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- Never expose R2 operations directly to users
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- Always validate and sanitize object keys
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- Implement proper access controls in API routes
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- Use appropriate content types for stored data

‎next.config.ts

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import type { NextConfig } from "next";
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import { initOpenNextCloudflareForDev } from "@opennextjs/cloudflare";
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// Initialize Cloudflare bindings for local development
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if (process.env.NODE_ENV === "development") {
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initOpenNextCloudflareForDev();
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}
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const nextConfig: NextConfig = {
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// Disable image optimization (not supported on Edge Runtime)

‎package.json

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"cf:build": "npx @opennextjs/cloudflare build",
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"preview": "npm run cf:build && wrangler dev",
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"deploy": "npm run cf:build && wrangler deploy",
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"cf:typegen": "wrangler types",
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"cf:typegen": "wrangler types --env-interface CloudflareEnv",
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"prepare": "husky",
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"test": "vitest",
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"test:ui": "vitest --ui",

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