Cloudflare image worker

worker.js

const OCI_REGION = "me-riyadh-1";
const OCI_NAMESPACE = "YOUR_NAMESPACE";
const OCI_BUCKET = "YOUR_BUCKET";

export default {
  async fetch(request) {
    const url = new URL(request.url);

    if (request.method !== "GET" && request.method !== "HEAD") {
      return new Response("Method not allowed", {
        status: 405,
        headers: {
          Allow: "GET, HEAD",
        },
      });
    }

    const objectName = decodeURIComponent(
      url.pathname.replace(/^\/+/, "")
    );

    if (!objectName) {
      return new Response("Not found", {
        status: 404,
      });
    }

    const encodedObjectName = objectName
      .split("/")
      .map(segment => encodeURIComponent(segment))
      .join("/");

    const originUrl = new URL(
      `https://objectstorage.${OCI_REGION}.oraclecloud.com`
    );

    originUrl.pathname =
      `/n/${OCI_NAMESPACE}` +
      `/b/${OCI_BUCKET}` +
      `/o/${encodedObjectName}`;

    const originResponse = await fetch(originUrl.toString(), {
      method: request.method,
      cf: {
        cacheEverything: true,
        cacheTtlByStatus: {
          "200-299": 604800,
          "404": 60,
          "500-599": 0,
        },
      },
    });

    const response = new Response(
      originResponse.body,
      originResponse
    );

    // Don't leak OCI-specific headers.
    response.headers.delete("opc-request-id");

    if (originResponse.ok) {
      response.headers.set(
        "Cache-Control",
        "public, max-age=86400, s-maxage=604800, stale-while-revalidate=86400"
      );
    }

    return response;
  },
};