export default {  async fetch(request, env, ctx): Promise<Response> {    await env.KV.put('KEY', 'VALUE');    const value = await env.KV.get('KEY');    const allKeys = await env.KV.list();    await env.KV.delete('KEY');
    return new Response(      JSON.stringify({        value: value,        allKeys: allKeys,      }),    );  },};

export default {  async fetch(request, env) {    // Get the entire A/B test configuration object from KV    const config = await env.CONFIG_STORE.get('homepage-test', 'json');
    // Assign user to a group (e.g., based on a cookie or URL)    const group = request.headers.get('X-User-Group') || 'control';
    // Return the specific configuration for the user's group    const variantData = config[group] || config.control;    return new Response(JSON.stringify(variantData), {      headers: { 'content-type': 'application/json' },    });  },} satisfies ExportedHandler<Env>;

export default {  async fetch(request, env) {    // Get Authorization key from request headers    const apiKey = request.headers.get('Authorization')?.replace('Bearer ', '');
    if (!apiKey) {      return new Response('Authorization header missing', { status: 401 });    }
    // Check if the API key is valid and get associated metadata    const keyData = await env.API_KEYS.get(apiKey, 'json');
    if (keyData && keyData.enabled) {      // Key is valid, add user info to the request and fetch the origin      const newHeaders = new Headers(request.headers);      newHeaders.set('X-User-ID', keyData.userId);      return fetch(request, { headers: newHeaders });    }
    return new Response('Invalid API Key', { status: 403 });  },} satisfies ExportedHandler<Env>;

export default {  async fetch(request, env) {    const url = new URL(request.url);    const path = url.pathname; // e.g., "/api/users"
    // Look up the path prefix (e.g., "/api") to find the correct origin hostname    const pathPrefix = '/' + path.split('/')[1];    const originHostname = await env.ROUTING_RULES.get(pathPrefix);
    if (originHostname) {      // Construct the new URL for the backend service      const newUrl = new URL(url);      newUrl.hostname = originHostname;
      // Act as a reverse proxy: fetch the content from the backend      // and return it to the original client.      return fetch(newUrl.toString(), request);    }
    // If no route matches, return a 404 or forward to a default origin    return new Response('Service not found for this path', { status: 404 });  },} satisfies ExportedHandler<Env>;