* JavaScript

  ```js
  export default {
    async fetch(request, env, ctx) {
      const url = "https://jsonplaceholder.typicode.com/todos/1";


      // gatherResponse returns both content-type & response body as a string
      async function gatherResponse(response) {
        const { headers } = response;
        const contentType = headers.get("content-type") || "";
        if (contentType.includes("application/json")) {
          return { contentType, result: JSON.stringify(await response.json()) };
        }
        return { contentType, result: response.text() };
      }


      const response = await fetch(url);
      const { contentType, result } = await gatherResponse(response);


      const options = { headers: { "content-type": contentType } };
      return new Response(result, options);
    },
  };
  ```

* TypeScript

  ```ts
  interface Env {}
  export default {
    async fetch(request, env, ctx): Promise<Response> {
      const url = "https://jsonplaceholder.typicode.com/todos/1";


      // gatherResponse returns both content-type & response body as a string
      async function gatherResponse(response) {
        const { headers } = response;
        const contentType = headers.get("content-type") || "";
        if (contentType.includes("application/json")) {
          return { contentType, result: JSON.stringify(await response.json()) };
        }
        return { contentType, result: response.text() };
      }


      const response = await fetch(url);
      const { contentType, result } = await gatherResponse(response);


      const options = { headers: { "content-type": contentType } };
      return new Response(result, options);
    },
  } satisfies ExportedHandler<Env>;
  ```

* Python

  ```py
  from workers import Response, fetch
  import json


  async def on_fetch(request):
      url = "https://jsonplaceholder.typicode.com/todos/1"


      # gather_response returns both content-type & response body as a string
      async def gather_response(response):
          headers = response.headers
          content_type = headers["content-type"] or ""


          if "application/json" in content_type:
              return (content_type, json.dumps(await response.json()))
          return (content_type, await response.text())


      response = await fetch(url)
      content_type, result = await gather_response(response)




      headers = {"content-type": content_type}
      return Response(result, headers=headers)
  ```
