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deno

Deno, why i cannot get custom header

enter image description here

In this picture, I have send Aaaa and MOck-Query-Path, But in m Deno, i cannot get them, why.

Deno.serve(async (req) => {
    console.log(1111,req.headers);
Solution

  • The Deno.serve request object has access to all headers sent in the request, including custom headers. Use the req.headers.get("header-name") function to get the value for a specific header (not case-sensitive).

    If you want an object with all of the headers, Object.fromEntries(req.headers.entries()) - just note the resulting object's keys will be all normalized to lower case values.

    Tested with Deno version 1.38.1

    Deno.serve(async (req) => {
  console.log(req.headers.get("Mock-Query-Path"));
  return new Response(
    JSON.stringify(Object.fromEntries(req.headers.entries())),
  );
});

    Test using curl

    curl localhost:8000 \
  -H "Aaaa: 20231013-direct-mail" \
  -H "Mock-Query-Path: /customer/getCustomerDetails"

    Console Output:

    /customer/getCustomerDetails

    Response

    {
  "aaaa": "20231013-direct-mail",
  "accept": "*/*",
  "host": "localhost:8000",
  "mock-query-path": "/customer/getCustomerDetails",
  "user-agent": "curl/7.81.0"
}