Function eTag

Calculate an ETag for string or Uint8Array entities. This returns a strong tag of the form "<ascii chars>", which guarantees the byte-for-byte equality of the resource.

You can optionally set true to the weak option to get a weak tag.

import { eTag } from "@std/http/etag";
import { assert } from "@std/assert";

const body = "hello deno!";

const etag = await eTag(body);
assert(etag);

const res = new Response(body, { headers: { etag } });
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Calculate an ETag for file information entity. This returns a weak tag of the form W\"<ascii chars>", which guarantees the equivalence of the resource, not the byte-for-byte equality.

import { eTag } from "@std/http/etag";
import { assert } from "@std/assert";

const fileInfo = await Deno.stat("README.md");

const etag = await eTag(fileInfo);
assert(etag);

using file = await Deno.open("README.md");

const res = new Response(file.readable, { headers: { etag } });
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