fresh
HTTP response freshness tester for Deno. Code ported from https://github.com/jshttp/fresh.
API
import fresh from "https://deno.land/x/fresh/mod.ts";fresh( reqHeaders, resHeaders )
Verifies if a browsers cache could be considered fresh.
Returns: A boolean indicating if the request has a fresh cache of the response.
Parameters
reqHeaders {Headers}- Headers from the server request.resHeaders {Headers}- Headers from the server response.
Examples
import { serve } from "https://deno.land/std/http/server.ts";
import fresh from "https://deno.land/x/fresh/mod.ts";
const server = serve({ port: 3000 });
console.log("Server listening on port 3000");
for await (const req of server) {
const res = {
status: 404,
headers: new Headers({
"ETag": '"ABC"',
"Content-Type": "text/plain",
}),
body: '',
};
// If browser already has a matching etag it should render from client cache
if (fresh(req.headers, res.headers)) {
res.status = 304;
console.log('fresh request');
} else {
res.status = 200;
res.body = "Hello world, this should be cached";
console.log('stale request');
}
req.respond(res);
}
Testing
$ deno test