Headers utility collection.
Check two Headers field name and field value equality.
import { equalsHeaders } from "https://deno.land/x/headers_utils@$VERSION/equal.ts";
import { assert, assertFalse } from "https://deno.land/std/testing/asserts.ts";
assert(equalsHeaders(new Headers({ a: "b" }), new Headers({ a: "b" })));
assertFalse(equalsHeaders(new Headers({ a: "b" }), new Headers({ c: "d" })));Returns a new Headers with all entries of the given headers except the ones
that do not match the given predicate.
import { filterHeadersEntries } from "https://deno.land/x/headers_utils@$VERSION/filter_entries.ts";
import { assert, assertFalse } from "https://deno.land/std/testing/asserts.ts";
declare const isIMFDate: (input: string) => boolean;
const headers = filterHeadersEntries(
new Headers({
"date": "<date>",
"content-type": "<content-type>",
}),
([key, value]) => isIMFDate(value),
);
assert(headers.has("date"));
assert(headers.has("content-type"));Returns a new Headers with all entries of the given headers except the ones
that have a key(field name) that does not match the given predicate.
import { filterHeadersKeys } from "https://deno.land/x/headers_utils@$VERSION/filter_keys.ts";
import { assert, assertFalse } from "https://deno.land/std/testing/asserts.ts";
const headers = filterHeadersKeys(
new Headers({
"date": "<date>",
"content-type": "<content-type>",
}),
(key) => key.startsWith("content"),
);
assert(headers.has("content-type"));
assertFalse(headers.has("date"));Returns a new Headers with all entries of the given headers except the ones
that have a value(field value) that does not match the given predicate.
import { filterHeadersValues } from "https://deno.land/x/headers_utils@$VERSION/filter_values.ts";
import { assert, assertFalse } from "https://deno.land/std/testing/asserts.ts";
declare const isIMFDate: (input: string) => boolean;
const headers = filterHeadersValues(
new Headers({
"date": "<date>",
"content-type": "<content-type>",
}),
isIMFDate,
);
assert(headers.has("date"));
assertFalse(headers.has("content-type"));Whether the input is Headers or not.
import { isHeaders } from "https://deno.land/x/headers_utils@$VERSION/is.ts";
import { assert, assertFalse } from "https://deno.land/std/testing/asserts.ts";
assert(isHeaders(new Headers()));
assertFalse(isHeaders({}));Serialize Headers into string.
import { stringifyHeaders } from "https://deno.land/x/headers_utils@$VERSION/stringify.ts";
import { assertEquals } from "https://deno.land/std/testing/asserts.ts";
assertEquals(stringifyHeaders(new Headers()), "");
assertEquals(
stringifyHeaders(
new Headers({
"content-type": "text/plain",
"date": "Wed, 21 Oct 2015 07:28:00 GMT",
}),
),
`content-type: text/plain
date: Wed, 21 Oct 2015 07:28:00 GMT`,
);All APIs can be found in the deno doc.
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