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denoland-deno/ext/node/polyfills/internal/streams/add-abort-signal.mjs
Bartek Iwańczuk d47147fb6a
feat(ext/node): embed std/node into the snapshot (#17724)
This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from 
"https://deno.land/std/node" (or from the location specified by 
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow 
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
2023-02-14 17:38:45 +01:00

48 lines
1.5 KiB
JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// deno-lint-ignore-file
import { AbortError, ERR_INVALID_ARG_TYPE } from "internal:deno_node/polyfills/internal/errors.ts";
import eos from "internal:deno_node/polyfills/internal/streams/end-of-stream.mjs";
// This method is inlined here for readable-stream
// It also does not allow for signal to not exist on the stream
// https://github.com/nodejs/node/pull/36061#discussion_r533718029
const validateAbortSignal = (signal, name) => {
if (
typeof signal !== "object" ||
!("aborted" in signal)
) {
throw new ERR_INVALID_ARG_TYPE(name, "AbortSignal", signal);
}
};
function isStream(obj) {
return !!(obj && typeof obj.pipe === "function");
}
function addAbortSignal(signal, stream) {
validateAbortSignal(signal, "signal");
if (!isStream(stream)) {
throw new ERR_INVALID_ARG_TYPE("stream", "stream.Stream", stream);
}
return addAbortSignalNoValidate(signal, stream);
}
function addAbortSignalNoValidate(signal, stream) {
if (typeof signal !== "object" || !("aborted" in signal)) {
return stream;
}
const onAbort = () => {
stream.destroy(new AbortError());
};
if (signal.aborted) {
onAbort();
} else {
signal.addEventListener("abort", onAbort);
eos(stream, () => signal.removeEventListener("abort", onAbort));
}
return stream;
}
export default { addAbortSignal, addAbortSignalNoValidate };
export { addAbortSignal, addAbortSignalNoValidate };