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denoland-deno/runtime/js/40_read_file.js

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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
const core = globalThis.Deno.core;
const ops = core.ops;
import { pathFromURL } from "internal:runtime/js/06_util.js";
import * as abortSignal from "internal:ext/web/03_abort_signal.js";
function readFileSync(path) {
return ops.op_readfile_sync(pathFromURL(path));
}
async function readFile(path, options) {
let cancelRid;
let abortHandler;
if (options?.signal) {
options.signal.throwIfAborted();
cancelRid = ops.op_cancel_handle();
abortHandler = () => core.tryClose(cancelRid);
options.signal[abortSignal.add](abortHandler);
}
try {
const read = await core.opAsync(
"op_readfile_async",
pathFromURL(path),
cancelRid,
);
return read;
} finally {
if (options?.signal) {
options.signal[abortSignal.remove](abortHandler);
// always throw the abort error when aborted
options.signal.throwIfAborted();
}
}
}
function readTextFileSync(path) {
return ops.op_readfile_text_sync(pathFromURL(path));
}
async function readTextFile(path, options) {
let cancelRid;
let abortHandler;
if (options?.signal) {
options.signal.throwIfAborted();
cancelRid = ops.op_cancel_handle();
abortHandler = () => core.tryClose(cancelRid);
options.signal[abortSignal.add](abortHandler);
}
try {
const read = await core.opAsync(
"op_readfile_text_async",
pathFromURL(path),
cancelRid,
);
return read;
} finally {
if (options?.signal) {
options.signal[abortSignal.remove](abortHandler);
// always throw the abort error when aborted
options.signal.throwIfAborted();
}
}
}
export { readFile, readFileSync, readTextFile, readTextFileSync };