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std/node/_fs/_fs_writeFile.ts

Deno standard library
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.import { Encodings, notImplemented } from "../_utils.ts";import { fromFileUrl } from "../path.ts";import { Buffer } from "../buffer.ts";import { CallbackWithError, checkEncoding, getEncoding, getOpenOptions, isFileOptions, WriteFileOptions,} from "./_fs_common.ts";
export function writeFile( pathOrRid: string | number | URL, data: string | Uint8Array, optOrCallback: Encodings | CallbackWithError | WriteFileOptions | undefined, callback?: CallbackWithError,): void { const callbackFn: CallbackWithError | undefined = optOrCallback instanceof Function ? optOrCallback : callback; const options: Encodings | WriteFileOptions | undefined = optOrCallback instanceof Function ? undefined : optOrCallback;
if (!callbackFn) { throw new TypeError("Callback must be a function."); }
pathOrRid = pathOrRid instanceof URL ? fromFileUrl(pathOrRid) : pathOrRid;
const flag: string | undefined = isFileOptions(options) ? options.flag : undefined;
const mode: number | undefined = isFileOptions(options) ? options.mode : undefined;
const encoding = checkEncoding(getEncoding(options)) || "utf8"; const openOptions = getOpenOptions(flag || "w");
if (typeof data === "string") data = Buffer.from(data, encoding);
const isRid = typeof pathOrRid === "number"; let file;
let error: Error | null = null; (async (): Promise<void> => { try { file = isRid ? new Deno.File(pathOrRid as number) : await Deno.open(pathOrRid as string, openOptions);
if (!isRid && mode) { if (Deno.build.os === "windows") notImplemented(`"mode" on Windows`); await Deno.chmod(pathOrRid as string, mode); }
await Deno.writeAll(file, data as Uint8Array); } catch (e) { error = e; } finally { // Make sure to close resource if (!isRid && file) file.close(); callbackFn(error); } })();}
export function writeFileSync( pathOrRid: string | number | URL, data: string | Uint8Array, options?: Encodings | WriteFileOptions,): void { pathOrRid = pathOrRid instanceof URL ? fromFileUrl(pathOrRid) : pathOrRid;
const flag: string | undefined = isFileOptions(options) ? options.flag : undefined;
const mode: number | undefined = isFileOptions(options) ? options.mode : undefined;
const encoding = checkEncoding(getEncoding(options)) || "utf8"; const openOptions = getOpenOptions(flag || "w");
if (typeof data === "string") data = Buffer.from(data, encoding);
const isRid = typeof pathOrRid === "number"; let file;
let error: Error | null = null; try { file = isRid ? new Deno.File(pathOrRid as number) : Deno.openSync(pathOrRid as string, openOptions);
if (!isRid && mode) { if (Deno.build.os === "windows") notImplemented(`"mode" on Windows`); Deno.chmodSync(pathOrRid as string, mode); }
Deno.writeAllSync(file, data as Uint8Array); } catch (e) { error = e; } finally { // Make sure to close resource if (!isRid && file) file.close();
if (error) throw error; }}