35 lines
1.1 KiB
TypeScript
35 lines
1.1 KiB
TypeScript
import { ensureFile } from "$std/fs/ensure_file.ts";
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/**
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*
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* @param src url of file
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* @param dest destination file. If `useFileName` is true, this should be the destination directory
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* @param [useFileName] whether to use the inferred file name from `src`
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*/
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export async function downloadFile(src: string, dest: string, useFileName?:boolean) {
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if (!(src.startsWith("http://") || src.startsWith("https://"))) {
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throw new TypeError("URL must start with be http:// or https://");
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}
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const fileName = src.split('/').at(-1);
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const resp = await fetch(src);
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if (!resp.ok) {
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throw new Deno.errors.BadResource(
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`Request failed with status ${resp.status}`,
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);
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} else if (!resp.body) {
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throw new Deno.errors.UnexpectedEof(
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`The download url ${src} doesn't contain a file to download`,
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);
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} else if (resp.status === 404) {
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throw new Deno.errors.NotFound(
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`The requested url "${src}" could not be found`,
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);
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}
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await ensureFile(useFileName ? dest + fileName : dest);
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const file = await Deno.open(dest, { truncate: true, write: true });
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resp.body.pipeTo(file.writable);
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} |