225 lines
5.9 KiB
TypeScript
225 lines
5.9 KiB
TypeScript
import * as fs from "node:fs";
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import { fileURLToPath } from "node:url";
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import { dirname } from "node:path";
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import type Koa from "koa";
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import send from "koa-send";
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import rename from "rename";
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import { serverLogger } from "../index.js";
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import { contentDisposition } from "@/misc/content-disposition.js";
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import { DriveFiles } from "@/models/index.js";
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import { InternalStorage } from "@/services/drive/internal-storage.js";
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import { createTemp } from "@/misc/create-temp.js";
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import { downloadUrl } from "@/misc/download-url.js";
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import { detectType } from "@/misc/get-file-info.js";
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import { convertToWebp } from "@/services/drive/image-processor.js";
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import { GenerateVideoThumbnail } from "@/services/drive/generate-video-thumbnail.js";
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import { StatusError } from "@/misc/fetch.js";
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import { ByteRangeReadable } from "./byte-range-readable.js";
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import { FILE_TYPE_BROWSERSAFE } from "@/const.js";
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import { inspect } from "node:util";
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const _filename = fileURLToPath(import.meta.url);
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const _dirname = dirname(_filename);
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const assets = `${_dirname}/../../server/file/assets/`;
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const MAX_BYTE_RANGES = 10;
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const commonReadableHandlerGenerator =
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(ctx: Koa.Context) =>
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(e: Error): void => {
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serverLogger.error(e);
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ctx.status = 500;
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ctx.set("Cache-Control", "max-age=300");
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};
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export default async function (ctx: Koa.Context) {
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const key = ctx.params.key;
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// Fetch drive file
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const file = await DriveFiles.createQueryBuilder("file")
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.where("file.accessKey = :accessKey", { accessKey: key })
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.orWhere("file.thumbnailAccessKey = :thumbnailAccessKey", {
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thumbnailAccessKey: key,
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})
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.orWhere("file.webpublicAccessKey = :webpublicAccessKey", {
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webpublicAccessKey: key,
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})
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.getOne();
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if (file == null) {
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ctx.status = 404;
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ctx.set("Cache-Control", "max-age=86400");
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await send(ctx as any, "/dummy.png", { root: assets });
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return;
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}
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ctx.set("X-Content-Type-Options", "nosniff");
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const isThumbnail = file.thumbnailAccessKey === key;
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const isWebpublic = file.webpublicAccessKey === key;
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if (!file.storedInternal) {
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if (file.isLink && file.uri) {
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// 期限切れリモートファイル
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const [path, cleanup] = await createTemp();
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try {
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await downloadUrl(file.uri, path);
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const { mime, ext } = await detectType(path);
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const convertFile = async () => {
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if (isThumbnail) {
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if (
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[
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"image/jpeg",
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"image/webp",
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"image/png",
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"image/svg+xml",
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"image/avif",
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].includes(mime)
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) {
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return await convertToWebp(path, 996, 560);
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} else if (mime.startsWith("video/")) {
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return await GenerateVideoThumbnail(path);
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}
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}
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if (isWebpublic) {
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if (["image/svg+xml"].includes(mime)) {
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return await convertToWebp(path, 2048, 2048, 100);
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}
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}
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return {
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data: fs.readFileSync(path),
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ext,
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type: mime,
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};
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};
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const image = await convertFile();
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ctx.body = image.data;
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ctx.set(
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"Content-Type",
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FILE_TYPE_BROWSERSAFE.includes(image.type)
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? image.type
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: "application/octet-stream",
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);
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ctx.set("Cache-Control", "max-age=31536000, immutable");
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} catch (e) {
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serverLogger.error(`${inspect(e)}`);
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if (e instanceof StatusError && e.isClientError) {
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ctx.status = e.statusCode;
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ctx.set("Cache-Control", "max-age=86400");
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} else {
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ctx.status = 500;
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ctx.set("Cache-Control", "max-age=300");
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}
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} finally {
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cleanup();
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}
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return;
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}
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ctx.status = 204;
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ctx.set("Cache-Control", "max-age=86400");
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return;
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}
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let contentType;
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let filename;
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let fileHandle;
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if (isThumbnail || isWebpublic) {
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const { mime, ext } = await detectType(InternalStorage.resolvePath(key));
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(contentType = FILE_TYPE_BROWSERSAFE.includes(mime)
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? mime
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: "application/octet-stream"),
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(filename = rename(file.name, {
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suffix: isThumbnail ? "-thumb" : "-web",
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extname: ext ? `.${ext}` : undefined,
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}).toString());
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fileHandle = await InternalStorage.open(key, "r");
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} else {
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(contentType = FILE_TYPE_BROWSERSAFE.includes(file.type)
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? file.type
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: "application/octet-stream"),
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(filename = file.name);
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fileHandle = await InternalStorage.open(file.accessKey!, "r");
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}
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// We can let Koa evaluate conditionals by setting
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// the status to 200, along with the lastModified
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// and etag properties, then checking ctx.fresh.
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// Additionally, Range is ignored if a conditional GET would
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// result in a 304 response, so we can return early here.
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ctx.status = 200;
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ctx.etag = file.md5;
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ctx.lastModified = file.createdAt;
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// When doing a conditional request, we MUST return a "Cache-Control" header
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// if a normal 200 response would have included.
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if (contentType === "application/octet-stream") {
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ctx.vary("Accept");
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ctx.set("Cache-Control", "private, max-age=0, must-revalidate");
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if (ctx.header.accept?.match(/activity\+json|ld\+json/)) {
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ctx.status = 400;
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return;
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}
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} else {
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ctx.set("Cache-Control", "max-age=2592000, s-maxage=172800, immutable");
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}
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if (ctx.fresh) {
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ctx.status = 304;
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return;
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}
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ctx.set("Content-Disposition", contentDisposition("inline", filename));
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ctx.set("Content-Type", contentType);
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const ranges = ByteRangeReadable.parseByteRanges(
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BigInt(file.size),
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MAX_BYTE_RANGES,
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ctx.headers["range"],
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);
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const readable =
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ranges.length === 0
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? fileHandle.createReadStream()
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: new ByteRangeReadable(
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fileHandle.fd,
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BigInt(file.size),
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ranges,
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contentType,
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);
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readable.on("error", commonReadableHandlerGenerator(ctx));
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ctx.body = readable;
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if (ranges.length === 0) {
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ctx.set("Accept-Ranges", "bytes");
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} else {
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ctx.status = 206;
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readable.on("close", async () => {
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await fileHandle.close();
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});
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if (ranges.length === 1) {
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ctx.set(
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"Content-Range",
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`bytes ${ranges[0].start}-${ranges[0].end}/${file.size}`,
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);
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} else {
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ctx.set(
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"Content-Type",
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`multipart/byteranges; boundary=${readable.boundary}`,
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);
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}
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}
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}
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