pico-pixel-player

pico-pixel-player/server/src/index.ts
index.ts
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1import staticPlugin from "@elysiajs/static";
2import { Elysia, type InferHandler, t } from "elysia";
3import path, { basename } from "node:path";
4import { parseArgs } from "node:util";
5import {
6 musicRoot,
7 fileTypeCache,
8 ServerError,
9 allowedTypes,
10 probeCache,
11 mediaTypes,
12 generatedPlaylistIds,
13 username,
14 password,
15 authTokens,
16} from "./shared";
17import {
18 getPathInfo,
19 listFiles,
20 findCover,
21 matchesType,
22 convertWithFFmpeg,
23 packWithTar,
24 probeFile,
25 toAvif,
26} from "./utils";
27import { stat } from "node:fs/promises";
28
29import parseRange from "range-parser";
30import { MediaFormat } from "music-server-shared/types";
31import { decodePath } from "music-server-shared/utils";
32import { stringifyMap } from "music-server-shared/mapconversion";
33import { randomUUIDv7 } from "bun";
34
35//TODO: transcoding cache?
36//TODO: add reasonable timeouts for caches
37//TODO: better ffmpeg errors
38//TODO: more cover detection
39
40const { values } = parseArgs({
41 args: Bun.argv,
42 options: {
43 serve: {
44 type: "string",
45 },
46 },
47 strict: true,
48 allowPositionals: true,
49});
50
51if (!values.serve) {
52 console.error("Missing --serve, set it to the directory containing the frontend code");
53 process.exit(1);
54}
55
56//increase timeout to not abort when listing huge folders
57const setup = new Elysia({ serve: { idleTimeout: 255 } });
58
59const paramType = t.ArrayString();
60type DownloadHandler = InferHandler<typeof setup, "/download/*", { params: typeof paramType }>;
61
62const downloadHandler: DownloadHandler = async ({ headers, params, set, request }) => {
63 if (request.method !== "GET" && request.method !== "HEAD") {
64 set.status = "Not Found";
65 return "NOT_FOUND";
66 }
67 const filePath = path.join(musicRoot, decodePath(params["*"]));
68 const fileScan = await getPathInfo(filePath);
69 if (!fileScan || fileScan instanceof ServerError) {
70 set.status = fileScan?.status || "Internal Server Error";
71 return fileScan?.error || "Not a file";
72 }
73 if (!matchesType(fileScan.mimeType, allowedTypes)) {
74 set.status = "Forbidden";
75 return "Forbidden file type";
76 }
77
78 set.status = "OK";
79 if (fileScan.mimeType === "audio/x-flac") fileScan.mimeType = "audio/flac"; //seems to be better supported
80 set.headers["content-type"] = fileScan.mimeType;
81
82 const statResult = await stat(filePath);
83 const fileSize = statResult.size;
84
85 if (request.method === "HEAD") {
86 set.headers["accept-ranges"] = "bytes";
87 set.headers["content-length"] = fileSize;
88 return;
89 }
90
91 if (!headers.range) {
92 set.status = "OK";
93 return Bun.file(filePath);
94 }
95
96 const rangeData = parseRange(fileSize, headers.range, { combine: true });
97 if (rangeData === -1 || rangeData === -2 || rangeData.length > 1) {
98 set.status = "Range Not Satisfiable";
99 return "Range Not Satisfiable";
100 }
101 const { start, end } = rangeData[0];
102 set.status = "Partial Content";
103 set.headers["Content-Range"] = `bytes ${start}-${end}/${fileSize}`;
104 // set.headers["content-length"] = end - start + 1; //currently broken in bun/elysiajs, overwritten in final response, seems to be fine though
105 // return createReadStream(filePath, { start, end });
106 return new Response(Bun.file(filePath).slice(start, end));
107};
108
109const app = setup
110 .use(staticPlugin({ assets: values.serve, prefix: "/" }))
111 .onBeforeHandle(({ request, path }) => {
112 if (path === "/remote-log") return;
113 console.info(request.method, path);
114 })
115 .post(
116 "/login",
117 ({ body, set }) => {
118 const [givenUser, givenPassword] = (body as string).split(":", 2);
119 if (givenUser === username && givenPassword === password) {
120 set.status = 200;
121 const millisInYear = 365 * 24 * 60 * 60 * 1000;
122 const endDate = new Date(Date.now() + millisInYear);
123 const token = randomUUIDv7();
124 authTokens.set(token, endDate);
125 set.headers["set-cookie"] =
126 `authToken=${token}; Expires=${endDate.toUTCString()}; Secure; HttpOnly; SameSite=Strict"`;
127 return "Logged in successfully";
128 }
129 set.status = 401;
130 return "Invalid username or password";
131 },
132 { body: t.String() },
133 )
134 .guard(
135 {
136 beforeHandle({ cookie: { authToken }, set }) {
137 if (username && password && (!authToken.value || !authTokens.has(authToken.value))) {
138 set.status = 401;
139 set.headers.location;
140 return "Unauthorized";
141 }
142 },
143 },
144 (guarded) =>
145 guarded
146 .post("/reset-cache", () => {
147 fileTypeCache.clear();
148 probeCache.clear();
149 })
150 .get("/download/*", downloadHandler)
151 .head("/download/*", downloadHandler)
152 .get(
153 "/transcode/*",
154 async ({ request, query, set, params }) => {
155 const filePath = path.join(musicRoot, decodePath(params["*"]));
156 const fileScan = await getPathInfo(filePath);
157 if (!fileScan || fileScan instanceof ServerError) {
158 set.status = fileScan?.status || "Internal Server Error";
159 return fileScan?.error || "Not a file";
160 }
161 if (!matchesType(fileScan.mimeType, allowedTypes)) {
162 set.status = "Forbidden";
163 return "Forbidden file type";
164 }
165 const probe = await probeFile(filePath);
166 //don't use higher bitrate than what the file has, use requested bitrate if unknown, default to 96kbit if not provided
167 const bitrate =
168 query.bitrate && probe.bitrate ? Math.min(query.bitrate, probe.bitrate) : query.bitrate || 96000;
169 if (!matchesType(fileScan.mimeType, mediaTypes)) {
170 set.status = "Temporary Redirect";
171 set.headers.Location = `/download/${params["*"]}`;
172 return "Not a media file, redirecting to normal endpoint";
173 }
174 const { cmd, mimeType } = convertWithFFmpeg(
175 filePath,
176 bitrate,
177 query.format ?? MediaFormat["opus/ogg"],
178 query.seekTo,
179 );
180 request.signal.addEventListener("abort", () => cmd.kill("SIGKILL"));
181 set.headers["content-type"] = mimeType;
182 if (query.disableChunkedTranscoding) {
183 const chunks: Uint8Array[] = [];
184 for await (const chunk of cmd.stdout) {
185 chunks.push(chunk);
186 }
187 const full = new Uint8Array(chunks.reduce((acc, val) => acc + val.length, 0));
188 let offset = 0;
189 for (const chunk of chunks) {
190 full.set(chunk, offset);
191 offset += chunk.length;
192 }
193 return full;
194 }
195 return new Response(cmd.stdout);
196 },
197 {
198 query: t.Object({
199 bitrate: t.Number(),
200 format: t.Enum(MediaFormat),
201 disableChunkedTranscoding: t.Optional(t.Boolean()),
202 seekTo: t.Optional(t.Number()),
203 }),
204 },
205 )
206 .get(
207 "/list/*",
208 async ({ params, set, query }) => {
209 const dirPath = path.join(musicRoot, decodePath(params["*"]));
210 const fileList = await listFiles(dirPath, query.recursive || false);
211 if (fileList instanceof ServerError) {
212 set.status = fileList.status;
213 return fileList.error;
214 }
215 set.headers["Content-Type"] = "application/json";
216 set.status = "OK";
217 return stringifyMap(fileList);
218 },
219 { query: t.Optional(t.Object({ recursive: t.Boolean() })) },
220 )
221 .get(
222 "/cover/*",
223 async ({ params, set, query }) => {
224 set.status = "Not Found";
225 const dirPath = path.join(musicRoot, decodePath(params["*"]));
226 const fileScanResult = await findCover(dirPath);
227 const setContentType = (type: string) => {
228 set.headers["Content-Type"] = type;
229 };
230 if ("path" in fileScanResult) {
231 set.headers["Content-Type"] = fileScanResult.info.mimeType;
232 set.status = "OK";
233 if (query.transcode)
234 return new Response(
235 await toAvif(
236 await Bun.file(fileScanResult.path).bytes(),
237 fileScanResult.info.mimeType,
238 setContentType,
239 ),
240 );
241 //wrapping in new response discards the accept-range header, which we don't support here
242 return new Response(Bun.file(fileScanResult.path));
243 }
244 if ("content" in fileScanResult) {
245 set.headers["Content-Type"] = fileScanResult.info.mimeType;
246 set.status = "OK";
247 if (query.transcode)
248 return new Response(await toAvif(fileScanResult.content, fileScanResult.info.mimeType, setContentType));
249 return new Response(fileScanResult.content);
250 }
251 set.status = fileScanResult.info.status;
252 return fileScanResult.info.error;
253 },
254 { query: t.Optional(t.Object({ transcode: t.Boolean() })) },
255 )
256 .post("/prepare-playlist", async ({ set, body }) => {
257 set.status = "OK";
258 set.headers["Content-Type"] = "text/plain";
259 const id = randomUUIDv7();
260 generatedPlaylistIds.set(id, JSON.parse(body as string) as string[]);
261 setTimeout(
262 () => {
263 generatedPlaylistIds.delete(id);
264 },
265 1000 * 60 * 60, // 1 hour
266 );
267 return id;
268 })
269 .get(
270 "/download-playlist/:id",
271 async ({ set, params }) => {
272 const playlist = generatedPlaylistIds.get(params.id);
273 if (!playlist) {
274 set.status = "Not Found";
275 return "Playlist ID not found";
276 }
277 set.status = "OK";
278 if (playlist.length === 1) {
279 set.headers["Content-Disposition"] = `attachment; filename="${basename(playlist[0])}"`;
280 return new Response(Bun.file(path.join(musicRoot, playlist[0])));
281 }
282 set.headers["Content-Type"] = "application/x-tar";
283 set.headers["Content-Disposition"] = `attachment; filename="playlist.tar"`;
284 return new Response(packWithTar(playlist).stdout);
285 },
286 { params: t.Object({ id: t.String({ minLength: 1 }) }) },
287 )
288 .post("remote-log", ({ body }) => {
289 console.log(body);
290 }),
291 )
292 .listen(3000);
293
294console.log(`🦊 Elysia is running at ${app.server?.hostname}:${app.server?.port}`);
295