Code refactoring and set up format selection

Set up format selection and archive download for next releases

server/src/core/Process.ts

@@ -39,9 +39,7 @@ class Process {
      * @param callback not yet implemented
      * @returns the process instance
      */
-    async start(callback?: Function): Promise<this> {
-        await this.internalGetInfo();
-
+    public async start(callback?: Function): Promise<this> {
         const sanitizedParams = this.params.filter((param: string) => availableParams.includes(param));
 
         const ytldp = spawn(this.exePath,
@@ -59,37 +57,50 @@ class Process {
     }
 
     /**
-     * @private
      * function used internally by the download process to fetch information, usually thumbnail and title
      * @returns Promise to the lock
      */
-    private async internalGetInfo() {
-        this.lock = true;
+    public getInfo(): Promise<IDownloadInfo> {
         let stdoutChunks = [];
-        const ytdlpInfo = spawn(this.exePath, ['-s', '-j', this.url]);
+        const ytdlpInfo = spawn(this.exePath, ['-j', this.url]);
 
         ytdlpInfo.stdout.on('data', (data) => {
             stdoutChunks.push(data);
         });
 
-        ytdlpInfo.on('exit', () => {
-            try {
-                const buffer = Buffer.concat(stdoutChunks);
-                const json = JSON.parse(buffer.toString());
-                this.info = json;
-                this.lock = false;
+        return new Promise((resolve, reject) => {
+            ytdlpInfo.on('exit', () => {
+                try {
+                    const buffer = Buffer.concat(stdoutChunks);
+                    const json = JSON.parse(buffer.toString());
+                    this.info = json;
+                    this.lock = false;
+                    resolve({
+                        formats: json.formats.map((format: IDownloadInfoSection) => {
+                            return {
+                                format_id: format.format_id ?? '',
+                                format_note: format.format_note ?? '',
+                                fps: format.fps ?? '',
+                                resolution: format.resolution ?? '',
+                                vcodec: format.vcodec ?? '',
+                            }
+                        }),
+                        best: {
+                            format_id: json.format_id ?? '',
+                            format_note: json.format_note ?? '',
+                            fps: json.fps ?? '',
+                            resolution: json.resolution ?? '',
+                            vcodec: json.vcodec ?? '',
+                        },
+                        thumbnail: json.thumbnail,
+                        title: json.title,
+                    });
 
-            } catch (e) {
-                this.info = {
-                    title: "",
-                    thumbnail: "",
-                };
-            }
-        });
-
-        if (!this.lock) {
-            return true;
-        }
+                } catch (e) {
+                    reject('failed fetching formats, downloading best available');
+                }
+            });
+        })
     }
 
     /**
@@ -119,14 +130,6 @@ class Process {
     getStdout(): Readable {
         return this.stdout
     }
-
-    /**
-     * download info getter function
-     * @returns {*}
-     */
-    getInfo(): any {
-        return this.info
-    }
 }
 
 export default Process;

server/src/core/downloadArchive.ts

@@ -0,0 +1,15 @@
+import { resolve } from "path";
+
+const archived = [
+    {
+        id: 1,
+        title: 'AleXa (알렉사) – Voting Open in American Song Contest Grand Final!',
+        path: resolve('downloads/AleXa (알렉사) – Voting Open in American Song Contest Grand Final!.webm'),
+        img: 'https://i.ytimg.com/vi/WbBUz7pjUnM/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLAi5MNtvpgnY9aRpdFlhAfhdV7Zlg',
+    },
+]
+
+export function listDownloaded(ctx: any, next: any) {
+    ctx.body = archived
+    next()
+}

server/src/core/downloader.ts

@@ -23,6 +23,18 @@ catch (e) {
     new Promise(resolve => setTimeout(resolve, 500))
         .then(() => log.warn('dl', 'settings.json not found, ignore if using Docker'));
 }
+/**
+ * Get download info such as thumbnail, title, resolution and list all formats
+ * @param socket 
+ * @param url 
+ */
+export async function getFormatsAndInfo(socket: Socket, url: string) {
+    let p = new Process(url, [], settings);
+    const formats = await p.getInfo();
+    console.log(formats)
+    socket.emit('available-formats', formats)
+    p = null;
+}
 
 /**
  * Invoke a new download.  
@@ -42,27 +54,21 @@ export async function download(socket: Socket, payload: IPayload) {
         payload.params.split(' ') :
         payload.params;
 
-    const p = new Process(url, params, settings);
+    let p = new Process(url, params, settings);
 
     p.start().then(downloader => {
         pool.add(p)
-        let infoLock = true;
         let pid = downloader.getPid();
 
+        p.getInfo().then(info => {
+            socket.emit('info', { pid: pid, info: info });
+        });
+
         from(downloader.getStdout())              // stdout as observable
             .pipe(throttle(() => interval(500)))  // discard events closer than 500ms
             .subscribe({
                 next: (stdout) => {
-                    if (infoLock) {
-                        if (downloader.getInfo() === null) {
-                            return;
-                        }
-                        socket.emit('info', {
-                            pid: pid, info: downloader.getInfo()
-                        });
-                        infoLock = false;
-                    }
-                    socket.emit('progress', formatter(String(stdout), pid)) // finally, emit
+                    socket.emit('progress', formatter(String(stdout), pid))
                 },
                 complete: () => {
                     downloader.kill().then(() => {
@@ -79,11 +85,10 @@ export async function download(socket: Socket, payload: IPayload) {
                     });
                 }
             });
-    })
+    });
 }
 
 /**
- * @deprecated
  * Retrieve all downloads.  
  * If the server has just been launched retrieve the ones saved to the database.  
  * If the server is running fetches them from the process pool.

server/src/core/streamer.ts

@@ -0,0 +1,39 @@
+import { stat, createReadStream } from 'fs';
+import { lookup } from 'mime-types';
+
+export function streamer(ctx: any, next: any) {
+    const filepath = '/Users/marco/dev/homebrew/yt-dlp-web-ui/downloads/AleXa (알렉사) – Voting Open in American Song Contest Grand Final!.webm'
+    stat(filepath, (err, stat) => {
+        if (err) {
+            ctx.response.status = 404;
+            ctx.body = { err: 'resource not found' };
+            next();
+        }
+        const fileSize = stat.size;
+        const range = ctx.headers.range;
+        if (range) {
+            const parts = range.replace(/bytes=/, '').split('-');
+            const start = parseInt(parts[0], 10);
+            const end = parts[1] ? parseInt(parts[1], 10) : fileSize - 1;
+            const chunksize = end - start + 1;
+            const file = createReadStream(filepath, { start, end });
+            const head = {
+                'Content-Range': `bytes ${start}-${end}/${fileSize}`,
+                'Accept-Ranges': 'bytes',
+                'Content-Length': chunksize,
+                'Content-Type': lookup(filepath)
+            };
+            ctx.res.writeHead(206, head);
+            file.pipe(ctx.res);
+            next();
+        } else {
+            const head = {
+                'Content-Length': fileSize,
+                'Content-Type': 'video/mp4'
+            };
+            ctx.res.writeHead(200, head);
+            createReadStream(ctx.params.filepath).pipe(ctx.res);
+            next();
+        }
+    });
+}