Fix downlaoding fail

src/bots/factory/bots/approved/hooks/downloading.ts

@@ -8,6 +8,12 @@ import { BotState, Cache } from '@/bots/manager';
 async function _sendFile(ctx: Context, state: BotState, chatId: number, id: number, format: string) {
     const sendWithDownloadFromChannel = async () => {
         const data = await downloadFromCache(id, format);
+
+        if (data === null) {
+            await ctx.reply("Ошибка скачивания книги. Попробуйте позже");
+            return
+        }
+
         await ctx.telegram.sendDocument(chatId, { source: data.source, filename: data.filename }, { caption: data.caption });
     }
 

src/bots/factory/bots/approved/services/book_cache.ts

@@ -1,4 +1,4 @@
-import got from 'got';
+import got, { Response } from 'got';
 import { decode } from 'js-base64';
 
 import env from '@/config';
@@ -59,15 +59,20 @@ export interface DownloadedFile {
     caption: string;
 }
 
-export async function downloadFromCache(bookId: number, fileType: string): Promise<DownloadedFile> {
+export async function downloadFromCache(bookId: number, fileType: string): Promise<DownloadedFile | null> {
     const readStream = got.stream.get(`${env.CACHE_SERVER_URL}/api/v1/download/${bookId}/${fileType}`, {
         headers: {
             'Authorization': env.CACHE_SERVER_API_KEY,
         },
     });
 
-    return new Promise<DownloadedFile>((resolve, reject) => {
-        readStream.on("response", async response => {
+    return new Promise<DownloadedFile | null>((resolve, reject) => {
+        readStream.on("response", async (response: Response) => {
+            if (response.statusCode !== 200) {
+                resolve(null);
+                return
+            }
+
             const captionData = response.headers['x-caption-b64'];
 
             if (captionData === undefined || Array.isArray(captionData)) throw Error('No caption?');