start with streamer

src/KodiApi/AllFiles/all-files.controller.ts

@@ -1,7 +1,8 @@
-import { Controller, Get, Param } from '@nestjs/common';
+import { Controller, Get, Head, Param, Req, Res } from '@nestjs/common';
 import ApiResponse from '../Dto/api-response.dto';
 import { AllFilesService } from './all-files.service';
 import { TitleTypeEnum } from './Enum/title-type.enum';
+import { Request, Response } from 'express';
 
 @Controller('api/all')
 export class AllFilesController {
@@ -23,8 +24,13 @@ export class AllFilesController {
   }
 
   @Get('play/:fileId')
-  play(@Param('fileId') fileId: string) {
-    return { will: 'return a playable stream of ' + fileId };
+  @Head('play/:fileId')
+  play(
+    @Param('fileId') fileId: string,
+    @Req() request: Request,
+    @Res() response: Response,
+  ) {
+    this.allFilesService.play(fileId, request, response);
   }
 
   @Get(':titleId/:seasonId?')

src/KodiApi/AllFiles/all-files.module.ts

@@ -5,9 +5,13 @@ import { KodiApiResponseFactory } from '../kodi-api-response.factory';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { TitleEntity } from './Entity/title.entity';
 import { FileEntity } from './Entity/file.entity';
+import { StreamerModule } from '../../Streamer/streamer.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([TitleEntity, FileEntity])],
+  imports: [
+    TypeOrmModule.forFeature([TitleEntity, FileEntity]),
+    StreamerModule,
+  ],
   controllers: [AllFilesController],
   providers: [AllFilesService, KodiApiResponseFactory],
 })

src/KodiApi/AllFiles/all-files.service.ts

@@ -1,4 +1,4 @@
-import { Injectable } from '@nestjs/common';
+import { Injectable, NotFoundException } from '@nestjs/common';
 import ApiResponse from '../Dto/api-response.dto';
 import { KodiApiResponseFactory } from '../kodi-api-response.factory';
 import { InjectRepository } from '@nestjs/typeorm';
@@ -6,6 +6,8 @@ import { Repository } from 'typeorm';
 import { TitleEntity } from './Entity/title.entity';
 import { FileEntity } from './Entity/file.entity';
 import { TitleTypeEnum } from './Enum/title-type.enum';
+import { StreamerFacade } from '../../Streamer/streamer.facade';
+import { Request, Response } from 'express';
 
 @Injectable()
 export class AllFilesService {
@@ -15,6 +17,7 @@ export class AllFilesService {
     private titleRepository: Repository<TitleEntity>,
     @InjectRepository(FileEntity)
     private fileRepository: Repository<FileEntity>,
+    private readonly streamerFacade: StreamerFacade,
   ) {}
 
   getMenu(): ApiResponse {
@@ -125,4 +128,19 @@ export class AllFilesService {
 
     return apiResponse;
   }
+
+  async play(
+    fileId: string,
+    request: Request,
+    response: Response,
+  ): Promise<void> {
+    const id = parseInt(fileId);
+    const entity = await this.fileRepository.findOne({ where: { id: id } });
+
+    if (entity === null) {
+      throw new NotFoundException('entity not found id: ' + fileId);
+    }
+
+    this.streamerFacade.streamFile(request, response, entity.path);
+  }
 }

src/RequestRange/request-range-bytes.class.ts

@@ -1,9 +0,0 @@
-export default class RequestRangeBytes {
-  readonly end: number | null;
-  readonly start: number | null;
-
-  constructor(start: number | null, end: number | null) {
-    this.start = start;
-    this.end = end;
-  }
-}

src/RequestRange/request-range.decorator.ts

@@ -1,24 +0,0 @@
-import { createParamDecorator, ExecutionContext } from '@nestjs/common';
-import RequestRangeBytes from './request-range-bytes.class';
-
-export const RequestRange = createParamDecorator(
-  (data: string, ctx: ExecutionContext): RequestRangeBytes | null => {
-    const request = ctx.switchToHttp().getRequest().headers;
-
-    const range = request['range'];
-    if (!range) {
-      return null;
-    }
-
-    const array = range.split(/bytes=([0-9]*)-([0-9]*)/);
-
-    let start = parseInt(array[1]);
-    let end = parseInt(array[2]);
-
-    //both isNaN? -> incorrect request header, response with everything we have
-    start = isNaN(start) ? null : start; //isNaN? -> only num of end bytes requested
-    end = isNaN(end) ? null : end; //isNaN? -> everything from start to the end requested
-
-    return new RequestRangeBytes(start, end);
-  },
-);

src/Streamer/Mime/mime.service.ts

@@ -0,0 +1,32 @@
+import { Injectable } from '@nestjs/common';
+import { extname } from 'path';
+
+@Injectable()
+export class MimeService {
+  private mimeNames = {
+    '.css': 'text/css',
+    '.html': 'text/html',
+    '.js': 'application/javascript',
+    '.mp3': 'audio/mpeg',
+    '.mp4': 'video/mp4',
+    '.ogg': 'application/ogg',
+    '.ogv': 'video/ogg',
+    '.oga': 'audio/ogg',
+    '.txt': 'text/plain',
+    '.wav': 'audio/x-wav',
+    '.webm': 'video/webm',
+    '.mkv': 'video/x-matroska',
+    '.m3u': 'application/vnd.apple.mpegurl',
+    '.ts': 'video/MP2T',
+    '.json': 'application/json',
+    '.avi': 'video/x-msvideo',
+  };
+
+  getMime(filePath: string): string {
+    return this.getMimeNameFromExt(extname(filePath));
+  }
+
+  private getMimeNameFromExt(ext): string {
+    return this.mimeNames[ext.toLowerCase()] ?? 'application/octet-stream';
+  }
+}

src/Streamer/RequestRange/request-range-bytes.class.ts

@@ -0,0 +1,9 @@
+export default class RequestRangeBytes {
+  readonly end: number;
+  readonly start: number;
+
+  constructor(start: number, end: number) {
+    this.start = start;
+    this.end = end;
+  }
+}

src/Streamer/RequestRange/request-range.decorator.ts

@@ -0,0 +1,18 @@
+import {
+  createParamDecorator,
+  ExecutionContext,
+  HttpException,
+} from '@nestjs/common';
+import RequestRangeBytes from './request-range-bytes.class';
+
+export const RequestRange = createParamDecorator(
+  (data: string, ctx: ExecutionContext): RequestRangeBytes | null => {
+    const headers = ctx.switchToHttp().getRequest().headers;
+
+    if (headers['range']) {
+      throw new HttpException('not implemented', 501);
+    }
+
+    return new RequestRangeBytes(null, null);
+  },
+);

src/Streamer/RequestRange/request-range.service.ts

@@ -0,0 +1,32 @@
+import { Injectable } from '@nestjs/common';
+import RequestRangeBytes from './request-range-bytes.class';
+import { Request } from 'express';
+
+@Injectable()
+export class RequestRangeService {
+  getRangeFromHeaders(request: Request, fileSize: number): RequestRangeBytes {
+    const range = request.headers['range'];
+    if (!range || range.length === 0) {
+      return new RequestRangeBytes(0, fileSize - 1);
+    }
+
+    const rangeArray = range.split(/bytes=([0-9]*)-([0-9]*)/);
+
+    const start = parseInt(rangeArray[1]);
+    const end = parseInt(rangeArray[2]);
+
+    if (isNaN(start) && isNaN(end)) {
+      return new RequestRangeBytes(0, fileSize - 1);
+    }
+
+    if (!isNaN(start) && isNaN(end)) {
+      return new RequestRangeBytes(start, fileSize - 1);
+    }
+
+    if (isNaN(start) && !isNaN(end)) {
+      return new RequestRangeBytes(fileSize - end, fileSize - 1);
+    }
+
+    return new RequestRangeBytes(start, end);
+  }
+}

src/Streamer/streamer.facade.ts

@@ -0,0 +1,12 @@
+import { Injectable } from '@nestjs/common';
+import { Request, Response } from 'express';
+import { StreamerService } from './streamer.service';
+
+@Injectable()
+export class StreamerFacade {
+  constructor(private readonly streamerService: StreamerService) {}
+
+  streamFile(request: Request, response: Response, filePath: string): void {
+    this.streamerService.streamFile(request, response, filePath);
+  }
+}

src/Streamer/streamer.module.ts

@@ -0,0 +1,17 @@
+import { Module } from '@nestjs/common';
+import { StreamerFacade } from './streamer.facade';
+import { MimeService } from './Mime/mime.service';
+import { RequestRangeService } from './RequestRange/request-range.service';
+import { StreamerService } from './streamer.service';
+
+@Module({
+  imports: [],
+  providers: [
+    MimeService,
+    RequestRangeService,
+    StreamerService,
+    StreamerFacade,
+  ],
+  exports: [StreamerFacade],
+})
+export class StreamerModule {}

src/Streamer/streamer.service.ts

@@ -0,0 +1,110 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { Request, Response } from 'express';
+import { MimeService } from './Mime/mime.service';
+import { RequestRangeService } from './RequestRange/request-range.service';
+import { stat } from 'fs/promises';
+import { createReadStream, ReadStream, Stats } from 'fs';
+import RequestRangeBytes from './RequestRange/request-range-bytes.class';
+
+@Injectable()
+export class StreamerService {
+  constructor(
+    readonly mimeService: MimeService,
+    readonly requestRangeService: RequestRangeService,
+  ) {}
+
+  async streamFile(
+    request: Request,
+    response: Response,
+    filePath: string,
+  ): Promise<void> {
+    const stats: Stats | false = await stat(filePath).catch(() => false);
+    if (stats === false) {
+      throw new NotFoundException('file not found');
+    }
+
+    const requestRange = this.requestRangeService.getRangeFromHeaders(
+      request,
+      stats.size,
+    );
+    console.log(requestRange, request.method);
+
+    if (!this.isRangeSatisfiable(requestRange, stats.size)) {
+      const responseHeaders = { 'Content-Range': 'bytes */' + stats.size };
+      this.sendResponse(response, 416, responseHeaders, null);
+
+      return;
+    }
+
+    const responseHeaders = this.createResponseHeaders(
+      filePath,
+      stats.size,
+      requestRange,
+    );
+
+    if (request.method == 'HEAD') {
+      this.sendResponse(
+        response,
+        request.headers.range ? 206 : 200,
+        responseHeaders,
+        null,
+      );
+    } else {
+      this.sendResponse(
+        response,
+        request.headers.range ? 206 : 200,
+        responseHeaders,
+        createReadStream(filePath, requestRange),
+      );
+    }
+  }
+
+  private createResponseHeaders(
+    filePath: string,
+    contentSize: number,
+    requestRange: RequestRangeBytes | null,
+  ): Record<string, string> {
+    const responseHeaders = {};
+    responseHeaders['Content-Type'] = this.mimeService.getMime(filePath);
+    responseHeaders['Accept-Ranges'] = 'bytes';
+    responseHeaders['Cache-Control'] = 'no-cache';
+    responseHeaders['Content-Length'] = contentSize;
+
+    if (requestRange) {
+      responseHeaders[
+        'Content-Range'
+      ] = `bytes ${requestRange.start}-${requestRange.end}/${contentSize}`;
+
+      responseHeaders['Content-Length'] =
+        requestRange.end - requestRange.start + 1;
+    }
+
+    return responseHeaders;
+  }
+
+  private sendResponse(
+    response: Response,
+    status: number,
+    headers: Record<string, string>,
+    readable: ReadStream | null = null,
+  ): void {
+    response.writeHead(status, headers);
+    if (!readable) {
+      response.end();
+      return;
+    }
+
+    readable.pipe(response);
+  }
+
+  private isRangeSatisfiable(
+    requestRange: RequestRangeBytes,
+    fileSize: number,
+  ): boolean {
+    return (
+      requestRange.start < fileSize &&
+      requestRange.end < fileSize &&
+      requestRange.end >= requestRange.start
+    );
+  }
+}