subnub
77 lines
2.1 KiB
TypeScript
77 lines
2.1 KiB
TypeScript
import { Response, Request } from "express";
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const StreamSkip = require("stream-skip");
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const awaitStreamVideo = (
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start: number,
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end: number,
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differenceStart: number,
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decipher: any,
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res: Response,
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req: Request,
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streamsToErrorCatch: any[],
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readStream: any
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) => {
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return new Promise<void>((resolve, reject) => {
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req.on("close", () => {
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// readStream.close();
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decipher.destroy();
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resolve();
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});
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req.on("end", () => {
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streamsToErrorCatch.forEach((stream) => {
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stream.destroy();
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});
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resolve();
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});
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streamsToErrorCatch.forEach((currentStream) => {
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currentStream.on("error", (e: Error) => {
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reject({
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message: "Await Video Stream Input Error",
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code: 500,
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error: e,
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});
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});
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});
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readStream.on("close", () => {
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decipher.destroy();
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});
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if (+start === 0 && +end === 1) {
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// This is for Safari/iOS, for whatever reason they ask for the
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// First byte, but if I actually try to return the first byte
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// It will not work ???, but if I return the first 4 bytes it seems
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// To work fine.
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decipher.on("data", (data: Buffer | string) => {
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const dataCoverted = data.toString("hex");
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let neededData = dataCoverted.substring(0, 8);
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const dataBack = Buffer.from(neededData, "hex");
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res.write(dataBack);
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resolve();
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});
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} else {
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// This is where the differnce start comes into play, as I said before
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// There will be an offset caused by the 16 block size of AES256.
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// So if there was an offset we need to skip over those bytes
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// To make sure it returns the exact position the browser is requesting.
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// Most browsers will still work fine without this, such as Chrome and Firefox.
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// But one browser needs to be pampered and fed the exact right bytes in
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// Order to function correctly, can you guess what browser? If you
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// Guessed Safari you would be correct.
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const streamSkip = new StreamSkip({ skip: differenceStart });
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decipher.pipe(streamSkip).pipe(res);
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}
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});
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};
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export default awaitStreamVideo;
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