subnub
84 lines
3.0 KiB
TypeScript
84 lines
3.0 KiB
TypeScript
import mongoose from "../../../db/mongoose";
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import crypto from "crypto";
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import Thumbnail from "../../../models/thumbnail";
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import { ObjectID } from "mongodb";
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import sharp from "sharp";
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import concat from "concat-stream";
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import { FileInterface } from "../../../models/file";
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import { UserInterface } from "../../../models/user";
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const conn = mongoose.connection;
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const createThumbnail = (file: FileInterface, filename: string, user: UserInterface) => {
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return new Promise<FileInterface>((resolve) => {
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const password = user.getEncryptionKey();
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let CIPHER_KEY = crypto.createHash('sha256').update(password!).digest()
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let bucket = new mongoose.mongo.GridFSBucket(conn.db, {
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chunkSizeBytes: 1024 * 255
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})
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const readStream = bucket.openDownloadStream(new ObjectID(file._id))
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readStream.on("error", (e: Error) => {
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console.log("File service upload thumbnail error", e);
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resolve(file);
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})
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const decipher = crypto.createDecipheriv('aes256', CIPHER_KEY, file.metadata.IV);
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decipher.on("error", (e: Error) => {
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console.log("File service upload thumbnail decipher error", e);
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resolve(file)
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})
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try {
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const concatStream = concat(async(bufferData: Buffer) => {
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const thumbnailIV = crypto.randomBytes(16);
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const thumbnailCipher = crypto.createCipheriv("aes256", CIPHER_KEY, thumbnailIV);
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bufferData = Buffer.concat([thumbnailIV, thumbnailCipher.update(bufferData), thumbnailCipher.final()]);
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const thumbnailModel = new Thumbnail({name: filename, owner: user._id, data: bufferData});
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await thumbnailModel.save();
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const getUpdatedFile = await conn.db.collection("fs.files")
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.findOneAndUpdate({"_id": file._id}, {"$set": {"metadata.hasThumbnail": true, "metadata.thumbnailID": thumbnailModel._id}})
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let updatedFile: FileInterface = getUpdatedFile.value;
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updatedFile = {...updatedFile, metadata: {...updatedFile.metadata, hasThumbnail: true, thumbnailID: thumbnailModel._id}} as FileInterface;
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resolve(updatedFile);
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}).on("error", (e: Error) => {
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console.log("File service upload concat stream error", e);
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resolve(file);
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})
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const imageResize = sharp().resize(300).on("error", (e: Error) => {
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console.log("resize error", e);
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resolve(file);
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})
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readStream.pipe(decipher).pipe(imageResize).pipe(concatStream);
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} catch (e) {
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console.log(e);
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resolve(file);
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}
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})
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}
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export default createThumbnail; |