Sharkey/src/server/file/send-drive-file.ts

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2018-04-12 23:06:18 +02:00
import * as Koa from 'koa';
import * as send from 'koa-send';
import * as mongodb from 'mongodb';
import DriveFile, { getGridFSBucket } from '../../models/drive-file';
import pour from './pour';
export default async function(ctx: Koa.Context) {
// Validate id
if (!mongodb.ObjectID.isValid(ctx.params.id)) {
ctx.throw(400, 'incorrect id');
return;
}
const fileId = new mongodb.ObjectID(ctx.params.id);
// Fetch drive file
const file = await DriveFile.findOne({ _id: fileId });
if (file == null) {
ctx.status = 404;
await send(ctx, `${__dirname}/assets/dummy.png`);
return;
}
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if (file.metadata.deletedAt) {
ctx.status = 410;
await send(ctx, `${__dirname}/assets/tombstone.png`);
return;
}
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const bucket = await getGridFSBucket();
const readable = bucket.openDownloadStream(fileId);
pour(readable, file.contentType, ctx);
}