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shimapan/app/routes/api/view.js

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const express = require('express');
const router = express.Router();
const config = require('config');
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const fs = require('fs');
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const ModelPath = '../../models/';
const Upload = require(ModelPath + 'Upload.js');
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const wrap = require('../../util/wrap.js');
const incrementViews = async id =>
Upload.updateOne({id: id}, {$inc: {views: 1}});
router.get('/:id', wrap(async (req, res) => {
const upload = await Upload.findOne({id: req.params.id});
if (!upload)
return res.status(404).json({message: 'File not found.'});
// Increment the file's view counter
await incrementViews(req.params.id);
// Whether the file should be an attachment or displayed inline on the page
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const mimetype = upload.file.mime.split('/');
const inlineMimeTypes = config.get('View.inlineMimeTypes').map(type => type.split('/'));
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let inline = inlineMimeTypes.some(type =>
(mimetype[0] === type[0] || type[0] === '*') &&
(mimetype[1] === type[1] || type[1] === '*'));
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res.status(200);
res.set({
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'Content-Disposition': inline ? 'inline' : 'attachment; filename="' + upload.file.originalName + '"',
'Content-Type': upload.file.mime
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});
fs.createReadStream(upload.file.path)
.pipe(res);
}));
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module.exports = router;