69 lines
2 KiB
JavaScript
69 lines
2 KiB
JavaScript
const logger = require('winston');
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const transformImage = require('./transformImage');
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const isValidQueryObject = require('server/utils/isValidQueryObj');
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const {
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serving: { dynamicFileSizing },
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} = require('@config/siteConfig');
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const { enabled: dynamicEnabled } = dynamicFileSizing;
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const serveFile = async ({ filePath, fileType }, res, originalUrl) => {
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const queryObject = {};
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// TODO: replace quick/dirty try catch with better practice
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try {
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originalUrl
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.split('?')[1]
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.split('&')
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.map(pair => {
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if (pair.includes('=')) {
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let parr = pair.split('=');
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queryObject[parr[0]] = parr[1];
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} else queryObject[pair] = true;
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});
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} catch (e) {}
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if (!fileType) {
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logger.error(`no fileType provided for ${filePath}`);
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}
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let mediaType = fileType ? fileType.substr(0, fileType.indexOf('/')) : '';
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const transform =
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mediaType === 'image' &&
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queryObject.hasOwnProperty('h') &&
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queryObject.hasOwnProperty('w') &&
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dynamicEnabled;
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const sendFileOptions = {
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headers: {
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'X-Content-Type-Options': 'nosniff',
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'Content-Type': fileType,
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'Access-Control-Allow-Origin': '*',
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'Access-Control-Allow-Headers': 'Origin, X-Requested-With, Content-Type, Accept',
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},
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};
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logger.debug(`fileOptions for ${filePath}:`, sendFileOptions);
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try {
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if (transform) {
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if (!isValidQueryObject(queryObject)) {
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logger.debug(`Unacceptable querystring`, { queryObject });
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res.status(400).json({
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success: false,
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message: 'Querystring may not have dimensions greater than 2000',
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});
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res.end();
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}
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logger.debug(`transforming and sending file`);
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let xformed = await transformImage(filePath, queryObject);
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res.status(200).set(sendFileOptions.headers);
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res.end(xformed, 'binary');
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} else {
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res.status(200).sendFile(filePath, sendFileOptions);
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}
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} catch (e) {
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logger.debug(e);
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}
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};
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module.exports = serveFile;
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