micro-image-manager/lib/util/http-util.js

Manage images in your microservices

"use strict";

const url = require('url');

const webpSupported = req => {
  var _req$headers$accept;

  return ((_req$headers$accept = req.headers['accept']) == null ? void 0 : _req$headers$accept.indexOf('image/webp')) > -1 ? 'webp' : '';
};

const identifyImage = req => {
  const requestUrl = req.url.toLowerCase();
  const results = requestUrl.match(/\/image\/([0-9a-zA-Z_-]{1,128})(\.(png|gif|jpg|jpeg|webp))?(\?.*)?/);

  if (results) {
    var _query$format;

    const {
      query
    } = url.parse(requestUrl, true);
    const formatInQuery = (_query$format = query['format']) == null ? void 0 : _query$format.replace('jpg', 'jpeg').split(',');
    const formatInName = results[3];
    const formatInHeader = webpSupported(req);
    const formatDefaults = ['jpeg', 'png'];
    const formats = [...new Set([].concat.apply([], [formatInQuery, formatInName, formatInHeader, formatDefaults]).filter(i => i))];
    const profile = query.profile;
    const idOrName = results[1];
    const id = idOrName.match('[a-zA-Z0-9]{24}') ? idOrName : undefined;
    const name = !idOrName.match('[a-zA-Z0-9]{24}') ? idOrName : undefined;
    return {
      id,
      name,
      profile,
      formats
    };
  }

  throw Error(`Illegal path: ${req.url}`);
};

module.exports = {
  identifyImage
};