Function getImageFormat

packages/image/src/resolve.js:121–144

};

const getImageFormat = body => {
  const isPng =
    body[0] === 137 &&
    body[1] === 80 &&
    body[2] === 78 &&
    body[3] === 71 &&
    body[4] === 13 &&
    body[5] === 10 &&
    body[6] === 26 &&
    body[7] === 10;

  const isJpg = body[0] === 255 && body[1] === 216 && body[2] === 255;

  let extension = '';
  if (isPng) {
    extension = 'png';
  } else if (isJpg) {
    extension = 'jpg';
  } else {
    throw new Error('Not valid image extension');
  }

  return extension;
};

const resolveImageFromUrl = async src => {
  const { uri, body, headers, method = 'GET' } = src;