@uppy/utils/lib/dataURItoBlob.js

Shared utility functions for Uppy Core and plugins maintained by the Uppy team.

const DATA_URL_PATTERN = /^data:([^/]+\/[^,;]+(?:[^,]*?))(;base64)?,([\s\S]*)$/;
function dataURItoBlob(dataURI, opts, toFile) {
  var _ref, _opts$mimeType;
  // get the base64 data
  const dataURIData = DATA_URL_PATTERN.exec(dataURI);

  // user may provide mime type, if not get it from data URI
  const mimeType = (_ref = (_opts$mimeType = opts.mimeType) != null ? _opts$mimeType : dataURIData == null ? void 0 : dataURIData[1]) != null ? _ref : 'plain/text';
  let data; // We add `!` to tell TS we're OK with `data` being not defined when the dataURI is invalid.
  if ((dataURIData == null ? void 0 : dataURIData[2]) != null) {
    const binary = atob(decodeURIComponent(dataURIData[3]));
    const bytes = new Uint8Array(binary.length);
    for (let i = 0; i < binary.length; i++) {
      bytes[i] = binary.charCodeAt(i);
    }
    data = [bytes];
  } else if ((dataURIData == null ? void 0 : dataURIData[3]) != null) {
    data = [decodeURIComponent(dataURIData[3])];
  }

  // Convert to a File?
  if (toFile) {
    return new File(data, opts.name || '', {
      type: mimeType
    });
  }
  return new Blob(data, {
    type: mimeType
  });
}
export default dataURItoBlob;