Function readBlobData

lib/index-browser.js:4772–4792

(body, type, asBlob, callback)

// and translating from base64 if the IDB doesn't support
// native Blobs
function readBlobData(body, type, asBlob, callback) {
  if (asBlob) {
    if (!body) {
      callback(createBlob([''], {type}));
    } else if (typeof body !== 'string') { // we have blob support
      callback(body);
    } else { // no blob support
      callback(b64ToBluffer(body, type));
    }
  } else { // as base64 string
    if (!body) {
      callback('');
    } else if (typeof body !== 'string') { // we have blob support
      readAsBinaryString(body, function (binary) {
        callback(thisBtoa(binary));
      });
    } else { // no blob support
      callback(body);
    }
  }
}

function fetchAttachmentsIfNecessary(doc, opts, txn, cb) {
  var attachments = Object.keys(doc._attachments || {});