@aws-amplify/storage
Version:
Storage category of aws-amplify
47 lines (45 loc) • 1.86 kB
JavaScript
;
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
Object.defineProperty(exports, "__esModule", { value: true });
exports.calculateContentMd5 = void 0;
const buffer_1 = require("buffer");
const md5_js_1 = require("@smithy/md5-js");
const utils_1 = require("./client/utils");
// The FileReader in React Native 0.71 did not support `readAsArrayBuffer`. This native implementation accomodates this
// by attempting to use `readAsArrayBuffer` and changing the file reading strategy if it throws an error.
// TODO: This file should be removable when we drop support for React Native 0.71
const calculateContentMd5 = async (content) => {
const hasher = new md5_js_1.Md5();
const buffer = content instanceof Blob ? await readFile(content) : content;
hasher.update(buffer);
const digest = await hasher.digest();
return (0, utils_1.toBase64)(digest);
};
exports.calculateContentMd5 = calculateContentMd5;
const readFile = (file) => new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = () => {
resolve(reader.result);
};
reader.onabort = () => {
reject(new Error('Read aborted'));
};
reader.onerror = () => {
reject(reader.error);
};
try {
reader.readAsArrayBuffer(file);
}
catch (e) {
reader.onload = () => {
// reference: https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL
// response from readAsDataURL is always prepended with "data:*/*;base64,"
const [, base64Data] = reader.result.split(',');
const arrayBuffer = buffer_1.Buffer.from(base64Data, 'base64');
resolve(arrayBuffer);
};
reader.readAsDataURL(file);
}
});
//# sourceMappingURL=md5.native.js.map