71 lines
1.7 KiB
JavaScript
71 lines
1.7 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @providesModule URL
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* @format
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* @flow
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*/
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'use strict';
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const Blob = require('Blob');
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const {BlobModule} = require('NativeModules');
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let BLOB_URL_PREFIX = null;
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if (BlobModule && typeof BlobModule.BLOB_URI_SCHEME === 'string') {
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BLOB_URL_PREFIX = BlobModule.BLOB_URI_SCHEME + ':';
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if (typeof BlobModule.BLOB_URI_HOST === 'string') {
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BLOB_URL_PREFIX += `//${BlobModule.BLOB_URI_HOST}/`;
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}
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}
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/**
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* To allow Blobs be accessed via `content://` URIs,
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* you need to register `BlobProvider` as a ContentProvider in your app's `AndroidManifest.xml`:
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*
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* ```xml
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* <manifest>
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* <application>
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* <provider
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* android:name="com.facebook.react.modules.blob.BlobProvider"
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* android:authorities="@string/blob_provider_authority"
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* android:exported="false"
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* />
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* </application>
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* </manifest>
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* ```
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* And then define the `blob_provider_authority` string in `res/values/strings.xml`.
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* Use a dotted name that's entirely unique to your app:
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*
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* ```xml
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* <resources>
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* <string name="blob_provider_authority">your.app.package.blobs</string>
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* </resources>
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* ```
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*/
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class URL {
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constructor() {
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throw new Error('Creating URL objects is not supported yet.');
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}
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static createObjectURL(blob: Blob) {
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if (BLOB_URL_PREFIX === null) {
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throw new Error('Cannot create URL for blob!');
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}
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return `${BLOB_URL_PREFIX}${blob.data.blobId}?offset=${
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blob.data.offset
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}&size=${blob.size}`;
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}
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static revokeObjectURL(url: string) {
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// Do nothing.
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}
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}
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module.exports = URL;
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