mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-14 15:56:38 +03:00
Joey Parrish
5a0383585f
Data URIs can have additional parameters other than just the MIME type and encoding. While working on TTML fixes, I was debugging by inserting data URIs as TTML text tracks. But the data URI encoder I used was inserting a "charset" parameter into the URI, which was rejected by Shaka Player. This fixes the data URI parser to understand these extra parameters. While researching this fix, I also found that only the base64 encoding is specified for data URIs. So now only that specific parameter is supported as an encoding, and the UNKNOWN_DATA_URI_ENCODING error code has been retired. Change-Id: I7022529b0931e80a77a1120fc86c25b42e1fb3d9
112 lines
3.3 KiB
JavaScript
112 lines
3.3 KiB
JavaScript
/*! @license
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* Shaka Player
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* Copyright 2016 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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goog.provide('shaka.net.DataUriPlugin');
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goog.require('shaka.log');
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goog.require('shaka.net.NetworkingEngine');
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goog.require('shaka.util.AbortableOperation');
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goog.require('shaka.util.Error');
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goog.require('shaka.util.StringUtils');
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goog.require('shaka.util.Uint8ArrayUtils');
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/**
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* @summary A networking plugin to handle data URIs.
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* @see https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs
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* @export
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*/
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shaka.net.DataUriPlugin = class {
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/**
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* @param {string} uri
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* @param {shaka.extern.Request} request
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* @param {shaka.net.NetworkingEngine.RequestType} requestType
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* @param {shaka.extern.ProgressUpdated} progressUpdated Called when a
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* progress event happened.
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* @return {!shaka.extern.IAbortableOperation.<shaka.extern.Response>}
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* @export
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*/
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static parse(uri, request, requestType, progressUpdated) {
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try {
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const parsed = shaka.net.DataUriPlugin.parseRaw(uri);
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/** @type {shaka.extern.Response} */
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const response = {
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uri: uri,
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originalUri: uri,
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data: parsed.data,
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headers: {
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'content-type': parsed.contentType,
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},
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};
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return shaka.util.AbortableOperation.completed(response);
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} catch (error) {
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return shaka.util.AbortableOperation.failed(error);
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}
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}
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/**
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* @param {string} uri
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* @return {{data: BufferSource, contentType: string}}
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*/
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static parseRaw(uri) {
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// Extract the scheme.
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const parts = uri.split(':');
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if (parts.length < 2 || parts[0] != 'data') {
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shaka.log.error('Bad data URI, failed to parse scheme');
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throw new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.NETWORK,
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shaka.util.Error.Code.MALFORMED_DATA_URI,
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uri);
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}
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const path = parts.slice(1).join(':');
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// Extract the encoding and MIME type (required but can be empty).
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const infoAndData = path.split(',');
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if (infoAndData.length < 2) {
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shaka.log.error('Bad data URI, failed to extract encoding and MIME type');
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throw new shaka.util.Error(
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shaka.util.Error.Severity.CRITICAL,
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shaka.util.Error.Category.NETWORK,
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shaka.util.Error.Code.MALFORMED_DATA_URI,
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uri);
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}
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const info = infoAndData[0];
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const dataStr = window.decodeURIComponent(infoAndData.slice(1).join(','));
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// The MIME type is always the first thing in the semicolon-separated list
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// of type parameters. It may be blank.
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const typeInfoList = info.split(';');
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const contentType = typeInfoList[0];
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// Check for base64 encoding, which is always the last in the
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// semicolon-separated list if present.
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let base64Encoded = false;
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if (typeInfoList.length > 1 &&
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typeInfoList[typeInfoList.length - 1] == 'base64') {
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base64Encoded = true;
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typeInfoList.pop();
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}
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// Convert the data.
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/** @type {BufferSource} */
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let data;
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if (base64Encoded) {
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data = shaka.util.Uint8ArrayUtils.fromBase64(dataStr);
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} else {
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data = shaka.util.StringUtils.toUTF8(dataStr);
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}
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return {data: data, contentType};
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}
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};
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shaka.net.NetworkingEngine.registerScheme(
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'data', shaka.net.DataUriPlugin.parse);
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