/*! @license
* Shaka Player
* Copyright 2016 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
goog.provide('shaka.net.NetworkingUtils');
goog.require('goog.Uri');
goog.require('shaka.net.NetworkingEngine');
goog.require('shaka.util.Error');
/**
* @summary Networking utility functions.
*/
shaka.net.NetworkingUtils = class {
/**
* @param {string} uri
* @param {!shaka.net.NetworkingEngine} netEngine
* @param {shaka.extern.RetryParameters} retryParams
* @return {!Promise.<string>}
*/
static async getMimeType(uri, netEngine, retryParams) {
const extension = shaka.net.NetworkingUtils.getExtension_(uri);
let mimeType =
shaka.net.NetworkingUtils.EXTENSIONS_TO_MIME_TYPES_[extension];
if (mimeType) {
return mimeType;
}
const type = shaka.net.NetworkingEngine.RequestType.MANIFEST;
const request = shaka.net.NetworkingEngine.makeRequest([uri], retryParams);
try {
request.method = 'HEAD';
const response = await netEngine.request(type, request).promise;
mimeType = response.headers['content-type'];
} catch (error) {
if (error &&
(error.code == shaka.util.Error.Code.HTTP_ERROR ||
error.code == shaka.util.Error.Code.BAD_HTTP_STATUS)) {
request.method = 'GET';
const response = await netEngine.request(type, request).promise;
mimeType = response.headers['content-type'];
}
}
// https://bit.ly/2K9s9kf says this header should always be available,
// but just to be safe:
return mimeType ? mimeType.toLowerCase().split(';').shift() : '';
}
/**
* @param {string} uri
* @return {string}
* @private
*/
static getExtension_(uri) {
const uriObj = new goog.Uri(uri);
const uriPieces = uriObj.getPath().split('/');
const uriFilename = uriPieces.pop();
const filenamePieces = uriFilename.split('.');
// Only one piece means there is no extension.
if (filenamePieces.length == 1) {
return '';
}
return filenamePieces.pop().toLowerCase();
}
};
/**
* @const {!Object.<string, string>}
* @private
*/
shaka.net.NetworkingUtils.EXTENSIONS_TO_MIME_TYPES_ = {
'mp4': 'video/mp4',
'm4v': 'video/mp4',
'm4a': 'audio/mp4',
'webm': 'video/webm',
'weba': 'audio/webm',
'mkv': 'video/webm', // Chromium browsers supports it.
'ts': 'video/mp2t',
'ogv': 'video/ogg',
'ogg': 'audio/ogg',
'mpg': 'video/mpeg',
'mpeg': 'video/mpeg',
'm3u8': 'application/x-mpegurl',
'mpd': 'application/dash+xml',
'ism': 'application/vnd.ms-sstr+xml',
'mp3': 'audio/mpeg',
'aac': 'audio/aac',
'flac': 'audio/flac',
'wav': 'audio/wav',
'sbv': 'text/x-subviewer',
'srt': 'text/srt',
'vtt': 'text/vtt',
'webvtt': 'text/vtt',
'ttml': 'application/ttml+xml',
'lrc': 'application/x-subtitle-lrc',
'ssa': 'text/x-ssa',
'ass': 'text/x-ssa',
'jpg': 'image/jpeg',
'png': 'image/png',
'svg': 'image/svg+xml',
'webp': 'image/webp',
'avif': 'image/avif',
};