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* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and contributor
* rights, including patent rights, and no such rights are granted under this license.
*
* Copyright (c) 2013, Dash Industry Forum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * Neither the name of Dash Industry Forum nor the names of its
* contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @class
* @ignore
*/
import path from 'path-browserify'
import {UAParser} from 'ua-parser-js'
import Constants from '../streaming/constants/Constants.js';
class Utils {
static mixin(dest, source, copy) {
let s;
let empty = {};
if (dest) {
for (let name in source) {
if (source.hasOwnProperty(name)) {
s = source[name];
if (!(name in dest) || (dest[name] !== s && (!(name in empty) || empty[name] !== s))) {
if (typeof dest[name] === 'object' && dest[name] !== null) {
dest[name] = Utils.mixin(dest[name], s, copy);
} else {
dest[name] = copy(s);
}
}
}
}
}
return dest;
}
static clone(src) {
if (!src || typeof src !== 'object') {
return src; // anything
}
if (src instanceof RegExp) {
return new RegExp(src);
}
let r;
if (src instanceof Array) {
// array
r = [];
for (let i = 0, l = src.length; i < l; ++i) {
if (i in src) {
r.push(Utils.clone(src[i]));
}
}
} else {
r = {};
}
return Utils.mixin(r, src, Utils.clone);
}
static addAdditionalQueryParameterToUrl(url, params) {
try {
if (!params || params.length === 0) {
return url;
}
let updatedUrl = url;
params.forEach(({ key, value }) => {
const separator = updatedUrl.includes('?') ? '&' : '?';
updatedUrl += `${separator}${(encodeURIComponent(key))}=${(encodeURIComponent(value))}`;
});
return updatedUrl;
} catch (e) {
return url;
}
}
static removeQueryParameterFromUrl(url, queryParameter) {
if (!url || !queryParameter) {
return url;
}
// Parse the URL
const parsedUrl = new URL(url);
// Get the search parameters
const params = new URLSearchParams(parsedUrl.search);
if (!params || params.size === 0 || !params.has(queryParameter)) {
return url;
}
// Remove the queryParameter
params.delete(queryParameter);
// Manually reconstruct the query string without re-encoding
const queryString = Array.from(params.entries())
.map(([key, value]) => `${key}=${value}`)
.join('&');
// Reconstruct the URL
const baseUrl = `${parsedUrl.origin}${parsedUrl.pathname}`;
return queryString ? `${baseUrl}?${queryString}` : baseUrl;
}
static parseHttpHeaders(headerStr) {
let headers = {};
if (!headerStr) {
return headers;
}
// Trim headerStr to fix a MS Edge bug with xhr.getAllResponseHeaders method
// which send a string starting with a "\n" character
let headerPairs = headerStr.trim().split('\u000d\u000a');
for (let i = 0, ilen = headerPairs.length; i < ilen; i++) {
let headerPair = headerPairs[i];
let index = headerPair.indexOf('\u003a\u0020');
if (index > 0) {
headers[headerPair.substring(0, index)] = headerPair.substring(index + 2);
}
}
return headers;
}
/**
* Parses query parameters from a string and returns them as an array of key-value pairs.
* @param {string} queryParamString - A string containing the query parameters.
* @return {Array<{key: string, value: string}>} An array of objects representing the query parameters.
*/
static parseQueryParams(queryParamString) {
const params = [];
const searchParams = new URLSearchParams(queryParamString);
for (const [key, value] of searchParams.entries()) {
params.push({ key: decodeURIComponent(key), value: decodeURIComponent(value) });
}
return params;
}
static generateUuid() {
let dt = new Date().getTime();
const uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
const r = (dt + Math.random() * 16) % 16 | 0;
dt = Math.floor(dt / 16);
return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
});
return uuid;
}
static generateHashCode(string) {
let hash = 0;
if (string.length === 0) {
return hash;
}
for (let i = 0; i < string.length; i++) {
const chr = string.charCodeAt(i);
hash = ((hash << 5) - hash) + chr;
hash |= 0;
}
return hash;
}
/**
* Compares both urls and returns a relative url (target relative to original)
* @param {string} originalUrl
* @param {string} targetUrl
* @return {string|*}
*/
static getRelativeUrl(originalUrl, targetUrl) {
try {
const original = new URL(originalUrl);
const target = new URL(targetUrl);
// Unify the protocol to compare the origins
original.protocol = target.protocol;
if (original.origin !== target.origin) {
return targetUrl;
}
// Use the relative path implementation of the path library. We need to cut off the actual filename in the end to get the relative path
let relativePath = path.relative(original.pathname.substr(0, original.pathname.lastIndexOf('/')), target.pathname.substr(0, target.pathname.lastIndexOf('/')));
// In case the relative path is empty (both path are equal) return the filename only. Otherwise add a slash in front of the filename
const startIndexOffset = relativePath.length === 0 ? 1 : 0;
relativePath += target.pathname.substr(target.pathname.lastIndexOf('/') + startIndexOffset, target.pathname.length - 1);
// Build the other candidate, e.g. the 'host relative' path that starts with "/", and return the shortest of the two candidates.
if (target.pathname.length < relativePath.length) {
return target.pathname;
}
return relativePath;
} catch (e) {
return targetUrl
}
}
static getHostFromUrl(urlString) {
try {
const url = new URL(urlString);
return url.host
} catch (e) {
return null
}
}
static parseUserAgent(ua = null) {
try {
const uaString = ua === null ? typeof navigator !== 'undefined' ? navigator.userAgent.toLowerCase() : '' : '';
return UAParser(uaString);
} catch (e) {
return {};
}
}
/**
* Checks for existence of "http" or "https" in a string
* @param string
* @returns {boolean}
*/
static stringHasProtocol(string) {
return (/(http(s?)):\/\//i.test(string))
}
static bufferSourceToDataView(bufferSource) {
return Utils.toDataView(bufferSource, DataView);
}
static bufferSourceToInt8(bufferSource) {
return Utils.toDataView(bufferSource, Uint8Array)
}
static uint8ArrayToString(uint8Array) {
const decoder = new TextDecoder('utf-8');
return decoder.decode(uint8Array);
}
static bufferSourceToHex(data) {
const arr = Utils.bufferSourceToInt8(data)
let hex = '';
for (let value of arr) {
value = value.toString(16);
if (value.length === 1) {
value = '0' + value;
}
hex += value;
}
return hex;
}
static toDataView(bufferSource, Type) {
const buffer = Utils.getArrayBuffer(bufferSource);
let bytesPerElement = 1;
if ('BYTES_PER_ELEMENT' in DataView) {
bytesPerElement = DataView.BYTES_PER_ELEMENT;
}
const dataEnd = ((bufferSource.byteOffset || 0) + bufferSource.byteLength) /
bytesPerElement;
const rawStart = ((bufferSource.byteOffset || 0)) / bytesPerElement;
const start = Math.floor(Math.max(0, Math.min(rawStart, dataEnd)));
const end = Math.floor(Math.min(start + Math.max(Infinity, 0), dataEnd));
return new Type(buffer, start, end - start);
}
static getArrayBuffer(view) {
if (view instanceof ArrayBuffer) {
return view;
} else {
return view.buffer;
}
}
static getCodecFamily(codecString) {
const { base, profile } = Utils._getCodecParts(codecString)
switch (base) {
case 'mp4a':
switch (profile) {
case '69':
case '6b':
case '40.34':
return Constants.CODEC_FAMILIES.MP3
case '66':
case '67':
case '68':
case '40.2':
case '40.02':
case '40.5':
case '40.05':
case '40.29':
case '40.42':
return Constants.CODEC_FAMILIES.AAC
case 'a5':
return Constants.CODEC_FAMILIES.AC3
case 'e6':
return Constants.CODEC_FAMILIES.EC3
case 'b2':
return Constants.CODEC_FAMILIES.DTSX
case 'a9':
return Constants.CODEC_FAMILIES.DTSC
}
break;
case 'avc1':
case 'avc3':
return Constants.CODEC_FAMILIES.AVC
case 'hvc1':
case 'hvc3':
return Constants.CODEC_FAMILIES.HEVC
default:
return base
}
return base;
}
static _getCodecParts(codecString) {
const [base, ...rest] = codecString.split('.');
const profile = rest.join('.');
return { base, profile };
}
}
export default Utils;
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