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https://github.com/develop202/migu_video.git
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ddCalcu
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@@ -1,3 +1,22 @@
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const list = {
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"h5": {
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// 第11位字母
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"keys": "yzwxcdabgh",
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// 第5 8 14位字母对应下标0 1 3
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"words": ['z', 'y', '0', 'w'],
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// 第11位字母替换位置
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"thirdReplaceIndex": 1,
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// 加密后链接后缀
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"suffix": "&sv=10000&ct=www"
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},
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"android": {
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"keys": "cdabyzwxkl",
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"words": ['x', 'a', '0', 'a'],
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"thirdReplaceIndex": 6,
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"suffix": "&sv=10004&ct=android"
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}
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}
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const importObj = {
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a: {
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a: (a, b, c) => { },
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@@ -71,4 +90,100 @@ function getEncryptURL(exports, videoURL) {
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return encrypt(videoURL, memoryView, getEncrypt)
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}
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export { initWasm, getEncryptURL }
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/**
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* 获取ddCalcu
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* 大致思路:把puData最后一个字符和第一个字符拼接,然后拼接倒数第二个跟第二个,一直循环,当第1 2 3 4次(从0开始)循环时需要插入特殊标识字符
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* 特殊字符:四个特殊字符位置是第5 8 11 14,第5 8 14是根据平台确定的,且各个节目都一样。第11位在h5上是根据节目ID第1位(从0开始,android是第6位)数字为下标的某字符串的值
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* 在android,标清画质还有区分,第5位字符需要修改,其他不变
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* @param {string} puData - 服务器返回的那个东东
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* @param {string} programId - 节目ID
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* @param {string} clientType - 平台类型 h5 android
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* @param {string} rateType - 清晰度 2:标清 3:高清 4:蓝光
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* @returns {string} - ddCalcu
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*/
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function getddCalcu(puData, programId, clientType, rateType) {
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if (puData == null || puData == undefined) {
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return ""
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}
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if (programId == null || programId == undefined) {
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return ""
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}
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if (clientType != "android" && clientType != "h5") {
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return ""
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}
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if (rateType == null || rateType == undefined) {
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return ""
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}
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let keys = list[clientType].keys
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let words = list[clientType].words
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const thirdReplaceIndex = list[clientType].thirdReplaceIndex
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// android平台标清
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if (clientType == "android" && rateType == "2") {
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words[0] = "v"
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}
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puData = puData.split("");
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keys = keys.split("")
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const puDataLength = puData.length
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programId = programId.split("")
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let ddCalcu = []
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for (let i = 0; i < puDataLength / 2; i++) {
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ddCalcu.push(puData[puDataLength - i - 1])
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ddCalcu.push(puData[i])
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switch (i) {
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case 1:
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ddCalcu.push(words[i - 1])
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break;
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case 2:
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ddCalcu.push(words[i - 1])
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break;
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case 3:
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ddCalcu.push(keys[programId[thirdReplaceIndex]])
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break;
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case 4:
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ddCalcu.push(words[i - 1])
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break;
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}
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}
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return ddCalcu.join("")
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}
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/**
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* 加密链接
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* @param {string} puDataURL - 加密前链接
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* @param {string} programId - 节目ID
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* @param {string} clientType - 客户端类型 h5 android
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* @param {string} rateType - 清晰度 2:标清 3:高清 4:蓝光
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* @returns {string} - 加密链接
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*/
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function getddCalcuURL(puDataURL, programId, clientType, rateType) {
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if (puDataURL == null || puDataURL == undefined) {
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return ""
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}
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if (programId == null || programId == undefined) {
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return ""
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}
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if (clientType != "android" && clientType != "h5") {
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return ""
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}
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if (rateType == null || rateType == undefined) {
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return ""
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}
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const puData = puDataURL.split("&puData=")[1]
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const ddCalcu = getddCalcu(puData, programId, clientType, rateType)
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const suffix = list[clientType].suffix
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return `${puDataURL}&ddCalcu=${ddCalcu}${suffix}`
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}
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export { initWasm, getEncryptURL, getddCalcuURL }
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