Python django框架 web端視頻加密的實例詳解

視頻加密流程圖:

后端獲取保利威的視頻播放授權token,提供接口api給前端

參考文檔:http://dev.polyv.net/2019/videoproduct/v-api/v-api-play/create-playsafe-token/

在utils下創建polyv.py,編寫token生成工具函數，path:utils/polyv.pyutils 是多個模塊的公共函數庫的文件夾里面存放自己開發的組件

from django.conf import settingsimport timeimport requests#pip install requestsimport hashlibclass PolyvPlayer(object): def __init__(self,userId,secretkey,tokenUrl): '''初始化，提供用戶id和秘鑰''' self.userId = userId self.secretKey = secretkey self.tokenUrl = tokenUrl def tomd5(self, value): '''取md5值''' return hashlib.md5(value.encode()).hexdigest() # 獲取視頻數據的token def get_video_token(self, videoId, viewerIp, viewerId=None, viewerName=’’, extraParams=’HTML5’): ''' :param videoId: 視頻id :param viewerId: 看視頻用戶id :param viewerIp: 看視頻用戶ip :param viewerName: 看視頻用戶昵稱 :param extraParams: 擴展參數 :param sign: 加密的sign :return: 返回點播的視頻的token ''' ts = int(time.time() * 1000) # 時間戳 plain = { 'userId': self.userId, ’videoId’: videoId, ’ts’: ts, ’viewerId’: viewerId, ’viewerIp’: viewerIp, ’viewerName’: viewerName, } # 按照ASCKII升序 key + value + key + value... + value 拼接 plain_sorted = {} key_temp = sorted(plain) for key in key_temp: plain_sorted[key] = plain[key] plain_string = ’’ for k, v in plain_sorted.items(): plain_string += str(k) + str(v) # 首尾拼接上秘鑰 sign_data = self.secretKey + plain_string + self.secretKey # 取sign_data的md5的大寫 sign = self.tomd5(sign_data).upper() # 新的帶有sign的字典 plain.update({’sign’: sign}) # python 提供的發送http請求的模塊 result = requests.post( url=self.tokenUrl, headers={'Content-type': 'application/x-www-form-urlencoded'}, data=plain # 平臺所需要攜帶的數據 ).json() # json.loads 把那拿到的數據序列化 token = {} if isinstance(result, str) else result.get('data', {}) # 如果保利威視頻平臺返回的的字符串 token={} 否則 if token == ’’: return result return token

在 項目開發時的本地配置 配置參數:配置文件settings/dev.py，代碼：

# 保利威視頻加密服務POLYV_CONFIG = { 'userId':'62dc475e3f', 'secretkey':'h6FiaEBRMU', 'tokenUrl':'https://hls.videocc.net/service/v1/token',}

保利威文檔地址:https://my.polyv.net/secure/setting/api保利威api參考文檔:http://dev.polyv.net/2019/videoproduct/v-api/v-api-play/create-playsafe-token/

urls.py，主路由代碼：

path(r’polyv/’,include(’polyv.urls’)),

在項目主應用文件夾下創建app命令:cd 主應用文件夾下python3 …/…/manage.py startapp polyv

urls.py，子路由代碼：

from django.urls import path,re_pathfrom . import viewsurlpatterns = [ path(’video/’,views.Video.as_view(),)]

polyv/views.py，視圖代碼:

from django.shortcuts import render# Create your views here.from rest_framework import statusfrom lyapi.utils.polyv import PolyvPlayerfrom rest_framework.views import APIViewfrom rest_framework.permissions import IsAuthenticatedfrom django.conf import settingsfrom rest_framework.response import Responseclass VideoView(APIView): # vid = ’348e998797383060cb19620b1c600203_3’ # permission_classes = [IsAuthenticated, ] #from rest_framework.permissions import IsAuthenticated 登錄認證 def get(self,request): polyv_obj = PolyvPlayer(settings.POLYV_CONF[’userid’],settings.POLYV_CONF[’secretKey’],settings.POLYV_CONF[’tokenUrl’]) # 調用polyv文件下的polyv_obj類 # vid = ’cee1047a76927eb43774263cd93bb69f_c’ # 存在保利威平臺的視頻ID # vid = ’348e998797383060cb19620b1c600203_3’ # 存在保利威平臺的視頻ID vid = request.query_params.get(’vid’)# 需要把保利威平臺的視頻ID存在數據庫里或者直接或者在前段直接在的Params加 vid cee1047a76927eb43774263cd93bb69f_c viewerIp = request.META.get(’REMOTE_ADDR’) # 獲取用戶訪問的IP地址 viewerId = request.user.id # 獲取用戶的id viewerName = request.user.username # 獲取用戶的賬號名 token_dict = polyv_obj.get_video_token(vid,viewerIp,viewerId,viewerName) # 調用polyv文件下的polyv_obj類下的get_video_token方法 print(token_dict) if ’code’ in list(token_dict) and token_dict[’code’] != 200: # 返回請求失敗的信息 return Response(token_dict, status=status.HTTP_403_FORBIDDEN) ’’’ 返回結果: { 'code': 403, 'status': 'error', 'message': 'invalid userId or videoId.', 'data': '' }’’’ return Response(token_dict) # 返回請求成功的信息 ’’’ 返回結果: {'token': '43883858-92a3-4f25-a6e8-701d10d88cde-f2','userId': 'cee1047a76','appId': null,'videoId': 'cee1047a76927eb43774263cd93bb69f_c','viewerIp': '127.0.0.1','viewerId': '2','viewerName': 'root','extraParams': null,'ttl': 600000,'createdTime': 1605614888570,'expiredTime': 1605615488570,'iswxa': 0,'disposable': false } ’’’

到這里后端的api接口就已經寫好啦!前段 vue界面 簡寫：在src下的components下新建一個Player.vue

# Player.vue<template> <div class='player'> <div id='player'> </div> </div></template><script>export default { name:'Player', data () { return { } }, mounted() { //如果需要對標簽進行一些加工處理，然后再放數據時，需要用mounted這個鉤子函數，如果單純的是獲取數據，添加到數據屬性中// 那么用created方法 this.get_video_data(); }, methods: { get_video_data(){ let user_name = localStorage.username || sessionStorage.username; //token認證 let token = localStorage.token || sessionStorage.token;//token認證 console.log(this.$route.params.vid) let self = this; var player = polyvPlayer({ wrap: ’#player’, width: document.documentElement.clientWidth - 300, height: document.documentElement.clientHeight, vid: this.$route.params.vid, // forceH5: true, // code: user_name, playsafe: (vid, next) =>{ console.log(self) self.$axios.get(`${self.$settings.Host}/polyv/video/?vid=${self.$route.params.vid}`,{ headers:{ ’Authorization’:’jwt ’ + token } }).then((res)=>{ // {‘token’:’asasfd’} next(res.data.token); }).catch((error)=>{ }) } }); } }, computed: { }}</script><style scoped></style>

src下的router的index.js配置url：

import Vue from ’vue’import Router from ’vue-router’import Home from ’@/components/Home’import Login from ’@/components/Login’import Register from '@/components/Register';import Course from '@/components/Course'import Detail from '@/components/Detail';import Cart from '@/components/Cart';import Order from '@/components/Order';import Player from '@/components/Player';//Player組件的url 需要復制這里,其他的url忽略import Myorder from '@/components/Myorder'; Vue.use(Router)export default new Router({ mode:’history’, routes: [ { path: ’/’, //name: ’heme’, component: Home }, { path: ’/home’, //name: ’heme’, component: Home }, { path: ’/user/login’, //name: ’heme’, component: Login }, { path: ’/register’, //name: ’heme’, component: Register }, { path: ’/courses’, //name: ’heme’, component: Course }, { path: ’/courses/detail/:id’, //name: ’heme’, component: Detail }, { path: ’/cart’, //name: ’heme’, component: Cart }, { path: ’/order’, //name: ’heme’, component: Order }, { path: ’/myorder’, //name: ’heme’, component: Myorder }, {//Player組件的url 需要復制這個括號里的,其他的url忽略 path: ’/polyv/player/:vid’, //name: ’heme’, component: Player }, ]})自己配置的 訪問路徑http://www.luffycity.cn:8080/polyv/player/cee1047a76927eb43774263cd93bb69f_c```

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