173/174-路飛14&15-課程詳情介面/前臺&區間過濾
阿新 • • 發佈：2021-01-16
今日內容
1 課程詳情介面，課程章節介面
1 查詢所有課程介面
2 查詢單個課程介面
-繼續再查詢所有介面上寫
-再寫一個檢視類，單獨寫查詢課程詳情介面
4 寫課程章節介面，每個章節下有很多課程
Linux從入門到精通
第一章節：入門
1 安裝環境
2 配置環境
3 放棄
第二章節：入土
1 哇肯惡搞
2 挖坑
Python從入門到精通
第一章節：入門
1 課程詳情介面
class CourseView(GenericViewSet, ListModelMixin,RetrieveModelMixin):
queryset = Course.objects.filter(is_delete=False, is_show=True).order_by('-orders')
serializer_class =CourseSerializer
filter_backends = 課程章節介面(views.py)
class ChapterViewSet(GenericViewSet,ListModelMixin):
queryset = CourseChapter.objects.filter(is_show=True,is_delete= 序列化類
## 課時序列化類
class CourseSectionSerializer(serializers.ModelSerializer):
class Meta:
model = CourseSection
fields='__all__'
# 課程章節序列化類
class CourseChapterSerializer(serializers.ModelSerializer):
# 子序列化,課時是多條，一定要寫many=True
coursesections=CourseSectionSerializer(many=True)
class Meta:
model = CourseChapter
fields=['course','chapter','name','summary','pub_date','coursesections']
路由
router.register('chapters',ChapterViewSet,'ChapterViewSet')
2 課程詳情前臺
# 取路徑中的值
mounted() {
//http://localhost:8080/course/detail/79?name=lqz&age=18
console.log(this.$route.params) //打印出{pk：79}
console.log(this.$route.query)//打印出{name：lqz,age:18}
},
3 七牛雲物件儲存託管視訊
1 視訊檔案，圖片檔案之前儲存在自己伺服器
2 搭建自己的儲存伺服器（fastdfs，go-fastdfs）
-https://sjqzhang.github.io/go-fastdfs/usage.html#python
-docekr 拉起一個來 http://10.1.5.9:8080/group1/upload
import requests
url = 'http://10.1.5.9:8080/group1/upload'
files = {'file': open('report.xls', 'rb')}
options={'output':'json','path':'','scene':''} #參閱瀏覽器上傳的選項
r = requests.post(url,data=options, files=files)
print(r.text)
3 第三方雲端儲存（阿里雲oss，七牛雲端儲存。。。。）
七牛雲託管視訊（go語言的踐行者）
# from qiniu import Auth, put_file, etag
# import qiniu.config
# #需要填寫你的 Access Key 和 Secret Key
# access_key = '-BoMxfk8dxgDq87mA-qLkgmI_AHYfF27tOFan_NJ'
# secret_key = 'Wijh6Fg6gedtBqoqKElkxrrlySoiVWbFSfQ6I-qM'
# #構建鑑權物件
# q = Auth(access_key, secret_key)
# #要上傳的空間
# bucket_name = 'lqz'
# #上傳後儲存的檔名
# key = 'lqz.mp4'
# #生成上傳 Token，可以指定過期時間等
# token = q.upload_token(bucket_name, key, 3600)
# #要上傳檔案的本地路徑
# localfile = './6-測試功能.mp4'
# ret, info = put_file(token, key, localfile)
# print(info)
# assert ret['key'] == key
# assert ret['hash'] == etag(localfile)
# 刪除視訊
# from qiniu import Auth
# from qiniu import BucketManager
# access_key = '-BoMxfk8dxgDq87mA-qLkgmI_AHYfF27tOFan_NJ'
# secret_key = 'Wijh6Fg6gedtBqoqKElkxrrlySoiVWbFSfQ6I-qM'
# #初始化Auth狀態
# q = Auth(access_key, secret_key)
# #初始化BucketManager
# bucket = BucketManager(q)
# #你要測試的空間， 並且這個key在你空間中存在
# bucket_name = 'lqz'
# key = 'lqz.mp4'
# #刪除bucket_name 中的檔案 key
# ret, info = bucket.delete(bucket_name, key)
# print(info)
# import requests
#
#
# res=requests.get('https://vd3.bdstatic.com/mda-kkena9xzt4hmb7b7/sc/cae_h264_clips/1605430730/mda-kkena9xzt4hmb7b7.mp4?auth_key=1610529585-0-0-14a58ce4cca097b0a5c823cc506d95da&bcevod_channel=searchbox_feed&pd=1&pt=3&abtest=8656_1')
# with open('致命誘惑.mp4','wb') as f:
# for line in res.iter_content():
# f.write(line)
'''
通過該程式下載的視訊和音訊是分成連個檔案的，沒有合成，
視訊為：視訊名_video.mp4
音訊為：視訊名_audio.mp4
修改url的值，換成自己想下載的頁面節課
'''
# 匯入requests模組，模擬傳送請求
import requests
# 匯入json
import json
# 匯入re
import re
# 定義請求頭
headers = {
'Accept': '*/*',
'Accept-Language': 'en-US,en;q=0.5',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36'
}
# 正則表示式，根據條件匹配出值
def my_match(text, pattern):
match = re.search(pattern, text)
print(match.group(1))
print()
return json.loads(match.group(1))
def download_video(old_video_url, video_url, audio_url, video_name):
headers.update({"Referer": old_video_url})
print("開始下載視訊：%s" % video_name)
video_content = requests.get(video_url, headers=headers)
print('%s視訊大小：' % video_name, video_content.headers['content-length'])
audio_content = requests.get(audio_url, headers=headers)
print('%s音訊大小：' % video_name, audio_content.headers['content-length'])
# 下載視訊開始
received_video = 0
with open('%s_video.mp4' % video_name, 'ab') as output:
while int(video_content.headers['content-length']) > received_video:
headers['Range'] = 'bytes=' + str(received_video) + '-'
response = requests.get(video_url, headers=headers)
output.write(response.content)
received_video += len(response.content)
# 下載視訊結束
# 下載音訊開始
audio_content = requests.get(audio_url, headers=headers)
received_audio = 0
with open('%s_audio.mp4' % video_name, 'ab') as output:
while int(audio_content.headers['content-length']) > received_audio:
# 視訊分片下載
headers['Range'] = 'bytes=' + str(received_audio) + '-'
response = requests.get(audio_url, headers=headers)
output.write(response.content)
received_audio += len(response.content)
# 下載音訊結束
return video_name
if __name__ == '__main__':
# 換成你要爬取的視訊地址
url = 'https://www.bilibili.com/video/BV1TA411H7gQ'
# 傳送請求，拿回資料
res = requests.get(url, headers=headers)
# 視訊詳情json
playinfo = my_match(res.text, '__playinfo__=(.*?)</script><script>')
# 視訊內容json
initial_state = my_match(res.text, r'__INITIAL_STATE__=(.*?);\(function\(\)')
# 視訊分多種格式，直接取解析度最高的視訊 1080p
video_url = playinfo['data']['dash']['video'][0]['baseUrl']
# 取出音訊地址
audio_url = playinfo['data']['dash']['audio'][0]['baseUrl']
video_name = initial_state['videoData']['title']
print('視訊名字為：video_name')
print('視訊地址為：', video_url)
print('音訊地址為：', audio_url)
download_video(url, video_url, audio_url, video_name)
4 區間過濾
1 查詢課程價格大於30小於90的課程
http://127.0.0.1:8000/course/free/?price_ge=30&price_lt=90
2 寫一個過濾類，配置在檢視類中
filter_backends = [SearchByPrice]
3 通過擴寫django-filter來實現該功能