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from django.shortcuts import render
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from django.http import StreamingHttpResponse
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from index.models import *
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# 歌曲播放页面
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def playView(request, song_id):
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# 热搜歌曲
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search_song = Dynamic.objects.select_related('song').order_by('-dynamic_search').all()[:6]
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# 歌曲信息
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song_info = Song.objects.get(song_id=int(song_id))
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# 播放列表
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play_list = request.session.get('play_list', [])
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song_exist = False
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if play_list:
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for i in play_list:
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if int(song_id) == i['song_id']:
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song_exist = True
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if song_exist == False:
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play_list.append({'song_id': int(song_id), 'song_singer': song_info.song_singer, 'song_name': song_info.song_name, 'song_time': song_info.song_time})
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request.session['play_list'] = play_list
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# 歌词
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if song_info.song_lyrics != '暂无歌词':
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f = open('static/songLyric/' +song_info.song_lyrics, 'r', encoding='utf-8')
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song_lyrics = f.read()
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f.close()
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# 相关歌曲
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song_type = Song.objects.values('song_type').get(song_id=song_id)['song_type']
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song_relevant = Dynamic.objects.select_related('song').filter(song__song_type=song_type).order_by('-dynamic_plays').all()[:6]
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# 添加播放次数
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# 扩展功能：可使用session实现每天只添加一次播放次数
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dynamic_info = Dynamic.objects.filter(song_id=int(song_id)).first()
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# 判断歌曲动态信息是否存在，存在就在原来基础上加1
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if dynamic_info:
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dynamic_info.dynamic_plays += 1
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dynamic_info.save()
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# 动态信息不存在则创建新的动态信息
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else:
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dynamic_info = Dynamic(dynamic_plays=1, dynamic_search=0, dynamic_down=0, song_id=song_id)
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dynamic_info.save()
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return render(request, 'play.html', locals())
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# 歌曲下载
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def downloadView(request, song_id):
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# 根据song_id查找歌曲信息
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song_info = Song.objects.get(song_id=int(song_id))
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# 添加下载次数
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dynamic_info = Dynamic.objects.filter(song_id=int(song_id)).first()
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# 判断歌曲动态信息是否存在，存在就在原来基础上加1
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if dynamic_info:
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dynamic_info.dynamic_down += 1
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dynamic_info.save()
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# 动态信息不存在则创建新的动态信息
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else:
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dynamic_info = Dynamic(dynamic_plays=0,dynamic_search=0,dynamic_down=1,song_id=song_id)
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dynamic_info.save()
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# 读取文件内容
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file = 'static/songFile/' + song_info.song_file
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def file_iterator(file, chunk_size=512):
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with open(file, 'rb') as f:
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while True:
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c = f.read(chunk_size)
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if c:
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yield c
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else:
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break
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# 将文件内容写入StreamingHttpResponse对象，并以字节流方式返回给用户，实现文件下载
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filename = str(song_id) + '.mp3'
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response = StreamingHttpResponse(file_iterator(file))
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response['Content-Type'] = 'application/octet-stream'
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response['Content-Disposition'] = 'attachment; filename="%s"' %(filename)
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return response |
