Django 中的字节范围[关闭]

Django是一个流行的Python Web框架，广泛应用于开发各种类型的网站和Web应用程序。在Django中，字节范围是一个重要的概念，它允许我们在处理文件上传和下载时，对文件的字节进行操作和控制。本文将介绍Django中的字节范围的概念，并提供一个案例代码来演示其使用。

python
from django.http import HttpResponse, FileResponse
from django.views.decorators.http import condition
@condition(etag_func=None)
def video_stream(request):
    video_file = open('path/to/video.mp4', 'rb')
    response = FileResponse(video_file, content_type='video/mp4')
    response['Accept-Ranges'] = 'bytes'
    
    if 'Range' in request.headers:
        range_header = request.headers['Range']
        content_size = os.path.getsize('path/to/video.mp4')
        start, end = parse_range_header(range_header, content_size)
        
        if start is not None and end is not None:
            response['Content-Range'] = 'bytes %d-%d/%d' % (start, end, content_size)
            response['Content-Length'] = str(end - start + 1)
            video_file.seek(start)
    
    return response
def parse_range_header(range_header, content_size):
    range_match = re.match(r'bytes=(\d+)-(\d*)', range_header)
    
    if range_match:
        start = int(range_match.group(1))
        end = int(range_match.group(2)) if range_match.group(2) else content_size - 1
        return start, end
    
    return None, None