#python#xiaodeng#判断URL是否支持断点续传？import urllib2    req = urllib2.Request('http://ftp.ubuntu.com/')  req.add_header('Range', 'bytes=0-20')res = urllib2.urlopen(req)  print res.headersprint res.headers['Content-Type']#text/html;charset=UTF-8#判断该URL是否支持断点续传？#首先由长度，其次有Range便支持断点续传～～print res.headers['Content-Length']#21print res.headers['Content-Range']#bytes 0-20/592'''Date: Mon, 02 Nov 2015 10:20:42 GMTServer: ApacheVary: Accept-EncodingContent-Range: bytes 0-20/592Content-Length: 21Connection: closeContent-Type: text/html;charset=UTF-8    '''