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    len(response.content)? By the time you've got the response, you have downloaded the whole content. Commented Jul 7, 2017 at 12:51
  • the content page is large. For this i need to download the whole content. Commented Jul 8, 2017 at 9:06
  • If you're making a GET you're doing that anyway. Maybe try a HEAD (see stackoverflow.com/questions/3854842/…) but if the server doesn't provide the Content-Length with it you're out of options. Commented Jul 8, 2017 at 10:23