check if an URL exists without opening it

Andy McKay andy at
Sat Aug 10 22:22:32 CEST 2002

> You COULD try opening the URL and then abandoning the download as soon 
> as you get the first few bytes of the content, but I wouldn't advise it. 
> A huge amount of the overhead is in creating the TCP/IP connection and 
> sending HTTP headers.. if there's a reasonable chance you'll want to 
> download the contents of the URL I'd go ahead and do it.

Uses httplib and HEAD
  Andy McKay
  Agmweb Consulting

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