Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Re: Re: Re: download part of remote files

by merlyn (Sage)
on Mar 08, 2001 at 02:50 UTC ( #62859=note: print w/ replies, xml ) Need Help??


in reply to Re: Re: download part of remote files
in thread download part of remote files

RFC2068 (HTTP/1.1) describes a partial-content protocol. If a response comes back with "Accept-Ranges: bytes" then you may ask for "Range: bytes=-128" in a request, and get just the last 128 bytes. That'd be like this:

my $url = "http://www.server.com/filename.mp3"; use LWP::UserAgent; my $ua = LWP::UserAgent->new; use HTTP::Request::Common; my $response = $ua->simple_request(GET $url, Range => 'bytes=-128'); if ($response->is_success) { print "last 128 bytes is: ", substr($response->content, -128), "\n"; print "(although entire content was retrieved)\n" if length ($respon +se->content) > 128; }
Note that if the range request is not honored, you'll get back the entire content instead. If you wanted, you can probe first to see if the "Accept-ranges" header is in the response for that particular URL.

-- Randal L. Schwartz, Perl hacker


Comment on Re: Re: Re: download part of remote files
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://62859]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (13)
As of 2015-07-06 18:35 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (80 votes), past polls