Created
May 19, 2010 00:49
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# Easy download examples | |
# | |
# First example, downloads 10 files from the same server sequencially using the same | |
# easy handle with a persistent connection | |
# | |
# Second example, sends all 10 requests in parallel using 10 easy handles | |
# | |
$:.unshift(File.expand_path(File.join(File.dirname(__FILE__), '..', 'ext'))) | |
$:.unshift(File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib'))) | |
require 'curb' | |
urls = ['http://www.cnn.com/', | |
'http://www.cnn.com/video/', | |
'http://newspulse.cnn.com/', | |
'http://www.cnn.com/US/', | |
'http://www.cnn.com/WORLD/', | |
'http://www.cnn.com/POLITICS/', | |
'http://www.cnn.com/JUSTICE/', | |
'http://www.cnn.com/SHOWBIZ/', | |
'http://www.cnn.com/TECH/', | |
'http://www.cnn.com/HEALTH/'] | |
def cleanup(urls) | |
urls.each do|url| | |
filename = url.split(/\?/).first.split(/\//).last | |
File.unlink(filename) if File.exist?(filename) | |
end | |
end | |
# first sequential | |
def fetch_sequential(urls) | |
easy = Curl::Easy.new | |
easy.follow_location = true | |
urls.each do|url| | |
easy.url = url | |
filename = url.split(/\?/).first.split(/\//).last | |
print "'#{url}' :" | |
File.open(filename, 'wb') do|f| | |
easy.on_progress {|dl_total, dl_now, ul_total, ul_now| print "="; true } | |
easy.on_body {|data| f << data; data.size } | |
easy.perform | |
puts "=> '#{filename}'" | |
end | |
end | |
end | |
# using multi interface | |
def fetch_parallel(urls) | |
Curl::Multi.download(urls){|c,code,method| | |
filename = c.url.split(/\?/).first.split(/\//).last | |
puts filename | |
} | |
end | |
fetch_sequential(urls) | |
cleanup(urls) | |
fetch_parallel(urls) |
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