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require "open3"
module Hbc
class Fetcher
TIMEOUT = 10
def self.head(url)
if url.to_s =~ %r{googlecode}
googlecode_fake_head(url)
else
SystemCommand.run("/usr/bin/curl",
args: ["--max-time", TIMEOUT, "--silent", "--location", "--head", url]).stdout
end
end
# google code does not properly respond to HTTP HEAD requests, like a jerk
# this fakes a HEAD by doing a GET, taking the first 20 lines, then running away
def self.googlecode_fake_head(url)
command = "curl --max-time #{TIMEOUT} --verbose --location '#{url}' | head -n 20 > /dev/null"
stderr = Open3.capture3(command)[1]
stderr.split("\n").grep(%r{^< }).map { |line| line.sub(%r{^< }, "") }.join("\n")
end
end
end
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