Created
June 27, 2010 13:55
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Ruby HTTP file download with progress measurement
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| require 'net/http' | |
| require 'uri' | |
| def download(url) | |
| Thread.new do | |
| thread = Thread.current | |
| body = thread[:body] = [] | |
| url = URI.parse url | |
| Net::HTTP.new(url.host, url.port).request_get(url.path) do |response| | |
| length = thread[:length] = response['Content-Length'].to_i | |
| response.read_body do |fragment| | |
| body << fragment | |
| thread[:done] = (thread[:done] || 0) + fragment.length | |
| thread[:progress] = thread[:done].quo(length) * 100 | |
| end | |
| end | |
| end | |
| end | |
| thread = download 'http://caesar.acc.umu.se/mirror/ubuntu-releases/10.04/ubuntu-10.04-desktop-i386.iso' | |
| puts "%.2f%%" % thread[:progress].to_f until thread.join 1 |
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Interestingly, it appears that you can use open-uri to have a "callback" as well: http://www.ruby-doc.org/stdlib-1.9.3/libdoc/open-uri/rdoc/OpenURI/OpenRead.html :progress_proc if that helps any followers. (open-uri for instance followers redirects, whereas net/http doesn't, so may be a better fit).