98 lines
2.6 KiB
Ruby
98 lines
2.6 KiB
Ruby
module Downloads
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class File
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class Error < Exception ; end
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attr_reader :tries
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attr_accessor :source, :content_type, :file_path
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def initialize(source, file_path)
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@source = source
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@file_path = file_path
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@tries = 0
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end
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def download!
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http_get_streaming do |response|
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self.content_type = response["Content-Type"]
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::File.open(file_path, "wb") do |out|
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response.read_body(out)
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end
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end
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after_download
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end
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def before_download(url, headers)
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Strategies::Base.strategies.each do |strategy|
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url, headers = strategy.new.rewrite(url, headers)
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end
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return [url, headers]
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end
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def after_download
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fix_image_board_sources
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end
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def url
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URI.parse(source)
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end
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def http_get_streaming(options = {})
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max_size = options[:max_size] || Danbooru.config.max_file_size
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max_size = nil if max_size == 0 # unlimited
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limit = 4
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while true
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unless url.is_a?(URI::HTTP) || url.is_a?(URI::HTTPS)
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raise Error.new("URL must be HTTP or HTTPS")
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end
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headers = {
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"User-Agent" => "#{Danbooru.config.safe_app_name}/#{Danbooru.config.version}"
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}
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@source, headers = before_download(source, headers)
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begin
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Net::HTTP.start(url.host, url.port, :use_ssl => url.is_a?(URI::HTTPS)) do |http|
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http.read_timeout = 10
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http.request_get(url.request_uri, headers) do |res|
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case res
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when Net::HTTPSuccess then
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if max_size
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len = res["Content-Length"]
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raise Error.new("File is too large (#{len} bytes)") if len && len.to_i > max_size
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end
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yield(res)
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return
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when Net::HTTPRedirection then
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if limit == 0 then
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raise Error.new("Too many redirects")
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end
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source = res["location"]
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limit -= 1
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else
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raise Error.new("HTTP error code: #{res.code} #{res.message}")
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end
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end # http.request_get
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end # http.start
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rescue Errno::ECONNRESET, Errno::ETIMEDOUT, Errno::EIO, Errno::EHOSTUNREACH, Errno::ECONNREFUSED, IOError => x
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@tries += 1
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if @tries < 3
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retry
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else
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raise
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end
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end
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end # while
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end # def
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def fix_image_board_sources
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if source =~ /\/src\/\d{12,}|urnc\.yi\.org|yui\.cynthia\.bne\.jp/
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@source = "Image board"
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end
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end
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end
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end
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