# frozen_string_literal: true
module Bundler
class Fetcher
class Downloader
attr_reader :connection
attr_reader :redirect_limit
def initialize(connection, redirect_limit)
@connection = connection
@redirect_limit = redirect_limit
end
def fetch(uri, headers = {}, counter = 0)
raise HTTPError, "Too many redirects" if counter >= redirect_limit
response = request(uri, headers)
Bundler.ui.debug("HTTP #{response.code} #{response.message} #{uri}")
case response
when Net::HTTPSuccess, Net::HTTPNotModified
response
when Net::HTTPRedirection
new_uri = URI.parse(response["location"])
if new_uri.host == uri.host
new_uri.user = uri.user
new_uri.password = uri.password
end
fetch(new_uri, headers, counter + 1)
when Net::HTTPRequestedRangeNotSatisfiable
new_headers = headers.dup
new_headers.delete("Range")
new_headers["Accept-Encoding"] = "gzip"
fetch(uri, new_headers)
when Net::HTTPRequestEntityTooLarge
raise FallbackError, response.body
when Net::HTTPUnauthorized
raise AuthenticationRequiredError, uri.host
when Net::HTTPNotFound
raise FallbackError, "Net::HTTPNotFound"
else
raise HTTPError, "#{response.class}#{": #{response.body}" unless response.body.empty?}"
end
end
def request(uri, headers)
validate_uri_scheme!(uri)
Bundler.ui.debug "HTTP GET #{uri}"
req = Net::HTTP::Get.new uri.request_uri, headers
if uri.user
user = CGI.unescape(uri.user)
password = uri.password ? CGI.unescape(uri.password) : nil
req.basic_auth(user, password)
end
connection.request(uri, req)
rescue NoMethodError => e
raise unless ["undefined method", "use_ssl="].all? {|snippet| e.message.include? snippet }
raise LoadError.new("cannot load such file -- openssl")
rescue OpenSSL::SSL::SSLError
raise CertificateFailureError.new(uri)
rescue *HTTP_ERRORS => e
Bundler.ui.trace e
case e.message
when /host down:/, /getaddrinfo: nodename nor servname provided/
raise NetworkDownError, "Could not reach host #{uri.host}. Check your network " \
"connection and try again."
else
raise HTTPError, "Network error while fetching #{URICredentialsFilter.credential_filtered_uri(uri)}" \
" (#{e})"
end
end
private
def validate_uri_scheme!(uri)
return if uri.scheme =~ /\Ahttps?\z/
raise InvalidOption,
"The request uri `#{uri}` has an invalid scheme (`#{uri.scheme}`). " \
"Did you mean `http` or `https`?"
end
end
end
end
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