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Merge pull request #213 from krauselukas/images-xml
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Add images.xml with adjustments to pass rubocop rules
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@dmacvicar
dmacvicar committed Feb 20, 2018
2 parents 90202cd + b1dfbc1 commit 39edc45
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68 changes: 68 additions & 0 deletions app/controllers/images_controller.rb
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require 'open-uri'
require 'nokogiri'

# Controller for /images.xml
class ImagesController < ApplicationController
attr_accessor :base_url

def initialize
@base_url = "http://download.opensuse.org"
end

class MetadataError < RuntimeError; end

# GET /images.xml
def images; end

# Returns the first capture of regex applied to the file name of URL's redirection target
def get_version(url, regex)
abs_url = @base_url + url
Rails.cache.fetch("/build_number/#{abs_url}", expires_in: 10.minutes) do
begin
meta = meta_file(abs_url)
name_elem = meta.xpath("//m:metalink//m:file//@name", 'm' => 'urn:ietf:params:xml:ns:metalink').to_s
matches = regex.match(name_elem.to_s)
matches[1]
rescue OpenURI::HTTPError, RuntimeError => e
filename = File.basename(URI.parse(abs_url).path)
raise MetadataError, "Could not get version of #{filename}: #{e}"
end
end
end

# Returns a string containing a XML <image> element with all necessary content for url and name
def image_element(url, name)
abs_url = @base_url + url
size = content_size(abs_url)

ret = "<image url=#{abs_url.encode(xml: :attr)} name=#{name.encode(xml: :attr)} size=\"#{size}\">\n"
ret += "<checksum type=\"sha256\" disposition=#{(abs_url + '.sha256').encode(xml: :attr)}/>\n"
ret += "</image>"
ret.html_safe
end

helper_method :get_version
helper_method :image_element

protected

# Returns the content size of url
def content_size(url)
Rails.cache.fetch("/content_size/#{url}", expires_in: 10.minutes) do
begin
meta = meta_file(url)
size_text = meta.xpath("//m:metalink//m:file//m:size[1]//text()", 'm' => 'urn:ietf:params:xml:ns:metalink')
size = Integer(size_text.to_s)
size
rescue OpenURI::HTTPError, RuntimeError
# This is actualy gibibytes, not gigabytes
return 5.gigabytes
end
end
end

# Returns a Nokogiri XML document of the mirrorbrain metadata for url
def meta_file(url)
Nokogiri::XML(open(url + '.meta4'))
end
end
103 changes: 103 additions & 0 deletions app/views/images/images.xml.erb
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<%
leap_versions = ['42.3', '42.2']
leap_current = '42.3'
leap_snapshot = '15.0'

if leap_snapshot != '' then
leap_snapshot_build = get_version("/distribution/leap/#{leap_snapshot}/iso/openSUSE-Leap-#{leap_snapshot}-DVD-x86_64-Current.iso", /Build([0-9.]+)-/)
end

tw_snapshot = get_version('/tumbleweed/iso/openSUSE-Tumbleweed-DVD-x86_64-Current.iso', /Snapshot(\d+)-/)
%>
<?xml version="1.0" encoding="UTF-8"?>
<decision name="<%= _("Distribution") %>">
<% leap_versions.each do |leap_version| %>
<option name="openSUSE Leap <%= leap_version %>" preselected="<%= leap_version == leap_current ? 'true' : 'false' %>">
<decision name="<%= _("Installation Source") %>">
<option name="<%= _("DVD") %>" preselected="true">
<%= image_element("/distribution/leap/#{leap_version}/iso/openSUSE-Leap-#{leap_version}-DVD-x86_64.iso", _("Leap %s DVD") % leap_version) %>
</option>
<option name="<%= _("Network") %>">
<%= image_element("/distribution/leap/#{leap_version}/iso/openSUSE-Leap-#{leap_version}-NET-x86_64.iso", _("Leap %s Network Installation") % leap_version) %>
</option>
</decision>
</option>
<% end -%>
<option name="<%= _("openSUSE Tumbleweed") %>">
<decision name="<%= _("Medium") %>">
<option name="<%= _("Installation") %>" preselected="true">
<decision name="<%= _("Source") %>">
<option name="<%= _("DVD") %>" preselected="true">
<decision name="<%= _("Architecture") %>">
<option name="<%= _("i586") %>">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-DVD-i586-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s DVD (i586)") % tw_snapshot) %>
</option>
<option name="<%= _("x86_64") %>" preselected="true">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-DVD-x86_64-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s DVD (x86_64)") % tw_snapshot) %>
</option>
</decision>
</option>
<option name="<%= _("Network") %>">
<decision name="<%= _("Architecture") %>">
<option name="<%= _("i586") %>">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-NET-i586-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s Network Installation (i586)") % tw_snapshot) %>
</option>
<option name="<%= _("x86_64") %>" preselected="true">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-NET-x86_64-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s Network Installation (x86_64)") % tw_snapshot) %>
</option>
</decision>
</option>
</decision>
</option>
<option name="<%= _("Live") %>">
<decision name="<%= _("Desktop") %>">
<option name="GNOME">
<decision name="<%= _("Architecture") %>">
<option name="<%= _("i586") %>">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-GNOME-Live-i686-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s GNOME Live (i686)") % tw_snapshot) %>
</option>
<option name="<%= _("x86_64") %>" preselected="true">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-GNOME-Live-x86_64-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s GNOME Live (x86_64)") % tw_snapshot) %>
</option>
</decision>
</option>
<option name="KDE" preselected="true">
<decision name="<%= _("Architecture") %>">
<option name="<%= _("i586") %>">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-KDE-Live-i686-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s KDE Live (i686)") % tw_snapshot) %>
</option>
<option name="<%= _("x86_64") %>" preselected="true">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-KDE-Live-x86_64-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s KDE Live (x86_64)") % tw_snapshot) %>
</option>
</decision>
</option>
<option name="<%= _("Rescue") %>">
<decision name="<%= _("Architecture") %>">
<option name="<%= _("i586") %>">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-Rescue-CD-i686-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s Rescue CD (i686)") % tw_snapshot) %>
</option>
<option name="<%= _("x86_64") %>" preselected="true">
<%= image_element("/tumbleweed/iso/openSUSE-Tumbleweed-Rescue-CD-x86_64-Snapshot#{tw_snapshot}-Media.iso", _("Tumbleweed %s Rescue CD (x86_64)") % tw_snapshot) %>
</option>
</decision>
</option>
</decision>
</option>
</decision>
</option>
<% if leap_snapshot != "" then %>
<option name="openSUSE Leap <%= leap_snapshot %> (In development)">
<decision name="<%= _("Installation Source") %>">
<option name="<%= _("DVD") %>" preselected="true">
<%= image_element("/distribution/leap/#{leap_snapshot}/iso/openSUSE-Leap-#{leap_snapshot}-DVD-x86_64-Build#{leap_snapshot_build}-Media.iso",
_("Leap %s DVD (Build %s)") % [leap_snapshot, leap_snapshot_build]) %>
</option>
<option name="<%= _("Network") %>">
<%= image_element("/distribution/leap/#{leap_snapshot}/iso/openSUSE-Leap-#{leap_snapshot}-NET-x86_64-Build#{leap_snapshot_build}-Media.iso",
_("Leap %s Network Installation (Build %s)") % [leap_snapshot, leap_snapshot_build]) %>
</option>
</decision>
</option>
<%- end %>
</decision>

2 changes: 2 additions & 0 deletions config/routes.rb
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end
get 'find', to: 'search#find', :format => false

get 'images.xml', to: 'images#images'

controller :package do
get 'package/:package' => :show, :constraints => { :package => /[-+\w\.:\@]+/ }
get 'package/thumbnail/:package.png' => :thumbnail, :constraints => { :package => /[-+\w\.:\@]+/ }
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