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#
# Author:: Jesse Campbell (<hikeit@gmail.com>)
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'chef/provider/file'
require 'uri'
require 'tempfile'
class Chef
class Provider
class RemoteFile < Chef::Provider::File
include Chef::Mixin::EnforceOwnershipAndPermissions
def load_current_resource
@current_resource = Chef::Resource::RemoteFile.new(@new_resource.name)
super
fileinfo = load_fileinfo
if fileinfo && fileinfo["checksum"] == @current_resource.checksum
@current_resource.etag fileinfo["etag"]
@current_resource.last_modified fileinfo["last_modified"]
@current_resource.source fileinfo["src"]
end
end
def action_create
Chef::Log.debug("#{@new_resource} checking for changes")
if current_resource_matches_target_checksum?
Chef::Log.debug("#{@new_resource} checksum matches target checksum (#{@new_resource.checksum}) - not updating")
else
sources = @new_resource.source
raw_file, raw_file_source = try_multiple_sources(sources)
if raw_file.nil?
Chef::Log.info("#{@new_resource} matched #{raw_file_source}, not updating")
elsif matches_current_checksum?(raw_file)
Chef::Log.info("#{@new_resource} downloaded from #{raw_file_source}, checksums match, not updating")
raw_file.close!
else
Chef::Log.info("#{@new_resource} downloaded from #{raw_file_source}")
description = []
description << "copy file downloaded from #{raw_file_source} into #{@new_resource.path}"
description << diff_current(raw_file.path)
converge_by(description) do
backup_new_resource
FileUtils.cp raw_file.path, @new_resource.path
Chef::Log.info "#{@new_resource} updated"
raw_file.close!
save_fileinfo(raw_file_source)
end
# whyrun mode cleanup - the temp file will never be used,
# so close/unlink it here.
if whyrun_mode?
raw_file.close!
end
end
end
set_all_access_controls
update_new_file_state
end
def current_resource_matches_target_checksum?
@new_resource.checksum && @current_resource.checksum && @current_resource.checksum =~ /^#{Regexp.escape(@new_resource.checksum)}/
end
def matches_current_checksum?(candidate_file)
Chef::Log.debug "#{@new_resource} checking for file existence of #{@new_resource.path}"
@new_resource.checksum(checksum(candidate_file.path))
if ::File.exists?(@new_resource.path)
Chef::Log.debug "#{@new_resource} file exists at #{@new_resource.path}"
Chef::Log.debug "#{@new_resource} target checksum: #{@current_resource.checksum}"
Chef::Log.debug "#{@new_resource} source checksum: #{@new_resource.checksum}"
@new_resource.checksum == @current_resource.checksum
else
Chef::Log.debug "#{@new_resource} creating #{@new_resource.path}"
false
end
end
def backup_new_resource
if ::File.exists?(@new_resource.path)
Chef::Log.debug "#{@new_resource} checksum changed from #{@current_resource.checksum} to #{@new_resource.checksum}"
backup @new_resource.path
end
end
private
# Given an array of source uris, iterate through them until one does not fail
def try_multiple_sources(sources)
sources = sources.dup
source = sources.shift
begin
uri = URI.parse(source)
raw_file = grab_file_from_uri(uri)
rescue SocketError, Errno::ECONNREFUSED, Errno::ENOENT, Errno::EACCES, Timeout::Error, Net::HTTPFatalError, Net::FTPError => e
Chef::Log.warn("#{@new_resource} cannot be downloaded from #{source}: #{e.to_s}")
if source = sources.shift
Chef::Log.info("#{@new_resource} trying to download from another mirror")
retry
else
raise e
end
end
if uri.userinfo
uri.password = "********"
end
return raw_file, uri.to_s
end
# Given a source uri, return a Tempfile, or a File that acts like a Tempfile (close! method)
def grab_file_from_uri(uri)
if_modified_since = @new_resource.last_modified
if_none_match = @new_resource.etag
# The current resource's source uri was saved with a masked password
uri_dup = uri.dup
if uri_dup.userinfo
uri_dup.password = "********"
end
if uri_dup.to_s == @current_resource.source[0]
if_modified_since ||= @current_resource.last_modified
if_none_match ||= @current_resource.etag
end
if URI::HTTP === uri
#HTTP or HTTPS
raw_file, mtime, etag = RemoteFile::HTTP.fetch(uri, if_modified_since, if_none_match)
elsif URI::FTP === uri
#FTP
raw_file, mtime = RemoteFile::FTP.fetch(uri, @new_resource.ftp_active_mode, if_modified_since)
etag = nil
elsif uri.scheme == "file"
#local/network file
raw_file, mtime = RemoteFile::LocalFile.fetch(uri, if_modified_since)
etag = nil
else
raise ArgumentError, "Invalid uri. Only http(s), ftp, and file are currently supported"
end
unless raw_file.nil?
@new_resource.etag etag unless @new_resource.etag
@new_resource.last_modified mtime unless @new_resource.last_modified
end
return raw_file
end
def cache_path
cache_path = new_resource.name.sub(/^([A-Za-z]:)/, "") # strip drive letter on Windows
end
def load_fileinfo
begin
Chef::JSONCompat.from_json(Chef::FileCache.load("remote_file/#{cache_path}"))
rescue Chef::Exceptions::FileNotFound
nil
end
end
def save_fileinfo(source)
cache = Hash.new
cache["etag"] = @new_resource.etag
cache["last_modified"] = @new_resource.last_modified
cache["src"] = source
cache["checksum"] = @new_resource.checksum
Chef::FileCache.store("remote_file/#{cache_path}", cache.to_json)
end
end
end
end
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