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require 'cgi'
require 'uri'
require 'puppet/indirector'
# This class encapsulates all of the information you need to make an
# Indirection call, and as a a result also handles REST calls. It's somewhat
# analogous to an HTTP Request object, except tuned for our Indirector.
class Puppet::Indirector::Request
attr_accessor :key, :method, :options, :instance, :node, :ip, :authenticated, :ignore_cache, :ignore_terminus
attr_accessor :server, :port, :uri, :protocol
attr_reader :indirection_name
OPTION_ATTRIBUTES = [:ip, :node, :authenticated, :ignore_terminus, :ignore_cache, :instance, :environment]
# Is this an authenticated request?
def authenticated?
# Double negative, so we just get true or false
! ! authenticated
end
def environment
unless defined?(@environment) and @environment
@environment = Puppet::Node::Environment.new()
end
@environment
end
def environment=(env)
@environment = if env.is_a?(Puppet::Node::Environment)
env
else
Puppet::Node::Environment.new(env)
end
end
def escaped_key
URI.escape(key)
end
# LAK:NOTE This is a messy interface to the cache, and it's only
# used by the Configurer class. I decided it was better to implement
# it now and refactor later, when we have a better design, than
# to spend another month coming up with a design now that might
# not be any better.
def ignore_cache?
ignore_cache
end
def ignore_terminus?
ignore_terminus
end
def initialize(indirection_name, method, key, options = {})
options ||= {}
raise ArgumentError, "Request options must be a hash, not %s" % options.class unless options.is_a?(Hash)
self.indirection_name = indirection_name
self.method = method
set_attributes(options)
@options = options.inject({}) { |hash, ary| hash[ary[0].to_sym] = ary[1]; hash }
if key.is_a?(String) or key.is_a?(Symbol)
# If the request key is a URI, then we need to treat it specially,
# because it rewrites the key. We could otherwise strip server/port/etc
# info out in the REST class, but it seemed bad design for the REST
# class to rewrite the key.
if key.to_s =~ /^\w+:\/\// # it's a URI
set_uri_key(key)
else
@key = key
end
else
@instance = key
@key = @instance.name
end
end
# Look up the indirection based on the name provided.
def indirection
Puppet::Indirector::Indirection.instance(indirection_name)
end
def indirection_name=(name)
@indirection_name = name.to_sym
end
def model
raise ArgumentError, "Could not find indirection '%s'" % indirection_name unless i = indirection
i.model
end
# Should we allow use of the cached object?
def use_cache?
if defined?(@use_cache)
! ! use_cache
else
true
end
end
# Are we trying to interact with multiple resources, or just one?
def plural?
method == :search
end
# Create the query string, if options are present.
def query_string
return "" unless options and ! options.empty?
"?" + options.collect do |key, value|
case value
when nil; next
when true, false; value = value.to_s
when Fixnum, Bignum, Float; value = value # nothing
when String; value = CGI.escape(value)
when Symbol; value = CGI.escape(value.to_s)
when Array; value = CGI.escape(YAML.dump(value))
else
raise ArgumentError, "HTTP REST queries cannot handle values of type '%s'" % value.class
end
"%s=%s" % [key, value]
end.join("&")
end
def to_hash
result = options.dup
OPTION_ATTRIBUTES.each do |attribute|
if value = send(attribute)
result[attribute] = value
end
end
result
end
def to_s
return uri if uri
return "/%s/%s" % [indirection_name, key]
end
private
def set_attributes(options)
OPTION_ATTRIBUTES.each do |attribute|
if options.include?(attribute)
send(attribute.to_s + "=", options[attribute])
options.delete(attribute)
end
end
end
# Parse the key as a URI, setting attributes appropriately.
def set_uri_key(key)
@uri = key
begin
uri = URI.parse(URI.escape(key))
rescue => detail
raise ArgumentError, "Could not understand URL %s: %s" % [key, detail.to_s]
end
# Just short-circuit these to full paths
if uri.scheme == "file"
@key = URI.unescape(uri.path)
return
end
@server = uri.host if uri.host
# If the URI class can look up the scheme, it will provide a port,
# otherwise it will default to '0'.
if uri.port.to_i == 0 and uri.scheme == "puppet"
@port = Puppet.settings[:masterport].to_i
else
@port = uri.port.to_i
end
@protocol = uri.scheme
@key = URI.unescape(uri.path.sub(/^\//, ''))
end
end
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