Class: Configuration::RequestState

Inherits:
Hash
  • Object
show all
Includes:
ClassLogging
Defined in:
lib/httpimagestore/configuration/request_state.rb

Defined Under Namespace

Classes: Images

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(body, matches, path, query_string, request_uri, request_headers, memory_limit, forward_headers) ⇒ RequestState

Returns a new instance of RequestState.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 27

def initialize(body, matches, path, query_string, request_uri, request_headers, memory_limit, forward_headers)
	super() do |request_state, name|
		# note that request_state may be different object when useing with_locals that creates duplicate
		request_state[name] = request_state.generate_meta_variable(name) or raise VariableNotDefinedError.new(name)
	end

	# it is OK to overwrite path with a match
	self[:path] = path

	merge! matches

	log.debug "processing request with body length: #{body.bytesize} bytes and variables: #{map{|k,v| "#{k}: '#{v}'"}.join(', ')}"

	@body = body
	@images = Images.new(memory_limit)
	@query_string = query_string
	@request_uri = request_uri
	@request_headers = request_headers
	@memory_limit = memory_limit
	@output_callback = nil

	@forward_headers = forward_headers
end

Instance Attribute Details

#body ⇒ Object (readonly)

Returns the value of attribute body.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 51

def body
  @body
end

#forward_headers ⇒ Object (readonly)

Returns the value of attribute forward_headers.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 57

def forward_headers
  @forward_headers
end

#images ⇒ Object (readonly)

Returns the value of attribute images.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 52

def images
  @images
end

#memory_limit ⇒ Object (readonly)

Returns the value of attribute memory_limit.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 53

def memory_limit
  @memory_limit
end

#query_string ⇒ Object (readonly)

Returns the value of attribute query_string.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 54

def query_string
  @query_string
end

#request_headers ⇒ Object (readonly)

Returns the value of attribute request_headers.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 56

def request_headers
  @request_headers
end

#request_uri ⇒ Object (readonly)

Returns the value of attribute request_uri.



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# File 'lib/httpimagestore/configuration/request_state.rb', line 55

def request_uri
  @request_uri
end

Instance Method Details

#fetch_base_variable(name, base_name) ⇒ Object 



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# File 'lib/httpimagestore/configuration/request_state.rb', line 73

def fetch_base_variable(name, base_name)
	fetch(base_name, nil) or generate_meta_variable(base_name) or raise NoVariableToGenerateMetaVariableError.new(base_name, name)
end

#generate_meta_variable(name) ⇒ Object 



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# File 'lib/httpimagestore/configuration/request_state.rb', line 77

def generate_meta_variable(name)
	val = case name
	when :basename
		path = Pathname.new(fetch_base_variable(name, :path))
		path.basename(path.extname).to_s
	when :dirname
		Pathname.new(fetch_base_variable(name, :path)).dirname.to_s
	when :extension
		Pathname.new(fetch_base_variable(name, :path)).extname.delete('.')
	when :digest # deprecated
		@body.empty? and raise NoRequestBodyToGenerateMetaVariableError.new(name)
		Digest::SHA2.new.update(@body).to_s[0,16]
	when :input_digest
		@body.empty? and raise NoRequestBodyToGenerateMetaVariableError.new(name)
		Digest::SHA2.new.update(@body).to_s[0,16]
	when :input_sha256
		@body.empty? and raise NoRequestBodyToGenerateMetaVariableError.new(name)
		Digest::SHA2.new.update(@body).to_s
	when :input_image_width
		@images['input'].width or raise NoImageDataForVariableError.new('input', name)
	when :input_image_height
		@images['input'].height or raise NoImageDataForVariableError.new('input', name)
	when :input_image_mime_extension
		@images['input'].mime_extension or raise NoImageDataForVariableError.new('input', name)
	when :image_digest
		Digest::SHA2.new.update(@images[fetch_base_variable(name, :image_name)].data).to_s[0,16]
	when :image_sha256
		Digest::SHA2.new.update(@images[fetch_base_variable(name, :image_name)].data).to_s
	when :mimeextension # deprecated
		image_name = fetch_base_variable(name, :image_name)
		@images[image_name].mime_extension or raise NoImageDataForVariableError.new(image_name, name)
	when :image_mime_extension
		image_name = fetch_base_variable(name, :image_name)
		@images[image_name].mime_extension or raise NoImageDataForVariableError.new(image_name, name)
	when :image_width
		image_name = fetch_base_variable(name, :image_name)
		@images[image_name].width or raise NoImageDataForVariableError.new(image_name, name)
	when :image_height
		image_name = fetch_base_variable(name, :image_name)
		@images[image_name].height or raise NoImageDataForVariableError.new(image_name, name)
	when :uuid
		SecureRandom.uuid
	when :query_string_options
		query_string.sort.map{|kv| kv.join(':')}.join(',')
	end
	if val
		log.debug  "generated meta variable '#{name}': #{val}"
	else
		log.debug  "could not generated meta variable '#{name}'"
	end
	val
end

#output(&callback) ⇒ Object 



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# File 'lib/httpimagestore/configuration/request_state.rb', line 65

def output(&callback)
	@output_callback = callback
end

#output_callback ⇒ Object 



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# File 'lib/httpimagestore/configuration/request_state.rb', line 69

def output_callback
	@output_callback or fail 'no output callback'
end

#with_locals(*locals) ⇒ Object 



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# File 'lib/httpimagestore/configuration/request_state.rb', line 59

def with_locals(*locals)
	locals = locals.reduce{|a, b| a.merge(b)}
	log.debug "using additional local variables: #{locals}"
	self.dup.merge!(locals)
end