/
parser.rb
129 lines (104 loc) · 2.54 KB
/
parser.rb
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# frozen_string_literal: true
require "llhttp"
module HTTP
class Response
# @api private
class Parser
attr_reader :parser, :headers, :status_code, :http_version
def initialize
@handler = Handler.new(self)
@parser = LLHttp::Parser.new(@handler, :type => :response)
reset
end
def reset
@parser.finish
@handler.reset
@header_finished = false
@message_finished = false
@headers = Headers.new
@chunk = nil
@status_code = nil
@http_version = nil
end
def add(data)
parser << data
self
rescue LLHttp::Error => e
raise IOError, e.message
end
alias << add
def mark_header_finished
@header_finished = true
@status_code = @parser.status_code
@http_version = "#{@parser.http_major}.#{@parser.http_minor}"
end
def headers?
@header_finished
end
def add_header(name, value)
@headers.add(name, value)
end
def mark_message_finished
@message_finished = true
end
def finished?
@message_finished
end
def add_body(chunk)
if @chunk
@chunk << chunk
else
@chunk = chunk
end
end
def read(size)
return if @chunk.nil?
if @chunk.bytesize <= size
chunk = @chunk
@chunk = nil
else
chunk = @chunk.byteslice(0, size)
@chunk[0, size] = ""
end
chunk
end
class Handler < LLHttp::Delegate
def initialize(target)
@target = target
super()
reset
end
def reset
@reading_header_value = false
@field_value = +""
@field = +""
end
def on_header_field(field)
append_header if @reading_header_value
@field << field
end
def on_header_value(value)
@reading_header_value = true
@field_value << value
end
def on_headers_complete
append_header if @reading_header_value
@target.mark_header_finished
end
def on_body(body)
@target.add_body(body)
end
def on_message_complete
@target.mark_message_finished
end
private
def append_header
@target.add_header(@field, @field_value)
@reading_header_value = false
@field_value = +""
@field = +""
end
end
end
end
end