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using Plum::BinaryString
module Plum
module FrameUtils
# Splits the frame into multiple frames if the payload size exceeds max size.
#
# @param max [Integer] The maximum size of a frame payload.
# @return [Array<Frame>] The splitted frames.
def split_data(max)
return [self] if self.length <= max
raise "Frame type must be DATA" unless self.type == :data
fragments = []
while (pos = fragments.size * max) <= self.length # zero
fragments << self.payload.byteslice(pos, max)
end
frames = []
last = Frame.data(stream_id, fragments.pop, *(self.flags & [:end_stream]))
fragments.each do |fragment|
frames << Frame.data(stream_id, fragment, *(self.flags - [:end_stream]))
end
frames << last
frames
end
def split_headers(max)
return [self] if self.length <= max
raise "Frame type must be DATA" unless [:headers, :push_promise].include?(self.type)
fragments = []
while (pos = fragments.size * max) < self.length # zero
fragments << self.payload.byteslice(pos, max)
end
frames = []
frames << Frame.new(type_value: self.type_value, flags: self.flags - [:end_headers], stream_id: self.stream_id, payload: fragments.shift)
if fragments.size > 0
last = Frame.continuation(stream_id, fragments.pop, *(self.flags & [:end_headers]))
fragments.each do |fragment|
frames << Frame.continuation(stream_id, fragment)
end
frames << last
end
frames
end
# Parses SETTINGS frame payload. Ignores unknown settings type (see RFC7540 6.5.2).
#
# @return [Hash<Symbol, Integer>] The parsed strings.
def parse_settings
settings = {}
payload.each_byteslice(6) do |param|
id = param.uint16
name = Frame::SETTINGS_TYPE.key(id)
# ignore unknown settings type
settings[name] = param.uint32(2) if name
end
settings
end
end
end
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