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|
# frozen-string-literal: true
using Plum::BinaryString
module Plum
module Rack
INVALID_HEADERS = Set["connection", "keep-alive", "proxy-connection", "transfer-encoding", "upgrade"].freeze
class Session
attr_reader :app, :plum
def initialize(svc, sock, plum)
@svc = svc
@app = svc.app
@sock = sock
@plum = plum
@logger = svc.logger
@config = svc.config
@remote_addr = sock.peeraddr.last
@threadpool = svc.threadpool
setup_plum
rescue Errno::ENOTCONN
# TCP connection reset while doing TLS handshake
end
def stop
@plum.close
end
def to_io
@sock.to_io
end
def run
while !@sock.closed? && !@sock.eof?
@plum << @sock.readpartial(1024)
end
ensure
stop
end
private
def setup_plum
@plum.on(:connection_error) { |ex| @logger.error(ex) }
# @plum.on(:stream) { |stream| @logger.debug("new stream: #{stream}") }
@plum.on(:stream_error) { |stream, ex|
if [:cancel, :refused_stream].include?(ex.http2_error_type)
@logger.debug("stream was cancelled: #{stream}")
else
@logger.error(ex)
end
}
reqs = {}
@plum.on(:headers) { |stream, h|
reqs[stream] = { headers: h, data: "".b }
}
@plum.on(:data) { |stream, d|
reqs[stream][:data] << d # TODO: store to file?
check_window(stream)
}
@plum.on(:end_stream) { |stream|
req = reqs.delete(stream)
err = proc { |err|
stream.send_headers({ ":status" => 500 }, end_stream: true)
@logger.error(err)
}
if @threadpool
@threadpool.acquire(err) {
handle_request(stream, req[:headers], req[:data])
}
else
begin
handle_request(stream, req[:headers], req[:data])
rescue
err.call($!)
end
end
}
end
def check_window(stream)
ws = @plum.local_settings[:initial_window_size]
stream.window_update(ws) if stream.recv_remaining_window < (ws / 2)
@plum.window_update(ws) if @plum.recv_remaining_window < (ws / 2)
end
def send_body(stream, body)
begin
if body.respond_to?(:to_str)
stream.send_data(body, end_stream: true)
elsif body.respond_to?(:readpartial) && body.respond_to?(:eof?)
until body.eof?
stream.send_data(body.readpartial(65536), end_stream: body.eof?)
end
else
body.each { |part| stream.send_data(part, end_stream: false) }
stream.send_data(end_stream: true)
end
ensure
body.close if body.respond_to?(:close)
end
end
def extract_push(reqheaders, extheaders)
pushs = extheaders["plum.serverpush"]
return nil unless pushs
authority = reqheaders.find { |k, v| k == ":authority" }[1]
scheme = reqheaders.find { |k, v| k == ":scheme" }[1]
pushs.split(";").map { |push|
method, path = push.split(" ", 2)
{
":authority" => authority,
":method" => method.upcase,
":scheme" => scheme,
":path" => path
}
}
end
def handle_request(stream, headers, data)
env = new_env(headers, data)
r_status, r_rawheaders, r_body = @app.call(env)
r_headers, r_extheaders = extract_headers(r_status, r_rawheaders)
if @config[:server_push] && @plum.push_enabled?
push_preqs = extract_push(headers, r_extheaders)
end
no_body = r_body.respond_to?(:empty?) && r_body.empty?
stream.send_headers(r_headers, end_stream: no_body)
if push_preqs
push_preqs.map! { |preq|
[stream.promise(preq), preq]
}
end
send_body(stream, r_body) unless no_body
if push_preqs
push_preqs.each { |st, preq|
penv = new_env(preq, "".b)
p_status, p_h, p_body = @app.call(penv)
p_headers, _ = extract_headers(p_status, p_h)
pno_body = p_body.respond_to?(:empty?) && p_body.empty?
st.send_headers(p_headers, end_stream: pno_body)
send_body(st, p_body) unless pno_body
}
end
end
def new_env(h, data)
ebase = {
"rack.version" => ::Rack::VERSION,
"rack.input" => StringIO.new(data),
"rack.errors" => $stderr,
"rack.multithread" => true,
"rack.multiprocess" => false,
"rack.run_once" => false,
"rack.hijack?" => false,
"SCRIPT_NAME" => "",
"REMOTE_ADDR" => @remote_addr,
"HTTP_VERSION" => "HTTP/2.0", # Rack::CommonLogger uses
}
h.each { |k, v|
case k
when ":method"
ebase["REQUEST_METHOD"] = v
when ":path"
cpath_name, cpath_query = v.split("?", 2)
ebase["PATH_INFO"] = cpath_name
ebase["QUERY_STRING"] = cpath_query || ""
when ":authority"
chost, cport = v.split(":", 2)
ebase["SERVER_NAME"] = chost
ebase["SERVER_PORT"] = cport || "443"
when ":scheme"
ebase["rack.url_scheme"] = v
else
unless k.start_with?(":") # ignore unknown pseudo-headers
if k == "cookie" && ebase["HTTP_COOKIE"]
if ebase["HTTP_COOKIE"].frozen?
(ebase["HTTP_COOKIE"] += "; ") << v
else
ebase["HTTP_COOKIE"] << "; " << v
end
else
ebase["HTTP_" + k.tr("-", "_").upcase!] = v
end
end
end
}
ebase
end
def extract_headers(r_status, r_h)
rbase = {
":status" => r_status,
"server" => "plum/#{::Plum::VERSION}",
}
rext = {}
r_h.each do |key, v_|
if key.include?(".")
rext[key] = v_
else
key = key.downcase
if "set-cookie" == key
rbase[key] = v_.gsub("\n", "; ") # RFC 7540 8.1.2.5
elsif !INVALID_HEADERS.member?(key)
rbase[key] = v_.tr("\n", ",") # RFC 7230 7
end
end
end
[rbase, rext]
end
end
end
end
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