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ws: compilable, still very WIP.

This commit is contained in:
Karchnu 2020-11-05 04:40:23 +01:00
parent 772389ab41
commit 59b701c03e

View File

@ -22,11 +22,6 @@ require "./lib_modifications.cr"
module Websocketc module Websocketc
class Exception < ::Exception class Exception < ::Exception
end end
class Context
class_property uri = "ws://localhost:1234/pong"
class_property rounds = 1
end
end end
class Baguette::Configuration class Baguette::Configuration
@ -40,64 +35,272 @@ class Baguette::Configuration
end end
end end
class Relation
property fd_client : Int32
property fd_service : Int32
property ws : WebSocket
# ws can send JSON messages instead of libipc-formated messages.
property is_json : Bool
def related? (fd : Int32)
fd == @fd_client || fd == @fd_service
end
def initialize(@fd_client, @fd_service, @ws, @is_json)
end
def to_s(io)
c = "%4d" % @fd_client
s = "%4d" % @fd_service
j = if @is_json
"JSON"
else
"Not JSON"
end
io << "client #{c} service #{s} #{j}"
end
end
# Hide the complexity of managing relations.
class Relations < Array(Relation)
property all_fd : Array(Int32) = Array(Int32).new
def <<(relation : Relation)
Baguette::Log.debug "Adding a new relation: #{relation}"
@all_fd << relation.fd_client
@all_fd << relation.fd_service
super relation
end
def search?(fd : Int32) : Relation?
find {|r| r.fd_client == fd || r.fd_service == fd }
end
def remove(fd : Int32)
each do |r|
if r.related? fd
Baguette::Log.debug "TODO: closing this relation: #{r}"
all_fd.select! {|v| v != r.fd_client && v != r.fd_service }
end
end
select! {|r| ! r.related? fd }
end
end
require "./network.cr" require "./network.cr"
class Websocketc::Service < IPC::Server class Websocketc::Service < IPC::Server
property connections : Hash(Int32, WebSocket) = {} of Int32 => WebSocket property relations : Relations = Relations.new
getter all_fd : Array(Int32) = Array(Int32).new
property config : Baguette::Configuration::Websocketc property config : Baguette::Configuration::Websocketc
def initialize(@config : Baguette::Configuration::Websocketc) def initialize(@config : Baguette::Configuration::Websocketc)
super "websocketc" super "ws"
end end
def handle_request(event : IPC::Event::MessageReceived) #def handle_request(event : IPC::Event::MessageReceived)
request_start = Time.utc # # send_now
#end
# TODO: The message can come from an already linked fd. # def handle_request(event : IPC::Event::MessageReceived)
# request_start = Time.utc
#
# # TODO: The message can come from an already linked fd.
#
# request = Websocketc.requests.parse_ipc_json event.message
#
# if request.nil?
# raise "unknown request type"
# end
#
# request_name = request.class.name.sub /^Websocketc::Request::/, ""
# Baguette::Log.debug "#{request_name}"
#
# response = begin
# request.handle self, event
# rescue e : Websocketc::Exception
# Baguette::Log.error "Websocketc::Exception: #{request_name} => #{e}"
# Websocketc::Response::Error.new "generic error"
# rescue e
# Baguette::Log.error "#{request_name} generic error #{e}"
# Websocketc::Response::Error.new "unknown error"
# end
#
# # If clients sent requests with an “id” field, it is copied
# # in the responses. Allows identifying responses easily.
# response.id = request.id
#
# send event.fd, response
#
# duration = Time.utc - request_start
#
# response_name = response.class.name.sub /^Websocketc::Response::/, ""
#
# if response.is_a? Websocketc::Response::Error
# Baguette::Log.warning "#{response_name} (#{response.reason})"
# else
# Baguette::Log.debug "#{response_name} (Total duration: #{duration})"
# end
# end
request = Websocketc.requests.parse_ipc_json event.message def first_connection(event : IPC::Event::MessageReceived)
# First message format: "URI"
payload = String.new event.message.payload
Baguette::Log.info "First message received: #{payload}"
if request.nil? # TODO: handle exceptions and errors
raise "unknown request type"
end
request_name = request.class.name.sub /^Websocketc::Request::/, "" begin
Baguette::Log.debug "<< #{request_name}" uri = URI.parse payload
ws = WebSocket.new uri
is_json = uri.path.ends_with? ".JSON"
pp! ws.ws
# service_fd = ws.ws.io
service_fd = 0
relation = Relation.new event.fd, service_fd, ws, is_json
pp! relation
@relations << relation
# Change client fd status.
LibIPC.ipc_ctx_fd_type self.pointer, event.fd, LibIPC::ConnectionType::Switched
# Add service fd as switched.
LibIPC.ipc_add_fd_switched self.pointer, service_fd
# Change service fd callbacks: only the service callbacks are changed,
# since the associated client is a simple libipc client
proc_cb_in = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
# self.remove_fd event.fd
LibIPC.ipc_switching_callbacks self.pointer, service_fd, proc_cb_in, proc_cb_out
Baguette::Log.debug "new client: #{event.fd}"
response = begin
request.handle self, event
rescue e : Websocketc::Exception
Baguette::Log.error "Websocketc::Exception: #{request_name} => #{e}"
Websocketc::Response::Error.new "generic error"
rescue e rescue e
Baguette::Log.error "#{request_name} generic error #{e}" Baguette::Log.error "cannot connect to #{payload}: #{e}"
Websocketc::Response::Error.new "unknown error"
end end
# If clients sent requests with an “id” field, it is copied Baguette::Log.info "Let's say it's OK"
# in the responses. Allows identifying responses easily. send_now event.fd, 1.to_u8, "OK"
response.id = request.id end
send event.fd, response def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
Baguette::Log.info "OUT fd is #{fd}"
@relations.search?(fd).try do |relation|
message = IPC::Message.new pm
Baguette::Log.info "message to send: #{message}"
duration = Time.utc - request_start if relation.is_json
buf = message.to_json
response_name = response.class.name.sub /^Websocketc::Response::/, ""
if response.is_a? Websocketc::Response::Error
Baguette::Log.warning ">> #{response_name} (#{response.reason})"
else else
Baguette::Log.debug ">> #{response_name} (Total duration: #{duration})" buf = message.to_packet
end
relation.ws.send buf
return LibIPC::IPCCB::NoError
end
Baguette::Log.error "Wait, not supposed to get here. No relation?"
return LibIPC::IPCCB::Error
rescue e
Baguette::Log.error "Exception during message transfer: #{e}"
@relations.remove fd
return LibIPC::IPCCB::Error
end
def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
Baguette::Log.info "IN fd is #{fd}"
@relations.search?(fd).try do |relation|
message = nil
begin
message = relation.ws.run_once
rescue e
Baguette::Log.error "run_once FAILED: #{e}"
@relations.remove fd
return LibIPC::IPCCB::Error
end
if relation.ws.ws.io.empty?
more_to_read[0] = 0
else
more_to_read[0] = 1
end
if relation.ws.closed?
Baguette::Log.info "client closed the connection"
@relations.remove fd
return LibIPC::IPCCB::Closing
end
if message.nil?
Baguette::Log.error "Reveiced a nil message"
@relations.remove fd
return LibIPC::IPCCB::Closing
end
case message
when String
if relation.is_json
ipc_message = IPC::Message.from_json(message)
ipc_message.copy_to_message_pointer pm
return LibIPC::IPCCB::NoError
end
when WebSocket::Ping
Baguette::Log.debug "TODO: Received a ping message"
return LibIPC::IPCCB::Ignore
else
# every other option should be dropped
case message
when WebSocket::Error
Baguette::Log.error "An error occured"
@relations.remove fd
return LibIPC::IPCCB::Error
when WebSocket::Pong
Baguette::Log.error "Received a pong message"
return LibIPC::IPCCB::Ignore
when WebSocket::Close
Baguette::Log.debug "Received a close message"
@relations.remove fd
return LibIPC::IPCCB::Closing
when WebSocket::NotFinal
Baguette::Log.warning "TODO: Received only part of a message."
@relations.remove fd
return LibIPC::IPCCB::Error
when Bytes
# TODO: when receiving a binary message
# we should test the format and maybe its content
Baguette::Log.error "Received a binary message: NOT IMPLEMENTED, YET"
@relations.remove fd
return LibIPC::IPCCB::Error
else
Baguette::Log.error "Received a websocket message with unknown type"
end end
end end
end
return LibIPC::IPCCB::Error
rescue e
Baguette::Log.error "Exception (receiving a message) #{e}"
# tcp = WrappedTCPFileDescriptor.new(fd: fd, family: Socket::Family::INET)
# tcp.close
@relations.remove fd
return LibIPC::IPCCB::Error
end
def run def run
Baguette::Log.title "Starting websocketc" Baguette::Log.title "Starting websocketc"
@timer = @config.ipc_timer
@base_timer = @config.ipc_timer
self.loop do |event| self.loop do |event|
begin begin
case event case event
@ -106,19 +309,22 @@ class Websocketc::Service < IPC::Server
when IPC::Event::Connection when IPC::Event::Connection
Baguette::Log.debug "connection from #{event.fd}" Baguette::Log.debug "connection from #{event.fd}"
@all_fd << event.fd
when IPC::Event::Disconnection when IPC::Event::Disconnection
Baguette::Log.debug "disconnection from #{event.fd}" Baguette::Log.debug "disconnection from #{event.fd}"
@all_fd.select! &.!=(event.fd) @relations.remove event.fd
connections.delete event.fd
when IPC::Event::MessageSent when IPC::Event::MessageSent
Baguette::Log.debug "message sent to #{event.fd}" Baguette::Log.debug "message sent to #{event.fd}"
when IPC::Event::MessageReceived when IPC::Event::MessageReceived
Baguette::Log.debug "message received from #{event.fd}" Baguette::Log.debug "message received from #{event.fd}"
handle_request event if r = @relations.search? event.fd
Baguette::Log.error "MessageReceived but from an already existent relation"
Baguette::Log.error "relation: #{r}"
else
first_connection event
end
when IPC::Exception when IPC::Exception
Baguette::Log.warning "IPC::Exception: #{event.message}" Baguette::Log.warning "IPC::Exception: #{event.message}"
@ -149,14 +355,6 @@ class Websocketc::Service < IPC::Server
OptionParser.parse do |parser| OptionParser.parse do |parser|
parser.on "-u uri", "--uri uri", "URI" do |opturi|
Websocketc::Context.uri = opturi
end
parser.on "-r rounds", "--rounds nb-messages", "Nb messages to send." do |opt|
Websocketc::Context.rounds = opt.to_i
end
parser.on "-h", "--help", "Show this help" do parser.on "-h", "--help", "Show this help" do
puts parser puts parser
exit 0 exit 0