Old and new websocketd implementations.

dev
Karchnu 3 years ago
parent c57a7e8748
commit 69a1a3a337

@ -18,6 +18,8 @@ dependencies:
targets:
websocketd:
main: src/websocketd.cr
websocketd-new:
main: src/websocketd-new.cr
websocketc:
main: src/websocketc.cr

@ -38,7 +38,14 @@ class HTTP::WebSocket
record Pong
record Close
record Error
record NotFinal
# record NotFinal
struct NotFinal
property message : String
property info : Protocol::PacketInfo
def initialize(@message, @info)
end
end
# :nodoc:
def run_once : Bytes | String | Close | Ping | Pong | NotFinal | Error
@ -47,8 +54,6 @@ class HTTP::WebSocket
rescue IO::EOFError
close
return Error.new
rescue
return Error.new
end
case info.opcode
@ -75,6 +80,8 @@ class HTTP::WebSocket
@on_message.try &.call(@current_message.to_s)
@current_message.clear
return String.new message
else
return NotFinal.new String.new(message), info
end
when Protocol::Opcode::BINARY
message = @buffer[0, info.size]
@ -95,7 +102,7 @@ class HTTP::WebSocket
end
end
return NotFinal.new
raise "what the fuck?"
end
# Returns the websocket instance.
@ -115,7 +122,7 @@ class WebSocket < HTTP::WebSocket
getter? closed = false
def finalize
# puts "WebSocket garbage collection!!"
# puts "WrappedTCPFileDescriptor garbage collection!!"
# super
end
end

@ -0,0 +1,343 @@
require "option_parser"
require "ipc"
require "socket"
require "./colors"
require "colorize"
require "json"
require "socket"
require "http/server"
require "base64"
require "digest"
require "./utils"
require "baguette-crystal-base"
require "./instance_storage.cr"
# All modifications to standard libraries go there.
require "./lib_modifications.cr"
class Context
# service instance parameters
# they can be changed via the cli
class_property service_name : String = "websocket"
class_property host : String = "0.0.0.0"
class_property port_to_listen : UInt16 = 1234
class_property timer_delay : Int32 = 30_000 # 30 seconds
end
OptionParser.parse do |parser|
parser.on "-l host", "--l host", "IP address to listen on." do |h|
Context.host = h
end
parser.on "-p port", "--port port", "Port to listen on." do |port|
Context.port_to_listen = port.to_u16
end
parser.on "-s service-name", "--service-name service-name", "Service name." do |name|
Context.service_name = name
end
parser.on "-t timer-delay", "--timer-delay timer-delay", "Timer delay (in seconds)" do |t|
Context.timer_delay = t.to_i32 * 1000 # stored in ms
end
parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
Baguette::Context.verbosity = opt.to_i
end
parser.on "-h", "--help", "Show this help" do
puts parser
exit 0
end
end
def sending_ping_messages
Context.context.fd_to_websocket.each do |fd, ws|
begin
ws.ping "hello from #{fd}"
rescue e
Baguette::Log.error "Exception: #{e}, already closed client #{fd}"
begin
Context.context.remove_fd fd
rescue e
Baguette::Log.error "Cannot remove #{fd} from clients: #{e}"
end
end
end
end
def ws_http_upgrade(client)
request = HTTP::Request.from_io client
if request.nil?
raise "#REQUEST IS NIL"
end
if request.is_a? HTTP::Status && request == HTTP::Status::BAD_REQUEST
raise "BAD REQUEST DAZE~"
end
if request.is_a? HTTP::Status
raise "Not bad request but still pretty bad: #{request.to_s}"
end
# FIXME: check they actually wanted to upgrade to websocket
key = request.headers["Sec-WebSocket-Key"]
response_key = Digest::SHA1.base64digest key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
# Baguette::Log.debug response_key
# HTTP inside bru
headers_header = "HTTP/1.1 101 Switching Protocols"
headers = HTTP::Headers {
"Upgrade" => "websocket",
"Connection" => "Upgrade",
"Sec-WebSocket-Accept" => response_key
}
headers = headers.map { |key, value| "#{key}: #{value[0]}\r\n" }.join
# requested service, fd
req_service = request.path.lchop.sub "ws/", ""
if req_service.ends_with? ".JSON"
Context.context.is_json[client.fd] = true
req_service = req_service.gsub /.JSON$/, ""
else
Context.context.is_json[client.fd] = false
end
# puts "#{headers_header}\n#{headers.to_s}\r\n"
client.send "#{headers_header}\n#{headers.to_s}\r\n"
wsclient = WebSocket.new client
wsclient.on_pong do |m|
Baguette::Log.debug "pong #{m}"
end
# registering the client into storing structures to avoid being garbage collected
Context.context.fd_to_socket[client.fd] = client
Context.context.fd_to_websocket[client.fd] = wsclient
return req_service, request
rescue e
Baguette::Log.error "Exception in ws_http_upgrade: #{e}"
raise "DROP IT"
end
def handle_new_clients(service, server)
# TODO: this is a lot of C-like notation, should be changed.
# In the client accept function
# 1. accept TCP/WS connection
client = server.accept
# 2. upgrade HTTP connections and get the service name in the URI path.
req_service, request = ws_http_upgrade client
# 3. connect to the service via ipc_connection_switched
serverfd : Int32 = 0
# LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, Pointer(Libc::Int).null
spointer = pointerof(serverfd)
if req_service == "tracker"
req_service = "tracking"
end
LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, spointer
if serverfd == 0
raise "Could not connect to #{req_service}"
end
# 4. change client callbacks via ipc_switching_callbacks
# only the client callbacks are changed, since the associated server is a simple libipc service
proc_cb_in = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
LibIPC.ipc_switching_callbacks service.pointer, client.fd, proc_cb_in, proc_cb_out
# 5. In case the requested service is trackingd,
# the websocketd has to provide the IP address as the first message.
if req_service == "tracking"
# The proxy is configured to provide the X-Real-IP in the headers.
# If not found, we use the client address from the socket.
real_ip_address = request.headers["X-Real-IP"] || client.remote_address.address
Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{serverfd}"
# sfd = Context.context.switchtable[client.fd]
# message = IPC::Message.from_json(JSON).to_packet
# => JSON has to include these attributes: mtype, utype, payload
# message = IPC::Message.new mtype, utype, payload
# remote_address = client.remote_address.address
message = IPC::Message.new serverfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
service.send message
# serv = WrappedTCPFileDescriptor.new(fd: serverfd, family: Socket::Family::INET)
# serv.send message.to_packet
end
Baguette::Log.debug "new client: #{client.fd}"
rescue e
Baguette::Log.error "Exception in handle_new_client: #{e}"
unless client.nil?
client.close
end
end
def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
# Baguette::Log.info "OUT fd is #{fd}"
wsclient = Context.context.fd_to_websocket[fd]
message = IPC::Message.new pm
# pp! message
if Context.context.is_json[fd]
buf = message.to_json
else
buf = message.to_packet
end
wsclient.send buf
return LibIPC::IPCCB::NoError
rescue e
Baguette::Log.error "Exception during message transfer: #{e}"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
end
def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
# Baguette::Log.debug "IN fd is #{fd}"
wsclient = Context.context.fd_to_websocket[fd]
message = nil
begin
message = wsclient.run_once
rescue e
Baguette::Log.error "run_once FAILED: #{e}"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
end
if wsclient.ws.io.empty?
more_to_read[0] = 0
else
more_to_read[0] = 1
end
if wsclient.closed?
Baguette::Log.info "client closed the connection"
Context.context.remove_fd fd
return LibIPC::IPCCB::Closing
end
if message.nil?
Baguette::Log.error "Reveiced a nil message"
Context.context.remove_fd fd
return LibIPC::IPCCB::Closing
end
case message
when String
if Context.context.is_json[fd]
ipc_message = IPC::Message.from_json(message)
ipc_message.copy_to_message_pointer pm
return LibIPC::IPCCB::NoError
end
else
# every other option should be dropped
case message
when WebSocket::Error
Baguette::Log.error "An error occured"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
when WebSocket::Ping
Baguette::Log.debug "Received a ping message"
Context.context.remove_fd fd
return LibIPC::IPCCB::Ignore
when WebSocket::Pong
Baguette::Log.debug "Received a pong message"
return LibIPC::IPCCB::Ignore
when WebSocket::Close
Baguette::Log.debug "Received a close message"
Context.context.remove_fd fd
return LibIPC::IPCCB::Closing
when WebSocket::NotFinal
Baguette::Log.warning "Received only part of a message: NOT IMPLEMENTED"
Context.context.remove_fd 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"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
else
Baguette::Log.error "Received a websocket message with unknown type"
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
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
end
class Context
class_property context = InstanceStorage.new
end
def main
# by default, listen on any IP address
server = TCPServer.new(Context.host, Context.port_to_listen)
service = IPC::Server.new Context.service_name
service << server.fd
# Every few seconds, the service should trigger the timer
# Allowing the sending of Ping messages to clients
service.base_timer = Context.timer_delay
service.timer = Context.timer_delay
service.loop do |event|
# Baguette::Log.info "current state of the context:"
# service.pp
case event
when IPC::Event::Timer
Baguette::Log.debug "IPC::Event::Timer"
sending_ping_messages
when IPC::Event::Connection
Baguette::Log.debug "IPC::Event::Connection: fd #{event.fd}"
when IPC::Event::Disconnection
Baguette::Log.debug "IPC::Event::Disconnection: fd #{event.fd}"
Context.context.remove_fd event.fd
when IPC::Event::ExtraSocket
Baguette::Log.debug "IPC::Event::ExtraSocket: fd #{event.fd}"
if server.fd != event.fd
raise "Error: the only extra socket should be the TCP/WS server"
end
handle_new_clients(service, server)
when IPC::Event::Switch
Baguette::Log.debug "IPC::Event::Switch: fd #{event.fd}"
# raise "Not implemented."
when IPC::Event::MessageSent
Baguette::Log.debug "IPC::Event::MessageSent: fd #{event.fd}"
when IPC::Event::MessageReceived
Baguette::Log.debug "IPC::Event::Message: fd #{event.fd}"
raise "Not implemented."
end
end
end
main

@ -3,8 +3,6 @@ require "ipc"
require "socket"
require "./colors"
require "colorize"
require "json"
require "socket"
@ -15,7 +13,7 @@ require "./utils"
require "baguette-crystal-base"
require "./instance_storage.cr"
require "colorize"
# All modifications to standard libraries go there.
require "./lib_modifications.cr"
@ -23,10 +21,13 @@ require "./lib_modifications.cr"
class Context
# service instance parameters
# they can be changed via the cli
class_property service_name : String = "websocket"
class_property host : String = "0.0.0.0"
class_property service_name = "websocket"
class_property host = "0.0.0.0"
class_property port_to_listen : UInt16 = 1234
class_property timer_delay : Int32 = 30_000 # 30 seconds
class_property timer_delay : Int32 = 30_000.to_i32
class_property print_messages = false
class_property print_timer = false
end
OptionParser.parse do |parser|
@ -43,36 +44,124 @@ OptionParser.parse do |parser|
end
parser.on "-t timer-delay", "--timer-delay timer-delay", "Timer delay (in seconds)" do |t|
Context.timer_delay = t.to_i32 * 1000 # stored in ms
Context.timer_delay = t.to_i32 * 1000
end
parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
Baguette::Context.verbosity = opt.to_i
end
parser.on "-T", "--print-timer", "Print timer." do
Context.print_timer = true
end
parser.on "-M", "--print-messages", "Print messages received and sent." do
Context.print_messages = true
end
parser.on "-h", "--help", "Show this help" do
puts parser
exit 0
end
end
def sending_ping_messages
Context.context.fd_to_websocket.each do |fd, ws|
# Link between fd and TCPSocket, WebSocket and IPC::Client instances.
class InstanceStorage
property service : IPC::SwitchingService
property switchtable : Hash(Int32, Int32)
property is_client : Hash(Int32,Bool)
property is_json : Hash(Int32, Bool)
property fd_to_tcpsocket : Hash(Int32, TCPSocket)
property fd_to_websocket : Hash(Int32, WebSocket)
property fd_to_ipcclient : Hash(Int32, IPC::Client)
def initialize (@service : IPC::SwitchingService)
# fdlist_client = [] of TCPSocket
@switchtable = Hash(Int32, Int32).new
@is_client = Hash(Int32,Bool).new
@is_json = Hash(Int32,Bool).new
@fd_to_tcpsocket = Hash(Int32, TCPSocket).new
@fd_to_websocket = Hash(Int32, WebSocket).new
@fd_to_ipcclient = Hash(Int32, IPC::Client).new
end
def remove_fd (fdclient : Int32)
Baguette::Log.info "closing the client:#{CRESET} #{fdclient}"
if fdclient == -1
raise "fdclient is -1, nothing to do with it"
end
begin
ws.ping "hello from #{fd}"
# 1. closing both the client and the service
tcpfdc = @fd_to_tcpsocket[fdclient]
# 2. closing the TCP connections
tcpfdc.close unless tcpfdc.closed?
rescue e
Baguette::Log.error "Exception: #{e}, already closed client #{fd}"
begin
Context.context.remove_fd fd
rescue e
Baguette::Log.error "Cannot remove #{fd} from clients: #{e}"
Baguette::Log.error "remove_fd: 1 #{e}"
end
# 3. removing the client and the service fds from the loop check
begin
@service.remove_fd (fdclient)
rescue e
Baguette::Log.error "remove_fd: 2 #{e}"
end
# 5. removing both the client and the service from the switchtable
fdservice = @switchtable[fdclient]?
@switchtable = @switchtable.select do |fdc, fds|
fdc != fdclient && fds != fdclient
end
# 6. removing the client and the service from is_client
@is_client = @is_client.select do |fd,v| fd != fdclient end
@is_json = @is_json.select do |fd,v| fd != fdclient end
@fd_to_websocket.select! do |fd, ws|
fd != fdclient
end
begin
if fdservice.nil?
Baguette::Log.debug "client #{fdclient} aleady has its service removed"
else
@service.remove_fd (fdservice)
service = @fd_to_ipcclient[fdservice]
@fd_to_ipcclient = @fd_to_ipcclient.select do |k, v|
k != fdservice
end
@is_client = @is_client.select do |fd,v| fd != fdservice end
# perform the close at the end
# on crash, this service still is removed from the list of listened fd
service.close
end
rescue e
Baguette::Log.error "remove_fd: 3 #{e}"
end
rescue e
Baguette::Log.error "in InstanceStorage#remove_fd: #{e}"
end
end
def ws_http_upgrade(client)
class Context
class_property service = IPC::SwitchingService.new service_name
class_property context = InstanceStorage.new service
end
# by default, listen on any IP address
server = TCPServer.new(Context.host, Context.port_to_listen)
Context.service << server.fd
def websocket_client_connection(client)
request = HTTP::Request.from_io client
if Context.print_messages
pp! request
end
if request.nil?
raise "#REQUEST IS NIL"
@ -86,10 +175,11 @@ def ws_http_upgrade(client)
raise "Not bad request but still pretty bad: #{request.to_s}"
end
# FIXME: check they actually wanted to upgrade to websocket
key = request.headers["Sec-WebSocket-Key"]
response_key = Digest::SHA1.base64digest key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
# Baguette::Log.debug response_key
# puts response_key
# HTTP inside bru
headers_header = "HTTP/1.1 101 Switching Protocols"
@ -103,6 +193,13 @@ def ws_http_upgrade(client)
# requested service, fd
req_service = request.path.lchop.sub "ws/", ""
if req_service.empty?
client.close
return
end
# The client may ask to transcript JSON-based messages into IPC messages.
# To that end, the client may send the name of the service it wants to reach with the prefix ".JSON".
if req_service.ends_with? ".JSON"
Context.context.is_json[client.fd] = true
@ -111,233 +208,316 @@ def ws_http_upgrade(client)
Context.context.is_json[client.fd] = false
end
# puts "#{headers_header}\n#{headers.to_s}\r\n"
client.send "#{headers_header}\n#{headers.to_s}\r\n"
wsclient = WebSocket.new client
wsclient.on_pong do |m|
Baguette::Log.debug "pong #{m}"
end
# registering the client into storing structures to avoid being garbage collected
Context.context.fd_to_socket[client.fd] = client
Context.context.fd_to_websocket[client.fd] = wsclient
return req_service, request
rescue e
Baguette::Log.error "Exception in ws_http_upgrade: #{e}"
raise "DROP IT"
end
def handle_new_clients(service, server)
# TODO: this is a lot of C-like notation, should be changed.
# In the client accept function
# 1. accept TCP/WS connection
client = server.accept
# 2. upgrade HTTP connections and get the service name in the URI path.
req_service, request = ws_http_upgrade client
# 3. connect to the service via ipc_connection_switched
serverfd : Int32 = 0
# LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, Pointer(Libc::Int).null
spointer = pointerof(serverfd)
# Hack to preserve the daemon naming convention.
if req_service == "tracker"
req_service = "tracking"
end
LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, spointer
if serverfd == 0
raise "Could not connect to #{req_service}"
end
# 4. change client callbacks via ipc_switching_callbacks
# only the client callbacks are changed, since the associated server is a simple libipc service
proc_cb_in = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
websocket_connection_procedure req_service, client.fd
LibIPC.ipc_switching_callbacks service.pointer, client.fd, proc_cb_in, proc_cb_out
# 5. In case the requested service is trackingd,
# the websocketd has to provide the IP address as the first message.
# If the requested service is trackingd, send the IP address of the client
if req_service == "tracking"
# The proxy is configured to provide the X-Real-IP in the headers.
# If not found, we use the client address from the socket.
real_ip_address = request.headers["X-Real-IP"] || client.remote_address.address
real_ip_address = request.headers["X-Real-IP"]? || client.remote_address.address
Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{serverfd}"
# sfd = Context.context.switchtable[client.fd]
sfd = Context.context.switchtable[client.fd]
Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{sfd}"
# message = IPC::Message.from_json(JSON).to_packet
# => JSON has to include these attributes: mtype, utype, payload
# message = IPC::Message.new mtype, utype, payload
# remote_address = client.remote_address.address
message = IPC::Message.new serverfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
service.send message
# serv = WrappedTCPFileDescriptor.new(fd: serverfd, family: Socket::Family::INET)
# serv.send message.to_packet
message = IPC::Message.new sfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
if Context.print_messages
Baguette::Log.info "to trackingd: #{message.to_s}"
end
serv = WrappedTCPFileDescriptor.new(fd: sfd, family: Socket::Family::INET)
serv.send message.to_packet
end
Baguette::Log.debug "new client: #{client.fd}"
rescue e
Baguette::Log.error "Exception in handle_new_client: #{e}"
unless client.nil?
client.close
if Context.print_messages
Baguette::Log.info "to client: #{headers_header}\n#{headers.to_s}"
end
end
def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
# Baguette::Log.info "OUT fd is #{fd}"
wsclient = Context.context.fd_to_websocket[fd]
message = IPC::Message.new pm
# pp! message
client.send "#{headers_header}\n#{headers.to_s}\r\n"
if Context.context.is_json[fd]
buf = message.to_json
else
buf = message.to_packet
wsclient = WebSocket.new client
wsclient.on_pong do |m|
Baguette::Log.debug "pong #{m}"
end
Context.context.is_client[client.fd] = true
wsclient.send buf
# listen to the client's file descriptor
Context.context.service << client.fd
# puts "#{CBLUE}new client: #{client.fd}#{CRESET}"
return LibIPC::IPCCB::NoError
rescue e
Baguette::Log.error "Exception during message transfer: #{e}"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
# registering the client into storing structures to avoid being garbage collected
Context.context.fd_to_tcpsocket[client.fd] = client
Context.context.fd_to_websocket[client.fd] = wsclient
end
def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
# Baguette::Log.debug "IN fd is #{fd}"
wsclient = Context.context.fd_to_websocket[fd]
def closing_client (fdclient : Int)
Baguette::Log.warning "Closing client #{fdclient}"
Context.context.remove_fd fdclient
end
message = nil
# first message from the client: requested service name
# 1. connection to the service
# 2. listening on the service fd
# 3. bounding both file descriptors (through switchtable hash)
# 4. indicating that the client is connected (in is_client)
def websocket_connection_procedure (requested_service : String, clientfd : Int32)
begin
message = wsclient.run_once
rescue e
Baguette::Log.error "run_once FAILED: #{e}"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
end
# 1. establishing a connection to the service
newservice = IPC::Client.new requested_service
new_service_fd = newservice.fd.not_nil!
Context.context.fd_to_ipcclient[new_service_fd] = newservice
if wsclient.ws.io.empty?
more_to_read[0] = 0
else
more_to_read[0] = 1
end
# 2. listening on the client fd and the service fd
Context.context.service << new_service_fd
if wsclient.closed?
Baguette::Log.info "client closed the connection"
Context.context.remove_fd fd
return LibIPC::IPCCB::Closing
end
# cannot perform automatic switching due to websockets headers
# future version of the libipc lib should include some workaround, probably
# service.switch.add fdclient, newservice.fd
if message.nil?
Baguette::Log.error "Reveiced a nil message"
Context.context.remove_fd fd
return LibIPC::IPCCB::Closing
# 3. bounding the client and the service fd
Context.context.switchtable[clientfd] = new_service_fd
Context.context.switchtable[new_service_fd] = clientfd
# 4. the client is then connected, send it a message
Context.context.is_client[clientfd] = true
Context.context.is_client[new_service_fd] = false
rescue e
Baguette::Log.error "Exception during connection to the service: #{e}"
Context.context.remove_fd clientfd
end
end
class FragmentBuffer
property buffer : String = String.new
end
case message
when String
if Context.context.is_json[fd]
ipc_message = IPC::Message.from_json(message)
ipc_message.copy_to_message_pointer pm
return LibIPC::IPCCB::NoError
def websocket_switching_procedure (activefd : Int)
begin
# Baguette::Log.title "activefd is #{activefd}"
if Context.context.is_client[activefd]
# Baguette::Log.title "activefd #{activefd} is a client"
# The client is a WebSocket on top of a TCP connection
client = Context.context.fd_to_tcpsocket[activefd]
wsclient = Context.context.fd_to_websocket[activefd]
fb = FragmentBuffer.new
loop do
begin
message = wsclient.run_once
rescue e
Baguette::Log.error "Exception (receiving a message) #{e}"
Context.context.remove_fd activefd
break
end
# Checking the internals of WebSocket, then the contained IO within, to know if there is still something to read in the socket.
still_something_to_read = ! wsclient.ws.io.empty?
if wsclient.closed?
Baguette::Log.info "client #{activefd} is closing"
Context.context.remove_fd activefd
break
end
if message.nil?
Baguette::Log.error "message received from #{activefd} is nil"
Context.context.remove_fd activefd
if still_something_to_read
Baguette::Log.info "Still something to read, but #{activefd} was removed"
next
end
break
end
case message
when WebSocket::Error
Baguette::Log.error "An error occured with client #{activefd}"
Context.context.remove_fd activefd
if still_something_to_read
Baguette::Log.debug "Still something to read, but #{activefd} was removed"
next
end
return
when WebSocket::Ping
Baguette::Log.debug "Received a ping message"
if still_something_to_read
Baguette::Log.debug "Still something to read"
next
end
break
when WebSocket::Pong
Baguette::Log.debug "Received a pong message"
if still_something_to_read
Baguette::Log.debug "Still something to read"
next
end
break
when WebSocket::Close
Baguette::Log.debug "Received a close message"
Context.context.remove_fd activefd
if still_something_to_read
Baguette::Log.debug "Still something to read"
next
end
break
when WebSocket::NotFinal
Baguette::Log.warning "Received only part of a message"
# TODO: check if the message is OK when multiplexing
# pp! message
fb.buffer = fb.buffer + message.message
if still_something_to_read
Baguette::Log.debug "Still something to read"
next
end
break
when Bytes
# TODO: when receiving a binary message
# we should test the format and maybe its content
Baguette::Log.warning "Received a binary message (not supported)"
if still_something_to_read
Baguette::Log.info "Still something to read"
next
end
end
# In case there was a previous messagee within a fragment.
if fb.buffer.size > 0
Baguette::Log.warning "SHOULD reconstitute the message!!"
end
if message.is_a?(String) && fb.buffer.size > 0
Baguette::Log.warning "Reconstitute the message!!"
message = fb.buffer + message
fb.buffer = String.new
end
if Context.context.is_json[activefd] && message.is_a?(String)
if Context.print_messages
j = JSON.parse message
Baguette::Log.info "received from client #{activefd}"
pp! j["payload"]
end
message = IPC::Message.from_json(message).to_packet
end
# client => service
fdservice = Context.context.switchtable[activefd]
# XXX: this is not a TCP fd, but since behind the scene this is compatible, I'm hacking a bit
# Also, I changed the "finalize" method of the TCPFileDescriptor class not to close the socket
# when the object is GC.
serv = WrappedTCPFileDescriptor.new(fd: fdservice, family: Socket::Family::INET)
#serv = Context.context.fd_to_ipcclient[fdservice]
serv.send message
break unless still_something_to_read
end # loop over the remaining messages to read on the websocket
else
# service => client
fdclient = Context.context.switchtable[activefd]
wsclient = Context.context.fd_to_websocket[fdclient]
serv = Context.context.fd_to_ipcclient[activefd]
message = serv.read
if Context.context.is_json[fdclient]
buf = message.to_json
if Context.print_messages
j = JSON.parse buf
Baguette::Log.info "received from service #{activefd}"
pp! j["payload"]
end
else
buf = message.to_packet
end
wsclient.send buf
end
else
# every other option should be dropped
case message
when WebSocket::Error
Baguette::Log.error "An error occured"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
when WebSocket::Ping
Baguette::Log.debug "Received a ping message"
Context.context.remove_fd fd
return LibIPC::IPCCB::Ignore
when WebSocket::Pong
Baguette::Log.debug "Received a pong message"
return LibIPC::IPCCB::Ignore
when WebSocket::Close
Baguette::Log.debug "Received a close message"
Context.context.remove_fd fd
return LibIPC::IPCCB::Closing
when WebSocket::NotFinal
Baguette::Log.warning "Received only part of a message: NOT IMPLEMENTED"
Context.context.remove_fd 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"
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
rescue e
Baguette::Log.error "Exception during message transfer: #{e}"
if Context.context.is_client[activefd]
closing_client activefd
else
Baguette::Log.error "Received a websocket message with unknown type"
clientfd = Context.context.switchtable[activefd]
closing_client clientfd
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
Context.context.remove_fd fd
return LibIPC::IPCCB::Error
end
class Context
class_property context = InstanceStorage.new
def sending_ping_messages
Context.context.fd_to_websocket.each do |fd, ws|
begin
ws.ping "hello from #{fd}"
rescue e
Baguette::Log.error "#{CRED}Exception: #{e}#{CRESET}, already closed client #{fd}"
begin
Context.context.remove_fd fd
rescue e
Baguette::Log.error "#{CRED}Cannot remove #{fd} from clients: #{e}#{CRESET}"
end
end
end
end
def main
# by default, listen on any IP address
server = TCPServer.new(Context.host, Context.port_to_listen)
service = IPC::Server.new Context.service_name
service << server.fd
# Every few seconds, the service should trigger the timer
# Allowing the sending of Ping messages to clients
service.base_timer = Context.timer_delay
service.timer = Context.timer_delay
# Every few seconds, the service should trigger the timer
# Allowing the sending of Ping messages to clients
Context.service.base_timer = Context.timer_delay
service.loop do |event|
# Baguette::Log.info "current state of the context:"
# service.pp
Context.service.loop do |event|
begin
case event
when IPC::Event::Timer
Baguette::Log.debug "IPC::Event::Timer"
Baguette::Log.info "IPC::Event::Timer" if Context.print_timer
sending_ping_messages
when IPC::Event::Connection
Baguette::Log.debug "IPC::Event::Connection: fd #{event.fd}"
Baguette::Log.debug "IPC::Event::Connection: #{event.fd}"
when IPC::Event::Disconnection
Baguette::Log.debug "IPC::Event::Disconnection: fd #{event.fd}"
Context.context.remove_fd event.fd
Baguette::Log.debug "IPC::Event::Disconnection: #{event.fd}"
when IPC::Event::ExtraSocket
Baguette::Log.debug "IPC::Event::ExtraSocket: fd #{event.fd}"
if server.fd != event.fd
raise "Error: the only extra socket should be the TCP/WS server"
Baguette::Log.debug "IPC::Event::ExtraSocket: #{event.fd}"
# 1. accept new websocket clients
if server.fd == event.fd
client = server.accept
begin
websocket_client_connection client
Baguette::Log.info "new client: #{client.fd}"
rescue e
Baguette::Log.error "Exception: #{e}"
client.close
end
next
end
# 2. active fd != server fd
activefd = event.fd
if activefd <= 0
Baguette::Log.error "faulty activefd: #{activefd}"
end
handle_new_clients(service, server)
websocket_switching_procedure activefd
when IPC::Event::Switch
Baguette::Log.debug "IPC::Event::Switch: fd #{event.fd}"
# raise "Not implemented."
Baguette::Log.debug "IPC::Event::Switch: from fd #{event.fd}"
raise "Not implemented."
# IPC::Event::Message has to be the last entry
# because ExtraSocket and Switch inherit from Message class
when IPC::Event::MessageSent
Baguette::Log.debug "IPC::Event::MessageSent: fd #{event.fd}"
Baguette::Log.error "IPC::Event::MessageSent: #{event.fd}"
when IPC::Event::MessageReceived
Baguette::Log.debug "IPC::Event::Message: fd #{event.fd}"
Baguette::Log.debug "IPC::Event::MessageReceived: #{event.fd}"
raise "Not implemented."
end
rescue e
Baguette::Log.error "IPC loop final catch: #{e}"
end
end
main

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