commit 5e7ef850604485314c69c3b7c1d184b42afd81dc Author: Jaidyn Lev Date: Sun Dec 2 02:09:38 2018 -0600 Init diff --git a/COPYING.txt b/COPYING.txt new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/COPYING.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.txt b/README.txt new file mode 100644 index 0000000..7e53f18 --- /dev/null +++ b/README.txt @@ -0,0 +1,138 @@ +=============================================================================== +FACILSERVIL : `Easy Server` Dead-simple, dead-useful. +=============================================================================== + +Sometimes, it's just annoying and time-draining to deal with all of the +intricacies of :usockets-- if, to that, you say something like... + + "I just want to write a simple TCP server, dammit! + There's got to be an easier way!" + +... then Facilservil is for you! + +Facilservil ("easy server") abstracts away the entire server bits, allowing you +to focus on flexibility. + + +---------------------------------------- +FEATURES +---------------------------------------- + + * Multi-user + * Shutdown protection + * Input-handling + * Simple logging system + * Flexibility + * UTF-8 + + +---------------------------------------- +DEMONSTRATION +---------------------------------------- + +Load up Facilservil, then run this in your repl: + + (facilservil:ex-server 8888) + +Now, connect your computer on port 8888! +If you're on LiGNUx or BSD, you can use "telnet localhost 8888" + +It'll show you a pretty example server. :) + +In reality, 'ex-server is just a small function for demonstration-- the +example server really looks like this: + + (facilservil:server "0.0.0.0" port + 'facilservil:connect-ex 'facilservil:disconnect-ex + 'facilservil:input-handle-ex) + +It runs #'connect-ex when you connect, #'disconnect-ex when you disconnect, +and #'input-handle-ex after you finish a command, to handle your input. + +If you wanna see this example's code (is there a better way to learn?), look +in "/src/ex.lisp". + +For a different kind of example (less interesting, since it takes no user +input), look at QOTDD (https://git.eunichx.us/qotdd). + +For a more comprehensive guide to Facilservil, look to USAGE, coming right up. + + +---------------------------------------- +USAGE +---------------------------------------- + +To use Facilservil, just use the `facilservil:server` function somewhere: + + (facilservil:server host port + connecting disconnecting input-handler + &key (command-byte 10) (halting 'halt-ex)) + +"host" and "port" are, obviously, the host-IP and port, respectively. +"connecting" is the function that will be executed when a user connects. +"disconnecting" is the function that will run when someone disconnects. +"input-handler" interprets the input of a user, when they complete a command. +"command-byte" is the byte which determines if they've completed a command. + it's 10 by default, which is newline. +"halting" is the function executed when the server shuts down. + + +Basically, you write the "connecting", "disconnecting", and "input-handler" +functions (maybe "halting"), and you've got a handy-dandy server. + +These functions you write must accept the following arguments: + connecting (socket client-id) + disconnecting (socket client-id) + input-handler (socket client-id input-string) + halting () + +Let's say that you want to write a connecting function which sends a friendly +"welcome" message. You'd do that like this, just about: + + (defun my-connecting-function (socket client-id) + (client-write socket + (format nil "Hey, welcome to this server, ~A! <3" client-id) + 'T)) + +This will write to the connecting user's socket (which is passed to your +function), "Hey, welcome to this server," followed by their client-id. + +Every user, upon connection, is given a client ID number which is correlated +with their connection socket. This ID number is random, and can be up to +999999 in value. + +To send a message to a user, get their socket, and run + (facilservil:client-write socket string &optional newline) + +"newline", which defaults to nil, determines whether or not your message is +followed with a newline. + +I'll give you one more quick example-- then you'll probably get usage. + +Let's write a quick input handler. + (defun my-input-handler (socket client-id input-string) + (if (equal input-string "Hello") + (facilservil:client-write socket "And hi to you!" 't) + (facilservil:client-write socket "You won't even say hi?" 'T))) + +It should be pretty self-explanatory. +You just scale up from them-- write a nice command parser or something, and +you're on your way! :) + +Now, one more thing: to run the server with your new functions, just do this: + + (facilservil:server host port + 'my-connecting-function 'facilservil:disconnect-ex + 'my-input-handler) + + +TIP: When it comes to user data, you might want to use a hash-table or two which + correlate client-ids and user data. ^_^ + + +---------------------------------------- +BORING STUFF +---------------------------------------- +License is in COPYING (GNU GPLv3) +Author is Jaidyn Ann +Sauce is at https://git.eunichx.us/facilservil diff --git a/facilservil.asd b/facilservil.asd new file mode 100755 index 0000000..2066d65 --- /dev/null +++ b/facilservil.asd @@ -0,0 +1,16 @@ +(defsystem "facilservil" + :version "0.1" + :author "Jaidyn Lev " + :license "CC0" + :depends-on ("usocket" "trivial-utf-8" "alexandria" "nih") + :components ((:module "src" + :components + ((:file "package") + (:file "meta") + (:file "io") + (:file "ex") + (:file "client") + (:file "server")))) + + :description + "Simple TCP/telnet server for Lisp.") diff --git a/src/.ex.lisp.swp b/src/.ex.lisp.swp new file mode 100644 index 0000000..df373f3 Binary files /dev/null and b/src/.ex.lisp.swp differ diff --git a/src/client.lisp b/src/client.lisp new file mode 100644 index 0000000..c7e86d6 --- /dev/null +++ b/src/client.lisp @@ -0,0 +1,76 @@ +(in-package :facilservil) + +;: SOCKET --> STRING +(defun make-socket-id (socket) + "Create a socket-id from a socket." + (format nil "~A" socket)) + +;; NIL --> NUMBER +(defun make-client-id () + "Generate a new client ID." + (random 999999)) + +;; STRING --> STRING +(defun make-client-input-id (client-id) + "Make an 'input ID' from a client-id." + (format nil "~A-input" client-id)) + +(defun make-client-output-id (client-id) + "Make an 'output ID' from a client-id." + (format nil "~A-output" client-id)) + + +;; ------------------------------------- + + +;; SOCKET --> NIL +(defun client-register (socket) + "Register a new client; add their data to globals, log it, etc." + + (let* ((client-id (make-client-id)) + (socket-id (make-socket-id socket)) + (output-id (make-client-output-id client-id)) + (input-id (make-client-input-id client-id))) + + (setq *socket-list* (concatenate 'list *socket-list* (list socket))) + (setq *client-socket-list* (concatenate 'list *client-socket-list* + (list socket))) + + (setq + *client-list* + (concatenate 'list *client-list* (list client-id))) + (setf + (gethash client-id *client-pairs*) socket-id) + (setf + (gethash socket-id *socket-pairs*) client-id) + (setf + (gethash output-id *client-data*) '()) + (setf + (gethash input-id *client-data*) '()) + + (journal (format nil "Client ~A has connected!" client-id) "Connect"))) + + +;; ------------------------------------- + + +(defun client-slaughter (socket) + "Clean up data from a client, and disconnect their socket." + + (let* ((socket-id (make-socket-id socket)) + (client-id (gethash socket-id *socket-pairs*)) + (output-id (make-client-output-id client-id)) + (input-id (make-client-input-id client-id))) + + (remhash socket-id *socket-pairs*) + (remhash client-id *client-pairs*) + (remhash client-id *client-data*) + (remhash input-id *client-data*) + (setq *client-list* (delete client-id *client-list*)) + (setq *socket-list* (delete socket *socket-list*)) + (setq *client-socket-list* (delete socket *client-socket-list*)) + + (usocket:socket-close socket) + (journal + (format nil "Client ~A has disconnected." client-id) + "Disconnect"))) diff --git a/src/ex.lisp b/src/ex.lisp new file mode 100644 index 0000000..d47d891 --- /dev/null +++ b/src/ex.lisp @@ -0,0 +1,60 @@ +(in-package :facilservil) + + +(defun connect-ex (socket client-id) + "Example connection handler-- sends a friendly welcome message!" + + (client-write socket + (format nil "Hey, welcome to this server, ~A! <3" client-id) + 'T)) + + +(defun disconnect-ex (socket client-id) + "Example disconnection handler-- tells the world, for some reason." + + (client-broadcast + (format nil "~%~A's just run away... NIL +(defun ex-server (port) + "Start a server-instance with the built-in example functions. + Demonstration purposes only!" + + (server "0.0.0.0" port 'connect-ex 'disconnect-ex 'input-handle-ex)) diff --git a/src/io.lisp b/src/io.lisp new file mode 100644 index 0000000..1e32af7 --- /dev/null +++ b/src/io.lisp @@ -0,0 +1,99 @@ +(in-package :facilservil) + + +;; SOCKET --> NIL +(defun client-read (socket) + "Read new input from a client socket to its `stack` list of bytes." + + (let* ((socket-id (make-socket-id socket)) + (client-id (gethash socket-id *socket-pairs*)) + (input-id (make-client-input-id client-id)) + (input-stack (gethash input-id *client-data*))) + + (setf (gethash input-id *client-data*) + (concatenate 'list input-stack + (list (read-byte (usocket:socket-stream socket))))))) + + + +;; SOCKET LIST/ARRAY --> NIL +(defun client-write-bytes (socket bytes) + "Write bytes to a client socket." + + (let ((sstream (usocket:socket-stream socket)) + (i 0)) + + (loop + :while (< i (length bytes)) + :do + (cond ((listp bytes) + (write-byte (nth i bytes) sstream)) + ((arrayp bytes) + (write-byte (aref bytes i) sstream))) + (setq i (+ i 1))) + + (force-output sstream))) + + + +;; SOCKET STRING [BOOLEAN] --> NIL +(defun client-write (socket string &optional (line-break nil)) + "Writes a string to a client socket-- w/o line-break, by default." + + (client-write-bytes + socket + (trivial-utf-8:string-to-utf-8-bytes + (if line-break + (format nil "~A~%" string) + string)))) + + +;; SOCKET --> NIl +(defun client-input-flush (socket) + "Clean all input from a socket." + + (let* ((socket-id (make-socket-id socket)) + (client-id (gethash socket-id *socket-pairs*)) + (input-id (make-client-input-id client-id))) + + (setf (gethash input-id *client-data*) '()))) + + +;; STRING BOOLEAN --> NIL +(defun client-broadcast (string &optional (line-break nil)) + "Writes a string to all client sockets-- w/o line-break, by default." + + (mapcar + (lambda (socket) (client-write socket string line-break)) + *client-socket-list*)) + + +;; SOCKET --> STRING +(defun client-input-string (socket) + "Get input from a client as a string." + + (let* ((socket-id (make-socket-id socket)) + (client-id (gethash socket-id *socket-pairs*)) + (input-id (make-client-input-id client-id)) + (input-bytes (gethash input-id *client-data*)) + (sanitized-bytes (remove-newline-bytes input-bytes))) + + (ignore-errors (trivial-utf-8:utf-8-bytes-to-string sanitized-bytes)))) + + + +;; ------------------------------------- + + + +(defun remove-newline-bytes (bytes) + (remove 13 (remove 10 bytes))) + +(defun commandp (socket) + (let* ((socket-id (make-socket-id socket)) + (client-id (gethash socket-id *socket-pairs*)) + (input-id (make-client-input-id client-id)) + (input-bytes (gethash input-id *client-data*)) + (last-byte (car (last input-bytes)))) + + (eq *command-byte* last-byte))) diff --git a/src/meta.lisp b/src/meta.lisp new file mode 100644 index 0000000..7506b71 --- /dev/null +++ b/src/meta.lisp @@ -0,0 +1,37 @@ +(in-package :facilservil) + + +;; DATA [STRING] --> STRING +(defun journal (data &optional (name "unnamed")) + "Print out a piece of data for logging on stdout." + + (format t "~A | ~A~%" (force-string-length name 10) data)) + + +(defun standard-journaling ()) + + + +;; LIST --> STRING +(defun print-bytes (bytes) + "Print a list of (UTF-8) bytes as a string to stdout." + + (if bytes + (format t "~A" + (ignore-errors (trivial-utf-8:utf-8-bytes-to-string bytes))))) + + +;; STRING NUMBER [STRING} --> STRING +(defun force-string-length (string desired-length &key (prefix "") (suffix " ")) + "Force a string to be of a certain length-- by whatever means necessary!" + + (cond + ((< (length string) desired-length) + (nih:min-string-length string desired-length :suffix suffix :prefix prefix)) + + ((< desired-length (length string)) + (nih:line-car (nih:max-string-length string desired-length))) + + ((eq (length string) desired-length) + string) + (nih:min-string-length string desired-length :suffix suffix))) diff --git a/src/package.lisp b/src/package.lisp new file mode 100644 index 0000000..9c8cc3d --- /dev/null +++ b/src/package.lisp @@ -0,0 +1,31 @@ +(defpackage :facilservil + (:use :cl) + (:export + + *socket-list* + *socket-pairs* + + *client-list* + *client-pairs* + *client-data* + *client-socket-list* + + :client-write + :cline-write-bytes + :client-broadcast + :client-slaughter + + :connect-ex + :disconnect-ex + :input-handle-ex + :halt-ex + :reboot-ex + + :ex-server + + :server-shutdown + :server-reboot + + :server)) + +(in-package :facilservil) diff --git a/src/server.lisp b/src/server.lisp new file mode 100644 index 0000000..f2c37bf --- /dev/null +++ b/src/server.lisp @@ -0,0 +1,135 @@ +(in-package :facilservil) + +;; ------------------------------------- +;; GLOAL VARIABLES + +(defvar *socket-list* '()) +(defvar *socket-pairs* '()) + +(defvar *client-list* '()) +(defvar *client-socket-list* '()) +(defvar *client-pairs* '()) +(defvar *client-data* '()) + +(defvar *command-byte* 10) + + +(defun reset-globals () + "Set all global variables to default state." + (setq *socket-pairs* (make-hash-table :test 'equal)) + (setq *client-list* '()) + (setq *client-socket-list* '()) + (setq *client-pairs* (make-hash-table :test 'equal)) + (setq *client-data* (make-hash-table :test 'equal)) + (setq *command-byte* 10)) + + +;; ------------------------------------- + + +;; STRING NUMBER CHARACTER FUNCTION-NAME FUNCTION-NAME FUNCTION-NAME --> NIL +(defun server + (host port connecting disconnecting input-handler + &key (command-byte 10) (halting 'halt-ex)) + + "Runs the basic server on `host`:`port`, running `connecting` when a new + client connects, `disconnecting` when one disconnects, and `input-handler` + when the byte `command-byte` is recieved as input. + + The three user-provided functions must take the following two arguments: + (socket client-id) + + The exception, `input-handler`, takes three arguments: + (socket client-id client-input-string) + + Inspired by + http://mihai.bazon.net/blog/howto-multi-threaded-tcp-server-in-common-lisp" + + (let* ((master-socket + (usocket:socket-listen host port + :reuse-address 'T + :element-type '(unsigned-byte 8)))) + (reset-globals) + (setq *command-byte* command-byte) + (setq *socket-list* (list master-socket)) + + (unwind-protect + (loop + (loop + :for socket + :in (usocket:wait-for-input *socket-list* :ready-only 'T) + :do + (cond + + ;; if new connection... + ((eq socket master-socket) + (let ((new-socket (usocket:socket-accept socket))) + + ;; add data to client-pairs, socket-pairs, client-data vv + (client-register new-socket) + + ;; execute user-provided #'connecting ^-^ + (let* ((socket-id (make-socket-id new-socket)) + (client-id (gethash socket-id *socket-pairs*))) + (funcall connecting new-socket client-id)))) + + + ;; ...if functioning old connection... + ((listen (usocket:socket-stream socket)) + (progn (client-read socket) + ;; check if command is complete-- if so, use user-provided + ;; input-handler. + (let* ((socket-id (make-socket-id socket)) + (client-id (gethash socket-id *socket-pairs*)) + (client-input (client-input-string socket))) + + ;; if reached *command-byte*, handle and flush input + (if (commandp socket) + (progn (funcall input-handler socket client-id client-input) + (client-input-flush socket)))))) + + + ;; ...if EOF connection or error...