├── .gitignore ├── COPYRIGHT ├── Makefile ├── README ├── erlang.mk ├── priv ├── index.html └── static │ ├── jquery-1.7.min.js │ └── jquery.min.js ├── relx.config └── src ├── chat_demo.app.src ├── chat_demo.erl ├── chat_demo_app.erl ├── chat_demo_sup.erl ├── chat_server.erl ├── chat_server.lfe ├── chat_ws_handler.erl └── chat_ws_handler.lfe /.gitignore: -------------------------------------------------------------------------------- 1 | *~ 2 | *.beam 3 | -------------------------------------------------------------------------------- /COPYRIGHT: -------------------------------------------------------------------------------- 1 | Copyright (c) 2008-2014 Robert Virding. All rights reserved. 2 | 3 | Redistribution and use in source and binary forms, with or without 4 | modification, are permitted provided that the following conditions 5 | are met: 6 | 7 | 1. Redistributions of source code must retain the above copyright 8 | notice, this list of conditions and the following disclaimer. 9 | 2. Redistributions in binary form must reproduce the above copyright 10 | notice, this list of conditions and the following disclaimer in the 11 | documentation and/or other materials provided with the distribution. 12 | 13 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | POSSIBILITY OF SUCH DAMAGE. 25 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | ERLC_OPTS = 2 | 3 | PROJECT = chat_demo 4 | DEPS = cowboy 5 | dep_cowboy = git https://github.com/ninenines/cowboy master 6 | 7 | include erlang.mk 8 | -------------------------------------------------------------------------------- /README: -------------------------------------------------------------------------------- 1 | A very simple chat demo that uses websockets. I have used it in a QCon presentation. It uses cowboy and JQuery. 2 | 3 | After doing 'make' two ways of starting chat_demo are: 4 | 5 | 1) Start a chat_demo erlang release with an Erlang shell: 6 | 7 | $ ./_rel/chat_demo/bin/chat_demo console 8 | 9 | 2) If you have already built cowboy, ranch and cowlib and they are in you erlang path you can do: 10 | 11 | 1> chat_demo:start(). 12 | ok 13 | 2> 14 | 15 | You can then access the chat system from the browser by going to port 8080 on the current machine. 16 | 17 | The LFE versions of chat_server and chat_ws_handler are also included. 18 | 19 | NOTE: the browser front-end is severely lacking and needs much work. 20 | -------------------------------------------------------------------------------- /erlang.mk: -------------------------------------------------------------------------------- 1 | # Copyright (c) 2013-2014, Loïc Hoguin 2 | # 3 | # Permission to use, copy, modify, and/or distribute this software for any 4 | # purpose with or without fee is hereby granted, provided that the above 5 | # copyright notice and this permission notice appear in all copies. 6 | # 7 | # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 | # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 | # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 10 | # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 | # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 12 | # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 13 | # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 14 | 15 | .PHONY: all deps app rel docs tests clean distclean help 16 | 17 | ERLANG_MK_VERSION = 1 18 | 19 | # Core configuration. 20 | 21 | PROJECT ?= $(notdir $(CURDIR)) 22 | PROJECT := $(strip $(PROJECT)) 23 | 24 | # Verbosity. 25 | 26 | V ?= 0 27 | 28 | gen_verbose_0 = @echo " GEN " $@; 29 | gen_verbose = $(gen_verbose_$(V)) 30 | 31 | # Core targets. 32 | 33 | all:: deps app rel 34 | 35 | clean:: 36 | $(gen_verbose) rm -f erl_crash.dump 37 | 38 | distclean:: clean 39 | 40 | help:: 41 | @printf "%s\n" \ 42 | "erlang.mk (version $(ERLANG_MK_VERSION)) is distributed under the terms of the ISC License." \ 43 | "Copyright (c) 2013-2014 Loïc Hoguin " \ 44 | "" \ 45 | "Usage: [V=1] make [target]" \ 46 | "" \ 47 | "Core targets:" \ 48 | " all Run deps, app and rel targets in that order" \ 49 | " deps Fetch dependencies (if needed) and compile them" \ 50 | " app Compile the project" \ 51 | " rel Build a release for this project, if applicable" \ 52 | " docs Build the documentation for this project" \ 53 | " tests Run the tests for this project" \ 54 | " clean Delete temporary and output files from most targets" \ 55 | " distclean Delete all temporary and output files" \ 56 | " help Display this help and exit" \ 57 | "" \ 58 | "The target clean only removes files that are commonly removed." \ 59 | "Dependencies and releases are left untouched." \ 60 | "" \ 61 | "Setting V=1 when calling make enables verbose mode." 62 | 63 | # Core functions. 64 | 65 | ifeq ($(shell which wget 2>/dev/null | wc -l), 1) 66 | define core_http_get 67 | wget --no-check-certificate -O $(1) $(2)|| rm $(1) 68 | endef 69 | else 70 | define core_http_get 71 | erl -noshell -eval 'ssl:start(), inets:start(), case httpc:request(get, {"$(2)", []}, [{autoredirect, true}], []) of {ok, {{_, 200, _}, _, Body}} -> case file:write_file("$(1)", Body) of ok -> ok; {error, R1} -> halt(R1) end; {error, R2} -> halt(R2) end, halt(0).' 72 | endef 73 | endif 74 | 75 | # Copyright (c) 2013-2014, Loïc Hoguin 76 | # This file is part of erlang.mk and subject to the terms of the ISC License. 77 | 78 | .PHONY: distclean-deps distclean-pkg pkg-list pkg-search 79 | 80 | # Configuration. 81 | 82 | DEPS_DIR ?= $(CURDIR)/deps 83 | export DEPS_DIR 84 | 85 | REBAR_DEPS_DIR = $(DEPS_DIR) 86 | export REBAR_DEPS_DIR 87 | 88 | ALL_DEPS_DIRS = $(addprefix $(DEPS_DIR)/,$(DEPS)) 89 | 90 | ifeq ($(filter $(DEPS_DIR),$(subst :, ,$(ERL_LIBS))),) 91 | ifeq ($(ERL_LIBS),) 92 | ERL_LIBS = $(DEPS_DIR) 93 | else 94 | ERL_LIBS := $(ERL_LIBS):$(DEPS_DIR) 95 | endif 96 | endif 97 | export ERL_LIBS 98 | 99 | PKG_FILE2 ?= $(CURDIR)/.erlang.mk.packages.v2 100 | export PKG_FILE2 101 | 102 | PKG_FILE_URL ?= https://raw.githubusercontent.com/ninenines/erlang.mk/master/packages.v2.tsv 103 | 104 | # Core targets. 105 | 106 | deps:: $(ALL_DEPS_DIRS) 107 | @for dep in $(ALL_DEPS_DIRS) ; do \ 108 | if [ -f $$dep/GNUmakefile ] || [ -f $$dep/makefile ] || [ -f $$dep/Makefile ] ; then \ 109 | $(MAKE) -C $$dep ; \ 110 | else \ 111 | echo "include $(CURDIR)/erlang.mk" | $(MAKE) -f - -C $$dep ; \ 112 | fi ; \ 113 | done 114 | 115 | distclean:: distclean-deps distclean-pkg 116 | 117 | # Deps related targets. 118 | 119 | define dep_fetch 120 | if [ "$$$$VS" = "git" ]; then \ 121 | git clone -n -- $$$$REPO $(DEPS_DIR)/$(1); \ 122 | cd $(DEPS_DIR)/$(1) && git checkout -q $$$$COMMIT; \ 123 | elif [ "$$$$VS" = "hg" ]; then \ 124 | hg clone -U $$$$REPO $(DEPS_DIR)/$(1); \ 125 | cd $(DEPS_DIR)/$(1) && hg update -q $$$$COMMIT; \ 126 | else \ 127 | echo "Unknown or invalid dependency: $(1). Please consult the erlang.mk README for instructions." >&2; \ 128 | exit 78; \ 129 | fi 130 | endef 131 | 132 | define dep_target 133 | $(DEPS_DIR)/$(1): 134 | @mkdir -p $(DEPS_DIR) 135 | @if [ ! -f $(PKG_FILE2) ]; then $(call core_http_get,$(PKG_FILE2),$(PKG_FILE_URL)); fi 136 | ifeq (,$(dep_$(1))) 137 | @DEPPKG=$$$$(awk 'BEGIN { FS = "\t" }; $$$$1 == "$(1)" { print $$$$2 " " $$$$3 " " $$$$4 }' $(PKG_FILE2);); \ 138 | VS=$$$$(echo $$$$DEPPKG | cut -d " " -f1); \ 139 | REPO=$$$$(echo $$$$DEPPKG | cut -d " " -f2); \ 140 | COMMIT=$$$$(echo $$$$DEPPKG | cut -d " " -f3); \ 141 | $(call dep_fetch,$(1)) 142 | else 143 | @VS=$(word 1,$(dep_$(1))); \ 144 | REPO=$(word 2,$(dep_$(1))); \ 145 | COMMIT=$(word 3,$(dep_$(1))); \ 146 | $(call dep_fetch,$(1)) 147 | endif 148 | endef 149 | 150 | $(foreach dep,$(DEPS),$(eval $(call dep_target,$(dep)))) 151 | 152 | distclean-deps: 153 | $(gen_verbose) rm -rf $(DEPS_DIR) 154 | 155 | # Packages related targets. 156 | 157 | $(PKG_FILE2): 158 | @$(call core_http_get,$(PKG_FILE2),$(PKG_FILE_URL)) 159 | 160 | pkg-list: $(PKG_FILE2) 161 | @cat $(PKG_FILE2) | awk 'BEGIN { FS = "\t" }; { print \ 162 | "Name:\t\t" $$1 "\n" \ 163 | "Repository:\t" $$3 "\n" \ 164 | "Website:\t" $$5 "\n" \ 165 | "Description:\t" $$6 "\n" }' 166 | 167 | ifdef q 168 | pkg-search: $(PKG_FILE2) 169 | @cat $(PKG_FILE2) | grep -i ${q} | awk 'BEGIN { FS = "\t" }; { print \ 170 | "Name:\t\t" $$1 "\n" \ 171 | "Repository:\t" $$3 "\n" \ 172 | "Website:\t" $$5 "\n" \ 173 | "Description:\t" $$6 "\n" }' 174 | else 175 | pkg-search: 176 | $(error Usage: make pkg-search q=STRING) 177 | endif 178 | 179 | distclean-pkg: 180 | $(gen_verbose) rm -f $(PKG_FILE2) 181 | 182 | help:: 183 | @printf "%s\n" "" \ 184 | "Package-related targets:" \ 185 | " pkg-list List all known packages" \ 186 | " pkg-search q=STRING Search for STRING in the package index" 187 | 188 | # Copyright (c) 2013-2014, Loïc Hoguin 189 | # This file is part of erlang.mk and subject to the terms of the ISC License. 190 | 191 | .PHONY: clean-app 192 | 193 | # Configuration. 194 | 195 | ERLC_OPTS ?= -Werror +debug_info +warn_export_all +warn_export_vars \ 196 | +warn_shadow_vars +warn_obsolete_guard # +bin_opt_info +warn_missing_spec 197 | COMPILE_FIRST ?= 198 | COMPILE_FIRST_PATHS = $(addprefix src/,$(addsuffix .erl,$(COMPILE_FIRST))) 199 | 200 | # Verbosity. 201 | 202 | appsrc_verbose_0 = @echo " APP " $(PROJECT).app.src; 203 | appsrc_verbose = $(appsrc_verbose_$(V)) 204 | 205 | erlc_verbose_0 = @echo " ERLC " $(filter %.erl %.core,$(?F)); 206 | erlc_verbose = $(erlc_verbose_$(V)) 207 | 208 | xyrl_verbose_0 = @echo " XYRL " $(filter %.xrl %.yrl,$(?F)); 209 | xyrl_verbose = $(xyrl_verbose_$(V)) 210 | 211 | # Core targets. 212 | 213 | app:: erlc-include ebin/$(PROJECT).app 214 | $(eval MODULES := $(shell find ebin -type f -name \*.beam \ 215 | | sed "s/ebin\//'/;s/\.beam/',/" | sed '$$s/.$$//')) 216 | @if [ -z "$$(grep -E '^[^%]*{modules,' src/$(PROJECT).app.src)" ]; then \ 217 | echo "Empty modules entry not found in $(PROJECT).app.src. Please consult the erlang.mk README for instructions." >&2; \ 218 | exit 1; \ 219 | fi 220 | $(appsrc_verbose) cat src/$(PROJECT).app.src \ 221 | | sed "s/{modules,[[:space:]]*\[\]}/{modules, \[$(MODULES)\]}/" \ 222 | > ebin/$(PROJECT).app 223 | 224 | define compile_erl 225 | $(erlc_verbose) erlc -v $(ERLC_OPTS) -o ebin/ \ 226 | -pa ebin/ -I include/ $(COMPILE_FIRST_PATHS) $(1) 227 | endef 228 | 229 | define compile_xyrl 230 | $(xyrl_verbose) erlc -v -o ebin/ $(1) 231 | $(xyrl_verbose) erlc $(ERLC_OPTS) -o ebin/ ebin/*.erl 232 | @rm ebin/*.erl 233 | endef 234 | 235 | ifneq ($(wildcard src/),) 236 | ebin/$(PROJECT).app:: 237 | @mkdir -p ebin/ 238 | 239 | ebin/$(PROJECT).app:: $(shell find src -type f -name \*.erl) \ 240 | $(shell find src -type f -name \*.core) 241 | $(if $(strip $?),$(call compile_erl,$?)) 242 | 243 | ebin/$(PROJECT).app:: $(shell find src -type f -name \*.xrl) \ 244 | $(shell find src -type f -name \*.yrl) 245 | $(if $(strip $?),$(call compile_xyrl,$?)) 246 | endif 247 | 248 | clean:: clean-app 249 | 250 | # Extra targets. 251 | 252 | erlc-include: 253 | -@if [ -d ebin/ ]; then \ 254 | find include/ src/ -type f -name \*.hrl -newer ebin -exec touch $(shell find src/ -type f -name "*.erl") \; 2>/dev/null || printf ''; \ 255 | fi 256 | 257 | clean-app: 258 | $(gen_verbose) rm -rf ebin/ 259 | 260 | # Copyright (c) 2014, Loïc Hoguin 261 | # This file is part of erlang.mk and subject to the terms of the ISC License. 262 | 263 | .PHONY: bootstrap bootstrap-lib bootstrap-rel new list-templates 264 | 265 | # Core targets. 266 | 267 | help:: 268 | @printf "%s\n" "" \ 269 | "Bootstrap targets:" \ 270 | " bootstrap Generate a skeleton of an OTP application" \ 271 | " bootstrap-lib Generate a skeleton of an OTP library" \ 272 | " bootstrap-rel Generate the files needed to build a release" \ 273 | " new t=TPL n=NAME Generate a module NAME based on the template TPL" \ 274 | " list-templates List available templates" 275 | 276 | # Bootstrap templates. 277 | 278 | bs_appsrc = "{application, $(PROJECT), [" \ 279 | " {description, \"\"}," \ 280 | " {vsn, \"0.1.0\"}," \ 281 | " {modules, []}," \ 282 | " {registered, []}," \ 283 | " {applications, [" \ 284 | " kernel," \ 285 | " stdlib" \ 286 | " ]}," \ 287 | " {mod, {$(PROJECT)_app, []}}," \ 288 | " {env, []}" \ 289 | "]}." 290 | bs_appsrc_lib = "{application, $(PROJECT), [" \ 291 | " {description, \"\"}," \ 292 | " {vsn, \"0.1.0\"}," \ 293 | " {modules, []}," \ 294 | " {registered, []}," \ 295 | " {applications, [" \ 296 | " kernel," \ 297 | " stdlib" \ 298 | " ]}" \ 299 | "]}." 300 | bs_Makefile = "PROJECT = $(PROJECT)" \ 301 | "include erlang.mk" 302 | bs_app = "-module($(PROJECT)_app)." \ 303 | "-behaviour(application)." \ 304 | "" \ 305 | "-export([start/2])." \ 306 | "-export([stop/1])." \ 307 | "" \ 308 | "start(_Type, _Args) ->" \ 309 | " $(PROJECT)_sup:start_link()." \ 310 | "" \ 311 | "stop(_State) ->" \ 312 | " ok." 313 | bs_relx_config = "{release, {$(PROJECT)_release, \"1\"}, [$(PROJECT)]}." \ 314 | "{extended_start_script, true}." \ 315 | "{sys_config, \"rel/sys.config\"}." \ 316 | "{vm_args, \"rel/vm.args\"}." 317 | bs_sys_config = "[" \ 318 | "]." 319 | bs_vm_args = "-name $(PROJECT)@127.0.0.1" \ 320 | "-setcookie $(PROJECT)" \ 321 | "-heart" 322 | # Normal templates. 323 | tpl_supervisor = "-module($(n))." \ 324 | "-behaviour(supervisor)." \ 325 | "" \ 326 | "-export([start_link/0])." \ 327 | "-export([init/1])." \ 328 | "" \ 329 | "start_link() ->" \ 330 | " supervisor:start_link({local, ?MODULE}, ?MODULE, [])." \ 331 | "" \ 332 | "init([]) ->" \ 333 | " Procs = []," \ 334 | " {ok, {{one_for_one, 1, 5}, Procs}}." 335 | tpl_gen_server = "-module($(n))." \ 336 | "-behaviour(gen_server)." \ 337 | "" \ 338 | "%% API." \ 339 | "-export([start_link/0])." \ 340 | "" \ 341 | "%% gen_server." \ 342 | "-export([init/1])." \ 343 | "-export([handle_call/3])." \ 344 | "-export([handle_cast/2])." \ 345 | "-export([handle_info/2])." \ 346 | "-export([terminate/2])." \ 347 | "-export([code_change/3])." \ 348 | "" \ 349 | "-record(state, {" \ 350 | "})." \ 351 | "" \ 352 | "%% API." \ 353 | "" \ 354 | "-spec start_link() -> {ok, pid()}." \ 355 | "start_link() ->" \ 356 | " gen_server:start_link(?MODULE, [], [])." \ 357 | "" \ 358 | "%% gen_server." \ 359 | "" \ 360 | "init([]) ->" \ 361 | " {ok, \#state{}}." \ 362 | "" \ 363 | "handle_call(_Request, _From, State) ->" \ 364 | " {reply, ignored, State}." \ 365 | "" \ 366 | "handle_cast(_Msg, State) ->" \ 367 | " {noreply, State}." \ 368 | "" \ 369 | "handle_info(_Info, State) ->" \ 370 | " {noreply, State}." \ 371 | "" \ 372 | "terminate(_Reason, _State) ->" \ 373 | " ok." \ 374 | "" \ 375 | "code_change(_OldVsn, State, _Extra) ->" \ 376 | " {ok, State}." 377 | tpl_cowboy_http = "-module($(n))." \ 378 | "-behaviour(cowboy_http_handler)." \ 379 | "" \ 380 | "-export([init/3])." \ 381 | "-export([handle/2])." \ 382 | "-export([terminate/3])." \ 383 | "" \ 384 | "-record(state, {" \ 385 | "})." \ 386 | "" \ 387 | "init(_, Req, _Opts) ->" \ 388 | " {ok, Req, \#state{}}." \ 389 | "" \ 390 | "handle(Req, State=\#state{}) ->" \ 391 | " {ok, Req2} = cowboy_req:reply(200, Req)," \ 392 | " {ok, Req2, State}." \ 393 | "" \ 394 | "terminate(_Reason, _Req, _State) ->" \ 395 | " ok." 396 | tpl_cowboy_loop = "-module($(n))." \ 397 | "-behaviour(cowboy_loop_handler)." \ 398 | "" \ 399 | "-export([init/3])." \ 400 | "-export([info/3])." \ 401 | "-export([terminate/3])." \ 402 | "" \ 403 | "-record(state, {" \ 404 | "})." \ 405 | "" \ 406 | "init(_, Req, _Opts) ->" \ 407 | " {loop, Req, \#state{}, 5000, hibernate}." \ 408 | "" \ 409 | "info(_Info, Req, State) ->" \ 410 | " {loop, Req, State, hibernate}." \ 411 | "" \ 412 | "terminate(_Reason, _Req, _State) ->" \ 413 | " ok." 414 | tpl_cowboy_rest = "-module($(n))." \ 415 | "" \ 416 | "-export([init/3])." \ 417 | "-export([content_types_provided/2])." \ 418 | "-export([get_html/2])." \ 419 | "" \ 420 | "init(_, _Req, _Opts) ->" \ 421 | " {upgrade, protocol, cowboy_rest}." \ 422 | "" \ 423 | "content_types_provided(Req, State) ->" \ 424 | " {[{{<<\"text\">>, <<\"html\">>, '*'}, get_html}], Req, State}." \ 425 | "" \ 426 | "get_html(Req, State) ->" \ 427 | " {<<\"This is REST!\">>, Req, State}." 428 | tpl_cowboy_ws = "-module($(n))." \ 429 | "-behaviour(cowboy_websocket_handler)." \ 430 | "" \ 431 | "-export([init/3])." \ 432 | "-export([websocket_init/3])." \ 433 | "-export([websocket_handle/3])." \ 434 | "-export([websocket_info/3])." \ 435 | "-export([websocket_terminate/3])." \ 436 | "" \ 437 | "-record(state, {" \ 438 | "})." \ 439 | "" \ 440 | "init(_, _, _) ->" \ 441 | " {upgrade, protocol, cowboy_websocket}." \ 442 | "" \ 443 | "websocket_init(_, Req, _Opts) ->" \ 444 | " Req2 = cowboy_req:compact(Req)," \ 445 | " {ok, Req2, \#state{}}." \ 446 | "" \ 447 | "websocket_handle({text, Data}, Req, State) ->" \ 448 | " {reply, {text, Data}, Req, State};" \ 449 | "websocket_handle({binary, Data}, Req, State) ->" \ 450 | " {reply, {binary, Data}, Req, State};" \ 451 | "websocket_handle(_Frame, Req, State) ->" \ 452 | " {ok, Req, State}." \ 453 | "" \ 454 | "websocket_info(_Info, Req, State) ->" \ 455 | " {ok, Req, State}." \ 456 | "" \ 457 | "websocket_terminate(_Reason, _Req, _State) ->" \ 458 | " ok." 459 | tpl_ranch_protocol = "-module($(n))." \ 460 | "-behaviour(ranch_protocol)." \ 461 | "" \ 462 | "-export([start_link/4])." \ 463 | "-export([init/4])." \ 464 | "" \ 465 | "-type opts() :: []." \ 466 | "-export_type([opts/0])." \ 467 | "" \ 468 | "-record(state, {" \ 469 | " socket :: inet:socket()," \ 470 | " transport :: module()" \ 471 | "})." \ 472 | "" \ 473 | "start_link(Ref, Socket, Transport, Opts) ->" \ 474 | " Pid = spawn_link(?MODULE, init, [Ref, Socket, Transport, Opts])," \ 475 | " {ok, Pid}." \ 476 | "" \ 477 | "-spec init(ranch:ref(), inet:socket(), module(), opts()) -> ok." \ 478 | "init(Ref, Socket, Transport, _Opts) ->" \ 479 | " ok = ranch:accept_ack(Ref)," \ 480 | " loop(\#state{socket=Socket, transport=Transport})." \ 481 | "" \ 482 | "loop(State) ->" \ 483 | " loop(State)." 484 | 485 | # Plugin-specific targets. 486 | 487 | bootstrap: 488 | ifneq ($(wildcard src/),) 489 | $(error Error: src/ directory already exists) 490 | endif 491 | @printf "%s\n" $(bs_Makefile) > Makefile 492 | @mkdir src/ 493 | @printf "%s\n" $(bs_appsrc) > src/$(PROJECT).app.src 494 | @printf "%s\n" $(bs_app) > src/$(PROJECT)_app.erl 495 | $(eval n := $(PROJECT)_sup) 496 | @printf "%s\n" $(tpl_supervisor) > src/$(PROJECT)_sup.erl 497 | 498 | bootstrap-lib: 499 | ifneq ($(wildcard src/),) 500 | $(error Error: src/ directory already exists) 501 | endif 502 | @printf "%s\n" $(bs_Makefile) > Makefile 503 | @mkdir src/ 504 | @printf "%s\n" $(bs_appsrc_lib) > src/$(PROJECT).app.src 505 | 506 | bootstrap-rel: 507 | ifneq ($(wildcard relx.config),) 508 | $(error Error: relx.config already exists) 509 | endif 510 | ifneq ($(wildcard rel/),) 511 | $(error Error: rel/ directory already exists) 512 | endif 513 | @printf "%s\n" $(bs_relx_config) > relx.config 514 | @mkdir rel/ 515 | @printf "%s\n" $(bs_sys_config) > rel/sys.config 516 | @printf "%s\n" $(bs_vm_args) > rel/vm.args 517 | 518 | new: 519 | ifeq ($(wildcard src/),) 520 | $(error Error: src/ directory does not exist) 521 | endif 522 | ifndef t 523 | $(error Usage: make new t=TEMPLATE n=NAME) 524 | endif 525 | ifndef tpl_$(t) 526 | $(error Unknown template) 527 | endif 528 | ifndef n 529 | $(error Usage: make new t=TEMPLATE n=NAME) 530 | endif 531 | @printf "%s\n" $(tpl_$(t)) > src/$(n).erl 532 | 533 | list-templates: 534 | @echo Available templates: $(sort $(patsubst tpl_%,%,$(filter tpl_%,$(.VARIABLES)))) 535 | 536 | # Copyright (c) 2013-2014, Loïc Hoguin 537 | # This file is part of erlang.mk and subject to the terms of the ISC License. 538 | 539 | .PHONY: build-ct-deps build-ct-suites tests-ct clean-ct distclean-ct 540 | 541 | # Configuration. 542 | 543 | CT_OPTS ?= 544 | ifneq ($(wildcard test/),) 545 | CT_SUITES ?= $(sort $(subst _SUITE.erl,,$(shell find test -type f -name \*_SUITE.erl -exec basename {} \;))) 546 | else 547 | CT_SUITES ?= 548 | endif 549 | 550 | TEST_ERLC_OPTS ?= +debug_info +warn_export_vars +warn_shadow_vars +warn_obsolete_guard 551 | TEST_ERLC_OPTS += -DTEST=1 -DEXTRA=1 +'{parse_transform, eunit_autoexport}' 552 | 553 | # Core targets. 554 | 555 | tests:: tests-ct 556 | 557 | clean:: clean-ct 558 | 559 | distclean:: distclean-ct 560 | 561 | help:: 562 | @printf "%s\n" "" \ 563 | "All your common_test suites have their associated targets." \ 564 | "A suite named http_SUITE can be ran using the ct-http target." 565 | 566 | # Plugin-specific targets. 567 | 568 | ALL_TEST_DEPS_DIRS = $(addprefix $(DEPS_DIR)/,$(TEST_DEPS)) 569 | 570 | CT_RUN = ct_run \ 571 | -no_auto_compile \ 572 | -noshell \ 573 | -pa $(realpath ebin) $(DEPS_DIR)/*/ebin \ 574 | -dir test \ 575 | -logdir logs 576 | 577 | $(foreach dep,$(TEST_DEPS),$(eval $(call dep_target,$(dep)))) 578 | 579 | build-ct-deps: $(ALL_TEST_DEPS_DIRS) 580 | @for dep in $(ALL_TEST_DEPS_DIRS) ; do $(MAKE) -C $$dep; done 581 | 582 | build-ct-suites: build-ct-deps 583 | $(gen_verbose) erlc -v $(TEST_ERLC_OPTS) -o test/ \ 584 | $(wildcard test/*.erl test/*/*.erl) -pa ebin/ 585 | 586 | tests-ct: ERLC_OPTS = $(TEST_ERLC_OPTS) 587 | tests-ct: clean deps app build-ct-suites 588 | @if [ -d "test" ] ; \ 589 | then \ 590 | mkdir -p logs/ ; \ 591 | $(CT_RUN) -suite $(addsuffix _SUITE,$(CT_SUITES)) $(CT_OPTS) ; \ 592 | fi 593 | $(gen_verbose) rm -f test/*.beam 594 | 595 | define ct_suite_target 596 | ct-$(1): ERLC_OPTS = $(TEST_ERLC_OPTS) 597 | ct-$(1): clean deps app build-ct-suites 598 | @if [ -d "test" ] ; \ 599 | then \ 600 | mkdir -p logs/ ; \ 601 | $(CT_RUN) -suite $(addsuffix _SUITE,$(1)) $(CT_OPTS) ; \ 602 | fi 603 | $(gen_verbose) rm -f test/*.beam 604 | endef 605 | 606 | $(foreach test,$(CT_SUITES),$(eval $(call ct_suite_target,$(test)))) 607 | 608 | clean-ct: 609 | $(gen_verbose) rm -rf test/*.beam 610 | 611 | distclean-ct: 612 | $(gen_verbose) rm -rf logs/ 613 | 614 | # Copyright (c) 2013-2014, Loïc Hoguin 615 | # This file is part of erlang.mk and subject to the terms of the ISC License. 616 | 617 | .PHONY: plt distclean-plt dialyze 618 | 619 | # Configuration. 620 | 621 | DIALYZER_PLT ?= $(CURDIR)/.$(PROJECT).plt 622 | export DIALYZER_PLT 623 | 624 | PLT_APPS ?= 625 | DIALYZER_OPTS ?= -Werror_handling -Wrace_conditions \ 626 | -Wunmatched_returns # -Wunderspecs 627 | 628 | # Core targets. 629 | 630 | distclean:: distclean-plt 631 | 632 | help:: 633 | @printf "%s\n" "" \ 634 | "Dialyzer targets:" \ 635 | " plt Build a PLT file for this project" \ 636 | " dialyze Analyze the project using Dialyzer" 637 | 638 | # Plugin-specific targets. 639 | 640 | $(DIALYZER_PLT): deps app 641 | @dialyzer --build_plt --apps erts kernel stdlib $(PLT_APPS) $(ALL_DEPS_DIRS) 642 | 643 | plt: $(DIALYZER_PLT) 644 | 645 | distclean-plt: 646 | $(gen_verbose) rm -f $(DIALYZER_PLT) 647 | 648 | ifneq ($(wildcard $(DIALYZER_PLT)),) 649 | dialyze: 650 | else 651 | dialyze: $(DIALYZER_PLT) 652 | endif 653 | @dialyzer --no_native --src -r src $(DIALYZER_OPTS) 654 | 655 | # Copyright (c) 2013-2014, Loïc Hoguin 656 | # This file is part of erlang.mk and subject to the terms of the ISC License. 657 | 658 | # Verbosity. 659 | 660 | dtl_verbose_0 = @echo " DTL " $(filter %.dtl,$(?F)); 661 | dtl_verbose = $(dtl_verbose_$(V)) 662 | 663 | # Core targets. 664 | 665 | define compile_erlydtl 666 | $(dtl_verbose) erl -noshell -pa ebin/ $(DEPS_DIR)/erlydtl/ebin/ -eval ' \ 667 | Compile = fun(F) -> \ 668 | Module = list_to_atom( \ 669 | string:to_lower(filename:basename(F, ".dtl")) ++ "_dtl"), \ 670 | erlydtl:compile(F, Module, [{out_dir, "ebin/"}]) \ 671 | end, \ 672 | _ = [Compile(F) || F <- string:tokens("$(1)", " ")], \ 673 | init:stop()' 674 | endef 675 | 676 | ifneq ($(wildcard src/),) 677 | ebin/$(PROJECT).app:: $(shell find templates -type f -name \*.dtl 2>/dev/null) 678 | $(if $(strip $?),$(call compile_erlydtl,$?)) 679 | endif 680 | 681 | # Copyright (c) 2013-2014, Loïc Hoguin 682 | # This file is part of erlang.mk and subject to the terms of the ISC License. 683 | 684 | .PHONY: relx-rel distclean-relx-rel distclean-relx 685 | 686 | # Configuration. 687 | 688 | RELX_CONFIG ?= $(CURDIR)/relx.config 689 | 690 | RELX ?= $(CURDIR)/relx 691 | export RELX 692 | 693 | RELX_URL ?= https://github.com/erlware/relx/releases/download/v1.0.2/relx 694 | RELX_OPTS ?= 695 | RELX_OUTPUT_DIR ?= _rel 696 | 697 | ifeq ($(firstword $(RELX_OPTS)),-o) 698 | RELX_OUTPUT_DIR = $(word 2,$(RELX_OPTS)) 699 | else 700 | RELX_OPTS += -o $(RELX_OUTPUT_DIR) 701 | endif 702 | 703 | # Core targets. 704 | 705 | ifneq ($(wildcard $(RELX_CONFIG)),) 706 | rel:: distclean-relx-rel relx-rel 707 | endif 708 | 709 | distclean:: distclean-relx-rel distclean-relx 710 | 711 | # Plugin-specific targets. 712 | 713 | define relx_fetch 714 | $(call core_http_get,$(RELX),$(RELX_URL)) 715 | chmod +x $(RELX) 716 | 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p.access(this,function(c,d,e){var f;return p.isWindow(c)?c.document.documentElement["client"+a]:c.nodeType===9?(f=c.documentElement,Math.max(c.body["scroll"+a],f["scroll"+a],c.body["offset"+a],f["offset"+a],f["client"+a])):e===b?p.css(c,d,e,h):p.style(c,d,e,h)},c,g?e:b,g)}})}),a.jQuery=a.$=p,typeof define=="function"&&define.amd&&define.amd.jQuery&&define("jquery",[],function(){return p})})(window); -------------------------------------------------------------------------------- /relx.config: -------------------------------------------------------------------------------- 1 | {release, {chat_demo, "1"}, [chat_demo]}. 2 | {extended_start_script, true}. 3 | -------------------------------------------------------------------------------- /src/chat_demo.app.src: -------------------------------------------------------------------------------- 1 | %% Feel free to use, reuse and abuse the code in this file. 2 | 3 | {application, chat_demo, [ 4 | {description, "Cowboy chat demo."}, 5 | {vsn, "1"}, 6 | {modules, []}, 7 | {registered, [chat_demo_sup,chat_server]}, 8 | {applications, [ 9 | kernel, 10 | stdlib, 11 | cowboy 12 | ]}, 13 | {mod, {chat_demo_app, []}}, 14 | {env, []} 15 | ]}. 16 | -------------------------------------------------------------------------------- /src/chat_demo.erl: -------------------------------------------------------------------------------- 1 | %% Copyright (c) 2011-2014 Robert Virding. All rights reserved. 2 | %% 3 | %% Redistribution and use in source and binary forms, with or without 4 | %% modification, are permitted provided that the following conditions 5 | %% are met: 6 | %% 7 | %% 1. Redistributions of source code must retain the above copyright 8 | %% notice, this list of conditions and the following disclaimer. 9 | %% 2. Redistributions in binary form must reproduce the above copyright 10 | %% notice, this list of conditions and the following disclaimer in the 11 | %% documentation and/or other materials provided with the distribution. 12 | %% 13 | %% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | %% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | %% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | %% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | %% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | %% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | %% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | %% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | %% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | %% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | %% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | %% POSSIBILITY OF SUCH DAMAGE. 25 | 26 | -module(chat_demo). 27 | 28 | -export([start/0]). 29 | 30 | start() -> 31 | %% Start the necessary applications. 32 | ok = application:start(crypto), 33 | ok = application:start(cowlib), 34 | ok = application:start(ranch), 35 | ok = application:start(cowboy), 36 | %% Start the chat_demo application. 37 | application:start(chat_demo). 38 | -------------------------------------------------------------------------------- /src/chat_demo_app.erl: -------------------------------------------------------------------------------- 1 | %% Feel free to use, reuse and abuse the code in this file. 2 | 3 | %% @private 4 | -module(chat_demo_app). 5 | -behaviour(application). 6 | 7 | %% API. 8 | -export([start/2]). 9 | -export([stop/1]). 10 | 11 | %% API. 12 | start(_Type, _Args) -> 13 | One = {'_', 14 | [ 15 | {"/", cowboy_static, {priv_file, chat_demo, "index.html"}}, 16 | {"/websocket", chat_ws_handler, []}, 17 | {"/static/[...]", cowboy_static, {priv_dir, chat_demo, "static"}} 18 | ]}, 19 | Dispatch = cowboy_router:compile([One]), 20 | {ok, _} = cowboy:start_http(http, 100, [{port, 8080}], 21 | [{env, [{dispatch, Dispatch}]}]), 22 | chat_demo_sup:start_link(). 23 | 24 | stop(_State) -> 25 | ok. 26 | -------------------------------------------------------------------------------- /src/chat_demo_sup.erl: -------------------------------------------------------------------------------- 1 | %% Copyright (c) 2011-2014 Robert Virding. All rights reserved. 2 | %% 3 | %% Redistribution and use in source and binary forms, with or without 4 | %% modification, are permitted provided that the following conditions 5 | %% are met: 6 | %% 7 | %% 1. Redistributions of source code must retain the above copyright 8 | %% notice, this list of conditions and the following disclaimer. 9 | %% 2. Redistributions in binary form must reproduce the above copyright 10 | %% notice, this list of conditions and the following disclaimer in the 11 | %% documentation and/or other materials provided with the distribution. 12 | %% 13 | %% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | %% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | %% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | %% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | %% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | %% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | %% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | %% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | %% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | %% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | %% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | %% POSSIBILITY OF SUCH DAMAGE. 25 | 26 | -module(chat_demo_sup). 27 | 28 | -behaviour(supervisor). 29 | 30 | %% API 31 | -export([start_link/0]). 32 | 33 | %% Supervisor callback. 34 | -export([init/1]). 35 | 36 | start_link() -> 37 | supervisor:start_link({local,?MODULE}, ?MODULE, []). 38 | 39 | init([]) -> 40 | %% Just start the backend server. 41 | Backend = {chat_server,{chat_server,start_link,[]},transient,2000, 42 | worker,[chat_server]}, 43 | Procs = [Backend], 44 | {ok,{{one_for_one,10,10},Procs}}. 45 | -------------------------------------------------------------------------------- /src/chat_server.erl: -------------------------------------------------------------------------------- 1 | %% Copyright (c) 2011-2014 Robert Virding. All rights reserved. 2 | %% 3 | %% Redistribution and use in source and binary forms, with or without 4 | %% modification, are permitted provided that the following conditions 5 | %% are met: 6 | %% 7 | %% 1. Redistributions of source code must retain the above copyright 8 | %% notice, this list of conditions and the following disclaimer. 9 | %% 2. Redistributions in binary form must reproduce the above copyright 10 | %% notice, this list of conditions and the following disclaimer in the 11 | %% documentation and/or other materials provided with the distribution. 12 | %% 13 | %% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | %% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | %% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | %% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | %% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | %% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | %% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | %% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | %% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | %% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | %% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | %% POSSIBILITY OF SUCH DAMAGE. 25 | 26 | -module(chat_server). 27 | 28 | -behaviour(gen_server). 29 | 30 | %% API 31 | 32 | -export([start_link/0,start/0,stop/0]). 33 | -export([new_user/0,set_nick/1,send_message/1]). 34 | 35 | %% Behaviour callbacks. 36 | -export([init/1,terminate/2, 37 | handle_call/3,handle_cast/2,handle_info/2, 38 | code_change/3]). 39 | 40 | -import(lists, [reverse/1,foreach/2]). 41 | 42 | -record(st, {buf=new_buf(),users=[]}). %Server state 43 | -record(user, {pid,nick=[]}). %User info 44 | 45 | %% Management API 46 | 47 | start_link() -> 48 | gen_server:start_link({local,?MODULE}, ?MODULE, [], []). 49 | 50 | start() -> 51 | gen_server:start({local,?MODULE}, ?MODULE, [], []). 52 | 53 | stop() -> 54 | gen_server:call(?MODULE, stop). 55 | 56 | %% User API 57 | 58 | new_user() -> 59 | gen_server:call(?MODULE, {new_user,self()}). 60 | 61 | set_nick(Nick) -> 62 | gen_server:call(?MODULE, {set_nick,self(),Nick}). 63 | 64 | send_message(Msg) -> 65 | gen_server:cast(?MODULE, {message,self(),Msg}). 66 | 67 | %% Callbacks. 68 | 69 | init(_) -> 70 | process_flag(trap_exit, true), 71 | {ok,#st{buf=new_buf(),users=[]}}. 72 | 73 | terminate(_Reason, _St) -> 74 | ok. 75 | 76 | handle_call(stop, _, St) -> %Stop the server 77 | {stop,normal,ok,St}; 78 | handle_call({new_user,Pid}, _, St) -> %Add a user 79 | link(Pid), %Link to user 80 | Us = add_user(Pid, St#st.users), 81 | send_msgs(Pid, St#st.buf), 82 | {reply,ok,St#st{users=Us}}; 83 | handle_call({set_nick,Pid,Nick}, _, St) -> %Set the nick for a user 84 | Us = set_nick(Nick, Pid, St#st.users), 85 | {reply,ok,St#st{users=Us}}; 86 | handle_call(_Other, _, St) -> %Other messages 87 | {reply,{error,request},St}. 88 | 89 | handle_cast({message,Pid,Text}, #st{users=Us}=St) -> 90 | Msg = build_msg(Pid, Text, Us), 91 | broadcast_msg(Msg, Us), 92 | Buf = buffer_msg(Msg, St#st.buf), 93 | {noreply,St#st{buf=Buf}}; 94 | handle_cast(_Other, St) -> %Ignore unknown messages 95 | {noreply,St}. 96 | 97 | handle_info({'EXIT',Pid,_}, St) -> %User process has died 98 | Us = del_user(Pid, St#st.users), 99 | {noreply,St#st{users=Us}}; 100 | handle_info(_Other, St) -> %Ignore unknown messages 101 | {noreply,St}. 102 | 103 | code_change(_Vsn, St, _Extra) -> 104 | {ok,St}. 105 | 106 | %% new_buf() -> Buffer. 107 | %% get_msgs(Buffer) -> [Msg]. 108 | %% buffer_msg(Message, Buffer) -> Buffer. 109 | %% The message is a queue structure with a count. We save max 20 110 | %% messages in buffer. The buffer is {Count,Back,Front}. Messages are 111 | %% pushed onto the back and drop off the front. Like a queue. 112 | 113 | new_buf() -> {0,[],[]}. 114 | 115 | get_msgs({_,B,F}) -> F ++ reverse(B). 116 | 117 | buffer_msg(Msg, {C,B,F}) when C < 20 -> 118 | {C+1,[Msg|B],F}; 119 | buffer_msg(Msg, {20,B,[_|F]}) -> {20,[Msg|B],F}; 120 | buffer_msg(Msg, {20,B,[]}) -> 121 | buffer_msg(Msg, {20,[],reverse(B)}). 122 | 123 | %% broadcast_msg(Msg, [Users]) -> ok. 124 | %% send_msgs(Pid, Buf) -> ok. 125 | 126 | broadcast_msg(Msg, Us) -> 127 | foreach(fun (U) -> send_msg(U#user.pid, Msg) end, Us). 128 | 129 | send_msgs(Pid, Buf) -> 130 | foreach(fun (M) -> send_msg(Pid, M) end, get_msgs(Buf)). 131 | 132 | send_msg(Pid, Msg) -> Pid ! {chat_server,{message,Msg}}. 133 | 134 | build_msg(Pid, Text, Users) -> 135 | [get_nick(Pid, Users),": ",Text]. 136 | 137 | %% add_user(Pid, Users) -> Users. 138 | %% del_user(Pid, Users) -> Users. 139 | %% set_nick(Nick, Pid, Users) -> Users. 140 | %% get_nick(Pid, Users) -> Nick. 141 | %% Work with user info. 142 | 143 | add_user(Pid, Users) -> [#user{pid=Pid,nick="Anon"}|Users]. 144 | 145 | del_user(Pid, [#user{pid=Pid}|Us]) -> Us; 146 | del_user(Pid, [U|Us]) -> [U|del_user(Pid, Us)]; 147 | del_user(_, []) -> []. 148 | 149 | set_nick(Nick, Pid, [#user{pid=Pid}=U|Us]) -> 150 | [U#user{nick=Nick}|Us]; 151 | set_nick(Nick, Pid, [U|Us]) -> [U|set_nick(Nick, Pid, Us)]; 152 | set_nick(_, _, []) -> []. %Be kind 153 | 154 | get_nick(Pid, [#user{pid=Pid,nick=Nick}|_]) -> Nick; 155 | get_nick(Pid, [_|Us]) -> get_nick(Pid, Us); 156 | get_nick(_, []) -> "Unknown". %Be kind 157 | -------------------------------------------------------------------------------- /src/chat_server.lfe: -------------------------------------------------------------------------------- 1 | ;; Copyright (c) 2011-2014 Robert Virding. All rights reserved. 2 | ;; 3 | ;; Redistribution and use in source and binary forms, with or without 4 | ;; modification, are permitted provided that the following conditions 5 | ;; are met: 6 | ;; 7 | ;; 1. Redistributions of source code must retain the above copyright 8 | ;; notice, this list of conditions and the following disclaimer. 9 | ;; 2. Redistributions in binary form must reproduce the above copyright 10 | ;; notice, this list of conditions and the following disclaimer in the 11 | ;; documentation and/or other materials provided with the distribution. 12 | ;; 13 | ;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | ;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | ;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | ;; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | ;; COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | ;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | ;; BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | ;; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | ;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | ;; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | ;; ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | ;; POSSIBILITY OF SUCH DAMAGE. 25 | 26 | (defmodule chat_server 27 | (behaviour gen_server) 28 | ;; API 29 | (export (start_link 0) (start 0) (stop 0)) 30 | (export (new_user 0) (set_nick 1) (send_message 1)) 31 | ;; Behaviour callbacks. 32 | (export (init 1) (terminate 2) 33 | (handle_call 3) (handle_cast 2) (handle_info 2) 34 | (code_change 3)) 35 | (import (from lists (reverse 1) (foreach 2)))) 36 | 37 | (defrecord st (buf (new-buf)) (users ())) ;Server state 38 | (defrecord user pid (nick ())) ;User info 39 | 40 | ;; Management API 41 | 42 | (defun start_link () 43 | (: gen_server start_link #(local chat_server) 'chat_server () ())) 44 | 45 | (defun start () 46 | (: gen_server start #(local chat_server) 'chat_server () ())) 47 | 48 | (defun stop () 49 | (: gen_server call 'chat_server 'stop)) 50 | 51 | ;; User API 52 | 53 | (defun new_user () 54 | (gen_server:call 'chat_server `#(new-user ,(self)))) 55 | 56 | (defun set_nick (nick) 57 | (gen_server:call 'chat_server `#(set-nick ,(self) ,nick))) 58 | 59 | (defun send_message (msg) 60 | (gen_server:call 'chat_server `#('message ,(self) msg))) 61 | 62 | ;; Callbacks. 63 | 64 | (defun init (_) 65 | (process_flag 'trap_exit 'true) 66 | `#(ok ,(make-st buf (new-buf) users ()))) 67 | 68 | (defun terminate (reason st) 69 | 'ok) 70 | 71 | (defun handle_call 72 | (['stop _ st] ;Stop the server 73 | `#(stop normal ok ,st)) 74 | ([`#(new-user ,pid) _ st] ;Add a user 75 | (link pid) ;Link to user 76 | (let ((us (add-user pid (st-users st)))) 77 | (send-msgs pid (st-buf st)) 78 | `#(reply ok ,(set-st-users st us)))) 79 | ([`#(set-nick ,pid ,nick) _ st] ;Set the nick for a user 80 | (let ((us (set-nick nick pid (st-users st)))) 81 | `#(reply ok ,(set-st-users st us)))) 82 | ([_ _ st] ;Ignore unknown messages 83 | `#(reply #(error request) ,st))) 84 | 85 | (defun handle_cast 86 | ([`#(message ,pid ,text) st] 87 | (let ((msg (build-msg pid text (st-users st)))) 88 | (broadcast-msg msg (st-users st)) 89 | (let ((buf (buffer-msg msg (st-buf st)))) 90 | `#(noreply ,(set-st-buf st buf))))) 91 | ([_ st] ;Ignore unknown messages 92 | `#(noreply ,st))) 93 | 94 | (defun handle_info 95 | ([`#(EXIT ,pid ,_) st] ;User process has died 96 | (let ((us (del-user pid (st-users st)))) 97 | `#(noreply ,(set-st-users st us)))) 98 | ([_ st] ;Ignore unknown messages 99 | `#(noreply ,st))) 100 | 101 | (defun code_change (vsn st extra) 102 | `#(ok ,st)) 103 | 104 | ;; new-buf() -> Buffer. 105 | ;; get-msgs(Buffer) -> [Msg]. 106 | ;; buffer-msg(Message, Buffer) -> Buffer. 107 | ;; The message is a queue structure with a count. We save max 20 108 | ;; messages in buffer. The buffer is #(count back front). Messages 109 | ;; are pushed onto the back and drop off the front. Like a queue. 110 | 111 | (defun new-buf () (tuple 0 () ())) 112 | 113 | (defun get-msgs ([(tuple _ b f)] (++ f (reverse b)))) 114 | 115 | (defun buffer-msg 116 | ([msg (tuple c b f)] (when (< c 20)) 117 | (tuple (+ c 1) (cons msg b) f)) 118 | ([msg (tuple 20 b (cons _ f))] (tuple 20 (cons msg b) f)) 119 | ([msg (tuple 20 b ())] 120 | (buffer-msg msg (tuple 20 () (reverse b))))) 121 | 122 | ;; broadcast-msg(Msg, [Users]) -> ok. 123 | ;; send-msgs(Pid, Buf) -> ok. 124 | 125 | (defun broadcast-msg (msg us) 126 | (foreach (lambda (u) (send-msg (user-pid u) msg)) us)) 127 | 128 | (defun send-msgs (pid buf) 129 | (foreach (lambda (m) (send-msg pid m)) (get-msgs buf))) 130 | 131 | (defun send-msg (pid msg) (! pid (tuple 'chat_server (tuple 'message msg)))) 132 | 133 | (defun build-msg (pid text users) (list (get-nick pid users) '": " text)) 134 | 135 | ;; add-user(Pid, Users) -> Users. 136 | ;; del-user(Pid, Users) -> Users. 137 | ;; set-nick(Nick, Pid, Users) -> Users. 138 | ;; get-nick(Pid, Users) -> Nick. 139 | ;; Work with user info. 140 | 141 | (defun add-user (pid us) 142 | (cons (make-user pid pid nick '"Anon") us)) 143 | 144 | (defun del-user 145 | ([pid (cons (match-user pid p) us)] (when (=:= pid p)) us) 146 | ([pid (cons u us)] (cons u (del-user pid us))) 147 | ([_ ()] ())) 148 | 149 | (defun set-nick (nick pid us0) 150 | (case us0 151 | ((cons (= (match-user pid pid) u) us) 152 | (cons (set-user-nick u nick) us)) 153 | ((cons u us) (cons u (set-nick nick pid us))) 154 | (() ()))) ;Be kind 155 | 156 | (defun get-nick 157 | ([pid (cons (match-user pid p nick nick) _)] (when (=:= pid p)) nick) 158 | ([pid (cons _ us)] (get-nick pid us)) 159 | ([_ ()] '"Unknown")) ;Be kind 160 | -------------------------------------------------------------------------------- /src/chat_ws_handler.erl: -------------------------------------------------------------------------------- 1 | %% Copyright (c) 2011-2014 Robert Virding. All rights reserved. 2 | %% 3 | %% Redistribution and use in source and binary forms, with or without 4 | %% modification, are permitted provided that the following conditions 5 | %% are met: 6 | %% 7 | %% 1. Redistributions of source code must retain the above copyright 8 | %% notice, this list of conditions and the following disclaimer. 9 | %% 2. Redistributions in binary form must reproduce the above copyright 10 | %% notice, this list of conditions and the following disclaimer in the 11 | %% documentation and/or other materials provided with the distribution. 12 | %% 13 | %% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | %% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | %% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | %% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | %% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | %% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | %% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | %% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | %% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | %% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | %% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | %% POSSIBILITY OF SUCH DAMAGE. 25 | 26 | -module(chat_ws_handler). 27 | 28 | %% Cowboy callbacks. 29 | -export([init/2,websocket_handle/3,websocket_info/3]). 30 | 31 | %% Internal state 32 | -record(state, {opts=[]}). 33 | 34 | init(Req, Opts) -> 35 | chat_server:new_user(), %A new user 36 | {cowboy_websocket,Req,#state{opts=Opts}}. 37 | 38 | %% Callback on received websockets data. 39 | 40 | websocket_handle({text,Data}, Req, St) -> 41 | io:fwrite("ws text: ~p\n", [Data]), 42 | %% Handle message types. 43 | case Data of 44 | <<"msg ! ",Msg/binary>> -> %A message 45 | chat_server:send_message(Msg), 46 | {ok,Req,St}; 47 | <<"nick ! ",Nick/binary>> -> %Set the nick 48 | chat_server:set_nick(Nick), 49 | {ok,Req,St}; 50 | _ -> 51 | {reply,{text,["status ! received '",Data,"'"]},Req,St} 52 | end; 53 | websocket_handle(Other, Req, St) -> 54 | io:format("ws other: ~p\n", [Other]), 55 | {ok,Req,St}. 56 | 57 | %% Callback on message from erlang. 58 | 59 | websocket_info({chat_server,{message,Msg}}, Req, St) -> 60 | io:format("cs text: ~p\n", [Msg]), 61 | {reply,{text,["output ! ",Msg]},Req,St}; 62 | websocket_info(Other, Req, St) -> 63 | io:format("cs other: ~p\n", [Other]), 64 | {ok,Req,St}. 65 | -------------------------------------------------------------------------------- /src/chat_ws_handler.lfe: -------------------------------------------------------------------------------- 1 | ;; Copyright (c) 2011-2014 Robert Virding. All rights reserved. 2 | ;; 3 | ;; Redistribution and use in source and binary forms, with or without 4 | ;; modification, are permitted provided that the following conditions 5 | ;; are met: 6 | ;; 7 | ;; 1. Redistributions of source code must retain the above copyright 8 | ;; notice, this list of conditions and the following disclaimer. 9 | ;; 2. Redistributions in binary form must reproduce the above copyright 10 | ;; notice, this list of conditions and the following disclaimer in the 11 | ;; documentation and/or other materials provided with the distribution. 12 | ;; 13 | ;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 14 | ;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 15 | ;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 16 | ;; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 17 | ;; COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 | ;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 | ;; BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 | ;; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 21 | ;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 | ;; LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 23 | ;; ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 24 | ;; POSSIBILITY OF SUCH DAMAGE. 25 | 26 | (defmodule chat_ws_handler 27 | (export (init 2) (websocket_handle 3) (websocket_info 3))) 28 | 29 | ;; Internal state. 30 | (defrecord state (opts ())) 31 | 32 | (defun init (req opts) 33 | (chat_server:new_user) ;A new user 34 | `#(cowboy_websocket ,req ,(make-state opts opts))) 35 | 36 | ;; Callback on received websocket data. 37 | 38 | (defun websocket_handle 39 | ([`#(text ,data) req st] 40 | (lfe_io:format "ws text: ~p\n" (list data)) 41 | (case data 42 | ((binary "msg ! " (msg binary)) 43 | (chat_server:send_message msg) 44 | `#(ok ,req ,st)) 45 | ((binary "nick ! " (nick binary)) 46 | (chat_server:set_nick nick) 47 | `#(ok ,req ,st)) 48 | (_ 49 | `#(reply #(text ("status ! received '" ,data "'")) ,req ,st)))) 50 | ([other req st] 51 | (lfe_io:format "ws other: ~p\n" (list other)) 52 | `#(ok ,req ,st))) 53 | 54 | ;; Callback on message from erlang. 55 | 56 | (defun websocket_info 57 | ([(= `#(text #(message ,msg)) data) req st] 58 | (lfe_io:format "cs text: ~p\n" (list data)) 59 | `#(reply #(text ("output ! " ,msg)) ,req ,st)) 60 | ([other req st] 61 | (lfe_io:format "cs other: ~p\n" (list other)) 62 | `#(ok ,req ,st))) 63 | --------------------------------------------------------------------------------