web/Obj/sac-a-push.phh

   1 <?php
   2
   3 /*
   4  *  brisk - spush/sac-a-push.phh
   5  *
   6  *  Copyright (C) 2012 Matteo Nastasi
   7  *                          mailto: nastasi@alternativeoutput.it
   8  *                                  matteo.nastasi@milug.org
   9  *                          web: http://www.alternativeoutput.it
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABLILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19  * General Public License for more details. You should have received a
  20  * copy of the GNU General Public License along with this program; if
  21  * not, write to the Free Software Foundation, Inc, 59 Temple Place -
  22  * Suite 330, Boston, MA 02111-1307, USA.
  23  *
  24  */
  25
  26 define('SITE_PREFIX', '/brisk/');
  27 define('SITE_PREFIX_LEN', 7);
  28
  29 function spu_process_info($stream_info, $method, &$header, &$get, &$post, &$cookie)
  30 {
  31     $check_post = FALSE;
  32     $header = array();
  33     $get = array();
  34     $post = array();
  35     foreach(preg_split("/(\r?\n)/", $stream_info) as $line) {
  36         // printf("LINE: [%s]\n", $line);
  37         if ($check_post) {
  38             if (!isset($header['The-Request'])) {
  39                 return FALSE;
  40             }
  41             $req = explode(" ", $header['The-Request']);
  42             $method = $req[0];
  43
  44             if (isset($header['Cookie'])) {
  45                 $cookies = explode(";", $header['Cookie']);
  46                 for ($i = 0 ; $i < count($cookies) ; $i++) {
  47                     $nameval = explode("=", trim($cookies[$i]));
  48                     if (count($nameval) != 2) {
  49                         printf("WARNING: malformat cookie element [%s]\n", $cookies[$i]);
  50                         continue;
  51                     }
  52                     $cookie[$nameval[0]] = urldecode($nameval[1]);
  53                 }
  54             }
  55             // GET params management
  56             $get_vars = explode('?', $req[1], 2);
  57             $path =   $get_vars[0];
  58             if (count($get_vars) > 1) {
  59                 $a = explode('&', $get_vars[1]);
  60                 printf("A COUNT: [%s] %d\n", $a[0], count($a));
  61                 for ($i = 0 ; $i < count($a) ; $i++) {
  62                     $b = explode('=', $a[$i]);
  63                     $get[$b[0]] = urldecode($b[1]);
  64                 }
  65             }
  66             // POST params management
  67             if ($req[0] == 'POST') {
  68                 if ($header['Content-Type'] != 'application/x-www-form-urlencoded'
  69                     || !isset($header['Content-Length'])) {
  70                     return FALSE;
  71                 }
  72                 $post_len = mb_strlen($line, "latin1");
  73                 $a = explode('&', $line);
  74                 for ($i = 0 ; $i < count($a) ; $i++) {
  75                     $b = explode('=', $a[$i]);
  76                     $post[$b[0]] = urldecode($b[1]);
  77                 }
  78                 printf("INFO: postlen: %d\n", $post_len);
  79             }
  80             break;
  81         }
  82         if ($line == "") {
  83             $check_post = TRUE;
  84             continue;
  85         }
  86         $split = explode(":", $line, 2);
  87         $header[$split[0]] = $split[1];
  88     }
  89     return $path;
  90 }
  91
  92 function gpcs_var($name, $get, $post, $cookie)
  93 {
  94     if (isset($GLOBALS[$name]))
  95         return FALSE;
  96     else if (isset($cookie[$name]))
  97         return ($cookie[$name]);
  98     else if (isset($post[$name]))
  99         return ($post[$name]);
 100     else if (isset($get[$name]))
 101         return ($get[$name]);
 102
 103     return FALSE;
 104 }
 105
 106 function headers_render($header, $len)
 107 {
 108     $s = "";
 109     if (isset($header['Location'])) {
 110         return sprintf("HTTP/1.1 302 OK\r\nLocation: %s\r\n\r\n", $header['Location']);
 111     }
 112     else {
 113         $s .= "HTTP/1.1 200 OK\r\n";
 114     }
 115     if (!isset($header['Date']))
 116         $s .= sprintf("Date: %s\r\n", date(DATE_RFC822));
 117     if (!isset($header['Connection']))
 118         $s .= "Connection: close\r\n";
 119     if (!isset($header['Content-Type']))
 120         $s .= "Content-Type: text/html\r\n";
 121     foreach($header as $key => $value) {
 122         $s .= sprintf("%s: %s\r\n", $key, $value);
 123     }
 124     if ($len >= 0) {
 125         $s .= sprintf("Content-Length: %d\r\n", $len);
 126     }
 127     else {
 128         $s .= "Cache-Control: no-cache, must-revalidate\r\n";
 129         $s .= "Expires: Mon, 26 Jul 1997 05:00:00 GMT\r\n";
 130         if (!isset($header['Content-Encoding'])) {
 131             $s .= "Content-Encoding: chunked\r\n";
 132         }
 133         $s .= "Transfer-Encoding: chunked\r\n";
 134     }
 135     $s .= "\r\n";
 136
 137     return ($s);
 138 }
 139
 140 /*
 141  *  Caching system using ob php system to cache old style pages
 142  *  to a var and than send it with more calm
 143  */
 144
 145 function shutta()
 146 {
 147   log_rd2("SHUTTA [".connection_status()."] !");
 148 }
 149
 150 register_shutdown_function('shutta');
 151
 152 /*
 153  *  MAIN
 154  */
 155
 156 function chunked_content($zls, $content)
 157 {
 158     if ($zls) {
 159         $cont_comp = $zls->compress_chunk($content);
 160     }
 161     else {
 162         $cont_comp = $content;
 163     }
 164     $cont_comp_l = mb_strlen($cont_comp, "ASCII");
 165     printf("CHUNK: [%s]\n", $content);
 166
 167     return (sprintf("%X\r\n", $cont_comp_l).$cont_comp."\r\n");
 168 }
 169
 170 function chunked_fini()
 171 {
 172     return sprintf("0\r\n");
 173 }
 174
 175 function get_encoding($header)
 176 {
 177     $enc = "plain";
 178     if (isset($header['Accept-Encoding'])) {
 179         $acc = explode(',', $header['Accept-Encoding']);
 180
 181         if (array_search('gzip', $acc) !== FALSE) {
 182             $enc = 'gzip';
 183         }
 184         else if (array_search('deflate', $acc) !== FALSE) {
 185             $enc = 'deflate';
 186         }
 187     }
 188
 189     return ($enc);
 190 }
 191
 192
 193 class Sac_a_push {
 194     static $fixed_fd = 2;
 195
 196     var $file_socket;
 197     var $unix_socket;
 198     var $socks;
 199     var $s2u;
 200     var $pages_flush;
 201
 202     var $list;
 203     var $in;
 204
 205     var $debug;
 206     var $blocking_mode;
 207
 208     var $app;
 209     var $bin5;
 210
 211     var $curtime;
 212
 213     var $rndstr;
 214     var $main_loop;
 215
 216     function Sac_a_push()
 217     {
 218     }
 219
 220     // Sac_a_push::create("/tmp/brisk.sock", 0, 0
 221
 222     static function create(&$app, $sockname, $debug, $blocking_mode)
 223     {
 224         $thiz = new Sac_a_push();
 225
 226         $thiz->app = $app;
 227         $thiz->file_socket = $sockname;
 228         $thiz->unix_socket = "unix://$sockname";
 229         $thiz->debug = $debug;
 230         $thiz->socks = array();
 231         $thiz->s2u  = array();
 232         $thiz->pages_flush = array();
 233
 234         $thiz->blocking_mode = 0; // 0 for non-blocking
 235
 236         $thiz->rndstr = "";
 237         for ($i = 0 ; $i < 4096 ; $i++) {
 238             if (($i % 128) == 0)
 239                 $thiz->rndstr .= "\n";
 240             else
 241                 $thiz->rndstr .= chr(mt_rand(65, 90));
 242         }
 243
 244         if (file_exists($thiz->file_socket)) {
 245             unlink($thiz->file_socket);
 246         }
 247
 248         $old_umask = umask(0);
 249         if (($thiz->list = stream_socket_server($thiz->unix_socket, $err, $errs)) === FALSE) {
 250             return (FALSE);
 251         }
 252         umask($old_umask);
 253         stream_set_blocking($thiz->list, $thiz->blocking_mode); # Set the stream to non-blocking
 254
 255         if (($thiz->in = fopen("php://stdin", "r")) === FALSE) {
 256             return(FALSE);
 257         }
 258
 259         $thiz->main_loop = FALSE;
 260
 261         return ($thiz);
 262     }
 263
 264     function socks_set($sock, $user)
 265     {
 266         $id = intval($sock);
 267
 268         $this->s2u[$id]   = $user;
 269         $this->socks[$id] = $sock;
 270     }
 271
 272     function socks_unset($sock)
 273     {
 274         $id = intval($sock);
 275
 276         unset($this->s2u[$id]);
 277         unset($this->socks[$id]);
 278     }
 279
 280     function pgflush_try_add($enc, &$new_socket, $tout, $header_out, $content)
 281     {
 282         $pgflush = new PageFlush($new_socket, $enc, $this->curtime, $tout, $header_out, $content);
 283
 284         if ($pgflush->try_flush($this->curtime) == FALSE) {
 285             // Add $pgflush to the pgflush array
 286             $this->pgflush_add($pgflush);
 287         }
 288     }
 289
 290     function pgflush_add($pgflush)
 291     {
 292         array_push($this->pages_flush, $pgflush);
 293     }
 294
 295     function garbage_manager($force)
 296     {
 297         $this->app->garbage_manager($force);
 298
 299         foreach ($this->socks as $k => $sock) {
 300             if ($this->s2u[intval($sock)]->sess == '') {
 301                 if ($this->s2u[intval($sock)]->rd_socket_get() != NULL) {
 302                     $this->s2u[intval($sock)]->rd_socket_set(NULL);
 303                 }
 304                 unset($this->socks[intval($sock)]);
 305                 unset($this->s2u[intval($sock)]);
 306                 fclose($sock);
 307                 printf("CLOSE ON GARBAGE MANAGER\n");
 308             }
 309         }
 310     }
 311
 312     function run()
 313     {
 314         if ($this->main_loop) {
 315             return (FALSE);
 316         }
 317
 318         $this->main_loop = TRUE;
 319
 320         while ($this->main_loop) {
 321             $this->curtime = time();
 322             printf("IN LOOP: Current opened: %d  pages_flush: %d - ", count($this->socks), count($this->pages_flush));
 323
 324             /* Prepare the read array */
 325             /* // when we manage it ... */
 326             /* if ($shutdown)  */
 327             /*     $read   = array_merge(array("$in" => $in), $socks); */
 328             /* else */
 329             $read   = array_merge(array(intval($this->list) => $this->list, intval($this->in) => $this->in),
 330                                   $this->socks);
 331
 332             if ($this->debug > 1) {
 333                 printf("PRE_SELECT\n");
 334                 print_r($read);
 335             }
 336             $write  = NULL;
 337             $except = NULL;
 338             $num_changed_sockets = stream_select($read, $write, $except, 0, 500000);
 339
 340             if ($num_changed_sockets == 0) {
 341                 printf(" no data in 5 secs ");
 342             }
 343             else if ($num_changed_sockets > 0) {
 344                 printf("num sock %d num_of_socket: %d\n", $num_changed_sockets, count($read));
 345                 if ($this->debug > 1) {
 346                     print_r($read);
 347                 }
 348                 /* At least at one of the sockets something interesting happened */
 349                 foreach ($read as $i => $sock) {
 350                     /* is_resource check is required because there is the possibility that
 351                        during new request an old connection is closed */
 352                     if (!is_resource($sock)) {
 353                         continue;
 354                     }
 355                     if ($sock === $this->list) {
 356                         printf("NUOVA CONNEX\n");
 357                         if (($new_unix = stream_socket_accept($this->list)) == FALSE) {
 358                             printf("SOCKET_ACCEPT FAILED\n");
 359                             continue;
 360                         }
 361                         $stream_info = "";
 362                         $method      = "";
 363                         $get         = array();
 364                         $post        = array();
 365                         $cookie      = array();
 366                         if (($new_socket = ancillary_getstream($new_unix, $stream_info)) !== FALSE) {
 367                             printf("NEW_SOCKET: %d\n", intval($new_socket));
 368                             stream_set_blocking($new_socket, $this->blocking_mode); // Set the stream to non-blocking
 369                             printf("RECEIVED HEADER:\n%s", $stream_info);
 370                             $path = spu_process_info($stream_info, $method, $header, $get, $post, $cookie);
 371                             printf("PATH: [%s]\n", $path);
 372                             printf("M: %s\nHEADER:\n", $method);
 373                             print_r($header);
 374                             printf("GET:\n");
 375                             print_r($get);
 376                             printf("POST:\n");
 377                             print_r($post);
 378                             printf("COOKIE:\n");
 379                             print_r($cookie);
 380
 381                             $addr = stream_socket_get_name($new_socket, TRUE);
 382                             $header_out = array();
 383
 384                             $enc = get_encoding($header);
 385
 386                             $subs = SITE_PREFIX."briskin5/";
 387                             $subs_l = strlen($subs);
 388                             $rret = FALSE;
 389                             if (!strncmp($path, SITE_PREFIX, SITE_PREFIX_LEN)) {
 390                                 $rret = $this->app->request_mgr($this, $enc, $header_out, $new_socket, substr($path, SITE_PREFIX_LEN), $addr, $get, $post, $cookie);
 391                             }
 392                             if ($rret == FALSE) {
 393                                 // FIXME: manage 404 !!!
 394                                 printf("TODO: fix unknown page\n");
 395                             }
 396                             printf("number of sockets after %d\n", count($this->socks));
 397                         }
 398                         else {
 399                             printf("WARNING: ancillary_getstream failed\n");
 400                         }
 401                     }
 402                     else {
 403                         $buf = fread($sock, 512);
 404                         if ($buf == FALSE || strlen($buf) == 0) {
 405                             if ($buf == FALSE) {
 406                                 printf("ERROR READING\n");
 407                             }
 408                             if ($sock === $this->list) {
 409                                 printf("Arrivati %d bytes da list\n", strlen($buf));
 410                                 exit(21);
 411                             }
 412                             else if ($sock === $this->in) {
 413                                 printf("Arrivati %d bytes da stdin\n", strlen($buf));
 414                                 exit(22);
 415                             }
 416                             else {
 417                                 // $user_a[$s2u[intval($sock)]]->disable();
 418                                 if ($this->s2u[intval($sock)]->rd_socket_get() != NULL) {
 419                                     $this->s2u[intval($sock)]->rd_socket_set(NULL);
 420                                 }
 421                                 unset($this->socks[intval($sock)]);
 422                                 unset($this->s2u[intval($sock)]);
 423                             }
 424                             fclose($sock);
 425                             printf("CLOSE ON READ\n");
 426
 427                             if ($this->debug > 1) {
 428                                 printf("post unset\n");
 429                                 print_r($this->socks);
 430                             }
 431                         }
 432                         else {
 433                             if ($this->debug > 1) {
 434                                 print_r($read);
 435                             }
 436                             if ($sock === $this->list) {
 437                                 printf("Arrivati %d bytes da list\n", strlen($buf));
 438                             }
 439                             else if ($sock === $this->in) {
 440                                 printf("Arrivati %d bytes da stdin\n", strlen($buf));
 441                             }
 442                             else {
 443                                 $key = array_search("$sock", $this->socks);
 444                                 printf("Arrivati %d bytes dalla socket n. %d\n", strlen($buf), $key);
 445                             }
 446                         }
 447                     }
 448                 }
 449             }
 450
 451             $this->garbage_manager(FALSE);
 452
 453             /* manage unfinished pages */
 454             foreach ($this->pages_flush as $k => $pgflush) {
 455                 if ($pgflush->try_flush($this->curtime) == TRUE) {
 456                     unset($this->pages_flush[$k]);
 457                 }
 458             }
 459
 460             /*
 461                $response:                        raw stream data not sent
 462                $content:                         html consistent data (<script bla bla>)
 463                $user->stream_keepalive($w_ping)  ping srv->cli OR srv->cli + cli->srv if $w_ping == TRUE
 464             */
 465
 466             /* manage open streaming */
 467             foreach ($this->socks as $k => $sock) {
 468                 if (isset($this->s2u[intval($sock)])) {
 469                     $user = $this->s2u[intval($sock)];
 470                     $response = $user->rd_cache_get();
 471                     $do_ping = FALSE;
 472                     if (($this->curtime - $user->lacc) > (EXPIRE_TIME_RD / 3)) {
 473                         $do_ping = TRUE;
 474                     }
 475                     else {
 476                         $user->ping_req = FALSE;
 477                     }
 478
 479                     if ($response == "") {
 480                         $content = "";
 481                         $user->stream_main($content, $get, $post, $cookie);
 482                         printf("[%s] [%d] [%d]\n", $user->name, $user->lacc, $this->curtime);
 483                         if ($do_ping && $user->ping_req == FALSE) {
 484                             $content .= $user->stream_keepalive(TRUE);
 485                             $user->ping_req = TRUE;
 486                         }
 487                         else if ($content == "" && $user->rd_kalive_is_expired($this->curtime)) {
 488                             $content = $user->stream_keepalive(FALSE);
 489                         }
 490                         if ($content != "") {
 491                             $response = chunked_content($user->rd_zls_get(), $content);
 492                         }
 493                     }
 494
 495                     if ($response != "") {
 496                         // echo "SPIA: [".substr($response, 0, 60)."...]\n";
 497                         echo "SPIA: [".$response."]\n";
 498                         $response_l = mb_strlen($response, "ASCII");
 499                         $wret = @fwrite($sock, $response);
 500                         if ($wret < $response_l) {
 501                             printf("TROUBLE WITH FWRITE: %d\n", $wret);
 502                             $user->rd_cache_set(mb_substr($response, $wret, $response_l - $wret, "ASCII"));
 503                         }
 504                         else {
 505                             $user->rd_cache_set("");
 506                         }
 507                         fflush($sock);
 508                         $user->rd_kalive_reset($this->curtime);
 509                     }
 510
 511                     // close socket after a while to prevent client memory consumption
 512                     if ($user->rd_endtime_is_expired($this->curtime)) {
 513                         if ($this->s2u[intval($sock)]->rd_socket_get() != NULL) {
 514                             $this->s2u[intval($sock)]->rd_socket_set(NULL);
 515                         }
 516                         unset($this->socks[intval($sock)]);
 517                         unset($this->s2u[intval($sock)]);
 518                         fclose($sock);
 519                         printf("CLOSE ON LOOP\n");
 520                     }
 521                 }
 522             }  // foreach ($this->socks...
 523             printf("\n");
 524         }  // while (...
 525     }  // function run(...
 526 }
 527
 528 ?>