gwvpmini/gwvpmini_gitbackend.php

   1 <?php
   2
   3 $CALL_ME_FUNCTIONS["gitcontrol"] = "gwvpmini_gitControlCallMe";
   4
   5 //$MENU_ITEMS["20repos"]["text"] = "Repo Admin";
   6 //$MENU_ITEMS["20repos"]["link"] = "$BASE_URL/admin/repos";
   7
   8 // TODO: we could actually change backend interface such that is
   9 // will respond to any url's that contain "repo.git" rather then
  10 // having to be $BASE_URL/git/repo.git
  11 function gwvpmini_gitControlCallMe()
  12 {
  13         if(isset($_REQUEST["q"])) {
  14                 $query = $_REQUEST["q"];
  15                 $qspl = explode("/", $query);
  16                 if(isset($qspl[0])) {
  17                         if($qspl[0] == "git") {
  18                                 return "gwvpmini_gitBackendInterface";
  19                         }
  20                 }
  21                 else return false;
  22         }
  23
  24         return false;
  25
  26 }
  27
  28
  29 function gwvpmini_CreateRepoHooks($repopath, $cmdpath, $reponame)
  30 {
  31         $fp = fopen("$repopath/hooks/pre-receive", "w");
  32
  33         if(!$fp) error_log("could not create pre-receive hook");
  34
  35         // TODO: think about this one
  36         //$script = '#!/bin/bash'."\n\n".'DCOMMIT=`cat`'."\n".'START=`echo $DCOMMIT|cut -d " " -f 1`'."\n".'END=`echo $DCOMMIT|cut -d " " -f 2`'."\n".'REF=`echo $DCOMMIT|cut -d " " -f 3`'."\n\n";
  37         $script = "#!/bin/bash\n\nDCOMMIT=".'`cat`'."\n\nphp $cmdpath $reponame \$REMOTE_USER pre-receive \$DCOMMIT\n\n";
  38         fwrite($fp, $script);
  39
  40         fclose($fp);
  41
  42         chmod("$repopath/hooks/pre-receive", 0755);
  43
  44
  45         $fp = fopen("$repopath/hooks/update", "w");
  46
  47         if(!$fp) error_log("could not create update hook");
  48
  49         // TODO: think about this one
  50         unset($script);
  51         $script = "#!/bin/bash\n\nphp $cmdpath $reponame \$REMOTE_USER update \$1 \$2 \$3\n\n";
  52         fwrite($fp, $script);
  53
  54         fclose($fp);
  55
  56         chmod("$repopath/hooks/update", 0755);
  57 }
  58
  59 function gwvpmini_gitBackendInterface()
  60 {
  61         // and this is where i re-code the git backend interface from scratch
  62         global $BASE_URL, $cmd_line_tool;
  63
  64         header_remove("Pragma");\r
  65         header_remove("Cache-Control");\r
  66         header_remove("Set-Cookie");\r
  67         header_remove("Expires");\r
  68         header_remove("X-Powered-By");\r
  69         header_remove("Vary");\r
  70
  71
  72         $repo_base = gwvpmini_getConfigVal("repodir");
  73
  74         // TODO: we need to stop passing the repo name around as "repo.git", it needs to be just "repo"
  75
  76
  77         /* bizare git problem that ignores 403's or continues on with a push despite them
  78         // error_log("FLAP for ".$_SERVER["REQUEST_URI"]);
  79         if(isset($_REQUEST)) {
  80                 $dump = print_r($_REQUEST, true);
  81                 // error_log("FLAP, $dump");
  82         }
  83         if(isset($_SERVER["PHP_AUTH_USER"])) {
  84                 // error_log("FLAP: donut hole");
  85         }*/
  86
  87         error_log("REQUESTINBACKEND: ".print_r($_REQUEST, true));
  88
  89         $repo = "";
  90         $repoid = false;
  91         $newloc = "/";
  92         if(isset($_REQUEST["q"])) {
  93                 $query = $_REQUEST["q"];
  94                 $qspl = explode("/", $query);
  95                 // TODO do this with
  96                 $repo = preg_replace("/\.git$/", "", $qspl[1]);
  97                 $repoid = gwvpmini_GetRepoId($repo);
  98                 for($i=2; $i < count($qspl); $i++) {
  99                         $newloc .= "/".$qspl[$i];
 100                 }
 101         }
 102
 103         if($repoid == false) {
 104                 gwvpmini_fourZeroFour();
 105                 return;
 106         }
 107
 108         // we do an update server cause its weird and i cant figure out when it actually needs to happen
 109         chdir("$repo_base/$repo.git");
 110         // dont believe i have to do this
 111         //exec("/usr/bin/git update-server-info");
 112
 113         if(!file_exists("$repo_base/$repo.git/hooks/pre-receive") || !file_exists("$repo_base/$repo.git/hooks/update")) {
 114                 // error_log("WRITING HOOKS");
 115                 gwvpmini_CreateRepoHooks("$repo_base/$repo.git", $cmd_line_tool, $repo);
 116         }
 117
 118
 119         // so now we have the repo
 120         // next we determine if this is a read or a write
 121
 122         // TODO: WE NEED TO FIX THIS, IT DOESNT ALWAYS DETECT a "WRITE"
 123         $write = false;
 124         if(isset($_REQUEST["service"])) {
 125                 if($_REQUEST["service"] == "git-receive-pack") {
 126                         // error_log("got write as receivepack in post");
 127                         $write = true;
 128                 }
 129         }
 130         if(preg_match("/.*git-receive-pack$/", $_REQUEST["q"])) $write = true;
 131         //$write = true;
 132         // THIS MAY CAUSE ISSUES LATER ON but we do it cause the git client ignores our 403 when it uses git-receive-pack after an auth
 133         // no, this isnt a solution cause auth'd read attempts will come up as writes...
 134         //if(isset($_SERVER["PHP_AUTH_USER"])) {
 135                 //$write = true;
 136         //}
 137
 138
 139         $person = gwvpmini_checkBasicAuthLogin();
 140         //$write = true;
 141         // next, figure out permissions for repo
 142         $rid = gwvpmini_GetRepoId($repo);
 143         $uid = -1;
 144         // error_log("AT THIS POINT WE HAVE $uid, $rid, $repo $person");
 145
 146         if(!$person) {
 147                 if($write) {
 148                         // error_log("ASK FOR BASIC AUTH");
 149                         gwvpmini_AskForBasicAuth();
 150                         return;
 151                 } else {
 152                         $perm = gwvpmini_GetRepoPerm($rid, "a");
 153                         if($perm < 1) {
 154                                 // error_log("ASK FOR BASIC AUTH 2");
 155                                 gwvpmini_AskForBasicAuth();
 156                                 return;
 157                         }
 158                 }
 159         } else {
 160                 $uid = gwvpmini_GetUserId($person);
 161                 $perm = gwvpmini_GetRepoPerm($rid, $uid);
 162                 if($write) {
 163                         if($perm < 2) {
 164                                 // error_log("SEND FOFF");
 165                                 gwvpmini_fourZeroThree();
 166                                 return;
 167                         }
 168                 } else {
 169                         if($perm < 1) {
 170                                 gwvpmini_fourZeroThree();
 171                                 return;
 172                         }
 173                 }
 174         }
 175
 176         // if its a write, we push for authentication
 177
 178         //if($write) {
 179         if(!$person) {
 180                 $person = "anonymous";
 181         }
 182
 183         // if its a write, we check (before and after) the branch/tag info to see if they were updated
 184         if($write) {
 185                 error_log("REQUESTINBACKEND: processed as write");
 186         } else {
 187                 error_log("REQUESTINBACKEND: processed as read");
 188         }
 189
 190         gwvpmini_callGitBackend($person, $repo);
 191
 192         //if($write) {
 193                 //}
 194         return;
 195         //}
 196
 197         // if we made it this far, we a read and we have permissions to do so, just search the file from the repo
 198         /*if(file_exists("$repo_base/$repo.git/$newloc")) {
 199                 // error_log("would ask $repo for $repo.git/$newloc from $repo_base/$repo.git/$newloc");
 200                 $fh = fopen("$repo_base/$repo.git/$newloc", "rb");
 201
 202                 // error_log("pushing file");
 203                 while(!feof($fh)) {
 204                         echo fread($fh, 8192);
 205                 }
 206         } else {
 207                 // error_log("would ask $repo for $repo/$newloc from $repo_base/$repo/$newloc, NE");
 208                 gwvpmini_fourZeroFour();
 209                 return;
 210         }*/
 211
 212 }
 213
 214 function gwvpmini_canManageRepo($userid, $repoid)
 215 {
 216         // only the owner or an admin can do these tasks
 217         // error_log("Checking repoid, $repoid against userid $userid");
 218
 219         if(gwvpmini_IsUserAdmin(null, null, $userid)) return true;
 220         if(gwvpmini_IsRepoOwner($userid, $repoid)) return true;
 221         return false;
 222 }
 223
 224 function gwvpmini_callGitBackend($username, $repo)
 225 {
 226         // this is where things become a nightmare
 227                 $fh   = fopen('php://input', "r");
 228
 229                 $repo_base = gwvpmini_getConfigVal("repodir");\r
 230
 231
 232                 $ruri = $_SERVER["REQUEST_URI"];
 233                 $strrem = "git/$repo.git";
 234                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 235                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 236
 237
 238
 239                 $rmeth = $_SERVER["REQUEST_METHOD"];
 240
 241                 $qs = "";
 242                 foreach($_REQUEST as $key => $var) {
 243                         if($key != "q") {
 244                                 //// error_log("adding, $var from $key");
 245                                 if($qs == "") $qs.="$key=$var";
 246                                 else $qs.="&$key=$var";
 247                         }
 248                 }
 249
 250                 //sleep(2);
 251
 252                 $userdets = gwvpmini_getUser($username);
 253
 254                 // this is where the fun, it ends.
 255                 $myoutput = "";
 256                 unset($myoutput);
 257
 258                 // this be nasty!
 259
 260                 // setup env
 261                 if(isset($procenv))     unset($procenv);
 262                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 263                 $procenv["PATH_TRANSLATED"] = "/$repo_base/$repo.git/$euri";
 264                 $procenv["REQUEST_METHOD"] = "$rmeth";
 265                 $procenv["GIT_COMMITTER_NAME"] = $userdets["fullname"];
 266                 $procenv["GIT_COMMITTER_EMAIL"] = $userdets["email"];
 267                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 268                 $procenv["QUERY_STRING"] = "$qs";
 269                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 270                 $procenv["REMOTE_USER"] = "$username";
 271                 $procenv["REMOTE_ADDR"] = $_SERVER["REMOTE_ADDR"];
 272                 $procenv["AUTH_TYPE"] = "Basic";
 273
 274                 //// error_log("PROCENV: ".print_r($procenv,true));
 275
 276                 if(isset($_SERVER["CONTENT_TYPE"])) {
 277                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 278                 } else {
 279                         //$procenv["CONTENT_TYPE"] = "";
 280                 }
 281                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 282                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 283                 }
 284
 285                 // error_log("path trans'd is /$repo_base/$repo.git/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 286
 287
 288
 289
 290                 $pwd = "/$repo_base/";
 291
 292                 $proc = proc_open("/usr/lib/git-core/git-http-backend", array(array("pipe","rb"),array("pipe","wb"),array("file","/tmp/err", "a")), $pipes, $pwd, $procenv);
 293
 294                 $untilblank = false;
 295                 while(!$untilblank&&!feof($pipes[1])) {
 296                         $lines_t = fgets($pipes[1]);
 297                         $lines = trim($lines_t);
 298                         // error_log("got line: $lines");
 299                         if($lines_t == "\r\n") {
 300                                 $untilblank = true;
 301                                 // error_log("now blank");
 302                         } else header($lines);
 303                         if($lines === false) {
 304                                 // error_log("got an unexpexted exit...");
 305                                 exit(0);
 306                         }
 307
 308                 }
 309
 310
 311                 $firstline = true;
 312                 $continue = true;
 313
 314                 if(!stream_set_blocking($fh,0)) {
 315                         // error_log("cant set input non-blocking");
 316                 }
 317
 318                 if(!stream_set_blocking($pipes[1],0)) {
 319                         // error_log("cant set pipe1 non-blocking");
 320                 }
 321
 322
 323                 $stlimit = 0;
 324                 $fp = fopen("/tmp/gitup.".rand(0,4000000), "w");
 325                 // i was going to use stream_select, but i feel this works better like this
 326                 while($continue) {
 327                         // do client
 328                         if(!feof($fh)) {
 329                                 $from_client_data = fread($fh,8192);
 330                                 if($from_client_data !== false) {
 331                                         fwrite($pipes[0], $from_client_data);
 332                                         fwrite($fp, $from_client_data);
 333                                 }
 334                                 fflush($pipes[0]);
 335                                 //fwrite($fl, $from_client_data);
 336                                 $client_len = strlen($from_client_data);
 337                         } else {
 338                                 // error_log("client end");
 339                                 $client_len = 0;
 340                                 //$continue = false;
 341                         }
 342
 343                         // do cgi
 344                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 345                         // but i do know that the fgets for the headers above should have comsued that
 346                         if(!feof($pipes[1])) {
 347                                 $from_cgi_data_t = fread($pipes[1],8192);
 348                                 $from_cgi_data = $from_cgi_data_t;
 349
 350                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 351                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 352                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 353                                 if($firstline) {
 354                                         if(strlen($from_cgi_data_t)>0) {
 355                                                 // i dont get why this happens, and its very frustrating.. im not sure if its a bug in php
 356                                                 // or something the git-http-backend thing is doing..
 357                                                 // TODO: find out why this happens
 358                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 359                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 360                                                         // error_log("MOOOKS - we did trunc");
 361                                                 } else {
 362                                                         // error_log("MOOOKS - we did not trunc");
 363                                                 }
 364                                                 $firstline = false;
 365                                         }
 366                                 }
 367
 368                                 if($from_cgi_data !== false) {
 369                                         echo $from_cgi_data;
 370                                         flush();
 371                                 }
 372                                 $cgi_len = strlen($from_cgi_data);
 373                         } else {
 374                                 // error_log("cgi end");
 375                                 $cgi_len = 0;
 376                         }
 377
 378                         if(feof($pipes[1])) $continue = false;
 379                         else {
 380                                 if($client_len == 0 && $cgi_len == 0) {
 381                                         usleep(200000);
 382                                         // error_log("sleep tick");
 383                                         $stlimit++;
 384                                         if($stlimit > 50) $continue = false;
 385                                 } else {
 386                                         $stlimit = 0;
 387                                         // error_log("sizes: $client_len, $cgi_len");
 388                                         if($cgi_len > 0) {
 389                                                 // error_log("from cgi: \"$from_cgi_data\"");
 390                                         }
 391                                 }
 392                         }
 393
 394                 }
 395
 396
 397                 //fclose($fl);
 398                 fclose($fh);
 399                 fclose($pipes[1]);
 400                 fclose($pipes[0]);
 401 }
 402
 403
 404
 405 function gwvpmini_repoExists($name)
 406 {
 407         $repo_base = gwvpmini_getConfigVal("repodir");
 408
 409         if(file_exists("$repo_base/$name.git")) return true;
 410         else return false;
 411 }
 412
 413 // default perms:
 414 // 0 - anyone can clone/read, only owner can write
 415 // 1 - noone can clone/read, repo is visible (i.e. name), only owner can read/write repo
 416 // 2 - only owner can see anything
 417 function gwvpmini_createGitRepo($name, $ownerid, $desc, $defperms, $clonefrom, $isremoteclone)
 418 {
 419         global $cmd_line_tool;
 420
 421         $repo_base = gwvpmini_getConfigVal("repodir");
 422
 423         if($clonefrom !== false) {
 424                 error_log("how did i end up in clonefrom? $clonefrom");
 425                 if(!$isremoteclone) {
 426                         exec("/usr/bin/git clone --bare $repo_base/$clonefrom.git $repo_base/$name.git >> /tmp/gitlog 2>&1");
 427                         gwvpmini_AddRepo($name, $desc, $ownerid, $defperms, $clonefrom);
 428                 } else {
 429                         // we do this from an outside call in the background
 430                         $cmd = "/usr/bin/php $cmd_line_tool $clonefrom $name backgroundclone >> /tmp/gitlog 2>&1 &";
 431                         error_log("cmd called as $cmd");
 432                         exec($cmd);
 433                         gwvpmini_AddRepo($name, $desc, $ownerid, $defperms, $clonefrom);
 434                         $rn = gwvpmini_getRepo(null, $name, null);
 435                         $rid = $rn["id"];
 436                         gwvpmini_SetRepoCloning($rid);
 437                         gwvpmini_SendMessage("info", "Background clone initiated for $name ($rid) from $clonefrom... your repo will be available once the background clone is finished");
 438                         return false;
 439                 }
 440         } else {
 441
 442         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 443         // error_log("would create $repo_base/$name.git");
 444                 exec("/usr/bin/git init $repo_base/$name.git --bare >> /tmp/gitlog 2>&1");
 445                 chdir("$repo_base/$name.git");
 446                 exec("/usr/bin/git update-server-info");
 447
 448                 // gwvpmini_AddRepo($reponame, $repodesc, $repoowner, $defaultperms = 0)
 449                 gwvpmini_AddRepo($name, $desc, $ownerid, $defperms, $clonefrom);
 450         }
 451
 452         return true;
 453 }
 454
 455
 456 ?>