gwvplib/gwvpgitcontrol.php

   1 <?php
   2
   3 $CALL_ME_FUNCTIONS["gitcontrol"] = "gwvp_gitControlCallMe";
   4
   5 //$MENU_ITEMS["20repos"]["text"] = "Repo Admin";
   6 //$MENU_ITEMS["20repos"]["link"] = "$BASE_URL/admin/repos";
   7 $HOME_PAGE_PROVIDERS["gitlog"] = "gwvp_GitLogProvider";
   8
   9 function gwvp_gitControlCallMe()
  10 {
  11         if(isset($_REQUEST["q"])) {
  12                 $query = $_REQUEST["q"];
  13                 $qspl = explode("/", $query);
  14                 if(isset($qspl[0])) {
  15                         if($qspl[0] == "git") {
  16                                 return "gwvp_gitBackendInterface";
  17                         }
  18                 }
  19                 else return false;
  20         }
  21
  22         return false;
  23
  24 }
  25
  26 function gwvp_GitLogProvider()
  27 {
  28         echo "<br>gitload provider loaded on homepage<br>";
  29 }
  30
  31 function gwvp_repoPermissionCheck($repo, $user)
  32 {
  33         return true;
  34 }
  35
  36 function gwvp_gitBackendInterface()
  37 {
  38         // and this is where i re-code the git backend interface from scratch
  39         global $BASE_URL;
  40
  41         $repo_base = gwvp_getConfigVal("repodir");
  42
  43         // TODO: we need to stop passing the repo name around as "repo.git", it needs to be just "repo"
  44
  45         $repo = "";
  46         $repoid = false;
  47         $newloc = "/";
  48         if(isset($_REQUEST["q"])) {
  49                 $query = $_REQUEST["q"];
  50                 $qspl = explode("/", $query);
  51                 // TODO do this with
  52                 $repo = preg_replace("/\.git$/", "", $qspl[1]);
  53                 $repoid = gwvp_GetRepoId($repo);
  54                 for($i=2; $i < count($qspl); $i++) {
  55                         $newloc .= "/".$qspl[$i];
  56                 }
  57         }
  58
  59         if($repoid == false) {
  60                 gwvp_fourZeroFour();
  61                 return;
  62         }
  63
  64         // we do an update server cause its weird and i cant figure out when it actually needs to happen
  65         chdir("$repo_base/$repo.git");
  66         exec("/usr/bin/git update-server-info");
  67
  68
  69         // so now we have the repo
  70         // next we determine if this is a read or a write
  71         $write = false;
  72         if(isset($_REQUEST["service"])) {
  73                 if($_REQUEST["service"] == "git-receive-pack") {
  74                         $write = true;
  75                 }
  76         }
  77         if($_SERVER["REQUEST_METHOD"] == "POST") {
  78                 $write = true;
  79         }
  80
  81         // if its a write, we push for authentication
  82         if($write) {
  83                 $person = gwvp_checkBasicAuthLogin();
  84                 if($person == false) {
  85                         gwvp_AskForBasicAuth();
  86                         return;
  87                 } else {
  88                         error_log("checking perms for $person against $repoid");
  89                         $perms = gwvp_resolvRepoPerms(gwvp_getUserId($person), $repoid);
  90                         if($perms < 3) {
  91                                 gwvp_fourZeroThree();
  92                                 return;
  93                         } else {
  94                                 // here we pass to the git backend
  95                                 error_log("perms are $perms and im allowed");
  96                                 gwvp_callGitBackend($person["username"], $repo);
  97                         }
  98                 }
  99                 return;
 100         }
 101
 102         // if not we figure out the anon permissions for a repo
 103         $perms = gwvp_resolvRepoPerms(-1, $repoid);
 104
 105         // if they're less then read, we need to then check the user auth permissions
 106         if($perms < 2) {
 107                 // we ask for auth
 108                 $person = gwvp_checkBasicAuthLogin();
 109                 if($person == false) {
 110                         gwvp_AskForBasicAuth();
 111                         return;
 112                 } else {
 113                         $perms = gwvp_resolvRepoPerms(gwvp_getUserId($person), $repoid);
 114                         if($perms < 3) {
 115                                 $dump = print_r($person, true);
 116                                 error_log("in basic read, called 403 for $perms $dump");
 117                                 gwvp_fourZeroThree();
 118                                 return;
 119                         }
 120                 }
 121         }
 122
 123         // if we made it this far, we a read and we have permissions to do so, just search the file from the repo
 124         if(file_exists("$repo_base/$repo.git/$newloc")) {
 125                 error_log("would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc");
 126                 $fh = fopen("$repo_base/$repo.git/$newloc", "rb");
 127
 128                 error_log("pushing file");
 129                 while(!feof($fh)) {
 130                         echo fread($fh, 8192);
 131                 }
 132         } else {
 133                 //echo "would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc, NE";
 134                 gwvp_fourZeroFour();
 135                 return;
 136         }
 137
 138 }
 139
 140
 141 function gwvp_gitBackendInterface_old()
 142 {
 143         global $BASE_URL;
 144
 145         $repo_base = gwvp_getConfigVal("repodir");
 146
 147         $repo = "";
 148         $newloc = "/";
 149         if(isset($_REQUEST["q"])) {
 150                 $query = $_REQUEST["q"];
 151                 $qspl = explode("/", $query);
 152                 $repo = $qspl[1];
 153                 for($i=2; $i < count($qspl); $i++) {
 154                         $newloc .= "/".$qspl[$i];
 155                 }
 156         }
 157
 158         $actual_repo_name = preg_replace("/\.git$/", "", $repo);
 159
 160         $user = gwvp_checkBasicAuthLogin();
 161
 162         if(!$user) {
 163                 error_log("User is set to false, so its anonymouse");
 164         } else {
 165                 error_log("user is $user");
 166         }
 167
 168         // must remember that $user of false is anonymous when we code gwvp_repoPerm'sCheck()
 169         if(!gwvp_repoPermissionCheck($actual_repo_name, $user)) {
 170                 error_log("perms check fails - start auth");
 171                 if(isset($_SERVER["PHP_AUTH_USER"])) {
 172                         error_log("have auth - push 403");
 173                         gwvp_fourZeroThree();
 174                 } else {
 175                         error_log("push auth");
 176                         gwvp_AskForBasicAuth();
 177                         return;
 178                 }
 179         }
 180
 181         // we need to quite a bit of parsing in here. The "repo" will always be /git/repo.git
 182         // but if we get here from a browser, we need to forward back to a normal repo viewer
 183         // the only way i can think of doing this is to check the useragent for the word "git"
 184
 185         /*
 186          * here we need to
 187          * 1) figure out the repo its acessing
 188          * 2) figure out the perms on the repo
 189          * 3) determine if its a pull or a push
 190          * - if its a pull, we just serve straight from the fs
 191          * - if its a push, we go thru git-http-backend
 192          * 4) if it requiers auth, we push to auth
 193          *
 194          */
 195         $agent = "git-unknown";
 196         $isgitagent = false;
 197
 198         // tested the user agent bit with jgit from eclipse and normal git... seems to work
 199         if(isset($_SERVER["HTTP_USER_AGENT"])) {
 200                 $agent = $_SERVER["HTTP_USER_AGENT"];
 201                 error_log("in git backend with user agent $agent");
 202                 if(stristr($agent, "git")!==false) {
 203                         $isgitagent = true;
 204                 }
 205         }
 206
 207
 208
 209         /* dont need this code right now
 210         if($isgitagent) echo "GIT: i am a git backened interface for a repo $repo, agent $agent";
 211         else echo "NOT GIT: i am a git backened interface for a repo $repo, agent $agent";
 212         */
 213
 214         // now we need to rebuild the actual request or do we?
 215         //$basegit = "$BASE_URL/git/something.git";
 216         //$newloc = preg_replace("/^$basegit/", "", $_SERVER["REQUEST_URI"]);
 217         chdir("$repo_base/$repo");
 218         exec("/usr/bin/git update-server-info");
 219
 220         if($_SERVER["REQUEST_METHOD"] == "POST") {
 221                         gwvp_AskForBasicAuth();
 222                         gwvp_callGitBackend($repo);
 223                         return;
 224         }
 225
 226         if(isset($_REQUEST["service"])) {
 227                 if($_REQUEST["service"] == "git-receive-pack") {
 228                         // we are a write call - we need auth and we're going to the backend proper
 229                         gwvp_AskForBasicAuth();
 230                         gwvp_callGitBackend($repo);
 231                         return;
 232                 }
 233         }
 234
 235
 236         if(file_exists("$repo_base/$repo/$newloc")) {
 237                 error_log("would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc");
 238                 $fh = fopen("$repo_base/$repo/$newloc", "rb");
 239
 240                 error_log("pushing file");
 241                 while(!feof($fh)) {
 242                         echo fread($fh, 8192);
 243                 }
 244         } else {
 245                 echo "would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc, NE";
 246                 header('HTTP/1.0 404 No Such Thing');
 247                 return;
 248         }
 249 }
 250
 251 function gwvp_canManageRepo($userid, $repoid)
 252 {
 253         // only the owner or an admin can do these tasks
 254         error_log("Checking repoid, $repoid against userid $userid");
 255
 256         if(gwvp_IsUserAdmin(null, null, $userid)) return true;
 257         if(gwvp_IsRepoOwner($userid, $repoid)) return true;
 258         return false;
 259 }
 260
 261 function gwvp_callGitBackend($username, $repo)
 262 {
 263         // this is where things become a nightmare
 264                 $fh   = fopen('php://input', "r");
 265
 266                 $ruri = $_SERVER["REQUEST_URI"];
 267                 $strrem = "git/$repo.git";
 268                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 269                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 270
 271
 272
 273                 $rmeth = $_SERVER["REQUEST_METHOD"];
 274
 275                 $qs = "";
 276                 foreach($_REQUEST as $key => $var) {
 277                         if($key != "q") {
 278                                 //error_log("adding, $var from $key");
 279                                 if($qs == "") $qs.="$key=$var";
 280                                 else $qs.="&$key=$var";
 281                         }
 282                 }
 283
 284                 //sleep(2);
 285
 286
 287
 288                 // this is where the fun, it ends.
 289                 $myoutput = "";
 290                 unset($myoutput);
 291
 292                 // this be nasty!
 293
 294                 // setup env
 295                 if(isset($procenv))     unset($procenv);
 296                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 297                 $procenv["PATH_TRANSLATED"] = "/tmp/$repo.git/$euri";
 298                 $procenv["REQUEST_METHOD"] = "$rmeth";
 299                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 300                 $procenv["QUERY_STRING"] = "$qs";
 301                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 302                 $procenv["REMOTE_USER"] = "$username";
 303                 $procenv["REMOTE_ADDR"] = "1.2.3.4";
 304                 $procenv["AUTH_TYPE"] = "Basic";
 305
 306                 if(isset($_SERVER["CONTENT_TYPE"])) {
 307                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 308                 } else {
 309                         //$procenv["CONTENT_TYPE"] = "";
 310                 }
 311                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 312                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 313                 }
 314
 315                 error_log("path trans'd is /tmp/$repo.git/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 316
 317
 318
 319
 320                 $pwd = "/tmp/";
 321
 322                 $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);
 323
 324                 $untilblank = false;
 325                 while(!$untilblank&&!feof($pipes[1])) {
 326                         $lines_t = fgets($pipes[1]);
 327                         $lines = trim($lines_t);
 328                         error_log("got line: $lines");
 329                         if($lines_t == "\r\n") {
 330                                 $untilblank = true;
 331                                 error_log("now blank");
 332                         } else header($lines);
 333                         if($lines === false) {
 334                                 error_log("got an unexpexted exit...");
 335                                 exit(0);
 336                         }
 337
 338                 }
 339
 340
 341                 $firstline = true;
 342                 $continue = true;
 343
 344                 if(!stream_set_blocking($fh,0)) {
 345                         error_log("cant set input non-blocking");
 346                 }
 347
 348                 if(!stream_set_blocking($pipes[1],0)) {
 349                         error_log("cant set pipe1 non-blocking");
 350                 }
 351
 352                 // i was going to use stream_select, but i feel this works better like this
 353                 while($continue) {
 354                         // do client
 355                         if(!feof($fh)) {
 356                                 $from_client_data = fread($fh,8192);
 357                                 if($from_client_data !== false) fwrite($pipes[0], $from_client_data);
 358                                 fflush($pipes[0]);
 359                                 //fwrite($fl, $from_client_data);
 360                                 $client_len = strlen($from_client_data);
 361                         } else {
 362                                 error_log("client end");
 363                                 $client_len = 0;
 364                         }
 365
 366                         // do cgi
 367                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 368                         // but i do know that the fgets for the headers above should have comsued that
 369                         if(!feof($pipes[1])) {
 370                                 $from_cgi_data_t = fread($pipes[1],8192);
 371                                 $from_cgi_data = $from_cgi_data_t;
 372
 373                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 374                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 375                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 376                                 if($firstline) {
 377                                         if(strlen($from_cgi_data_t)>0) {
 378                                                 // i dont get why this happens, and its very frustrating.. im not sure if its a bug in php
 379                                                 // or something the git-http-backend thing is doing..
 380                                                 // TODO: find out why this happens
 381                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 382                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 383                                                         error_log("MOOOKS - we did trunc");
 384                                                 } else {
 385                                                         error_log("MOOOKS - we did not trunc");
 386                                                 }
 387                                                 $firstline = false;
 388                                         }
 389                                 }
 390
 391                                 if($from_cgi_data !== false) {
 392                                         echo $from_cgi_data;
 393                                         flush();
 394                                 }
 395                                 $cgi_len = strlen($from_cgi_data);
 396                         } else {
 397                                 error_log("cgi end");
 398                                 $cgi_len = 0;
 399                         }
 400
 401                         if(feof($pipes[1])) $continue = false;
 402                         else {
 403                                 if($client_len == 0 && $cgi_len == 0) {
 404                                         usleep(200000);
 405                                         error_log("sleep tick");
 406                                 } else {
 407                                         error_log("sizes: $client_len, $cgi_len");
 408                                         if($cgi_len > 0) {
 409                                                 error_log("from cgi: \"$from_cgi_data\"");
 410                                         }
 411                                 }
 412                         }
 413
 414                 }
 415
 416
 417                 //fclose($fl);
 418                 fclose($fh);
 419                 fclose($pipes[1]);
 420                 fclose($pipes[0]);
 421 }
 422
 423
 424
 425 function gwvp_repoExists($name)
 426 {
 427         $repo_base = gwvp_getConfigVal("repodir");
 428
 429         if(file_exists("$repo_base/$name.git")) return true;
 430         else return false;
 431 }
 432
 433 // default perms:
 434 // 0 - anyone can clone/read, only owner can write
 435 // 1 - noone can clone/read, repo is visible (i.e. name), only owner can read/write repo
 436 // 2 - only owner can see anything
 437 function gwvp_createGitRepo($name, $ownerid, $desc, $bundle=null, $defaultperms=0)
 438 {
 439         $repo_base = gwvp_getConfigVal("repodir");
 440
 441         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 442         if($bundle == null) {
 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         } else {
 448                 error_log("create via mirror on $repo_base/$name.git");
 449                 exec("/usr/bin/git clone --mirror $bundle $repo_base/$name.git > /tmp/gitlog 2>&1");
 450                 chdir("$repo_base/$name.git");
 451                 exec("/usr/bin/git update-server-info");
 452         }
 453
 454         // gwvp_AddRepo($reponame, $repodesc, $repoowner, $defaultperms = 0)
 455         gwvp_AddRepo($name, $desc, $ownerid, $defaultperms);
 456
 457         return true;
 458 }
 459
 460 // this funciton returns one of three things, read, visible, write, none
 461 // as
 462 // 0 - none
 463 // 1 - visible
 464 // 2 - read
 465 // 3 - write
 466 function gwvp_resolvRepoPerms($userid, $repoid)
 467 {
 468         $ownerid = gwvp_getRepoOwner($repoid);
 469         $isadmin = gwvp_IsUserAdmin(null, null, $userid);
 470
 471         if($isadmin) return 3;
 472
 473         if($userid == $ownerid) return 3;
 474
 475         // now we load the perms table and pray
 476         $repoperms = gwvp_getRepoPermissions($repoid);
 477         $usergroups = gwvp_getGroupsForUser(null, $userid);
 478
 479         $maxperm = 0;
 480         if($repoperms != false) foreach($repoperms as $perm) {
 481                 // need to go thru each perm, then check it agains the user we're trying to figure
 482                 // the perms on
 483                 switch($perm["type"]) {
 484                         case "read":
 485                                 $permval = 2;
 486                                 break;
 487                         case "visible":
 488                                 $permval = 1;
 489                                 break;
 490                         case "write":
 491                                 $permval = 3;
 492                                 break;
 493                         default:
 494                                 $permval = 0;
 495                 }
 496
 497                 // we only var if permval is greater then current
 498                 if($permval > $maxperm) {
 499                         //error_log("going into check for $maxperm/$permval, ".$perm["ref"]);
 500                         if($perm["ref"] == "anon") {
 501                                 $maxperm = $permval;
 502                         } else if($perm["ref"] == "authed") {
 503                                 $maxperm = $permval;
 504                         } else {
 505                                 // now we do splits
 506                                 $spl = explode(":", $perm["ref"]);
 507                                 $idtype = $spl[0];
 508                                 $idval = $spl[1];
 509                                 if($idtype == "group") {
 510                                         // function gwvp_IsGroupMember($email, $groupname)
 511                                         if(gwvp_IsGroupMemberById($userid, $idval)) $maxperm = $permval;
 512                                 } else if ($idtype == "user") {
 513                                         //error_log("checking $userid, $idval");
 514                                         if($userid == $idval) $maxperm = $permval;
 515                                 }
 516                         }
 517                 }
 518         }
 519
 520         // thats TOTALLY going to work... -_0 we should really write a unit test for this, but thats a bit
 521         // hard given the db req's so for now, we'll leave it as is
 522         return $maxperm;
 523 }
 524
 525 ?>