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 = -1;
  47         $newloc = "/";
  48         if(isset($_REQUEST["q"])) {
  49                 $query = $_REQUEST["q"];
  50                 $qspl = explode("/", $query);
  51                 $repo = $qspl[1];
  52                 $repoid = gwvp_resolvRepoPerms($repo);
  53                 for($i=2; $i < count($qspl); $i++) {
  54                         $newloc .= "/".$qspl[$i];
  55                 }
  56         }
  57
  58         if($repoid == -1) {
  59                 gwvp_fourZeroFour();
  60                 return;
  61         }
  62
  63         // so now we have the repo
  64         // next we determine if this is a read or a write
  65         $write = false;
  66         if(isset($_REQUEST["service"])) {
  67                 if($_REQUEST["service"] == "git-receive-pack") {
  68                         $write = true;
  69                 }
  70         }
  71         if($_SERVER["REQUEST_METHOD"] == "POST") {
  72                 $write = true;
  73         }
  74
  75         // if its a write, we push for authentication
  76         if($write) {
  77                 $person = gwvp_checkBasicAuthLogin();
  78                 if($person == false) {
  79                         gwvp_AskForBasicAuth();
  80                         return;
  81                 } else {
  82                         $perms = gwvp_resolvRepoPerms($person["id"], $repoid);
  83                         if($perms < 3) {
  84                                 gwvp_fourZeroThree();
  85                                 return;
  86                         } else {
  87                                 // here we pass to the git backend
  88                                 gwvp_callGitBackend($person["username"], $repo);
  89                         }
  90                 }
  91                 return;
  92         }
  93
  94         // if not we figure out the anon permissions for a repo
  95         $perms = gwvp_resolvRepoPerms(-1, $repoid);
  96
  97         // if they're less then read, we need to then check the user auth permissions
  98         if($perms < 2) {
  99                 // we ask for auth
 100                 $person = gwvp_checkBasicAuthLogin();
 101                 if($person == false) {
 102                         gwvp_AskForBasicAuth();
 103                         return;
 104                 } else {
 105                         $perms = gwvp_resolvRepoPerms($person["id"], $repoid);
 106                         if($perms < 3) {
 107                                 gwvp_fourZeroThree();
 108                                 return;
 109                         }
 110                 }
 111         }
 112
 113         // if we made it this far, we a read and we have permissions to do so, just search the file from the repo
 114         if(file_exists("$repo_base/$repo/$newloc")) {
 115                 error_log("would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc");
 116                 $fh = fopen("$repo_base/$repo/$newloc", "rb");
 117
 118                 error_log("pushing file");
 119                 while(!feof($fh)) {
 120                         echo fread($fh, 8192);
 121                 }
 122         } else {
 123                 //echo "would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc, NE";
 124                 gwvp_fourZeroFour();
 125                 return;
 126         }
 127
 128 }
 129
 130
 131 function gwvp_gitBackendInterface_old()
 132 {
 133         global $BASE_URL;
 134
 135         $repo_base = gwvp_getConfigVal("repodir");
 136
 137         $repo = "";
 138         $newloc = "/";
 139         if(isset($_REQUEST["q"])) {
 140                 $query = $_REQUEST["q"];
 141                 $qspl = explode("/", $query);
 142                 $repo = $qspl[1];
 143                 for($i=2; $i < count($qspl); $i++) {
 144                         $newloc .= "/".$qspl[$i];
 145                 }
 146         }
 147
 148         $actual_repo_name = preg_replace("/\.git$/", "", $repo);
 149
 150         $user = gwvp_checkBasicAuthLogin();
 151
 152         if(!$user) {
 153                 error_log("User is set to false, so its anonymouse");
 154         } else {
 155                 error_log("user is $user");
 156         }
 157
 158         // must remember that $user of false is anonymous when we code gwvp_repoPerm'sCheck()
 159         if(!gwvp_repoPermissionCheck($actual_repo_name, $user)) {
 160                 error_log("perms check fails - start auth");
 161                 if(isset($_SERVER["PHP_AUTH_USER"])) {
 162                         error_log("have auth - push 403");
 163                         gwvp_fourZeroThree();
 164                 } else {
 165                         error_log("push auth");
 166                         gwvp_AskForBasicAuth();
 167                         return;
 168                 }
 169         }
 170
 171         // we need to quite a bit of parsing in here. The "repo" will always be /git/repo.git
 172         // but if we get here from a browser, we need to forward back to a normal repo viewer
 173         // the only way i can think of doing this is to check the useragent for the word "git"
 174
 175         /*
 176          * here we need to
 177          * 1) figure out the repo its acessing
 178          * 2) figure out the perms on the repo
 179          * 3) determine if its a pull or a push
 180          * - if its a pull, we just serve straight from the fs
 181          * - if its a push, we go thru git-http-backend
 182          * 4) if it requiers auth, we push to auth
 183          *
 184          */
 185         $agent = "git-unknown";
 186         $isgitagent = false;
 187
 188         // tested the user agent bit with jgit from eclipse and normal git... seems to work
 189         if(isset($_SERVER["HTTP_USER_AGENT"])) {
 190                 $agent = $_SERVER["HTTP_USER_AGENT"];
 191                 error_log("in git backend with user agent $agent");
 192                 if(stristr($agent, "git")!==false) {
 193                         $isgitagent = true;
 194                 }
 195         }
 196
 197
 198
 199         /* dont need this code right now
 200         if($isgitagent) echo "GIT: i am a git backened interface for a repo $repo, agent $agent";
 201         else echo "NOT GIT: i am a git backened interface for a repo $repo, agent $agent";
 202         */
 203
 204         // now we need to rebuild the actual request or do we?
 205         //$basegit = "$BASE_URL/git/something.git";
 206         //$newloc = preg_replace("/^$basegit/", "", $_SERVER["REQUEST_URI"]);
 207         chdir("$repo_base/$repo");
 208         exec("/usr/bin/git update-server-info");
 209
 210         if($_SERVER["REQUEST_METHOD"] == "POST") {
 211                         gwvp_AskForBasicAuth();
 212                         gwvp_callGitBackend($repo);
 213                         return;
 214         }
 215
 216         if(isset($_REQUEST["service"])) {
 217                 if($_REQUEST["service"] == "git-receive-pack") {
 218                         // we are a write call - we need auth and we're going to the backend proper
 219                         gwvp_AskForBasicAuth();
 220                         gwvp_callGitBackend($repo);
 221                         return;
 222                 }
 223         }
 224
 225
 226         if(file_exists("$repo_base/$repo/$newloc")) {
 227                 error_log("would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc");
 228                 $fh = fopen("$repo_base/$repo/$newloc", "rb");
 229
 230                 error_log("pushing file");
 231                 while(!feof($fh)) {
 232                         echo fread($fh, 8192);
 233                 }
 234         } else {
 235                 echo "would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc, NE";
 236                 header('HTTP/1.0 404 No Such Thing');
 237                 return;
 238         }
 239 }
 240
 241 function gwvp_canManageRepo($userid, $repoid)
 242 {
 243         // only the owner or an admin can do these tasks
 244         error_log("Checking repoid, $repoid against userid $userid");
 245
 246         if(gwvp_IsUserAdmin(null, null, $userid)) return true;
 247         if(gwvp_IsRepoOwner($userid, $repoid)) return true;
 248         return false;
 249 }
 250
 251 function gwvp_callGitBackend($username, $reponame)
 252 {
 253         // this is where things become a nightmare
 254                 $fh   = fopen('php://input', "r");
 255
 256                 $ruri = $_SERVER["REQUEST_URI"];
 257                 $strrem = "git/$repo";
 258                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 259                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 260
 261
 262
 263                 $rmeth = $_SERVER["REQUEST_METHOD"];
 264
 265                 $qs = "";
 266                 foreach($_REQUEST as $key => $var) {
 267                         if($key != "q") {
 268                                 //error_log("adding, $var from $key");
 269                                 if($qs == "") $qs.="$key=$var";
 270                                 else $qs.="&$key=$var";
 271                         }
 272                 }
 273
 274                 //sleep(2);
 275
 276
 277
 278                 // this is where the fun, it ends.
 279                 $myoutput = "";
 280                 unset($myoutput);
 281
 282                 // this be nasty!
 283
 284                 // setup env
 285                 if(isset($procenv))     unset($procenv);
 286                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 287                 $procenv["PATH_TRANSLATED"] = "/tmp/$repo/$euri";
 288                 $procenv["REQUEST_METHOD"] = "$rmeth";
 289                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 290                 $procenv["QUERY_STRING"] = "$qs";
 291                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 292                 $procenv["REMOTE_USER"] = "$username";
 293                 $procenv["REMOTE_ADDR"] = "1.2.3.4";
 294                 $procenv["AUTH_TYPE"] = "Basic";
 295
 296                 if(isset($_SERVER["CONTENT_TYPE"])) {
 297                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 298                 } else {
 299                         //$procenv["CONTENT_TYPE"] = "";
 300                 }
 301                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 302                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 303                 }
 304
 305                 error_log("path trans'd is /tmp/$repo/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 306
 307
 308
 309
 310                 $pwd = "/tmp/";
 311
 312                 $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);
 313
 314                 $untilblank = false;
 315                 while(!$untilblank&&!feof($pipes[1])) {
 316                         $lines_t = fgets($pipes[1]);
 317                         $lines = trim($lines_t);
 318                         error_log("got line: $lines");
 319                         if($lines_t == "\r\n") {
 320                                 $untilblank = true;
 321                                 error_log("now blank");
 322                         } else header($lines);
 323                         if($lines === false) {
 324                                 error_log("got an unexpexted exit...");
 325                                 exit(0);
 326                         }
 327
 328                 }
 329
 330
 331                 $firstline = true;
 332                 $continue = true;
 333
 334                 if(!stream_set_blocking($fh,0)) {
 335                         error_log("cant set input non-blocking");
 336                 }
 337
 338                 if(!stream_set_blocking($pipes[1],0)) {
 339                         error_log("cant set pipe1 non-blocking");
 340                 }
 341
 342                 // i was going to use stream_select, but i feel this works better like this
 343                 while($continue) {
 344                         // do client
 345                         if(!feof($fh)) {
 346                                 $from_client_data = fread($fh,8192);
 347                                 if($from_client_data !== false) fwrite($pipes[0], $from_client_data);
 348                                 fflush($pipes[0]);
 349                                 //fwrite($fl, $from_client_data);
 350                                 $client_len = strlen($from_client_data);
 351                         } else {
 352                                 error_log("client end");
 353                                 $client_len = 0;
 354                         }
 355
 356                         // do cgi
 357                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 358                         // but i do know that the fgets for the headers above should have comsued that
 359                         if(!feof($pipes[1])) {
 360                                 $from_cgi_data_t = fread($pipes[1],8192);
 361                                 $from_cgi_data = $from_cgi_data_t;
 362
 363                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 364                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 365                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 366                                 if($firstline) {
 367                                         if(strlen($from_cgi_data_t)>0) {
 368                                                 // i dont get why this happens, and its very frustrating.. im not sure if its a bug in php
 369                                                 // or something the git-http-backend thing is doing..
 370                                                 // TODO: find out why this happens
 371                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 372                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 373                                                         error_log("MOOOKS - we did trunc");
 374                                                 } else {
 375                                                         error_log("MOOOKS - we did not trunc");
 376                                                 }
 377                                                 $firstline = false;
 378                                         }
 379                                 }
 380
 381                                 if($from_cgi_data !== false) {
 382                                         echo $from_cgi_data;
 383                                         flush();
 384                                 }
 385                                 $cgi_len = strlen($from_cgi_data);
 386                         } else {
 387                                 error_log("cgi end");
 388                                 $cgi_len = 0;
 389                         }
 390
 391                         if(feof($pipes[1])) $continue = false;
 392                         else {
 393                                 if($client_len == 0 && $cgi_len == 0) {
 394                                         usleep(200000);
 395                                         error_log("sleep tick");
 396                                 } else {
 397                                         error_log("sizes: $client_len, $cgi_len");
 398                                         if($cgi_len > 0) {
 399                                                 error_log("from cgi: \"$from_cgi_data\"");
 400                                         }
 401                                 }
 402                         }
 403
 404                 }
 405
 406
 407                 //fclose($fl);
 408                 fclose($fh);
 409                 fclose($pipes[1]);
 410                 fclose($pipes[0]);
 411 }
 412
 413
 414
 415 function gwvp_repoExists($name)
 416 {
 417         $repo_base = gwvp_getConfigVal("repodir");
 418
 419         if(file_exists("$repo_base/$name.git")) return true;
 420         else return false;
 421 }
 422
 423 // default perms:
 424 // 0 - anyone can clone/read, only owner can write
 425 // 1 - noone can clone/read, repo is visible (i.e. name), only owner can read/write repo
 426 // 2 - only owner can see anything
 427 function gwvp_createGitRepo($name, $ownerid, $desc, $bundle=null, $defaultperms=0)
 428 {
 429         $repo_base = gwvp_getConfigVal("repodir");
 430
 431         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 432         if($bundle == null) {
 433                 error_log("would create $repo_base/$name.git");
 434                 exec("/usr/bin/git init $repo_base/$name.git --bare > /tmp/gitlog 2>&1");
 435                 chdir("$repo_base/$name.git");
 436                 exec("/usr/bin/git update-server-info");
 437         } else {
 438                 error_log("create via mirror on $repo_base/$name.git");
 439                 exec("/usr/bin/git clone --mirror $bundle $repo_base/$name.git > /tmp/gitlog 2>&1");
 440                 chdir("$repo_base/$name.git");
 441                 exec("/usr/bin/git update-server-info");
 442         }
 443
 444         // gwvp_AddRepo($reponame, $repodesc, $repoowner, $defaultperms = 0)
 445         gwvp_AddRepo($name, $desc, $ownerid, $defaultperms);
 446
 447         return true;
 448 }
 449
 450 // this funciton returns one of three things, read, visible, write, none
 451 // as
 452 // 0 - none
 453 // 1 - visible
 454 // 2 - read
 455 // 3 - write
 456 function gwvp_resolvRepoPerms($userid, $repoid)
 457 {
 458         $ownerid = gwvp_getRepoOwner($repoid);
 459         $isadmin = gwvp_IsUserAdmin(null, null, $userid);
 460
 461         if($isadmin) return 3;
 462
 463         if($userid == $ownerid) return 3;
 464
 465         // now we load the perms table and pray
 466         $repoperms = gwvp_getRepoPermissions($repoid);
 467         $usergroups = gwvp_getGroupsForUser(null, $userid);
 468
 469         $maxperm = 0;
 470         if($repoperms != false) foreach($repoperms as $perm) {
 471                 // need to go thru each perm, then check it agains the user we're trying to figure
 472                 // the perms on
 473                 switch($perm["type"]) {
 474                         case "read":
 475                                 $permval = 2;
 476                                 break;
 477                         case "visible":
 478                                 $permval = 1;
 479                                 break;
 480                         case "write":
 481                                 $permval = 3;
 482                                 break;
 483                         default:
 484                                 $permval = 0;
 485                 }
 486
 487                 // we only var if permval is greater then current
 488                 if($permval > $maxperm) {
 489                         //error_log("going into check for $maxperm/$permval, ".$perm["ref"]);
 490                         if($perm["ref"] == "anon") {
 491                                 $maxperm = $permval;
 492                         } else if($perm["ref"] == "authed") {
 493                                 $maxperm = $permval;
 494                         } else {
 495                                 // now we do splits
 496                                 $spl = explode(":", $perm["ref"]);
 497                                 $idtype = $spl[0];
 498                                 $idval = $spl[1];
 499                                 if($idtype == "group") {
 500                                         // function gwvp_IsGroupMember($email, $groupname)
 501                                         if(gwvp_IsGroupMemberById($userid, $idval)) $maxperm = $permval;
 502                                 } else if ($idtype == "user") {
 503                                         //error_log("checking $userid, $idval");
 504                                         if($userid == $idval) $maxperm = $permval;
 505                                 }
 506                         }
 507                 }
 508         }
 509
 510         // thats TOTALLY going to work... -_0 we should really write a unit test for this, but thats a bit
 511         // hard given the db req's so for now, we'll leave it as is
 512         return $maxperm;
 513 }
 514
 515 ?>