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         exec("/usr/bin/git update-server-info");
 111
 112         if(!file_exists("$repo_base/$repo.git/hooks/pre-receive") || !file_exists("$repo_base/$repo.git/hooks/update")) {
 113                 // error_log("WRITING HOOKS");
 114                 gwvpmini_CreateRepoHooks("$repo_base/$repo.git", $cmd_line_tool, $repo);
 115         }
 116
 117
 118         // so now we have the repo
 119         // next we determine if this is a read or a write
 120
 121         // TODO: WE NEED TO FIX THIS, IT DOESNT ALWAYS DETECT a "WRITE"
 122         $write = false;
 123         if(isset($_REQUEST["service"])) {
 124                 if($_REQUEST["service"] == "git-receive-pack") {
 125                         // error_log("got write as receivepack in post");
 126                         $write = true;
 127                 }
 128         }
 129         if(preg_match("/.*git-receive-pack$/", $_REQUEST["q"])) $write = true;
 130         //$write = true;
 131         // 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
 132         // no, this isnt a solution cause auth'd read attempts will come up as writes...
 133         //if(isset($_SERVER["PHP_AUTH_USER"])) {
 134                 //$write = true;
 135         //}
 136
 137
 138         $person = gwvpmini_checkBasicAuthLogin();
 139         //$write = true;
 140         // next, figure out permissions for repo
 141         $rid = gwvpmini_GetRepoId($repo);
 142         $uid = -1;
 143         // error_log("AT THIS POINT WE HAVE $uid, $rid, $repo $person");
 144
 145         if(!$person) {
 146                 if($write) {
 147                         // error_log("ASK FOR BASIC AUTH");
 148                         gwvpmini_AskForBasicAuth();
 149                         return;
 150                 } else {
 151                         $perm = gwvpmini_GetRepoPerm($rid, "a");
 152                         if($perm < 1) {
 153                                 // error_log("ASK FOR BASIC AUTH 2");
 154                                 gwvpmini_AskForBasicAuth();
 155                                 return;
 156                         }
 157                 }
 158         } else {
 159                 $uid = gwvpmini_GetUserId($person);
 160                 $perm = gwvpmini_GetRepoPerm($rid, $uid);
 161                 if($write) {
 162                         if($perm < 2) {
 163                                 // error_log("SEND FOFF");
 164                                 gwvpmini_fourZeroThree();
 165                                 return;
 166                         }
 167                 } else {
 168                         if($perm < 1) {
 169                                 gwvpmini_fourZeroThree();
 170                                 return;
 171                         }
 172                 }
 173         }
 174
 175         // if its a write, we push for authentication
 176
 177         //if($write) {
 178         if(!$person) {
 179                 $person = "anonymous";
 180         }
 181
 182         // if its a write, we check (before and after) the branch/tag info to see if they were updated
 183         if($write) {
 184                 error_log("REQUESTINBACKEND: processed as write");
 185         } else {
 186                 error_log("REQUESTINBACKEND: processed as read");
 187         }
 188
 189         gwvpmini_callGitBackend($person, $repo);
 190
 191         //if($write) {
 192                 //}
 193         return;
 194         //}
 195
 196         // if we made it this far, we a read and we have permissions to do so, just search the file from the repo
 197         /*if(file_exists("$repo_base/$repo.git/$newloc")) {
 198                 // error_log("would ask $repo for $repo.git/$newloc from $repo_base/$repo.git/$newloc");
 199                 $fh = fopen("$repo_base/$repo.git/$newloc", "rb");
 200
 201                 // error_log("pushing file");
 202                 while(!feof($fh)) {
 203                         echo fread($fh, 8192);
 204                 }
 205         } else {
 206                 // error_log("would ask $repo for $repo/$newloc from $repo_base/$repo/$newloc, NE");
 207                 gwvpmini_fourZeroFour();
 208                 return;
 209         }*/
 210
 211 }
 212
 213 function gwvpmini_canManageRepo($userid, $repoid)
 214 {
 215         // only the owner or an admin can do these tasks
 216         // error_log("Checking repoid, $repoid against userid $userid");
 217
 218         if(gwvpmini_IsUserAdmin(null, null, $userid)) return true;
 219         if(gwvpmini_IsRepoOwner($userid, $repoid)) return true;
 220         return false;
 221 }
 222
 223 function gwvpmini_callGitBackend($username, $repo)
 224 {
 225         // this is where things become a nightmare
 226                 $fh   = fopen('php://input', "r");
 227
 228                 $repo_base = gwvpmini_getConfigVal("repodir");\r
 229
 230
 231                 $ruri = $_SERVER["REQUEST_URI"];
 232                 $strrem = "git/$repo.git";
 233                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 234                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 235
 236
 237
 238                 $rmeth = $_SERVER["REQUEST_METHOD"];
 239
 240                 $qs = "";
 241                 foreach($_REQUEST as $key => $var) {
 242                         if($key != "q") {
 243                                 //// error_log("adding, $var from $key");
 244                                 if($qs == "") $qs.="$key=$var";
 245                                 else $qs.="&$key=$var";
 246                         }
 247                 }
 248
 249                 //sleep(2);
 250
 251                 $userdets = gwvpmini_getUser($username);
 252
 253                 // this is where the fun, it ends.
 254                 $myoutput = "";
 255                 unset($myoutput);
 256
 257                 // this be nasty!
 258
 259                 // setup env
 260                 if(isset($procenv))     unset($procenv);
 261                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 262                 $procenv["PATH_TRANSLATED"] = "/$repo_base/$repo.git/$euri";
 263                 $procenv["REQUEST_METHOD"] = "$rmeth";
 264                 $procenv["GIT_COMMITTER_NAME"] = $userdets["fullname"];
 265                 $procenv["GIT_COMMITTER_EMAIL"] = $userdets["email"];
 266                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 267                 $procenv["QUERY_STRING"] = "$qs";
 268                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 269                 $procenv["REMOTE_USER"] = "$username";
 270                 $procenv["REMOTE_ADDR"] = $_SERVER["REMOTE_ADDR"];
 271                 $procenv["AUTH_TYPE"] = "Basic";
 272
 273                 //// error_log("PROCENV: ".print_r($procenv,true));
 274
 275                 if(isset($_SERVER["CONTENT_TYPE"])) {
 276                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 277                 } else {
 278                         //$procenv["CONTENT_TYPE"] = "";
 279                 }
 280                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 281                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 282                 }
 283
 284                 // error_log("path trans'd is /$repo_base/$repo.git/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 285
 286
 287
 288
 289                 $pwd = "/$repo_base/";
 290
 291                 $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);
 292
 293                 $untilblank = false;
 294                 while(!$untilblank&&!feof($pipes[1])) {
 295                         $lines_t = fgets($pipes[1]);
 296                         $lines = trim($lines_t);
 297                         // error_log("got line: $lines");
 298                         if($lines_t == "\r\n") {
 299                                 $untilblank = true;
 300                                 // error_log("now blank");
 301                         } else header($lines);
 302                         if($lines === false) {
 303                                 // error_log("got an unexpexted exit...");
 304                                 exit(0);
 305                         }
 306
 307                 }
 308
 309
 310                 $firstline = true;
 311                 $continue = true;
 312
 313                 if(!stream_set_blocking($fh,0)) {
 314                         // error_log("cant set input non-blocking");
 315                 }
 316
 317                 if(!stream_set_blocking($pipes[1],0)) {
 318                         // error_log("cant set pipe1 non-blocking");
 319                 }
 320
 321
 322                 $stlimit = 0;
 323                 $fp = fopen("/tmp/gitup.".rand(0,4000000), "w");
 324                 // i was going to use stream_select, but i feel this works better like this
 325                 while($continue) {
 326                         // do client
 327                         if(!feof($fh)) {
 328                                 $from_client_data = fread($fh,8192);
 329                                 if($from_client_data !== false) {
 330                                         fwrite($pipes[0], $from_client_data);
 331                                         fwrite($fp, $from_client_data);
 332                                 }
 333                                 fflush($pipes[0]);
 334                                 //fwrite($fl, $from_client_data);
 335                                 $client_len = strlen($from_client_data);
 336                         } else {
 337                                 // error_log("client end");
 338                                 $client_len = 0;
 339                                 //$continue = false;
 340                         }
 341
 342                         // do cgi
 343                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 344                         // but i do know that the fgets for the headers above should have comsued that
 345                         if(!feof($pipes[1])) {
 346                                 $from_cgi_data_t = fread($pipes[1],8192);
 347                                 $from_cgi_data = $from_cgi_data_t;
 348
 349                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 350                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 351                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 352                                 if($firstline) {
 353                                         if(strlen($from_cgi_data_t)>0) {
 354                                                 // i dont get why this happens, and its very frustrating.. im not sure if its a bug in php
 355                                                 // or something the git-http-backend thing is doing..
 356                                                 // TODO: find out why this happens
 357                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 358                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 359                                                         // error_log("MOOOKS - we did trunc");
 360                                                 } else {
 361                                                         // error_log("MOOOKS - we did not trunc");
 362                                                 }
 363                                                 $firstline = false;
 364                                         }
 365                                 }
 366
 367                                 if($from_cgi_data !== false) {
 368                                         echo $from_cgi_data;
 369                                         flush();
 370                                 }
 371                                 $cgi_len = strlen($from_cgi_data);
 372                         } else {
 373                                 // error_log("cgi end");
 374                                 $cgi_len = 0;
 375                         }
 376
 377                         if(feof($pipes[1])) $continue = false;
 378                         else {
 379                                 if($client_len == 0 && $cgi_len == 0) {
 380                                         usleep(200000);
 381                                         // error_log("sleep tick");
 382                                         $stlimit++;
 383                                         if($stlimit > 2) $continue = false;
 384                                 } else {
 385                                         $stlimit = 0;
 386                                         // error_log("sizes: $client_len, $cgi_len");
 387                                         if($cgi_len > 0) {
 388                                                 // error_log("from cgi: \"$from_cgi_data\"");
 389                                         }
 390                                 }
 391                         }
 392
 393                 }
 394
 395
 396                 //fclose($fl);
 397                 fclose($fh);
 398                 fclose($pipes[1]);
 399                 fclose($pipes[0]);
 400 }
 401
 402
 403
 404 function gwvpmini_repoExists($name)
 405 {
 406         $repo_base = gwvpmini_getConfigVal("repodir");
 407
 408         if(file_exists("$repo_base/$name.git")) return true;
 409         else return false;
 410 }
 411
 412 // default perms:
 413 // 0 - anyone can clone/read, only owner can write
 414 // 1 - noone can clone/read, repo is visible (i.e. name), only owner can read/write repo
 415 // 2 - only owner can see anything
 416 function gwvpmini_createGitRepo($name, $ownerid, $desc)
 417 {
 418         $repo_base = gwvpmini_getConfigVal("repodir");
 419
 420         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 421         // error_log("would create $repo_base/$name.git");
 422         exec("/usr/bin/git init $repo_base/$name.git --bare > /tmp/gitlog 2>&1");
 423         chdir("$repo_base/$name.git");
 424         exec("/usr/bin/git update-server-info");
 425
 426         // gwvpmini_AddRepo($reponame, $repodesc, $repoowner, $defaultperms = 0)
 427         gwvpmini_AddRepo($name, $desc, $ownerid);
 428
 429         return true;
 430 }
 431
 432
 433 ?>