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