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_gitBackendInterface()
  30 {
  31         // and this is where i re-code the git backend interface from scratch
  32         global $BASE_URL;
  33
  34         header_remove("Pragma");\r
  35         header_remove("Cache-Control");\r
  36         header_remove("Set-Cookie");\r
  37         header_remove("Expires");\r
  38         header_remove("X-Powered-By");\r
  39         header_remove("Vary");\r
  40
  41
  42         $repo_base = gwvpmini_getConfigVal("repodir");
  43
  44         // TODO: we need to stop passing the repo name around as "repo.git", it needs to be just "repo"
  45
  46
  47         /* bizare git problem that ignores 403's or continues on with a push despite them
  48         error_log("FLAP for ".$_SERVER["REQUEST_URI"]);
  49         if(isset($_REQUEST)) {
  50                 $dump = print_r($_REQUEST, true);
  51                 error_log("FLAP, $dump");
  52         }
  53         if(isset($_SERVER["PHP_AUTH_USER"])) {
  54                 error_log("FLAP: donut hole");
  55         }*/
  56
  57
  58
  59         $repo = "";
  60         $repoid = false;
  61         $newloc = "/";
  62         if(isset($_REQUEST["q"])) {
  63                 $query = $_REQUEST["q"];
  64                 $qspl = explode("/", $query);
  65                 // TODO do this with
  66                 $repo = preg_replace("/\.git$/", "", $qspl[1]);
  67                 $repoid = gwvpmini_GetRepoId($repo);
  68                 for($i=2; $i < count($qspl); $i++) {
  69                         $newloc .= "/".$qspl[$i];
  70                 }
  71         }
  72
  73         if($repoid == false) {
  74                 gwvpmini_fourZeroFour();
  75                 return;
  76         }
  77
  78         // we do an update server cause its weird and i cant figure out when it actually needs to happen
  79         chdir("$repo_base/$repo.git");
  80         exec("/usr/bin/git update-server-info");
  81
  82
  83         // so now we have the repo
  84         // next we determine if this is a read or a write
  85         $write = false;
  86         if(isset($_REQUEST["service"])) {
  87                 if($_REQUEST["service"] == "git-receive-pack") {
  88                         error_log("got write as receivepack in post");
  89                         $write = true;
  90                 }
  91         }
  92         if($_SERVER["REQUEST_METHOD"] == "POST") {
  93                 $write = true;
  94         }
  95
  96         //$write = true;
  97         // 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
  98         // no, this isnt a solution cause auth'd read attempts will come up as writes...
  99         //if(isset($_SERVER["PHP_AUTH_USER"])) {
 100                 //$write = true;
 101         //}
 102
 103
 104         $person = gwvpmini_checkBasicAuthLogin();
 105         //$write = true;
 106         // next, figure out permissions for repo
 107         $rid = gwvpmini_GetRepoId($repo);
 108         $uid = -1;
 109         error_log("AT THIS POINT WE HAVE $uid, $rid, $repo $person");
 110
 111         if(!$person) {
 112                 if($write) {
 113                         error_log("ASK FOR BASIC AUTH");
 114                         gwvpmini_AskForBasicAuth();
 115                         return;
 116                 } else {
 117                         $perm = gwvpmini_GetRepoPerm($rid, "a");
 118                         if($perm < 1) {
 119                                 error_log("ASK FOR BASIC AUTH 2");
 120                                 gwvpmini_AskForBasicAuth();
 121                                 return;
 122                         }
 123                 }
 124         } else {
 125                 $uid = gwvpmini_GetUserId($person);
 126                 $perm = gwvpmini_GetRepoPerm($rid, $uid);
 127                 if($write) {
 128                         if($perm < 2) {
 129                                 error_log("SEND FOFF");
 130                                 gwvpmini_fourZeroThree();
 131                                 return;
 132                         }
 133                 } else {
 134                         if($perm < 1) {
 135                                 gwvpmini_fourZeroThree();
 136                                 return;
 137                         }
 138                 }
 139         }
 140
 141         // if its a write, we push for authentication
 142         if($write) {
 143                 gwvpmini_callGitBackend($person, $repo);
 144                 return;
 145         }
 146
 147         // if we made it this far, we a read and we have permissions to do so, just search the file from the repo
 148         if(file_exists("$repo_base/$repo.git/$newloc")) {
 149                 error_log("would ask $repo for $repo.git/$newloc from $repo_base/$repo.git/$newloc");
 150                 $fh = fopen("$repo_base/$repo.git/$newloc", "rb");
 151
 152                 error_log("pushing file");
 153                 while(!feof($fh)) {
 154                         echo fread($fh, 8192);
 155                 }
 156         } else {
 157                 error_log("would ask $repo for $repo/$newloc from $repo_base/$repo/$newloc, NE");
 158                 gwvpmini_fourZeroFour();
 159                 return;
 160         }
 161
 162 }
 163
 164 function gwvpmini_canManageRepo($userid, $repoid)
 165 {
 166         // only the owner or an admin can do these tasks
 167         error_log("Checking repoid, $repoid against userid $userid");
 168
 169         if(gwvpmini_IsUserAdmin(null, null, $userid)) return true;
 170         if(gwvpmini_IsRepoOwner($userid, $repoid)) return true;
 171         return false;
 172 }
 173
 174 function gwvpmini_callGitBackend($username, $repo)
 175 {
 176         // this is where things become a nightmare
 177                 $fh   = fopen('php://input', "r");
 178
 179                 $repo_base = gwvpmini_getConfigVal("repodir");\r
 180
 181
 182                 $ruri = $_SERVER["REQUEST_URI"];
 183                 $strrem = "git/$repo.git";
 184                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 185                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 186
 187
 188
 189                 $rmeth = $_SERVER["REQUEST_METHOD"];
 190
 191                 $qs = "";
 192                 foreach($_REQUEST as $key => $var) {
 193                         if($key != "q") {
 194                                 //error_log("adding, $var from $key");
 195                                 if($qs == "") $qs.="$key=$var";
 196                                 else $qs.="&$key=$var";
 197                         }
 198                 }
 199
 200                 //sleep(2);
 201
 202
 203
 204                 // this is where the fun, it ends.
 205                 $myoutput = "";
 206                 unset($myoutput);
 207
 208                 // this be nasty!
 209
 210                 // setup env
 211                 if(isset($procenv))     unset($procenv);
 212                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 213                 $procenv["PATH_TRANSLATED"] = "/$repo_base/$repo.git/$euri";
 214                 $procenv["REQUEST_METHOD"] = "$rmeth";
 215                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 216                 $procenv["QUERY_STRING"] = "$qs";
 217                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 218                 $procenv["REMOTE_USER"] = "$username";
 219                 $procenv["REMOTE_ADDR"] = $_SERVER["REMOTE_ADDR"];
 220                 $procenv["AUTH_TYPE"] = "Basic";
 221
 222                 if(isset($_SERVER["CONTENT_TYPE"])) {
 223                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 224                 } else {
 225                         //$procenv["CONTENT_TYPE"] = "";
 226                 }
 227                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 228                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 229                 }
 230
 231                 error_log("path trans'd is /$repo_base/$repo.git/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 232
 233
 234
 235
 236                 $pwd = "/$repo_base/";
 237
 238                 $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);
 239
 240                 $untilblank = false;
 241                 while(!$untilblank&&!feof($pipes[1])) {
 242                         $lines_t = fgets($pipes[1]);
 243                         $lines = trim($lines_t);
 244                         error_log("got line: $lines");
 245                         if($lines_t == "\r\n") {
 246                                 $untilblank = true;
 247                                 error_log("now blank");
 248                         } else header($lines);
 249                         if($lines === false) {
 250                                 error_log("got an unexpexted exit...");
 251                                 exit(0);
 252                         }
 253
 254                 }
 255
 256
 257                 $firstline = true;
 258                 $continue = true;
 259
 260                 if(!stream_set_blocking($fh,0)) {
 261                         error_log("cant set input non-blocking");
 262                 }
 263
 264                 if(!stream_set_blocking($pipes[1],0)) {
 265                         error_log("cant set pipe1 non-blocking");
 266                 }
 267
 268                 // i was going to use stream_select, but i feel this works better like this
 269                 while($continue) {
 270                         // do client
 271                         if(!feof($fh)) {
 272                                 $from_client_data = fread($fh,8192);
 273                                 if($from_client_data !== false) fwrite($pipes[0], $from_client_data);
 274                                 fflush($pipes[0]);
 275                                 //fwrite($fl, $from_client_data);
 276                                 $client_len = strlen($from_client_data);
 277                         } else {
 278                                 error_log("client end");
 279                                 $client_len = 0;
 280                         }
 281
 282                         // do cgi
 283                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 284                         // but i do know that the fgets for the headers above should have comsued that
 285                         if(!feof($pipes[1])) {
 286                                 $from_cgi_data_t = fread($pipes[1],8192);
 287                                 $from_cgi_data = $from_cgi_data_t;
 288
 289                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 290                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 291                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 292                                 if($firstline) {
 293                                         if(strlen($from_cgi_data_t)>0) {
 294                                                 // i dont get why this happens, and its very frustrating.. im not sure if its a bug in php
 295                                                 // or something the git-http-backend thing is doing..
 296                                                 // TODO: find out why this happens
 297                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 298                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 299                                                         error_log("MOOOKS - we did trunc");
 300                                                 } else {
 301                                                         error_log("MOOOKS - we did not trunc");
 302                                                 }
 303                                                 $firstline = false;
 304                                         }
 305                                 }
 306
 307                                 if($from_cgi_data !== false) {
 308                                         echo $from_cgi_data;
 309                                         flush();
 310                                 }
 311                                 $cgi_len = strlen($from_cgi_data);
 312                         } else {
 313                                 error_log("cgi end");
 314                                 $cgi_len = 0;
 315                         }
 316
 317                         if(feof($pipes[1])) $continue = false;
 318                         else {
 319                                 if($client_len == 0 && $cgi_len == 0) {
 320                                         usleep(200000);
 321                                         error_log("sleep tick");
 322                                 } else {
 323                                         error_log("sizes: $client_len, $cgi_len");
 324                                         if($cgi_len > 0) {
 325                                                 error_log("from cgi: \"$from_cgi_data\"");
 326                                         }
 327                                 }
 328                         }
 329
 330                 }
 331
 332
 333                 //fclose($fl);
 334                 fclose($fh);
 335                 fclose($pipes[1]);
 336                 fclose($pipes[0]);
 337 }
 338
 339
 340
 341 function gwvpmini_repoExists($name)
 342 {
 343         $repo_base = gwvpmini_getConfigVal("repodir");
 344
 345         if(file_exists("$repo_base/$name.git")) return true;
 346         else return false;
 347 }
 348
 349 // default perms:
 350 // 0 - anyone can clone/read, only owner can write
 351 // 1 - noone can clone/read, repo is visible (i.e. name), only owner can read/write repo
 352 // 2 - only owner can see anything
 353 function gwvpmini_createGitRepo($name, $ownerid, $desc)
 354 {
 355         $repo_base = gwvpmini_getConfigVal("repodir");
 356
 357         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 358         error_log("would create $repo_base/$name.git");
 359         exec("/usr/bin/git init $repo_base/$name.git --bare > /tmp/gitlog 2>&1");
 360         chdir("$repo_base/$name.git");
 361         exec("/usr/bin/git update-server-info");
 362
 363         // gwvpmini_AddRepo($reponame, $repodesc, $repoowner, $defaultperms = 0)
 364         gwvpmini_AddRepo($name, $desc, $ownerid);
 365
 366         return true;
 367 }
 368
 369
 370 ?>