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