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