gwvplib/gwvpgitcontrol.php

   1 <?php
   2
   3 $CALL_ME_FUNCTIONS["gitcontrol"] = "gwvp_gitControlCallMe";
   4
   5 //$MENU_ITEMS["20repos"]["text"] = "Repo Admin";
   6 //$MENU_ITEMS["20repos"]["link"] = "$BASE_URL/admin/repos";
   7
   8 function gwvp_gitControlCallMe()
   9 {
  10         if(isset($_REQUEST["q"])) {
  11                 $query = $_REQUEST["q"];
  12                 $qspl = explode("/", $query);
  13                 if(isset($qspl[0])) {
  14                         if($qspl[0] == "git") {
  15                                 return "gwvp_gitBackendInterface";
  16                         }
  17                 }
  18                 else return false;
  19         }
  20
  21         return false;
  22
  23 }
  24
  25 function gwvp_repoPermissionCheck($repo, $user)
  26 {
  27         return true;
  28 }
  29
  30 function gwvp_gitBackendInterface()
  31 {
  32         global $repo_base, $BASE_URL;
  33
  34
  35         $repo = "";
  36         $newloc = "/";
  37         if(isset($_REQUEST["q"])) {
  38                 $query = $_REQUEST["q"];
  39                 $qspl = explode("/", $query);
  40                 $repo = $qspl[1];
  41                 for($i=2; $i < count($qspl); $i++) {
  42                         $newloc .= "/".$qspl[$i];
  43                 }
  44         }
  45
  46         $actual_repo_name = preg_replace("/\.git$/", "", $repo);
  47
  48         $user = gwvp_checkBasicAuthLogin();
  49
  50         if(!$user) {
  51                 error_log("User is set to false, so its anonymouse");
  52         } else {
  53                 error_log("user is $user");
  54         }
  55
  56         // must remember that $user of false is anonymous when we code gwvp_repoPerm'sCheck()
  57         if(!gwvp_repoPermissionCheck($actual_repo_name, $user)) {
  58                 error_log("perms check fails - start auth");
  59                 if(isset($_SERVER["PHP_AUTH_USER"])) {
  60                         error_log("have auth - push 403");
  61                         gwvp_fourZeroThree();
  62                 } else {
  63                         error_log("push auth");
  64                         gwvp_AskForBasicAuth();
  65                         return;
  66                 }
  67         }
  68
  69         // we need to quite a bit of parsing in here. The "repo" will always be /git/repo.git
  70         // but if we get here from a browser, we need to forward back to a normal repo viewer
  71         // the only way i can think of doing this is to check the useragent for the word "git"
  72
  73         /*
  74          * here we need to
  75          * 1) figure out the repo its acessing
  76          * 2) figure out the perms on the repo
  77          * 3) determine if its a pull or a push
  78          * - if its a pull, we just serve straight from the fs
  79          * - if its a push, we go thru git-http-backend
  80          * 4) if it requiers auth, we push to auth
  81          *
  82          */
  83         $agent = "git-unknown";
  84         $isgitagent = false;
  85
  86         // tested the user agent bit with jgit from eclipse and normal git... seems to work
  87         if(isset($_SERVER["HTTP_USER_AGENT"])) {
  88                 $agent = $_SERVER["HTTP_USER_AGENT"];
  89                 error_log("in git backend with user agent $agent");
  90                 if(stristr($agent, "git")!==false) {
  91                         $isgitagent = true;
  92                 }
  93         }
  94
  95
  96
  97         /* dont need this code right now
  98         if($isgitagent) echo "GIT: i am a git backened interface for a repo $repo, agent $agent";
  99         else echo "NOT GIT: i am a git backened interface for a repo $repo, agent $agent";
 100         */
 101
 102         // now we need to rebuild the actual request or do we?
 103         //$basegit = "$BASE_URL/git/something.git";
 104         //$newloc = preg_replace("/^$basegit/", "", $_SERVER["REQUEST_URI"]);
 105         if($_SERVER["REQUEST_METHOD"] == "POST") {
 106                         gwvp_AskForBasicAuth();
 107                         gwvp_callGitBackend($repo);
 108                         return;
 109         }
 110
 111         if(isset($_REQUEST["service"])) {
 112                 if($_REQUEST["service"] == "git-receive-pack") {
 113                         // we are a write call - we need auth and we're going to the backend proper
 114                         gwvp_AskForBasicAuth();
 115                         gwvp_callGitBackend($repo);
 116                         return;
 117                 }
 118         }
 119
 120
 121         if(file_exists("$repo_base/$repo/$newloc")) {
 122                 error_log("would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc");
 123                 $fh = fopen("$repo_base/$repo/$newloc", "rb");
 124
 125                 error_log("pushing file");
 126                 while(!feof($fh)) {
 127                         echo fread($fh, 8192);
 128                 }
 129         } else {
 130                 echo "would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc, NE";
 131                 header('HTTP/1.0 404 No Such Thing');
 132                 return;
 133         }
 134 }
 135
 136
 137 function gwvp_callGitBackend($repo)
 138 {
 139         // this is where things become a nightmare
 140                 $fh   = fopen('php://input', "r");
 141
 142                 $ruri = $_SERVER["REQUEST_URI"];
 143                 $strrem = "git/$repo";
 144                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 145                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 146
 147
 148
 149                 $rmeth = $_SERVER["REQUEST_METHOD"];
 150
 151                 $qs = "";
 152                 foreach($_REQUEST as $key => $var) {
 153                         if($key != "q") {
 154                                 //error_log("adding, $var from $key");
 155                                 if($qs == "") $qs.="$key=$var";
 156                                 else $qs.="&$key=$var";
 157                         }
 158                 }
 159
 160                 //sleep(2);
 161
 162
 163
 164                 // this is where the fun, it ends.
 165                 $myoutput = "";
 166                 unset($myoutput);
 167
 168                 // this be nasty!
 169
 170                 // setup env
 171                 if(isset($procenv))     unset($procenv);
 172                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 173                 $procenv["PATH_TRANSLATED"] = "/tmp/$repo/$euri";
 174                 $procenv["REQUEST_METHOD"] = "$rmeth";
 175                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 176                 $procenv["QUERY_STRING"] = "$qs";
 177                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 178                 $procenv["REMOTE_USER"] = "user";
 179                 $procenv["REMOTE_ADDR"] = "1.2.3.4";
 180                 $procenv["AUTH_TYPE"] = "Basic";
 181
 182                 if(isset($_SERVER["CONTENT_TYPE"])) {
 183                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 184                 } else {
 185                         //$procenv["CONTENT_TYPE"] = "";
 186                 }
 187                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 188                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 189                 }
 190
 191                 error_log("path trans'd is /tmp/$repo/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 192
 193
 194                 $pwd = "/tmp/";
 195
 196                 $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);
 197
 198                 $untilblank = false;
 199                 while(!$untilblank&&!feof($pipes[1])) {
 200                         $lines_t = fgets($pipes[1]);
 201                         $lines = trim($lines_t);
 202                         error_log("got line: $lines");
 203                         if($lines_t == "\r\n") {
 204                                 $untilblank = true;
 205                                 error_log("now blank");
 206                         } else header($lines);
 207                         if($lines === false) {
 208                                 error_log("got an unexpexted exit...");
 209                                 exit(0);
 210                         }
 211
 212                 }
 213
 214
 215                 $firstline = true;
 216                 $continue = true;
 217
 218                 if(!stream_set_blocking($fh,0)) {
 219                         error_log("cant set input non-blocking");
 220                 }
 221
 222                 if(!stream_set_blocking($pipes[1],0)) {
 223                         error_log("cant set pipe1 non-blocking");
 224                 }
 225
 226                 // i was going to use stream_select, but i feel this works better like this
 227                 while($continue) {
 228                         // do client
 229                         if(!feof($fh)) {
 230                                 $from_client_data = fread($fh,8192);
 231                                 if($from_client_data !== false) fwrite($pipes[0], $from_client_data);
 232                                 fflush($pipes[0]);
 233                                 //fwrite($fl, $from_client_data);
 234                                 $client_len = strlen($from_client_data);
 235                         } else {
 236                                 error_log("client end");
 237                                 $client_len = 0;
 238                         }
 239
 240                         // do cgi
 241                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 242                         // but i do know that the fgets for the headers above should have comsued that
 243                         if(!feof($pipes[1])) {
 244                                 $from_cgi_data_t = fread($pipes[1],8192);
 245                                 $from_cgi_data = $from_cgi_data_t;
 246
 247                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 248                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 249                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 250                                 if($firstline) {
 251                                         if(strlen($from_cgi_data_t)>0) {
 252                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 253                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 254                                                         error_log("MOOOKS - we did trunc");
 255                                                 }
 256                                                 $firstline = false;
 257                                         }
 258                                 }
 259
 260                                 if($from_cgi_data !== false) {
 261                                         echo $from_cgi_data;
 262                                         flush();
 263                                 }
 264                                 $cgi_len = strlen($from_cgi_data);
 265                         } else {
 266                                 error_log("cgi end");
 267                                 $cgi_len = 0;
 268                         }
 269
 270                         if(feof($pipes[1])) $continue = false;
 271                         else {
 272                                 if($client_len == 0 && $cgi_len == 0) {
 273                                         usleep(200000);
 274                                         error_log("sleep tick");
 275                                 } else {
 276                                         error_log("sizes: $client_len, $cgi_len");
 277                                         if($cgi_len > 0) {
 278                                                 error_log("from cgi: \"$from_cgi_data\"");
 279                                         }
 280                                 }
 281                         }
 282
 283                 }
 284
 285
 286                 //fclose($fl);
 287                 fclose($fh);
 288                 fclose($pipes[1]);
 289                 fclose($pipes[0]);
 290 }
 291
 292
 293
 294 function gwvp_repoExists($name)
 295 {
 296         global $repo_base;
 297
 298         if(file_exists("$repo_base/$name.git")) return true;
 299         else return false;
 300 }
 301
 302 function gwvp_createGitRepo($name, $bundle=null)
 303 {
 304         global $repo_base;
 305
 306         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 307         if($bundle == null) {
 308                 error_log("would create $repo_base/$name.git");
 309                 exec("/usr/bin/git init $repo_base/$name.git --bare > /tmp/gitlog 2>&1");
 310                 chdir("$repo_base/$name.git");
 311                 exec("/usr/bin/git update-server-info");
 312         } else {
 313                 error_log("create via mirror on $repo_base/$name.git");
 314                 exec("/usr/bin/git clone --mirror $bundle $repo_base/$name.git > /tmp/gitlog 2>&1");
 315                 chdir("$repo_base/$name.git");
 316                 exec("/usr/bin/git update-server-info");
 317         }
 318
 319         return true;
 320 }
 321 ?>