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/", "", $_SERVER["REQUEST_URI"]);
 105         chdir("$repo_base/$repo");
 106         exec("/usr/bin/git update-server-info");
 107
 108         if($_SERVER["REQUEST_METHOD"] == "POST") {
 109                         gwvp_AskForBasicAuth();
 110                         gwvp_callGitBackend($repo);
 111                         return;
 112         }
 113
 114         if(isset($_REQUEST["service"])) {
 115                 if($_REQUEST["service"] == "git-receive-pack") {
 116                         // we are a write call - we need auth and we're going to the backend proper
 117                         gwvp_AskForBasicAuth();
 118                         gwvp_callGitBackend($repo);
 119                         return;
 120                 }
 121         }
 122
 123
 124         if(file_exists("$repo_base/$repo/$newloc")) {
 125                 error_log("would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc");
 126                 $fh = fopen("$repo_base/$repo/$newloc", "rb");
 127
 128                 error_log("pushing file");
 129                 while(!feof($fh)) {
 130                         echo fread($fh, 8192);
 131                 }
 132         } else {
 133                 echo "would ask $repo,$actual_repo_name for $repo/$newloc from $repo_base/$repo/$newloc, NE";
 134                 header('HTTP/1.0 404 No Such Thing');
 135                 return;
 136         }
 137 }
 138
 139
 140 function gwvp_callGitBackend($repo)
 141 {
 142         // this is where things become a nightmare
 143                 $fh   = fopen('php://input', "r");
 144
 145                 $ruri = $_SERVER["REQUEST_URI"];
 146                 $strrem = "git/$repo";
 147                 $euri = str_replace($strrem, "", $_REQUEST["q"]);
 148                 //$euri = preg_replace("/^git\/$repo\.git/", "", $_REQUEST["q"]);
 149
 150
 151
 152                 $rmeth = $_SERVER["REQUEST_METHOD"];
 153
 154                 $qs = "";
 155                 foreach($_REQUEST as $key => $var) {
 156                         if($key != "q") {
 157                                 //error_log("adding, $var from $key");
 158                                 if($qs == "") $qs.="$key=$var";
 159                                 else $qs.="&$key=$var";
 160                         }
 161                 }
 162
 163                 //sleep(2);
 164
 165
 166
 167                 // this is where the fun, it ends.
 168                 $myoutput = "";
 169                 unset($myoutput);
 170
 171                 // this be nasty!
 172
 173                 // setup env
 174                 if(isset($procenv))     unset($procenv);
 175                 $procenv["GATEWAY_INTERFACE"] = "CGI/1.1";
 176                 $procenv["PATH_TRANSLATED"] = "/tmp/$repo/$euri";
 177                 $procenv["REQUEST_METHOD"] = "$rmeth";
 178                 $procenv["GIT_HTTP_EXPORT_ALL"] = "1";
 179                 $procenv["QUERY_STRING"] = "$qs";
 180                 $procenv["HTTP_USER_AGENT"] = "git/1.7.1";
 181                 $procenv["REMOTE_USER"] = "user";
 182                 $procenv["REMOTE_ADDR"] = "1.2.3.4";
 183                 $procenv["AUTH_TYPE"] = "Basic";
 184
 185                 if(isset($_SERVER["CONTENT_TYPE"])) {
 186                         $procenv["CONTENT_TYPE"] = $_SERVER["CONTENT_TYPE"];
 187                 } else {
 188                         //$procenv["CONTENT_TYPE"] = "";
 189                 }
 190                 if(isset($_SERVER["CONTENT_LENGTH"])) {
 191                         $procenv["CONTENT_LENGTH"] = $_SERVER["CONTENT_LENGTH"];
 192                 }
 193
 194                 error_log("path trans'd is /tmp/$repo/$euri from $ruri with ".$_REQUEST["q"]." $strrem");
 195
 196
 197
 198
 199                 $pwd = "/tmp/";
 200
 201                 $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);
 202
 203                 $untilblank = false;
 204                 while(!$untilblank&&!feof($pipes[1])) {
 205                         $lines_t = fgets($pipes[1]);
 206                         $lines = trim($lines_t);
 207                         error_log("got line: $lines");
 208                         if($lines_t == "\r\n") {
 209                                 $untilblank = true;
 210                                 error_log("now blank");
 211                         } else header($lines);
 212                         if($lines === false) {
 213                                 error_log("got an unexpexted exit...");
 214                                 exit(0);
 215                         }
 216
 217                 }
 218
 219
 220                 $firstline = true;
 221                 $continue = true;
 222
 223                 if(!stream_set_blocking($fh,0)) {
 224                         error_log("cant set input non-blocking");
 225                 }
 226
 227                 if(!stream_set_blocking($pipes[1],0)) {
 228                         error_log("cant set pipe1 non-blocking");
 229                 }
 230
 231                 // i was going to use stream_select, but i feel this works better like this
 232                 while($continue) {
 233                         // do client
 234                         if(!feof($fh)) {
 235                                 $from_client_data = fread($fh,8192);
 236                                 if($from_client_data !== false) fwrite($pipes[0], $from_client_data);
 237                                 fflush($pipes[0]);
 238                                 //fwrite($fl, $from_client_data);
 239                                 $client_len = strlen($from_client_data);
 240                         } else {
 241                                 error_log("client end");
 242                                 $client_len = 0;
 243                         }
 244
 245                         // do cgi
 246                         // sometimes, we get a \r\n from the cgi, i do not know why she swallowed the fly,
 247                         // but i do know that the fgets for the headers above should have comsued that
 248                         if(!feof($pipes[1])) {
 249                                 $from_cgi_data_t = fread($pipes[1],8192);
 250                                 $from_cgi_data = $from_cgi_data_t;
 251
 252                                 // i dont know if this will solve it... it coudl cause some serious issues elsewhere
 253                                 // TODO: this is a hack, i need to know why the fgets above doesn consume the \r\n even tho it reads it
 254                                 // i.e. why the pointer doesnt increment over it, cause the freads above then get them again.
 255                                 if($firstline) {
 256                                         if(strlen($from_cgi_data_t)>0) {
 257                                                 // i dont get why this happens, and its very frustrating.. im not sure if its a bug in php
 258                                                 // or something the git-http-backend thing is doing..
 259                                                 // TODO: find out why this happens
 260                                                 $from_cgi_data = preg_replace("/^\r\n/", "", $from_cgi_data_t);
 261                                                 if(strlen($from_cgi_data)!=strlen($from_cgi_data_t)) {
 262                                                         error_log("MOOOKS - we did trunc");
 263                                                 } else {
 264                                                         error_log("MOOOKS - we did not trunc");
 265                                                 }
 266                                                 $firstline = false;
 267                                         }
 268                                 }
 269
 270                                 if($from_cgi_data !== false) {
 271                                         echo $from_cgi_data;
 272                                         flush();
 273                                 }
 274                                 $cgi_len = strlen($from_cgi_data);
 275                         } else {
 276                                 error_log("cgi end");
 277                                 $cgi_len = 0;
 278                         }
 279
 280                         if(feof($pipes[1])) $continue = false;
 281                         else {
 282                                 if($client_len == 0 && $cgi_len == 0) {
 283                                         usleep(200000);
 284                                         error_log("sleep tick");
 285                                 } else {
 286                                         error_log("sizes: $client_len, $cgi_len");
 287                                         if($cgi_len > 0) {
 288                                                 error_log("from cgi: \"$from_cgi_data\"");
 289                                         }
 290                                 }
 291                         }
 292
 293                 }
 294
 295
 296                 //fclose($fl);
 297                 fclose($fh);
 298                 fclose($pipes[1]);
 299                 fclose($pipes[0]);
 300 }
 301
 302
 303
 304 function gwvp_repoExists($name)
 305 {
 306         global $repo_base;
 307
 308         if(file_exists("$repo_base/$name.git")) return true;
 309         else return false;
 310 }
 311
 312 function gwvp_createGitRepo($name, $bundle=null)
 313 {
 314         global $repo_base;
 315
 316         // phew, this works, but i tell you this - bundles arent quite as nice as they should be
 317         if($bundle == null) {
 318                 error_log("would create $repo_base/$name.git");
 319                 exec("/usr/bin/git init $repo_base/$name.git --bare > /tmp/gitlog 2>&1");
 320                 chdir("$repo_base/$name.git");
 321                 exec("/usr/bin/git update-server-info");
 322         } else {
 323                 error_log("create via mirror on $repo_base/$name.git");
 324                 exec("/usr/bin/git clone --mirror $bundle $repo_base/$name.git > /tmp/gitlog 2>&1");
 325                 chdir("$repo_base/$name.git");
 326                 exec("/usr/bin/git update-server-info");
 327         }
 328
 329         return true;
 330 }
 331 ?>