gotwebd/gotweb.c

   1 /*
   2  * Copyright (c) 2016, 2019, 2020-2022 Tracey Emery <tracey@traceyemery.net>
   3  * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
   4  * Copyright (c) 2014 Reyk Floeter <reyk@openbsd.org>
   5  * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
   6  * Copyright (c) 2013 Florian Obser <florian@openbsd.org>
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20 #include "got_compat.h"
  21
  22 #include <net/if.h>
  23 #include <netinet/in.h>
  24 #include <sys/queue.h>
  25 #include <sys/stat.h>
  26 #include <sys/types.h>
  27
  28 #include <ctype.h>
  29 #include <dirent.h>
  30 #include <errno.h>
  31 #include <event.h>
  32 #include <fcntl.h>
  33 #include <imsg.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <unistd.h>
  38
  39 #include "got_error.h"
  40 #include "got_object.h"
  41 #include "got_reference.h"
  42 #include "got_repository.h"
  43 #include "got_path.h"
  44 #include "got_cancel.h"
  45 #include "got_worktree.h"
  46 #include "got_diff.h"
  47 #include "got_commit_graph.h"
  48 #include "got_blame.h"
  49 #include "got_privsep.h"
  50
  51 #include "proc.h"
  52 #include "gotwebd.h"
  53 #include "tmpl.h"
  54
  55 static const struct querystring_keys querystring_keys[] = {
  56         { "action",             ACTION },
  57         { "commit",             COMMIT },
  58         { "file",               RFILE },
  59         { "folder",             FOLDER },
  60         { "headref",            HEADREF },
  61         { "index_page",         INDEX_PAGE },
  62         { "path",               PATH },
  63         { "page",               PAGE },
  64 };
  65
  66 static const struct action_keys action_keys[] = {
  67         { "blame",      BLAME },
  68         { "blob",       BLOB },
  69         { "blobraw",    BLOBRAW },
  70         { "briefs",     BRIEFS },
  71         { "commits",    COMMITS },
  72         { "diff",       DIFF },
  73         { "error",      ERR },
  74         { "index",      INDEX },
  75         { "summary",    SUMMARY },
  76         { "tag",        TAG },
  77         { "tags",       TAGS },
  78         { "tree",       TREE },
  79         { "rss",        RSS },
  80 };
  81
  82 static const struct got_error *gotweb_init_querystring(struct querystring **);
  83 static const struct got_error *gotweb_parse_querystring(struct querystring **,
  84     char *);
  85 static const struct got_error *gotweb_assign_querystring(struct querystring **,
  86     char *, char *);
  87 static int gotweb_render_index(struct template *);
  88 static const struct got_error *gotweb_init_repo_dir(struct repo_dir **,
  89     const char *);
  90 static const struct got_error *gotweb_load_got_path(struct request *c,
  91     struct repo_dir *);
  92 static const struct got_error *gotweb_get_repo_description(char **,
  93     struct server *, const char *, int);
  94 static const struct got_error *gotweb_get_clone_url(char **, struct server *,
  95     const char *, int);
  96
  97 static void gotweb_free_querystring(struct querystring *);
  98 static void gotweb_free_repo_dir(struct repo_dir *);
  99
 100 struct server *gotweb_get_server(uint8_t *, uint8_t *);
 101
 102 static int
 103 gotweb_reply(struct request *c, int status, const char *ctype,
 104     struct gotweb_url *location)
 105 {
 106         const char      *csp;
 107
 108         if (status != 200 && fcgi_printf(c, "Status: %d\r\n", status) == -1)
 109                 return -1;
 110
 111         if (location) {
 112                 if (fcgi_puts(c->tp, "Location: ") == -1 ||
 113                     gotweb_render_url(c, location) == -1 ||
 114                     fcgi_puts(c->tp, "\r\n") == -1)
 115                         return -1;
 116         }
 117
 118         csp = "Content-Security-Policy: default-src 'self'; "
 119             "script-src 'none'; object-src 'none';\r\n";
 120         if (fcgi_puts(c->tp, csp) == -1)
 121                 return -1;
 122
 123         if (ctype && fcgi_printf(c, "Content-Type: %s\r\n", ctype) == -1)
 124                 return -1;
 125
 126         return fcgi_puts(c->tp, "\r\n");
 127 }
 128
 129 static int
 130 gotweb_reply_file(struct request *c, const char *ctype, const char *file,
 131     const char *suffix)
 132 {
 133         int r;
 134
 135         r = fcgi_printf(c, "Content-Disposition: attachment; "
 136             "filename=%s%s\r\n", file, suffix ? suffix : "");
 137         if (r == -1)
 138                 return -1;
 139         return gotweb_reply(c, 200, ctype, NULL);
 140 }
 141
 142 void
 143 gotweb_process_request(struct request *c)
 144 {
 145         const struct got_error *error = NULL;
 146         struct server *srv = NULL;
 147         struct querystring *qs = NULL;
 148         struct repo_dir *repo_dir = NULL;
 149         const char *rss_ctype = "application/rss+xml;charset=utf-8";
 150         const uint8_t *buf;
 151         size_t len;
 152         int r, binary = 0;
 153
 154         /* init the transport */
 155         error = gotweb_init_transport(&c->t);
 156         if (error) {
 157                 log_warnx("%s: %s", __func__, error->msg);
 158                 return;
 159         }
 160         /* don't process any further if client disconnected */
 161         if (c->sock->client_status == CLIENT_DISCONNECT)
 162                 return;
 163         /* get the gotwebd server */
 164         srv = gotweb_get_server(c->server_name, c->http_host);
 165         if (srv == NULL) {
 166                 log_warnx("%s: error server is NULL", __func__);
 167                 goto err;
 168         }
 169         c->srv = srv;
 170         /* parse our querystring */
 171         error = gotweb_init_querystring(&qs);
 172         if (error) {
 173                 log_warnx("%s: %s", __func__, error->msg);
 174                 goto err;
 175         }
 176         c->t->qs = qs;
 177         error = gotweb_parse_querystring(&qs, c->querystring);
 178         if (error) {
 179                 log_warnx("%s: %s", __func__, error->msg);
 180                 goto err;
 181         }
 182
 183         /*
 184          * certain actions require a commit id in the querystring. this stops
 185          * bad actors from exploiting this by manually manipulating the
 186          * querystring.
 187          */
 188
 189         if (qs->action == BLAME || qs->action == BLOB ||
 190             qs->action == BLOBRAW || qs->action == DIFF) {
 191                 if (qs->commit == NULL) {
 192                         error = got_error(GOT_ERR_QUERYSTRING);
 193                         goto err;
 194                 }
 195         }
 196
 197         if (qs->action != INDEX) {
 198                 error = gotweb_init_repo_dir(&repo_dir, qs->path);
 199                 if (error)
 200                         goto err;
 201                 error = gotweb_load_got_path(c, repo_dir);
 202                 c->t->repo_dir = repo_dir;
 203                 if (error && error->code != GOT_ERR_LONELY_PACKIDX)
 204                         goto err;
 205         }
 206
 207         if (qs->action == BLOBRAW || qs->action == BLOB) {
 208                 error = got_get_repo_commits(c, 1);
 209                 if (error)
 210                         goto err;
 211
 212                 error = got_open_blob_for_output(&c->t->blob, &c->t->fd,
 213                     &binary, c);
 214                 if (error)
 215                         goto err;
 216         }
 217
 218         switch(qs->action) {
 219         case BLAME:
 220                 error = got_get_repo_commits(c, 1);
 221                 if (error) {
 222                         log_warnx("%s: %s", __func__, error->msg);
 223                         goto err;
 224                 }
 225                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 226                         return;
 227                 gotweb_render_page(c->tp, gotweb_render_blame);
 228                 return;
 229         case BLOB:
 230                 if (binary) {
 231                         struct gotweb_url url = {
 232                                 .index_page = -1,
 233                                 .page = -1,
 234                                 .action = BLOBRAW,
 235                                 .path = qs->path,
 236                                 .commit = qs->commit,
 237                                 .folder = qs->folder,
 238                                 .file = qs->file,
 239                         };
 240
 241                         gotweb_reply(c, 302, NULL, &url);
 242                         return;
 243                 }
 244
 245                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 246                         return;
 247                 gotweb_render_page(c->tp, gotweb_render_blob);
 248                 return;
 249         case BLOBRAW:
 250                 if (binary)
 251                         r = gotweb_reply_file(c, "application/octet-stream",
 252                             qs->file, NULL);
 253                 else
 254                         r = gotweb_reply(c, 200, "text/plain", NULL);
 255                 if (r == -1)
 256                         return;
 257
 258                 for (;;) {
 259                         error = got_object_blob_read_block(&len, c->t->blob);
 260                         if (error)
 261                                 break;
 262                         if (len == 0)
 263                                 break;
 264                         buf = got_object_blob_get_read_buf(c->t->blob);
 265                         if (fcgi_gen_binary_response(c, buf, len) == -1)
 266                                 break;
 267                 }
 268                 return;
 269         case BRIEFS:
 270                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 271                         return;
 272                 gotweb_render_page(c->tp, gotweb_render_briefs);
 273                 return;
 274         case COMMITS:
 275                 error = got_get_repo_commits(c, srv->max_commits_display);
 276                 if (error) {
 277                         log_warnx("%s: %s", __func__, error->msg);
 278                         goto err;
 279                 }
 280                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 281                         return;
 282                 gotweb_render_page(c->tp, gotweb_render_commits);
 283                 return;
 284         case DIFF:
 285                 error = got_get_repo_commits(c, 1);
 286                 if (error) {
 287                         log_warnx("%s: %s", __func__, error->msg);
 288                         goto err;
 289                 }
 290                 error = got_open_diff_for_output(&c->t->fp, &c->t->fd, c);
 291                 if (error) {
 292                         log_warnx("%s: %s", __func__, error->msg);
 293                         goto err;
 294                 }
 295                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 296                         return;
 297                 gotweb_render_page(c->tp, gotweb_render_diff);
 298                 return;
 299         case INDEX:
 300                 c->t->nrepos = scandir(srv->repos_path, &c->t->repos, NULL,
 301                     alphasort);
 302                 if (c->t->nrepos == -1) {
 303                         c->t->repos = NULL;
 304                         error = got_error_from_errno2("scandir",
 305                             srv->repos_path);
 306                         goto err;
 307                 }
 308                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 309                         return;
 310                 gotweb_render_page(c->tp, gotweb_render_index);
 311                 return;
 312         case RSS:
 313                 error = got_get_repo_tags(c, D_MAXSLCOMMDISP);
 314                 if (error)
 315                         goto err;
 316                 if (gotweb_reply_file(c, rss_ctype, repo_dir->name, ".rss")
 317                     == -1)
 318                         return;
 319                 gotweb_render_rss(c->tp);
 320                 return;
 321         case SUMMARY:
 322                 error = got_ref_list(&c->t->refs, c->t->repo, "refs/heads",
 323                     got_ref_cmp_by_name, NULL);
 324                 if (error) {
 325                         log_warnx("%s: got_ref_list: %s", __func__,
 326                             error->msg);
 327                         goto err;
 328                 }
 329                 qs->action = TAGS;
 330                 error = got_get_repo_tags(c, D_MAXSLCOMMDISP);
 331                 if (error) {
 332                         log_warnx("%s: got_get_repo_tags: %s", __func__,
 333                             error->msg);
 334                         goto err;
 335                 }
 336                 qs->action = SUMMARY;
 337                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 338                         return;
 339                 gotweb_render_page(c->tp, gotweb_render_summary);
 340                 return;
 341         case TAG:
 342                 error = got_get_repo_tags(c, 1);
 343                 if (error) {
 344                         log_warnx("%s: %s", __func__, error->msg);
 345                         goto err;
 346                 }
 347                 if (c->t->tag_count == 0) {
 348                         error = got_error_msg(GOT_ERR_BAD_OBJ_ID,
 349                             "bad commit id");
 350                         goto err;
 351                 }
 352                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 353                         return;
 354                 gotweb_render_page(c->tp, gotweb_render_tag);
 355                 return;
 356         case TAGS:
 357                 error = got_get_repo_tags(c, srv->max_commits_display);
 358                 if (error) {
 359                         log_warnx("%s: %s", __func__, error->msg);
 360                         goto err;
 361                 }
 362                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 363                         return;
 364                 gotweb_render_page(c->tp, gotweb_render_tags);
 365                 return;
 366         case TREE:
 367                 error = got_get_repo_commits(c, 1);
 368                 if (error) {
 369                         log_warnx("%s: %s", __func__, error->msg);
 370                         goto err;
 371                 }
 372                 if (gotweb_reply(c, 200, "text/html", NULL) == -1)
 373                         return;
 374                 gotweb_render_page(c->tp, gotweb_render_tree);
 375                 return;
 376         case ERR:
 377         default:
 378                 error = got_error(GOT_ERR_BAD_QUERYSTRING);
 379         }
 380
 381 err:
 382         c->t->error = error;
 383         if (gotweb_reply(c, 400, "text/html", NULL) == -1)
 384                 return;
 385         gotweb_render_page(c->tp, gotweb_render_error);
 386 }
 387
 388 struct server *
 389 gotweb_get_server(uint8_t *server_name, uint8_t *subdomain)
 390 {
 391         struct server *srv = NULL;
 392
 393         /* check against the server name first */
 394         if (strlen(server_name) > 0)
 395                 TAILQ_FOREACH(srv, &gotwebd_env->servers, entry)
 396                         if (strcmp(srv->name, server_name) == 0)
 397                                 goto done;
 398
 399         /* check against subdomain second */
 400         if (strlen(subdomain) > 0)
 401                 TAILQ_FOREACH(srv, &gotwebd_env->servers, entry)
 402                         if (strcmp(srv->name, subdomain) == 0)
 403                                 goto done;
 404
 405         /* if those fail, send first server */
 406         TAILQ_FOREACH(srv, &gotwebd_env->servers, entry)
 407                 if (srv != NULL)
 408                         break;
 409 done:
 410         return srv;
 411 };
 412
 413 const struct got_error *
 414 gotweb_init_transport(struct transport **t)
 415 {
 416         const struct got_error *error = NULL;
 417
 418         *t = calloc(1, sizeof(**t));
 419         if (*t == NULL)
 420                 return got_error_from_errno2("%s: calloc", __func__);
 421
 422         TAILQ_INIT(&(*t)->repo_commits);
 423         TAILQ_INIT(&(*t)->repo_tags);
 424         TAILQ_INIT(&(*t)->refs);
 425
 426         (*t)->repo = NULL;
 427         (*t)->repo_dir = NULL;
 428         (*t)->qs = NULL;
 429         (*t)->next_id = NULL;
 430         (*t)->prev_id = NULL;
 431         (*t)->next_disp = 0;
 432         (*t)->prev_disp = 0;
 433
 434         (*t)->fd = -1;
 435
 436         return error;
 437 }
 438
 439 static const struct got_error *
 440 gotweb_init_querystring(struct querystring **qs)
 441 {
 442         const struct got_error *error = NULL;
 443
 444         *qs = calloc(1, sizeof(**qs));
 445         if (*qs == NULL)
 446                 return got_error_from_errno2("%s: calloc", __func__);
 447
 448         (*qs)->headref = strdup("HEAD");
 449         if ((*qs)->headref == NULL) {
 450                 free(*qs);
 451                 *qs = NULL;
 452                 return got_error_from_errno2("%s: strdup", __func__);
 453         }
 454
 455         (*qs)->action = INDEX;
 456         (*qs)->commit = NULL;
 457         (*qs)->file = NULL;
 458         (*qs)->folder = NULL;
 459         (*qs)->index_page = 0;
 460         (*qs)->path = NULL;
 461
 462         return error;
 463 }
 464
 465 static const struct got_error *
 466 gotweb_parse_querystring(struct querystring **qs, char *qst)
 467 {
 468         const struct got_error *error = NULL;
 469         char *tok1 = NULL, *tok1_pair = NULL, *tok1_end = NULL;
 470         char *tok2 = NULL, *tok2_pair = NULL, *tok2_end = NULL;
 471
 472         if (qst == NULL)
 473                 return error;
 474
 475         tok1 = strdup(qst);
 476         if (tok1 == NULL)
 477                 return got_error_from_errno2("%s: strdup", __func__);
 478
 479         tok1_pair = tok1;
 480         tok1_end = tok1;
 481
 482         while (tok1_pair != NULL) {
 483                 strsep(&tok1_end, "&");
 484
 485                 tok2 = strdup(tok1_pair);
 486                 if (tok2 == NULL) {
 487                         free(tok1);
 488                         return got_error_from_errno2("%s: strdup", __func__);
 489                 }
 490
 491                 tok2_pair = tok2;
 492                 tok2_end = tok2;
 493
 494                 while (tok2_pair != NULL) {
 495                         strsep(&tok2_end, "=");
 496                         if (tok2_end) {
 497                                 error = gotweb_assign_querystring(qs, tok2_pair,
 498                                     tok2_end);
 499                                 if (error)
 500                                         goto err;
 501                         }
 502                         tok2_pair = tok2_end;
 503                 }
 504                 free(tok2);
 505                 tok1_pair = tok1_end;
 506         }
 507         free(tok1);
 508         return error;
 509 err:
 510         free(tok2);
 511         free(tok1);
 512         return error;
 513 }
 514
 515 /*
 516  * Adapted from usr.sbin/httpd/httpd.c url_decode.
 517  */
 518 static const struct got_error *
 519 gotweb_urldecode(char *url)
 520 {
 521         char            *p, *q;
 522         char             hex[3];
 523         unsigned long    x;
 524
 525         hex[2] = '\0';
 526         p = q = url;
 527
 528         while (*p != '\0') {
 529                 switch (*p) {
 530                 case '%':
 531                         /* Encoding character is followed by two hex chars */
 532                         if (!isxdigit((unsigned char)p[1]) ||
 533                             !isxdigit((unsigned char)p[2]) ||
 534                             (p[1] == '0' && p[2] == '0'))
 535                                 return got_error(GOT_ERR_BAD_QUERYSTRING);
 536
 537                         hex[0] = p[1];
 538                         hex[1] = p[2];
 539
 540                         /*
 541                          * We don't have to validate "hex" because it is
 542                          * guaranteed to include two hex chars followed by nul.
 543                          */
 544                         x = strtoul(hex, NULL, 16);
 545                         *q = (char)x;
 546                         p += 2;
 547                         break;
 548                 default:
 549                         *q = *p;
 550                         break;
 551                 }
 552                 p++;
 553                 q++;
 554         }
 555         *q = '\0';
 556
 557         return NULL;
 558 }
 559
 560 static const struct got_error *
 561 gotweb_assign_querystring(struct querystring **qs, char *key, char *value)
 562 {
 563         const struct got_error *error = NULL;
 564         const char *errstr;
 565         int a_cnt, el_cnt;
 566
 567         error = gotweb_urldecode(value);
 568         if (error)
 569                 return error;
 570
 571         for (el_cnt = 0; el_cnt < QSELEM__MAX; el_cnt++) {
 572                 if (strcmp(key, querystring_keys[el_cnt].name) != 0)
 573                         continue;
 574
 575                 switch (querystring_keys[el_cnt].element) {
 576                 case ACTION:
 577                         for (a_cnt = 0; a_cnt < ACTIONS__MAX; a_cnt++) {
 578                                 if (strcmp(value, action_keys[a_cnt].name) != 0)
 579                                         continue;
 580                                 else if (strcmp(value,
 581                                     action_keys[a_cnt].name) == 0){
 582                                         (*qs)->action =
 583                                             action_keys[a_cnt].action;
 584                                         goto qa_found;
 585                                 }
 586                         }
 587                         (*qs)->action = ERR;
 588 qa_found:
 589                         break;
 590                 case COMMIT:
 591                         (*qs)->commit = strdup(value);
 592                         if ((*qs)->commit == NULL) {
 593                                 error = got_error_from_errno2("%s: strdup",
 594                                     __func__);
 595                                 goto done;
 596                         }
 597                         break;
 598                 case RFILE:
 599                         (*qs)->file = strdup(value);
 600                         if ((*qs)->file == NULL) {
 601                                 error = got_error_from_errno2("%s: strdup",
 602                                     __func__);
 603                                 goto done;
 604                         }
 605                         break;
 606                 case FOLDER:
 607                         (*qs)->folder = strdup(value);
 608                         if ((*qs)->folder == NULL) {
 609                                 error = got_error_from_errno2("%s: strdup",
 610                                     __func__);
 611                                 goto done;
 612                         }
 613                         break;
 614                 case HEADREF:
 615                         free((*qs)->headref);
 616                         (*qs)->headref = strdup(value);
 617                         if ((*qs)->headref == NULL) {
 618                                 error = got_error_from_errno2("%s: strdup",
 619                                     __func__);
 620                                 goto done;
 621                         }
 622                         break;
 623                 case INDEX_PAGE:
 624                         if (strlen(value) == 0)
 625                                 break;
 626                         (*qs)->index_page = strtonum(value, INT64_MIN,
 627                             INT64_MAX, &errstr);
 628                         if (errstr) {
 629                                 error = got_error_from_errno3("%s: strtonum %s",
 630                                     __func__, errstr);
 631                                 goto done;
 632                         }
 633                         if ((*qs)->index_page < 0)
 634                                 (*qs)->index_page = 0;
 635                         break;
 636                 case PATH:
 637                         (*qs)->path = strdup(value);
 638                         if ((*qs)->path == NULL) {
 639                                 error = got_error_from_errno2("%s: strdup",
 640                                     __func__);
 641                                 goto done;
 642                         }
 643                         break;
 644                 case PAGE:
 645                         if (strlen(value) == 0)
 646                                 break;
 647                         (*qs)->page = strtonum(value, INT64_MIN,
 648                             INT64_MAX, &errstr);
 649                         if (errstr) {
 650                                 error = got_error_from_errno3("%s: strtonum %s",
 651                                     __func__, errstr);
 652                                 goto done;
 653                         }
 654                         if ((*qs)->page < 0)
 655                                 (*qs)->page = 0;
 656                         break;
 657                 default:
 658                         break;
 659                 }
 660         }
 661 done:
 662         return error;
 663 }
 664
 665 void
 666 gotweb_free_repo_tag(struct repo_tag *rt)
 667 {
 668         if (rt != NULL) {
 669                 free(rt->commit_id);
 670                 free(rt->tag_name);
 671                 free(rt->tag_commit);
 672                 free(rt->commit_msg);
 673                 free(rt->tagger);
 674         }
 675         free(rt);
 676 }
 677
 678 void
 679 gotweb_free_repo_commit(struct repo_commit *rc)
 680 {
 681         if (rc != NULL) {
 682                 free(rc->path);
 683                 free(rc->refs_str);
 684                 free(rc->commit_id);
 685                 free(rc->parent_id);
 686                 free(rc->tree_id);
 687                 free(rc->author);
 688                 free(rc->committer);
 689                 free(rc->commit_msg);
 690         }
 691         free(rc);
 692 }
 693
 694 static void
 695 gotweb_free_querystring(struct querystring *qs)
 696 {
 697         if (qs != NULL) {
 698                 free(qs->commit);
 699                 free(qs->file);
 700                 free(qs->folder);
 701                 free(qs->headref);
 702                 free(qs->path);
 703         }
 704         free(qs);
 705 }
 706
 707 static void
 708 gotweb_free_repo_dir(struct repo_dir *repo_dir)
 709 {
 710         if (repo_dir != NULL) {
 711                 free(repo_dir->name);
 712                 free(repo_dir->owner);
 713                 free(repo_dir->description);
 714                 free(repo_dir->url);
 715                 free(repo_dir->path);
 716         }
 717         free(repo_dir);
 718 }
 719
 720 void
 721 gotweb_free_transport(struct transport *t)
 722 {
 723         const struct got_error *err;
 724         struct repo_commit *rc = NULL, *trc = NULL;
 725         struct repo_tag *rt = NULL, *trt = NULL;
 726         int i;
 727
 728         got_ref_list_free(&t->refs);
 729         TAILQ_FOREACH_SAFE(rc, &t->repo_commits, entry, trc) {
 730                 TAILQ_REMOVE(&t->repo_commits, rc, entry);
 731                 gotweb_free_repo_commit(rc);
 732         }
 733         TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
 734                 TAILQ_REMOVE(&t->repo_tags, rt, entry);
 735                 gotweb_free_repo_tag(rt);
 736         }
 737         gotweb_free_repo_dir(t->repo_dir);
 738         gotweb_free_querystring(t->qs);
 739         free(t->more_id);
 740         free(t->next_id);
 741         free(t->prev_id);
 742         if (t->blob)
 743                 got_object_blob_close(t->blob);
 744         if (t->fp) {
 745                 err = got_gotweb_flushfile(t->fp, t->fd);
 746                 if (err)
 747                         log_warnx("%s: got_gotweb_flushfile failure: %s",
 748                             __func__, err->msg);
 749                 t->fd = -1;
 750         }
 751         if (t->fd != -1)
 752                 close(t->fd);
 753         if (t->repos) {
 754                 for (i = 0; i < t->nrepos; ++i)
 755                         free(t->repos[i]);
 756                 free(t->repos);
 757         }
 758         free(t);
 759 }
 760
 761 void
 762 gotweb_get_navs(struct request *c, struct gotweb_url *prev, int *have_prev,
 763     struct gotweb_url *next, int *have_next)
 764 {
 765         struct transport *t = c->t;
 766         struct querystring *qs = t->qs;
 767         struct server *srv = c->srv;
 768
 769         *have_prev = *have_next = 0;
 770
 771         switch(qs->action) {
 772         case INDEX:
 773                 if (qs->index_page > 0) {
 774                         *have_prev = 1;
 775                         *prev = (struct gotweb_url){
 776                                 .action = -1,
 777                                 .index_page = qs->index_page - 1,
 778                                 .page = -1,
 779                         };
 780                 }
 781                 if (t->next_disp == srv->max_repos_display &&
 782                     t->repos_total != (qs->index_page + 1) *
 783                     srv->max_repos_display) {
 784                         *have_next = 1;
 785                         *next = (struct gotweb_url){
 786                                 .action = -1,
 787                                 .index_page = qs->index_page + 1,
 788                                 .page = -1,
 789                         };
 790                 }
 791                 break;
 792         case TAGS:
 793                 if (t->prev_id && qs->commit != NULL &&
 794                     strcmp(qs->commit, t->prev_id) != 0) {
 795                         *have_prev = 1;
 796                         *prev = (struct gotweb_url){
 797                                 .action = TAGS,
 798                                 .index_page = -1,
 799                                 .page = qs->page - 1,
 800                                 .path = qs->path,
 801                                 .commit = t->prev_id,
 802                                 .headref = qs->headref,
 803                         };
 804                 }
 805                 if (t->next_id) {
 806                         *have_next = 1;
 807                         *next = (struct gotweb_url){
 808                                 .action = TAGS,
 809                                 .index_page = -1,
 810                                 .page = qs->page + 1,
 811                                 .path = qs->path,
 812                                 .commit = t->next_id,
 813                                 .headref = qs->headref,
 814                         };
 815                 }
 816                 break;
 817         }
 818 }
 819
 820 static int
 821 gotweb_render_index(struct template *tp)
 822 {
 823         const struct got_error *error = NULL;
 824         struct request *c = tp->tp_arg;
 825         struct server *srv = c->srv;
 826         struct transport *t = c->t;
 827         struct querystring *qs = t->qs;
 828         struct repo_dir *repo_dir = NULL;
 829         struct dirent **sd_dent = t->repos;
 830         unsigned int d_i, d_disp = 0;
 831         unsigned int d_skipped = 0;
 832         int type, r;
 833
 834         if (gotweb_render_repo_table_hdr(c->tp) == -1)
 835                 return -1;
 836
 837         for (d_i = 0; d_i < t->nrepos; d_i++) {
 838                 if (srv->max_repos > 0 && t->prev_disp == srv->max_repos)
 839                         break;
 840
 841                 if (strcmp(sd_dent[d_i]->d_name, ".") == 0 ||
 842                     strcmp(sd_dent[d_i]->d_name, "..") == 0) {
 843                         d_skipped++;
 844                         continue;
 845                 }
 846
 847                 error = got_path_dirent_type(&type, srv->repos_path,
 848                     sd_dent[d_i]);
 849                 if (error)
 850                         continue;
 851                 if (type != DT_DIR) {
 852                         d_skipped++;
 853                         continue;
 854                 }
 855
 856                 if (qs->index_page > 0 && (qs->index_page *
 857                     srv->max_repos_display) > t->prev_disp) {
 858                         t->prev_disp++;
 859                         continue;
 860                 }
 861
 862                 error = gotweb_init_repo_dir(&repo_dir, sd_dent[d_i]->d_name);
 863                 if (error)
 864                         continue;
 865
 866                 error = gotweb_load_got_path(c, repo_dir);
 867                 if (error && error->code == GOT_ERR_LONELY_PACKIDX) {
 868                         if (error->code != GOT_ERR_NOT_GIT_REPO)
 869                                 log_warnx("%s: %s: %s", __func__,
 870                                     sd_dent[d_i]->d_name, error->msg);
 871                         gotweb_free_repo_dir(repo_dir);
 872                         repo_dir = NULL;
 873                         d_skipped++;
 874                         continue;
 875                 }
 876
 877                 d_disp++;
 878                 t->prev_disp++;
 879
 880                 r = gotweb_render_repo_fragment(c->tp, repo_dir);
 881                 gotweb_free_repo_dir(repo_dir);
 882                 if (r == -1)
 883                         return -1;
 884
 885                 t->next_disp++;
 886                 if (d_disp == srv->max_repos_display)
 887                         break;
 888         }
 889         t->repos_total = t->nrepos - d_skipped;
 890
 891         if (srv->max_repos_display == 0)
 892                 return 0;
 893         if (srv->max_repos > 0 && srv->max_repos < srv->max_repos_display)
 894                 return 0;
 895         if (t->repos_total <= srv->max_repos ||
 896             t->repos_total <= srv->max_repos_display)
 897                 return 0;
 898
 899         if (gotweb_render_navs(c->tp) == -1)
 900                 return -1;
 901
 902         return 0;
 903 }
 904
 905 static inline int
 906 should_urlencode(int c)
 907 {
 908         if (c <= ' ' || c >= 127)
 909                 return 1;
 910
 911         switch (c) {
 912                 /* gen-delim */
 913         case ':':
 914         case '/':
 915         case '?':
 916         case '#':
 917         case '[':
 918         case ']':
 919         case '@':
 920                 /* sub-delims */
 921         case '!':
 922         case '$':
 923         case '&':
 924         case '\'':
 925         case '(':
 926         case ')':
 927         case '*':
 928         case '+':
 929         case ',':
 930         case ';':
 931         case '=':
 932                 /* needed because the URLs are embedded into the HTML */
 933         case '\"':
 934                 return 1;
 935         default:
 936                 return 0;
 937         }
 938 }
 939
 940 static char *
 941 gotweb_urlencode(const char *str)
 942 {
 943         const char *s;
 944         char *escaped;
 945         size_t i, len;
 946         int a, b;
 947
 948         len = 0;
 949         for (s = str; *s; ++s) {
 950                 len++;
 951                 if (should_urlencode(*s))
 952                         len += 2;
 953         }
 954
 955         escaped = calloc(1, len + 1);
 956         if (escaped == NULL)
 957                 return NULL;
 958
 959         i = 0;
 960         for (s = str; *s; ++s) {
 961                 if (should_urlencode(*s)) {
 962                         a = (*s & 0xF0) >> 4;
 963                         b = (*s & 0x0F);
 964
 965                         escaped[i++] = '%';
 966                         escaped[i++] = a <= 9 ? ('0' + a) : ('7' + a);
 967                         escaped[i++] = b <= 9 ? ('0' + b) : ('7' + b);
 968                 } else
 969                         escaped[i++] = *s;
 970         }
 971
 972         return escaped;
 973 }
 974
 975 const char *
 976 gotweb_action_name(int action)
 977 {
 978         switch (action) {
 979         case BLAME:
 980                 return "blame";
 981         case BLOB:
 982                 return "blob";
 983         case BLOBRAW:
 984                 return "blobraw";
 985         case BRIEFS:
 986                 return "briefs";
 987         case COMMITS:
 988                 return "commits";
 989         case DIFF:
 990                 return "diff";
 991         case ERR:
 992                 return "err";
 993         case INDEX:
 994                 return "index";
 995         case SUMMARY:
 996                 return "summary";
 997         case TAG:
 998                 return "tag";
 999         case TAGS:
1000                 return "tags";
1001         case TREE:
1002                 return "tree";
1003         case RSS:
1004                 return "rss";
1005         default:
1006                 return NULL;
1007         }
1008 }
1009
1010 int
1011 gotweb_render_url(struct request *c, struct gotweb_url *url)
1012 {
1013         const char *sep = "?", *action;
1014         char *tmp;
1015         int r;
1016
1017         action = gotweb_action_name(url->action);
1018         if (action != NULL) {
1019                 if (fcgi_printf(c, "?action=%s", action) == -1)
1020                         return -1;
1021                 sep = "&";
1022         }
1023
1024         if (url->commit) {
1025                 if (fcgi_printf(c, "%scommit=%s", sep, url->commit) == -1)
1026                         return -1;
1027                 sep = "&";
1028         }
1029
1030         if (url->previd) {
1031                 if (fcgi_printf(c, "%sprevid=%s", sep, url->previd) == -1)
1032                         return -1;
1033                 sep = "&";
1034         }
1035
1036         if (url->prevset) {
1037                 if (fcgi_printf(c, "%sprevset=%s", sep, url->prevset) == -1)
1038                         return -1;
1039                 sep = "&";
1040         }
1041
1042         if (url->file) {
1043                 tmp = gotweb_urlencode(url->file);
1044                 if (tmp == NULL)
1045                         return -1;
1046                 r = fcgi_printf(c, "%sfile=%s", sep, tmp);
1047                 free(tmp);
1048                 if (r == -1)
1049                         return -1;
1050                 sep = "&";
1051         }
1052
1053         if (url->folder) {
1054                 tmp = gotweb_urlencode(url->folder);
1055                 if (tmp == NULL)
1056                         return -1;
1057                 r = fcgi_printf(c, "%sfolder=%s", sep, tmp);
1058                 free(tmp);
1059                 if (r == -1)
1060                         return -1;
1061                 sep = "&";
1062         }
1063
1064         if (url->headref) {
1065                 tmp = gotweb_urlencode(url->headref);
1066                 if (tmp == NULL)
1067                         return -1;
1068                 r = fcgi_printf(c, "%sheadref=%s", sep, url->headref);
1069                 free(tmp);
1070                 if (r == -1)
1071                         return -1;
1072                 sep = "&";
1073         }
1074
1075         if (url->index_page != -1) {
1076                 if (fcgi_printf(c, "%sindex_page=%d", sep,
1077                     url->index_page) == -1)
1078                         return -1;
1079                 sep = "&";
1080         }
1081
1082         if (url->path) {
1083                 tmp = gotweb_urlencode(url->path);
1084                 if (tmp == NULL)
1085                         return -1;
1086                 r = fcgi_printf(c, "%spath=%s", sep, tmp);
1087                 free(tmp);
1088                 if (r == -1)
1089                         return -1;
1090                 sep = "&";
1091         }
1092
1093         if (url->page != -1) {
1094                 if (fcgi_printf(c, "%spage=%d", sep, url->page) == -1)
1095                         return -1;
1096                 sep = "&";
1097         }
1098
1099         return 0;
1100 }
1101
1102 int
1103 gotweb_render_absolute_url(struct request *c, struct gotweb_url *url)
1104 {
1105         struct template *tp = c->tp;
1106         const char      *proto = c->https ? "https" : "http";
1107
1108         if (fcgi_puts(tp, proto) == -1 ||
1109             fcgi_puts(tp, "://") == -1 ||
1110             tp_htmlescape(tp, c->server_name) == -1 ||
1111             tp_htmlescape(tp, c->document_uri) == -1)
1112                 return -1;
1113
1114         return gotweb_render_url(c, url);
1115 }
1116
1117 static struct got_repository *
1118 find_cached_repo(struct server *srv, const char *path)
1119 {
1120         int i;
1121
1122         for (i = 0; i < srv->ncached_repos; i++) {
1123                 if (strcmp(srv->cached_repos[i].path, path) == 0)
1124                         return srv->cached_repos[i].repo;
1125         }
1126
1127         return NULL;
1128 }
1129
1130 static const struct got_error *
1131 cache_repo(struct got_repository **new, struct server *srv,
1132     struct repo_dir *repo_dir, struct socket *sock)
1133 {
1134         const struct got_error *error = NULL;
1135         struct got_repository *repo;
1136         struct cached_repo *cr;
1137         int evicted = 0;
1138
1139         if (srv->ncached_repos >= GOTWEBD_REPO_CACHESIZE) {
1140                 cr = &srv->cached_repos[srv->ncached_repos - 1];
1141                 error = got_repo_close(cr->repo);
1142                 memset(cr, 0, sizeof(*cr));
1143                 srv->ncached_repos--;
1144                 if (error)
1145                         return error;
1146                 memmove(&srv->cached_repos[1], &srv->cached_repos[0],
1147                     srv->ncached_repos * sizeof(srv->cached_repos[0]));
1148                 cr = &srv->cached_repos[0];
1149                 evicted = 1;
1150         } else {
1151                 cr = &srv->cached_repos[srv->ncached_repos];
1152         }
1153
1154         error = got_repo_open(&repo, repo_dir->path, NULL, sock->pack_fds);
1155         if (error) {
1156                 if (evicted) {
1157                         memmove(&srv->cached_repos[0], &srv->cached_repos[1],
1158                             srv->ncached_repos * sizeof(srv->cached_repos[0]));
1159                 }
1160                 return error;
1161         }
1162
1163         if (strlcpy(cr->path, repo_dir->path, sizeof(cr->path))
1164             >= sizeof(cr->path)) {
1165                 if (evicted) {
1166                         memmove(&srv->cached_repos[0], &srv->cached_repos[1],
1167                             srv->ncached_repos * sizeof(srv->cached_repos[0]));
1168                 }
1169                 return got_error(GOT_ERR_NO_SPACE);
1170         }
1171
1172         cr->repo = repo;
1173         srv->ncached_repos++;
1174         *new = repo;
1175         return NULL;
1176 }
1177
1178 static const struct got_error *
1179 gotweb_load_got_path(struct request *c, struct repo_dir *repo_dir)
1180 {
1181         const struct got_error *error = NULL;
1182         struct socket *sock = c->sock;
1183         struct server *srv = c->srv;
1184         struct transport *t = c->t;
1185         struct got_repository *repo = NULL;
1186         DIR *dt;
1187         char *dir_test;
1188
1189         if (asprintf(&dir_test, "%s/%s/%s", srv->repos_path, repo_dir->name,
1190             GOTWEB_GIT_DIR) == -1)
1191                 return got_error_from_errno("asprintf");
1192
1193         dt = opendir(dir_test);
1194         if (dt == NULL) {
1195                 free(dir_test);
1196         } else {
1197                 repo_dir->path = dir_test;
1198                 dir_test = NULL;
1199                 goto done;
1200         }
1201
1202         if (asprintf(&dir_test, "%s/%s", srv->repos_path,
1203             repo_dir->name) == -1)
1204                 return got_error_from_errno("asprintf");
1205
1206         dt = opendir(dir_test);
1207         if (dt == NULL) {
1208                 error = got_error_path(repo_dir->name, GOT_ERR_NOT_GIT_REPO);
1209                 goto err;
1210         } else {
1211                 repo_dir->path = dir_test;
1212                 dir_test = NULL;
1213         }
1214
1215 done:
1216         if (srv->respect_exportok &&
1217             faccessat(dirfd(dt), "git-daemon-export-ok", F_OK, 0) == -1) {
1218                 error = got_error_path(repo_dir->name, GOT_ERR_NOT_GIT_REPO);
1219                 goto err;
1220         }
1221
1222         repo = find_cached_repo(srv, repo_dir->path);
1223         if (repo == NULL) {
1224                 error = cache_repo(&repo, srv, repo_dir, sock);
1225                 if (error)
1226                         goto err;
1227         }
1228         t->repo = repo;
1229         error = gotweb_get_repo_description(&repo_dir->description, srv,
1230             repo_dir->path, dirfd(dt));
1231         if (error)
1232                 goto err;
1233         error = got_get_repo_owner(&repo_dir->owner, c);
1234         if (error)
1235                 goto err;
1236         error = got_get_repo_age(&repo_dir->age, c, NULL);
1237         if (error)
1238                 goto err;
1239         error = gotweb_get_clone_url(&repo_dir->url, srv, repo_dir->path,
1240             dirfd(dt));
1241 err:
1242         free(dir_test);
1243         if (dt != NULL && closedir(dt) == EOF && error == NULL)
1244                 error = got_error_from_errno("closedir");
1245         return error;
1246 }
1247
1248 static const struct got_error *
1249 gotweb_init_repo_dir(struct repo_dir **repo_dir, const char *dir)
1250 {
1251         const struct got_error *error;
1252
1253         *repo_dir = calloc(1, sizeof(**repo_dir));
1254         if (*repo_dir == NULL)
1255                 return got_error_from_errno("calloc");
1256
1257         if (asprintf(&(*repo_dir)->name, "%s", dir) == -1) {
1258                 error = got_error_from_errno("asprintf");
1259                 free(*repo_dir);
1260                 *repo_dir = NULL;
1261                 return error;
1262         }
1263         (*repo_dir)->owner = NULL;
1264         (*repo_dir)->description = NULL;
1265         (*repo_dir)->url = NULL;
1266         (*repo_dir)->path = NULL;
1267
1268         return NULL;
1269 }
1270
1271 static const struct got_error *
1272 gotweb_get_repo_description(char **description, struct server *srv,
1273     const char *dirpath, int dir)
1274 {
1275         const struct got_error *error = NULL;
1276         struct stat sb;
1277         int fd = -1;
1278         off_t len;
1279
1280         *description = NULL;
1281         if (srv->show_repo_description == 0)
1282                 return NULL;
1283
1284         fd = openat(dir, "description", O_RDONLY);
1285         if (fd == -1) {
1286                 if (errno != ENOENT && errno != EACCES) {
1287                         error = got_error_from_errno_fmt("openat %s/%s",
1288                             dirpath, "description");
1289                 }
1290                 goto done;
1291         }
1292
1293         if (fstat(fd, &sb) == -1) {
1294                 error = got_error_from_errno_fmt("fstat %s/%s",
1295                     dirpath, "description");
1296                 goto done;
1297         }
1298
1299         len = sb.st_size;
1300         if (len > GOTWEBD_MAXDESCRSZ - 1)
1301                 len = GOTWEBD_MAXDESCRSZ - 1;
1302
1303         *description = calloc(len + 1, sizeof(**description));
1304         if (*description == NULL) {
1305                 error = got_error_from_errno("calloc");
1306                 goto done;
1307         }
1308
1309         if (read(fd, *description, len) == -1)
1310                 error = got_error_from_errno("read");
1311 done:
1312         if (fd != -1 && close(fd) == -1 && error == NULL)
1313                 error = got_error_from_errno("close");
1314         return error;
1315 }
1316
1317 static const struct got_error *
1318 gotweb_get_clone_url(char **url, struct server *srv, const char *dirpath,
1319     int dir)
1320 {
1321         const struct got_error *error = NULL;
1322         struct stat sb;
1323         int fd = -1;
1324         off_t len;
1325
1326         *url = NULL;
1327         if (srv->show_repo_cloneurl == 0)
1328                 return NULL;
1329
1330         fd = openat(dir, "cloneurl", O_RDONLY);
1331         if (fd == -1) {
1332                 if (errno != ENOENT && errno != EACCES) {
1333                         error = got_error_from_errno_fmt("openat %s/%s",
1334                             dirpath, "cloneurl");
1335                 }
1336                 goto done;
1337         }
1338
1339         if (fstat(fd, &sb) == -1) {
1340                 error = got_error_from_errno_fmt("fstat %s/%s",
1341                     dirpath, "cloneurl");
1342                 goto done;
1343         }
1344
1345         len = sb.st_size;
1346         if (len > GOTWEBD_MAXCLONEURLSZ - 1)
1347                 len = GOTWEBD_MAXCLONEURLSZ - 1;
1348
1349         *url = calloc(len + 1, sizeof(**url));
1350         if (*url == NULL) {
1351                 error = got_error_from_errno("calloc");
1352                 goto done;
1353         }
1354
1355         if (read(fd, *url, len) == -1)
1356                 error = got_error_from_errno("read");
1357 done:
1358         if (fd != -1 && close(fd) == -1 && error == NULL)
1359                 error = got_error_from_errno("close");
1360         return error;
1361 }
1362
1363 int
1364 gotweb_render_age(struct template *tp, time_t committer_time, int ref_tm)
1365 {
1366         struct request *c = tp->tp_arg;
1367         struct tm tm;
1368         long long diff_time;
1369         const char *years = "years ago", *months = "months ago";
1370         const char *weeks = "weeks ago", *days = "days ago";
1371         const char *hours = "hours ago",  *minutes = "minutes ago";
1372         const char *seconds = "seconds ago", *now = "right now";
1373         char *s;
1374         char datebuf[64];
1375         size_t r;
1376
1377         switch (ref_tm) {
1378         case TM_DIFF:
1379                 diff_time = time(NULL) - committer_time;
1380                 if (diff_time > 60 * 60 * 24 * 365 * 2) {
1381                         if (fcgi_printf(c, "%lld %s",
1382                             (diff_time / 60 / 60 / 24 / 365), years) == -1)
1383                                 return -1;
1384                 } else if (diff_time > 60 * 60 * 24 * (365 / 12) * 2) {
1385                         if (fcgi_printf(c, "%lld %s",
1386                             (diff_time / 60 / 60 / 24 / (365 / 12)),
1387                             months) == -1)
1388                                 return -1;
1389                 } else if (diff_time > 60 * 60 * 24 * 7 * 2) {
1390                         if (fcgi_printf(c, "%lld %s",
1391                             (diff_time / 60 / 60 / 24 / 7), weeks) == -1)
1392                                 return -1;
1393                 } else if (diff_time > 60 * 60 * 24 * 2) {
1394                         if (fcgi_printf(c, "%lld %s",
1395                             (diff_time / 60 / 60 / 24), days) == -1)
1396                                 return -1;
1397                 } else if (diff_time > 60 * 60 * 2) {
1398                         if (fcgi_printf(c, "%lld %s",
1399                             (diff_time / 60 / 60), hours) == -1)
1400                                 return -1;
1401                 } else if (diff_time > 60 * 2) {
1402                         if (fcgi_printf(c, "%lld %s", (diff_time / 60),
1403                             minutes) == -1)
1404                                 return -1;
1405                 } else if (diff_time > 2) {
1406                         if (fcgi_printf(c, "%lld %s", diff_time,
1407                             seconds) == -1)
1408                                 return -1;
1409                 } else {
1410                         if (fcgi_puts(tp, now) == -1)
1411                                 return -1;
1412                 }
1413                 break;
1414         case TM_LONG:
1415                 if (gmtime_r(&committer_time, &tm) == NULL)
1416                         return -1;
1417
1418                 s = asctime_r(&tm, datebuf);
1419                 if (s == NULL)
1420                         return -1;
1421
1422                 if (fcgi_puts(tp, datebuf) == -1 ||
1423                     fcgi_puts(tp, " UTC") == -1)
1424                         return -1;
1425                 break;
1426         case TM_RFC822:
1427                 if (gmtime_r(&committer_time, &tm) == NULL)
1428                         return -1;
1429
1430                 r = strftime(datebuf, sizeof(datebuf),
1431                     "%a, %d %b %Y %H:%M:%S GMT", &tm);
1432                 if (r == 0)
1433                         return -1;
1434
1435                 if (fcgi_puts(tp, datebuf) == -1)
1436                         return -1;
1437                 break;
1438         }
1439         return 0;
1440 }