ui-shared.c

   1 /* ui-shared.c: common web output functions
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "ui-shared.h"
  11 #include "cmd.h"
  12 #include "html.h"
  13
  14 static const char cgit_doctype[] =
  15 "<!DOCTYPE html>\n";
  16
  17 static char *http_date(time_t t)
  18 {
  19         static char day[][4] =
  20                 {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  21         static char month[][4] =
  22                 {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
  23                  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  24         struct tm *tm = gmtime(&t);
  25         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
  26                    tm->tm_mday, month[tm->tm_mon], 1900 + tm->tm_year,
  27                    tm->tm_hour, tm->tm_min, tm->tm_sec);
  28 }
  29
  30 void cgit_print_error(const char *fmt, ...)
  31 {
  32         va_list ap;
  33         va_start(ap, fmt);
  34         cgit_vprint_error(fmt, ap);
  35         va_end(ap);
  36 }
  37
  38 void cgit_vprint_error(const char *fmt, va_list ap)
  39 {
  40         va_list cp;
  41         html("<div class='error'>");
  42         va_copy(cp, ap);
  43         html_vtxtf(fmt, cp);
  44         va_end(cp);
  45         html("</div>\n");
  46 }
  47
  48 const char *cgit_httpscheme(void)
  49 {
  50         if (ctx.env.https && !strcmp(ctx.env.https, "on"))
  51                 return "https://";
  52         else
  53                 return "http://";
  54 }
  55
  56 char *cgit_hosturl(void)
  57 {
  58         if (ctx.env.http_host)
  59                 return xstrdup(ctx.env.http_host);
  60         if (!ctx.env.server_name)
  61                 return NULL;
  62         if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
  63                 return xstrdup(ctx.env.server_name);
  64         return fmtalloc("%s:%s", ctx.env.server_name, ctx.env.server_port);
  65 }
  66
  67 char *cgit_currenturl(void)
  68 {
  69         if (!ctx.qry.url)
  70                 return xstrdup(cgit_rooturl());
  71         const char *root = cgit_rooturl();
  72         size_t len = strlen(root);
  73         if (len && root[len - 1] == '/')
  74                 return fmtalloc("%s%s", root, ctx.qry.url);
  75         return fmtalloc("%s/%s", root, ctx.qry.url);
  76 }
  77
  78 const char *cgit_rooturl(void)
  79 {
  80         if (ctx.cfg.virtual_root)
  81                 return ctx.cfg.virtual_root;
  82         else
  83                 return ctx.cfg.script_name;
  84 }
  85
  86 const char *cgit_loginurl(void)
  87 {
  88         static const char *login_url;
  89         if (!login_url)
  90                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
  91         return login_url;
  92 }
  93
  94 char *cgit_repourl(const char *reponame)
  95 {
  96         if (ctx.cfg.virtual_root)
  97                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
  98         else
  99                 return fmtalloc("?r=%s", reponame);
 100 }
 101
 102 char *cgit_fileurl(const char *reponame, const char *pagename,
 103                    const char *filename, const char *query)
 104 {
 105         struct strbuf sb = STRBUF_INIT;
 106         char *delim;
 107
 108         if (ctx.cfg.virtual_root) {
 109                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 110                             pagename, (filename ? filename:""));
 111                 delim = "?";
 112         } else {
 113                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 114                             (filename ? filename : ""));
 115                 delim = "&amp;";
 116         }
 117         if (query)
 118                 strbuf_addf(&sb, "%s%s", delim, query);
 119         return strbuf_detach(&sb, NULL);
 120 }
 121
 122 char *cgit_pageurl(const char *reponame, const char *pagename,
 123                    const char *query)
 124 {
 125         return cgit_fileurl(reponame, pagename, NULL, query);
 126 }
 127
 128 const char *cgit_repobasename(const char *reponame)
 129 {
 130         /* I assume we don't need to store more than one repo basename */
 131         static char rvbuf[1024];
 132         int p;
 133         const char *rv;
 134         strncpy(rvbuf, reponame, sizeof(rvbuf));
 135         if (rvbuf[sizeof(rvbuf)-1])
 136                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 137         p = strlen(rvbuf)-1;
 138         /* strip trailing slashes */
 139         while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
 140         /* strip trailing .git */
 141         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 142                 p -= 3; rvbuf[p--] = 0;
 143         }
 144         /* strip more trailing slashes if any */
 145         while ( p && rvbuf[p] == '/') rvbuf[p--] = 0;
 146         /* find last slash in the remaining string */
 147         rv = strrchr(rvbuf,'/');
 148         if (rv)
 149                 return ++rv;
 150         return rvbuf;
 151 }
 152
 153 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 154 {
 155         char *delim = "?";
 156
 157         if (always_root || page)
 158                 html_attr(cgit_rooturl());
 159         else {
 160                 char *currenturl = cgit_currenturl();
 161                 html_attr(currenturl);
 162                 free(currenturl);
 163         }
 164
 165         if (page) {
 166                 htmlf("?p=%s", page);
 167                 delim = "&amp;";
 168         }
 169         if (search) {
 170                 html(delim);
 171                 html("q=");
 172                 html_attr(search);
 173                 delim = "&amp;";
 174         }
 175         if (sort) {
 176                 html(delim);
 177                 html("s=");
 178                 html_attr(sort);
 179                 delim = "&amp;";
 180         }
 181         if (ofs) {
 182                 html(delim);
 183                 htmlf("ofs=%d", ofs);
 184         }
 185 }
 186
 187 static void site_link(const char *page, const char *name, const char *title,
 188                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 189 {
 190         html("<a");
 191         if (title) {
 192                 html(" title='");
 193                 html_attr(title);
 194                 html("'");
 195         }
 196         if (class) {
 197                 html(" class='");
 198                 html_attr(class);
 199                 html("'");
 200         }
 201         html(" href='");
 202         site_url(page, search, sort, ofs, always_root);
 203         html("'>");
 204         html_txt(name);
 205         html("</a>");
 206 }
 207
 208 void cgit_index_link(const char *name, const char *title, const char *class,
 209                      const char *pattern, const char *sort, int ofs, int always_root)
 210 {
 211         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 212 }
 213
 214 static char *repolink(const char *title, const char *class, const char *page,
 215                       const char *head, const char *path)
 216 {
 217         char *delim = "?";
 218
 219         html("<a");
 220         if (title) {
 221                 html(" title='");
 222                 html_attr(title);
 223                 html("'");
 224         }
 225         if (class) {
 226                 html(" class='");
 227                 html_attr(class);
 228                 html("'");
 229         }
 230         html(" href='");
 231         if (ctx.cfg.virtual_root) {
 232                 html_url_path(ctx.cfg.virtual_root);
 233                 html_url_path(ctx.repo->url);
 234                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 235                         html("/");
 236                 if (page) {
 237                         html_url_path(page);
 238                         html("/");
 239                         if (path)
 240                                 html_url_path(path);
 241                 }
 242         } else {
 243                 html_url_path(ctx.cfg.script_name);
 244                 html("?url=");
 245                 html_url_arg(ctx.repo->url);
 246                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 247                         html("/");
 248                 if (page) {
 249                         html_url_arg(page);
 250                         html("/");
 251                         if (path)
 252                                 html_url_arg(path);
 253                 }
 254                 delim = "&amp;";
 255         }
 256         if (head && strcmp(head, ctx.repo->defbranch)) {
 257                 html(delim);
 258                 html("h=");
 259                 html_url_arg(head);
 260                 delim = "&amp;";
 261         }
 262         return fmt("%s", delim);
 263 }
 264
 265 static void reporevlink(const char *page, const char *name, const char *title,
 266                         const char *class, const char *head, const char *rev,
 267                         const char *path)
 268 {
 269         char *delim;
 270
 271         delim = repolink(title, class, page, head, path);
 272         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 273                 html(delim);
 274                 html("id=");
 275                 html_url_arg(rev);
 276         }
 277         html("'>");
 278         html_txt(name);
 279         html("</a>");
 280 }
 281
 282 void cgit_summary_link(const char *name, const char *title, const char *class,
 283                        const char *head)
 284 {
 285         reporevlink(NULL, name, title, class, head, NULL, NULL);
 286 }
 287
 288 void cgit_tag_link(const char *name, const char *title, const char *class,
 289                    const char *tag)
 290 {
 291         reporevlink("tag", name, title, class, tag, NULL, NULL);
 292 }
 293
 294 void cgit_tree_link(const char *name, const char *title, const char *class,
 295                     const char *head, const char *rev, const char *path)
 296 {
 297         reporevlink("tree", name, title, class, head, rev, path);
 298 }
 299
 300 void cgit_plain_link(const char *name, const char *title, const char *class,
 301                      const char *head, const char *rev, const char *path)
 302 {
 303         reporevlink("plain", name, title, class, head, rev, path);
 304 }
 305
 306 void cgit_log_link(const char *name, const char *title, const char *class,
 307                    const char *head, const char *rev, const char *path,
 308                    int ofs, const char *grep, const char *pattern, int showmsg,
 309                    int follow)
 310 {
 311         char *delim;
 312
 313         delim = repolink(title, class, "log", head, path);
 314         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 315                 html(delim);
 316                 html("id=");
 317                 html_url_arg(rev);
 318                 delim = "&amp;";
 319         }
 320         if (grep && pattern) {
 321                 html(delim);
 322                 html("qt=");
 323                 html_url_arg(grep);
 324                 delim = "&amp;";
 325                 html(delim);
 326                 html("q=");
 327                 html_url_arg(pattern);
 328         }
 329         if (ofs > 0) {
 330                 html(delim);
 331                 html("ofs=");
 332                 htmlf("%d", ofs);
 333                 delim = "&amp;";
 334         }
 335         if (showmsg) {
 336                 html(delim);
 337                 html("showmsg=1");
 338                 delim = "&amp;";
 339         }
 340         if (follow) {
 341                 html(delim);
 342                 html("follow=1");
 343         }
 344         html("'>");
 345         html_txt(name);
 346         html("</a>");
 347 }
 348
 349 void cgit_commit_link(char *name, const char *title, const char *class,
 350                       const char *head, const char *rev, const char *path)
 351 {
 352         if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 353                 name[ctx.cfg.max_msg_len] = '\0';
 354                 name[ctx.cfg.max_msg_len - 1] = '.';
 355                 name[ctx.cfg.max_msg_len - 2] = '.';
 356                 name[ctx.cfg.max_msg_len - 3] = '.';
 357         }
 358
 359         char *delim;
 360
 361         delim = repolink(title, class, "commit", head, path);
 362         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 363                 html(delim);
 364                 html("id=");
 365                 html_url_arg(rev);
 366                 delim = "&amp;";
 367         }
 368         if (ctx.qry.difftype) {
 369                 html(delim);
 370                 htmlf("dt=%d", ctx.qry.difftype);
 371                 delim = "&amp;";
 372         }
 373         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 374                 html(delim);
 375                 html("context=");
 376                 htmlf("%d", ctx.qry.context);
 377                 delim = "&amp;";
 378         }
 379         if (ctx.qry.ignorews) {
 380                 html(delim);
 381                 html("ignorews=1");
 382                 delim = "&amp;";
 383         }
 384         if (ctx.qry.follow) {
 385                 html(delim);
 386                 html("follow=1");
 387         }
 388         html("'>");
 389         if (name[0] != '\0')
 390                 html_txt(name);
 391         else
 392                 html_txt("(no commit message)");
 393         html("</a>");
 394 }
 395
 396 void cgit_refs_link(const char *name, const char *title, const char *class,
 397                     const char *head, const char *rev, const char *path)
 398 {
 399         reporevlink("refs", name, title, class, head, rev, path);
 400 }
 401
 402 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 403                         const char *head, const char *rev,
 404                         const char *archivename)
 405 {
 406         reporevlink("snapshot", name, title, class, head, rev, archivename);
 407 }
 408
 409 void cgit_diff_link(const char *name, const char *title, const char *class,
 410                     const char *head, const char *new_rev, const char *old_rev,
 411                     const char *path)
 412 {
 413         char *delim;
 414
 415         delim = repolink(title, class, "diff", head, path);
 416         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 417                 html(delim);
 418                 html("id=");
 419                 html_url_arg(new_rev);
 420                 delim = "&amp;";
 421         }
 422         if (old_rev) {
 423                 html(delim);
 424                 html("id2=");
 425                 html_url_arg(old_rev);
 426                 delim = "&amp;";
 427         }
 428         if (ctx.qry.difftype) {
 429                 html(delim);
 430                 htmlf("dt=%d", ctx.qry.difftype);
 431                 delim = "&amp;";
 432         }
 433         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 434                 html(delim);
 435                 html("context=");
 436                 htmlf("%d", ctx.qry.context);
 437                 delim = "&amp;";
 438         }
 439         if (ctx.qry.ignorews) {
 440                 html(delim);
 441                 html("ignorews=1");
 442                 delim = "&amp;";
 443         }
 444         if (ctx.qry.follow) {
 445                 html(delim);
 446                 html("follow=1");
 447         }
 448         html("'>");
 449         html_txt(name);
 450         html("</a>");
 451 }
 452
 453 void cgit_patch_link(const char *name, const char *title, const char *class,
 454                      const char *head, const char *rev, const char *path)
 455 {
 456         reporevlink("patch", name, title, class, head, rev, path);
 457 }
 458
 459 void cgit_stats_link(const char *name, const char *title, const char *class,
 460                      const char *head, const char *path)
 461 {
 462         reporevlink("stats", name, title, class, head, NULL, path);
 463 }
 464
 465 static void cgit_self_link(char *name, const char *title, const char *class)
 466 {
 467         if (!strcmp(ctx.qry.page, "repolist"))
 468                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 469                                 ctx.qry.ofs, 1);
 470         else if (!strcmp(ctx.qry.page, "summary"))
 471                 cgit_summary_link(name, title, class, ctx.qry.head);
 472         else if (!strcmp(ctx.qry.page, "tag"))
 473                 cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
 474                                ctx.qry.sha1 : ctx.qry.head);
 475         else if (!strcmp(ctx.qry.page, "tree"))
 476                 cgit_tree_link(name, title, class, ctx.qry.head,
 477                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 478                                ctx.qry.path);
 479         else if (!strcmp(ctx.qry.page, "plain"))
 480                 cgit_plain_link(name, title, class, ctx.qry.head,
 481                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 482                                 ctx.qry.path);
 483         else if (!strcmp(ctx.qry.page, "log"))
 484                 cgit_log_link(name, title, class, ctx.qry.head,
 485                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 486                               ctx.qry.path, ctx.qry.ofs,
 487                               ctx.qry.grep, ctx.qry.search,
 488                               ctx.qry.showmsg, ctx.qry.follow);
 489         else if (!strcmp(ctx.qry.page, "commit"))
 490                 cgit_commit_link(name, title, class, ctx.qry.head,
 491                                  ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 492                                  ctx.qry.path);
 493         else if (!strcmp(ctx.qry.page, "patch"))
 494                 cgit_patch_link(name, title, class, ctx.qry.head,
 495                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 496                                 ctx.qry.path);
 497         else if (!strcmp(ctx.qry.page, "refs"))
 498                 cgit_refs_link(name, title, class, ctx.qry.head,
 499                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 500                                ctx.qry.path);
 501         else if (!strcmp(ctx.qry.page, "snapshot"))
 502                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 503                                    ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 504                                    ctx.qry.path);
 505         else if (!strcmp(ctx.qry.page, "diff"))
 506                 cgit_diff_link(name, title, class, ctx.qry.head,
 507                                ctx.qry.sha1, ctx.qry.sha2,
 508                                ctx.qry.path);
 509         else if (!strcmp(ctx.qry.page, "stats"))
 510                 cgit_stats_link(name, title, class, ctx.qry.head,
 511                                 ctx.qry.path);
 512         else {
 513                 /* Don't known how to make link for this page */
 514                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 515                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 516                 html_txt(ctx.qry.page);
 517                 html("' -->");
 518                 html_txt(name);
 519                 html("</a>");
 520         }
 521 }
 522
 523 void cgit_object_link(struct object *obj)
 524 {
 525         char *page, *shortrev, *fullrev, *name;
 526
 527         fullrev = oid_to_hex(&obj->oid);
 528         shortrev = xstrdup(fullrev);
 529         shortrev[10] = '\0';
 530         if (obj->type == OBJ_COMMIT) {
 531                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 532                                  ctx.qry.head, fullrev, NULL);
 533                 return;
 534         } else if (obj->type == OBJ_TREE)
 535                 page = "tree";
 536         else if (obj->type == OBJ_TAG)
 537                 page = "tag";
 538         else
 539                 page = "blob";
 540         name = fmt("%s %s...", typename(obj->type), shortrev);
 541         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 542 }
 543
 544 static struct string_list_item *lookup_path(struct string_list *list,
 545                                             const char *path)
 546 {
 547         struct string_list_item *item;
 548
 549         while (path && path[0]) {
 550                 if ((item = string_list_lookup(list, path)))
 551                         return item;
 552                 if (!(path = strchr(path, '/')))
 553                         break;
 554                 path++;
 555         }
 556         return NULL;
 557 }
 558
 559 void cgit_submodule_link(const char *class, char *path, const char *rev)
 560 {
 561         struct string_list *list;
 562         struct string_list_item *item;
 563         char tail, *dir;
 564         size_t len;
 565
 566         len = 0;
 567         tail = 0;
 568         list = &ctx.repo->submodules;
 569         item = lookup_path(list, path);
 570         if (!item) {
 571                 len = strlen(path);
 572                 tail = path[len - 1];
 573                 if (tail == '/') {
 574                         path[len - 1] = 0;
 575                         item = lookup_path(list, path);
 576                 }
 577         }
 578         if (item || ctx.repo->module_link) {
 579                 html("<a ");
 580                 if (class)
 581                         htmlf("class='%s' ", class);
 582                 html("href='");
 583                 if (item) {
 584                         html_attrf(item->util, rev);
 585                 } else {
 586                         dir = strrchr(path, '/');
 587                         if (dir)
 588                                 dir++;
 589                         else
 590                                 dir = path;
 591                         html_attrf(ctx.repo->module_link, dir, rev);
 592                 }
 593                 html("'>");
 594                 html_txt(path);
 595                 html("</a>");
 596         } else {
 597                 html("<span");
 598                 if (class)
 599                         htmlf(" class='%s'", class);
 600                 html(">");
 601                 html_txt(path);
 602                 html("</span>");
 603         }
 604         html_txtf(" @ %.7s", rev);
 605         if (item && tail)
 606                 path[len - 1] = tail;
 607 }
 608
 609 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 610 {
 611         static struct date_mode mode;
 612         mode.type = type;
 613         mode.local = ctx.cfg.local_time;
 614         return &mode;
 615 }
 616
 617 static void print_rel_date(time_t t, int tz, double value,
 618         const char *class, const char *suffix)
 619 {
 620         htmlf("<span class='%s' title='", class);
 621         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 622         htmlf("'>%.0f %s</span>", value, suffix);
 623 }
 624
 625 void cgit_print_age(time_t t, int tz, time_t max_relative)
 626 {
 627         time_t now, secs;
 628
 629         if (!t)
 630                 return;
 631         time(&now);
 632         secs = now - t;
 633         if (secs < 0)
 634                 secs = 0;
 635
 636         if (secs > max_relative && max_relative >= 0) {
 637                 html("<span title='");
 638                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 639                 html("'>");
 640                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 641                 html("</span>");
 642                 return;
 643         }
 644
 645         if (secs < TM_HOUR * 2) {
 646                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 647                 return;
 648         }
 649         if (secs < TM_DAY * 2) {
 650                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 651                 return;
 652         }
 653         if (secs < TM_WEEK * 2) {
 654                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 655                 return;
 656         }
 657         if (secs < TM_MONTH * 2) {
 658                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 659                 return;
 660         }
 661         if (secs < TM_YEAR * 2) {
 662                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 663                 return;
 664         }
 665         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 666 }
 667
 668 void cgit_print_http_headers(void)
 669 {
 670         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 671                 return;
 672
 673         if (ctx.page.status)
 674                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 675         if (ctx.page.mimetype && ctx.page.charset)
 676                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 677                       ctx.page.charset);
 678         else if (ctx.page.mimetype)
 679                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 680         if (ctx.page.size)
 681                 htmlf("Content-Length: %zd\n", ctx.page.size);
 682         if (ctx.page.filename) {
 683                 html("Content-Disposition: inline; filename=\"");
 684                 html_header_arg_in_quotes(ctx.page.filename);
 685                 html("\"\n");
 686         }
 687         if (!ctx.env.authenticated)
 688                 html("Cache-Control: no-cache, no-store\n");
 689         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 690         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 691         if (ctx.page.etag)
 692                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 693         html("\n");
 694         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 695                 exit(0);
 696 }
 697
 698 void cgit_redirect(const char *url, bool permanent)
 699 {
 700         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 701         html("Location: ");
 702         html_url_path(url);
 703         html("\n\n");
 704 }
 705
 706 static void print_rel_vcs_link(const char *url)
 707 {
 708         html("<link rel='vcs-git' href='");
 709         html_attr(url);
 710         html("' title='");
 711         html_attr(ctx.repo->name);
 712         html(" Git repository'/>\n");
 713 }
 714
 715 void cgit_print_docstart(void)
 716 {
 717         if (ctx.cfg.embedded) {
 718                 if (ctx.cfg.header)
 719                         html_include(ctx.cfg.header);
 720                 return;
 721         }
 722
 723         char *host = cgit_hosturl();
 724         html(cgit_doctype);
 725         html("<html lang='en'>\n");
 726         html("<head>\n");
 727         html("<title>");
 728         html_txt(ctx.page.title);
 729         html("</title>\n");
 730         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 731         if (ctx.cfg.robots && *ctx.cfg.robots)
 732                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 733         html("<link rel='stylesheet' type='text/css' href='");
 734         html_attr(ctx.cfg.css);
 735         html("'/>\n");
 736         if (ctx.cfg.favicon) {
 737                 html("<link rel='shortcut icon' href='");
 738                 html_attr(ctx.cfg.favicon);
 739                 html("'/>\n");
 740         }
 741         if (host && ctx.repo && ctx.qry.head) {
 742                 char *fileurl;
 743                 struct strbuf sb = STRBUF_INIT;
 744                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 745
 746                 html("<link rel='alternate' title='Atom feed' href='");
 747                 html(cgit_httpscheme());
 748                 html_attr(host);
 749                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 750                                        sb.buf);
 751                 html_attr(fileurl);
 752                 html("' type='application/atom+xml'/>\n");
 753                 strbuf_release(&sb);
 754                 free(fileurl);
 755         }
 756         if (ctx.repo)
 757                 cgit_add_clone_urls(print_rel_vcs_link);
 758         if (ctx.cfg.head_include)
 759                 html_include(ctx.cfg.head_include);
 760         html("</head>\n");
 761         html("<body>\n");
 762         if (ctx.cfg.header)
 763                 html_include(ctx.cfg.header);
 764         free(host);
 765 }
 766
 767 void cgit_print_docend(void)
 768 {
 769         html("</div> <!-- class=content -->\n");
 770         if (ctx.cfg.embedded) {
 771                 html("</div> <!-- id=cgit -->\n");
 772                 if (ctx.cfg.footer)
 773                         html_include(ctx.cfg.footer);
 774                 return;
 775         }
 776         if (ctx.cfg.footer)
 777                 html_include(ctx.cfg.footer);
 778         else {
 779                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> at ",
 780                         cgit_version);
 781                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 782                 html("</div>\n");
 783         }
 784         html("</div> <!-- id=cgit -->\n");
 785         html("</body>\n</html>\n");
 786 }
 787
 788 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 789 {
 790         va_list ap;
 791         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 792         ctx.page.status = code;
 793         ctx.page.statusmsg = msg;
 794         cgit_print_layout_start();
 795         va_start(ap, fmt);
 796         cgit_vprint_error(fmt, ap);
 797         va_end(ap);
 798         cgit_print_layout_end();
 799 }
 800
 801 void cgit_print_layout_start(void)
 802 {
 803         cgit_print_http_headers();
 804         cgit_print_docstart();
 805         cgit_print_pageheader();
 806 }
 807
 808 void cgit_print_layout_end(void)
 809 {
 810         cgit_print_docend();
 811 }
 812
 813 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 814 {
 815         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 816         int i;
 817
 818         for (i = 0; url_list[i]; i++) {
 819                 strbuf_rtrim(url_list[i]);
 820                 if (url_list[i]->len == 0)
 821                         continue;
 822                 if (suffix && *suffix)
 823                         strbuf_addf(url_list[i], "/%s", suffix);
 824                 fn(url_list[i]->buf);
 825         }
 826
 827         strbuf_list_free(url_list);
 828 }
 829
 830 void cgit_add_clone_urls(void (*fn)(const char *))
 831 {
 832         if (ctx.repo->clone_url)
 833                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 834         else if (ctx.cfg.clone_prefix)
 835                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 836 }
 837
 838 static int print_branch_option(const char *refname, const struct object_id *oid,
 839                                int flags, void *cb_data)
 840 {
 841         char *name = (char *)refname;
 842         html_option(name, name, ctx.qry.head);
 843         return 0;
 844 }
 845
 846 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 847                                 const char *page)
 848 {
 849         if (!ctx.cfg.virtual_root) {
 850                 struct strbuf url = STRBUF_INIT;
 851
 852                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 853                 if (ctx.qry.vpath)
 854                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 855                 html_hidden("url", url.buf);
 856                 strbuf_release(&url);
 857         }
 858
 859         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 860             strcmp(ctx.qry.head, ctx.repo->defbranch))
 861                 html_hidden("h", ctx.qry.head);
 862
 863         if (ctx.qry.sha1)
 864                 html_hidden("id", ctx.qry.sha1);
 865         if (ctx.qry.sha2)
 866                 html_hidden("id2", ctx.qry.sha2);
 867         if (ctx.qry.showmsg)
 868                 html_hidden("showmsg", "1");
 869
 870         if (incl_search) {
 871                 if (ctx.qry.grep)
 872                         html_hidden("qt", ctx.qry.grep);
 873                 if (ctx.qry.search)
 874                         html_hidden("q", ctx.qry.search);
 875         }
 876 }
 877
 878 static const char *hc(const char *page)
 879 {
 880         if (!ctx.qry.page)
 881                 return NULL;
 882
 883         return strcmp(ctx.qry.page, page) ? NULL : "active";
 884 }
 885
 886 static void cgit_print_path_crumbs(char *path)
 887 {
 888         char *old_path = ctx.qry.path;
 889         char *p = path, *q, *end = path + strlen(path);
 890
 891         ctx.qry.path = NULL;
 892         cgit_self_link("root", NULL, NULL);
 893         ctx.qry.path = p = path;
 894         while (p < end) {
 895                 if (!(q = strchr(p, '/')))
 896                         q = end;
 897                 *q = '\0';
 898                 html_txt("/");
 899                 cgit_self_link(p, NULL, NULL);
 900                 if (q < end)
 901                         *q = '/';
 902                 p = q + 1;
 903         }
 904         ctx.qry.path = old_path;
 905 }
 906
 907 static void print_header(void)
 908 {
 909         char *logo = NULL, *logo_link = NULL;
 910
 911         html("<table id='header'>\n");
 912         html("<tr>\n");
 913
 914         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 915                 logo = ctx.repo->logo;
 916         else
 917                 logo = ctx.cfg.logo;
 918         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 919                 logo_link = ctx.repo->logo_link;
 920         else
 921                 logo_link = ctx.cfg.logo_link;
 922         if (logo && *logo) {
 923                 html("<td class='logo' rowspan='2'><a href='");
 924                 if (logo_link && *logo_link)
 925                         html_attr(logo_link);
 926                 else
 927                         html_attr(cgit_rooturl());
 928                 html("'><img src='");
 929                 html_attr(logo);
 930                 html("' alt='cgit logo'/></a></td>\n");
 931         }
 932
 933         html("<td class='main'>");
 934         if (ctx.repo) {
 935                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 936                 html(" : ");
 937                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 938                 if (ctx.env.authenticated) {
 939                         html("</td><td class='form'>");
 940                         html("<form method='get'>\n");
 941                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
 942                         html("<select name='h' onchange='this.form.submit();'>\n");
 943                         for_each_branch_ref(print_branch_option, ctx.qry.head);
 944                         if (ctx.repo->enable_remote_branches)
 945                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
 946                         html("</select> ");
 947                         html("<input type='submit' value='switch'/>");
 948                         html("</form>");
 949                 }
 950         } else
 951                 html_txt(ctx.cfg.root_title);
 952         html("</td></tr>\n");
 953
 954         html("<tr><td class='sub'>");
 955         if (ctx.repo) {
 956                 html_txt(ctx.repo->desc);
 957                 html("</td><td class='sub right'>");
 958                 html_txt(ctx.repo->owner);
 959         } else {
 960                 if (ctx.cfg.root_desc)
 961                         html_txt(ctx.cfg.root_desc);
 962                 else if (ctx.cfg.index_info)
 963                         html_include(ctx.cfg.index_info);
 964         }
 965         html("</td></tr></table>\n");
 966 }
 967
 968 void cgit_print_pageheader(void)
 969 {
 970         html("<div id='cgit'>");
 971         if (!ctx.env.authenticated || !ctx.cfg.noheader)
 972                 print_header();
 973
 974         html("<table class='tabs'><tr><td>\n");
 975         if (ctx.env.authenticated && ctx.repo) {
 976                 if (ctx.repo->readme.nr)
 977                         reporevlink("about", "about", NULL,
 978                                     hc("about"), ctx.qry.head, NULL,
 979                                     NULL);
 980                 cgit_summary_link("summary", NULL, hc("summary"),
 981                                   ctx.qry.head);
 982                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
 983                                ctx.qry.sha1, NULL);
 984                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
 985                               NULL, ctx.qry.vpath, 0, NULL, NULL,
 986                               ctx.qry.showmsg, ctx.qry.follow);
 987                 cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
 988                                ctx.qry.sha1, ctx.qry.vpath);
 989                 cgit_commit_link("commit", NULL, hc("commit"),
 990                                  ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
 991                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
 992                                ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
 993                 if (ctx.repo->max_stats)
 994                         cgit_stats_link("stats", NULL, hc("stats"),
 995                                         ctx.qry.head, ctx.qry.vpath);
 996                 if (ctx.repo->homepage) {
 997                         html("<a href='");
 998                         html_attr(ctx.repo->homepage);
 999                         html("'>homepage</a>");
1000                 }
1001                 html("</td><td class='form'>");
1002                 html("<form class='right' method='get' action='");
1003                 if (ctx.cfg.virtual_root) {
1004                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1005                                                    ctx.qry.vpath, NULL);
1006                         html_url_path(fileurl);
1007                         free(fileurl);
1008                 }
1009                 html("'>\n");
1010                 cgit_add_hidden_formfields(1, 0, "log");
1011                 html("<select name='qt'>\n");
1012                 html_option("grep", "log msg", ctx.qry.grep);
1013                 html_option("author", "author", ctx.qry.grep);
1014                 html_option("committer", "committer", ctx.qry.grep);
1015                 html_option("range", "range", ctx.qry.grep);
1016                 html("</select>\n");
1017                 html("<input class='txt' type='text' size='10' name='q' value='");
1018                 html_attr(ctx.qry.search);
1019                 html("'/>\n");
1020                 html("<input type='submit' value='search'/>\n");
1021                 html("</form>\n");
1022         } else if (ctx.env.authenticated) {
1023                 char *currenturl = cgit_currenturl();
1024                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1025                 if (ctx.cfg.root_readme)
1026                         site_link("about", "about", NULL, hc("about"),
1027                                   NULL, NULL, 0, 1);
1028                 html("</td><td class='form'>");
1029                 html("<form method='get' action='");
1030                 html_attr(currenturl);
1031                 html("'>\n");
1032                 html("<input type='text' name='q' size='10' value='");
1033                 html_attr(ctx.qry.search);
1034                 html("'/>\n");
1035                 html("<input type='submit' value='search'/>\n");
1036                 html("</form>");
1037                 free(currenturl);
1038         }
1039         html("</td></tr></table>\n");
1040         if (ctx.env.authenticated && ctx.qry.vpath) {
1041                 html("<div class='path'>");
1042                 html("path: ");
1043                 cgit_print_path_crumbs(ctx.qry.vpath);
1044                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1045                         html(" (");
1046                         ctx.qry.follow = !ctx.qry.follow;
1047                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1048                                         NULL, NULL);
1049                         ctx.qry.follow = !ctx.qry.follow;
1050                         html(")");
1051                 }
1052                 html("</div>");
1053         }
1054         html("<div class='content'>");
1055 }
1056
1057 void cgit_print_filemode(unsigned short mode)
1058 {
1059         if (S_ISDIR(mode))
1060                 html("d");
1061         else if (S_ISLNK(mode))
1062                 html("l");
1063         else if (S_ISGITLINK(mode))
1064                 html("m");
1065         else
1066                 html("-");
1067         html_fileperm(mode >> 6);
1068         html_fileperm(mode >> 3);
1069         html_fileperm(mode);
1070 }
1071
1072 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1073                                   const char *ref)
1074 {
1075         unsigned char sha1[20];
1076
1077         /*
1078          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1079          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1080          * i.e. each stripped tag can be inverted without ambiguities.
1081          */
1082         if (get_sha1(fmt("refs/tags/%s", ref), sha1) == 0 &&
1083             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1084             ((get_sha1(fmt("refs/tags/%s", ref + 1), sha1) == 0) +
1085              (get_sha1(fmt("refs/tags/v%s", ref + 1), sha1) == 0) +
1086              (get_sha1(fmt("refs/tags/V%s", ref + 1), sha1) == 0) == 1))
1087                 ref++;
1088
1089         strbuf_addf(filename, "%s-%s", base, ref);
1090 }
1091
1092 void cgit_print_snapshot_links(const char *repo, const char *head,
1093                                const char *hex, int snapshots)
1094 {
1095         const struct cgit_snapshot_format* f;
1096         struct strbuf filename = STRBUF_INIT;
1097         size_t prefixlen;
1098
1099         cgit_compose_snapshot_prefix(&filename, cgit_repobasename(repo), hex);
1100         prefixlen = filename.len;
1101         for (f = cgit_snapshot_formats; f->suffix; f++) {
1102                 if (!(snapshots & f->bit))
1103                         continue;
1104                 strbuf_setlen(&filename, prefixlen);
1105                 strbuf_addstr(&filename, f->suffix);
1106                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1107                                    filename.buf);
1108                 html("<br/>");
1109         }
1110         strbuf_release(&filename);
1111 }