ui-shared.c

   1 /* ui-shared.c: common web output functions
   2  *
   3  * Copyright (C) 2006-2017 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         const char *root = cgit_rooturl();
  70         size_t len = strlen(root);
  71
  72         if (!ctx.qry.url)
  73                 return xstrdup(root);
  74         if (len && root[len - 1] == '/')
  75                 return fmtalloc("%s%s", root, ctx.qry.url);
  76         return fmtalloc("%s/%s", root, ctx.qry.url);
  77 }
  78
  79 const char *cgit_rooturl(void)
  80 {
  81         if (ctx.cfg.virtual_root)
  82                 return ctx.cfg.virtual_root;
  83         else
  84                 return ctx.cfg.script_name;
  85 }
  86
  87 const char *cgit_loginurl(void)
  88 {
  89         static const char *login_url;
  90         if (!login_url)
  91                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
  92         return login_url;
  93 }
  94
  95 char *cgit_repourl(const char *reponame)
  96 {
  97         if (ctx.cfg.virtual_root)
  98                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
  99         else
 100                 return fmtalloc("?r=%s", reponame);
 101 }
 102
 103 char *cgit_fileurl(const char *reponame, const char *pagename,
 104                    const char *filename, const char *query)
 105 {
 106         struct strbuf sb = STRBUF_INIT;
 107         char *delim;
 108
 109         if (ctx.cfg.virtual_root) {
 110                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 111                             pagename, (filename ? filename:""));
 112                 delim = "?";
 113         } else {
 114                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 115                             (filename ? filename : ""));
 116                 delim = "&amp;";
 117         }
 118         if (query)
 119                 strbuf_addf(&sb, "%s%s", delim, query);
 120         return strbuf_detach(&sb, NULL);
 121 }
 122
 123 char *cgit_pageurl(const char *reponame, const char *pagename,
 124                    const char *query)
 125 {
 126         return cgit_fileurl(reponame, pagename, NULL, query);
 127 }
 128
 129 const char *cgit_repobasename(const char *reponame)
 130 {
 131         /* I assume we don't need to store more than one repo basename */
 132         static char rvbuf[1024];
 133         int p;
 134         const char *rv;
 135         strncpy(rvbuf, reponame, sizeof(rvbuf));
 136         if (rvbuf[sizeof(rvbuf)-1])
 137                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 138         p = strlen(rvbuf)-1;
 139         /* strip trailing slashes */
 140         while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
 141         /* strip trailing .git */
 142         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 143                 p -= 3; rvbuf[p--] = 0;
 144         }
 145         /* strip more trailing slashes if any */
 146         while ( p && rvbuf[p] == '/') rvbuf[p--] = 0;
 147         /* find last slash in the remaining string */
 148         rv = strrchr(rvbuf,'/');
 149         if (rv)
 150                 return ++rv;
 151         return rvbuf;
 152 }
 153
 154 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 155 {
 156         char *delim = "?";
 157
 158         if (always_root || page)
 159                 html_attr(cgit_rooturl());
 160         else {
 161                 char *currenturl = cgit_currenturl();
 162                 html_attr(currenturl);
 163                 free(currenturl);
 164         }
 165
 166         if (page) {
 167                 htmlf("?p=%s", page);
 168                 delim = "&amp;";
 169         }
 170         if (search) {
 171                 html(delim);
 172                 html("q=");
 173                 html_attr(search);
 174                 delim = "&amp;";
 175         }
 176         if (sort) {
 177                 html(delim);
 178                 html("s=");
 179                 html_attr(sort);
 180                 delim = "&amp;";
 181         }
 182         if (ofs) {
 183                 html(delim);
 184                 htmlf("ofs=%d", ofs);
 185         }
 186 }
 187
 188 static void site_link(const char *page, const char *name, const char *title,
 189                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 190 {
 191         html("<a");
 192         if (title) {
 193                 html(" title='");
 194                 html_attr(title);
 195                 html("'");
 196         }
 197         if (class) {
 198                 html(" class='");
 199                 html_attr(class);
 200                 html("'");
 201         }
 202         html(" href='");
 203         site_url(page, search, sort, ofs, always_root);
 204         html("'>");
 205         html_txt(name);
 206         html("</a>");
 207 }
 208
 209 void cgit_index_link(const char *name, const char *title, const char *class,
 210                      const char *pattern, const char *sort, int ofs, int always_root)
 211 {
 212         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 213 }
 214
 215 static char *repolink(const char *title, const char *class, const char *page,
 216                       const char *head, const char *path)
 217 {
 218         char *delim = "?";
 219
 220         html("<a");
 221         if (title) {
 222                 html(" title='");
 223                 html_attr(title);
 224                 html("'");
 225         }
 226         if (class) {
 227                 html(" class='");
 228                 html_attr(class);
 229                 html("'");
 230         }
 231         html(" href='");
 232         if (ctx.cfg.virtual_root) {
 233                 html_url_path(ctx.cfg.virtual_root);
 234                 html_url_path(ctx.repo->url);
 235                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 236                         html("/");
 237                 if (page) {
 238                         html_url_path(page);
 239                         html("/");
 240                         if (path)
 241                                 html_url_path(path);
 242                 }
 243         } else {
 244                 html_url_path(ctx.cfg.script_name);
 245                 html("?url=");
 246                 html_url_arg(ctx.repo->url);
 247                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 248                         html("/");
 249                 if (page) {
 250                         html_url_arg(page);
 251                         html("/");
 252                         if (path)
 253                                 html_url_arg(path);
 254                 }
 255                 delim = "&amp;";
 256         }
 257         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 258                 html(delim);
 259                 html("h=");
 260                 html_url_arg(head);
 261                 delim = "&amp;";
 262         }
 263         return fmt("%s", delim);
 264 }
 265
 266 static void reporevlink(const char *page, const char *name, const char *title,
 267                         const char *class, const char *head, const char *rev,
 268                         const char *path)
 269 {
 270         char *delim;
 271
 272         delim = repolink(title, class, page, head, path);
 273         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 274                 html(delim);
 275                 html("id=");
 276                 html_url_arg(rev);
 277         }
 278         html("'>");
 279         html_txt(name);
 280         html("</a>");
 281 }
 282
 283 void cgit_summary_link(const char *name, const char *title, const char *class,
 284                        const char *head)
 285 {
 286         reporevlink(NULL, name, title, class, head, NULL, NULL);
 287 }
 288
 289 void cgit_tag_link(const char *name, const char *title, const char *class,
 290                    const char *tag)
 291 {
 292         reporevlink("tag", name, title, class, tag, NULL, NULL);
 293 }
 294
 295 void cgit_tree_link(const char *name, const char *title, const char *class,
 296                     const char *head, const char *rev, const char *path)
 297 {
 298         reporevlink("tree", name, title, class, head, rev, path);
 299 }
 300
 301 void cgit_plain_link(const char *name, const char *title, const char *class,
 302                      const char *head, const char *rev, const char *path)
 303 {
 304         reporevlink("plain", name, title, class, head, rev, path);
 305 }
 306
 307 void cgit_blame_link(const char *name, const char *title, const char *class,
 308                      const char *head, const char *rev, const char *path)
 309 {
 310         reporevlink("blame", name, title, class, head, rev, path);
 311 }
 312
 313 void cgit_log_link(const char *name, const char *title, const char *class,
 314                    const char *head, const char *rev, const char *path,
 315                    int ofs, const char *grep, const char *pattern, int showmsg,
 316                    int follow)
 317 {
 318         char *delim;
 319
 320         delim = repolink(title, class, "log", head, path);
 321         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 322                 html(delim);
 323                 html("id=");
 324                 html_url_arg(rev);
 325                 delim = "&amp;";
 326         }
 327         if (grep && pattern) {
 328                 html(delim);
 329                 html("qt=");
 330                 html_url_arg(grep);
 331                 delim = "&amp;";
 332                 html(delim);
 333                 html("q=");
 334                 html_url_arg(pattern);
 335         }
 336         if (ofs > 0) {
 337                 html(delim);
 338                 html("ofs=");
 339                 htmlf("%d", ofs);
 340                 delim = "&amp;";
 341         }
 342         if (showmsg) {
 343                 html(delim);
 344                 html("showmsg=1");
 345                 delim = "&amp;";
 346         }
 347         if (follow) {
 348                 html(delim);
 349                 html("follow=1");
 350         }
 351         html("'>");
 352         html_txt(name);
 353         html("</a>");
 354 }
 355
 356 void cgit_commit_link(const char *name, const char *title, const char *class,
 357                       const char *head, const char *rev, const char *path)
 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                 if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 391                         html_ntxt(name, ctx.cfg.max_msg_len - 3);
 392                         html("...");
 393                 } else
 394                         html_txt(name);
 395         } else
 396                 html_txt("(no commit message)");
 397         html("</a>");
 398 }
 399
 400 void cgit_refs_link(const char *name, const char *title, const char *class,
 401                     const char *head, const char *rev, const char *path)
 402 {
 403         reporevlink("refs", name, title, class, head, rev, path);
 404 }
 405
 406 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 407                         const char *head, const char *rev,
 408                         const char *archivename)
 409 {
 410         reporevlink("snapshot", name, title, class, head, rev, archivename);
 411 }
 412
 413 void cgit_diff_link(const char *name, const char *title, const char *class,
 414                     const char *head, const char *new_rev, const char *old_rev,
 415                     const char *path)
 416 {
 417         char *delim;
 418
 419         delim = repolink(title, class, "diff", head, path);
 420         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 421                 html(delim);
 422                 html("id=");
 423                 html_url_arg(new_rev);
 424                 delim = "&amp;";
 425         }
 426         if (old_rev) {
 427                 html(delim);
 428                 html("id2=");
 429                 html_url_arg(old_rev);
 430                 delim = "&amp;";
 431         }
 432         if (ctx.qry.difftype) {
 433                 html(delim);
 434                 htmlf("dt=%d", ctx.qry.difftype);
 435                 delim = "&amp;";
 436         }
 437         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 438                 html(delim);
 439                 html("context=");
 440                 htmlf("%d", ctx.qry.context);
 441                 delim = "&amp;";
 442         }
 443         if (ctx.qry.ignorews) {
 444                 html(delim);
 445                 html("ignorews=1");
 446                 delim = "&amp;";
 447         }
 448         if (ctx.qry.follow) {
 449                 html(delim);
 450                 html("follow=1");
 451         }
 452         html("'>");
 453         html_txt(name);
 454         html("</a>");
 455 }
 456
 457 void cgit_patch_link(const char *name, const char *title, const char *class,
 458                      const char *head, const char *rev, const char *path)
 459 {
 460         reporevlink("patch", name, title, class, head, rev, path);
 461 }
 462
 463 void cgit_stats_link(const char *name, const char *title, const char *class,
 464                      const char *head, const char *path)
 465 {
 466         reporevlink("stats", name, title, class, head, NULL, path);
 467 }
 468
 469 static void cgit_self_link(char *name, const char *title, const char *class)
 470 {
 471         if (!strcmp(ctx.qry.page, "repolist"))
 472                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 473                                 ctx.qry.ofs, 1);
 474         else if (!strcmp(ctx.qry.page, "summary"))
 475                 cgit_summary_link(name, title, class, ctx.qry.head);
 476         else if (!strcmp(ctx.qry.page, "tag"))
 477                 cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
 478                                ctx.qry.sha1 : ctx.qry.head);
 479         else if (!strcmp(ctx.qry.page, "tree"))
 480                 cgit_tree_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, "plain"))
 484                 cgit_plain_link(name, title, class, ctx.qry.head,
 485                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 486                                 ctx.qry.path);
 487         else if (!strcmp(ctx.qry.page, "blame"))
 488                 cgit_blame_link(name, title, class, ctx.qry.head,
 489                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 490                                 ctx.qry.path);
 491         else if (!strcmp(ctx.qry.page, "log"))
 492                 cgit_log_link(name, title, class, ctx.qry.head,
 493                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 494                               ctx.qry.path, ctx.qry.ofs,
 495                               ctx.qry.grep, ctx.qry.search,
 496                               ctx.qry.showmsg, ctx.qry.follow);
 497         else if (!strcmp(ctx.qry.page, "commit"))
 498                 cgit_commit_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, "patch"))
 502                 cgit_patch_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, "refs"))
 506                 cgit_refs_link(name, title, class, ctx.qry.head,
 507                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 508                                ctx.qry.path);
 509         else if (!strcmp(ctx.qry.page, "snapshot"))
 510                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 511                                    ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 512                                    ctx.qry.path);
 513         else if (!strcmp(ctx.qry.page, "diff"))
 514                 cgit_diff_link(name, title, class, ctx.qry.head,
 515                                ctx.qry.sha1, ctx.qry.sha2,
 516                                ctx.qry.path);
 517         else if (!strcmp(ctx.qry.page, "stats"))
 518                 cgit_stats_link(name, title, class, ctx.qry.head,
 519                                 ctx.qry.path);
 520         else {
 521                 /* Don't known how to make link for this page */
 522                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 523                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 524                 html_txt(ctx.qry.page);
 525                 html("' -->");
 526                 html_txt(name);
 527                 html("</a>");
 528         }
 529 }
 530
 531 void cgit_object_link(struct object *obj)
 532 {
 533         char *page, *shortrev, *fullrev, *name;
 534
 535         fullrev = oid_to_hex(&obj->oid);
 536         shortrev = xstrdup(fullrev);
 537         shortrev[10] = '\0';
 538         if (obj->type == OBJ_COMMIT) {
 539                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 540                                  ctx.qry.head, fullrev, NULL);
 541                 return;
 542         } else if (obj->type == OBJ_TREE)
 543                 page = "tree";
 544         else if (obj->type == OBJ_TAG)
 545                 page = "tag";
 546         else
 547                 page = "blob";
 548         name = fmt("%s %s...", type_name(obj->type), shortrev);
 549         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 550 }
 551
 552 static struct string_list_item *lookup_path(struct string_list *list,
 553                                             const char *path)
 554 {
 555         struct string_list_item *item;
 556
 557         while (path && path[0]) {
 558                 if ((item = string_list_lookup(list, path)))
 559                         return item;
 560                 if (!(path = strchr(path, '/')))
 561                         break;
 562                 path++;
 563         }
 564         return NULL;
 565 }
 566
 567 void cgit_submodule_link(const char *class, char *path, const char *rev)
 568 {
 569         struct string_list *list;
 570         struct string_list_item *item;
 571         char tail, *dir;
 572         size_t len;
 573
 574         len = 0;
 575         tail = 0;
 576         list = &ctx.repo->submodules;
 577         item = lookup_path(list, path);
 578         if (!item) {
 579                 len = strlen(path);
 580                 tail = path[len - 1];
 581                 if (tail == '/') {
 582                         path[len - 1] = 0;
 583                         item = lookup_path(list, path);
 584                 }
 585         }
 586         if (item || ctx.repo->module_link) {
 587                 html("<a ");
 588                 if (class)
 589                         htmlf("class='%s' ", class);
 590                 html("href='");
 591                 if (item) {
 592                         html_attrf(item->util, rev);
 593                 } else {
 594                         dir = strrchr(path, '/');
 595                         if (dir)
 596                                 dir++;
 597                         else
 598                                 dir = path;
 599                         html_attrf(ctx.repo->module_link, dir, rev);
 600                 }
 601                 html("'>");
 602                 html_txt(path);
 603                 html("</a>");
 604         } else {
 605                 html("<span");
 606                 if (class)
 607                         htmlf(" class='%s'", class);
 608                 html(">");
 609                 html_txt(path);
 610                 html("</span>");
 611         }
 612         html_txtf(" @ %.7s", rev);
 613         if (item && tail)
 614                 path[len - 1] = tail;
 615 }
 616
 617 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 618 {
 619         static struct date_mode mode;
 620         mode.type = type;
 621         mode.local = ctx.cfg.local_time;
 622         return &mode;
 623 }
 624
 625 static void print_rel_date(time_t t, int tz, double value,
 626         const char *class, const char *suffix)
 627 {
 628         htmlf("<span class='%s' title='", class);
 629         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 630         htmlf("'>%.0f %s</span>", value, suffix);
 631 }
 632
 633 void cgit_print_age(time_t t, int tz, time_t max_relative)
 634 {
 635         time_t now, secs;
 636
 637         if (!t)
 638                 return;
 639         time(&now);
 640         secs = now - t;
 641         if (secs < 0)
 642                 secs = 0;
 643
 644         if (secs > max_relative && max_relative >= 0) {
 645                 html("<span title='");
 646                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 647                 html("'>");
 648                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 649                 html("</span>");
 650                 return;
 651         }
 652
 653         if (secs < TM_HOUR * 2) {
 654                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 655                 return;
 656         }
 657         if (secs < TM_DAY * 2) {
 658                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 659                 return;
 660         }
 661         if (secs < TM_WEEK * 2) {
 662                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 663                 return;
 664         }
 665         if (secs < TM_MONTH * 2) {
 666                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 667                 return;
 668         }
 669         if (secs < TM_YEAR * 2) {
 670                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 671                 return;
 672         }
 673         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 674 }
 675
 676 void cgit_print_http_headers(void)
 677 {
 678         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 679                 return;
 680
 681         if (ctx.page.status)
 682                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 683         if (ctx.page.mimetype && ctx.page.charset)
 684                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 685                       ctx.page.charset);
 686         else if (ctx.page.mimetype)
 687                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 688         if (ctx.page.size)
 689                 htmlf("Content-Length: %zd\n", ctx.page.size);
 690         if (ctx.page.filename) {
 691                 html("Content-Disposition: inline; filename=\"");
 692                 html_header_arg_in_quotes(ctx.page.filename);
 693                 html("\"\n");
 694         }
 695         if (!ctx.env.authenticated)
 696                 html("Cache-Control: no-cache, no-store\n");
 697         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 698         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 699         if (ctx.page.etag)
 700                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 701         html("\n");
 702         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 703                 exit(0);
 704 }
 705
 706 void cgit_redirect(const char *url, bool permanent)
 707 {
 708         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 709         html("Location: ");
 710         html_url_path(url);
 711         html("\n\n");
 712 }
 713
 714 static void print_rel_vcs_link(const char *url)
 715 {
 716         html("<link rel='vcs-git' href='");
 717         html_attr(url);
 718         html("' title='");
 719         html_attr(ctx.repo->name);
 720         html(" Git repository'/>\n");
 721 }
 722
 723 void cgit_print_docstart(void)
 724 {
 725         char *host = cgit_hosturl();
 726
 727         if (ctx.cfg.embedded) {
 728                 if (ctx.cfg.header)
 729                         html_include(ctx.cfg.header);
 730                 return;
 731         }
 732
 733         html(cgit_doctype);
 734         html("<html lang='en'>\n");
 735         html("<head>\n");
 736         html("<title>");
 737         html_txt(ctx.page.title);
 738         html("</title>\n");
 739         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 740         if (ctx.cfg.robots && *ctx.cfg.robots)
 741                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 742         html("<link rel='stylesheet' type='text/css' href='");
 743         html_attr(ctx.cfg.css);
 744         html("'/>\n");
 745         if (ctx.cfg.favicon) {
 746                 html("<link rel='shortcut icon' href='");
 747                 html_attr(ctx.cfg.favicon);
 748                 html("'/>\n");
 749         }
 750         if (host && ctx.repo && ctx.qry.head) {
 751                 char *fileurl;
 752                 struct strbuf sb = STRBUF_INIT;
 753                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 754
 755                 html("<link rel='alternate' title='Atom feed' href='");
 756                 html(cgit_httpscheme());
 757                 html_attr(host);
 758                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 759                                        sb.buf);
 760                 html_attr(fileurl);
 761                 html("' type='application/atom+xml'/>\n");
 762                 strbuf_release(&sb);
 763                 free(fileurl);
 764         }
 765         if (ctx.repo)
 766                 cgit_add_clone_urls(print_rel_vcs_link);
 767         if (ctx.cfg.head_include)
 768                 html_include(ctx.cfg.head_include);
 769         html("</head>\n");
 770         html("<body>\n");
 771         if (ctx.cfg.header)
 772                 html_include(ctx.cfg.header);
 773         free(host);
 774 }
 775
 776 void cgit_print_docend(void)
 777 {
 778         html("</div> <!-- class=content -->\n");
 779         if (ctx.cfg.embedded) {
 780                 html("</div> <!-- id=cgit -->\n");
 781                 if (ctx.cfg.footer)
 782                         html_include(ctx.cfg.footer);
 783                 return;
 784         }
 785         if (ctx.cfg.footer)
 786                 html_include(ctx.cfg.footer);
 787         else {
 788                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> at ",
 789                         cgit_version);
 790                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 791                 html("</div>\n");
 792         }
 793         html("</div> <!-- id=cgit -->\n");
 794         html("</body>\n</html>\n");
 795 }
 796
 797 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 798 {
 799         va_list ap;
 800         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 801         ctx.page.status = code;
 802         ctx.page.statusmsg = msg;
 803         cgit_print_layout_start();
 804         va_start(ap, fmt);
 805         cgit_vprint_error(fmt, ap);
 806         va_end(ap);
 807         cgit_print_layout_end();
 808 }
 809
 810 void cgit_print_layout_start(void)
 811 {
 812         cgit_print_http_headers();
 813         cgit_print_docstart();
 814         cgit_print_pageheader();
 815 }
 816
 817 void cgit_print_layout_end(void)
 818 {
 819         cgit_print_docend();
 820 }
 821
 822 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 823 {
 824         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 825         int i;
 826
 827         for (i = 0; url_list[i]; i++) {
 828                 strbuf_rtrim(url_list[i]);
 829                 if (url_list[i]->len == 0)
 830                         continue;
 831                 if (suffix && *suffix)
 832                         strbuf_addf(url_list[i], "/%s", suffix);
 833                 fn(url_list[i]->buf);
 834         }
 835
 836         strbuf_list_free(url_list);
 837 }
 838
 839 void cgit_add_clone_urls(void (*fn)(const char *))
 840 {
 841         if (ctx.repo->clone_url)
 842                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 843         else if (ctx.cfg.clone_prefix)
 844                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 845 }
 846
 847 static int print_branch_option(const char *refname, const struct object_id *oid,
 848                                int flags, void *cb_data)
 849 {
 850         char *name = (char *)refname;
 851         html_option(name, name, ctx.qry.head);
 852         return 0;
 853 }
 854
 855 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 856                                 const char *page)
 857 {
 858         if (!ctx.cfg.virtual_root) {
 859                 struct strbuf url = STRBUF_INIT;
 860
 861                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 862                 if (ctx.qry.vpath)
 863                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 864                 html_hidden("url", url.buf);
 865                 strbuf_release(&url);
 866         }
 867
 868         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 869             strcmp(ctx.qry.head, ctx.repo->defbranch))
 870                 html_hidden("h", ctx.qry.head);
 871
 872         if (ctx.qry.sha1)
 873                 html_hidden("id", ctx.qry.sha1);
 874         if (ctx.qry.sha2)
 875                 html_hidden("id2", ctx.qry.sha2);
 876         if (ctx.qry.showmsg)
 877                 html_hidden("showmsg", "1");
 878
 879         if (incl_search) {
 880                 if (ctx.qry.grep)
 881                         html_hidden("qt", ctx.qry.grep);
 882                 if (ctx.qry.search)
 883                         html_hidden("q", ctx.qry.search);
 884         }
 885 }
 886
 887 static const char *hc(const char *page)
 888 {
 889         if (!ctx.qry.page)
 890                 return NULL;
 891
 892         return strcmp(ctx.qry.page, page) ? NULL : "active";
 893 }
 894
 895 static void cgit_print_path_crumbs(char *path)
 896 {
 897         char *old_path = ctx.qry.path;
 898         char *p = path, *q, *end = path + strlen(path);
 899
 900         ctx.qry.path = NULL;
 901         cgit_self_link("root", NULL, NULL);
 902         ctx.qry.path = p = path;
 903         while (p < end) {
 904                 if (!(q = strchr(p, '/')))
 905                         q = end;
 906                 *q = '\0';
 907                 html_txt("/");
 908                 cgit_self_link(p, NULL, NULL);
 909                 if (q < end)
 910                         *q = '/';
 911                 p = q + 1;
 912         }
 913         ctx.qry.path = old_path;
 914 }
 915
 916 static void print_header(void)
 917 {
 918         char *logo = NULL, *logo_link = NULL;
 919
 920         html("<table id='header'>\n");
 921         html("<tr>\n");
 922
 923         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 924                 logo = ctx.repo->logo;
 925         else
 926                 logo = ctx.cfg.logo;
 927         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 928                 logo_link = ctx.repo->logo_link;
 929         else
 930                 logo_link = ctx.cfg.logo_link;
 931         if (logo && *logo) {
 932                 html("<td class='logo' rowspan='2'><a href='");
 933                 if (logo_link && *logo_link)
 934                         html_attr(logo_link);
 935                 else
 936                         html_attr(cgit_rooturl());
 937                 html("'><img src='");
 938                 html_attr(logo);
 939                 html("' alt='cgit logo'/></a></td>\n");
 940         }
 941
 942         html("<td class='main'>");
 943         if (ctx.repo) {
 944                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 945                 html(" : ");
 946                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 947                 if (ctx.env.authenticated) {
 948                         html("</td><td class='form'>");
 949                         html("<form method='get'>\n");
 950                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
 951                         html("<select name='h' onchange='this.form.submit();'>\n");
 952                         for_each_branch_ref(print_branch_option, ctx.qry.head);
 953                         if (ctx.repo->enable_remote_branches)
 954                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
 955                         html("</select> ");
 956                         html("<input type='submit' value='switch'/>");
 957                         html("</form>");
 958                 }
 959         } else
 960                 html_txt(ctx.cfg.root_title);
 961         html("</td></tr>\n");
 962
 963         html("<tr><td class='sub'>");
 964         if (ctx.repo) {
 965                 html_txt(ctx.repo->desc);
 966                 html("</td><td class='sub right'>");
 967                 html_txt(ctx.repo->owner);
 968         } else {
 969                 if (ctx.cfg.root_desc)
 970                         html_txt(ctx.cfg.root_desc);
 971                 else if (ctx.cfg.index_info)
 972                         html_include(ctx.cfg.index_info);
 973         }
 974         html("</td></tr></table>\n");
 975 }
 976
 977 void cgit_print_pageheader(void)
 978 {
 979         html("<div id='cgit'>");
 980         if (!ctx.env.authenticated || !ctx.cfg.noheader)
 981                 print_header();
 982
 983         html("<table class='tabs'><tr><td>\n");
 984         if (ctx.env.authenticated && ctx.repo) {
 985                 if (ctx.repo->readme.nr)
 986                         reporevlink("about", "about", NULL,
 987                                     hc("about"), ctx.qry.head, NULL,
 988                                     NULL);
 989                 cgit_summary_link("summary", NULL, hc("summary"),
 990                                   ctx.qry.head);
 991                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
 992                                ctx.qry.sha1, NULL);
 993                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
 994                               NULL, ctx.qry.vpath, 0, NULL, NULL,
 995                               ctx.qry.showmsg, ctx.qry.follow);
 996                 if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
 997                         cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
 998                                         ctx.qry.sha1, ctx.qry.vpath);
 999                 else
1000                         cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
1001                                        ctx.qry.sha1, ctx.qry.vpath);
1002                 cgit_commit_link("commit", NULL, hc("commit"),
1003                                  ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
1004                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
1005                                ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
1006                 if (ctx.repo->max_stats)
1007                         cgit_stats_link("stats", NULL, hc("stats"),
1008                                         ctx.qry.head, ctx.qry.vpath);
1009                 if (ctx.repo->homepage) {
1010                         html("<a href='");
1011                         html_attr(ctx.repo->homepage);
1012                         html("'>homepage</a>");
1013                 }
1014                 html("</td><td class='form'>");
1015                 html("<form class='right' method='get' action='");
1016                 if (ctx.cfg.virtual_root) {
1017                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1018                                                    ctx.qry.vpath, NULL);
1019                         html_url_path(fileurl);
1020                         free(fileurl);
1021                 }
1022                 html("'>\n");
1023                 cgit_add_hidden_formfields(1, 0, "log");
1024                 html("<select name='qt'>\n");
1025                 html_option("grep", "log msg", ctx.qry.grep);
1026                 html_option("author", "author", ctx.qry.grep);
1027                 html_option("committer", "committer", ctx.qry.grep);
1028                 html_option("range", "range", ctx.qry.grep);
1029                 html("</select>\n");
1030                 html("<input class='txt' type='search' size='10' name='q' value='");
1031                 html_attr(ctx.qry.search);
1032                 html("'/>\n");
1033                 html("<input type='submit' value='search'/>\n");
1034                 html("</form>\n");
1035         } else if (ctx.env.authenticated) {
1036                 char *currenturl = cgit_currenturl();
1037                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1038                 if (ctx.cfg.root_readme)
1039                         site_link("about", "about", NULL, hc("about"),
1040                                   NULL, NULL, 0, 1);
1041                 html("</td><td class='form'>");
1042                 html("<form method='get' action='");
1043                 html_attr(currenturl);
1044                 html("'>\n");
1045                 html("<input type='search' name='q' size='10' value='");
1046                 html_attr(ctx.qry.search);
1047                 html("'/>\n");
1048                 html("<input type='submit' value='search'/>\n");
1049                 html("</form>");
1050                 free(currenturl);
1051         }
1052         html("</td></tr></table>\n");
1053         if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
1054                 html("<div class='path'>");
1055                 html("path: ");
1056                 cgit_print_path_crumbs(ctx.qry.vpath);
1057                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1058                         html(" (");
1059                         ctx.qry.follow = !ctx.qry.follow;
1060                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1061                                         NULL, NULL);
1062                         ctx.qry.follow = !ctx.qry.follow;
1063                         html(")");
1064                 }
1065                 html("</div>");
1066         }
1067         html("<div class='content'>");
1068 }
1069
1070 void cgit_print_filemode(unsigned short mode)
1071 {
1072         if (S_ISDIR(mode))
1073                 html("d");
1074         else if (S_ISLNK(mode))
1075                 html("l");
1076         else if (S_ISGITLINK(mode))
1077                 html("m");
1078         else
1079                 html("-");
1080         html_fileperm(mode >> 6);
1081         html_fileperm(mode >> 3);
1082         html_fileperm(mode);
1083 }
1084
1085 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1086                                   const char *ref)
1087 {
1088         struct object_id oid;
1089
1090         /*
1091          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1092          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1093          * i.e. each stripped tag can be inverted without ambiguities.
1094          */
1095         if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
1096             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1097             ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
1098              (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
1099              (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
1100                 ref++;
1101
1102         strbuf_addf(filename, "%s-%s", base, ref);
1103 }
1104
1105 void cgit_print_snapshot_links(const char *repo, const char *head,
1106                                const char *hex, int snapshots)
1107 {
1108         const struct cgit_snapshot_format* f;
1109         struct strbuf filename = STRBUF_INIT;
1110         size_t prefixlen;
1111
1112         cgit_compose_snapshot_prefix(&filename, cgit_repobasename(repo), hex);
1113         prefixlen = filename.len;
1114         for (f = cgit_snapshot_formats; f->suffix; f++) {
1115                 if (!(snapshots & f->bit))
1116                         continue;
1117                 strbuf_setlen(&filename, prefixlen);
1118                 strbuf_addstr(&filename, f->suffix);
1119                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1120                                    filename.buf);
1121                 html("<br/>");
1122         }
1123         strbuf_release(&filename);
1124 }
1125
1126 void cgit_set_title_from_path(const char *path)
1127 {
1128         size_t path_len, path_index, path_last_end;
1129         char *new_title;
1130
1131         if (!path)
1132                 return;
1133
1134         path_len = strlen(path);
1135         new_title = xmalloc(path_len + 3 + strlen(ctx.page.title) + 1);
1136         new_title[0] = '\0';
1137
1138         for (path_index = path_len, path_last_end = path_len; path_index-- > 0;) {
1139                 if (path[path_index] == '/') {
1140                         if (path_index == path_len - 1) {
1141                                 path_last_end = path_index - 1;
1142                                 continue;
1143                         }
1144                         strncat(new_title, &path[path_index + 1], path_last_end - path_index - 1);
1145                         strcat(new_title, "\\");
1146                         path_last_end = path_index;
1147                 }
1148         }
1149         if (path_last_end)
1150                 strncat(new_title, path, path_last_end);
1151
1152         strcat(new_title, " - ");
1153         strcat(new_title, ctx.page.title);
1154         ctx.page.title = new_title;
1155 }