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 #include "version.h"
  14
  15 static const char cgit_doctype[] =
  16 "<!DOCTYPE html>\n";
  17
  18 static char *http_date(time_t t)
  19 {
  20         static char day[][4] =
  21                 {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  22         static char month[][4] =
  23                 {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
  24                  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  25         struct tm *tm = gmtime(&t);
  26         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
  27                    tm->tm_mday, month[tm->tm_mon], 1900 + tm->tm_year,
  28                    tm->tm_hour, tm->tm_min, tm->tm_sec);
  29 }
  30
  31 void cgit_print_error(const char *fmt, ...)
  32 {
  33         va_list ap;
  34         va_start(ap, fmt);
  35         cgit_vprint_error(fmt, ap);
  36         va_end(ap);
  37 }
  38
  39 void cgit_vprint_error(const char *fmt, va_list ap)
  40 {
  41         va_list cp;
  42         html("<div class='error'>");
  43         va_copy(cp, ap);
  44         html_vtxtf(fmt, cp);
  45         va_end(cp);
  46         html("</div>\n");
  47 }
  48
  49 const char *cgit_httpscheme(void)
  50 {
  51         if (ctx.env.https && !strcmp(ctx.env.https, "on"))
  52                 return "https://";
  53         else
  54                 return "http://";
  55 }
  56
  57 char *cgit_hosturl(void)
  58 {
  59         if (ctx.env.http_host)
  60                 return xstrdup(ctx.env.http_host);
  61         if (!ctx.env.server_name)
  62                 return NULL;
  63         if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
  64                 return xstrdup(ctx.env.server_name);
  65         return fmtalloc("%s:%s", ctx.env.server_name, ctx.env.server_port);
  66 }
  67
  68 char *cgit_currenturl(void)
  69 {
  70         const char *root = cgit_rooturl();
  71         size_t len = strlen(root);
  72
  73         if (!ctx.qry.url)
  74                 return xstrdup(root);
  75         if (len && root[len - 1] == '/')
  76                 return fmtalloc("%s%s", root, ctx.qry.url);
  77         return fmtalloc("%s/%s", root, ctx.qry.url);
  78 }
  79
  80 const char *cgit_rooturl(void)
  81 {
  82         if (ctx.cfg.virtual_root)
  83                 return ctx.cfg.virtual_root;
  84         else
  85                 return ctx.cfg.script_name;
  86 }
  87
  88 const char *cgit_loginurl(void)
  89 {
  90         static const char *login_url;
  91         if (!login_url)
  92                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
  93         return login_url;
  94 }
  95
  96 char *cgit_repourl(const char *reponame)
  97 {
  98         if (ctx.cfg.virtual_root)
  99                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
 100         else
 101                 return fmtalloc("?r=%s", reponame);
 102 }
 103
 104 char *cgit_fileurl(const char *reponame, const char *pagename,
 105                    const char *filename, const char *query)
 106 {
 107         struct strbuf sb = STRBUF_INIT;
 108         char *delim;
 109
 110         if (ctx.cfg.virtual_root) {
 111                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 112                             pagename, (filename ? filename:""));
 113                 delim = "?";
 114         } else {
 115                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 116                             (filename ? filename : ""));
 117                 delim = "&amp;";
 118         }
 119         if (query)
 120                 strbuf_addf(&sb, "%s%s", delim, query);
 121         return strbuf_detach(&sb, NULL);
 122 }
 123
 124 char *cgit_pageurl(const char *reponame, const char *pagename,
 125                    const char *query)
 126 {
 127         return cgit_fileurl(reponame, pagename, NULL, query);
 128 }
 129
 130 const char *cgit_repobasename(const char *reponame)
 131 {
 132         /* I assume we don't need to store more than one repo basename */
 133         static char rvbuf[1024];
 134         int p;
 135         const char *rv;
 136         strncpy(rvbuf, reponame, sizeof(rvbuf));
 137         if (rvbuf[sizeof(rvbuf)-1])
 138                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 139         p = strlen(rvbuf)-1;
 140         /* strip trailing slashes */
 141         while (p && rvbuf[p] == '/') rvbuf[p--] = 0;
 142         /* strip trailing .git */
 143         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 144                 p -= 3; rvbuf[p--] = 0;
 145         }
 146         /* strip more trailing slashes if any */
 147         while ( p && rvbuf[p] == '/') rvbuf[p--] = 0;
 148         /* find last slash in the remaining string */
 149         rv = strrchr(rvbuf,'/');
 150         if (rv)
 151                 return ++rv;
 152         return rvbuf;
 153 }
 154
 155 const char *cgit_snapshot_prefix(const struct cgit_repo *repo)
 156 {
 157         if (repo->snapshot_prefix)
 158                 return repo->snapshot_prefix;
 159
 160         return cgit_repobasename(repo->url);
 161 }
 162
 163 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 164 {
 165         char *delim = "?";
 166
 167         if (always_root || page)
 168                 html_attr(cgit_rooturl());
 169         else {
 170                 char *currenturl = cgit_currenturl();
 171                 html_attr(currenturl);
 172                 free(currenturl);
 173         }
 174
 175         if (page) {
 176                 htmlf("?p=%s", page);
 177                 delim = "&amp;";
 178         }
 179         if (search) {
 180                 html(delim);
 181                 html("q=");
 182                 html_attr(search);
 183                 delim = "&amp;";
 184         }
 185         if (sort) {
 186                 html(delim);
 187                 html("s=");
 188                 html_attr(sort);
 189                 delim = "&amp;";
 190         }
 191         if (ofs) {
 192                 html(delim);
 193                 htmlf("ofs=%d", ofs);
 194         }
 195 }
 196
 197 static void site_link(const char *page, const char *name, const char *title,
 198                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 199 {
 200         html("<a");
 201         if (title) {
 202                 html(" title='");
 203                 html_attr(title);
 204                 html("'");
 205         }
 206         if (class) {
 207                 html(" class='");
 208                 html_attr(class);
 209                 html("'");
 210         }
 211         html(" href='");
 212         site_url(page, search, sort, ofs, always_root);
 213         html("'>");
 214         html_txt(name);
 215         html("</a>");
 216 }
 217
 218 void cgit_index_link(const char *name, const char *title, const char *class,
 219                      const char *pattern, const char *sort, int ofs, int always_root)
 220 {
 221         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 222 }
 223
 224 static char *repolink(const char *title, const char *class, const char *page,
 225                       const char *head, const char *path)
 226 {
 227         char *delim = "?";
 228
 229         html("<a");
 230         if (title) {
 231                 html(" title='");
 232                 html_attr(title);
 233                 html("'");
 234         }
 235         if (class) {
 236                 html(" class='");
 237                 html_attr(class);
 238                 html("'");
 239         }
 240         html(" href='");
 241         if (ctx.cfg.virtual_root) {
 242                 html_url_path(ctx.cfg.virtual_root);
 243                 html_url_path(ctx.repo->url);
 244                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 245                         html("/");
 246                 if (page) {
 247                         html_url_path(page);
 248                         html("/");
 249                         if (path)
 250                                 html_url_path(path);
 251                 }
 252         } else {
 253                 html_url_path(ctx.cfg.script_name);
 254                 html("?url=");
 255                 html_url_arg(ctx.repo->url);
 256                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 257                         html("/");
 258                 if (page) {
 259                         html_url_arg(page);
 260                         html("/");
 261                         if (path)
 262                                 html_url_arg(path);
 263                 }
 264                 delim = "&amp;";
 265         }
 266         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 267                 html(delim);
 268                 html("h=");
 269                 html_url_arg(head);
 270                 delim = "&amp;";
 271         }
 272         return fmt("%s", delim);
 273 }
 274
 275 static void reporevlink(const char *page, const char *name, const char *title,
 276                         const char *class, const char *head, const char *rev,
 277                         const char *path)
 278 {
 279         char *delim;
 280
 281         delim = repolink(title, class, page, head, path);
 282         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 283                 html(delim);
 284                 html("id=");
 285                 html_url_arg(rev);
 286         }
 287         html("'>");
 288         html_txt(name);
 289         html("</a>");
 290 }
 291
 292 void cgit_summary_link(const char *name, const char *title, const char *class,
 293                        const char *head)
 294 {
 295         reporevlink(NULL, name, title, class, head, NULL, NULL);
 296 }
 297
 298 void cgit_tag_link(const char *name, const char *title, const char *class,
 299                    const char *tag)
 300 {
 301         reporevlink("tag", name, title, class, tag, NULL, NULL);
 302 }
 303
 304 void cgit_tree_link(const char *name, const char *title, const char *class,
 305                     const char *head, const char *rev, const char *path)
 306 {
 307         reporevlink("tree", name, title, class, head, rev, path);
 308 }
 309
 310 void cgit_plain_link(const char *name, const char *title, const char *class,
 311                      const char *head, const char *rev, const char *path)
 312 {
 313         reporevlink("plain", name, title, class, head, rev, path);
 314 }
 315
 316 void cgit_blame_link(const char *name, const char *title, const char *class,
 317                      const char *head, const char *rev, const char *path)
 318 {
 319         reporevlink("blame", name, title, class, head, rev, path);
 320 }
 321
 322 void cgit_log_link(const char *name, const char *title, const char *class,
 323                    const char *head, const char *rev, const char *path,
 324                    int ofs, const char *grep, const char *pattern, int showmsg,
 325                    int follow)
 326 {
 327         char *delim;
 328
 329         delim = repolink(title, class, "log", head, path);
 330         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 331                 html(delim);
 332                 html("id=");
 333                 html_url_arg(rev);
 334                 delim = "&amp;";
 335         }
 336         if (grep && pattern) {
 337                 html(delim);
 338                 html("qt=");
 339                 html_url_arg(grep);
 340                 delim = "&amp;";
 341                 html(delim);
 342                 html("q=");
 343                 html_url_arg(pattern);
 344         }
 345         if (ofs > 0) {
 346                 html(delim);
 347                 html("ofs=");
 348                 htmlf("%d", ofs);
 349                 delim = "&amp;";
 350         }
 351         if (showmsg) {
 352                 html(delim);
 353                 html("showmsg=1");
 354                 delim = "&amp;";
 355         }
 356         if (follow) {
 357                 html(delim);
 358                 html("follow=1");
 359         }
 360         html("'>");
 361         html_txt(name);
 362         html("</a>");
 363 }
 364
 365 void cgit_commit_link(const char *name, const char *title, const char *class,
 366                       const char *head, const char *rev, const char *path)
 367 {
 368         char *delim;
 369
 370         delim = repolink(title, class, "commit", head, path);
 371         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 372                 html(delim);
 373                 html("id=");
 374                 html_url_arg(rev);
 375                 delim = "&amp;";
 376         }
 377         if (ctx.qry.difftype) {
 378                 html(delim);
 379                 htmlf("dt=%d", ctx.qry.difftype);
 380                 delim = "&amp;";
 381         }
 382         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 383                 html(delim);
 384                 html("context=");
 385                 htmlf("%d", ctx.qry.context);
 386                 delim = "&amp;";
 387         }
 388         if (ctx.qry.ignorews) {
 389                 html(delim);
 390                 html("ignorews=1");
 391                 delim = "&amp;";
 392         }
 393         if (ctx.qry.follow) {
 394                 html(delim);
 395                 html("follow=1");
 396         }
 397         html("'>");
 398         if (name[0] != '\0') {
 399                 if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 400                         html_ntxt(name, ctx.cfg.max_msg_len - 3);
 401                         html("...");
 402                 } else
 403                         html_txt(name);
 404         } else
 405                 html_txt("(no commit message)");
 406         html("</a>");
 407 }
 408
 409 void cgit_refs_link(const char *name, const char *title, const char *class,
 410                     const char *head, const char *rev, const char *path)
 411 {
 412         reporevlink("refs", name, title, class, head, rev, path);
 413 }
 414
 415 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 416                         const char *head, const char *rev,
 417                         const char *archivename)
 418 {
 419         reporevlink("snapshot", name, title, class, head, rev, archivename);
 420 }
 421
 422 void cgit_diff_link(const char *name, const char *title, const char *class,
 423                     const char *head, const char *new_rev, const char *old_rev,
 424                     const char *path)
 425 {
 426         char *delim;
 427
 428         delim = repolink(title, class, "diff", head, path);
 429         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 430                 html(delim);
 431                 html("id=");
 432                 html_url_arg(new_rev);
 433                 delim = "&amp;";
 434         }
 435         if (old_rev) {
 436                 html(delim);
 437                 html("id2=");
 438                 html_url_arg(old_rev);
 439                 delim = "&amp;";
 440         }
 441         if (ctx.qry.difftype) {
 442                 html(delim);
 443                 htmlf("dt=%d", ctx.qry.difftype);
 444                 delim = "&amp;";
 445         }
 446         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 447                 html(delim);
 448                 html("context=");
 449                 htmlf("%d", ctx.qry.context);
 450                 delim = "&amp;";
 451         }
 452         if (ctx.qry.ignorews) {
 453                 html(delim);
 454                 html("ignorews=1");
 455                 delim = "&amp;";
 456         }
 457         if (ctx.qry.follow) {
 458                 html(delim);
 459                 html("follow=1");
 460         }
 461         html("'>");
 462         html_txt(name);
 463         html("</a>");
 464 }
 465
 466 void cgit_patch_link(const char *name, const char *title, const char *class,
 467                      const char *head, const char *rev, const char *path)
 468 {
 469         reporevlink("patch", name, title, class, head, rev, path);
 470 }
 471
 472 void cgit_stats_link(const char *name, const char *title, const char *class,
 473                      const char *head, const char *path)
 474 {
 475         reporevlink("stats", name, title, class, head, NULL, path);
 476 }
 477
 478 static void cgit_self_link(char *name, const char *title, const char *class)
 479 {
 480         if (!strcmp(ctx.qry.page, "repolist"))
 481                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 482                                 ctx.qry.ofs, 1);
 483         else if (!strcmp(ctx.qry.page, "summary"))
 484                 cgit_summary_link(name, title, class, ctx.qry.head);
 485         else if (!strcmp(ctx.qry.page, "tag"))
 486                 cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
 487                                ctx.qry.sha1 : ctx.qry.head);
 488         else if (!strcmp(ctx.qry.page, "tree"))
 489                 cgit_tree_link(name, title, class, ctx.qry.head,
 490                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 491                                ctx.qry.path);
 492         else if (!strcmp(ctx.qry.page, "plain"))
 493                 cgit_plain_link(name, title, class, ctx.qry.head,
 494                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 495                                 ctx.qry.path);
 496         else if (!strcmp(ctx.qry.page, "blame"))
 497                 cgit_blame_link(name, title, class, ctx.qry.head,
 498                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 499                                 ctx.qry.path);
 500         else if (!strcmp(ctx.qry.page, "log"))
 501                 cgit_log_link(name, title, class, ctx.qry.head,
 502                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 503                               ctx.qry.path, ctx.qry.ofs,
 504                               ctx.qry.grep, ctx.qry.search,
 505                               ctx.qry.showmsg, ctx.qry.follow);
 506         else if (!strcmp(ctx.qry.page, "commit"))
 507                 cgit_commit_link(name, title, class, ctx.qry.head,
 508                                  ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 509                                  ctx.qry.path);
 510         else if (!strcmp(ctx.qry.page, "patch"))
 511                 cgit_patch_link(name, title, class, ctx.qry.head,
 512                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 513                                 ctx.qry.path);
 514         else if (!strcmp(ctx.qry.page, "refs"))
 515                 cgit_refs_link(name, title, class, ctx.qry.head,
 516                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 517                                ctx.qry.path);
 518         else if (!strcmp(ctx.qry.page, "snapshot"))
 519                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 520                                    ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 521                                    ctx.qry.path);
 522         else if (!strcmp(ctx.qry.page, "diff"))
 523                 cgit_diff_link(name, title, class, ctx.qry.head,
 524                                ctx.qry.sha1, ctx.qry.sha2,
 525                                ctx.qry.path);
 526         else if (!strcmp(ctx.qry.page, "stats"))
 527                 cgit_stats_link(name, title, class, ctx.qry.head,
 528                                 ctx.qry.path);
 529         else {
 530                 /* Don't known how to make link for this page */
 531                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 532                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 533                 html_txt(ctx.qry.page);
 534                 html("' -->");
 535                 html_txt(name);
 536                 html("</a>");
 537         }
 538 }
 539
 540 void cgit_object_link(struct object *obj)
 541 {
 542         char *page, *shortrev, *fullrev, *name;
 543
 544         fullrev = oid_to_hex(&obj->oid);
 545         shortrev = xstrdup(fullrev);
 546         shortrev[10] = '\0';
 547         if (obj->type == OBJ_COMMIT) {
 548                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 549                                  ctx.qry.head, fullrev, NULL);
 550                 return;
 551         } else if (obj->type == OBJ_TREE)
 552                 page = "tree";
 553         else if (obj->type == OBJ_TAG)
 554                 page = "tag";
 555         else
 556                 page = "blob";
 557         name = fmt("%s %s...", type_name(obj->type), shortrev);
 558         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 559 }
 560
 561 static struct string_list_item *lookup_path(struct string_list *list,
 562                                             const char *path)
 563 {
 564         struct string_list_item *item;
 565
 566         while (path && path[0]) {
 567                 if ((item = string_list_lookup(list, path)))
 568                         return item;
 569                 if (!(path = strchr(path, '/')))
 570                         break;
 571                 path++;
 572         }
 573         return NULL;
 574 }
 575
 576 void cgit_submodule_link(const char *class, char *path, const char *rev)
 577 {
 578         struct string_list *list;
 579         struct string_list_item *item;
 580         char tail, *dir;
 581         size_t len;
 582
 583         len = 0;
 584         tail = 0;
 585         list = &ctx.repo->submodules;
 586         item = lookup_path(list, path);
 587         if (!item) {
 588                 len = strlen(path);
 589                 tail = path[len - 1];
 590                 if (tail == '/') {
 591                         path[len - 1] = 0;
 592                         item = lookup_path(list, path);
 593                 }
 594         }
 595         if (item || ctx.repo->module_link) {
 596                 html("<a ");
 597                 if (class)
 598                         htmlf("class='%s' ", class);
 599                 html("href='");
 600                 if (item) {
 601                         html_attrf(item->util, rev);
 602                 } else {
 603                         dir = strrchr(path, '/');
 604                         if (dir)
 605                                 dir++;
 606                         else
 607                                 dir = path;
 608                         html_attrf(ctx.repo->module_link, dir, rev);
 609                 }
 610                 html("'>");
 611                 html_txt(path);
 612                 html("</a>");
 613         } else {
 614                 html("<span");
 615                 if (class)
 616                         htmlf(" class='%s'", class);
 617                 html(">");
 618                 html_txt(path);
 619                 html("</span>");
 620         }
 621         html_txtf(" @ %.7s", rev);
 622         if (item && tail)
 623                 path[len - 1] = tail;
 624 }
 625
 626 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 627 {
 628         static struct date_mode mode;
 629         mode.type = type;
 630         mode.local = ctx.cfg.local_time;
 631         return &mode;
 632 }
 633
 634 static void print_rel_date(time_t t, int tz, double value,
 635         const char *class, const char *suffix)
 636 {
 637         htmlf("<span class='%s' title='", class);
 638         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 639         htmlf("'>%.0f %s</span>", value, suffix);
 640 }
 641
 642 void cgit_print_age(time_t t, int tz, time_t max_relative)
 643 {
 644         time_t now, secs;
 645
 646         if (!t)
 647                 return;
 648         time(&now);
 649         secs = now - t;
 650         if (secs < 0)
 651                 secs = 0;
 652
 653         if (secs > max_relative && max_relative >= 0) {
 654                 html("<span title='");
 655                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 656                 html("'>");
 657                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 658                 html("</span>");
 659                 return;
 660         }
 661
 662         if (secs < TM_HOUR * 2) {
 663                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 664                 return;
 665         }
 666         if (secs < TM_DAY * 2) {
 667                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 668                 return;
 669         }
 670         if (secs < TM_WEEK * 2) {
 671                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 672                 return;
 673         }
 674         if (secs < TM_MONTH * 2) {
 675                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 676                 return;
 677         }
 678         if (secs < TM_YEAR * 2) {
 679                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 680                 return;
 681         }
 682         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 683 }
 684
 685 void cgit_print_http_headers(void)
 686 {
 687         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 688                 return;
 689
 690         if (ctx.page.status)
 691                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 692         if (ctx.page.mimetype && ctx.page.charset)
 693                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 694                       ctx.page.charset);
 695         else if (ctx.page.mimetype)
 696                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 697         if (ctx.page.size)
 698                 htmlf("Content-Length: %zd\n", ctx.page.size);
 699         if (ctx.page.filename) {
 700                 html("Content-Disposition: inline; filename=\"");
 701                 html_header_arg_in_quotes(ctx.page.filename);
 702                 html("\"\n");
 703         }
 704         if (!ctx.env.authenticated)
 705                 html("Cache-Control: no-cache, no-store\n");
 706         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 707         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 708         if (ctx.page.etag)
 709                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 710         html("\n");
 711         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 712                 exit(0);
 713 }
 714
 715 void cgit_redirect(const char *url, bool permanent)
 716 {
 717         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 718         html("Location: ");
 719         html_url_path(url);
 720         html("\n\n");
 721 }
 722
 723 static void print_rel_vcs_link(const char *url)
 724 {
 725         html("<link rel='vcs-git' href='");
 726         html_attr(url);
 727         html("' title='");
 728         html_attr(ctx.repo->name);
 729         html(" Git repository'/>\n");
 730 }
 731
 732 void cgit_print_docstart(void)
 733 {
 734         char *host = cgit_hosturl();
 735
 736         if (ctx.cfg.embedded) {
 737                 if (ctx.cfg.header)
 738                         html_include(ctx.cfg.header);
 739                 return;
 740         }
 741
 742         html(cgit_doctype);
 743         html("<html lang='en'>\n");
 744         html("<head>\n");
 745         html("<title>");
 746         html_txt(ctx.page.title);
 747         html("</title>\n");
 748         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 749         if (ctx.cfg.robots && *ctx.cfg.robots)
 750                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 751         html("<link rel='stylesheet' type='text/css' href='");
 752         html_attr(ctx.cfg.css);
 753         html("'/>\n");
 754         if (ctx.cfg.favicon) {
 755                 html("<link rel='shortcut icon' href='");
 756                 html_attr(ctx.cfg.favicon);
 757                 html("'/>\n");
 758         }
 759         if (host && ctx.repo && ctx.qry.head) {
 760                 char *fileurl;
 761                 struct strbuf sb = STRBUF_INIT;
 762                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 763
 764                 html("<link rel='alternate' title='Atom feed' href='");
 765                 html(cgit_httpscheme());
 766                 html_attr(host);
 767                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 768                                        sb.buf);
 769                 html_attr(fileurl);
 770                 html("' type='application/atom+xml'/>\n");
 771                 strbuf_release(&sb);
 772                 free(fileurl);
 773         }
 774         if (ctx.repo)
 775                 cgit_add_clone_urls(print_rel_vcs_link);
 776         if (ctx.cfg.head_include)
 777                 html_include(ctx.cfg.head_include);
 778         html("</head>\n");
 779         html("<body>\n");
 780         if (ctx.cfg.header)
 781                 html_include(ctx.cfg.header);
 782         free(host);
 783 }
 784
 785 void cgit_print_docend(void)
 786 {
 787         html("</div> <!-- class=content -->\n");
 788         if (ctx.cfg.embedded) {
 789                 html("</div> <!-- id=cgit -->\n");
 790                 if (ctx.cfg.footer)
 791                         html_include(ctx.cfg.footer);
 792                 return;
 793         }
 794         if (ctx.cfg.footer)
 795                 html_include(ctx.cfg.footer);
 796         else {
 797                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> "
 798                         "(<a href='https://git-scm.com/'>git %s</a>) at ", cgit_version, git_version_string);
 799                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 800                 html("</div>\n");
 801         }
 802         html("</div> <!-- id=cgit -->\n");
 803         html("</body>\n</html>\n");
 804 }
 805
 806 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 807 {
 808         va_list ap;
 809         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 810         ctx.page.status = code;
 811         ctx.page.statusmsg = msg;
 812         cgit_print_layout_start();
 813         va_start(ap, fmt);
 814         cgit_vprint_error(fmt, ap);
 815         va_end(ap);
 816         cgit_print_layout_end();
 817 }
 818
 819 void cgit_print_layout_start(void)
 820 {
 821         cgit_print_http_headers();
 822         cgit_print_docstart();
 823         cgit_print_pageheader();
 824 }
 825
 826 void cgit_print_layout_end(void)
 827 {
 828         cgit_print_docend();
 829 }
 830
 831 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 832 {
 833         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 834         int i;
 835
 836         for (i = 0; url_list[i]; i++) {
 837                 strbuf_rtrim(url_list[i]);
 838                 if (url_list[i]->len == 0)
 839                         continue;
 840                 if (suffix && *suffix)
 841                         strbuf_addf(url_list[i], "/%s", suffix);
 842                 fn(url_list[i]->buf);
 843         }
 844
 845         strbuf_list_free(url_list);
 846 }
 847
 848 void cgit_add_clone_urls(void (*fn)(const char *))
 849 {
 850         if (ctx.repo->clone_url)
 851                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 852         else if (ctx.cfg.clone_prefix)
 853                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 854 }
 855
 856 static int print_branch_option(const char *refname, const struct object_id *oid,
 857                                int flags, void *cb_data)
 858 {
 859         char *name = (char *)refname;
 860         html_option(name, name, ctx.qry.head);
 861         return 0;
 862 }
 863
 864 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 865                                 const char *page)
 866 {
 867         if (!ctx.cfg.virtual_root) {
 868                 struct strbuf url = STRBUF_INIT;
 869
 870                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 871                 if (ctx.qry.vpath)
 872                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 873                 html_hidden("url", url.buf);
 874                 strbuf_release(&url);
 875         }
 876
 877         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 878             strcmp(ctx.qry.head, ctx.repo->defbranch))
 879                 html_hidden("h", ctx.qry.head);
 880
 881         if (ctx.qry.sha1)
 882                 html_hidden("id", ctx.qry.sha1);
 883         if (ctx.qry.sha2)
 884                 html_hidden("id2", ctx.qry.sha2);
 885         if (ctx.qry.showmsg)
 886                 html_hidden("showmsg", "1");
 887
 888         if (incl_search) {
 889                 if (ctx.qry.grep)
 890                         html_hidden("qt", ctx.qry.grep);
 891                 if (ctx.qry.search)
 892                         html_hidden("q", ctx.qry.search);
 893         }
 894 }
 895
 896 static const char *hc(const char *page)
 897 {
 898         if (!ctx.qry.page)
 899                 return NULL;
 900
 901         return strcmp(ctx.qry.page, page) ? NULL : "active";
 902 }
 903
 904 static void cgit_print_path_crumbs(char *path)
 905 {
 906         char *old_path = ctx.qry.path;
 907         char *p = path, *q, *end = path + strlen(path);
 908
 909         ctx.qry.path = NULL;
 910         cgit_self_link("root", NULL, NULL);
 911         ctx.qry.path = p = path;
 912         while (p < end) {
 913                 if (!(q = strchr(p, '/')))
 914                         q = end;
 915                 *q = '\0';
 916                 html_txt("/");
 917                 cgit_self_link(p, NULL, NULL);
 918                 if (q < end)
 919                         *q = '/';
 920                 p = q + 1;
 921         }
 922         ctx.qry.path = old_path;
 923 }
 924
 925 static void print_header(void)
 926 {
 927         char *logo = NULL, *logo_link = NULL;
 928
 929         html("<table id='header'>\n");
 930         html("<tr>\n");
 931
 932         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 933                 logo = ctx.repo->logo;
 934         else
 935                 logo = ctx.cfg.logo;
 936         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 937                 logo_link = ctx.repo->logo_link;
 938         else
 939                 logo_link = ctx.cfg.logo_link;
 940         if (logo && *logo) {
 941                 html("<td class='logo' rowspan='2'><a href='");
 942                 if (logo_link && *logo_link)
 943                         html_attr(logo_link);
 944                 else
 945                         html_attr(cgit_rooturl());
 946                 html("'><img src='");
 947                 html_attr(logo);
 948                 html("' alt='cgit logo'/></a></td>\n");
 949         }
 950
 951         html("<td class='main'>");
 952         if (ctx.repo) {
 953                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 954                 html(" : ");
 955                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 956                 if (ctx.env.authenticated) {
 957                         html("</td><td class='form'>");
 958                         html("<form method='get'>\n");
 959                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
 960                         html("<select name='h' onchange='this.form.submit();'>\n");
 961                         for_each_branch_ref(print_branch_option, ctx.qry.head);
 962                         if (ctx.repo->enable_remote_branches)
 963                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
 964                         html("</select> ");
 965                         html("<input type='submit' value='switch'/>");
 966                         html("</form>");
 967                 }
 968         } else
 969                 html_txt(ctx.cfg.root_title);
 970         html("</td></tr>\n");
 971
 972         html("<tr><td class='sub'>");
 973         if (ctx.repo) {
 974                 html_txt(ctx.repo->desc);
 975                 html("</td><td class='sub right'>");
 976                 html_txt(ctx.repo->owner);
 977         } else {
 978                 if (ctx.cfg.root_desc)
 979                         html_txt(ctx.cfg.root_desc);
 980         }
 981         html("</td></tr></table>\n");
 982 }
 983
 984 void cgit_print_pageheader(void)
 985 {
 986         html("<div id='cgit'>");
 987         if (!ctx.env.authenticated || !ctx.cfg.noheader)
 988                 print_header();
 989
 990         html("<table class='tabs'><tr><td>\n");
 991         if (ctx.env.authenticated && ctx.repo) {
 992                 if (ctx.repo->readme.nr)
 993                         reporevlink("about", "about", NULL,
 994                                     hc("about"), ctx.qry.head, NULL,
 995                                     NULL);
 996                 cgit_summary_link("summary", NULL, hc("summary"),
 997                                   ctx.qry.head);
 998                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
 999                                ctx.qry.sha1, NULL);
1000                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
1001                               NULL, ctx.qry.vpath, 0, NULL, NULL,
1002                               ctx.qry.showmsg, ctx.qry.follow);
1003                 if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
1004                         cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
1005                                         ctx.qry.sha1, ctx.qry.vpath);
1006                 else
1007                         cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
1008                                        ctx.qry.sha1, ctx.qry.vpath);
1009                 cgit_commit_link("commit", NULL, hc("commit"),
1010                                  ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
1011                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
1012                                ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
1013                 if (ctx.repo->max_stats)
1014                         cgit_stats_link("stats", NULL, hc("stats"),
1015                                         ctx.qry.head, ctx.qry.vpath);
1016                 if (ctx.repo->homepage) {
1017                         html("<a href='");
1018                         html_attr(ctx.repo->homepage);
1019                         html("'>homepage</a>");
1020                 }
1021                 html("</td><td class='form'>");
1022                 html("<form class='right' method='get' action='");
1023                 if (ctx.cfg.virtual_root) {
1024                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1025                                                    ctx.qry.vpath, NULL);
1026                         html_url_path(fileurl);
1027                         free(fileurl);
1028                 }
1029                 html("'>\n");
1030                 cgit_add_hidden_formfields(1, 0, "log");
1031                 html("<select name='qt'>\n");
1032                 html_option("grep", "log msg", ctx.qry.grep);
1033                 html_option("author", "author", ctx.qry.grep);
1034                 html_option("committer", "committer", ctx.qry.grep);
1035                 html_option("range", "range", ctx.qry.grep);
1036                 html("</select>\n");
1037                 html("<input class='txt' type='search' size='10' name='q' value='");
1038                 html_attr(ctx.qry.search);
1039                 html("'/>\n");
1040                 html("<input type='submit' value='search'/>\n");
1041                 html("</form>\n");
1042         } else if (ctx.env.authenticated) {
1043                 char *currenturl = cgit_currenturl();
1044                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1045                 if (ctx.cfg.root_readme)
1046                         site_link("about", "about", NULL, hc("about"),
1047                                   NULL, NULL, 0, 1);
1048                 html("</td><td class='form'>");
1049                 html("<form method='get' action='");
1050                 html_attr(currenturl);
1051                 html("'>\n");
1052                 html("<input type='search' name='q' size='10' value='");
1053                 html_attr(ctx.qry.search);
1054                 html("'/>\n");
1055                 html("<input type='submit' value='search'/>\n");
1056                 html("</form>");
1057                 free(currenturl);
1058         }
1059         html("</td></tr></table>\n");
1060         if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
1061                 html("<div class='path'>");
1062                 html("path: ");
1063                 cgit_print_path_crumbs(ctx.qry.vpath);
1064                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1065                         html(" (");
1066                         ctx.qry.follow = !ctx.qry.follow;
1067                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1068                                         NULL, NULL);
1069                         ctx.qry.follow = !ctx.qry.follow;
1070                         html(")");
1071                 }
1072                 html("</div>");
1073         }
1074         html("<div class='content'>");
1075 }
1076
1077 void cgit_print_filemode(unsigned short mode)
1078 {
1079         if (S_ISDIR(mode))
1080                 html("d");
1081         else if (S_ISLNK(mode))
1082                 html("l");
1083         else if (S_ISGITLINK(mode))
1084                 html("m");
1085         else
1086                 html("-");
1087         html_fileperm(mode >> 6);
1088         html_fileperm(mode >> 3);
1089         html_fileperm(mode);
1090 }
1091
1092 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1093                                   const char *ref)
1094 {
1095         struct object_id oid;
1096
1097         /*
1098          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1099          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1100          * i.e. each stripped tag can be inverted without ambiguities.
1101          */
1102         if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
1103             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1104             ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
1105              (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
1106              (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
1107                 ref++;
1108
1109         strbuf_addf(filename, "%s-%s", base, ref);
1110 }
1111
1112 void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
1113                                const char *separator)
1114 {
1115         const struct cgit_snapshot_format* f;
1116         struct strbuf filename = STRBUF_INIT;
1117         const char *basename;
1118         size_t prefixlen;
1119
1120         basename = cgit_snapshot_prefix(repo);
1121         if (starts_with(ref, basename))
1122                 strbuf_addstr(&filename, ref);
1123         else
1124                 cgit_compose_snapshot_prefix(&filename, basename, ref);
1125
1126         prefixlen = filename.len;
1127         for (f = cgit_snapshot_formats; f->suffix; f++) {
1128                 if (!(repo->snapshots & cgit_snapshot_format_bit(f)))
1129                         continue;
1130                 strbuf_setlen(&filename, prefixlen);
1131                 strbuf_addstr(&filename, f->suffix);
1132                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1133                                    filename.buf);
1134                 if (cgit_snapshot_get_sig(ref, f)) {
1135                         strbuf_addstr(&filename, ".asc");
1136                         html(" (");
1137                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1138                                            filename.buf);
1139                         html(")");
1140                 }
1141                 html(separator);
1142         }
1143         strbuf_release(&filename);
1144 }
1145
1146 void cgit_set_title_from_path(const char *path)
1147 {
1148         size_t path_len, path_index, path_last_end;
1149         char *new_title;
1150
1151         if (!path)
1152                 return;
1153
1154         path_len = strlen(path);
1155         new_title = xmalloc(path_len + 3 + strlen(ctx.page.title) + 1);
1156         new_title[0] = '\0';
1157
1158         for (path_index = path_len, path_last_end = path_len; path_index-- > 0;) {
1159                 if (path[path_index] == '/') {
1160                         if (path_index == path_len - 1) {
1161                                 path_last_end = path_index - 1;
1162                                 continue;
1163                         }
1164                         strncat(new_title, &path[path_index + 1], path_last_end - path_index - 1);
1165                         strcat(new_title, "\\");
1166                         path_last_end = path_index;
1167                 }
1168         }
1169         if (path_last_end)
1170                 strncat(new_title, path, path_last_end);
1171
1172         strcat(new_title, " - ");
1173         strcat(new_title, ctx.page.title);
1174         ctx.page.title = new_title;
1175 }