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         size_t len;
 137
 138         len = strlcpy(rvbuf, reponame, sizeof(rvbuf));
 139         if (len >= sizeof(rvbuf))
 140                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 141         p = len - 1;
 142         /* strip trailing slashes */
 143         while (p && rvbuf[p] == '/')
 144                 rvbuf[p--] = '\0';
 145         /* strip trailing .git */
 146         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 147                 p -= 3;
 148                 rvbuf[p--] = '\0';
 149         }
 150         /* strip more trailing slashes if any */
 151         while (p && rvbuf[p] == '/')
 152                 rvbuf[p--] = '\0';
 153         /* find last slash in the remaining string */
 154         rv = strrchr(rvbuf, '/');
 155         if (rv)
 156                 return ++rv;
 157         return rvbuf;
 158 }
 159
 160 const char *cgit_snapshot_prefix(const struct cgit_repo *repo)
 161 {
 162         if (repo->snapshot_prefix)
 163                 return repo->snapshot_prefix;
 164
 165         return cgit_repobasename(repo->url);
 166 }
 167
 168 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 169 {
 170         char *delim = "?";
 171
 172         if (always_root || page)
 173                 html_attr(cgit_rooturl());
 174         else {
 175                 char *currenturl = cgit_currenturl();
 176                 html_attr(currenturl);
 177                 free(currenturl);
 178         }
 179
 180         if (page) {
 181                 htmlf("?p=%s", page);
 182                 delim = "&amp;";
 183         }
 184         if (search) {
 185                 html(delim);
 186                 html("q=");
 187                 html_attr(search);
 188                 delim = "&amp;";
 189         }
 190         if (sort) {
 191                 html(delim);
 192                 html("s=");
 193                 html_attr(sort);
 194                 delim = "&amp;";
 195         }
 196         if (ofs) {
 197                 html(delim);
 198                 htmlf("ofs=%d", ofs);
 199         }
 200 }
 201
 202 static void site_link(const char *page, const char *name, const char *title,
 203                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 204 {
 205         html("<a");
 206         if (title) {
 207                 html(" title='");
 208                 html_attr(title);
 209                 html("'");
 210         }
 211         if (class) {
 212                 html(" class='");
 213                 html_attr(class);
 214                 html("'");
 215         }
 216         html(" href='");
 217         site_url(page, search, sort, ofs, always_root);
 218         html("'>");
 219         html_txt(name);
 220         html("</a>");
 221 }
 222
 223 void cgit_index_link(const char *name, const char *title, const char *class,
 224                      const char *pattern, const char *sort, int ofs, int always_root)
 225 {
 226         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 227 }
 228
 229 static char *repolink(const char *title, const char *class, const char *page,
 230                       const char *head, const char *path)
 231 {
 232         char *delim = "?";
 233
 234         html("<a");
 235         if (title) {
 236                 html(" title='");
 237                 html_attr(title);
 238                 html("'");
 239         }
 240         if (class) {
 241                 html(" class='");
 242                 html_attr(class);
 243                 html("'");
 244         }
 245         html(" href='");
 246         if (ctx.cfg.virtual_root) {
 247                 html_url_path(ctx.cfg.virtual_root);
 248                 html_url_path(ctx.repo->url);
 249                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 250                         html("/");
 251                 if (page) {
 252                         html_url_path(page);
 253                         html("/");
 254                         if (path)
 255                                 html_url_path(path);
 256                 }
 257         } else {
 258                 html_url_path(ctx.cfg.script_name);
 259                 html("?url=");
 260                 html_url_arg(ctx.repo->url);
 261                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 262                         html("/");
 263                 if (page) {
 264                         html_url_arg(page);
 265                         html("/");
 266                         if (path)
 267                                 html_url_arg(path);
 268                 }
 269                 delim = "&amp;";
 270         }
 271         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 272                 html(delim);
 273                 html("h=");
 274                 html_url_arg(head);
 275                 delim = "&amp;";
 276         }
 277         return fmt("%s", delim);
 278 }
 279
 280 static void reporevlink(const char *page, const char *name, const char *title,
 281                         const char *class, const char *head, const char *rev,
 282                         const char *path)
 283 {
 284         char *delim;
 285
 286         delim = repolink(title, class, page, head, path);
 287         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 288                 html(delim);
 289                 html("id=");
 290                 html_url_arg(rev);
 291         }
 292         html("'>");
 293         html_txt(name);
 294         html("</a>");
 295 }
 296
 297 void cgit_summary_link(const char *name, const char *title, const char *class,
 298                        const char *head)
 299 {
 300         reporevlink(NULL, name, title, class, head, NULL, NULL);
 301 }
 302
 303 void cgit_tag_link(const char *name, const char *title, const char *class,
 304                    const char *tag)
 305 {
 306         reporevlink("tag", name, title, class, tag, NULL, NULL);
 307 }
 308
 309 void cgit_tree_link(const char *name, const char *title, const char *class,
 310                     const char *head, const char *rev, const char *path)
 311 {
 312         reporevlink("tree", name, title, class, head, rev, path);
 313 }
 314
 315 void cgit_plain_link(const char *name, const char *title, const char *class,
 316                      const char *head, const char *rev, const char *path)
 317 {
 318         reporevlink("plain", name, title, class, head, rev, path);
 319 }
 320
 321 void cgit_blame_link(const char *name, const char *title, const char *class,
 322                      const char *head, const char *rev, const char *path)
 323 {
 324         reporevlink("blame", name, title, class, head, rev, path);
 325 }
 326
 327 void cgit_log_link(const char *name, const char *title, const char *class,
 328                    const char *head, const char *rev, const char *path,
 329                    int ofs, const char *grep, const char *pattern, int showmsg,
 330                    int follow)
 331 {
 332         char *delim;
 333
 334         delim = repolink(title, class, "log", head, path);
 335         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 336                 html(delim);
 337                 html("id=");
 338                 html_url_arg(rev);
 339                 delim = "&amp;";
 340         }
 341         if (grep && pattern) {
 342                 html(delim);
 343                 html("qt=");
 344                 html_url_arg(grep);
 345                 delim = "&amp;";
 346                 html(delim);
 347                 html("q=");
 348                 html_url_arg(pattern);
 349         }
 350         if (ofs > 0) {
 351                 html(delim);
 352                 html("ofs=");
 353                 htmlf("%d", ofs);
 354                 delim = "&amp;";
 355         }
 356         if (showmsg) {
 357                 html(delim);
 358                 html("showmsg=1");
 359                 delim = "&amp;";
 360         }
 361         if (follow) {
 362                 html(delim);
 363                 html("follow=1");
 364         }
 365         html("'>");
 366         html_txt(name);
 367         html("</a>");
 368 }
 369
 370 void cgit_commit_link(const char *name, const char *title, const char *class,
 371                       const char *head, const char *rev, const char *path)
 372 {
 373         char *delim;
 374
 375         delim = repolink(title, class, "commit", head, path);
 376         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 377                 html(delim);
 378                 html("id=");
 379                 html_url_arg(rev);
 380                 delim = "&amp;";
 381         }
 382         if (ctx.qry.difftype) {
 383                 html(delim);
 384                 htmlf("dt=%d", ctx.qry.difftype);
 385                 delim = "&amp;";
 386         }
 387         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 388                 html(delim);
 389                 html("context=");
 390                 htmlf("%d", ctx.qry.context);
 391                 delim = "&amp;";
 392         }
 393         if (ctx.qry.ignorews) {
 394                 html(delim);
 395                 html("ignorews=1");
 396                 delim = "&amp;";
 397         }
 398         if (ctx.qry.follow) {
 399                 html(delim);
 400                 html("follow=1");
 401         }
 402         html("'>");
 403         if (name[0] != '\0') {
 404                 if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 405                         html_ntxt(name, ctx.cfg.max_msg_len - 3);
 406                         html("...");
 407                 } else
 408                         html_txt(name);
 409         } else
 410                 html_txt("(no commit message)");
 411         html("</a>");
 412 }
 413
 414 void cgit_refs_link(const char *name, const char *title, const char *class,
 415                     const char *head, const char *rev, const char *path)
 416 {
 417         reporevlink("refs", name, title, class, head, rev, path);
 418 }
 419
 420 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 421                         const char *head, const char *rev,
 422                         const char *archivename)
 423 {
 424         reporevlink("snapshot", name, title, class, head, rev, archivename);
 425 }
 426
 427 void cgit_diff_link(const char *name, const char *title, const char *class,
 428                     const char *head, const char *new_rev, const char *old_rev,
 429                     const char *path)
 430 {
 431         char *delim;
 432
 433         delim = repolink(title, class, "diff", head, path);
 434         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 435                 html(delim);
 436                 html("id=");
 437                 html_url_arg(new_rev);
 438                 delim = "&amp;";
 439         }
 440         if (old_rev) {
 441                 html(delim);
 442                 html("id2=");
 443                 html_url_arg(old_rev);
 444                 delim = "&amp;";
 445         }
 446         if (ctx.qry.difftype) {
 447                 html(delim);
 448                 htmlf("dt=%d", ctx.qry.difftype);
 449                 delim = "&amp;";
 450         }
 451         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 452                 html(delim);
 453                 html("context=");
 454                 htmlf("%d", ctx.qry.context);
 455                 delim = "&amp;";
 456         }
 457         if (ctx.qry.ignorews) {
 458                 html(delim);
 459                 html("ignorews=1");
 460                 delim = "&amp;";
 461         }
 462         if (ctx.qry.follow) {
 463                 html(delim);
 464                 html("follow=1");
 465         }
 466         html("'>");
 467         html_txt(name);
 468         html("</a>");
 469 }
 470
 471 void cgit_patch_link(const char *name, const char *title, const char *class,
 472                      const char *head, const char *rev, const char *path)
 473 {
 474         reporevlink("patch", name, title, class, head, rev, path);
 475 }
 476
 477 void cgit_stats_link(const char *name, const char *title, const char *class,
 478                      const char *head, const char *path)
 479 {
 480         reporevlink("stats", name, title, class, head, NULL, path);
 481 }
 482
 483 static void cgit_self_link(char *name, const char *title, const char *class)
 484 {
 485         if (!strcmp(ctx.qry.page, "repolist"))
 486                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 487                                 ctx.qry.ofs, 1);
 488         else if (!strcmp(ctx.qry.page, "summary"))
 489                 cgit_summary_link(name, title, class, ctx.qry.head);
 490         else if (!strcmp(ctx.qry.page, "tag"))
 491                 cgit_tag_link(name, title, class, ctx.qry.has_sha1 ?
 492                                ctx.qry.sha1 : ctx.qry.head);
 493         else if (!strcmp(ctx.qry.page, "tree"))
 494                 cgit_tree_link(name, title, class, ctx.qry.head,
 495                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 496                                ctx.qry.path);
 497         else if (!strcmp(ctx.qry.page, "plain"))
 498                 cgit_plain_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, "blame"))
 502                 cgit_blame_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, "log"))
 506                 cgit_log_link(name, title, class, ctx.qry.head,
 507                               ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 508                               ctx.qry.path, ctx.qry.ofs,
 509                               ctx.qry.grep, ctx.qry.search,
 510                               ctx.qry.showmsg, ctx.qry.follow);
 511         else if (!strcmp(ctx.qry.page, "commit"))
 512                 cgit_commit_link(name, title, class, ctx.qry.head,
 513                                  ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 514                                  ctx.qry.path);
 515         else if (!strcmp(ctx.qry.page, "patch"))
 516                 cgit_patch_link(name, title, class, ctx.qry.head,
 517                                 ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 518                                 ctx.qry.path);
 519         else if (!strcmp(ctx.qry.page, "refs"))
 520                 cgit_refs_link(name, title, class, ctx.qry.head,
 521                                ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 522                                ctx.qry.path);
 523         else if (!strcmp(ctx.qry.page, "snapshot"))
 524                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 525                                    ctx.qry.has_sha1 ? ctx.qry.sha1 : NULL,
 526                                    ctx.qry.path);
 527         else if (!strcmp(ctx.qry.page, "diff"))
 528                 cgit_diff_link(name, title, class, ctx.qry.head,
 529                                ctx.qry.sha1, ctx.qry.sha2,
 530                                ctx.qry.path);
 531         else if (!strcmp(ctx.qry.page, "stats"))
 532                 cgit_stats_link(name, title, class, ctx.qry.head,
 533                                 ctx.qry.path);
 534         else {
 535                 /* Don't known how to make link for this page */
 536                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 537                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 538                 html_txt(ctx.qry.page);
 539                 html("' -->");
 540                 html_txt(name);
 541                 html("</a>");
 542         }
 543 }
 544
 545 void cgit_object_link(struct object *obj)
 546 {
 547         char *page, *shortrev, *fullrev, *name;
 548
 549         fullrev = oid_to_hex(&obj->oid);
 550         shortrev = xstrdup(fullrev);
 551         shortrev[10] = '\0';
 552         if (obj->type == OBJ_COMMIT) {
 553                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 554                                  ctx.qry.head, fullrev, NULL);
 555                 return;
 556         } else if (obj->type == OBJ_TREE)
 557                 page = "tree";
 558         else if (obj->type == OBJ_TAG)
 559                 page = "tag";
 560         else
 561                 page = "blob";
 562         name = fmt("%s %s...", type_name(obj->type), shortrev);
 563         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 564 }
 565
 566 static struct string_list_item *lookup_path(struct string_list *list,
 567                                             const char *path)
 568 {
 569         struct string_list_item *item;
 570
 571         while (path && path[0]) {
 572                 if ((item = string_list_lookup(list, path)))
 573                         return item;
 574                 if (!(path = strchr(path, '/')))
 575                         break;
 576                 path++;
 577         }
 578         return NULL;
 579 }
 580
 581 void cgit_submodule_link(const char *class, char *path, const char *rev)
 582 {
 583         struct string_list *list;
 584         struct string_list_item *item;
 585         char tail, *dir;
 586         size_t len;
 587
 588         len = 0;
 589         tail = 0;
 590         list = &ctx.repo->submodules;
 591         item = lookup_path(list, path);
 592         if (!item) {
 593                 len = strlen(path);
 594                 tail = path[len - 1];
 595                 if (tail == '/') {
 596                         path[len - 1] = 0;
 597                         item = lookup_path(list, path);
 598                 }
 599         }
 600         if (item || ctx.repo->module_link) {
 601                 html("<a ");
 602                 if (class)
 603                         htmlf("class='%s' ", class);
 604                 html("href='");
 605                 if (item) {
 606                         html_attrf(item->util, rev);
 607                 } else {
 608                         dir = strrchr(path, '/');
 609                         if (dir)
 610                                 dir++;
 611                         else
 612                                 dir = path;
 613                         html_attrf(ctx.repo->module_link, dir, rev);
 614                 }
 615                 html("'>");
 616                 html_txt(path);
 617                 html("</a>");
 618         } else {
 619                 html("<span");
 620                 if (class)
 621                         htmlf(" class='%s'", class);
 622                 html(">");
 623                 html_txt(path);
 624                 html("</span>");
 625         }
 626         html_txtf(" @ %.7s", rev);
 627         if (item && tail)
 628                 path[len - 1] = tail;
 629 }
 630
 631 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 632 {
 633         static struct date_mode mode;
 634         mode.type = type;
 635         mode.local = ctx.cfg.local_time;
 636         return &mode;
 637 }
 638
 639 static void print_rel_date(time_t t, int tz, double value,
 640         const char *class, const char *suffix)
 641 {
 642         htmlf("<span class='%s' title='", class);
 643         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 644         htmlf("'>%.0f %s</span>", value, suffix);
 645 }
 646
 647 void cgit_print_age(time_t t, int tz, time_t max_relative)
 648 {
 649         time_t now, secs;
 650
 651         if (!t)
 652                 return;
 653         time(&now);
 654         secs = now - t;
 655         if (secs < 0)
 656                 secs = 0;
 657
 658         if (secs > max_relative && max_relative >= 0) {
 659                 html("<span title='");
 660                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 661                 html("'>");
 662                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 663                 html("</span>");
 664                 return;
 665         }
 666
 667         if (secs < TM_HOUR * 2) {
 668                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 669                 return;
 670         }
 671         if (secs < TM_DAY * 2) {
 672                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 673                 return;
 674         }
 675         if (secs < TM_WEEK * 2) {
 676                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 677                 return;
 678         }
 679         if (secs < TM_MONTH * 2) {
 680                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 681                 return;
 682         }
 683         if (secs < TM_YEAR * 2) {
 684                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 685                 return;
 686         }
 687         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 688 }
 689
 690 void cgit_print_http_headers(void)
 691 {
 692         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 693                 return;
 694
 695         if (ctx.page.status)
 696                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 697         if (ctx.page.mimetype && ctx.page.charset)
 698                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 699                       ctx.page.charset);
 700         else if (ctx.page.mimetype)
 701                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 702         if (ctx.page.size)
 703                 htmlf("Content-Length: %zd\n", ctx.page.size);
 704         if (ctx.page.filename) {
 705                 html("Content-Disposition: inline; filename=\"");
 706                 html_header_arg_in_quotes(ctx.page.filename);
 707                 html("\"\n");
 708         }
 709         if (!ctx.env.authenticated)
 710                 html("Cache-Control: no-cache, no-store\n");
 711         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 712         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 713         if (ctx.page.etag)
 714                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 715         html("\n");
 716         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 717                 exit(0);
 718 }
 719
 720 void cgit_redirect(const char *url, bool permanent)
 721 {
 722         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 723         html("Location: ");
 724         html_url_path(url);
 725         html("\n\n");
 726 }
 727
 728 static void print_rel_vcs_link(const char *url)
 729 {
 730         html("<link rel='vcs-git' href='");
 731         html_attr(url);
 732         html("' title='");
 733         html_attr(ctx.repo->name);
 734         html(" Git repository'/>\n");
 735 }
 736
 737 void cgit_print_docstart(void)
 738 {
 739         char *host = cgit_hosturl();
 740
 741         if (ctx.cfg.embedded) {
 742                 if (ctx.cfg.header)
 743                         html_include(ctx.cfg.header);
 744                 return;
 745         }
 746
 747         html(cgit_doctype);
 748         html("<html lang='en'>\n");
 749         html("<head>\n");
 750         html("<title>");
 751         html_txt(ctx.page.title);
 752         html("</title>\n");
 753         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 754         if (ctx.cfg.robots && *ctx.cfg.robots)
 755                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 756         html("<link rel='stylesheet' type='text/css' href='");
 757         html_attr(ctx.cfg.css);
 758         html("'/>\n");
 759         if (ctx.cfg.favicon) {
 760                 html("<link rel='shortcut icon' href='");
 761                 html_attr(ctx.cfg.favicon);
 762                 html("'/>\n");
 763         }
 764         if (host && ctx.repo && ctx.qry.head) {
 765                 char *fileurl;
 766                 struct strbuf sb = STRBUF_INIT;
 767                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 768
 769                 html("<link rel='alternate' title='Atom feed' href='");
 770                 html(cgit_httpscheme());
 771                 html_attr(host);
 772                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 773                                        sb.buf);
 774                 html_attr(fileurl);
 775                 html("' type='application/atom+xml'/>\n");
 776                 strbuf_release(&sb);
 777                 free(fileurl);
 778         }
 779         if (ctx.repo)
 780                 cgit_add_clone_urls(print_rel_vcs_link);
 781         if (ctx.cfg.head_include)
 782                 html_include(ctx.cfg.head_include);
 783         if (ctx.repo && ctx.repo->extra_head_content)
 784                 html(ctx.repo->extra_head_content);
 785         html("</head>\n");
 786         html("<body>\n");
 787         if (ctx.cfg.header)
 788                 html_include(ctx.cfg.header);
 789         free(host);
 790 }
 791
 792 void cgit_print_docend(void)
 793 {
 794         html("</div> <!-- class=content -->\n");
 795         if (ctx.cfg.embedded) {
 796                 html("</div> <!-- id=cgit -->\n");
 797                 if (ctx.cfg.footer)
 798                         html_include(ctx.cfg.footer);
 799                 return;
 800         }
 801         if (ctx.cfg.footer)
 802                 html_include(ctx.cfg.footer);
 803         else {
 804                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> "
 805                         "(<a href='https://git-scm.com/'>git %s</a>) at ", cgit_version, git_version_string);
 806                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 807                 html("</div>\n");
 808         }
 809         html("</div> <!-- id=cgit -->\n");
 810         html("</body>\n</html>\n");
 811 }
 812
 813 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 814 {
 815         va_list ap;
 816         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 817         ctx.page.status = code;
 818         ctx.page.statusmsg = msg;
 819         cgit_print_layout_start();
 820         va_start(ap, fmt);
 821         cgit_vprint_error(fmt, ap);
 822         va_end(ap);
 823         cgit_print_layout_end();
 824 }
 825
 826 void cgit_print_layout_start(void)
 827 {
 828         cgit_print_http_headers();
 829         cgit_print_docstart();
 830         cgit_print_pageheader();
 831 }
 832
 833 void cgit_print_layout_end(void)
 834 {
 835         cgit_print_docend();
 836 }
 837
 838 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 839 {
 840         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 841         int i;
 842
 843         for (i = 0; url_list[i]; i++) {
 844                 strbuf_rtrim(url_list[i]);
 845                 if (url_list[i]->len == 0)
 846                         continue;
 847                 if (suffix && *suffix)
 848                         strbuf_addf(url_list[i], "/%s", suffix);
 849                 fn(url_list[i]->buf);
 850         }
 851
 852         strbuf_list_free(url_list);
 853 }
 854
 855 void cgit_add_clone_urls(void (*fn)(const char *))
 856 {
 857         if (ctx.repo->clone_url)
 858                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 859         else if (ctx.cfg.clone_prefix)
 860                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 861 }
 862
 863 static int print_branch_option(const char *refname, const struct object_id *oid,
 864                                int flags, void *cb_data)
 865 {
 866         char *name = (char *)refname;
 867         html_option(name, name, ctx.qry.head);
 868         return 0;
 869 }
 870
 871 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 872                                 const char *page)
 873 {
 874         if (!ctx.cfg.virtual_root) {
 875                 struct strbuf url = STRBUF_INIT;
 876
 877                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 878                 if (ctx.qry.vpath)
 879                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 880                 html_hidden("url", url.buf);
 881                 strbuf_release(&url);
 882         }
 883
 884         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 885             strcmp(ctx.qry.head, ctx.repo->defbranch))
 886                 html_hidden("h", ctx.qry.head);
 887
 888         if (ctx.qry.sha1)
 889                 html_hidden("id", ctx.qry.sha1);
 890         if (ctx.qry.sha2)
 891                 html_hidden("id2", ctx.qry.sha2);
 892         if (ctx.qry.showmsg)
 893                 html_hidden("showmsg", "1");
 894
 895         if (incl_search) {
 896                 if (ctx.qry.grep)
 897                         html_hidden("qt", ctx.qry.grep);
 898                 if (ctx.qry.search)
 899                         html_hidden("q", ctx.qry.search);
 900         }
 901 }
 902
 903 static const char *hc(const char *page)
 904 {
 905         if (!ctx.qry.page)
 906                 return NULL;
 907
 908         return strcmp(ctx.qry.page, page) ? NULL : "active";
 909 }
 910
 911 static void cgit_print_path_crumbs(char *path)
 912 {
 913         char *old_path = ctx.qry.path;
 914         char *p = path, *q, *end = path + strlen(path);
 915
 916         ctx.qry.path = NULL;
 917         cgit_self_link("root", NULL, NULL);
 918         ctx.qry.path = p = path;
 919         while (p < end) {
 920                 if (!(q = strchr(p, '/')))
 921                         q = end;
 922                 *q = '\0';
 923                 html_txt("/");
 924                 cgit_self_link(p, NULL, NULL);
 925                 if (q < end)
 926                         *q = '/';
 927                 p = q + 1;
 928         }
 929         ctx.qry.path = old_path;
 930 }
 931
 932 static void print_header(void)
 933 {
 934         char *logo = NULL, *logo_link = NULL;
 935
 936         html("<table id='header'>\n");
 937         html("<tr>\n");
 938
 939         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 940                 logo = ctx.repo->logo;
 941         else
 942                 logo = ctx.cfg.logo;
 943         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 944                 logo_link = ctx.repo->logo_link;
 945         else
 946                 logo_link = ctx.cfg.logo_link;
 947         if (logo && *logo) {
 948                 html("<td class='logo' rowspan='2'><a href='");
 949                 if (logo_link && *logo_link)
 950                         html_attr(logo_link);
 951                 else
 952                         html_attr(cgit_rooturl());
 953                 html("'><img src='");
 954                 html_attr(logo);
 955                 html("' alt='cgit logo'/></a></td>\n");
 956         }
 957
 958         html("<td class='main'>");
 959         if (ctx.repo) {
 960                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 961                 html(" : ");
 962                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 963                 if (ctx.env.authenticated) {
 964                         html("</td><td class='form'>");
 965                         html("<form method='get'>\n");
 966                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
 967                         html("<select name='h' onchange='this.form.submit();'>\n");
 968                         for_each_branch_ref(print_branch_option, ctx.qry.head);
 969                         if (ctx.repo->enable_remote_branches)
 970                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
 971                         html("</select> ");
 972                         html("<input type='submit' value='switch'/>");
 973                         html("</form>");
 974                 }
 975         } else
 976                 html_txt(ctx.cfg.root_title);
 977         html("</td></tr>\n");
 978
 979         html("<tr><td class='sub'>");
 980         if (ctx.repo) {
 981                 html_txt(ctx.repo->desc);
 982                 html("</td><td class='sub right'>");
 983                 html_txt(ctx.repo->owner);
 984         } else {
 985                 if (ctx.cfg.root_desc)
 986                         html_txt(ctx.cfg.root_desc);
 987         }
 988         html("</td></tr></table>\n");
 989 }
 990
 991 void cgit_print_pageheader(void)
 992 {
 993         html("<div id='cgit'>");
 994         if (!ctx.env.authenticated || !ctx.cfg.noheader)
 995                 print_header();
 996
 997         html("<table class='tabs'><tr><td>\n");
 998         if (ctx.env.authenticated && ctx.repo) {
 999                 if (ctx.repo->readme.nr)
1000                         reporevlink("about", "about", NULL,
1001                                     hc("about"), ctx.qry.head, NULL,
1002                                     NULL);
1003                 cgit_summary_link("summary", NULL, hc("summary"),
1004                                   ctx.qry.head);
1005                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
1006                                ctx.qry.sha1, NULL);
1007                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
1008                               NULL, ctx.qry.vpath, 0, NULL, NULL,
1009                               ctx.qry.showmsg, ctx.qry.follow);
1010                 if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
1011                         cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
1012                                         ctx.qry.sha1, ctx.qry.vpath);
1013                 else
1014                         cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
1015                                        ctx.qry.sha1, ctx.qry.vpath);
1016                 cgit_commit_link("commit", NULL, hc("commit"),
1017                                  ctx.qry.head, ctx.qry.sha1, ctx.qry.vpath);
1018                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
1019                                ctx.qry.sha1, ctx.qry.sha2, ctx.qry.vpath);
1020                 if (ctx.repo->max_stats)
1021                         cgit_stats_link("stats", NULL, hc("stats"),
1022                                         ctx.qry.head, ctx.qry.vpath);
1023                 if (ctx.repo->homepage) {
1024                         html("<a href='");
1025                         html_attr(ctx.repo->homepage);
1026                         html("'>homepage</a>");
1027                 }
1028                 html("</td><td class='form'>");
1029                 html("<form class='right' method='get' action='");
1030                 if (ctx.cfg.virtual_root) {
1031                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1032                                                    ctx.qry.vpath, NULL);
1033                         html_url_path(fileurl);
1034                         free(fileurl);
1035                 }
1036                 html("'>\n");
1037                 cgit_add_hidden_formfields(1, 0, "log");
1038                 html("<select name='qt'>\n");
1039                 html_option("grep", "log msg", ctx.qry.grep);
1040                 html_option("author", "author", ctx.qry.grep);
1041                 html_option("committer", "committer", ctx.qry.grep);
1042                 html_option("range", "range", ctx.qry.grep);
1043                 html("</select>\n");
1044                 html("<input class='txt' type='search' size='10' name='q' value='");
1045                 html_attr(ctx.qry.search);
1046                 html("'/>\n");
1047                 html("<input type='submit' value='search'/>\n");
1048                 html("</form>\n");
1049         } else if (ctx.env.authenticated) {
1050                 char *currenturl = cgit_currenturl();
1051                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1052                 if (ctx.cfg.root_readme)
1053                         site_link("about", "about", NULL, hc("about"),
1054                                   NULL, NULL, 0, 1);
1055                 html("</td><td class='form'>");
1056                 html("<form method='get' action='");
1057                 html_attr(currenturl);
1058                 html("'>\n");
1059                 html("<input type='search' name='q' size='10' value='");
1060                 html_attr(ctx.qry.search);
1061                 html("'/>\n");
1062                 html("<input type='submit' value='search'/>\n");
1063                 html("</form>");
1064                 free(currenturl);
1065         }
1066         html("</td></tr></table>\n");
1067         if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
1068                 html("<div class='path'>");
1069                 html("path: ");
1070                 cgit_print_path_crumbs(ctx.qry.vpath);
1071                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1072                         html(" (");
1073                         ctx.qry.follow = !ctx.qry.follow;
1074                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1075                                         NULL, NULL);
1076                         ctx.qry.follow = !ctx.qry.follow;
1077                         html(")");
1078                 }
1079                 html("</div>");
1080         }
1081         html("<div class='content'>");
1082 }
1083
1084 void cgit_print_filemode(unsigned short mode)
1085 {
1086         if (S_ISDIR(mode))
1087                 html("d");
1088         else if (S_ISLNK(mode))
1089                 html("l");
1090         else if (S_ISGITLINK(mode))
1091                 html("m");
1092         else
1093                 html("-");
1094         html_fileperm(mode >> 6);
1095         html_fileperm(mode >> 3);
1096         html_fileperm(mode);
1097 }
1098
1099 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1100                                   const char *ref)
1101 {
1102         struct object_id oid;
1103
1104         /*
1105          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1106          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1107          * i.e. each stripped tag can be inverted without ambiguities.
1108          */
1109         if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
1110             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1111             ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
1112              (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
1113              (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
1114                 ref++;
1115
1116         strbuf_addf(filename, "%s-%s", base, ref);
1117 }
1118
1119 void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
1120                                const char *separator)
1121 {
1122         const struct cgit_snapshot_format *f;
1123         struct strbuf filename = STRBUF_INIT;
1124         const char *basename;
1125         size_t prefixlen;
1126
1127         basename = cgit_snapshot_prefix(repo);
1128         if (starts_with(ref, basename))
1129                 strbuf_addstr(&filename, ref);
1130         else
1131                 cgit_compose_snapshot_prefix(&filename, basename, ref);
1132
1133         prefixlen = filename.len;
1134         for (f = cgit_snapshot_formats; f->suffix; f++) {
1135                 if (!(repo->snapshots & cgit_snapshot_format_bit(f)))
1136                         continue;
1137                 strbuf_setlen(&filename, prefixlen);
1138                 strbuf_addstr(&filename, f->suffix);
1139                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1140                                    filename.buf);
1141                 if (cgit_snapshot_get_sig(ref, f)) {
1142                         strbuf_addstr(&filename, ".asc");
1143                         html(" (");
1144                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1145                                            filename.buf);
1146                         html(")");
1147                 } else if (starts_with(f->suffix, ".tar") && cgit_snapshot_get_sig(ref, &cgit_snapshot_formats[0])) {
1148                         strbuf_setlen(&filename, strlen(filename.buf) - strlen(f->suffix));
1149                         strbuf_addstr(&filename, ".tar.asc");
1150                         html(" (");
1151                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1152                                            filename.buf);
1153                         html(")");
1154                 }
1155                 html(separator);
1156         }
1157         strbuf_release(&filename);
1158 }
1159
1160 void cgit_set_title_from_path(const char *path)
1161 {
1162         size_t path_len, path_index, path_last_end;
1163         char *new_title;
1164
1165         if (!path)
1166                 return;
1167
1168         path_len = strlen(path);
1169         new_title = xmalloc(path_len + 3 + strlen(ctx.page.title) + 1);
1170         new_title[0] = '\0';
1171
1172         for (path_index = path_len, path_last_end = path_len; path_index-- > 0;) {
1173                 if (path[path_index] == '/') {
1174                         if (path_index == path_len - 1) {
1175                                 path_last_end = path_index - 1;
1176                                 continue;
1177                         }
1178                         strncat(new_title, &path[path_index + 1], path_last_end - path_index - 1);
1179                         strcat(new_title, "\\");
1180                         path_last_end = path_index;
1181                 }
1182         }
1183         if (path_last_end)
1184                 strncat(new_title, path, path_last_end);
1185
1186         strcat(new_title, " - ");
1187         strcat(new_title, ctx.page.title);
1188         ctx.page.title = new_title;
1189 }