cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "cache.h"
  11 #include "cmd.h"
  12 #include "configfile.h"
  13 #include "html.h"
  14 #include "ui-shared.h"
  15 #include "ui-stats.h"
  16 #include "ui-blob.h"
  17 #include "ui-summary.h"
  18 #include "scan-tree.h"
  19
  20 const char *cgit_version = CGIT_VERSION;
  21
  22 static void add_mimetype(const char *name, const char *value)
  23 {
  24         struct string_list_item *item;
  25
  26         item = string_list_insert(&ctx.cfg.mimetypes, name);
  27         item->util = xstrdup(value);
  28 }
  29
  30 static void process_cached_repolist(const char *path);
  31
  32 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  33 {
  34         const char *path;
  35         struct string_list_item *item;
  36
  37         if (!strcmp(name, "name"))
  38                 repo->name = xstrdup(value);
  39         else if (!strcmp(name, "clone-url"))
  40                 repo->clone_url = xstrdup(value);
  41         else if (!strcmp(name, "desc"))
  42                 repo->desc = xstrdup(value);
  43         else if (!strcmp(name, "owner"))
  44                 repo->owner = xstrdup(value);
  45         else if (!strcmp(name, "homepage"))
  46                 repo->homepage = xstrdup(value);
  47         else if (!strcmp(name, "defbranch"))
  48                 repo->defbranch = xstrdup(value);
  49         else if (!strcmp(name, "extra-head-content"))
  50                 repo->extra_head_content = xstrdup(value);
  51         else if (!strcmp(name, "snapshots"))
  52                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  53         else if (!strcmp(name, "enable-commit-graph"))
  54                 repo->enable_commit_graph = atoi(value);
  55         else if (!strcmp(name, "enable-log-filecount"))
  56                 repo->enable_log_filecount = atoi(value);
  57         else if (!strcmp(name, "enable-log-linecount"))
  58                 repo->enable_log_linecount = atoi(value);
  59         else if (!strcmp(name, "enable-remote-branches"))
  60                 repo->enable_remote_branches = atoi(value);
  61         else if (!strcmp(name, "enable-subject-links"))
  62                 repo->enable_subject_links = atoi(value);
  63         else if (!strcmp(name, "enable-html-serving"))
  64                 repo->enable_html_serving = atoi(value);
  65         else if (!strcmp(name, "branch-sort")) {
  66                 if (!strcmp(value, "age"))
  67                         repo->branch_sort = 1;
  68                 if (!strcmp(value, "name"))
  69                         repo->branch_sort = 0;
  70         } else if (!strcmp(name, "commit-sort")) {
  71                 if (!strcmp(value, "date"))
  72                         repo->commit_sort = 1;
  73                 if (!strcmp(value, "topo"))
  74                         repo->commit_sort = 2;
  75         } else if (!strcmp(name, "max-stats"))
  76                 repo->max_stats = cgit_find_stats_period(value, NULL);
  77         else if (!strcmp(name, "module-link"))
  78                 repo->module_link= xstrdup(value);
  79         else if (skip_prefix(name, "module-link.", &path)) {
  80                 item = string_list_append(&repo->submodules, xstrdup(path));
  81                 item->util = xstrdup(value);
  82         } else if (!strcmp(name, "section"))
  83                 repo->section = xstrdup(value);
  84         else if (!strcmp(name, "snapshot-prefix"))
  85                 repo->snapshot_prefix = xstrdup(value);
  86         else if (!strcmp(name, "readme") && value != NULL) {
  87                 if (repo->readme.items == ctx.cfg.readme.items)
  88                         memset(&repo->readme, 0, sizeof(repo->readme));
  89                 string_list_append(&repo->readme, xstrdup(value));
  90         } else if (!strcmp(name, "logo") && value != NULL)
  91                 repo->logo = xstrdup(value);
  92         else if (!strcmp(name, "logo-link") && value != NULL)
  93                 repo->logo_link = xstrdup(value);
  94         else if (!strcmp(name, "hide"))
  95                 repo->hide = atoi(value);
  96         else if (!strcmp(name, "ignore"))
  97                 repo->ignore = atoi(value);
  98         else if (ctx.cfg.enable_filter_overrides) {
  99                 if (!strcmp(name, "about-filter"))
 100                         repo->about_filter = cgit_new_filter(value, ABOUT);
 101                 else if (!strcmp(name, "commit-filter"))
 102                         repo->commit_filter = cgit_new_filter(value, COMMIT);
 103                 else if (!strcmp(name, "source-filter"))
 104                         repo->source_filter = cgit_new_filter(value, SOURCE);
 105                 else if (!strcmp(name, "email-filter"))
 106                         repo->email_filter = cgit_new_filter(value, EMAIL);
 107                 else if (!strcmp(name, "owner-filter"))
 108                         repo->owner_filter = cgit_new_filter(value, OWNER);
 109         }
 110 }
 111
 112 static void config_cb(const char *name, const char *value)
 113 {
 114         const char *arg;
 115
 116         if (!strcmp(name, "section"))
 117                 ctx.cfg.section = xstrdup(value);
 118         else if (!strcmp(name, "repo.url"))
 119                 ctx.repo = cgit_add_repo(value);
 120         else if (ctx.repo && !strcmp(name, "repo.path"))
 121                 ctx.repo->path = trim_end(value, '/');
 122         else if (ctx.repo && skip_prefix(name, "repo.", &arg))
 123                 repo_config(ctx.repo, arg, value);
 124         else if (!strcmp(name, "readme"))
 125                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 126         else if (!strcmp(name, "root-title"))
 127                 ctx.cfg.root_title = xstrdup(value);
 128         else if (!strcmp(name, "root-desc"))
 129                 ctx.cfg.root_desc = xstrdup(value);
 130         else if (!strcmp(name, "root-readme"))
 131                 ctx.cfg.root_readme = xstrdup(value);
 132         else if (!strcmp(name, "css"))
 133                 ctx.cfg.css = xstrdup(value);
 134         else if (!strcmp(name, "favicon"))
 135                 ctx.cfg.favicon = xstrdup(value);
 136         else if (!strcmp(name, "footer"))
 137                 ctx.cfg.footer = xstrdup(value);
 138         else if (!strcmp(name, "head-include"))
 139                 ctx.cfg.head_include = xstrdup(value);
 140         else if (!strcmp(name, "header"))
 141                 ctx.cfg.header = xstrdup(value);
 142         else if (!strcmp(name, "logo"))
 143                 ctx.cfg.logo = xstrdup(value);
 144         else if (!strcmp(name, "logo-link"))
 145                 ctx.cfg.logo_link = xstrdup(value);
 146         else if (!strcmp(name, "module-link"))
 147                 ctx.cfg.module_link = xstrdup(value);
 148         else if (!strcmp(name, "strict-export"))
 149                 ctx.cfg.strict_export = xstrdup(value);
 150         else if (!strcmp(name, "virtual-root"))
 151                 ctx.cfg.virtual_root = ensure_end(value, '/');
 152         else if (!strcmp(name, "noplainemail"))
 153                 ctx.cfg.noplainemail = atoi(value);
 154         else if (!strcmp(name, "noheader"))
 155                 ctx.cfg.noheader = atoi(value);
 156         else if (!strcmp(name, "snapshots"))
 157                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 158         else if (!strcmp(name, "enable-filter-overrides"))
 159                 ctx.cfg.enable_filter_overrides = atoi(value);
 160         else if (!strcmp(name, "enable-follow-links"))
 161                 ctx.cfg.enable_follow_links = atoi(value);
 162         else if (!strcmp(name, "enable-http-clone"))
 163                 ctx.cfg.enable_http_clone = atoi(value);
 164         else if (!strcmp(name, "enable-index-links"))
 165                 ctx.cfg.enable_index_links = atoi(value);
 166         else if (!strcmp(name, "enable-index-owner"))
 167                 ctx.cfg.enable_index_owner = atoi(value);
 168         else if (!strcmp(name, "enable-blame"))
 169                 ctx.cfg.enable_blame = atoi(value);
 170         else if (!strcmp(name, "enable-commit-graph"))
 171                 ctx.cfg.enable_commit_graph = atoi(value);
 172         else if (!strcmp(name, "enable-log-filecount"))
 173                 ctx.cfg.enable_log_filecount = atoi(value);
 174         else if (!strcmp(name, "enable-log-linecount"))
 175                 ctx.cfg.enable_log_linecount = atoi(value);
 176         else if (!strcmp(name, "enable-remote-branches"))
 177                 ctx.cfg.enable_remote_branches = atoi(value);
 178         else if (!strcmp(name, "enable-subject-links"))
 179                 ctx.cfg.enable_subject_links = atoi(value);
 180         else if (!strcmp(name, "enable-html-serving"))
 181                 ctx.cfg.enable_html_serving = atoi(value);
 182         else if (!strcmp(name, "enable-tree-linenumbers"))
 183                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 184         else if (!strcmp(name, "enable-git-config"))
 185                 ctx.cfg.enable_git_config = atoi(value);
 186         else if (!strcmp(name, "max-stats"))
 187                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 188         else if (!strcmp(name, "cache-size"))
 189                 ctx.cfg.cache_size = atoi(value);
 190         else if (!strcmp(name, "cache-root"))
 191                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 192         else if (!strcmp(name, "cache-root-ttl"))
 193                 ctx.cfg.cache_root_ttl = atoi(value);
 194         else if (!strcmp(name, "cache-repo-ttl"))
 195                 ctx.cfg.cache_repo_ttl = atoi(value);
 196         else if (!strcmp(name, "cache-scanrc-ttl"))
 197                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 198         else if (!strcmp(name, "cache-static-ttl"))
 199                 ctx.cfg.cache_static_ttl = atoi(value);
 200         else if (!strcmp(name, "cache-dynamic-ttl"))
 201                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 202         else if (!strcmp(name, "cache-about-ttl"))
 203                 ctx.cfg.cache_about_ttl = atoi(value);
 204         else if (!strcmp(name, "cache-snapshot-ttl"))
 205                 ctx.cfg.cache_snapshot_ttl = atoi(value);
 206         else if (!strcmp(name, "case-sensitive-sort"))
 207                 ctx.cfg.case_sensitive_sort = atoi(value);
 208         else if (!strcmp(name, "about-filter"))
 209                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 210         else if (!strcmp(name, "commit-filter"))
 211                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 212         else if (!strcmp(name, "email-filter"))
 213                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 214         else if (!strcmp(name, "owner-filter"))
 215                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
 216         else if (!strcmp(name, "auth-filter"))
 217                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 218         else if (!strcmp(name, "embedded"))
 219                 ctx.cfg.embedded = atoi(value);
 220         else if (!strcmp(name, "max-atom-items"))
 221                 ctx.cfg.max_atom_items = atoi(value);
 222         else if (!strcmp(name, "max-message-length"))
 223                 ctx.cfg.max_msg_len = atoi(value);
 224         else if (!strcmp(name, "max-repodesc-length"))
 225                 ctx.cfg.max_repodesc_len = atoi(value);
 226         else if (!strcmp(name, "max-blob-size"))
 227                 ctx.cfg.max_blob_size = atoi(value);
 228         else if (!strcmp(name, "max-repo-count"))
 229                 ctx.cfg.max_repo_count = atoi(value);
 230         else if (!strcmp(name, "max-commit-count"))
 231                 ctx.cfg.max_commit_count = atoi(value);
 232         else if (!strcmp(name, "project-list"))
 233                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 234         else if (!strcmp(name, "scan-path"))
 235                 if (ctx.cfg.cache_size)
 236                         process_cached_repolist(expand_macros(value));
 237                 else if (ctx.cfg.project_list)
 238                         scan_projects(expand_macros(value),
 239                                       ctx.cfg.project_list, repo_config);
 240                 else
 241                         scan_tree(expand_macros(value), repo_config);
 242         else if (!strcmp(name, "scan-hidden-path"))
 243                 ctx.cfg.scan_hidden_path = atoi(value);
 244         else if (!strcmp(name, "section-from-path"))
 245                 ctx.cfg.section_from_path = atoi(value);
 246         else if (!strcmp(name, "repository-sort"))
 247                 ctx.cfg.repository_sort = xstrdup(value);
 248         else if (!strcmp(name, "section-sort"))
 249                 ctx.cfg.section_sort = atoi(value);
 250         else if (!strcmp(name, "source-filter"))
 251                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 252         else if (!strcmp(name, "summary-log"))
 253                 ctx.cfg.summary_log = atoi(value);
 254         else if (!strcmp(name, "summary-branches"))
 255                 ctx.cfg.summary_branches = atoi(value);
 256         else if (!strcmp(name, "summary-tags"))
 257                 ctx.cfg.summary_tags = atoi(value);
 258         else if (!strcmp(name, "side-by-side-diffs"))
 259                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 260         else if (!strcmp(name, "agefile"))
 261                 ctx.cfg.agefile = xstrdup(value);
 262         else if (!strcmp(name, "mimetype-file"))
 263                 ctx.cfg.mimetype_file = xstrdup(value);
 264         else if (!strcmp(name, "renamelimit"))
 265                 ctx.cfg.renamelimit = atoi(value);
 266         else if (!strcmp(name, "remove-suffix"))
 267                 ctx.cfg.remove_suffix = atoi(value);
 268         else if (!strcmp(name, "robots"))
 269                 ctx.cfg.robots = xstrdup(value);
 270         else if (!strcmp(name, "clone-prefix"))
 271                 ctx.cfg.clone_prefix = xstrdup(value);
 272         else if (!strcmp(name, "clone-url"))
 273                 ctx.cfg.clone_url = xstrdup(value);
 274         else if (!strcmp(name, "local-time"))
 275                 ctx.cfg.local_time = atoi(value);
 276         else if (!strcmp(name, "commit-sort")) {
 277                 if (!strcmp(value, "date"))
 278                         ctx.cfg.commit_sort = 1;
 279                 if (!strcmp(value, "topo"))
 280                         ctx.cfg.commit_sort = 2;
 281         } else if (!strcmp(name, "branch-sort")) {
 282                 if (!strcmp(value, "age"))
 283                         ctx.cfg.branch_sort = 1;
 284                 if (!strcmp(value, "name"))
 285                         ctx.cfg.branch_sort = 0;
 286         } else if (skip_prefix(name, "mimetype.", &arg))
 287                 add_mimetype(arg, value);
 288         else if (!strcmp(name, "include"))
 289                 parse_configfile(expand_macros(value), config_cb);
 290 }
 291
 292 static void querystring_cb(const char *name, const char *value)
 293 {
 294         if (!value)
 295                 value = "";
 296
 297         if (!strcmp(name,"r")) {
 298                 ctx.qry.repo = xstrdup(value);
 299                 ctx.repo = cgit_get_repoinfo(value);
 300         } else if (!strcmp(name, "p")) {
 301                 ctx.qry.page = xstrdup(value);
 302         } else if (!strcmp(name, "url")) {
 303                 if (*value == '/')
 304                         value++;
 305                 ctx.qry.url = xstrdup(value);
 306                 cgit_parse_url(value);
 307         } else if (!strcmp(name, "qt")) {
 308                 ctx.qry.grep = xstrdup(value);
 309         } else if (!strcmp(name, "q")) {
 310                 ctx.qry.search = xstrdup(value);
 311         } else if (!strcmp(name, "h")) {
 312                 ctx.qry.head = xstrdup(value);
 313                 ctx.qry.has_symref = 1;
 314         } else if (!strcmp(name, "id")) {
 315                 ctx.qry.sha1 = xstrdup(value);
 316                 ctx.qry.has_sha1 = 1;
 317         } else if (!strcmp(name, "id2")) {
 318                 ctx.qry.sha2 = xstrdup(value);
 319                 ctx.qry.has_sha1 = 1;
 320         } else if (!strcmp(name, "ofs")) {
 321                 ctx.qry.ofs = atoi(value);
 322         } else if (!strcmp(name, "path")) {
 323                 ctx.qry.path = trim_end(value, '/');
 324         } else if (!strcmp(name, "name")) {
 325                 ctx.qry.name = xstrdup(value);
 326         } else if (!strcmp(name, "s")) {
 327                 ctx.qry.sort = xstrdup(value);
 328         } else if (!strcmp(name, "showmsg")) {
 329                 ctx.qry.showmsg = atoi(value);
 330         } else if (!strcmp(name, "period")) {
 331                 ctx.qry.period = xstrdup(value);
 332         } else if (!strcmp(name, "dt")) {
 333                 ctx.qry.difftype = atoi(value);
 334                 ctx.qry.has_difftype = 1;
 335         } else if (!strcmp(name, "ss")) {
 336                 /* No longer generated, but there may be links out there. */
 337                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 338                 ctx.qry.has_difftype = 1;
 339         } else if (!strcmp(name, "all")) {
 340                 ctx.qry.show_all = atoi(value);
 341         } else if (!strcmp(name, "context")) {
 342                 ctx.qry.context = atoi(value);
 343         } else if (!strcmp(name, "ignorews")) {
 344                 ctx.qry.ignorews = atoi(value);
 345         } else if (!strcmp(name, "follow")) {
 346                 ctx.qry.follow = atoi(value);
 347         }
 348 }
 349
 350 static void prepare_context(void)
 351 {
 352         memset(&ctx, 0, sizeof(ctx));
 353         ctx.cfg.agefile = "info/web/last-modified";
 354         ctx.cfg.cache_size = 0;
 355         ctx.cfg.cache_max_create_time = 5;
 356         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
 357         ctx.cfg.cache_about_ttl = 15;
 358         ctx.cfg.cache_snapshot_ttl = 5;
 359         ctx.cfg.cache_repo_ttl = 5;
 360         ctx.cfg.cache_root_ttl = 5;
 361         ctx.cfg.cache_scanrc_ttl = 15;
 362         ctx.cfg.cache_dynamic_ttl = 5;
 363         ctx.cfg.cache_static_ttl = -1;
 364         ctx.cfg.case_sensitive_sort = 1;
 365         ctx.cfg.branch_sort = 0;
 366         ctx.cfg.commit_sort = 0;
 367         ctx.cfg.css = "/cgit.css";
 368         ctx.cfg.logo = "/cgit.png";
 369         ctx.cfg.favicon = "/favicon.ico";
 370         ctx.cfg.local_time = 0;
 371         ctx.cfg.enable_http_clone = 1;
 372         ctx.cfg.enable_index_owner = 1;
 373         ctx.cfg.enable_tree_linenumbers = 1;
 374         ctx.cfg.enable_git_config = 0;
 375         ctx.cfg.max_repo_count = 50;
 376         ctx.cfg.max_commit_count = 50;
 377         ctx.cfg.max_lock_attempts = 5;
 378         ctx.cfg.max_msg_len = 80;
 379         ctx.cfg.max_repodesc_len = 80;
 380         ctx.cfg.max_blob_size = 0;
 381         ctx.cfg.max_stats = 0;
 382         ctx.cfg.project_list = NULL;
 383         ctx.cfg.renamelimit = -1;
 384         ctx.cfg.remove_suffix = 0;
 385         ctx.cfg.robots = "index, nofollow";
 386         ctx.cfg.root_title = "Git repository browser";
 387         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 388         ctx.cfg.scan_hidden_path = 0;
 389         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
 390         ctx.cfg.section = "";
 391         ctx.cfg.repository_sort = "name";
 392         ctx.cfg.section_sort = 1;
 393         ctx.cfg.summary_branches = 10;
 394         ctx.cfg.summary_log = 10;
 395         ctx.cfg.summary_tags = 10;
 396         ctx.cfg.max_atom_items = 10;
 397         ctx.cfg.difftype = DIFF_UNIFIED;
 398         ctx.env.cgit_config = getenv("CGIT_CONFIG");
 399         ctx.env.http_host = getenv("HTTP_HOST");
 400         ctx.env.https = getenv("HTTPS");
 401         ctx.env.no_http = getenv("NO_HTTP");
 402         ctx.env.path_info = getenv("PATH_INFO");
 403         ctx.env.query_string = getenv("QUERY_STRING");
 404         ctx.env.request_method = getenv("REQUEST_METHOD");
 405         ctx.env.script_name = getenv("SCRIPT_NAME");
 406         ctx.env.server_name = getenv("SERVER_NAME");
 407         ctx.env.server_port = getenv("SERVER_PORT");
 408         ctx.env.http_cookie = getenv("HTTP_COOKIE");
 409         ctx.env.http_referer = getenv("HTTP_REFERER");
 410         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
 411         ctx.env.authenticated = 0;
 412         ctx.page.mimetype = "text/html";
 413         ctx.page.charset = PAGE_ENCODING;
 414         ctx.page.filename = NULL;
 415         ctx.page.size = 0;
 416         ctx.page.modified = time(NULL);
 417         ctx.page.expires = ctx.page.modified;
 418         ctx.page.etag = NULL;
 419         string_list_init(&ctx.cfg.mimetypes, 1);
 420         if (ctx.env.script_name)
 421                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
 422         if (ctx.env.query_string)
 423                 ctx.qry.raw = xstrdup(ctx.env.query_string);
 424         if (!ctx.env.cgit_config)
 425                 ctx.env.cgit_config = CGIT_CONFIG;
 426 }
 427
 428 struct refmatch {
 429         char *req_ref;
 430         char *first_ref;
 431         int match;
 432 };
 433
 434 static int find_current_ref(const char *refname, const struct object_id *oid,
 435                             int flags, void *cb_data)
 436 {
 437         struct refmatch *info;
 438
 439         info = (struct refmatch *)cb_data;
 440         if (!strcmp(refname, info->req_ref))
 441                 info->match = 1;
 442         if (!info->first_ref)
 443                 info->first_ref = xstrdup(refname);
 444         return info->match;
 445 }
 446
 447 static void free_refmatch_inner(struct refmatch *info)
 448 {
 449         if (info->first_ref)
 450                 free(info->first_ref);
 451 }
 452
 453 static char *find_default_branch(struct cgit_repo *repo)
 454 {
 455         struct refmatch info;
 456         char *ref;
 457
 458         info.req_ref = repo->defbranch;
 459         info.first_ref = NULL;
 460         info.match = 0;
 461         for_each_branch_ref(find_current_ref, &info);
 462         if (info.match)
 463                 ref = info.req_ref;
 464         else
 465                 ref = info.first_ref;
 466         if (ref)
 467                 ref = xstrdup(ref);
 468         free_refmatch_inner(&info);
 469
 470         return ref;
 471 }
 472
 473 static char *guess_defbranch(void)
 474 {
 475         const char *ref, *refname;
 476         struct object_id oid;
 477
 478         ref = resolve_ref_unsafe("HEAD", 0, &oid, NULL);
 479         if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
 480                 return "master";
 481         return xstrdup(refname);
 482 }
 483
 484 /* The caller must free filename and ref after calling this. */
 485 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 486 {
 487         const char *colon;
 488
 489         *filename = NULL;
 490         *ref = NULL;
 491
 492         if (!readme || !readme[0])
 493                 return;
 494
 495         /* Check if the readme is tracked in the git repo. */
 496         colon = strchr(readme, ':');
 497         if (colon && strlen(colon) > 1) {
 498                 /* If it starts with a colon, we want to use
 499                  * the default branch */
 500                 if (colon == readme && repo->defbranch)
 501                         *ref = xstrdup(repo->defbranch);
 502                 else
 503                         *ref = xstrndup(readme, colon - readme);
 504                 readme = colon + 1;
 505         }
 506
 507         /* Prepend repo path to relative readme path unless tracked. */
 508         if (!(*ref) && readme[0] != '/')
 509                 *filename = fmtalloc("%s/%s", repo->path, readme);
 510         else
 511                 *filename = xstrdup(readme);
 512 }
 513 static void choose_readme(struct cgit_repo *repo)
 514 {
 515         int found;
 516         char *filename, *ref;
 517         struct string_list_item *entry;
 518
 519         if (!repo->readme.nr)
 520                 return;
 521
 522         found = 0;
 523         for_each_string_list_item(entry, &repo->readme) {
 524                 parse_readme(entry->string, &filename, &ref, repo);
 525                 if (!filename) {
 526                         free(filename);
 527                         free(ref);
 528                         continue;
 529                 }
 530                 if (ref) {
 531                         if (cgit_ref_path_exists(filename, ref, 1)) {
 532                                 found = 1;
 533                                 break;
 534                         }
 535                 }
 536                 else if (!access(filename, R_OK)) {
 537                         found = 1;
 538                         break;
 539                 }
 540                 free(filename);
 541                 free(ref);
 542         }
 543         repo->readme.strdup_strings = 1;
 544         string_list_clear(&repo->readme, 0);
 545         repo->readme.strdup_strings = 0;
 546         if (found)
 547                 string_list_append(&repo->readme, filename)->util = ref;
 548 }
 549
 550 static void print_no_repo_clone_urls(const char *url)
 551 {
 552         html("<tr><td><a rel='vcs-git' href='");
 553         html_url_path(url);
 554         html("' title='");
 555         html_attr(ctx.repo->name);
 556         html(" Git repository'>");
 557         html_txt(url);
 558         html("</a></td></tr>\n");
 559 }
 560
 561 static void prepare_repo_env(int *nongit)
 562 {
 563         /* The path to the git repository. */
 564         setenv("GIT_DIR", ctx.repo->path, 1);
 565
 566         /* Do not look in /etc/ for gitconfig and gitattributes. */
 567         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
 568         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
 569         unsetenv("HOME");
 570         unsetenv("XDG_CONFIG_HOME");
 571
 572         /* Setup the git directory and initialize the notes system. Both of these
 573          * load local configuration from the git repository, so we do them both while
 574          * the HOME variables are unset. */
 575         setup_git_directory_gently(nongit);
 576         init_display_notes(NULL);
 577 }
 578 static int prepare_repo_cmd(int nongit)
 579 {
 580         struct object_id oid;
 581         int rc;
 582
 583         if (nongit) {
 584                 const char *name = ctx.repo->name;
 585                 rc = errno;
 586                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 587                                                 "config error");
 588                 ctx.repo = NULL;
 589                 cgit_print_http_headers();
 590                 cgit_print_docstart();
 591                 cgit_print_pageheader();
 592                 cgit_print_error("Failed to open %s: %s", name,
 593                                  rc ? strerror(rc) : "Not a valid git repository");
 594                 cgit_print_docend();
 595                 return 1;
 596         }
 597         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 598
 599         if (!ctx.repo->defbranch)
 600                 ctx.repo->defbranch = guess_defbranch();
 601
 602         if (!ctx.qry.head) {
 603                 ctx.qry.nohead = 1;
 604                 ctx.qry.head = find_default_branch(ctx.repo);
 605         }
 606
 607         if (!ctx.qry.head) {
 608                 cgit_print_http_headers();
 609                 cgit_print_docstart();
 610                 cgit_print_pageheader();
 611                 cgit_print_error("Repository seems to be empty");
 612                 if (!strcmp(ctx.qry.page, "summary")) {
 613                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
 614                         cgit_prepare_repo_env(ctx.repo);
 615                         cgit_add_clone_urls(print_no_repo_clone_urls);
 616                         html("</table>\n");
 617                 }
 618                 cgit_print_docend();
 619                 return 1;
 620         }
 621
 622         if (get_oid(ctx.qry.head, &oid)) {
 623                 char *old_head = ctx.qry.head;
 624                 ctx.qry.head = xstrdup(ctx.repo->defbranch);
 625                 cgit_print_error_page(404, "Not found",
 626                                 "Invalid branch: %s", old_head);
 627                 free(old_head);
 628                 return 1;
 629         }
 630         string_list_sort(&ctx.repo->submodules);
 631         cgit_prepare_repo_env(ctx.repo);
 632         choose_readme(ctx.repo);
 633         return 0;
 634 }
 635
 636 static inline void open_auth_filter(const char *function)
 637 {
 638         cgit_open_filter(ctx.cfg.auth_filter, function,
 639                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
 640                 ctx.env.request_method ? ctx.env.request_method : "",
 641                 ctx.env.query_string ? ctx.env.query_string : "",
 642                 ctx.env.http_referer ? ctx.env.http_referer : "",
 643                 ctx.env.path_info ? ctx.env.path_info : "",
 644                 ctx.env.http_host ? ctx.env.http_host : "",
 645                 ctx.env.https ? ctx.env.https : "",
 646                 ctx.qry.repo ? ctx.qry.repo : "",
 647                 ctx.qry.page ? ctx.qry.page : "",
 648                 ctx.qry.url ? ctx.qry.url : "",
 649                 cgit_loginurl());
 650 }
 651
 652 /* We intentionally keep this rather small, instead of looping and
 653  * feeding it to the filter a couple bytes at a time. This way, the
 654  * filter itself does not need to handle any denial of service or
 655  * buffer bloat issues. If this winds up being too small, people
 656  * will complain on the mailing list, and we'll increase it as needed. */
 657 #define MAX_AUTHENTICATION_POST_BYTES 4096
 658 /* The filter is expected to spit out "Status: " and all headers. */
 659 static inline void authenticate_post(void)
 660 {
 661         char buffer[MAX_AUTHENTICATION_POST_BYTES];
 662         unsigned int len;
 663
 664         open_auth_filter("authenticate-post");
 665         len = ctx.env.content_length;
 666         if (len > MAX_AUTHENTICATION_POST_BYTES)
 667                 len = MAX_AUTHENTICATION_POST_BYTES;
 668         if (read(STDIN_FILENO, buffer, len) < 0)
 669                 die_errno("Could not read POST from stdin");
 670         if (write(STDOUT_FILENO, buffer, len) < 0)
 671                 die_errno("Could not write POST to stdout");
 672         cgit_close_filter(ctx.cfg.auth_filter);
 673         exit(0);
 674 }
 675
 676 static inline void authenticate_cookie(void)
 677 {
 678         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
 679         if (!ctx.cfg.auth_filter) {
 680                 ctx.env.authenticated = 1;
 681                 return;
 682         }
 683
 684         /* If we're having something POST'd to /login, we're authenticating POST,
 685          * instead of the cookie, so call authenticate_post and bail out early.
 686          * This pattern here should match /?p=login with POST. */
 687         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
 688             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
 689                 authenticate_post();
 690                 return;
 691         }
 692
 693         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
 694         open_auth_filter("authenticate-cookie");
 695         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
 696 }
 697
 698 static void process_request(void)
 699 {
 700         struct cgit_cmd *cmd;
 701         int nongit = 0;
 702
 703         /* If we're not yet authenticated, no matter what page we're on,
 704          * display the authentication body from the auth_filter. This should
 705          * never be cached. */
 706         if (!ctx.env.authenticated) {
 707                 ctx.page.title = "Authentication Required";
 708                 cgit_print_http_headers();
 709                 cgit_print_docstart();
 710                 cgit_print_pageheader();
 711                 open_auth_filter("body");
 712                 cgit_close_filter(ctx.cfg.auth_filter);
 713                 cgit_print_docend();
 714                 return;
 715         }
 716
 717         if (ctx.repo)
 718                 prepare_repo_env(&nongit);
 719
 720         cmd = cgit_get_cmd();
 721         if (!cmd) {
 722                 ctx.page.title = "cgit error";
 723                 cgit_print_error_page(404, "Not found", "Invalid request");
 724                 return;
 725         }
 726
 727         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
 728                 ctx.page.title = "cgit error";
 729                 cgit_print_error_page(404, "Not found", "Invalid request");
 730                 return;
 731         }
 732
 733         if (cmd->want_repo && !ctx.repo) {
 734                 cgit_print_error_page(400, "Bad request",
 735                                 "No repository selected");
 736                 return;
 737         }
 738
 739         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
 740          * in-project path limit to be made available at ctx.qry.vpath.
 741          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
 742          */
 743         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 744
 745         if (ctx.repo && prepare_repo_cmd(nongit))
 746                 return;
 747
 748         cmd->fn();
 749 }
 750
 751 static int cmp_repos(const void *a, const void *b)
 752 {
 753         const struct cgit_repo *ra = a, *rb = b;
 754         return strcmp(ra->url, rb->url);
 755 }
 756
 757 static char *build_snapshot_setting(int bitmap)
 758 {
 759         const struct cgit_snapshot_format *f;
 760         struct strbuf result = STRBUF_INIT;
 761
 762         for (f = cgit_snapshot_formats; f->suffix; f++) {
 763                 if (cgit_snapshot_format_bit(f) & bitmap) {
 764                         if (result.len)
 765                                 strbuf_addch(&result, ' ');
 766                         strbuf_addstr(&result, f->suffix);
 767                 }
 768         }
 769         return strbuf_detach(&result, NULL);
 770 }
 771
 772 static char *get_first_line(char *txt)
 773 {
 774         char *t = xstrdup(txt);
 775         char *p = strchr(t, '\n');
 776         if (p)
 777                 *p = '\0';
 778         return t;
 779 }
 780
 781 static void print_repo(FILE *f, struct cgit_repo *repo)
 782 {
 783         struct string_list_item *item;
 784         fprintf(f, "repo.url=%s\n", repo->url);
 785         fprintf(f, "repo.name=%s\n", repo->name);
 786         fprintf(f, "repo.path=%s\n", repo->path);
 787         if (repo->owner)
 788                 fprintf(f, "repo.owner=%s\n", repo->owner);
 789         if (repo->desc) {
 790                 char *tmp = get_first_line(repo->desc);
 791                 fprintf(f, "repo.desc=%s\n", tmp);
 792                 free(tmp);
 793         }
 794         for_each_string_list_item(item, &repo->readme) {
 795                 if (item->util)
 796                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 797                 else
 798                         fprintf(f, "repo.readme=%s\n", item->string);
 799         }
 800         if (repo->defbranch)
 801                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 802         if (repo->extra_head_content)
 803                 fprintf(f, "repo.extra-head-content=%s\n", repo->extra_head_content);
 804         if (repo->module_link)
 805                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 806         if (repo->section)
 807                 fprintf(f, "repo.section=%s\n", repo->section);
 808         if (repo->homepage)
 809                 fprintf(f, "repo.homepage=%s\n", repo->homepage);
 810         if (repo->clone_url)
 811                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 812         fprintf(f, "repo.enable-commit-graph=%d\n",
 813                 repo->enable_commit_graph);
 814         fprintf(f, "repo.enable-log-filecount=%d\n",
 815                 repo->enable_log_filecount);
 816         fprintf(f, "repo.enable-log-linecount=%d\n",
 817                 repo->enable_log_linecount);
 818         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 819                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 820         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 821                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 822         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 823                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 824         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 825                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 826         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
 827                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 828         if (repo->snapshots != ctx.cfg.snapshots) {
 829                 char *tmp = build_snapshot_setting(repo->snapshots);
 830                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 831                 free(tmp);
 832         }
 833         if (repo->max_stats != ctx.cfg.max_stats)
 834                 fprintf(f, "repo.max-stats=%s\n",
 835                         cgit_find_stats_periodname(repo->max_stats));
 836         if (repo->logo)
 837                 fprintf(f, "repo.logo=%s\n", repo->logo);
 838         if (repo->logo_link)
 839                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 840         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 841         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 842         fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
 843         if (repo->branch_sort == 1)
 844                 fprintf(f, "repo.branch-sort=age\n");
 845         if (repo->commit_sort) {
 846                 if (repo->commit_sort == 1)
 847                         fprintf(f, "repo.commit-sort=date\n");
 848                 else if (repo->commit_sort == 2)
 849                         fprintf(f, "repo.commit-sort=topo\n");
 850         }
 851         fprintf(f, "repo.hide=%d\n", repo->hide);
 852         fprintf(f, "repo.ignore=%d\n", repo->ignore);
 853         fprintf(f, "\n");
 854 }
 855
 856 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 857 {
 858         int i;
 859
 860         for (i = start; i < list->count; i++)
 861                 print_repo(f, &list->repos[i]);
 862 }
 863
 864 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 865  * and return 0 on success.
 866  */
 867 static int generate_cached_repolist(const char *path, const char *cached_rc)
 868 {
 869         struct strbuf locked_rc = STRBUF_INIT;
 870         int result = 0;
 871         int idx;
 872         FILE *f;
 873
 874         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 875         f = fopen(locked_rc.buf, "wx");
 876         if (!f) {
 877                 /* Inform about the error unless the lockfile already existed,
 878                  * since that only means we've got concurrent requests.
 879                  */
 880                 result = errno;
 881                 if (result != EEXIST)
 882                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 883                                 locked_rc.buf, strerror(result), result);
 884                 goto out;
 885         }
 886         idx = cgit_repolist.count;
 887         if (ctx.cfg.project_list)
 888                 scan_projects(path, ctx.cfg.project_list, repo_config);
 889         else
 890                 scan_tree(path, repo_config);
 891         print_repolist(f, &cgit_repolist, idx);
 892         if (rename(locked_rc.buf, cached_rc))
 893                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 894                         locked_rc.buf, cached_rc, strerror(errno), errno);
 895         fclose(f);
 896 out:
 897         strbuf_release(&locked_rc);
 898         return result;
 899 }
 900
 901 static void process_cached_repolist(const char *path)
 902 {
 903         struct stat st;
 904         struct strbuf cached_rc = STRBUF_INIT;
 905         time_t age;
 906         unsigned long hash;
 907
 908         hash = hash_str(path);
 909         if (ctx.cfg.project_list)
 910                 hash += hash_str(ctx.cfg.project_list);
 911         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 912
 913         if (stat(cached_rc.buf, &st)) {
 914                 /* Nothing is cached, we need to scan without forking. And
 915                  * if we fail to generate a cached repolist, we need to
 916                  * invoke scan_tree manually.
 917                  */
 918                 if (generate_cached_repolist(path, cached_rc.buf)) {
 919                         if (ctx.cfg.project_list)
 920                                 scan_projects(path, ctx.cfg.project_list,
 921                                               repo_config);
 922                         else
 923                                 scan_tree(path, repo_config);
 924                 }
 925                 goto out;
 926         }
 927
 928         parse_configfile(cached_rc.buf, config_cb);
 929
 930         /* If the cached configfile hasn't expired, lets exit now */
 931         age = time(NULL) - st.st_mtime;
 932         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 933                 goto out;
 934
 935         /* The cached repolist has been parsed, but it was old. So lets
 936          * rescan the specified path and generate a new cached repolist
 937          * in a child-process to avoid latency for the current request.
 938          */
 939         if (fork())
 940                 goto out;
 941
 942         exit(generate_cached_repolist(path, cached_rc.buf));
 943 out:
 944         strbuf_release(&cached_rc);
 945 }
 946
 947 static void cgit_parse_args(int argc, const char **argv)
 948 {
 949         int i;
 950         const char *arg;
 951         int scan = 0;
 952
 953         for (i = 1; i < argc; i++) {
 954                 if (!strcmp(argv[i], "--version")) {
 955                         printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
 956 #ifdef NO_LUA
 957                         printf("[-] ");
 958 #else
 959                         printf("[+] ");
 960 #endif
 961                         printf("Lua scripting\n");
 962 #ifndef HAVE_LINUX_SENDFILE
 963                         printf("[-] ");
 964 #else
 965                         printf("[+] ");
 966 #endif
 967                         printf("Linux sendfile() usage\n");
 968
 969                         exit(0);
 970                 }
 971                 if (skip_prefix(argv[i], "--cache=", &arg)) {
 972                         ctx.cfg.cache_root = xstrdup(arg);
 973                 } else if (!strcmp(argv[i], "--nohttp")) {
 974                         ctx.env.no_http = "1";
 975                 } else if (skip_prefix(argv[i], "--query=", &arg)) {
 976                         ctx.qry.raw = xstrdup(arg);
 977                 } else if (skip_prefix(argv[i], "--repo=", &arg)) {
 978                         ctx.qry.repo = xstrdup(arg);
 979                 } else if (skip_prefix(argv[i], "--page=", &arg)) {
 980                         ctx.qry.page = xstrdup(arg);
 981                 } else if (skip_prefix(argv[i], "--head=", &arg)) {
 982                         ctx.qry.head = xstrdup(arg);
 983                         ctx.qry.has_symref = 1;
 984                 } else if (skip_prefix(argv[i], "--sha1=", &arg)) {
 985                         ctx.qry.sha1 = xstrdup(arg);
 986                         ctx.qry.has_sha1 = 1;
 987                 } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
 988                         ctx.qry.ofs = atoi(arg);
 989                 } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
 990                            skip_prefix(argv[i], "--scan-path=", &arg)) {
 991                         /*
 992                          * HACK: The global snapshot bit mask defines the set
 993                          * of allowed snapshot formats, but the config file
 994                          * hasn't been parsed yet so the mask is currently 0.
 995                          * By setting all bits high before scanning we make
 996                          * sure that any in-repo cgitrc snapshot setting is
 997                          * respected by scan_tree().
 998                          *
 999                          * NOTE: We assume that there aren't more than 8
1000                          * different snapshot formats supported by cgit...
1001                          */
1002                         ctx.cfg.snapshots = 0xFF;
1003                         scan++;
1004                         scan_tree(arg, repo_config);
1005                 }
1006         }
1007         if (scan) {
1008                 qsort(cgit_repolist.repos, cgit_repolist.count,
1009                         sizeof(struct cgit_repo), cmp_repos);
1010                 print_repolist(stdout, &cgit_repolist, 0);
1011                 exit(0);
1012         }
1013 }
1014
1015 static int calc_ttl(void)
1016 {
1017         if (!ctx.repo)
1018                 return ctx.cfg.cache_root_ttl;
1019
1020         if (!ctx.qry.page)
1021                 return ctx.cfg.cache_repo_ttl;
1022
1023         if (!strcmp(ctx.qry.page, "about"))
1024                 return ctx.cfg.cache_about_ttl;
1025
1026         if (!strcmp(ctx.qry.page, "snapshot"))
1027                 return ctx.cfg.cache_snapshot_ttl;
1028
1029         if (ctx.qry.has_sha1)
1030                 return ctx.cfg.cache_static_ttl;
1031
1032         if (ctx.qry.has_symref)
1033                 return ctx.cfg.cache_dynamic_ttl;
1034
1035         return ctx.cfg.cache_repo_ttl;
1036 }
1037
1038 int cmd_main(int argc, const char **argv)
1039 {
1040         const char *path;
1041         int err, ttl;
1042
1043         cgit_init_filters();
1044         atexit(cgit_cleanup_filters);
1045
1046         prepare_context();
1047         cgit_repolist.length = 0;
1048         cgit_repolist.count = 0;
1049         cgit_repolist.repos = NULL;
1050
1051         cgit_parse_args(argc, argv);
1052         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1053         ctx.repo = NULL;
1054         http_parse_querystring(ctx.qry.raw, querystring_cb);
1055
1056         /* If virtual-root isn't specified in cgitrc, lets pretend
1057          * that virtual-root equals SCRIPT_NAME, minus any possibly
1058          * trailing slashes.
1059          */
1060         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1061                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1062
1063         /* If no url parameter is specified on the querystring, lets
1064          * use PATH_INFO as url. This allows cgit to work with virtual
1065          * urls without the need for rewriterules in the webserver (as
1066          * long as PATH_INFO is included in the cache lookup key).
1067          */
1068         path = ctx.env.path_info;
1069         if (!ctx.qry.url && path) {
1070                 if (path[0] == '/')
1071                         path++;
1072                 ctx.qry.url = xstrdup(path);
1073                 if (ctx.qry.raw) {
1074                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1075                         free(ctx.qry.raw);
1076                         ctx.qry.raw = newqry;
1077                 } else
1078                         ctx.qry.raw = xstrdup(ctx.qry.url);
1079                 cgit_parse_url(ctx.qry.url);
1080         }
1081
1082         /* Before we go any further, we set ctx.env.authenticated by checking to see
1083          * if the supplied cookie is valid. All cookies are valid if there is no
1084          * auth_filter. If there is an auth_filter, the filter decides. */
1085         authenticate_cookie();
1086
1087         ttl = calc_ttl();
1088         if (ttl < 0)
1089                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1090         else
1091                 ctx.page.expires += ttl * 60;
1092         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1093                 ctx.cfg.cache_size = 0;
1094         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1095                             ctx.qry.raw, ttl, process_request);
1096         cgit_cleanup_filters();
1097         if (err)
1098                 cgit_print_error("Error processing page: %s (%d)",
1099                                  strerror(err), err);
1100         return err;
1101 }