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, xstrdup(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, "snapshots"))
  50                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  51         else if (!strcmp(name, "enable-commit-graph"))
  52                 repo->enable_commit_graph = atoi(value);
  53         else if (!strcmp(name, "enable-log-filecount"))
  54                 repo->enable_log_filecount = atoi(value);
  55         else if (!strcmp(name, "enable-log-linecount"))
  56                 repo->enable_log_linecount = atoi(value);
  57         else if (!strcmp(name, "enable-remote-branches"))
  58                 repo->enable_remote_branches = atoi(value);
  59         else if (!strcmp(name, "enable-subject-links"))
  60                 repo->enable_subject_links = atoi(value);
  61         else if (!strcmp(name, "enable-html-serving"))
  62                 repo->enable_html_serving = atoi(value);
  63         else if (!strcmp(name, "branch-sort")) {
  64                 if (!strcmp(value, "age"))
  65                         repo->branch_sort = 1;
  66                 if (!strcmp(value, "name"))
  67                         repo->branch_sort = 0;
  68         } else if (!strcmp(name, "commit-sort")) {
  69                 if (!strcmp(value, "date"))
  70                         repo->commit_sort = 1;
  71                 if (!strcmp(value, "topo"))
  72                         repo->commit_sort = 2;
  73         } else if (!strcmp(name, "max-stats"))
  74                 repo->max_stats = cgit_find_stats_period(value, NULL);
  75         else if (!strcmp(name, "module-link"))
  76                 repo->module_link= xstrdup(value);
  77         else if (skip_prefix(name, "module-link.", &path)) {
  78                 item = string_list_append(&repo->submodules, xstrdup(path));
  79                 item->util = xstrdup(value);
  80         } else if (!strcmp(name, "section"))
  81                 repo->section = xstrdup(value);
  82         else if (!strcmp(name, "readme") && value != NULL) {
  83                 if (repo->readme.items == ctx.cfg.readme.items)
  84                         memset(&repo->readme, 0, sizeof(repo->readme));
  85                 string_list_append(&repo->readme, xstrdup(value));
  86         } else if (!strcmp(name, "logo") && value != NULL)
  87                 repo->logo = xstrdup(value);
  88         else if (!strcmp(name, "logo-link") && value != NULL)
  89                 repo->logo_link = xstrdup(value);
  90         else if (!strcmp(name, "hide"))
  91                 repo->hide = atoi(value);
  92         else if (!strcmp(name, "ignore"))
  93                 repo->ignore = atoi(value);
  94         else if (ctx.cfg.enable_filter_overrides) {
  95                 if (!strcmp(name, "about-filter"))
  96                         repo->about_filter = cgit_new_filter(value, ABOUT);
  97                 else if (!strcmp(name, "commit-filter"))
  98                         repo->commit_filter = cgit_new_filter(value, COMMIT);
  99                 else if (!strcmp(name, "source-filter"))
 100                         repo->source_filter = cgit_new_filter(value, SOURCE);
 101                 else if (!strcmp(name, "email-filter"))
 102                         repo->email_filter = cgit_new_filter(value, EMAIL);
 103                 else if (!strcmp(name, "owner-filter"))
 104                         repo->owner_filter = cgit_new_filter(value, OWNER);
 105         }
 106 }
 107
 108 static void config_cb(const char *name, const char *value)
 109 {
 110         const char *arg;
 111
 112         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 113                 ctx.cfg.section = xstrdup(value);
 114         else if (!strcmp(name, "repo.url"))
 115                 ctx.repo = cgit_add_repo(value);
 116         else if (ctx.repo && !strcmp(name, "repo.path"))
 117                 ctx.repo->path = trim_end(value, '/');
 118         else if (ctx.repo && skip_prefix(name, "repo.", &arg))
 119                 repo_config(ctx.repo, arg, value);
 120         else if (!strcmp(name, "readme"))
 121                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 122         else if (!strcmp(name, "root-title"))
 123                 ctx.cfg.root_title = xstrdup(value);
 124         else if (!strcmp(name, "root-desc"))
 125                 ctx.cfg.root_desc = xstrdup(value);
 126         else if (!strcmp(name, "root-readme"))
 127                 ctx.cfg.root_readme = xstrdup(value);
 128         else if (!strcmp(name, "css"))
 129                 ctx.cfg.css = xstrdup(value);
 130         else if (!strcmp(name, "favicon"))
 131                 ctx.cfg.favicon = xstrdup(value);
 132         else if (!strcmp(name, "footer"))
 133                 ctx.cfg.footer = xstrdup(value);
 134         else if (!strcmp(name, "head-include"))
 135                 ctx.cfg.head_include = xstrdup(value);
 136         else if (!strcmp(name, "header"))
 137                 ctx.cfg.header = xstrdup(value);
 138         else if (!strcmp(name, "logo"))
 139                 ctx.cfg.logo = xstrdup(value);
 140         else if (!strcmp(name, "index-header"))
 141                 ctx.cfg.index_header = xstrdup(value);
 142         else if (!strcmp(name, "index-info"))
 143                 ctx.cfg.index_info = 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, "nocache"))
 153                 ctx.cfg.nocache = atoi(value);
 154         else if (!strcmp(name, "noplainemail"))
 155                 ctx.cfg.noplainemail = atoi(value);
 156         else if (!strcmp(name, "noheader"))
 157                 ctx.cfg.noheader = atoi(value);
 158         else if (!strcmp(name, "snapshots"))
 159                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 160         else if (!strcmp(name, "enable-filter-overrides"))
 161                 ctx.cfg.enable_filter_overrides = atoi(value);
 162         else if (!strcmp(name, "enable-follow-links"))
 163                 ctx.cfg.enable_follow_links = atoi(value);
 164         else if (!strcmp(name, "enable-http-clone"))
 165                 ctx.cfg.enable_http_clone = atoi(value);
 166         else if (!strcmp(name, "enable-index-links"))
 167                 ctx.cfg.enable_index_links = atoi(value);
 168         else if (!strcmp(name, "enable-index-owner"))
 169                 ctx.cfg.enable_index_owner = atoi(value);
 170         else if (!strcmp(name, "enable-blame"))
 171                 ctx.cfg.enable_blame = atoi(value);
 172         else if (!strcmp(name, "enable-commit-graph"))
 173                 ctx.cfg.enable_commit_graph = atoi(value);
 174         else if (!strcmp(name, "enable-log-filecount"))
 175                 ctx.cfg.enable_log_filecount = atoi(value);
 176         else if (!strcmp(name, "enable-log-linecount"))
 177                 ctx.cfg.enable_log_linecount = atoi(value);
 178         else if (!strcmp(name, "enable-remote-branches"))
 179                 ctx.cfg.enable_remote_branches = atoi(value);
 180         else if (!strcmp(name, "enable-subject-links"))
 181                 ctx.cfg.enable_subject_links = atoi(value);
 182         else if (!strcmp(name, "enable-html-serving"))
 183                 ctx.cfg.enable_html_serving = atoi(value);
 184         else if (!strcmp(name, "enable-tree-linenumbers"))
 185                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 186         else if (!strcmp(name, "enable-git-config"))
 187                 ctx.cfg.enable_git_config = atoi(value);
 188         else if (!strcmp(name, "max-stats"))
 189                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 190         else if (!strcmp(name, "cache-size"))
 191                 ctx.cfg.cache_size = atoi(value);
 192         else if (!strcmp(name, "cache-root"))
 193                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 194         else if (!strcmp(name, "cache-root-ttl"))
 195                 ctx.cfg.cache_root_ttl = atoi(value);
 196         else if (!strcmp(name, "cache-repo-ttl"))
 197                 ctx.cfg.cache_repo_ttl = atoi(value);
 198         else if (!strcmp(name, "cache-scanrc-ttl"))
 199                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 200         else if (!strcmp(name, "cache-static-ttl"))
 201                 ctx.cfg.cache_static_ttl = atoi(value);
 202         else if (!strcmp(name, "cache-dynamic-ttl"))
 203                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 204         else if (!strcmp(name, "cache-about-ttl"))
 205                 ctx.cfg.cache_about_ttl = atoi(value);
 206         else if (!strcmp(name, "cache-snapshot-ttl"))
 207                 ctx.cfg.cache_snapshot_ttl = atoi(value);
 208         else if (!strcmp(name, "case-sensitive-sort"))
 209                 ctx.cfg.case_sensitive_sort = atoi(value);
 210         else if (!strcmp(name, "about-filter"))
 211                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 212         else if (!strcmp(name, "commit-filter"))
 213                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 214         else if (!strcmp(name, "email-filter"))
 215                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 216         else if (!strcmp(name, "owner-filter"))
 217                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
 218         else if (!strcmp(name, "auth-filter"))
 219                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 220         else if (!strcmp(name, "embedded"))
 221                 ctx.cfg.embedded = atoi(value);
 222         else if (!strcmp(name, "max-atom-items"))
 223                 ctx.cfg.max_atom_items = atoi(value);
 224         else if (!strcmp(name, "max-message-length"))
 225                 ctx.cfg.max_msg_len = atoi(value);
 226         else if (!strcmp(name, "max-repodesc-length"))
 227                 ctx.cfg.max_repodesc_len = atoi(value);
 228         else if (!strcmp(name, "max-blob-size"))
 229                 ctx.cfg.max_blob_size = atoi(value);
 230         else if (!strcmp(name, "max-repo-count"))
 231                 ctx.cfg.max_repo_count = atoi(value);
 232         else if (!strcmp(name, "max-commit-count"))
 233                 ctx.cfg.max_commit_count = atoi(value);
 234         else if (!strcmp(name, "project-list"))
 235                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 236         else if (!strcmp(name, "scan-path"))
 237                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 238                         process_cached_repolist(expand_macros(value));
 239                 else if (ctx.cfg.project_list)
 240                         scan_projects(expand_macros(value),
 241                                       ctx.cfg.project_list, repo_config);
 242                 else
 243                         scan_tree(expand_macros(value), repo_config);
 244         else if (!strcmp(name, "scan-hidden-path"))
 245                 ctx.cfg.scan_hidden_path = atoi(value);
 246         else if (!strcmp(name, "section-from-path"))
 247                 ctx.cfg.section_from_path = atoi(value);
 248         else if (!strcmp(name, "repository-sort"))
 249                 ctx.cfg.repository_sort = xstrdup(value);
 250         else if (!strcmp(name, "section-sort"))
 251                 ctx.cfg.section_sort = atoi(value);
 252         else if (!strcmp(name, "source-filter"))
 253                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 254         else if (!strcmp(name, "summary-log"))
 255                 ctx.cfg.summary_log = atoi(value);
 256         else if (!strcmp(name, "summary-branches"))
 257                 ctx.cfg.summary_branches = atoi(value);
 258         else if (!strcmp(name, "summary-tags"))
 259                 ctx.cfg.summary_tags = atoi(value);
 260         else if (!strcmp(name, "side-by-side-diffs"))
 261                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 262         else if (!strcmp(name, "agefile"))
 263                 ctx.cfg.agefile = xstrdup(value);
 264         else if (!strcmp(name, "mimetype-file"))
 265                 ctx.cfg.mimetype_file = xstrdup(value);
 266         else if (!strcmp(name, "renamelimit"))
 267                 ctx.cfg.renamelimit = atoi(value);
 268         else if (!strcmp(name, "remove-suffix"))
 269                 ctx.cfg.remove_suffix = atoi(value);
 270         else if (!strcmp(name, "robots"))
 271                 ctx.cfg.robots = xstrdup(value);
 272         else if (!strcmp(name, "clone-prefix"))
 273                 ctx.cfg.clone_prefix = xstrdup(value);
 274         else if (!strcmp(name, "clone-url"))
 275                 ctx.cfg.clone_url = xstrdup(value);
 276         else if (!strcmp(name, "local-time"))
 277                 ctx.cfg.local_time = atoi(value);
 278         else if (!strcmp(name, "commit-sort")) {
 279                 if (!strcmp(value, "date"))
 280                         ctx.cfg.commit_sort = 1;
 281                 if (!strcmp(value, "topo"))
 282                         ctx.cfg.commit_sort = 2;
 283         } else if (!strcmp(name, "branch-sort")) {
 284                 if (!strcmp(value, "age"))
 285                         ctx.cfg.branch_sort = 1;
 286                 if (!strcmp(value, "name"))
 287                         ctx.cfg.branch_sort = 0;
 288         } else if (skip_prefix(name, "mimetype.", &arg))
 289                 add_mimetype(arg, value);
 290         else if (!strcmp(name, "include"))
 291                 parse_configfile(expand_macros(value), config_cb);
 292 }
 293
 294 static void querystring_cb(const char *name, const char *value)
 295 {
 296         if (!value)
 297                 value = "";
 298
 299         if (!strcmp(name,"r")) {
 300                 ctx.qry.repo = xstrdup(value);
 301                 ctx.repo = cgit_get_repoinfo(value);
 302         } else if (!strcmp(name, "p")) {
 303                 ctx.qry.page = xstrdup(value);
 304         } else if (!strcmp(name, "url")) {
 305                 if (*value == '/')
 306                         value++;
 307                 ctx.qry.url = xstrdup(value);
 308                 cgit_parse_url(value);
 309         } else if (!strcmp(name, "qt")) {
 310                 ctx.qry.grep = xstrdup(value);
 311         } else if (!strcmp(name, "q")) {
 312                 ctx.qry.search = xstrdup(value);
 313         } else if (!strcmp(name, "h")) {
 314                 ctx.qry.head = xstrdup(value);
 315                 ctx.qry.has_symref = 1;
 316         } else if (!strcmp(name, "id")) {
 317                 ctx.qry.sha1 = xstrdup(value);
 318                 ctx.qry.has_sha1 = 1;
 319         } else if (!strcmp(name, "id2")) {
 320                 ctx.qry.sha2 = xstrdup(value);
 321                 ctx.qry.has_sha1 = 1;
 322         } else if (!strcmp(name, "ofs")) {
 323                 ctx.qry.ofs = atoi(value);
 324         } else if (!strcmp(name, "path")) {
 325                 ctx.qry.path = trim_end(value, '/');
 326         } else if (!strcmp(name, "name")) {
 327                 ctx.qry.name = xstrdup(value);
 328         } else if (!strcmp(name, "s")) {
 329                 ctx.qry.sort = xstrdup(value);
 330         } else if (!strcmp(name, "showmsg")) {
 331                 ctx.qry.showmsg = atoi(value);
 332         } else if (!strcmp(name, "period")) {
 333                 ctx.qry.period = xstrdup(value);
 334         } else if (!strcmp(name, "dt")) {
 335                 ctx.qry.difftype = atoi(value);
 336                 ctx.qry.has_difftype = 1;
 337         } else if (!strcmp(name, "ss")) {
 338                 /* No longer generated, but there may be links out there. */
 339                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 340                 ctx.qry.has_difftype = 1;
 341         } else if (!strcmp(name, "all")) {
 342                 ctx.qry.show_all = atoi(value);
 343         } else if (!strcmp(name, "context")) {
 344                 ctx.qry.context = atoi(value);
 345         } else if (!strcmp(name, "ignorews")) {
 346                 ctx.qry.ignorews = atoi(value);
 347         } else if (!strcmp(name, "follow")) {
 348                 ctx.qry.follow = atoi(value);
 349         }
 350 }
 351
 352 static void prepare_context(void)
 353 {
 354         memset(&ctx, 0, sizeof(ctx));
 355         ctx.cfg.agefile = "info/web/last-modified";
 356         ctx.cfg.nocache = 0;
 357         ctx.cfg.cache_size = 0;
 358         ctx.cfg.cache_max_create_time = 5;
 359         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
 360         ctx.cfg.cache_about_ttl = 15;
 361         ctx.cfg.cache_snapshot_ttl = 5;
 362         ctx.cfg.cache_repo_ttl = 5;
 363         ctx.cfg.cache_root_ttl = 5;
 364         ctx.cfg.cache_scanrc_ttl = 15;
 365         ctx.cfg.cache_dynamic_ttl = 5;
 366         ctx.cfg.cache_static_ttl = -1;
 367         ctx.cfg.case_sensitive_sort = 1;
 368         ctx.cfg.branch_sort = 0;
 369         ctx.cfg.commit_sort = 0;
 370         ctx.cfg.css = "/cgit.css";
 371         ctx.cfg.logo = "/cgit.png";
 372         ctx.cfg.favicon = "/favicon.ico";
 373         ctx.cfg.local_time = 0;
 374         ctx.cfg.enable_http_clone = 1;
 375         ctx.cfg.enable_index_owner = 1;
 376         ctx.cfg.enable_tree_linenumbers = 1;
 377         ctx.cfg.enable_git_config = 0;
 378         ctx.cfg.max_repo_count = 50;
 379         ctx.cfg.max_commit_count = 50;
 380         ctx.cfg.max_lock_attempts = 5;
 381         ctx.cfg.max_msg_len = 80;
 382         ctx.cfg.max_repodesc_len = 80;
 383         ctx.cfg.max_blob_size = 0;
 384         ctx.cfg.max_stats = 0;
 385         ctx.cfg.project_list = NULL;
 386         ctx.cfg.renamelimit = -1;
 387         ctx.cfg.remove_suffix = 0;
 388         ctx.cfg.robots = "index, nofollow";
 389         ctx.cfg.root_title = "Git repository browser";
 390         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 391         ctx.cfg.scan_hidden_path = 0;
 392         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
 393         ctx.cfg.section = "";
 394         ctx.cfg.repository_sort = "name";
 395         ctx.cfg.section_sort = 1;
 396         ctx.cfg.summary_branches = 10;
 397         ctx.cfg.summary_log = 10;
 398         ctx.cfg.summary_tags = 10;
 399         ctx.cfg.max_atom_items = 10;
 400         ctx.cfg.difftype = DIFF_UNIFIED;
 401         ctx.env.cgit_config = getenv("CGIT_CONFIG");
 402         ctx.env.http_host = getenv("HTTP_HOST");
 403         ctx.env.https = getenv("HTTPS");
 404         ctx.env.no_http = getenv("NO_HTTP");
 405         ctx.env.path_info = getenv("PATH_INFO");
 406         ctx.env.query_string = getenv("QUERY_STRING");
 407         ctx.env.request_method = getenv("REQUEST_METHOD");
 408         ctx.env.script_name = getenv("SCRIPT_NAME");
 409         ctx.env.server_name = getenv("SERVER_NAME");
 410         ctx.env.server_port = getenv("SERVER_PORT");
 411         ctx.env.http_cookie = getenv("HTTP_COOKIE");
 412         ctx.env.http_referer = getenv("HTTP_REFERER");
 413         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
 414         ctx.env.authenticated = 0;
 415         ctx.page.mimetype = "text/html";
 416         ctx.page.charset = PAGE_ENCODING;
 417         ctx.page.filename = NULL;
 418         ctx.page.size = 0;
 419         ctx.page.modified = time(NULL);
 420         ctx.page.expires = ctx.page.modified;
 421         ctx.page.etag = NULL;
 422         memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
 423         if (ctx.env.script_name)
 424                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
 425         if (ctx.env.query_string)
 426                 ctx.qry.raw = xstrdup(ctx.env.query_string);
 427         if (!ctx.env.cgit_config)
 428                 ctx.env.cgit_config = CGIT_CONFIG;
 429 }
 430
 431 struct refmatch {
 432         char *req_ref;
 433         char *first_ref;
 434         int match;
 435 };
 436
 437 static int find_current_ref(const char *refname, const struct object_id *oid,
 438                             int flags, void *cb_data)
 439 {
 440         struct refmatch *info;
 441
 442         info = (struct refmatch *)cb_data;
 443         if (!strcmp(refname, info->req_ref))
 444                 info->match = 1;
 445         if (!info->first_ref)
 446                 info->first_ref = xstrdup(refname);
 447         return info->match;
 448 }
 449
 450 static void free_refmatch_inner(struct refmatch *info)
 451 {
 452         if (info->first_ref)
 453                 free(info->first_ref);
 454 }
 455
 456 static char *find_default_branch(struct cgit_repo *repo)
 457 {
 458         struct refmatch info;
 459         char *ref;
 460
 461         info.req_ref = repo->defbranch;
 462         info.first_ref = NULL;
 463         info.match = 0;
 464         for_each_branch_ref(find_current_ref, &info);
 465         if (info.match)
 466                 ref = info.req_ref;
 467         else
 468                 ref = info.first_ref;
 469         if (ref)
 470                 ref = xstrdup(ref);
 471         free_refmatch_inner(&info);
 472
 473         return ref;
 474 }
 475
 476 static char *guess_defbranch(void)
 477 {
 478         const char *ref, *refname;
 479         struct object_id oid;
 480
 481         ref = resolve_ref_unsafe("HEAD", 0, &oid, NULL);
 482         if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
 483                 return "master";
 484         return xstrdup(refname);
 485 }
 486
 487 /* The caller must free filename and ref after calling this. */
 488 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 489 {
 490         const char *colon;
 491
 492         *filename = NULL;
 493         *ref = NULL;
 494
 495         if (!readme || !readme[0])
 496                 return;
 497
 498         /* Check if the readme is tracked in the git repo. */
 499         colon = strchr(readme, ':');
 500         if (colon && strlen(colon) > 1) {
 501                 /* If it starts with a colon, we want to use
 502                  * the default branch */
 503                 if (colon == readme && repo->defbranch)
 504                         *ref = xstrdup(repo->defbranch);
 505                 else
 506                         *ref = xstrndup(readme, colon - readme);
 507                 readme = colon + 1;
 508         }
 509
 510         /* Prepend repo path to relative readme path unless tracked. */
 511         if (!(*ref) && readme[0] != '/')
 512                 *filename = fmtalloc("%s/%s", repo->path, readme);
 513         else
 514                 *filename = xstrdup(readme);
 515 }
 516 static void choose_readme(struct cgit_repo *repo)
 517 {
 518         int found;
 519         char *filename, *ref;
 520         struct string_list_item *entry;
 521
 522         if (!repo->readme.nr)
 523                 return;
 524
 525         found = 0;
 526         for_each_string_list_item(entry, &repo->readme) {
 527                 parse_readme(entry->string, &filename, &ref, repo);
 528                 if (!filename) {
 529                         free(filename);
 530                         free(ref);
 531                         continue;
 532                 }
 533                 if (ref) {
 534                         if (cgit_ref_path_exists(filename, ref, 1)) {
 535                                 found = 1;
 536                                 break;
 537                         }
 538                 }
 539                 else if (!access(filename, R_OK)) {
 540                         found = 1;
 541                         break;
 542                 }
 543                 free(filename);
 544                 free(ref);
 545         }
 546         repo->readme.strdup_strings = 1;
 547         string_list_clear(&repo->readme, 0);
 548         repo->readme.strdup_strings = 0;
 549         if (found)
 550                 string_list_append(&repo->readme, filename)->util = ref;
 551 }
 552
 553 static void print_no_repo_clone_urls(const char *url)
 554 {
 555         html("<tr><td><a rel='vcs-git' href='");
 556         html_url_path(url);
 557         html("' title='");
 558         html_attr(ctx.repo->name);
 559         html(" Git repository'>");
 560         html_txt(url);
 561         html("</a></td></tr>\n");
 562 }
 563
 564 static void prepare_repo_env(int *nongit)
 565 {
 566         /* The path to the git repository. */
 567         setenv("GIT_DIR", ctx.repo->path, 1);
 568
 569         /* Do not look in /etc/ for gitconfig and gitattributes. */
 570         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
 571         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
 572         unsetenv("HOME");
 573         unsetenv("XDG_CONFIG_HOME");
 574
 575         /* Setup the git directory and initialize the notes system. Both of these
 576          * load local configuration from the git repository, so we do them both while
 577          * the HOME variables are unset. */
 578         setup_git_directory_gently(nongit);
 579         init_display_notes(NULL);
 580 }
 581 static int prepare_repo_cmd(int nongit)
 582 {
 583         struct object_id oid;
 584         int rc;
 585
 586         if (nongit) {
 587                 const char *name = ctx.repo->name;
 588                 rc = errno;
 589                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 590                                                 "config error");
 591                 ctx.repo = NULL;
 592                 cgit_print_http_headers();
 593                 cgit_print_docstart();
 594                 cgit_print_pageheader();
 595                 cgit_print_error("Failed to open %s: %s", name,
 596                                  rc ? strerror(rc) : "Not a valid git repository");
 597                 cgit_print_docend();
 598                 return 1;
 599         }
 600         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 601
 602         if (!ctx.repo->defbranch)
 603                 ctx.repo->defbranch = guess_defbranch();
 604
 605         if (!ctx.qry.head) {
 606                 ctx.qry.nohead = 1;
 607                 ctx.qry.head = find_default_branch(ctx.repo);
 608         }
 609
 610         if (!ctx.qry.head) {
 611                 cgit_print_http_headers();
 612                 cgit_print_docstart();
 613                 cgit_print_pageheader();
 614                 cgit_print_error("Repository seems to be empty");
 615                 if (!strcmp(ctx.qry.page, "summary")) {
 616                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
 617                         cgit_prepare_repo_env(ctx.repo);
 618                         cgit_add_clone_urls(print_no_repo_clone_urls);
 619                         html("</table>\n");
 620                 }
 621                 cgit_print_docend();
 622                 return 1;
 623         }
 624
 625         if (get_oid(ctx.qry.head, &oid)) {
 626                 char *old_head = ctx.qry.head;
 627                 ctx.qry.head = xstrdup(ctx.repo->defbranch);
 628                 cgit_print_error_page(404, "Not found",
 629                                 "Invalid branch: %s", old_head);
 630                 free(old_head);
 631                 return 1;
 632         }
 633         string_list_sort(&ctx.repo->submodules);
 634         cgit_prepare_repo_env(ctx.repo);
 635         choose_readme(ctx.repo);
 636         return 0;
 637 }
 638
 639 static inline void open_auth_filter(const char *function)
 640 {
 641         cgit_open_filter(ctx.cfg.auth_filter, function,
 642                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
 643                 ctx.env.request_method ? ctx.env.request_method : "",
 644                 ctx.env.query_string ? ctx.env.query_string : "",
 645                 ctx.env.http_referer ? ctx.env.http_referer : "",
 646                 ctx.env.path_info ? ctx.env.path_info : "",
 647                 ctx.env.http_host ? ctx.env.http_host : "",
 648                 ctx.env.https ? ctx.env.https : "",
 649                 ctx.qry.repo ? ctx.qry.repo : "",
 650                 ctx.qry.page ? ctx.qry.page : "",
 651                 ctx.qry.url ? ctx.qry.url : "",
 652                 cgit_loginurl());
 653 }
 654
 655 /* We intentionally keep this rather small, instead of looping and
 656  * feeding it to the filter a couple bytes at a time. This way, the
 657  * filter itself does not need to handle any denial of service or
 658  * buffer bloat issues. If this winds up being too small, people
 659  * will complain on the mailing list, and we'll increase it as needed. */
 660 #define MAX_AUTHENTICATION_POST_BYTES 4096
 661 /* The filter is expected to spit out "Status: " and all headers. */
 662 static inline void authenticate_post(void)
 663 {
 664         char buffer[MAX_AUTHENTICATION_POST_BYTES];
 665         unsigned int len;
 666
 667         open_auth_filter("authenticate-post");
 668         len = ctx.env.content_length;
 669         if (len > MAX_AUTHENTICATION_POST_BYTES)
 670                 len = MAX_AUTHENTICATION_POST_BYTES;
 671         if (read(STDIN_FILENO, buffer, len) < 0)
 672                 die_errno("Could not read POST from stdin");
 673         if (write(STDOUT_FILENO, buffer, len) < 0)
 674                 die_errno("Could not write POST to stdout");
 675         cgit_close_filter(ctx.cfg.auth_filter);
 676         exit(0);
 677 }
 678
 679 static inline void authenticate_cookie(void)
 680 {
 681         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
 682         if (!ctx.cfg.auth_filter) {
 683                 ctx.env.authenticated = 1;
 684                 return;
 685         }
 686
 687         /* If we're having something POST'd to /login, we're authenticating POST,
 688          * instead of the cookie, so call authenticate_post and bail out early.
 689          * This pattern here should match /?p=login with POST. */
 690         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
 691             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
 692                 authenticate_post();
 693                 return;
 694         }
 695
 696         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
 697         open_auth_filter("authenticate-cookie");
 698         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
 699 }
 700
 701 static void process_request(void)
 702 {
 703         struct cgit_cmd *cmd;
 704         int nongit = 0;
 705
 706         /* If we're not yet authenticated, no matter what page we're on,
 707          * display the authentication body from the auth_filter. This should
 708          * never be cached. */
 709         if (!ctx.env.authenticated) {
 710                 ctx.page.title = "Authentication Required";
 711                 cgit_print_http_headers();
 712                 cgit_print_docstart();
 713                 cgit_print_pageheader();
 714                 open_auth_filter("body");
 715                 cgit_close_filter(ctx.cfg.auth_filter);
 716                 cgit_print_docend();
 717                 return;
 718         }
 719
 720         if (ctx.repo)
 721                 prepare_repo_env(&nongit);
 722
 723         cmd = cgit_get_cmd();
 724         if (!cmd) {
 725                 ctx.page.title = "cgit error";
 726                 cgit_print_error_page(404, "Not found", "Invalid request");
 727                 return;
 728         }
 729
 730         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
 731                 ctx.page.title = "cgit error";
 732                 cgit_print_error_page(404, "Not found", "Invalid request");
 733                 return;
 734         }
 735
 736         if (cmd->want_repo && !ctx.repo) {
 737                 cgit_print_error_page(400, "Bad request",
 738                                 "No repository selected");
 739                 return;
 740         }
 741
 742         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
 743          * in-project path limit to be made available at ctx.qry.vpath.
 744          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
 745          */
 746         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 747
 748         if (ctx.repo && prepare_repo_cmd(nongit))
 749                 return;
 750
 751         cmd->fn();
 752 }
 753
 754 static int cmp_repos(const void *a, const void *b)
 755 {
 756         const struct cgit_repo *ra = a, *rb = b;
 757         return strcmp(ra->url, rb->url);
 758 }
 759
 760 static char *build_snapshot_setting(int bitmap)
 761 {
 762         const struct cgit_snapshot_format *f;
 763         struct strbuf result = STRBUF_INIT;
 764
 765         for (f = cgit_snapshot_formats; f->suffix; f++) {
 766                 if (f->bit & bitmap) {
 767                         if (result.len)
 768                                 strbuf_addch(&result, ' ');
 769                         strbuf_addstr(&result, f->suffix);
 770                 }
 771         }
 772         return strbuf_detach(&result, NULL);
 773 }
 774
 775 static char *get_first_line(char *txt)
 776 {
 777         char *t = xstrdup(txt);
 778         char *p = strchr(t, '\n');
 779         if (p)
 780                 *p = '\0';
 781         return t;
 782 }
 783
 784 static void print_repo(FILE *f, struct cgit_repo *repo)
 785 {
 786         struct string_list_item *item;
 787         fprintf(f, "repo.url=%s\n", repo->url);
 788         fprintf(f, "repo.name=%s\n", repo->name);
 789         fprintf(f, "repo.path=%s\n", repo->path);
 790         if (repo->owner)
 791                 fprintf(f, "repo.owner=%s\n", repo->owner);
 792         if (repo->desc) {
 793                 char *tmp = get_first_line(repo->desc);
 794                 fprintf(f, "repo.desc=%s\n", tmp);
 795                 free(tmp);
 796         }
 797         for_each_string_list_item(item, &repo->readme) {
 798                 if (item->util)
 799                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 800                 else
 801                         fprintf(f, "repo.readme=%s\n", item->string);
 802         }
 803         if (repo->defbranch)
 804                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 805         if (repo->module_link)
 806                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 807         if (repo->section)
 808                 fprintf(f, "repo.section=%s\n", repo->section);
 809         if (repo->homepage)
 810                 fprintf(f, "repo.homepage=%s\n", repo->homepage);
 811         if (repo->clone_url)
 812                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 813         fprintf(f, "repo.enable-commit-graph=%d\n",
 814                 repo->enable_commit_graph);
 815         fprintf(f, "repo.enable-log-filecount=%d\n",
 816                 repo->enable_log_filecount);
 817         fprintf(f, "repo.enable-log-linecount=%d\n",
 818                 repo->enable_log_linecount);
 819         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 820                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 821         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 822                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 823         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 824                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 825         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 826                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 827         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
 828                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 829         if (repo->snapshots != ctx.cfg.snapshots) {
 830                 char *tmp = build_snapshot_setting(repo->snapshots);
 831                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 832                 free(tmp);
 833         }
 834         if (repo->max_stats != ctx.cfg.max_stats)
 835                 fprintf(f, "repo.max-stats=%s\n",
 836                         cgit_find_stats_periodname(repo->max_stats));
 837         if (repo->logo)
 838                 fprintf(f, "repo.logo=%s\n", repo->logo);
 839         if (repo->logo_link)
 840                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 841         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 842         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 843         fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
 844         if (repo->branch_sort == 1)
 845                 fprintf(f, "repo.branch-sort=age\n");
 846         if (repo->commit_sort) {
 847                 if (repo->commit_sort == 1)
 848                         fprintf(f, "repo.commit-sort=date\n");
 849                 else if (repo->commit_sort == 2)
 850                         fprintf(f, "repo.commit-sort=topo\n");
 851         }
 852         fprintf(f, "repo.hide=%d\n", repo->hide);
 853         fprintf(f, "repo.ignore=%d\n", repo->ignore);
 854         fprintf(f, "\n");
 855 }
 856
 857 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 858 {
 859         int i;
 860
 861         for (i = start; i < list->count; i++)
 862                 print_repo(f, &list->repos[i]);
 863 }
 864
 865 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 866  * and return 0 on success.
 867  */
 868 static int generate_cached_repolist(const char *path, const char *cached_rc)
 869 {
 870         struct strbuf locked_rc = STRBUF_INIT;
 871         int result = 0;
 872         int idx;
 873         FILE *f;
 874
 875         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 876         f = fopen(locked_rc.buf, "wx");
 877         if (!f) {
 878                 /* Inform about the error unless the lockfile already existed,
 879                  * since that only means we've got concurrent requests.
 880                  */
 881                 result = errno;
 882                 if (result != EEXIST)
 883                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 884                                 locked_rc.buf, strerror(result), result);
 885                 goto out;
 886         }
 887         idx = cgit_repolist.count;
 888         if (ctx.cfg.project_list)
 889                 scan_projects(path, ctx.cfg.project_list, repo_config);
 890         else
 891                 scan_tree(path, repo_config);
 892         print_repolist(f, &cgit_repolist, idx);
 893         if (rename(locked_rc.buf, cached_rc))
 894                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 895                         locked_rc.buf, cached_rc, strerror(errno), errno);
 896         fclose(f);
 897 out:
 898         strbuf_release(&locked_rc);
 899         return result;
 900 }
 901
 902 static void process_cached_repolist(const char *path)
 903 {
 904         struct stat st;
 905         struct strbuf cached_rc = STRBUF_INIT;
 906         time_t age;
 907         unsigned long hash;
 908
 909         hash = hash_str(path);
 910         if (ctx.cfg.project_list)
 911                 hash += hash_str(ctx.cfg.project_list);
 912         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 913
 914         if (stat(cached_rc.buf, &st)) {
 915                 /* Nothing is cached, we need to scan without forking. And
 916                  * if we fail to generate a cached repolist, we need to
 917                  * invoke scan_tree manually.
 918                  */
 919                 if (generate_cached_repolist(path, cached_rc.buf)) {
 920                         if (ctx.cfg.project_list)
 921                                 scan_projects(path, ctx.cfg.project_list,
 922                                               repo_config);
 923                         else
 924                                 scan_tree(path, repo_config);
 925                 }
 926                 goto out;
 927         }
 928
 929         parse_configfile(cached_rc.buf, config_cb);
 930
 931         /* If the cached configfile hasn't expired, lets exit now */
 932         age = time(NULL) - st.st_mtime;
 933         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 934                 goto out;
 935
 936         /* The cached repolist has been parsed, but it was old. So lets
 937          * rescan the specified path and generate a new cached repolist
 938          * in a child-process to avoid latency for the current request.
 939          */
 940         if (fork())
 941                 goto out;
 942
 943         exit(generate_cached_repolist(path, cached_rc.buf));
 944 out:
 945         strbuf_release(&cached_rc);
 946 }
 947
 948 static void cgit_parse_args(int argc, const char **argv)
 949 {
 950         int i;
 951         const char *arg;
 952         int scan = 0;
 953
 954         for (i = 1; i < argc; i++) {
 955                 if (!strcmp(argv[i], "--version")) {
 956                         printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
 957 #ifdef NO_LUA
 958                         printf("[-] ");
 959 #else
 960                         printf("[+] ");
 961 #endif
 962                         printf("Lua scripting\n");
 963 #ifndef HAVE_LINUX_SENDFILE
 964                         printf("[-] ");
 965 #else
 966                         printf("[+] ");
 967 #endif
 968                         printf("Linux sendfile() usage\n");
 969
 970                         exit(0);
 971                 }
 972                 if (skip_prefix(argv[i], "--cache=", &arg)) {
 973                         ctx.cfg.cache_root = xstrdup(arg);
 974                 } else if (!strcmp(argv[i], "--nocache")) {
 975                         ctx.cfg.nocache = 1;
 976                 } else if (!strcmp(argv[i], "--nohttp")) {
 977                         ctx.env.no_http = "1";
 978                 } else if (skip_prefix(argv[i], "--query=", &arg)) {
 979                         ctx.qry.raw = xstrdup(arg);
 980                 } else if (skip_prefix(argv[i], "--repo=", &arg)) {
 981                         ctx.qry.repo = xstrdup(arg);
 982                 } else if (skip_prefix(argv[i], "--page=", &arg)) {
 983                         ctx.qry.page = xstrdup(arg);
 984                 } else if (skip_prefix(argv[i], "--head=", &arg)) {
 985                         ctx.qry.head = xstrdup(arg);
 986                         ctx.qry.has_symref = 1;
 987                 } else if (skip_prefix(argv[i], "--sha1=", &arg)) {
 988                         ctx.qry.sha1 = xstrdup(arg);
 989                         ctx.qry.has_sha1 = 1;
 990                 } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
 991                         ctx.qry.ofs = atoi(arg);
 992                 } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
 993                            skip_prefix(argv[i], "--scan-path=", &arg)) {
 994                         /*
 995                          * HACK: The global snapshot bit mask defines the set
 996                          * of allowed snapshot formats, but the config file
 997                          * hasn't been parsed yet so the mask is currently 0.
 998                          * By setting all bits high before scanning we make
 999                          * sure that any in-repo cgitrc snapshot setting is
1000                          * respected by scan_tree().
1001                          *
1002                          * NOTE: We assume that there aren't more than 8
1003                          * different snapshot formats supported by cgit...
1004                          */
1005                         ctx.cfg.snapshots = 0xFF;
1006                         scan++;
1007                         scan_tree(arg, repo_config);
1008                 }
1009         }
1010         if (scan) {
1011                 qsort(cgit_repolist.repos, cgit_repolist.count,
1012                         sizeof(struct cgit_repo), cmp_repos);
1013                 print_repolist(stdout, &cgit_repolist, 0);
1014                 exit(0);
1015         }
1016 }
1017
1018 static int calc_ttl(void)
1019 {
1020         if (!ctx.repo)
1021                 return ctx.cfg.cache_root_ttl;
1022
1023         if (!ctx.qry.page)
1024                 return ctx.cfg.cache_repo_ttl;
1025
1026         if (!strcmp(ctx.qry.page, "about"))
1027                 return ctx.cfg.cache_about_ttl;
1028
1029         if (!strcmp(ctx.qry.page, "snapshot"))
1030                 return ctx.cfg.cache_snapshot_ttl;
1031
1032         if (ctx.qry.has_sha1)
1033                 return ctx.cfg.cache_static_ttl;
1034
1035         if (ctx.qry.has_symref)
1036                 return ctx.cfg.cache_dynamic_ttl;
1037
1038         return ctx.cfg.cache_repo_ttl;
1039 }
1040
1041 int cmd_main(int argc, const char **argv)
1042 {
1043         const char *path;
1044         int err, ttl;
1045
1046         cgit_init_filters();
1047         atexit(cgit_cleanup_filters);
1048
1049         prepare_context();
1050         cgit_repolist.length = 0;
1051         cgit_repolist.count = 0;
1052         cgit_repolist.repos = NULL;
1053
1054         cgit_parse_args(argc, argv);
1055         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1056         ctx.repo = NULL;
1057         http_parse_querystring(ctx.qry.raw, querystring_cb);
1058
1059         /* If virtual-root isn't specified in cgitrc, lets pretend
1060          * that virtual-root equals SCRIPT_NAME, minus any possibly
1061          * trailing slashes.
1062          */
1063         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1064                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1065
1066         /* If no url parameter is specified on the querystring, lets
1067          * use PATH_INFO as url. This allows cgit to work with virtual
1068          * urls without the need for rewriterules in the webserver (as
1069          * long as PATH_INFO is included in the cache lookup key).
1070          */
1071         path = ctx.env.path_info;
1072         if (!ctx.qry.url && path) {
1073                 if (path[0] == '/')
1074                         path++;
1075                 ctx.qry.url = xstrdup(path);
1076                 if (ctx.qry.raw) {
1077                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1078                         free(ctx.qry.raw);
1079                         ctx.qry.raw = newqry;
1080                 } else
1081                         ctx.qry.raw = xstrdup(ctx.qry.url);
1082                 cgit_parse_url(ctx.qry.url);
1083         }
1084
1085         /* Before we go any further, we set ctx.env.authenticated by checking to see
1086          * if the supplied cookie is valid. All cookies are valid if there is no
1087          * auth_filter. If there is an auth_filter, the filter decides. */
1088         authenticate_cookie();
1089
1090         ttl = calc_ttl();
1091         if (ttl < 0)
1092                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1093         else
1094                 ctx.page.expires += ttl * 60;
1095         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1096                 ctx.cfg.nocache = 1;
1097         if (ctx.cfg.nocache)
1098                 ctx.cfg.cache_size = 0;
1099         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1100                             ctx.qry.raw, ttl, process_request);
1101         cgit_cleanup_filters();
1102         if (err)
1103                 cgit_print_error("Error processing page: %s (%d)",
1104                                  strerror(err), err);
1105         return err;
1106 }