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 __attribute__((constructor))
  23 static void constructor_environment()
  24 {
  25         /* Do not look in /etc/ for gitconfig and gitattributes. */
  26         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
  27         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
  28         unsetenv("HOME");
  29         unsetenv("XDG_CONFIG_HOME");
  30 }
  31
  32 static void add_mimetype(const char *name, const char *value)
  33 {
  34         struct string_list_item *item;
  35
  36         item = string_list_insert(&ctx.cfg.mimetypes, name);
  37         item->util = xstrdup(value);
  38 }
  39
  40 static void process_cached_repolist(const char *path);
  41
  42 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  43 {
  44         const char *path;
  45         struct string_list_item *item;
  46
  47         if (!strcmp(name, "name"))
  48                 repo->name = xstrdup(value);
  49         else if (!strcmp(name, "clone-url"))
  50                 repo->clone_url = xstrdup(value);
  51         else if (!strcmp(name, "desc"))
  52                 repo->desc = xstrdup(value);
  53         else if (!strcmp(name, "owner"))
  54                 repo->owner = xstrdup(value);
  55         else if (!strcmp(name, "homepage"))
  56                 repo->homepage = xstrdup(value);
  57         else if (!strcmp(name, "defbranch"))
  58                 repo->defbranch = xstrdup(value);
  59         else if (!strcmp(name, "extra-head-content"))
  60                 repo->extra_head_content = xstrdup(value);
  61         else if (!strcmp(name, "snapshots"))
  62                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  63         else if (!strcmp(name, "enable-blame"))
  64                 repo->enable_blame = atoi(value);
  65         else if (!strcmp(name, "enable-commit-graph"))
  66                 repo->enable_commit_graph = atoi(value);
  67         else if (!strcmp(name, "enable-log-filecount"))
  68                 repo->enable_log_filecount = atoi(value);
  69         else if (!strcmp(name, "enable-log-linecount"))
  70                 repo->enable_log_linecount = atoi(value);
  71         else if (!strcmp(name, "enable-remote-branches"))
  72                 repo->enable_remote_branches = atoi(value);
  73         else if (!strcmp(name, "enable-subject-links"))
  74                 repo->enable_subject_links = atoi(value);
  75         else if (!strcmp(name, "enable-html-serving"))
  76                 repo->enable_html_serving = atoi(value);
  77         else if (!strcmp(name, "branch-sort")) {
  78                 if (!strcmp(value, "age"))
  79                         repo->branch_sort = 1;
  80                 if (!strcmp(value, "name"))
  81                         repo->branch_sort = 0;
  82         } else if (!strcmp(name, "commit-sort")) {
  83                 if (!strcmp(value, "date"))
  84                         repo->commit_sort = 1;
  85                 if (!strcmp(value, "topo"))
  86                         repo->commit_sort = 2;
  87         } else if (!strcmp(name, "max-stats"))
  88                 repo->max_stats = cgit_find_stats_period(value, NULL);
  89         else if (!strcmp(name, "module-link"))
  90                 repo->module_link= xstrdup(value);
  91         else if (skip_prefix(name, "module-link.", &path)) {
  92                 item = string_list_append(&repo->submodules, xstrdup(path));
  93                 item->util = xstrdup(value);
  94         } else if (!strcmp(name, "section"))
  95                 repo->section = xstrdup(value);
  96         else if (!strcmp(name, "snapshot-prefix"))
  97                 repo->snapshot_prefix = xstrdup(value);
  98         else if (!strcmp(name, "readme") && value != NULL) {
  99                 if (repo->readme.items == ctx.cfg.readme.items)
 100                         memset(&repo->readme, 0, sizeof(repo->readme));
 101                 string_list_append(&repo->readme, xstrdup(value));
 102         } else if (!strcmp(name, "logo") && value != NULL)
 103                 repo->logo = xstrdup(value);
 104         else if (!strcmp(name, "logo-link") && value != NULL)
 105                 repo->logo_link = xstrdup(value);
 106         else if (!strcmp(name, "hide"))
 107                 repo->hide = atoi(value);
 108         else if (!strcmp(name, "ignore"))
 109                 repo->ignore = atoi(value);
 110         else if (ctx.cfg.enable_filter_overrides) {
 111                 if (!strcmp(name, "about-filter"))
 112                         repo->about_filter = cgit_new_filter(value, ABOUT);
 113                 else if (!strcmp(name, "commit-filter"))
 114                         repo->commit_filter = cgit_new_filter(value, COMMIT);
 115                 else if (!strcmp(name, "source-filter"))
 116                         repo->source_filter = cgit_new_filter(value, SOURCE);
 117                 else if (!strcmp(name, "email-filter"))
 118                         repo->email_filter = cgit_new_filter(value, EMAIL);
 119                 else if (!strcmp(name, "owner-filter"))
 120                         repo->owner_filter = cgit_new_filter(value, OWNER);
 121         }
 122 }
 123
 124 static void config_cb(const char *name, const char *value)
 125 {
 126         const char *arg;
 127
 128         if (!strcmp(name, "section"))
 129                 ctx.cfg.section = xstrdup(value);
 130         else if (!strcmp(name, "repo.url"))
 131                 ctx.repo = cgit_add_repo(value);
 132         else if (ctx.repo && !strcmp(name, "repo.path"))
 133                 ctx.repo->path = trim_end(value, '/');
 134         else if (ctx.repo && skip_prefix(name, "repo.", &arg))
 135                 repo_config(ctx.repo, arg, value);
 136         else if (!strcmp(name, "readme"))
 137                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 138         else if (!strcmp(name, "root-title"))
 139                 ctx.cfg.root_title = xstrdup(value);
 140         else if (!strcmp(name, "root-desc"))
 141                 ctx.cfg.root_desc = xstrdup(value);
 142         else if (!strcmp(name, "root-readme"))
 143                 ctx.cfg.root_readme = xstrdup(value);
 144         else if (!strcmp(name, "css"))
 145                 string_list_append(&ctx.cfg.css, xstrdup(value));
 146         else if (!strcmp(name, "js"))
 147                 string_list_append(&ctx.cfg.js, xstrdup(value));
 148         else if (!strcmp(name, "favicon"))
 149                 ctx.cfg.favicon = xstrdup(value);
 150         else if (!strcmp(name, "footer"))
 151                 ctx.cfg.footer = xstrdup(value);
 152         else if (!strcmp(name, "head-include"))
 153                 ctx.cfg.head_include = xstrdup(value);
 154         else if (!strcmp(name, "header"))
 155                 ctx.cfg.header = xstrdup(value);
 156         else if (!strcmp(name, "logo"))
 157                 ctx.cfg.logo = xstrdup(value);
 158         else if (!strcmp(name, "logo-link"))
 159                 ctx.cfg.logo_link = xstrdup(value);
 160         else if (!strcmp(name, "module-link"))
 161                 ctx.cfg.module_link = xstrdup(value);
 162         else if (!strcmp(name, "strict-export"))
 163                 ctx.cfg.strict_export = xstrdup(value);
 164         else if (!strcmp(name, "virtual-root"))
 165                 ctx.cfg.virtual_root = ensure_end(value, '/');
 166         else if (!strcmp(name, "noplainemail"))
 167                 ctx.cfg.noplainemail = atoi(value);
 168         else if (!strcmp(name, "noheader"))
 169                 ctx.cfg.noheader = atoi(value);
 170         else if (!strcmp(name, "snapshots"))
 171                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 172         else if (!strcmp(name, "enable-filter-overrides"))
 173                 ctx.cfg.enable_filter_overrides = atoi(value);
 174         else if (!strcmp(name, "enable-follow-links"))
 175                 ctx.cfg.enable_follow_links = atoi(value);
 176         else if (!strcmp(name, "enable-http-clone"))
 177                 ctx.cfg.enable_http_clone = atoi(value);
 178         else if (!strcmp(name, "enable-index-links"))
 179                 ctx.cfg.enable_index_links = atoi(value);
 180         else if (!strcmp(name, "enable-index-owner"))
 181                 ctx.cfg.enable_index_owner = atoi(value);
 182         else if (!strcmp(name, "enable-blame"))
 183                 ctx.cfg.enable_blame = atoi(value);
 184         else if (!strcmp(name, "enable-commit-graph"))
 185                 ctx.cfg.enable_commit_graph = atoi(value);
 186         else if (!strcmp(name, "enable-log-filecount"))
 187                 ctx.cfg.enable_log_filecount = atoi(value);
 188         else if (!strcmp(name, "enable-log-linecount"))
 189                 ctx.cfg.enable_log_linecount = atoi(value);
 190         else if (!strcmp(name, "enable-remote-branches"))
 191                 ctx.cfg.enable_remote_branches = atoi(value);
 192         else if (!strcmp(name, "enable-subject-links"))
 193                 ctx.cfg.enable_subject_links = atoi(value);
 194         else if (!strcmp(name, "enable-html-serving"))
 195                 ctx.cfg.enable_html_serving = atoi(value);
 196         else if (!strcmp(name, "enable-tree-linenumbers"))
 197                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 198         else if (!strcmp(name, "enable-git-config"))
 199                 ctx.cfg.enable_git_config = atoi(value);
 200         else if (!strcmp(name, "max-stats"))
 201                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 202         else if (!strcmp(name, "cache-size"))
 203                 ctx.cfg.cache_size = atoi(value);
 204         else if (!strcmp(name, "cache-root"))
 205                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 206         else if (!strcmp(name, "cache-root-ttl"))
 207                 ctx.cfg.cache_root_ttl = atoi(value);
 208         else if (!strcmp(name, "cache-repo-ttl"))
 209                 ctx.cfg.cache_repo_ttl = atoi(value);
 210         else if (!strcmp(name, "cache-scanrc-ttl"))
 211                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 212         else if (!strcmp(name, "cache-static-ttl"))
 213                 ctx.cfg.cache_static_ttl = atoi(value);
 214         else if (!strcmp(name, "cache-dynamic-ttl"))
 215                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 216         else if (!strcmp(name, "cache-about-ttl"))
 217                 ctx.cfg.cache_about_ttl = atoi(value);
 218         else if (!strcmp(name, "cache-snapshot-ttl"))
 219                 ctx.cfg.cache_snapshot_ttl = atoi(value);
 220         else if (!strcmp(name, "case-sensitive-sort"))
 221                 ctx.cfg.case_sensitive_sort = atoi(value);
 222         else if (!strcmp(name, "about-filter"))
 223                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 224         else if (!strcmp(name, "commit-filter"))
 225                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 226         else if (!strcmp(name, "email-filter"))
 227                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 228         else if (!strcmp(name, "owner-filter"))
 229                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
 230         else if (!strcmp(name, "auth-filter"))
 231                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 232         else if (!strcmp(name, "embedded"))
 233                 ctx.cfg.embedded = atoi(value);
 234         else if (!strcmp(name, "max-atom-items"))
 235                 ctx.cfg.max_atom_items = atoi(value);
 236         else if (!strcmp(name, "max-message-length"))
 237                 ctx.cfg.max_msg_len = atoi(value);
 238         else if (!strcmp(name, "max-repodesc-length"))
 239                 ctx.cfg.max_repodesc_len = atoi(value);
 240         else if (!strcmp(name, "max-blob-size"))
 241                 ctx.cfg.max_blob_size = atoi(value);
 242         else if (!strcmp(name, "max-repo-count")) {
 243                 ctx.cfg.max_repo_count = atoi(value);
 244                 if (ctx.cfg.max_repo_count <= 0)
 245                         ctx.cfg.max_repo_count = INT_MAX;
 246         } else if (!strcmp(name, "max-commit-count"))
 247                 ctx.cfg.max_commit_count = atoi(value);
 248         else if (!strcmp(name, "project-list"))
 249                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 250         else if (!strcmp(name, "scan-path"))
 251                 if (ctx.cfg.cache_size)
 252                         process_cached_repolist(expand_macros(value));
 253                 else if (ctx.cfg.project_list)
 254                         scan_projects(expand_macros(value),
 255                                       ctx.cfg.project_list, repo_config);
 256                 else
 257                         scan_tree(expand_macros(value), repo_config);
 258         else if (!strcmp(name, "scan-hidden-path"))
 259                 ctx.cfg.scan_hidden_path = atoi(value);
 260         else if (!strcmp(name, "section-from-path"))
 261                 ctx.cfg.section_from_path = atoi(value);
 262         else if (!strcmp(name, "repository-sort"))
 263                 ctx.cfg.repository_sort = xstrdup(value);
 264         else if (!strcmp(name, "section-sort"))
 265                 ctx.cfg.section_sort = atoi(value);
 266         else if (!strcmp(name, "source-filter"))
 267                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 268         else if (!strcmp(name, "summary-log"))
 269                 ctx.cfg.summary_log = atoi(value);
 270         else if (!strcmp(name, "summary-branches"))
 271                 ctx.cfg.summary_branches = atoi(value);
 272         else if (!strcmp(name, "summary-tags"))
 273                 ctx.cfg.summary_tags = atoi(value);
 274         else if (!strcmp(name, "side-by-side-diffs"))
 275                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 276         else if (!strcmp(name, "agefile"))
 277                 ctx.cfg.agefile = xstrdup(value);
 278         else if (!strcmp(name, "mimetype-file"))
 279                 ctx.cfg.mimetype_file = xstrdup(value);
 280         else if (!strcmp(name, "renamelimit"))
 281                 ctx.cfg.renamelimit = atoi(value);
 282         else if (!strcmp(name, "remove-suffix"))
 283                 ctx.cfg.remove_suffix = atoi(value);
 284         else if (!strcmp(name, "robots"))
 285                 ctx.cfg.robots = xstrdup(value);
 286         else if (!strcmp(name, "clone-prefix"))
 287                 ctx.cfg.clone_prefix = xstrdup(value);
 288         else if (!strcmp(name, "clone-url"))
 289                 ctx.cfg.clone_url = xstrdup(value);
 290         else if (!strcmp(name, "local-time"))
 291                 ctx.cfg.local_time = atoi(value);
 292         else if (!strcmp(name, "commit-sort")) {
 293                 if (!strcmp(value, "date"))
 294                         ctx.cfg.commit_sort = 1;
 295                 if (!strcmp(value, "topo"))
 296                         ctx.cfg.commit_sort = 2;
 297         } else if (!strcmp(name, "branch-sort")) {
 298                 if (!strcmp(value, "age"))
 299                         ctx.cfg.branch_sort = 1;
 300                 if (!strcmp(value, "name"))
 301                         ctx.cfg.branch_sort = 0;
 302         } else if (skip_prefix(name, "mimetype.", &arg))
 303                 add_mimetype(arg, value);
 304         else if (!strcmp(name, "include"))
 305                 parse_configfile(expand_macros(value), config_cb);
 306 }
 307
 308 static void querystring_cb(const char *name, const char *value)
 309 {
 310         if (!value)
 311                 value = "";
 312
 313         if (!strcmp(name,"r")) {
 314                 ctx.qry.repo = xstrdup(value);
 315                 ctx.repo = cgit_get_repoinfo(value);
 316         } else if (!strcmp(name, "p")) {
 317                 ctx.qry.page = xstrdup(value);
 318         } else if (!strcmp(name, "url")) {
 319                 if (*value == '/')
 320                         value++;
 321                 ctx.qry.url = xstrdup(value);
 322                 cgit_parse_url(value);
 323         } else if (!strcmp(name, "qt")) {
 324                 ctx.qry.grep = xstrdup(value);
 325         } else if (!strcmp(name, "q")) {
 326                 ctx.qry.search = xstrdup(value);
 327         } else if (!strcmp(name, "h")) {
 328                 ctx.qry.head = xstrdup(value);
 329                 ctx.qry.has_symref = 1;
 330         } else if (!strcmp(name, "id")) {
 331                 ctx.qry.oid = xstrdup(value);
 332                 ctx.qry.has_oid = 1;
 333         } else if (!strcmp(name, "id2")) {
 334                 ctx.qry.oid2 = xstrdup(value);
 335                 ctx.qry.has_oid = 1;
 336         } else if (!strcmp(name, "ofs")) {
 337                 ctx.qry.ofs = atoi(value);
 338         } else if (!strcmp(name, "path")) {
 339                 ctx.qry.path = trim_end(value, '/');
 340         } else if (!strcmp(name, "name")) {
 341                 ctx.qry.name = xstrdup(value);
 342         } else if (!strcmp(name, "s")) {
 343                 ctx.qry.sort = xstrdup(value);
 344         } else if (!strcmp(name, "showmsg")) {
 345                 ctx.qry.showmsg = atoi(value);
 346         } else if (!strcmp(name, "period")) {
 347                 ctx.qry.period = xstrdup(value);
 348         } else if (!strcmp(name, "dt")) {
 349                 ctx.qry.difftype = atoi(value);
 350                 ctx.qry.has_difftype = 1;
 351         } else if (!strcmp(name, "ss")) {
 352                 /* No longer generated, but there may be links out there. */
 353                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 354                 ctx.qry.has_difftype = 1;
 355         } else if (!strcmp(name, "all")) {
 356                 ctx.qry.show_all = atoi(value);
 357         } else if (!strcmp(name, "context")) {
 358                 ctx.qry.context = atoi(value);
 359         } else if (!strcmp(name, "ignorews")) {
 360                 ctx.qry.ignorews = atoi(value);
 361         } else if (!strcmp(name, "follow")) {
 362                 ctx.qry.follow = atoi(value);
 363         }
 364 }
 365
 366 static void prepare_context(void)
 367 {
 368         memset(&ctx, 0, sizeof(ctx));
 369         ctx.cfg.agefile = "info/web/last-modified";
 370         ctx.cfg.cache_size = 0;
 371         ctx.cfg.cache_max_create_time = 5;
 372         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
 373         ctx.cfg.cache_about_ttl = 15;
 374         ctx.cfg.cache_snapshot_ttl = 5;
 375         ctx.cfg.cache_repo_ttl = 5;
 376         ctx.cfg.cache_root_ttl = 5;
 377         ctx.cfg.cache_scanrc_ttl = 15;
 378         ctx.cfg.cache_dynamic_ttl = 5;
 379         ctx.cfg.cache_static_ttl = -1;
 380         ctx.cfg.case_sensitive_sort = 1;
 381         ctx.cfg.branch_sort = 0;
 382         ctx.cfg.commit_sort = 0;
 383         ctx.cfg.logo = "/cgit.png";
 384         ctx.cfg.favicon = "/favicon.ico";
 385         ctx.cfg.local_time = 0;
 386         ctx.cfg.enable_http_clone = 1;
 387         ctx.cfg.enable_index_owner = 1;
 388         ctx.cfg.enable_tree_linenumbers = 1;
 389         ctx.cfg.enable_git_config = 0;
 390         ctx.cfg.max_repo_count = 50;
 391         ctx.cfg.max_commit_count = 50;
 392         ctx.cfg.max_lock_attempts = 5;
 393         ctx.cfg.max_msg_len = 80;
 394         ctx.cfg.max_repodesc_len = 80;
 395         ctx.cfg.max_blob_size = 0;
 396         ctx.cfg.max_stats = 0;
 397         ctx.cfg.project_list = NULL;
 398         ctx.cfg.renamelimit = -1;
 399         ctx.cfg.remove_suffix = 0;
 400         ctx.cfg.robots = "index, nofollow";
 401         ctx.cfg.root_title = "Git repository browser";
 402         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 403         ctx.cfg.scan_hidden_path = 0;
 404         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
 405         ctx.cfg.section = "";
 406         ctx.cfg.repository_sort = "name";
 407         ctx.cfg.section_sort = 1;
 408         ctx.cfg.summary_branches = 10;
 409         ctx.cfg.summary_log = 10;
 410         ctx.cfg.summary_tags = 10;
 411         ctx.cfg.max_atom_items = 10;
 412         ctx.cfg.difftype = DIFF_UNIFIED;
 413         ctx.env.cgit_config = getenv("CGIT_CONFIG");
 414         ctx.env.http_host = getenv("HTTP_HOST");
 415         ctx.env.https = getenv("HTTPS");
 416         ctx.env.no_http = getenv("NO_HTTP");
 417         ctx.env.path_info = getenv("PATH_INFO");
 418         ctx.env.query_string = getenv("QUERY_STRING");
 419         ctx.env.request_method = getenv("REQUEST_METHOD");
 420         ctx.env.script_name = getenv("SCRIPT_NAME");
 421         ctx.env.server_name = getenv("SERVER_NAME");
 422         ctx.env.server_port = getenv("SERVER_PORT");
 423         ctx.env.http_cookie = getenv("HTTP_COOKIE");
 424         ctx.env.http_referer = getenv("HTTP_REFERER");
 425         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
 426         ctx.env.authenticated = 0;
 427         ctx.page.mimetype = "text/html";
 428         ctx.page.charset = PAGE_ENCODING;
 429         ctx.page.filename = NULL;
 430         ctx.page.size = 0;
 431         ctx.page.modified = time(NULL);
 432         ctx.page.expires = ctx.page.modified;
 433         ctx.page.etag = NULL;
 434         string_list_init_dup(&ctx.cfg.mimetypes);
 435         if (ctx.env.script_name)
 436                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
 437         if (ctx.env.query_string)
 438                 ctx.qry.raw = xstrdup(ctx.env.query_string);
 439         if (!ctx.env.cgit_config)
 440                 ctx.env.cgit_config = CGIT_CONFIG;
 441 }
 442
 443 struct refmatch {
 444         char *req_ref;
 445         char *first_ref;
 446         int match;
 447 };
 448
 449 static int find_current_ref(const char *refname, const struct object_id *oid,
 450                             int flags, void *cb_data)
 451 {
 452         struct refmatch *info;
 453
 454         info = (struct refmatch *)cb_data;
 455         if (!strcmp(refname, info->req_ref))
 456                 info->match = 1;
 457         if (!info->first_ref)
 458                 info->first_ref = xstrdup(refname);
 459         return info->match;
 460 }
 461
 462 static void free_refmatch_inner(struct refmatch *info)
 463 {
 464         if (info->first_ref)
 465                 free(info->first_ref);
 466 }
 467
 468 static char *find_default_branch(struct cgit_repo *repo)
 469 {
 470         struct refmatch info;
 471         char *ref;
 472
 473         info.req_ref = repo->defbranch;
 474         info.first_ref = NULL;
 475         info.match = 0;
 476         for_each_branch_ref(find_current_ref, &info);
 477         if (info.match)
 478                 ref = info.req_ref;
 479         else
 480                 ref = info.first_ref;
 481         if (ref)
 482                 ref = xstrdup(ref);
 483         free_refmatch_inner(&info);
 484
 485         return ref;
 486 }
 487
 488 static char *guess_defbranch(void)
 489 {
 490         const char *ref, *refname;
 491         struct object_id oid;
 492
 493         ref = resolve_ref_unsafe("HEAD", 0, &oid, NULL);
 494         if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
 495                 return "master";
 496         return xstrdup(refname);
 497 }
 498
 499 /* The caller must free filename and ref after calling this. */
 500 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 501 {
 502         const char *colon;
 503
 504         *filename = NULL;
 505         *ref = NULL;
 506
 507         if (!readme || !readme[0])
 508                 return;
 509
 510         /* Check if the readme is tracked in the git repo. */
 511         colon = strchr(readme, ':');
 512         if (colon && strlen(colon) > 1) {
 513                 /* If it starts with a colon, we want to use head given
 514                  * from query or the default branch */
 515                 if (colon == readme && ctx.qry.head)
 516                         *ref = xstrdup(ctx.qry.head);
 517                 else if (colon == readme && repo->defbranch)
 518                         *ref = xstrdup(repo->defbranch);
 519                 else
 520                         *ref = xstrndup(readme, colon - readme);
 521                 readme = colon + 1;
 522         }
 523
 524         /* Prepend repo path to relative readme path unless tracked. */
 525         if (!(*ref) && readme[0] != '/')
 526                 *filename = fmtalloc("%s/%s", repo->path, readme);
 527         else
 528                 *filename = xstrdup(readme);
 529 }
 530 static void choose_readme(struct cgit_repo *repo)
 531 {
 532         int found;
 533         char *filename, *ref;
 534         struct string_list_item *entry;
 535
 536         if (!repo->readme.nr)
 537                 return;
 538
 539         found = 0;
 540         for_each_string_list_item(entry, &repo->readme) {
 541                 parse_readme(entry->string, &filename, &ref, repo);
 542                 if (!filename) {
 543                         free(filename);
 544                         free(ref);
 545                         continue;
 546                 }
 547                 if (ref) {
 548                         if (cgit_ref_path_exists(filename, ref, 1)) {
 549                                 found = 1;
 550                                 break;
 551                         }
 552                 }
 553                 else if (!access(filename, R_OK)) {
 554                         found = 1;
 555                         break;
 556                 }
 557                 free(filename);
 558                 free(ref);
 559         }
 560         repo->readme.strdup_strings = 1;
 561         string_list_clear(&repo->readme, 0);
 562         repo->readme.strdup_strings = 0;
 563         if (found)
 564                 string_list_append(&repo->readme, filename)->util = ref;
 565 }
 566
 567 static void print_no_repo_clone_urls(const char *url)
 568 {
 569         html("<tr><td><a rel='vcs-git' href='");
 570         html_url_path(url);
 571         html("' title='");
 572         html_attr(ctx.repo->name);
 573         html(" Git repository'>");
 574         html_txt(url);
 575         html("</a></td></tr>\n");
 576 }
 577
 578 static void prepare_repo_env(int *nongit)
 579 {
 580         /* The path to the git repository. */
 581         setenv("GIT_DIR", ctx.repo->path, 1);
 582
 583         /* Setup the git directory and initialize the notes system. Both of these
 584          * load local configuration from the git repository, so we do them both while
 585          * the HOME variables are unset. */
 586         setup_git_directory_gently(nongit);
 587         load_display_notes(NULL);
 588 }
 589
 590 static int prepare_repo_cmd(int nongit)
 591 {
 592         struct object_id oid;
 593         int rc;
 594
 595         if (nongit) {
 596                 const char *name = ctx.repo->name;
 597                 rc = errno;
 598                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 599                                                 "config error");
 600                 ctx.repo = NULL;
 601                 cgit_print_http_headers();
 602                 cgit_print_docstart();
 603                 cgit_print_pageheader();
 604                 cgit_print_error("Failed to open %s: %s", name,
 605                                  rc ? strerror(rc) : "Not a valid git repository");
 606                 cgit_print_docend();
 607                 return 1;
 608         }
 609         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 610
 611         if (!ctx.repo->defbranch)
 612                 ctx.repo->defbranch = guess_defbranch();
 613
 614         if (!ctx.qry.head) {
 615                 ctx.qry.nohead = 1;
 616                 ctx.qry.head = find_default_branch(ctx.repo);
 617         }
 618
 619         if (!ctx.qry.head) {
 620                 cgit_print_http_headers();
 621                 cgit_print_docstart();
 622                 cgit_print_pageheader();
 623                 cgit_print_error("Repository seems to be empty");
 624                 if (!strcmp(ctx.qry.page, "summary")) {
 625                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
 626                         cgit_prepare_repo_env(ctx.repo);
 627                         cgit_add_clone_urls(print_no_repo_clone_urls);
 628                         html("</table>\n");
 629                 }
 630                 cgit_print_docend();
 631                 return 1;
 632         }
 633
 634         if (get_oid(ctx.qry.head, &oid)) {
 635                 char *old_head = ctx.qry.head;
 636                 ctx.qry.head = xstrdup(ctx.repo->defbranch);
 637                 cgit_print_error_page(404, "Not found",
 638                                 "Invalid branch: %s", old_head);
 639                 free(old_head);
 640                 return 1;
 641         }
 642         string_list_sort(&ctx.repo->submodules);
 643         cgit_prepare_repo_env(ctx.repo);
 644         choose_readme(ctx.repo);
 645         return 0;
 646 }
 647
 648 static inline void open_auth_filter(const char *function)
 649 {
 650         cgit_open_filter(ctx.cfg.auth_filter, function,
 651                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
 652                 ctx.env.request_method ? ctx.env.request_method : "",
 653                 ctx.env.query_string ? ctx.env.query_string : "",
 654                 ctx.env.http_referer ? ctx.env.http_referer : "",
 655                 ctx.env.path_info ? ctx.env.path_info : "",
 656                 ctx.env.http_host ? ctx.env.http_host : "",
 657                 ctx.env.https ? ctx.env.https : "",
 658                 ctx.qry.repo ? ctx.qry.repo : "",
 659                 ctx.qry.page ? ctx.qry.page : "",
 660                 cgit_currentfullurl(),
 661                 cgit_loginurl());
 662 }
 663
 664 /* We intentionally keep this rather small, instead of looping and
 665  * feeding it to the filter a couple bytes at a time. This way, the
 666  * filter itself does not need to handle any denial of service or
 667  * buffer bloat issues. If this winds up being too small, people
 668  * will complain on the mailing list, and we'll increase it as needed. */
 669 #define MAX_AUTHENTICATION_POST_BYTES 4096
 670 /* The filter is expected to spit out "Status: " and all headers. */
 671 static inline void authenticate_post(void)
 672 {
 673         char buffer[MAX_AUTHENTICATION_POST_BYTES];
 674         ssize_t len;
 675
 676         open_auth_filter("authenticate-post");
 677         len = ctx.env.content_length;
 678         if (len > MAX_AUTHENTICATION_POST_BYTES)
 679                 len = MAX_AUTHENTICATION_POST_BYTES;
 680         if ((len = read(STDIN_FILENO, buffer, len)) < 0)
 681                 die_errno("Could not read POST from stdin");
 682         if (write(STDOUT_FILENO, buffer, len) < 0)
 683                 die_errno("Could not write POST to stdout");
 684         cgit_close_filter(ctx.cfg.auth_filter);
 685         exit(0);
 686 }
 687
 688 static inline void authenticate_cookie(void)
 689 {
 690         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
 691         if (!ctx.cfg.auth_filter) {
 692                 ctx.env.authenticated = 1;
 693                 return;
 694         }
 695
 696         /* If we're having something POST'd to /login, we're authenticating POST,
 697          * instead of the cookie, so call authenticate_post and bail out early.
 698          * This pattern here should match /?p=login with POST. */
 699         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
 700             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
 701                 authenticate_post();
 702                 return;
 703         }
 704
 705         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
 706         open_auth_filter("authenticate-cookie");
 707         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
 708 }
 709
 710 static void process_request(void)
 711 {
 712         struct cgit_cmd *cmd;
 713         int nongit = 0;
 714
 715         /* If we're not yet authenticated, no matter what page we're on,
 716          * display the authentication body from the auth_filter. This should
 717          * never be cached. */
 718         if (!ctx.env.authenticated) {
 719                 ctx.page.title = "Authentication Required";
 720                 cgit_print_http_headers();
 721                 cgit_print_docstart();
 722                 cgit_print_pageheader();
 723                 open_auth_filter("body");
 724                 cgit_close_filter(ctx.cfg.auth_filter);
 725                 cgit_print_docend();
 726                 return;
 727         }
 728
 729         if (ctx.repo)
 730                 prepare_repo_env(&nongit);
 731
 732         cmd = cgit_get_cmd();
 733         if (!cmd) {
 734                 ctx.page.title = "cgit error";
 735                 cgit_print_error_page(404, "Not found", "Invalid request");
 736                 return;
 737         }
 738
 739         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
 740                 ctx.page.title = "cgit error";
 741                 cgit_print_error_page(404, "Not found", "Invalid request");
 742                 return;
 743         }
 744
 745         if (cmd->want_repo && !ctx.repo) {
 746                 cgit_print_error_page(400, "Bad request",
 747                                 "No repository selected");
 748                 return;
 749         }
 750
 751         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
 752          * in-project path limit to be made available at ctx.qry.vpath.
 753          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
 754          */
 755         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 756
 757         if (ctx.repo && prepare_repo_cmd(nongit))
 758                 return;
 759
 760         cmd->fn();
 761 }
 762
 763 static int cmp_repos(const void *a, const void *b)
 764 {
 765         const struct cgit_repo *ra = a, *rb = b;
 766         return strcmp(ra->url, rb->url);
 767 }
 768
 769 static char *build_snapshot_setting(int bitmap)
 770 {
 771         const struct cgit_snapshot_format *f;
 772         struct strbuf result = STRBUF_INIT;
 773
 774         for (f = cgit_snapshot_formats; f->suffix; f++) {
 775                 if (cgit_snapshot_format_bit(f) & bitmap) {
 776                         if (result.len)
 777                                 strbuf_addch(&result, ' ');
 778                         strbuf_addstr(&result, f->suffix);
 779                 }
 780         }
 781         return strbuf_detach(&result, NULL);
 782 }
 783
 784 static char *get_first_line(char *txt)
 785 {
 786         char *t = xstrdup(txt);
 787         char *p = strchr(t, '\n');
 788         if (p)
 789                 *p = '\0';
 790         return t;
 791 }
 792
 793 static void print_repo(FILE *f, struct cgit_repo *repo)
 794 {
 795         struct string_list_item *item;
 796         fprintf(f, "repo.url=%s\n", repo->url);
 797         fprintf(f, "repo.name=%s\n", repo->name);
 798         fprintf(f, "repo.path=%s\n", repo->path);
 799         if (repo->owner)
 800                 fprintf(f, "repo.owner=%s\n", repo->owner);
 801         if (repo->desc) {
 802                 char *tmp = get_first_line(repo->desc);
 803                 fprintf(f, "repo.desc=%s\n", tmp);
 804                 free(tmp);
 805         }
 806         for_each_string_list_item(item, &repo->readme) {
 807                 if (item->util)
 808                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 809                 else
 810                         fprintf(f, "repo.readme=%s\n", item->string);
 811         }
 812         if (repo->defbranch)
 813                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 814         if (repo->extra_head_content)
 815                 fprintf(f, "repo.extra-head-content=%s\n", repo->extra_head_content);
 816         if (repo->module_link)
 817                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 818         if (repo->section)
 819                 fprintf(f, "repo.section=%s\n", repo->section);
 820         if (repo->homepage)
 821                 fprintf(f, "repo.homepage=%s\n", repo->homepage);
 822         if (repo->clone_url)
 823                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 824         fprintf(f, "repo.enable-blame=%d\n",
 825                 repo->enable_blame);
 826         fprintf(f, "repo.enable-commit-graph=%d\n",
 827                 repo->enable_commit_graph);
 828         fprintf(f, "repo.enable-log-filecount=%d\n",
 829                 repo->enable_log_filecount);
 830         fprintf(f, "repo.enable-log-linecount=%d\n",
 831                 repo->enable_log_linecount);
 832         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 833                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 834         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 835                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 836         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 837                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 838         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 839                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 840         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
 841                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 842         if (repo->snapshots != ctx.cfg.snapshots) {
 843                 char *tmp = build_snapshot_setting(repo->snapshots);
 844                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 845                 free(tmp);
 846         }
 847         if (repo->snapshot_prefix)
 848                 fprintf(f, "repo.snapshot-prefix=%s\n", repo->snapshot_prefix);
 849         if (repo->max_stats != ctx.cfg.max_stats)
 850                 fprintf(f, "repo.max-stats=%s\n",
 851                         cgit_find_stats_periodname(repo->max_stats));
 852         if (repo->logo)
 853                 fprintf(f, "repo.logo=%s\n", repo->logo);
 854         if (repo->logo_link)
 855                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 856         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 857         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 858         fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
 859         if (repo->branch_sort == 1)
 860                 fprintf(f, "repo.branch-sort=age\n");
 861         if (repo->commit_sort) {
 862                 if (repo->commit_sort == 1)
 863                         fprintf(f, "repo.commit-sort=date\n");
 864                 else if (repo->commit_sort == 2)
 865                         fprintf(f, "repo.commit-sort=topo\n");
 866         }
 867         fprintf(f, "repo.hide=%d\n", repo->hide);
 868         fprintf(f, "repo.ignore=%d\n", repo->ignore);
 869         fprintf(f, "\n");
 870 }
 871
 872 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 873 {
 874         int i;
 875
 876         for (i = start; i < list->count; i++)
 877                 print_repo(f, &list->repos[i]);
 878 }
 879
 880 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 881  * and return 0 on success.
 882  */
 883 static int generate_cached_repolist(const char *path, const char *cached_rc)
 884 {
 885         struct strbuf locked_rc = STRBUF_INIT;
 886         int result = 0;
 887         int idx;
 888         FILE *f;
 889
 890         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 891         f = fopen(locked_rc.buf, "wx");
 892         if (!f) {
 893                 /* Inform about the error unless the lockfile already existed,
 894                  * since that only means we've got concurrent requests.
 895                  */
 896                 result = errno;
 897                 if (result != EEXIST)
 898                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 899                                 locked_rc.buf, strerror(result), result);
 900                 goto out;
 901         }
 902         idx = cgit_repolist.count;
 903         if (ctx.cfg.project_list)
 904                 scan_projects(path, ctx.cfg.project_list, repo_config);
 905         else
 906                 scan_tree(path, repo_config);
 907         print_repolist(f, &cgit_repolist, idx);
 908         if (rename(locked_rc.buf, cached_rc))
 909                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 910                         locked_rc.buf, cached_rc, strerror(errno), errno);
 911         fclose(f);
 912 out:
 913         strbuf_release(&locked_rc);
 914         return result;
 915 }
 916
 917 static void process_cached_repolist(const char *path)
 918 {
 919         struct stat st;
 920         struct strbuf cached_rc = STRBUF_INIT;
 921         time_t age;
 922         unsigned long hash;
 923
 924         hash = hash_str(path);
 925         if (ctx.cfg.project_list)
 926                 hash += hash_str(ctx.cfg.project_list);
 927         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 928
 929         if (stat(cached_rc.buf, &st)) {
 930                 /* Nothing is cached, we need to scan without forking. And
 931                  * if we fail to generate a cached repolist, we need to
 932                  * invoke scan_tree manually.
 933                  */
 934                 if (generate_cached_repolist(path, cached_rc.buf)) {
 935                         if (ctx.cfg.project_list)
 936                                 scan_projects(path, ctx.cfg.project_list,
 937                                               repo_config);
 938                         else
 939                                 scan_tree(path, repo_config);
 940                 }
 941                 goto out;
 942         }
 943
 944         parse_configfile(cached_rc.buf, config_cb);
 945
 946         /* If the cached configfile hasn't expired, lets exit now */
 947         age = time(NULL) - st.st_mtime;
 948         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 949                 goto out;
 950
 951         /* The cached repolist has been parsed, but it was old. So lets
 952          * rescan the specified path and generate a new cached repolist
 953          * in a child-process to avoid latency for the current request.
 954          */
 955         if (fork())
 956                 goto out;
 957
 958         exit(generate_cached_repolist(path, cached_rc.buf));
 959 out:
 960         strbuf_release(&cached_rc);
 961 }
 962
 963 static void cgit_parse_args(int argc, const char **argv)
 964 {
 965         int i;
 966         const char *arg;
 967         int scan = 0;
 968
 969         for (i = 1; i < argc; i++) {
 970                 if (!strcmp(argv[i], "--version")) {
 971                         printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
 972 #ifdef NO_LUA
 973                         printf("[-] ");
 974 #else
 975                         printf("[+] ");
 976 #endif
 977                         printf("Lua scripting\n");
 978 #ifndef HAVE_LINUX_SENDFILE
 979                         printf("[-] ");
 980 #else
 981                         printf("[+] ");
 982 #endif
 983                         printf("Linux sendfile() usage\n");
 984
 985                         exit(0);
 986                 }
 987                 if (skip_prefix(argv[i], "--cache=", &arg)) {
 988                         ctx.cfg.cache_root = xstrdup(arg);
 989                 } else if (!strcmp(argv[i], "--nohttp")) {
 990                         ctx.env.no_http = "1";
 991                 } else if (skip_prefix(argv[i], "--query=", &arg)) {
 992                         ctx.qry.raw = xstrdup(arg);
 993                 } else if (skip_prefix(argv[i], "--repo=", &arg)) {
 994                         ctx.qry.repo = xstrdup(arg);
 995                 } else if (skip_prefix(argv[i], "--page=", &arg)) {
 996                         ctx.qry.page = xstrdup(arg);
 997                 } else if (skip_prefix(argv[i], "--head=", &arg)) {
 998                         ctx.qry.head = xstrdup(arg);
 999                         ctx.qry.has_symref = 1;
1000                 } else if (skip_prefix(argv[i], "--oid=", &arg)) {
1001                         ctx.qry.oid = xstrdup(arg);
1002                         ctx.qry.has_oid = 1;
1003                 } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
1004                         ctx.qry.ofs = atoi(arg);
1005                 } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
1006                            skip_prefix(argv[i], "--scan-path=", &arg)) {
1007                         /*
1008                          * HACK: The global snapshot bit mask defines the set
1009                          * of allowed snapshot formats, but the config file
1010                          * hasn't been parsed yet so the mask is currently 0.
1011                          * By setting all bits high before scanning we make
1012                          * sure that any in-repo cgitrc snapshot setting is
1013                          * respected by scan_tree().
1014                          *
1015                          * NOTE: We assume that there aren't more than 8
1016                          * different snapshot formats supported by cgit...
1017                          */
1018                         ctx.cfg.snapshots = 0xFF;
1019                         scan++;
1020                         scan_tree(arg, repo_config);
1021                 }
1022         }
1023         if (scan) {
1024                 qsort(cgit_repolist.repos, cgit_repolist.count,
1025                         sizeof(struct cgit_repo), cmp_repos);
1026                 print_repolist(stdout, &cgit_repolist, 0);
1027                 exit(0);
1028         }
1029 }
1030
1031 static int calc_ttl(void)
1032 {
1033         if (!ctx.repo)
1034                 return ctx.cfg.cache_root_ttl;
1035
1036         if (!ctx.qry.page)
1037                 return ctx.cfg.cache_repo_ttl;
1038
1039         if (!strcmp(ctx.qry.page, "about"))
1040                 return ctx.cfg.cache_about_ttl;
1041
1042         if (!strcmp(ctx.qry.page, "snapshot"))
1043                 return ctx.cfg.cache_snapshot_ttl;
1044
1045         if (ctx.qry.has_oid)
1046                 return ctx.cfg.cache_static_ttl;
1047
1048         if (ctx.qry.has_symref)
1049                 return ctx.cfg.cache_dynamic_ttl;
1050
1051         return ctx.cfg.cache_repo_ttl;
1052 }
1053
1054 int cmd_main(int argc, const char **argv)
1055 {
1056         const char *path;
1057         int err, ttl;
1058
1059         cgit_init_filters();
1060         atexit(cgit_cleanup_filters);
1061
1062         prepare_context();
1063         cgit_repolist.length = 0;
1064         cgit_repolist.count = 0;
1065         cgit_repolist.repos = NULL;
1066
1067         cgit_parse_args(argc, argv);
1068         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1069         ctx.repo = NULL;
1070         http_parse_querystring(ctx.qry.raw, querystring_cb);
1071
1072         /* If virtual-root isn't specified in cgitrc, lets pretend
1073          * that virtual-root equals SCRIPT_NAME, minus any possibly
1074          * trailing slashes.
1075          */
1076         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1077                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1078
1079         /* If no url parameter is specified on the querystring, lets
1080          * use PATH_INFO as url. This allows cgit to work with virtual
1081          * urls without the need for rewriterules in the webserver (as
1082          * long as PATH_INFO is included in the cache lookup key).
1083          */
1084         path = ctx.env.path_info;
1085         if (!ctx.qry.url && path) {
1086                 if (path[0] == '/')
1087                         path++;
1088                 ctx.qry.url = xstrdup(path);
1089                 if (ctx.qry.raw) {
1090                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1091                         free(ctx.qry.raw);
1092                         ctx.qry.raw = newqry;
1093                 } else
1094                         ctx.qry.raw = xstrdup(ctx.qry.url);
1095                 cgit_parse_url(ctx.qry.url);
1096         }
1097
1098         /* Before we go any further, we set ctx.env.authenticated by checking to see
1099          * if the supplied cookie is valid. All cookies are valid if there is no
1100          * auth_filter. If there is an auth_filter, the filter decides. */
1101         authenticate_cookie();
1102
1103         ttl = calc_ttl();
1104         if (ttl < 0)
1105                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1106         else
1107                 ctx.page.expires += ttl * 60;
1108         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1109                 ctx.cfg.cache_size = 0;
1110         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1111                             ctx.qry.raw, ttl, process_request);
1112         cgit_cleanup_filters();
1113         if (err)
1114                 cgit_print_error("Error processing page: %s (%d)",
1115                                  strerror(err), err);
1116         return err;
1117 }