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