cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "cache.h"
  11 #include "cmd.h"
  12 #include "configfile.h"
  13 #include "html.h"
  14 #include "ui-shared.h"
  15 #include "ui-stats.h"
  16 #include "ui-blob.h"
  17 #include "ui-summary.h"
  18 #include "scan-tree.h"
  19
  20 const char *cgit_version = CGIT_VERSION;
  21
  22 static void add_mimetype(const char *name, const char *value)
  23 {
  24         struct string_list_item *item;
  25
  26         item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
  27         item->util = xstrdup(value);
  28 }
  29
  30 static void process_cached_repolist(const char *path);
  31
  32 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  33 {
  34         const char *path;
  35         struct string_list_item *item;
  36
  37         if (!strcmp(name, "name"))
  38                 repo->name = xstrdup(value);
  39         else if (!strcmp(name, "clone-url"))
  40                 repo->clone_url = xstrdup(value);
  41         else if (!strcmp(name, "desc"))
  42                 repo->desc = xstrdup(value);
  43         else if (!strcmp(name, "owner"))
  44                 repo->owner = xstrdup(value);
  45         else if (!strcmp(name, "homepage"))
  46                 repo->homepage = xstrdup(value);
  47         else if (!strcmp(name, "defbranch"))
  48                 repo->defbranch = xstrdup(value);
  49         else if (!strcmp(name, "snapshots"))
  50                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  51         else if (!strcmp(name, "enable-commit-graph"))
  52                 repo->enable_commit_graph = atoi(value);
  53         else if (!strcmp(name, "enable-log-filecount"))
  54                 repo->enable_log_filecount = atoi(value);
  55         else if (!strcmp(name, "enable-log-linecount"))
  56                 repo->enable_log_linecount = atoi(value);
  57         else if (!strcmp(name, "enable-remote-branches"))
  58                 repo->enable_remote_branches = atoi(value);
  59         else if (!strcmp(name, "enable-subject-links"))
  60                 repo->enable_subject_links = atoi(value);
  61         else if (!strcmp(name, "enable-html-serving"))
  62                 repo->enable_html_serving = atoi(value);
  63         else if (!strcmp(name, "branch-sort")) {
  64                 if (!strcmp(value, "age"))
  65                         repo->branch_sort = 1;
  66                 if (!strcmp(value, "name"))
  67                         repo->branch_sort = 0;
  68         } else if (!strcmp(name, "commit-sort")) {
  69                 if (!strcmp(value, "date"))
  70                         repo->commit_sort = 1;
  71                 if (!strcmp(value, "topo"))
  72                         repo->commit_sort = 2;
  73         } else if (!strcmp(name, "max-stats"))
  74                 repo->max_stats = cgit_find_stats_period(value, NULL);
  75         else if (!strcmp(name, "module-link"))
  76                 repo->module_link= xstrdup(value);
  77         else if (skip_prefix(name, "module-link.", &path)) {
  78                 item = string_list_append(&repo->submodules, xstrdup(path));
  79                 item->util = xstrdup(value);
  80         } else if (!strcmp(name, "section"))
  81                 repo->section = xstrdup(value);
  82         else if (!strcmp(name, "snapshot-prefix"))
  83                 repo->snapshot_prefix = xstrdup(value);
  84         else if (!strcmp(name, "readme") && value != NULL) {
  85                 if (repo->readme.items == ctx.cfg.readme.items)
  86                         memset(&repo->readme, 0, sizeof(repo->readme));
  87                 string_list_append(&repo->readme, xstrdup(value));
  88         } else if (!strcmp(name, "logo") && value != NULL)
  89                 repo->logo = xstrdup(value);
  90         else if (!strcmp(name, "logo-link") && value != NULL)
  91                 repo->logo_link = xstrdup(value);
  92         else if (!strcmp(name, "hide"))
  93                 repo->hide = atoi(value);
  94         else if (!strcmp(name, "ignore"))
  95                 repo->ignore = atoi(value);
  96         else if (ctx.cfg.enable_filter_overrides) {
  97                 if (!strcmp(name, "about-filter"))
  98                         repo->about_filter = cgit_new_filter(value, ABOUT);
  99                 else if (!strcmp(name, "commit-filter"))
 100                         repo->commit_filter = cgit_new_filter(value, COMMIT);
 101                 else if (!strcmp(name, "source-filter"))
 102                         repo->source_filter = cgit_new_filter(value, SOURCE);
 103                 else if (!strcmp(name, "email-filter"))
 104                         repo->email_filter = cgit_new_filter(value, EMAIL);
 105                 else if (!strcmp(name, "owner-filter"))
 106                         repo->owner_filter = cgit_new_filter(value, OWNER);
 107         }
 108 }
 109
 110 static void config_cb(const char *name, const char *value)
 111 {
 112         const char *arg;
 113
 114         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 115                 ctx.cfg.section = xstrdup(value);
 116         else if (!strcmp(name, "repo.url"))
 117                 ctx.repo = cgit_add_repo(value);
 118         else if (ctx.repo && !strcmp(name, "repo.path"))
 119                 ctx.repo->path = trim_end(value, '/');
 120         else if (ctx.repo && skip_prefix(name, "repo.", &arg))
 121                 repo_config(ctx.repo, arg, value);
 122         else if (!strcmp(name, "readme"))
 123                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 124         else if (!strcmp(name, "root-title"))
 125                 ctx.cfg.root_title = xstrdup(value);
 126         else if (!strcmp(name, "root-desc"))
 127                 ctx.cfg.root_desc = xstrdup(value);
 128         else if (!strcmp(name, "root-readme"))
 129                 ctx.cfg.root_readme = xstrdup(value);
 130         else if (!strcmp(name, "css"))
 131                 ctx.cfg.css = xstrdup(value);
 132         else if (!strcmp(name, "favicon"))
 133                 ctx.cfg.favicon = xstrdup(value);
 134         else if (!strcmp(name, "footer"))
 135                 ctx.cfg.footer = xstrdup(value);
 136         else if (!strcmp(name, "head-include"))
 137                 ctx.cfg.head_include = xstrdup(value);
 138         else if (!strcmp(name, "header"))
 139                 ctx.cfg.header = xstrdup(value);
 140         else if (!strcmp(name, "logo"))
 141                 ctx.cfg.logo = xstrdup(value);
 142         else if (!strcmp(name, "index-header"))
 143                 ctx.cfg.index_header = xstrdup(value);
 144         else if (!strcmp(name, "index-info"))
 145                 ctx.cfg.index_info = xstrdup(value);
 146         else if (!strcmp(name, "logo-link"))
 147                 ctx.cfg.logo_link = xstrdup(value);
 148         else if (!strcmp(name, "module-link"))
 149                 ctx.cfg.module_link = xstrdup(value);
 150         else if (!strcmp(name, "strict-export"))
 151                 ctx.cfg.strict_export = xstrdup(value);
 152         else if (!strcmp(name, "virtual-root")) {
 153                 ctx.cfg.virtual_root = ensure_end(value, '/');
 154         } else if (!strcmp(name, "nocache"))
 155                 ctx.cfg.nocache = atoi(value);
 156         else if (!strcmp(name, "noplainemail"))
 157                 ctx.cfg.noplainemail = atoi(value);
 158         else if (!strcmp(name, "noheader"))
 159                 ctx.cfg.noheader = atoi(value);
 160         else if (!strcmp(name, "snapshots"))
 161                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 162         else if (!strcmp(name, "enable-filter-overrides"))
 163                 ctx.cfg.enable_filter_overrides = atoi(value);
 164         else if (!strcmp(name, "enable-follow-links"))
 165                 ctx.cfg.enable_follow_links = atoi(value);
 166         else if (!strcmp(name, "enable-http-clone"))
 167                 ctx.cfg.enable_http_clone = atoi(value);
 168         else if (!strcmp(name, "enable-index-links"))
 169                 ctx.cfg.enable_index_links = atoi(value);
 170         else if (!strcmp(name, "enable-index-owner"))
 171                 ctx.cfg.enable_index_owner = atoi(value);
 172         else if (!strcmp(name, "enable-blame"))
 173                 ctx.cfg.enable_blame = atoi(value);
 174         else if (!strcmp(name, "enable-commit-graph"))
 175                 ctx.cfg.enable_commit_graph = atoi(value);
 176         else if (!strcmp(name, "enable-log-filecount"))
 177                 ctx.cfg.enable_log_filecount = atoi(value);
 178         else if (!strcmp(name, "enable-log-linecount"))
 179                 ctx.cfg.enable_log_linecount = atoi(value);
 180         else if (!strcmp(name, "enable-remote-branches"))
 181                 ctx.cfg.enable_remote_branches = atoi(value);
 182         else if (!strcmp(name, "enable-subject-links"))
 183                 ctx.cfg.enable_subject_links = atoi(value);
 184         else if (!strcmp(name, "enable-html-serving"))
 185                 ctx.cfg.enable_html_serving = atoi(value);
 186         else if (!strcmp(name, "enable-tree-linenumbers"))
 187                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 188         else if (!strcmp(name, "enable-git-config"))
 189                 ctx.cfg.enable_git_config = atoi(value);
 190         else if (!strcmp(name, "max-stats"))
 191                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 192         else if (!strcmp(name, "cache-size"))
 193                 ctx.cfg.cache_size = atoi(value);
 194         else if (!strcmp(name, "cache-root"))
 195                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 196         else if (!strcmp(name, "cache-root-ttl"))
 197                 ctx.cfg.cache_root_ttl = atoi(value);
 198         else if (!strcmp(name, "cache-repo-ttl"))
 199                 ctx.cfg.cache_repo_ttl = atoi(value);
 200         else if (!strcmp(name, "cache-scanrc-ttl"))
 201                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 202         else if (!strcmp(name, "cache-static-ttl"))
 203                 ctx.cfg.cache_static_ttl = atoi(value);
 204         else if (!strcmp(name, "cache-dynamic-ttl"))
 205                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 206         else if (!strcmp(name, "cache-about-ttl"))
 207                 ctx.cfg.cache_about_ttl = atoi(value);
 208         else if (!strcmp(name, "cache-snapshot-ttl"))
 209                 ctx.cfg.cache_snapshot_ttl = atoi(value);
 210         else if (!strcmp(name, "case-sensitive-sort"))
 211                 ctx.cfg.case_sensitive_sort = atoi(value);
 212         else if (!strcmp(name, "about-filter"))
 213                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 214         else if (!strcmp(name, "commit-filter"))
 215                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 216         else if (!strcmp(name, "email-filter"))
 217                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 218         else if (!strcmp(name, "owner-filter"))
 219                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
 220         else if (!strcmp(name, "auth-filter"))
 221                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 222         else if (!strcmp(name, "embedded"))
 223                 ctx.cfg.embedded = atoi(value);
 224         else if (!strcmp(name, "max-atom-items"))
 225                 ctx.cfg.max_atom_items = atoi(value);
 226         else if (!strcmp(name, "max-message-length"))
 227                 ctx.cfg.max_msg_len = atoi(value);
 228         else if (!strcmp(name, "max-repodesc-length"))
 229                 ctx.cfg.max_repodesc_len = atoi(value);
 230         else if (!strcmp(name, "max-blob-size"))
 231                 ctx.cfg.max_blob_size = atoi(value);
 232         else if (!strcmp(name, "max-repo-count"))
 233                 ctx.cfg.max_repo_count = atoi(value);
 234         else if (!strcmp(name, "max-commit-count"))
 235                 ctx.cfg.max_commit_count = atoi(value);
 236         else if (!strcmp(name, "project-list"))
 237                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 238         else if (!strcmp(name, "scan-path"))
 239                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 240                         process_cached_repolist(expand_macros(value));
 241                 else if (ctx.cfg.project_list)
 242                         scan_projects(expand_macros(value),
 243                                       ctx.cfg.project_list, repo_config);
 244                 else
 245                         scan_tree(expand_macros(value), repo_config);
 246         else if (!strcmp(name, "scan-hidden-path"))
 247                 ctx.cfg.scan_hidden_path = atoi(value);
 248         else if (!strcmp(name, "section-from-path"))
 249                 ctx.cfg.section_from_path = atoi(value);
 250         else if (!strcmp(name, "repository-sort"))
 251                 ctx.cfg.repository_sort = xstrdup(value);
 252         else if (!strcmp(name, "section-sort"))
 253                 ctx.cfg.section_sort = atoi(value);
 254         else if (!strcmp(name, "source-filter"))
 255                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 256         else if (!strcmp(name, "summary-log"))
 257                 ctx.cfg.summary_log = atoi(value);
 258         else if (!strcmp(name, "summary-branches"))
 259                 ctx.cfg.summary_branches = atoi(value);
 260         else if (!strcmp(name, "summary-tags"))
 261                 ctx.cfg.summary_tags = atoi(value);
 262         else if (!strcmp(name, "side-by-side-diffs"))
 263                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 264         else if (!strcmp(name, "agefile"))
 265                 ctx.cfg.agefile = xstrdup(value);
 266         else if (!strcmp(name, "mimetype-file"))
 267                 ctx.cfg.mimetype_file = xstrdup(value);
 268         else if (!strcmp(name, "renamelimit"))
 269                 ctx.cfg.renamelimit = atoi(value);
 270         else if (!strcmp(name, "remove-suffix"))
 271                 ctx.cfg.remove_suffix = atoi(value);
 272         else if (!strcmp(name, "robots"))
 273                 ctx.cfg.robots = xstrdup(value);
 274         else if (!strcmp(name, "clone-prefix"))
 275                 ctx.cfg.clone_prefix = xstrdup(value);
 276         else if (!strcmp(name, "clone-url"))
 277                 ctx.cfg.clone_url = xstrdup(value);
 278         else if (!strcmp(name, "local-time"))
 279                 ctx.cfg.local_time = atoi(value);
 280         else if (!strcmp(name, "commit-sort")) {
 281                 if (!strcmp(value, "date"))
 282                         ctx.cfg.commit_sort = 1;
 283                 if (!strcmp(value, "topo"))
 284                         ctx.cfg.commit_sort = 2;
 285         } else if (!strcmp(name, "branch-sort")) {
 286                 if (!strcmp(value, "age"))
 287                         ctx.cfg.branch_sort = 1;
 288                 if (!strcmp(value, "name"))
 289                         ctx.cfg.branch_sort = 0;
 290         } else if (skip_prefix(name, "mimetype.", &arg))
 291                 add_mimetype(arg, value);
 292         else if (!strcmp(name, "include"))
 293                 parse_configfile(expand_macros(value), config_cb);
 294 }
 295
 296 static void querystring_cb(const char *name, const char *value)
 297 {
 298         if (!value)
 299                 value = "";
 300
 301         if (!strcmp(name,"r")) {
 302                 ctx.qry.repo = xstrdup(value);
 303                 ctx.repo = cgit_get_repoinfo(value);
 304         } else if (!strcmp(name, "p")) {
 305                 ctx.qry.page = xstrdup(value);
 306         } else if (!strcmp(name, "url")) {
 307                 if (*value == '/')
 308                         value++;
 309                 ctx.qry.url = xstrdup(value);
 310                 cgit_parse_url(value);
 311         } else if (!strcmp(name, "qt")) {
 312                 ctx.qry.grep = xstrdup(value);
 313         } else if (!strcmp(name, "q")) {
 314                 ctx.qry.search = xstrdup(value);
 315         } else if (!strcmp(name, "h")) {
 316                 ctx.qry.head = xstrdup(value);
 317                 ctx.qry.has_symref = 1;
 318         } else if (!strcmp(name, "id")) {
 319                 ctx.qry.sha1 = xstrdup(value);
 320                 ctx.qry.has_sha1 = 1;
 321         } else if (!strcmp(name, "id2")) {
 322                 ctx.qry.sha2 = xstrdup(value);
 323                 ctx.qry.has_sha1 = 1;
 324         } else if (!strcmp(name, "ofs")) {
 325                 ctx.qry.ofs = atoi(value);
 326         } else if (!strcmp(name, "path")) {
 327                 ctx.qry.path = trim_end(value, '/');
 328         } else if (!strcmp(name, "name")) {
 329                 ctx.qry.name = xstrdup(value);
 330         } else if (!strcmp(name, "s")) {
 331                 ctx.qry.sort = xstrdup(value);
 332         } else if (!strcmp(name, "showmsg")) {
 333                 ctx.qry.showmsg = atoi(value);
 334         } else if (!strcmp(name, "period")) {
 335                 ctx.qry.period = xstrdup(value);
 336         } else if (!strcmp(name, "dt")) {
 337                 ctx.qry.difftype = atoi(value);
 338                 ctx.qry.has_difftype = 1;
 339         } else if (!strcmp(name, "ss")) {
 340                 /* No longer generated, but there may be links out there. */
 341                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 342                 ctx.qry.has_difftype = 1;
 343         } else if (!strcmp(name, "all")) {
 344                 ctx.qry.show_all = atoi(value);
 345         } else if (!strcmp(name, "context")) {
 346                 ctx.qry.context = atoi(value);
 347         } else if (!strcmp(name, "ignorews")) {
 348                 ctx.qry.ignorews = atoi(value);
 349         } else if (!strcmp(name, "follow")) {
 350                 ctx.qry.follow = atoi(value);
 351         }
 352 }
 353
 354 static void prepare_context(void)
 355 {
 356         memset(&ctx, 0, sizeof(ctx));
 357         ctx.cfg.agefile = "info/web/last-modified";
 358         ctx.cfg.nocache = 0;
 359         ctx.cfg.cache_size = 0;
 360         ctx.cfg.cache_max_create_time = 5;
 361         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
 362         ctx.cfg.cache_about_ttl = 15;
 363         ctx.cfg.cache_snapshot_ttl = 5;
 364         ctx.cfg.cache_repo_ttl = 5;
 365         ctx.cfg.cache_root_ttl = 5;
 366         ctx.cfg.cache_scanrc_ttl = 15;
 367         ctx.cfg.cache_dynamic_ttl = 5;
 368         ctx.cfg.cache_static_ttl = -1;
 369         ctx.cfg.case_sensitive_sort = 1;
 370         ctx.cfg.branch_sort = 0;
 371         ctx.cfg.commit_sort = 0;
 372         ctx.cfg.css = "/cgit.css";
 373         ctx.cfg.logo = "/cgit.png";
 374         ctx.cfg.favicon = "/favicon.ico";
 375         ctx.cfg.local_time = 0;
 376         ctx.cfg.enable_http_clone = 1;
 377         ctx.cfg.enable_index_owner = 1;
 378         ctx.cfg.enable_tree_linenumbers = 1;
 379         ctx.cfg.enable_git_config = 0;
 380         ctx.cfg.max_repo_count = 50;
 381         ctx.cfg.max_commit_count = 50;
 382         ctx.cfg.max_lock_attempts = 5;
 383         ctx.cfg.max_msg_len = 80;
 384         ctx.cfg.max_repodesc_len = 80;
 385         ctx.cfg.max_blob_size = 0;
 386         ctx.cfg.max_stats = 0;
 387         ctx.cfg.project_list = NULL;
 388         ctx.cfg.renamelimit = -1;
 389         ctx.cfg.remove_suffix = 0;
 390         ctx.cfg.robots = "index, nofollow";
 391         ctx.cfg.root_title = "Git repository browser";
 392         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 393         ctx.cfg.scan_hidden_path = 0;
 394         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
 395         ctx.cfg.section = "";
 396         ctx.cfg.repository_sort = "name";
 397         ctx.cfg.section_sort = 1;
 398         ctx.cfg.summary_branches = 10;
 399         ctx.cfg.summary_log = 10;
 400         ctx.cfg.summary_tags = 10;
 401         ctx.cfg.max_atom_items = 10;
 402         ctx.cfg.difftype = DIFF_UNIFIED;
 403         ctx.env.cgit_config = getenv("CGIT_CONFIG");
 404         ctx.env.http_host = getenv("HTTP_HOST");
 405         ctx.env.https = getenv("HTTPS");
 406         ctx.env.no_http = getenv("NO_HTTP");
 407         ctx.env.path_info = getenv("PATH_INFO");
 408         ctx.env.query_string = getenv("QUERY_STRING");
 409         ctx.env.request_method = getenv("REQUEST_METHOD");
 410         ctx.env.script_name = getenv("SCRIPT_NAME");
 411         ctx.env.server_name = getenv("SERVER_NAME");
 412         ctx.env.server_port = getenv("SERVER_PORT");
 413         ctx.env.http_cookie = getenv("HTTP_COOKIE");
 414         ctx.env.http_referer = getenv("HTTP_REFERER");
 415         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
 416         ctx.env.authenticated = 0;
 417         ctx.page.mimetype = "text/html";
 418         ctx.page.charset = PAGE_ENCODING;
 419         ctx.page.filename = NULL;
 420         ctx.page.size = 0;
 421         ctx.page.modified = time(NULL);
 422         ctx.page.expires = ctx.page.modified;
 423         ctx.page.etag = NULL;
 424         memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
 425         if (ctx.env.script_name)
 426                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
 427         if (ctx.env.query_string)
 428                 ctx.qry.raw = xstrdup(ctx.env.query_string);
 429         if (!ctx.env.cgit_config)
 430                 ctx.env.cgit_config = CGIT_CONFIG;
 431 }
 432
 433 struct refmatch {
 434         char *req_ref;
 435         char *first_ref;
 436         int match;
 437 };
 438
 439 static int find_current_ref(const char *refname, const struct object_id *oid,
 440                             int flags, void *cb_data)
 441 {
 442         struct refmatch *info;
 443
 444         info = (struct refmatch *)cb_data;
 445         if (!strcmp(refname, info->req_ref))
 446                 info->match = 1;
 447         if (!info->first_ref)
 448                 info->first_ref = xstrdup(refname);
 449         return info->match;
 450 }
 451
 452 static void free_refmatch_inner(struct refmatch *info)
 453 {
 454         if (info->first_ref)
 455                 free(info->first_ref);
 456 }
 457
 458 static char *find_default_branch(struct cgit_repo *repo)
 459 {
 460         struct refmatch info;
 461         char *ref;
 462
 463         info.req_ref = repo->defbranch;
 464         info.first_ref = NULL;
 465         info.match = 0;
 466         for_each_branch_ref(find_current_ref, &info);
 467         if (info.match)
 468                 ref = info.req_ref;
 469         else
 470                 ref = info.first_ref;
 471         if (ref)
 472                 ref = xstrdup(ref);
 473         free_refmatch_inner(&info);
 474
 475         return ref;
 476 }
 477
 478 static char *guess_defbranch(void)
 479 {
 480         const char *ref, *refname;
 481         struct object_id oid;
 482
 483         ref = resolve_ref_unsafe("HEAD", 0, &oid, NULL);
 484         if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
 485                 return "master";
 486         return xstrdup(refname);
 487 }
 488
 489 /* The caller must free filename and ref after calling this. */
 490 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 491 {
 492         const char *colon;
 493
 494         *filename = NULL;
 495         *ref = NULL;
 496
 497         if (!readme || !readme[0])
 498                 return;
 499
 500         /* Check if the readme is tracked in the git repo. */
 501         colon = strchr(readme, ':');
 502         if (colon && strlen(colon) > 1) {
 503                 /* If it starts with a colon, we want to use
 504                  * the default branch */
 505                 if (colon == readme && repo->defbranch)
 506                         *ref = xstrdup(repo->defbranch);
 507                 else
 508                         *ref = xstrndup(readme, colon - readme);
 509                 readme = colon + 1;
 510         }
 511
 512         /* Prepend repo path to relative readme path unless tracked. */
 513         if (!(*ref) && readme[0] != '/')
 514                 *filename = fmtalloc("%s/%s", repo->path, readme);
 515         else
 516                 *filename = xstrdup(readme);
 517 }
 518 static void choose_readme(struct cgit_repo *repo)
 519 {
 520         int found;
 521         char *filename, *ref;
 522         struct string_list_item *entry;
 523
 524         if (!repo->readme.nr)
 525                 return;
 526
 527         found = 0;
 528         for_each_string_list_item(entry, &repo->readme) {
 529                 parse_readme(entry->string, &filename, &ref, repo);
 530                 if (!filename) {
 531                         free(filename);
 532                         free(ref);
 533                         continue;
 534                 }
 535                 if (ref) {
 536                         if (cgit_ref_path_exists(filename, ref, 1)) {
 537                                 found = 1;
 538                                 break;
 539                         }
 540                 }
 541                 else if (!access(filename, R_OK)) {
 542                         found = 1;
 543                         break;
 544                 }
 545                 free(filename);
 546                 free(ref);
 547         }
 548         repo->readme.strdup_strings = 1;
 549         string_list_clear(&repo->readme, 0);
 550         repo->readme.strdup_strings = 0;
 551         if (found)
 552                 string_list_append(&repo->readme, filename)->util = ref;
 553 }
 554
 555 static void print_no_repo_clone_urls(const char *url)
 556 {
 557         html("<tr><td><a rel='vcs-git' href='");
 558         html_url_path(url);
 559         html("' title='");
 560         html_attr(ctx.repo->name);
 561         html(" Git repository'>");
 562         html_txt(url);
 563         html("</a></td></tr>\n");
 564 }
 565
 566 static void prepare_repo_env(int *nongit)
 567 {
 568         /* The path to the git repository. */
 569         setenv("GIT_DIR", ctx.repo->path, 1);
 570
 571         /* Do not look in /etc/ for gitconfig and gitattributes. */
 572         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
 573         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
 574         unsetenv("HOME");
 575         unsetenv("XDG_CONFIG_HOME");
 576
 577         /* Setup the git directory and initialize the notes system. Both of these
 578          * load local configuration from the git repository, so we do them both while
 579          * the HOME variables are unset. */
 580         setup_git_directory_gently(nongit);
 581         init_display_notes(NULL);
 582 }
 583 static int prepare_repo_cmd(int nongit)
 584 {
 585         struct object_id oid;
 586         int rc;
 587
 588         if (nongit) {
 589                 const char *name = ctx.repo->name;
 590                 rc = errno;
 591                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 592                                                 "config error");
 593                 ctx.repo = NULL;
 594                 cgit_print_http_headers();
 595                 cgit_print_docstart();
 596                 cgit_print_pageheader();
 597                 cgit_print_error("Failed to open %s: %s", name,
 598                                  rc ? strerror(rc) : "Not a valid git repository");
 599                 cgit_print_docend();
 600                 return 1;
 601         }
 602         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 603
 604         if (!ctx.repo->defbranch)
 605                 ctx.repo->defbranch = guess_defbranch();
 606
 607         if (!ctx.qry.head) {
 608                 ctx.qry.nohead = 1;
 609                 ctx.qry.head = find_default_branch(ctx.repo);
 610         }
 611
 612         if (!ctx.qry.head) {
 613                 cgit_print_http_headers();
 614                 cgit_print_docstart();
 615                 cgit_print_pageheader();
 616                 cgit_print_error("Repository seems to be empty");
 617                 if (!strcmp(ctx.qry.page, "summary")) {
 618                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
 619                         cgit_prepare_repo_env(ctx.repo);
 620                         cgit_add_clone_urls(print_no_repo_clone_urls);
 621                         html("</table>\n");
 622                 }
 623                 cgit_print_docend();
 624                 return 1;
 625         }
 626
 627         if (get_oid(ctx.qry.head, &oid)) {
 628                 char *old_head = ctx.qry.head;
 629                 ctx.qry.head = xstrdup(ctx.repo->defbranch);
 630                 cgit_print_error_page(404, "Not found",
 631                                 "Invalid branch: %s", old_head);
 632                 free(old_head);
 633                 return 1;
 634         }
 635         string_list_sort(&ctx.repo->submodules);
 636         cgit_prepare_repo_env(ctx.repo);
 637         choose_readme(ctx.repo);
 638         return 0;
 639 }
 640
 641 static inline void open_auth_filter(const char *function)
 642 {
 643         cgit_open_filter(ctx.cfg.auth_filter, function,
 644                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
 645                 ctx.env.request_method ? ctx.env.request_method : "",
 646                 ctx.env.query_string ? ctx.env.query_string : "",
 647                 ctx.env.http_referer ? ctx.env.http_referer : "",
 648                 ctx.env.path_info ? ctx.env.path_info : "",
 649                 ctx.env.http_host ? ctx.env.http_host : "",
 650                 ctx.env.https ? ctx.env.https : "",
 651                 ctx.qry.repo ? ctx.qry.repo : "",
 652                 ctx.qry.page ? ctx.qry.page : "",
 653                 ctx.qry.url ? ctx.qry.url : "",
 654                 cgit_loginurl());
 655 }
 656
 657 /* We intentionally keep this rather small, instead of looping and
 658  * feeding it to the filter a couple bytes at a time. This way, the
 659  * filter itself does not need to handle any denial of service or
 660  * buffer bloat issues. If this winds up being too small, people
 661  * will complain on the mailing list, and we'll increase it as needed. */
 662 #define MAX_AUTHENTICATION_POST_BYTES 4096
 663 /* The filter is expected to spit out "Status: " and all headers. */
 664 static inline void authenticate_post(void)
 665 {
 666         char buffer[MAX_AUTHENTICATION_POST_BYTES];
 667         unsigned int len;
 668
 669         open_auth_filter("authenticate-post");
 670         len = ctx.env.content_length;
 671         if (len > MAX_AUTHENTICATION_POST_BYTES)
 672                 len = MAX_AUTHENTICATION_POST_BYTES;
 673         if (read(STDIN_FILENO, buffer, len) < 0)
 674                 die_errno("Could not read POST from stdin");
 675         if (write(STDOUT_FILENO, buffer, len) < 0)
 676                 die_errno("Could not write POST to stdout");
 677         cgit_close_filter(ctx.cfg.auth_filter);
 678         exit(0);
 679 }
 680
 681 static inline void authenticate_cookie(void)
 682 {
 683         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
 684         if (!ctx.cfg.auth_filter) {
 685                 ctx.env.authenticated = 1;
 686                 return;
 687         }
 688
 689         /* If we're having something POST'd to /login, we're authenticating POST,
 690          * instead of the cookie, so call authenticate_post and bail out early.
 691          * This pattern here should match /?p=login with POST. */
 692         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
 693             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
 694                 authenticate_post();
 695                 return;
 696         }
 697
 698         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
 699         open_auth_filter("authenticate-cookie");
 700         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
 701 }
 702
 703 static void process_request(void)
 704 {
 705         struct cgit_cmd *cmd;
 706         int nongit = 0;
 707
 708         /* If we're not yet authenticated, no matter what page we're on,
 709          * display the authentication body from the auth_filter. This should
 710          * never be cached. */
 711         if (!ctx.env.authenticated) {
 712                 ctx.page.title = "Authentication Required";
 713                 cgit_print_http_headers();
 714                 cgit_print_docstart();
 715                 cgit_print_pageheader();
 716                 open_auth_filter("body");
 717                 cgit_close_filter(ctx.cfg.auth_filter);
 718                 cgit_print_docend();
 719                 return;
 720         }
 721
 722         if (ctx.repo)
 723                 prepare_repo_env(&nongit);
 724
 725         cmd = cgit_get_cmd();
 726         if (!cmd) {
 727                 ctx.page.title = "cgit error";
 728                 cgit_print_error_page(404, "Not found", "Invalid request");
 729                 return;
 730         }
 731
 732         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
 733                 ctx.page.title = "cgit error";
 734                 cgit_print_error_page(404, "Not found", "Invalid request");
 735                 return;
 736         }
 737
 738         if (cmd->want_repo && !ctx.repo) {
 739                 cgit_print_error_page(400, "Bad request",
 740                                 "No repository selected");
 741                 return;
 742         }
 743
 744         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
 745          * in-project path limit to be made available at ctx.qry.vpath.
 746          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
 747          */
 748         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 749
 750         if (ctx.repo && prepare_repo_cmd(nongit))
 751                 return;
 752
 753         cmd->fn();
 754 }
 755
 756 static int cmp_repos(const void *a, const void *b)
 757 {
 758         const struct cgit_repo *ra = a, *rb = b;
 759         return strcmp(ra->url, rb->url);
 760 }
 761
 762 static char *build_snapshot_setting(int bitmap)
 763 {
 764         const struct cgit_snapshot_format *f;
 765         struct strbuf result = STRBUF_INIT;
 766
 767         for (f = cgit_snapshot_formats; f->suffix; f++) {
 768                 if (f->bit & bitmap) {
 769                         if (result.len)
 770                                 strbuf_addch(&result, ' ');
 771                         strbuf_addstr(&result, f->suffix);
 772                 }
 773         }
 774         return strbuf_detach(&result, NULL);
 775 }
 776
 777 static char *get_first_line(char *txt)
 778 {
 779         char *t = xstrdup(txt);
 780         char *p = strchr(t, '\n');
 781         if (p)
 782                 *p = '\0';
 783         return t;
 784 }
 785
 786 static void print_repo(FILE *f, struct cgit_repo *repo)
 787 {
 788         struct string_list_item *item;
 789         fprintf(f, "repo.url=%s\n", repo->url);
 790         fprintf(f, "repo.name=%s\n", repo->name);
 791         fprintf(f, "repo.path=%s\n", repo->path);
 792         if (repo->owner)
 793                 fprintf(f, "repo.owner=%s\n", repo->owner);
 794         if (repo->desc) {
 795                 char *tmp = get_first_line(repo->desc);
 796                 fprintf(f, "repo.desc=%s\n", tmp);
 797                 free(tmp);
 798         }
 799         for_each_string_list_item(item, &repo->readme) {
 800                 if (item->util)
 801                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 802                 else
 803                         fprintf(f, "repo.readme=%s\n", item->string);
 804         }
 805         if (repo->defbranch)
 806                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 807         if (repo->module_link)
 808                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 809         if (repo->section)
 810                 fprintf(f, "repo.section=%s\n", repo->section);
 811         if (repo->homepage)
 812                 fprintf(f, "repo.homepage=%s\n", repo->homepage);
 813         if (repo->clone_url)
 814                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 815         fprintf(f, "repo.enable-commit-graph=%d\n",
 816                 repo->enable_commit_graph);
 817         fprintf(f, "repo.enable-log-filecount=%d\n",
 818                 repo->enable_log_filecount);
 819         fprintf(f, "repo.enable-log-linecount=%d\n",
 820                 repo->enable_log_linecount);
 821         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 822                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 823         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 824                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 825         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 826                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 827         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 828                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 829         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
 830                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 831         if (repo->snapshots != ctx.cfg.snapshots) {
 832                 char *tmp = build_snapshot_setting(repo->snapshots);
 833                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 834                 free(tmp);
 835         }
 836         if (repo->max_stats != ctx.cfg.max_stats)
 837                 fprintf(f, "repo.max-stats=%s\n",
 838                         cgit_find_stats_periodname(repo->max_stats));
 839         if (repo->logo)
 840                 fprintf(f, "repo.logo=%s\n", repo->logo);
 841         if (repo->logo_link)
 842                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 843         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 844         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 845         fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
 846         if (repo->branch_sort == 1)
 847                 fprintf(f, "repo.branch-sort=age\n");
 848         if (repo->commit_sort) {
 849                 if (repo->commit_sort == 1)
 850                         fprintf(f, "repo.commit-sort=date\n");
 851                 else if (repo->commit_sort == 2)
 852                         fprintf(f, "repo.commit-sort=topo\n");
 853         }
 854         fprintf(f, "repo.hide=%d\n", repo->hide);
 855         fprintf(f, "repo.ignore=%d\n", repo->ignore);
 856         fprintf(f, "\n");
 857 }
 858
 859 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 860 {
 861         int i;
 862
 863         for (i = start; i < list->count; i++)
 864                 print_repo(f, &list->repos[i]);
 865 }
 866
 867 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 868  * and return 0 on success.
 869  */
 870 static int generate_cached_repolist(const char *path, const char *cached_rc)
 871 {
 872         struct strbuf locked_rc = STRBUF_INIT;
 873         int result = 0;
 874         int idx;
 875         FILE *f;
 876
 877         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 878         f = fopen(locked_rc.buf, "wx");
 879         if (!f) {
 880                 /* Inform about the error unless the lockfile already existed,
 881                  * since that only means we've got concurrent requests.
 882                  */
 883                 result = errno;
 884                 if (result != EEXIST)
 885                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 886                                 locked_rc.buf, strerror(result), result);
 887                 goto out;
 888         }
 889         idx = cgit_repolist.count;
 890         if (ctx.cfg.project_list)
 891                 scan_projects(path, ctx.cfg.project_list, repo_config);
 892         else
 893                 scan_tree(path, repo_config);
 894         print_repolist(f, &cgit_repolist, idx);
 895         if (rename(locked_rc.buf, cached_rc))
 896                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 897                         locked_rc.buf, cached_rc, strerror(errno), errno);
 898         fclose(f);
 899 out:
 900         strbuf_release(&locked_rc);
 901         return result;
 902 }
 903
 904 static void process_cached_repolist(const char *path)
 905 {
 906         struct stat st;
 907         struct strbuf cached_rc = STRBUF_INIT;
 908         time_t age;
 909         unsigned long hash;
 910
 911         hash = hash_str(path);
 912         if (ctx.cfg.project_list)
 913                 hash += hash_str(ctx.cfg.project_list);
 914         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 915
 916         if (stat(cached_rc.buf, &st)) {
 917                 /* Nothing is cached, we need to scan without forking. And
 918                  * if we fail to generate a cached repolist, we need to
 919                  * invoke scan_tree manually.
 920                  */
 921                 if (generate_cached_repolist(path, cached_rc.buf)) {
 922                         if (ctx.cfg.project_list)
 923                                 scan_projects(path, ctx.cfg.project_list,
 924                                               repo_config);
 925                         else
 926                                 scan_tree(path, repo_config);
 927                 }
 928                 goto out;
 929         }
 930
 931         parse_configfile(cached_rc.buf, config_cb);
 932
 933         /* If the cached configfile hasn't expired, lets exit now */
 934         age = time(NULL) - st.st_mtime;
 935         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 936                 goto out;
 937
 938         /* The cached repolist has been parsed, but it was old. So lets
 939          * rescan the specified path and generate a new cached repolist
 940          * in a child-process to avoid latency for the current request.
 941          */
 942         if (fork())
 943                 goto out;
 944
 945         exit(generate_cached_repolist(path, cached_rc.buf));
 946 out:
 947         strbuf_release(&cached_rc);
 948 }
 949
 950 static void cgit_parse_args(int argc, const char **argv)
 951 {
 952         int i;
 953         const char *arg;
 954         int scan = 0;
 955
 956         for (i = 1; i < argc; i++) {
 957                 if (!strcmp(argv[i], "--version")) {
 958                         printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
 959 #ifdef NO_LUA
 960                         printf("[-] ");
 961 #else
 962                         printf("[+] ");
 963 #endif
 964                         printf("Lua scripting\n");
 965 #ifndef HAVE_LINUX_SENDFILE
 966                         printf("[-] ");
 967 #else
 968                         printf("[+] ");
 969 #endif
 970                         printf("Linux sendfile() usage\n");
 971
 972                         exit(0);
 973                 }
 974                 if (skip_prefix(argv[i], "--cache=", &arg)) {
 975                         ctx.cfg.cache_root = xstrdup(arg);
 976                 } else if (!strcmp(argv[i], "--nocache")) {
 977                         ctx.cfg.nocache = 1;
 978                 } else if (!strcmp(argv[i], "--nohttp")) {
 979                         ctx.env.no_http = "1";
 980                 } else if (skip_prefix(argv[i], "--query=", &arg)) {
 981                         ctx.qry.raw = xstrdup(arg);
 982                 } else if (skip_prefix(argv[i], "--repo=", &arg)) {
 983                         ctx.qry.repo = xstrdup(arg);
 984                 } else if (skip_prefix(argv[i], "--page=", &arg)) {
 985                         ctx.qry.page = xstrdup(arg);
 986                 } else if (skip_prefix(argv[i], "--head=", &arg)) {
 987                         ctx.qry.head = xstrdup(arg);
 988                         ctx.qry.has_symref = 1;
 989                 } else if (skip_prefix(argv[i], "--sha1=", &arg)) {
 990                         ctx.qry.sha1 = xstrdup(arg);
 991                         ctx.qry.has_sha1 = 1;
 992                 } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
 993                         ctx.qry.ofs = atoi(arg);
 994                 } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
 995                            skip_prefix(argv[i], "--scan-path=", &arg)) {
 996                         /*
 997                          * HACK: The global snapshot bit mask defines the set
 998                          * of allowed snapshot formats, but the config file
 999                          * hasn't been parsed yet so the mask is currently 0.
1000                          * By setting all bits high before scanning we make
1001                          * sure that any in-repo cgitrc snapshot setting is
1002                          * respected by scan_tree().
1003                          *
1004                          * NOTE: We assume that there aren't more than 8
1005                          * different snapshot formats supported by cgit...
1006                          */
1007                         ctx.cfg.snapshots = 0xFF;
1008                         scan++;
1009                         scan_tree(arg, repo_config);
1010                 }
1011         }
1012         if (scan) {
1013                 qsort(cgit_repolist.repos, cgit_repolist.count,
1014                         sizeof(struct cgit_repo), cmp_repos);
1015                 print_repolist(stdout, &cgit_repolist, 0);
1016                 exit(0);
1017         }
1018 }
1019
1020 static int calc_ttl(void)
1021 {
1022         if (!ctx.repo)
1023                 return ctx.cfg.cache_root_ttl;
1024
1025         if (!ctx.qry.page)
1026                 return ctx.cfg.cache_repo_ttl;
1027
1028         if (!strcmp(ctx.qry.page, "about"))
1029                 return ctx.cfg.cache_about_ttl;
1030
1031         if (!strcmp(ctx.qry.page, "snapshot"))
1032                 return ctx.cfg.cache_snapshot_ttl;
1033
1034         if (ctx.qry.has_sha1)
1035                 return ctx.cfg.cache_static_ttl;
1036
1037         if (ctx.qry.has_symref)
1038                 return ctx.cfg.cache_dynamic_ttl;
1039
1040         return ctx.cfg.cache_repo_ttl;
1041 }
1042
1043 int cmd_main(int argc, const char **argv)
1044 {
1045         const char *path;
1046         int err, ttl;
1047
1048         cgit_init_filters();
1049         atexit(cgit_cleanup_filters);
1050
1051         prepare_context();
1052         cgit_repolist.length = 0;
1053         cgit_repolist.count = 0;
1054         cgit_repolist.repos = NULL;
1055
1056         cgit_parse_args(argc, argv);
1057         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1058         ctx.repo = NULL;
1059         http_parse_querystring(ctx.qry.raw, querystring_cb);
1060
1061         /* If virtual-root isn't specified in cgitrc, lets pretend
1062          * that virtual-root equals SCRIPT_NAME, minus any possibly
1063          * trailing slashes.
1064          */
1065         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1066                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1067
1068         /* If no url parameter is specified on the querystring, lets
1069          * use PATH_INFO as url. This allows cgit to work with virtual
1070          * urls without the need for rewriterules in the webserver (as
1071          * long as PATH_INFO is included in the cache lookup key).
1072          */
1073         path = ctx.env.path_info;
1074         if (!ctx.qry.url && path) {
1075                 if (path[0] == '/')
1076                         path++;
1077                 ctx.qry.url = xstrdup(path);
1078                 if (ctx.qry.raw) {
1079                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1080                         free(ctx.qry.raw);
1081                         ctx.qry.raw = newqry;
1082                 } else
1083                         ctx.qry.raw = xstrdup(ctx.qry.url);
1084                 cgit_parse_url(ctx.qry.url);
1085         }
1086
1087         /* Before we go any further, we set ctx.env.authenticated by checking to see
1088          * if the supplied cookie is valid. All cookies are valid if there is no
1089          * auth_filter. If there is an auth_filter, the filter decides. */
1090         authenticate_cookie();
1091
1092         ttl = calc_ttl();
1093         if (ttl < 0)
1094                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1095         else
1096                 ctx.page.expires += ttl * 60;
1097         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1098                 ctx.cfg.nocache = 1;
1099         if (ctx.cfg.nocache)
1100                 ctx.cfg.cache_size = 0;
1101         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1102                             ctx.qry.raw, ttl, process_request);
1103         cgit_cleanup_filters();
1104         if (err)
1105                 cgit_print_error("Error processing page: %s (%d)",
1106                                  strerror(err), err);
1107         return err;
1108 }