/* cgit.c: cgi for the git scm
*
* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "cache.h"
#include "cmd.h"
#include "configfile.h"
#include "html.h"
#include "ui-shared.h"
#include "ui-stats.h"
#include "ui-blob.h"
#include "ui-summary.h"
#include "scan-tree.h"
const char *cgit_version = CGIT_VERSION;
static void add_mimetype(const char *name, const char *value)
{
struct string_list_item *item;
item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
item->util = xstrdup(value);
}
static void process_cached_repolist(const char *path);
static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
{
struct string_list_item *item;
if (!strcmp(name, "name"))
repo->name = xstrdup(value);
else if (!strcmp(name, "clone-url"))
repo->clone_url = xstrdup(value);
else if (!strcmp(name, "desc"))
repo->desc = xstrdup(value);
else if (!strcmp(name, "owner"))
repo->owner = xstrdup(value);
else if (!strcmp(name, "defbranch"))
repo->defbranch = xstrdup(value);
else if (!strcmp(name, "snapshots"))
repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
else if (!strcmp(name, "enable-commit-graph"))
repo->enable_commit_graph = atoi(value);
else if (!strcmp(name, "enable-log-filecount"))
repo->enable_log_filecount = atoi(value);
else if (!strcmp(name, "enable-log-linecount"))
repo->enable_log_linecount = atoi(value);
else if (!strcmp(name, "enable-remote-branches"))
repo->enable_remote_branches = atoi(value);
else if (!strcmp(name, "enable-subject-links"))
repo->enable_subject_links = atoi(value);
else if (!strcmp(name, "branch-sort")) {
if (!strcmp(value, "age"))
repo->branch_sort = 1;
if (!strcmp(value, "name"))
repo->branch_sort = 0;
} else if (!strcmp(name, "commit-sort")) {
if (!strcmp(value, "date"))
repo->commit_sort = 1;
if (!strcmp(value, "topo"))
repo->commit_sort = 2;
} else if (!strcmp(name, "max-stats"))
repo->max_stats = cgit_find_stats_period(value, NULL);
else if (!strcmp(name, "module-link"))
repo->module_link= xstrdup(value);
else if (!prefixcmp(name, "module-link.")) {
item = string_list_append(&repo->submodules, xstrdup(name + 12));
item->util = xstrdup(value);
} else if (!strcmp(name, "section"))
repo->section = xstrdup(value);
else if (!strcmp(name, "readme") && value != NULL) {
if (repo->readme.items == ctx.cfg.readme.items)
memset(&repo->readme, 0, sizeof(repo->readme));
string_list_append(&repo->readme, xstrdup(value));
} else if (!strcmp(name, "logo") && value != NULL)
repo->logo = xstrdup(value);
else if (!strcmp(name, "logo-link") && value != NULL)
repo->logo_link = xstrdup(value);
else if (ctx.cfg.enable_filter_overrides) {
if (!strcmp(name, "about-filter"))
repo->about_filter = cgit_new_filter(value, ABOUT);
else if (!strcmp(name, "commit-filter"))
repo->commit_filter = cgit_new_filter(value, COMMIT);
else if (!strcmp(name, "source-filter"))
repo->source_filter = cgit_new_filter(value, SOURCE);
else if (!strcmp(name, "email-filter"))
repo->email_filter = cgit_new_filter(value, EMAIL);
}
}
static void config_cb(const char *name, const char *value)
{
if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
ctx.cfg.section = xstrdup(value);
else if (!strcmp(name, "repo.url"))
ctx.repo = cgit_add_repo(value);
else if (ctx.repo && !strcmp(name, "repo.path"))
ctx.repo->path = trim_end(value, '/');
else if (ctx.repo && !prefixcmp(name, "repo."))
repo_config(ctx.repo, name + 5, value);
else if (!strcmp(name, "readme") && value != NULL)
string_list_append(&ctx.cfg.readme, xstrdup(value));
else if (!strcmp(name, "root-title"))
ctx.cfg.root_title = xstrdup(value);
else if (!strcmp(name, "root-desc"))
ctx.cfg.root_desc = xstrdup(value);
else if (!strcmp(name, "root-readme"))
ctx.cfg.root_readme = xstrdup(value);
else if (!strcmp(name, "css"))
ctx.cfg.css = xstrdup(value);
else if (!strcmp(name, "favicon"))
ctx.cfg.favicon = xstrdup(value);
else if (!strcmp(name, "footer"))
ctx.cfg.footer = xstrdup(value);
else if (!strcmp(name, "head-include"))
ctx.cfg.head_include = xstrdup(value);
else if (!strcmp(name, "header"))
ctx.cfg.header = xstrdup(value);
else if (!strcmp(name, "logo"))
ctx.cfg.logo = xstrdup(value);
else if (!strcmp(name, "index-header"))
ctx.cfg.index_header = xstrdup(value);
else if (!strcmp(name, "index-info"))
ctx.cfg.index_info = xstrdup(value);
else if (!strcmp(name, "logo-link"))
ctx.cfg.logo_link = xstrdup(value);
else if (!strcmp(name, "module-link"))
ctx.cfg.module_link = xstrdup(value);
else if (!strcmp(name, "strict-export"))
ctx.cfg.strict_export = xstrdup(value);
else if (!strcmp(name, "virtual-root")) {
ctx.cfg.virtual_root = ensure_end(value, '/');
} else if (!strcmp(name, "nocache"))
ctx.cfg.nocache = atoi(value);
else if (!strcmp(name, "noplainemail"))
ctx.cfg.noplainemail = atoi(value);
else if (!strcmp(name, "noheader"))
ctx.cfg.noheader = atoi(value);
else if (!strcmp(name, "snapshots"))
ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
else if (!strcmp(name, "enable-filter-overrides"))
ctx.cfg.enable_filter_overrides = atoi(value);
else if (!strcmp(name, "enable-http-clone"))
ctx.cfg.enable_http_clone = atoi(value);
else if (!strcmp(name, "enable-index-links"))
ctx.cfg.enable_index_links = atoi(value);
else if (!strcmp(name, "enable-index-owner"))
ctx.cfg.enable_index_owner = atoi(value);
else if (!strcmp(name, "enable-commit-graph"))
ctx.cfg.enable_commit_graph = atoi(value);
else if (!strcmp(name, "enable-log-filecount"))
ctx.cfg.enable_log_filecount = atoi(value);
else if (!strcmp(name, "enable-log-linecount"))
ctx.cfg.enable_log_linecount = atoi(value);
else if (!strcmp(name, "enable-remote-branches"))
ctx.cfg.enable_remote_branches = atoi(value);
else if (!strcmp(name, "enable-subject-links"))
ctx.cfg.enable_subject_links = atoi(value);
else if (!strcmp(name, "enable-tree-linenumbers"))
ctx.cfg.enable_tree_linenumbers = atoi(value);
else if (!strcmp(name, "enable-git-config"))
ctx.cfg.enable_git_config = atoi(value);
else if (!strcmp(name, "max-stats"))
ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
else if (!strcmp(name, "cache-size"))
ctx.cfg.cache_size = atoi(value);
else if (!strcmp(name, "cache-root"))
ctx.cfg.cache_root = xstrdup(expand_macros(value));
else if (!strcmp(name, "cache-root-ttl"))
ctx.cfg.cache_root_ttl = atoi(value);
else if (!strcmp(name, "cache-repo-ttl"))
ctx.cfg.cache_repo_ttl = atoi(value);
else if (!strcmp(name, "cache-scanrc-ttl"))
ctx.cfg.cache_scanrc_ttl = atoi(value);
else if (!strcmp(name, "cache-static-ttl"))
ctx.cfg.cache_static_ttl = atoi(value);
else if (!strcmp(name, "cache-dynamic-ttl"))
ctx.cfg.cache_dynamic_ttl = atoi(value);
else if (!strcmp(name, "cache-about-ttl"))
ctx.cfg.cache_about_ttl = atoi(value);
else if (!strcmp(name, "cache-snapshot-ttl"))
ctx.cfg.cache_snapshot_ttl = atoi(value);
else if (!strcmp(name, "case-sensitive-sort"))
ctx.cfg.case_sensitive_sort = atoi(value);
else if (!strcmp(name, "about-filter"))
ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
else if (!strcmp(name, "commit-filter"))
ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
else if (!strcmp(name, "email-filter"))
ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
else if (!strcmp(name, "auth-filter"))
ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
else if (!strcmp(name, "embedded"))
ctx.cfg.embedded = atoi(value);
else if (!strcmp(name, "max-atom-items"))
ctx.cfg.max_atom_items = atoi(value);
else if (!strcmp(name, "max-message-length"))
ctx.cfg.max_msg_len = atoi(value);
else if (!strcmp(name, "max-repodesc-length"))
ctx.cfg.max_repodesc_len = atoi(value);
else if (!strcmp(name, "max-blob-size"))
ctx.cfg.max_blob_size = atoi(value);
else if (!strcmp(name, "max-repo-count"))
ctx.cfg.max_repo_count = atoi(value);
else if (!strcmp(name, "max-commit-count"))
ctx.cfg.max_commit_count = atoi(value);
else if (!strcmp(name, "project-list"))
ctx.cfg.project_list = xstrdup(expand_macros(value));
else if (!strcmp(name, "scan-path"))
if (!ctx.cfg.nocache && ctx.cfg.cache_size)
process_cached_repolist(expand_macros(value));
else if (ctx.cfg.project_list)
scan_projects(expand_macros(value),
ctx.cfg.project_list, repo_config);
else
scan_tree(expand_macros(value), repo_config);
else if (!strcmp(name, "scan-hidden-path"))
ctx.cfg.scan_hidden_path = atoi(value);
else if (!strcmp(name, "section-from-path"))
ctx.cfg.section_from_path = atoi(value);
else if (!strcmp(name, "repository-sort"))
ctx.cfg.repository_sort = xstrdup(value);
else if (!strcmp(name, "section-sort"))
ctx.cfg.section_sort = atoi(value);
else if (!strcmp(name, "source-filter"))
ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
else if (!strcmp(name, "summary-log"))
ctx.cfg.summary_log = atoi(value);
else if (!strcmp(name, "summary-branches"))
ctx.cfg.summary_branches = atoi(value);
else if (!strcmp(name, "summary-tags"))
ctx.cfg.summary_tags = atoi(value);
else if (!strcmp(name, "side-by-side-diffs"))
ctx.cfg.ssdiff = atoi(value);
else if (!strcmp(name, "agefile"))
ctx.cfg.agefile = xstrdup(value);
else if (!strcmp(name, "mimetype-file"))
ctx.cfg.mimetype_file = xstrdup(value);
else if (!strcmp(name, "renamelimit"))
ctx.cfg.renamelimit = atoi(value);
else if (!strcmp(name, "remove-suffix"))
ctx.cfg.remove_suffix = atoi(value);
else if (!strcmp(name, "robots"))
ctx.cfg.robots = xstrdup(value);
else if (!strcmp(name, "clone-prefix"))
ctx.cfg.clone_prefix = xstrdup(value);
else if (!strcmp(name, "clone-url"))
ctx.cfg.clone_url = xstrdup(value);
else if (!strcmp(name, "local-time"))
ctx.cfg.local_time = atoi(value);
else if (!strcmp(name, "commit-sort")) {
if (!strcmp(value, "date"))
ctx.cfg.commit_sort = 1;
if (!strcmp(value, "topo"))
ctx.cfg.commit_sort = 2;
} else if (!strcmp(name, "branch-sort")) {
if (!strcmp(value, "age"))
ctx.cfg.branch_sort = 1;
if (!strcmp(value, "name"))
ctx.cfg.branch_sort = 0;
} else if (!prefixcmp(name, "mimetype."))
add_mimetype(name + 9, value);
else if (!strcmp(name, "include"))
parse_configfile(expand_macros(value), config_cb);
}
static void querystring_cb(const char *name, const char *value)
{
if (!value)
value = "";
if (!strcmp(name,"r")) {
ctx.qry.repo = xstrdup(value);
ctx.repo = cgit_get_repoinfo(value);
} else if (!strcmp(name, "p")) {
ctx.qry.page = xstrdup(value);
} else if (!strcmp(name, "url")) {
if (*value == '/')
value++;
ctx.qry.url = xstrdup(value);
cgit_parse_url(value);
} else if (!strcmp(name, "qt")) {
ctx.qry.grep = xstrdup(value);
} else if (!strcmp(name, "q")) {
ctx.qry.search = xstrdup(value);
} else if (!strcmp(name, "h")) {
ctx.qry.head = xstrdup(value);
ctx.qry.has_symref = 1;
} else if (!strcmp(name, "id")) {
ctx.qry.sha1 = xstrdup(value);
ctx.qry.has_sha1 = 1;
} else if (!strcmp(name, "id2")) {
ctx.qry.sha2 = xstrdup(value);
ctx.qry.has_sha1 = 1;
} else if (!strcmp(name, "ofs")) {
ctx.qry.ofs = atoi(value);
} else if (!strcmp(name, "path")) {
ctx.qry.path = trim_end(value, '/');
} else if (!strcmp(name, "name")) {
ctx.qry.name = xstrdup(value);
} else if (!strcmp(name, "mimetype")) {
ctx.qry.mimetype = xstrdup(value);
} else if (!strcmp(name, "s")) {
ctx.qry.sort = xstrdup(value);
} else if (!strcmp(name, "showmsg")) {
ctx.qry.showmsg = atoi(value);
} else if (!strcmp(name, "period")) {
ctx.qry.period = xstrdup(value);
} else if (!strcmp(name, "ss")) {
ctx.qry.ssdiff = atoi(value);
ctx.qry.has_ssdiff = 1;
} else if (!strcmp(name, "all")) {
ctx.qry.show_all = atoi(value);
} else if (!strcmp(name, "context")) {
ctx.qry.context = atoi(value);
} else if (!strcmp(name, "ignorews")) {
ctx.qry.ignorews = atoi(value);
}
}
static void prepare_context(void)
{
memset(&ctx, 0, sizeof(ctx));
ctx.cfg.agefile = "info/web/last-modified";
ctx.cfg.nocache = 0;
ctx.cfg.cache_size = 0;
ctx.cfg.cache_max_create_time = 5;
ctx.cfg.cache_root = CGIT_CACHE_ROOT;
ctx.cfg.cache_about_ttl = 15;
ctx.cfg.cache_snapshot_ttl = 5;
ctx.cfg.cache_repo_ttl = 5;
ctx.cfg.cache_root_ttl = 5;
ctx.cfg.cache_scanrc_ttl = 15;
ctx.cfg.cache_dynamic_ttl = 5;
ctx.cfg.cache_static_ttl = -1;
ctx.cfg.case_sensitive_sort = 1;
ctx.cfg.branch_sort = 0;
ctx.cfg.commit_sort = 0;
ctx.cfg.css = "/cgit.css";
ctx.cfg.logo = "/cgit.png";
ctx.cfg.favicon = "/favicon.ico";
ctx.cfg.local_time = 0;
ctx.cfg.enable_http_clone = 1;
ctx.cfg.enable_index_owner = 1;
ctx.cfg.enable_tree_linenumbers = 1;
ctx.cfg.enable_git_config = 0;
ctx.cfg.max_repo_count = 50;
ctx.cfg.max_commit_count = 50;
ctx.cfg.max_lock_attempts = 5;
ctx.cfg.max_msg_len = 80;
ctx.cfg.max_repodesc_len = 80;
ctx.cfg.max_blob_size = 0;
ctx.cfg.max_stats = 0;
ctx.cfg.project_list = NULL;
ctx.cfg.renamelimit = -1;
ctx.cfg.remove_suffix = 0;
ctx.cfg.robots = "index, nofollow";
ctx.cfg.root_title = "Git repository browser";
ctx.cfg.root_desc = "a fast webinterface for the git dscm";
ctx.cfg.scan_hidden_path = 0;
ctx.cfg.script_name = CGIT_SCRIPT_NAME;
ctx.cfg.section = "";
ctx.cfg.repository_sort = "name";
ctx.cfg.section_sort = 1;
ctx.cfg.summary_branches = 10;
ctx.cfg.summary_log = 10;
ctx.cfg.summary_tags = 10;
ctx.cfg.max_atom_items = 10;
ctx.cfg.ssdiff = 0;
ctx.env.cgit_config = getenv("CGIT_CONFIG");
ctx.env.http_host = getenv("HTTP_HOST");
ctx.env.https = getenv("HTTPS");
ctx.env.no_http = getenv("NO_HTTP");
ctx.env.path_info = getenv("PATH_INFO");
ctx.env.query_string = getenv("QUERY_STRING");
ctx.env.request_method = getenv("REQUEST_METHOD");
ctx.env.script_name = getenv("SCRIPT_NAME");
ctx.env.server_name = getenv("SERVER_NAME");
ctx.env.server_port = getenv("SERVER_PORT");
ctx.env.http_cookie = getenv("HTTP_COOKIE");
ctx.env.http_referer = getenv("HTTP_REFERER");
ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
ctx.env.authenticated = 0;
ctx.page.mimetype = "text/html";
ctx.page.charset = PAGE_ENCODING;
ctx.page.filename = NULL;
ctx.page.size = 0;
ctx.page.modified = time(NULL);
ctx.page.expires = ctx.page.modified;
ctx.page.etag = NULL;
memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
if (ctx.env.script_name)
ctx.cfg.script_name = xstrdup(ctx.env.script_name);
if (ctx.env.query_string)
ctx.qry.raw = xstrdup(ctx.env.query_string);
if (!ctx.env.cgit_config)
ctx.env.cgit_config = CGIT_CONFIG;
}
struct refmatch {
char *req_ref;
char *first_ref;
int match;
};
static int find_current_ref(const char *refname, const unsigned char *sha1,
int flags, void *cb_data)
{
struct refmatch *info;
info = (struct refmatch *)cb_data;
if (!strcmp(refname, info->req_ref))
info->match = 1;
if (!info->first_ref)
info->first_ref = xstrdup(refname);
return info->match;
}
static void free_refmatch_inner(struct refmatch *info)
{
if (info->first_ref)
free(info->first_ref);
}
static char *find_default_branch(struct cgit_repo *repo)
{
struct refmatch info;
char *ref;
info.req_ref = repo->defbranch;
info.first_ref = NULL;
info.match = 0;
for_each_branch_ref(find_current_ref, &info);
if (info.match)
ref = info.req_ref;
else
ref = info.first_ref;
if (ref)
ref = xstrdup(ref);
free_refmatch_inner(&info);
return ref;
}
static char *guess_defbranch(void)
{
const char *ref;
unsigned char sha1[20];
ref = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
if (!ref || prefixcmp(ref, "refs/heads/"))
return "master";
return xstrdup(ref + 11);
}
/* The caller must free filename and ref after calling this. */
static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
{
const char *colon;
*filename = NULL;
*ref = NULL;
if (!readme || !readme[0])
return;
/* Check if the readme is tracked in the git repo. */
colon = strchr(readme, ':');
if (colon && strlen(colon) > 1) {
/* If it starts with a colon, we want to use
* the default branch */
if (colon == readme && repo->defbranch)
*ref = xstrdup(repo->defbranch);
else
*ref = xstrndup(readme, colon - readme);
readme = colon + 1;
}
/* Prepend repo path to relative readme path unless tracked. */
if (!(*ref) && readme[0] != '/')
*filename = fmtalloc("%s/%s", repo->path, readme);
else
*filename = xstrdup(readme);
}
static void choose_readme(struct cgit_repo *repo)
{
int found;
char *filename, *ref;
struct string_list_item *entry;
if (!repo->readme.nr)
return;
found = 0;
for_each_string_list_item(entry, &repo->readme) {
parse_readme(entry->string, &filename, &ref, repo);
if (!filename) {
free(filename);
free(ref);
continue;
}
/* If there's only one item, we skip the possibly expensive
* selection process. */
if (repo->readme.nr == 1) {
found = 1;
break;
}
if (ref) {
if (cgit_ref_path_exists(filename, ref, 1)) {
found = 1;
break;
}
}
else if (!access(filename, R_OK)) {
found = 1;
break;
}
free(filename);
free(ref);
}
repo->readme.strdup_strings = 1;
string_list_clear(&repo->readme, 0);
repo->readme.strdup_strings = 0;
if (found)
string_list_append(&repo->readme, filename)->util = ref;
}
static int prepare_repo_cmd(void)
{
unsigned char sha1[20];
int nongit = 0;
int rc;
/* The path to the git repository. */
setenv("GIT_DIR", ctx.repo->path, 1);
/* Do not look in /etc/ for gitconfig and gitattributes. */
setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
setenv("GIT_ATTR_NOSYSTEM", "1", 1);
unsetenv("HOME");
unsetenv("XDG_CONFIG_HOME");
/* Setup the git directory and initialize the notes system. Both of these
* load local configuration from the git repository, so we do them both while
* the HOME variables are unset. */
setup_git_directory_gently(&nongit);
init_display_notes(NULL);
if (nongit) {
const char *name = ctx.repo->name;
rc = errno;
ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
"config error");
ctx.repo = NULL;
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("Failed to open %s: %s", name,
rc ? strerror(rc) : "Not a valid git repository");
cgit_print_docend();
return 1;
}
ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
if (!ctx.repo->defbranch)
ctx.repo->defbranch = guess_defbranch();
if (!ctx.qry.head) {
ctx.qry.nohead = 1;
ctx.qry.head = find_default_branch(ctx.repo);
}
if (!ctx.qry.head) {
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("Repository seems to be empty");
cgit_print_docend();
return 1;
}
if (get_sha1(ctx.qry.head, sha1)) {
char *tmp = xstrdup(ctx.qry.head);
ctx.qry.head = ctx.repo->defbranch;
ctx.page.status = 404;
ctx.page.statusmsg = "Not found";
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("Invalid branch: %s", tmp);
cgit_print_docend();
free(tmp);
return 1;
}
sort_string_list(&ctx.repo->submodules);
cgit_prepare_repo_env(ctx.repo);
choose_readme(ctx.repo);
return 0;
}
static inline void open_auth_filter(const char *function)
{
cgit_open_filter(ctx.cfg.auth_filter, function,
ctx.env.http_cookie ? ctx.env.http_cookie : "",
ctx.env.request_method ? ctx.env.request_method : "",
ctx.env.query_string ? ctx.env.query_string : "",
ctx.env.http_referer ? ctx.env.http_referer : "",
ctx.env.path_info ? ctx.env.path_info : "",
ctx.env.http_host ? ctx.env.http_host : "",
ctx.env.https ? ctx.env.https : "",
ctx.qry.repo ? ctx.qry.repo : "",
ctx.qry.page ? ctx.qry.page : "",
ctx.qry.url ? ctx.qry.url : "",
cgit_loginurl());
}
/* We intentionally keep this rather small, instead of looping and
* feeding it to the filter a couple bytes at a time. This way, the
* filter itself does not need to handle any denial of service or
* buffer bloat issues. If this winds up being too small, people
* will complain on the mailing list, and we'll increase it as needed. */
#define MAX_AUTHENTICATION_POST_BYTES 4096
/* The filter is expected to spit out "Status: " and all headers. */
static inline void authenticate_post(void)
{
char buffer[MAX_AUTHENTICATION_POST_BYTES];
int len;
open_auth_filter("authenticate-post");
len = ctx.env.content_length;
if (len > MAX_AUTHENTICATION_POST_BYTES)
len = MAX_AUTHENTICATION_POST_BYTES;
if (read(STDIN_FILENO, buffer, len) < 0)
die_errno("Could not read POST from stdin");
if (write(STDOUT_FILENO, buffer, len) < 0)
die_errno("Could not write POST to stdout");
cgit_close_filter(ctx.cfg.auth_filter);
exit(0);
}
static inline void authenticate_cookie(void)
{
/* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
if (!ctx.cfg.auth_filter) {
ctx.env.authenticated = 1;
return;
}
/* If we're having something POST'd to /login, we're authenticating POST,
* instead of the cookie, so call authenticate_post and bail out early.
* This pattern here should match /?p=login with POST. */
if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
!strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
authenticate_post();
return;
}
/* If we've made it this far, we're authenticating the cookie for real, so do that. */
open_auth_filter("authenticate-cookie");
ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
}
static void process_request(void)
{
struct cgit_cmd *cmd;
/* If we're not yet authenticated, no matter what page we're on,
* display the authentication body from the auth_filter. This should
* never be cached. */
if (!ctx.env.authenticated) {
ctx.page.title = "Authentication Required";
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
open_auth_filter("body");
cgit_close_filter(ctx.cfg.auth_filter);
cgit_print_docend();
return;
}
cmd = cgit_get_cmd();
if (!cmd) {
ctx.page.title = "cgit error";
ctx.page.status = 404;
ctx.page.statusmsg = "Not found";
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("Invalid request");
cgit_print_docend();
return;
}
if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
html_status(404, "Not found", 0);
return;
}
/* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
* in-project path limit to be made available at ctx.qry.vpath.
* Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
*/
ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
if (cmd->want_repo && !ctx.repo) {
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
cgit_print_error("No repository selected");
cgit_print_docend();
return;
}
if (ctx.repo && prepare_repo_cmd())
return;
if (cmd->want_layout) {
cgit_print_http_headers();
cgit_print_docstart();
cgit_print_pageheader();
}
cmd->fn();
if (cmd->want_layout)
cgit_print_docend();
}
static int cmp_repos(const void *a, const void *b)
{
const struct cgit_repo *ra = a, *rb = b;
return strcmp(ra->url, rb->url);
}
static char *build_snapshot_setting(int bitmap)
{
const struct cgit_snapshot_format *f;
struct strbuf result = STRBUF_INIT;
for (f = cgit_snapshot_formats; f->suffix; f++) {
if (f->bit & bitmap) {
if (result.len)
strbuf_addch(&result, ' ');
strbuf_addstr(&result, f->suffix);
}
}
return strbuf_detach(&result, NULL);
}
static char *get_first_line(char *txt)
{
char *t = xstrdup(txt);
char *p = strchr(t, '\n');
if (p)
*p = '\0';
return t;
}
static void print_repo(FILE *f, struct cgit_repo *repo)
{
struct string_list_item *item;
fprintf(f, "repo.url=%s\n", repo->url);
fprintf(f, "repo.name=%s\n", repo->name);
fprintf(f, "repo.path=%s\n", repo->path);
if (repo->owner)
fprintf(f, "repo.owner=%s\n", repo->owner);
if (repo->desc) {
char *tmp = get_first_line(repo->desc);
fprintf(f, "repo.desc=%s\n", tmp);
free(tmp);
}
for_each_string_list_item(item, &repo->readme) {
if (item->util)
fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
else
fprintf(f, "repo.readme=%s\n", item->string);
}
if (repo->defbranch)
fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
if (repo->module_link)
fprintf(f, "repo.module-link=%s\n", repo->module_link);
if (repo->section)
fprintf(f, "repo.section=%s\n", repo->section);
if (repo->clone_url)
fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
fprintf(f, "repo.enable-commit-graph=%d\n",
repo->enable_commit_graph);
fprintf(f, "repo.enable-log-filecount=%d\n",
repo->enable_log_filecount);
fprintf(f, "repo.enable-log-linecount=%d\n",
repo->enable_log_linecount);
if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
if (repo->snapshots != ctx.cfg.snapshots) {
char *tmp = build_snapshot_setting(repo->snapshots);
fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
free(tmp);
}
if (repo->max_stats != ctx.cfg.max_stats)
fprintf(f, "repo.max-stats=%s\n",
cgit_find_stats_periodname(repo->max_stats));
if (repo->logo)
fprintf(f, "repo.logo=%s\n", repo->logo);
if (repo->logo_link)
fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
if (repo->branch_sort == 1)
fprintf(f, "repo.branch-sort=age\n");
if (repo->commit_sort) {
if (repo->commit_sort == 1)
fprintf(f, "repo.commit-sort=date\n");
else if (repo->commit_sort == 2)
fprintf(f, "repo.commit-sort=topo\n");
}
fprintf(f, "\n");
}
static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
{
int i;
for (i = start; i < list->count; i++)
print_repo(f, &list->repos[i]);
}
/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
* and return 0 on success.
*/
static int generate_cached_repolist(const char *path, const char *cached_rc)
{
struct strbuf locked_rc = STRBUF_INIT;
int result = 0;
int idx;
FILE *f;
strbuf_addf(&locked_rc, "%s.lock", cached_rc);
f = fopen(locked_rc.buf, "wx");
if (!f) {
/* Inform about the error unless the lockfile already existed,
* since that only means we've got concurrent requests.
*/
result = errno;
if (result != EEXIST)
fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
locked_rc.buf, strerror(result), result);
goto out;
}
idx = cgit_repolist.count;
if (ctx.cfg.project_list)
scan_projects(path, ctx.cfg.project_list, repo_config);
else
scan_tree(path, repo_config);
print_repolist(f, &cgit_repolist, idx);
if (rename(locked_rc.buf, cached_rc))
fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
locked_rc.buf, cached_rc, strerror(errno), errno);
fclose(f);
out:
strbuf_release(&locked_rc);
return result;
}
static void process_cached_repolist(const char *path)
{
struct stat st;
struct strbuf cached_rc = STRBUF_INIT;
time_t age;
unsigned long hash;
hash = hash_str(path);
if (ctx.cfg.project_list)
hash += hash_str(ctx.cfg.project_list);
strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
if (stat(cached_rc.buf, &st)) {
/* Nothing is cached, we need to scan without forking. And
* if we fail to generate a cached repolist, we need to
* invoke scan_tree manually.
*/
if (generate_cached_repolist(path, cached_rc.buf)) {
if (ctx.cfg.project_list)
scan_projects(path, ctx.cfg.project_list,
repo_config);
else
scan_tree(path, repo_config);
}
goto out;
}
parse_configfile(cached_rc.buf, config_cb);
/* If the cached configfile hasn't expired, lets exit now */
age = time(NULL) - st.st_mtime;
if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
goto out;
/* The cached repolist has been parsed, but it was old. So lets
* rescan the specified path and generate a new cached repolist
* in a child-process to avoid latency for the current request.
*/
if (fork())
goto out;
exit(generate_cached_repolist(path, cached_rc.buf));
out:
strbuf_release(&cached_rc);
}
static void cgit_parse_args(int argc, const char **argv)
{
int i;
int scan = 0;
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "--version")) {
printf("CGit %s | http://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
#ifdef NO_LUA
printf("[-] ");
#else
printf("[+] ");
#endif
printf("Lua scripting\n");
#ifndef HAVE_LINUX_SENDFILE
printf("[-] ");
#else
printf("[+] ");
#endif
printf("Linux sendfile() usage\n");
exit(0);
}
if (!prefixcmp(argv[i], "--cache=")) {
ctx.cfg.cache_root = xstrdup(argv[i] + 8);
} else if (!strcmp(argv[i], "--nocache")) {
ctx.cfg.nocache = 1;
} else if (!strcmp(argv[i], "--nohttp")) {
ctx.env.no_http = "1";
} else if (!prefixcmp(argv[i], "--query=")) {
ctx.qry.raw = xstrdup(argv[i] + 8);
} else if (!prefixcmp(argv[i], "--repo=")) {
ctx.qry.repo = xstrdup(argv[i] + 7);
} else if (!prefixcmp(argv[i], "--page=")) {
ctx.qry.page = xstrdup(argv[i] + 7);
} else if (!prefixcmp(argv[i], "--head=")) {
ctx.qry.head = xstrdup(argv[i] + 7);
ctx.qry.has_symref = 1;
} else if (!prefixcmp(argv[i], "--sha1=")) {
ctx.qry.sha1 = xstrdup(argv[i] + 7);
ctx.qry.has_sha1 = 1;
} else if (!prefixcmp(argv[i], "--ofs=")) {
ctx.qry.ofs = atoi(argv[i] + 6);
} else if (!prefixcmp(argv[i], "--scan-tree=") ||
!prefixcmp(argv[i], "--scan-path=")) {
/*
* HACK: The global snapshot bit mask defines the set
* of allowed snapshot formats, but the config file
* hasn't been parsed yet so the mask is currently 0.
* By setting all bits high before scanning we make
* sure that any in-repo cgitrc snapshot setting is
* respected by scan_tree().
*
* NOTE: We assume that there aren't more than 8
* different snapshot formats supported by cgit...
*/
ctx.cfg.snapshots = 0xFF;
scan++;
scan_tree(argv[i] + 12, repo_config);
}
}
if (scan) {
qsort(cgit_repolist.repos, cgit_repolist.count,
sizeof(struct cgit_repo), cmp_repos);
print_repolist(stdout, &cgit_repolist, 0);
exit(0);
}
}
static int calc_ttl()
{
if (!ctx.repo)
return ctx.cfg.cache_root_ttl;
if (!ctx.qry.page)
return ctx.cfg.cache_repo_ttl;
if (!strcmp(ctx.qry.page, "about"))
return ctx.cfg.cache_about_ttl;
if (!strcmp(ctx.qry.page, "snapshot"))
return ctx.cfg.cache_snapshot_ttl;
if (ctx.qry.has_sha1)
return ctx.cfg.cache_static_ttl;
if (ctx.qry.has_symref)
return ctx.cfg.cache_dynamic_ttl;
return ctx.cfg.cache_repo_ttl;
}
int main(int argc, const char **argv)
{
const char *path;
int err, ttl;
cgit_init_filters();
atexit(cgit_cleanup_filters);
prepare_context();
cgit_repolist.length = 0;
cgit_repolist.count = 0;
cgit_repolist.repos = NULL;
cgit_parse_args(argc, argv);
parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
ctx.repo = NULL;
http_parse_querystring(ctx.qry.raw, querystring_cb);
/* If virtual-root isn't specified in cgitrc, lets pretend
* that virtual-root equals SCRIPT_NAME, minus any possibly
* trailing slashes.
*/
if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
/* If no url parameter is specified on the querystring, lets
* use PATH_INFO as url. This allows cgit to work with virtual
* urls without the need for rewriterules in the webserver (as
* long as PATH_INFO is included in the cache lookup key).
*/
path = ctx.env.path_info;
if (!ctx.qry.url && path) {
if (path[0] == '/')
path++;
ctx.qry.url = xstrdup(path);
if (ctx.qry.raw) {
char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
free(ctx.qry.raw);
ctx.qry.raw = newqry;
} else
ctx.qry.raw = xstrdup(ctx.qry.url);
cgit_parse_url(ctx.qry.url);
}
/* Before we go any further, we set ctx.env.authenticated by checking to see
* if the supplied cookie is valid. All cookies are valid if there is no
* auth_filter. If there is an auth_filter, the filter decides. */
authenticate_cookie();
ttl = calc_ttl();
if (ttl < 0)
ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
else
ctx.page.expires += ttl * 60;
if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
ctx.cfg.nocache = 1;
if (ctx.cfg.nocache)
ctx.cfg.cache_size = 0;
err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
ctx.qry.raw, ttl, process_request);
cgit_cleanup_filters();
if (err)
cgit_print_error("Error processing page: %s (%d)",
strerror(err), err);
return err;
}
