gboolean
cockpit_handler_default (CockpitWebServer *server,
const gchar *path,
GHashTable *headers,
CockpitWebResponse *response,
CockpitHandlerData *data)
{
CockpitWebService *service;
const gchar *remainder = NULL;
gboolean resource;
path = cockpit_web_response_get_path (response);
g_return_val_if_fail (path != NULL, FALSE);
resource = g_str_has_prefix (path, "/cockpit/") ||
g_str_has_prefix (path, "/cockpit+") ||
g_str_equal (path, "/cockpit");
// Check for auth
service = cockpit_auth_check_cookie (data->auth, path, headers);
/* Stuff in /cockpit or /cockpit+xxx */
if (resource)
{
cockpit_web_response_skip_path (response);
remainder = cockpit_web_response_get_path (response);
if (!remainder)
{
cockpit_web_response_error (response, 404, NULL, NULL);
return TRUE;
}
else if (g_str_has_prefix (remainder, "/static/"))
{
cockpit_branding_serve (service, response, path, remainder + 8,
data->os_release, data->branding_roots);
return TRUE;
}
}
if (resource)
{
if (g_str_equal (remainder, "/login"))
{
handle_login (data, service, path, headers, response);
}
else
{
handle_resource (data, service, path, headers, response);
}
}
else
{
handle_shell (data, service, path, headers, response);
}
return TRUE;
}
static void
handle_resource (CockpitHandlerData *data,
CockpitWebService *service,
const gchar *path,
GHashTable *headers,
CockpitWebResponse *response)
{
gchar *where;
where = cockpit_web_response_pop_path (response);
if (where && (where[0] == '@' || where[0] == '$') && where[1] != '\0')
{
if (service)
{
cockpit_channel_response_serve (service, headers, response, where,
cockpit_web_response_get_path (response));
}
else if (g_str_has_suffix (path, ".html"))
{
send_login_html (response, data);
}
else
{
cockpit_web_response_error (response, 401, NULL, NULL);
}
}
else
{
cockpit_web_response_error (response, 404, NULL, NULL);
}
g_free (where);
}
void
cockpit_channel_response_serve (CockpitWebService *service,
GHashTable *in_headers,
CockpitWebResponse *response,
const gchar *where,
const gchar *path)
{
CockpitChannelResponse *chesp = NULL;
CockpitTransport *transport = NULL;
CockpitCacheType cache_type = COCKPIT_WEB_RESPONSE_CACHE_PRIVATE;
const gchar *host = NULL;
const gchar *pragma;
gchar *quoted_etag = NULL;
GHashTable *out_headers = NULL;
gchar *val = NULL;
gboolean handled = FALSE;
GHashTableIter iter;
const gchar *checksum;
JsonObject *object = NULL;
JsonObject *heads;
gchar *channel = NULL;
gchar *language = NULL;
gpointer key;
gpointer value;
g_return_if_fail (COCKPIT_IS_WEB_SERVICE (service));
g_return_if_fail (in_headers != NULL);
g_return_if_fail (COCKPIT_IS_WEB_RESPONSE (response));
g_return_if_fail (path != NULL);
if (where == NULL)
{
host = "localhost";
}
else if (where[0] == '@')
{
host = where + 1;
}
else if (where[0] == '$')
{
quoted_etag = g_strdup_printf ("\"%s\"", where);
cache_type = COCKPIT_WEB_RESPONSE_CACHE_FOREVER;
pragma = g_hash_table_lookup (in_headers, "Pragma");
if ((!pragma || !strstr (pragma, "no-cache")) &&
(g_strcmp0 (g_hash_table_lookup (in_headers, "If-None-Match"), where) == 0 ||
g_strcmp0 (g_hash_table_lookup (in_headers, "If-None-Match"), quoted_etag) == 0))
{
cockpit_web_response_headers (response, 304, "Not Modified", 0, "ETag", quoted_etag, NULL);
cockpit_web_response_complete (response);
handled = TRUE;
goto out;
}
transport = cockpit_web_service_find_transport (service, where + 1);
if (!transport)
goto out;
host = cockpit_web_service_get_host (service, transport);
if (!host)
{
g_warn_if_reached ();
goto out;
}
}
else
{
goto out;
}
cockpit_web_response_set_cache_type (response, cache_type);
object = cockpit_transport_build_json ("command", "open",
"payload", "http-stream1",
"internal", "packages",
"method", "GET",
"host", host,
"path", path,
"binary", "raw",
NULL);
if (!transport)
{
transport = cockpit_web_service_ensure_transport (service, object);
if (!transport)
goto out;
}
if (where)
{
/*
* Maybe send back a redirect to the checksum url. We only do this if actually
* accessing a file, and not a some sort of data like '/checksum', or a root path
* like '/'
*/
if (where[0] == '@' && strchr (path, '.'))
{
checksum = cockpit_web_service_get_checksum (service, transport);
if (checksum)
{
handled = redirect_to_checksum_path (service, response, checksum, path);
goto out;
}
}
}
out_headers = cockpit_web_server_new_table ();
channel = cockpit_web_service_unique_channel (service);
json_object_set_string_member (object, "channel", channel);
if (quoted_etag)
{
/*
* If we have a checksum, then use it as an ETag. It is intentional that
* a cockpit-bridge version could (in the future) override this.
*/
g_hash_table_insert (out_headers, g_strdup ("ETag"), quoted_etag);
quoted_etag = NULL;
}
heads = json_object_new ();
g_hash_table_iter_init (&iter, in_headers);
while (g_hash_table_iter_next (&iter, &key, &value))
{
val = NULL;
if (g_ascii_strcasecmp (key, "Host") == 0 ||
g_ascii_strcasecmp (key, "Cookie") == 0 ||
g_ascii_strcasecmp (key, "Referer") == 0 ||
g_ascii_strcasecmp (key, "Connection") == 0 ||
g_ascii_strcasecmp (key, "Pragma") == 0 ||
g_ascii_strcasecmp (key, "Cache-Control") == 0 ||
g_ascii_strcasecmp (key, "User-Agent") == 0 ||
g_ascii_strcasecmp (key, "Accept-Charset") == 0 ||
g_ascii_strcasecmp (key, "Accept-Ranges") == 0 ||
g_ascii_strcasecmp (key, "Content-Length") == 0 ||
g_ascii_strcasecmp (key, "Content-MD5") == 0 ||
g_ascii_strcasecmp (key, "Content-Range") == 0 ||
g_ascii_strcasecmp (key, "Range") == 0 ||
g_ascii_strcasecmp (key, "TE") == 0 ||
g_ascii_strcasecmp (key, "Trailer") == 0 ||
g_ascii_strcasecmp (key, "Upgrade") == 0 ||
g_ascii_strcasecmp (key, "Transfer-Encoding") == 0)
continue;
json_object_set_string_member (heads, key, value);
g_free (val);
}
/* Parse the language out of the CockpitLang cookie */
language = cockpit_web_server_parse_cookie (in_headers, "CockpitLang");
if (language)
json_object_set_string_member (heads, "Accept-Language", language);
json_object_set_string_member (heads, "Host", host);
json_object_set_object_member (object, "headers", heads);
chesp = cockpit_channel_response_create (service, response, transport,
cockpit_web_response_get_path (response),
out_headers, object);
if (!where)
chesp->inject = cockpit_channel_inject_new (service, path);
handled = TRUE;
out:
g_free (language);
if (object)
json_object_unref (object);
g_free (quoted_etag);
if (out_headers)
g_hash_table_unref (out_headers);
g_free (channel);
if (!handled)
cockpit_web_response_error (response, 404, NULL, NULL);
}
/**
* cockpit_web_response_file:
* @response: the response
* @path: escaped path, or NULL to get from response
* @roots: directories to look for file in
*
* Serve a file from disk as an HTTP response.
*/
void
cockpit_web_response_file (CockpitWebResponse *response,
const gchar *escaped,
const gchar **roots)
{
const gchar *csp_header;
GError *error = NULL;
gchar *unescaped = NULL;
gchar *path = NULL;
GMappedFile *file = NULL;
const gchar *root;
GBytes *body;
g_return_if_fail (COCKPIT_IS_WEB_RESPONSE (response));
if (!escaped)
escaped = cockpit_web_response_get_path (response);
g_return_if_fail (escaped != NULL);
/* Someone is trying to escape the root directory, or access hidden files? */
unescaped = g_uri_unescape_string (escaped, NULL);
if (strstr (unescaped, "/.") || strstr (unescaped, "../") || strstr (unescaped, "//"))
{
g_debug ("%s: invalid path request", escaped);
cockpit_web_response_error (response, 404, NULL, "Not Found");
goto out;
}
again:
root = *(roots++);
if (root == NULL)
{
cockpit_web_response_error (response, 404, NULL, "Not Found");
goto out;
}
g_free (path);
path = g_build_filename (root, unescaped, NULL);
if (g_file_test (path, G_FILE_TEST_IS_DIR))
{
cockpit_web_response_error (response, 403, NULL, "Directory Listing Denied");
goto out;
}
/* As a double check of above behavior */
g_assert (path_has_prefix (path, root));
g_clear_error (&error);
file = g_mapped_file_new (path, FALSE, &error);
if (file == NULL)
{
if (g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NAMETOOLONG))
{
g_debug ("%s: file not found in root: %s", escaped, root);
goto again;
}
else if (g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_PERM) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_ACCES) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_ISDIR))
{
cockpit_web_response_error (response, 403, NULL, "Access denied");
goto out;
}
else
{
g_warning ("%s: %s", path, error->message);
cockpit_web_response_error (response, 500, NULL, "Internal server error");
goto out;
}
}
body = g_mapped_file_get_bytes (file);
/*
* The default Content-Security-Policy for .html files allows
* the site to have inline <script> and <style> tags. This code
* is not used when serving resources once logged in, only for
* static resources when we don't yet have a session.
*/
csp_header = NULL;
if (g_str_has_suffix (unescaped, ".html"))
csp_header = "Content-Security-Policy";
cockpit_web_response_headers (response, 200, "OK", g_bytes_get_size (body),
csp_header, "default-src 'self' 'unsafe-inline'; connect-src 'self' ws: wss:",
NULL);
if (cockpit_web_response_queue (response, body))
cockpit_web_response_complete (response);
g_bytes_unref (body);
out:
g_free (unescaped);
g_clear_error (&error);
g_free (path);
if (file)
g_mapped_file_unref (file);
}
/**
* cockpit_web_response_file:
* @response: the response
* @path: escaped path, or NULL to get from response
* @roots: directories to look for file in
*
* Serve a file from disk as an HTTP response.
*/
void
cockpit_web_response_file (CockpitWebResponse *response,
const gchar *escaped,
gboolean cache_forever,
const gchar **roots)
{
const gchar *cache_control;
GError *error = NULL;
gchar *unescaped;
char *path = NULL;
gchar *built = NULL;
GMappedFile *file = NULL;
const gchar *root;
GBytes *body;
g_return_if_fail (COCKPIT_IS_WEB_RESPONSE (response));
if (!escaped)
escaped = cockpit_web_response_get_path (response);
g_return_if_fail (escaped != NULL);
again:
root = *(roots++);
if (root == NULL)
{
cockpit_web_response_error (response, 404, NULL, "Not Found");
goto out;
}
unescaped = g_uri_unescape_string (escaped, NULL);
built = g_build_filename (root, unescaped, NULL);
g_free (unescaped);
path = realpath (built, NULL);
g_free (built);
if (path == NULL)
{
if (errno == ENOENT || errno == ENOTDIR || errno == ELOOP || errno == ENAMETOOLONG)
{
g_debug ("%s: file not found in root: %s", escaped, root);
goto again;
}
else if (errno == EACCES)
{
cockpit_web_response_error (response, 403, NULL, "Access Denied");
goto out;
}
else
{
g_warning ("%s: resolving path failed: %m", escaped);
cockpit_web_response_error (response, 500, NULL, "Internal Server Error");
goto out;
}
}
/* Double check that realpath() did the right thing */
g_return_if_fail (strstr (path, "../") == NULL);
g_return_if_fail (!g_str_has_suffix (path, "/.."));
/* Someone is trying to escape the root directory */
if (!path_has_prefix (path, root) &&
!path_has_prefix (path, cockpit_web_exception_escape_root))
{
g_debug ("%s: request tried to escape the root directory: %s: %s", escaped, root, path);
cockpit_web_response_error (response, 404, NULL, "Not Found");
goto out;
}
if (g_file_test (path, G_FILE_TEST_IS_DIR))
{
cockpit_web_response_error (response, 403, NULL, "Directory Listing Denied");
goto out;
}
file = g_mapped_file_new (path, FALSE, &error);
if (file == NULL)
{
if (g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_PERM) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_ACCES) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_ISDIR))
{
cockpit_web_response_error (response, 403, NULL, "Access denied");
g_clear_error (&error);
goto out;
}
else
{
g_warning ("%s: %s", path, error->message);
cockpit_web_response_error (response, 500, NULL, "Internal server error");
g_clear_error (&error);
goto out;
}
}
body = g_mapped_file_get_bytes (file);
cache_control = cache_forever ? "max-age=31556926, public" : NULL;
cockpit_web_response_headers (response, 200, "OK", g_bytes_get_size (body),
"Cache-Control", cache_control,
NULL);
if (cockpit_web_response_queue (response, body))
cockpit_web_response_complete (response);
g_bytes_unref (body);
out:
free (path);
if (file)
g_mapped_file_unref (file);
}
/**
* cockpit_web_response_file:
* @response: the response
* @path: escaped path, or NULL to get from response
* @roots: directories to look for file in
*
* Serve a file from disk as an HTTP response.
*/
void
cockpit_web_response_file (CockpitWebResponse *response,
const gchar *escaped,
gboolean cache_forever,
const gchar **roots)
{
const gchar *cache_control;
GError *error = NULL;
gchar *unescaped = NULL;
gchar *path = NULL;
GMappedFile *file = NULL;
const gchar *root;
GBytes *body;
g_return_if_fail (COCKPIT_IS_WEB_RESPONSE (response));
if (!escaped)
escaped = cockpit_web_response_get_path (response);
g_return_if_fail (escaped != NULL);
/* Someone is trying to escape the root directory, or access hidden files? */
unescaped = g_uri_unescape_string (escaped, NULL);
if (strstr (unescaped, "/.") || strstr (unescaped, "../") || strstr (unescaped, "//"))
{
g_debug ("%s: invalid path request", escaped);
cockpit_web_response_error (response, 404, NULL, "Not Found");
goto out;
}
again:
root = *(roots++);
if (root == NULL)
{
cockpit_web_response_error (response, 404, NULL, "Not Found");
goto out;
}
g_free (path);
path = g_build_filename (root, unescaped, NULL);
if (g_file_test (path, G_FILE_TEST_IS_DIR))
{
cockpit_web_response_error (response, 403, NULL, "Directory Listing Denied");
goto out;
}
/* As a double check of above behavior */
g_assert (path_has_prefix (path, root));
g_clear_error (&error);
file = g_mapped_file_new (path, FALSE, &error);
if (file == NULL)
{
if (g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NAMETOOLONG))
{
g_debug ("%s: file not found in root: %s", escaped, root);
goto again;
}
else if (g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_PERM) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_ACCES) ||
g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_ISDIR))
{
cockpit_web_response_error (response, 403, NULL, "Access denied");
goto out;
}
else
{
g_warning ("%s: %s", path, error->message);
cockpit_web_response_error (response, 500, NULL, "Internal server error");
goto out;
}
}
body = g_mapped_file_get_bytes (file);
cache_control = cache_forever ? "max-age=31556926, public" : NULL;
cockpit_web_response_headers (response, 200, "OK", g_bytes_get_size (body),
"Cache-Control", cache_control,
NULL);
if (cockpit_web_response_queue (response, body))
cockpit_web_response_complete (response);
g_bytes_unref (body);
out:
g_free (unescaped);
g_clear_error (&error);
g_free (path);
if (file)
g_mapped_file_unref (file);
}
