/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * Copyright (C) 2011 Tim-Philipp Müller * Copyright (C) 2014 David Waring, British Broadcasting Corporation * * * gsturi.c: register URI handlers and IETF RFC 3986 URI manipulations. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:gsturihandler * @title: GstUriHandler * @short_description: Interface to ease URI handling in plugins. * * The #GstURIHandler is an interface that is implemented by Source and Sink * #GstElement to unify handling of URI. * * An application can use the following functions to quickly get an element * that handles the given URI for reading or writing * (gst_element_make_from_uri()). * * Source and Sink plugins should implement this interface when possible. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #define GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS #include "gst_private.h" #include "gst.h" #include "gsturi.h" #include "gstinfo.h" #include "gstregistry.h" #include "gst-i18n-lib.h" #include #include #include GST_DEBUG_CATEGORY_STATIC (gst_uri_handler_debug); #define GST_CAT_DEFAULT gst_uri_handler_debug #ifndef HAVE_STRCASESTR #define strcasestr _gst_ascii_strcasestr /* From https://github.com/freebsd/freebsd/blob/master/contrib/file/src/strcasestr.c * Updated to use GLib types and GLib string functions * * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Find the first occurrence of find in s, ignore case. */ static gchar * _gst_ascii_strcasestr (const gchar * s, const gchar * find) { gchar c, sc; gsize len; if ((c = *find++) != 0) { c = g_ascii_tolower (c); len = strlen (find); do { do { if ((sc = *s++) == 0) return (NULL); } while (g_ascii_tolower (sc) != c); } while (g_ascii_strncasecmp (s, find, len) != 0); s--; } return (gchar *) (gintptr) (s); } #endif GType gst_uri_handler_get_type (void) { static gsize urihandler_type = 0; if (g_once_init_enter (&urihandler_type)) { GType _type; static const GTypeInfo urihandler_info = { sizeof (GstURIHandlerInterface), NULL, NULL, NULL, NULL, NULL, 0, 0, NULL, NULL }; _type = g_type_register_static (G_TYPE_INTERFACE, "GstURIHandler", &urihandler_info, 0); GST_DEBUG_CATEGORY_INIT (gst_uri_handler_debug, "GST_URI", GST_DEBUG_BOLD, "handling of URIs"); g_once_init_leave (&urihandler_type, _type); } return urihandler_type; } GQuark gst_uri_error_quark (void) { return g_quark_from_static_string ("gst-uri-error-quark"); } #define HEX_ESCAPE '%' #ifndef GST_REMOVE_DEPRECATED static const guchar acceptable[96] = { /* X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 XA XB XC XD XE XF */ 0x00, 0x3F, 0x20, 0x20, 0x20, 0x00, 0x2C, 0x3F, 0x3F, 0x3F, 0x3F, 0x22, 0x20, 0x3F, 0x3F, 0x1C, /* 2X !"#$%&'()*+,-./ */ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x38, 0x20, 0x20, 0x2C, 0x20, 0x2C, /* 3X 0123456789:;<=>? */ 0x30, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, /* 4X @ABCDEFGHIJKLMNO */ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x20, 0x20, 0x20, 0x20, 0x3F, /* 5X PQRSTUVWXYZ[\]^_ */ 0x20, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, /* 6X `abcdefghijklmno */ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x20, 0x20, 0x20, 0x3F, 0x20 /* 7X pqrstuvwxyz{|}~DEL */ }; typedef enum { UNSAFE_ALL = 0x1, /* Escape all unsafe characters */ UNSAFE_ALLOW_PLUS = 0x2, /* Allows '+' */ UNSAFE_PATH = 0x4, /* Allows '/' and '?' and '&' and '=' */ UNSAFE_DOS_PATH = 0x8, /* Allows '/' and '?' and '&' and '=' and ':' */ UNSAFE_HOST = 0x10, /* Allows '/' and ':' and '@' */ UNSAFE_SLASHES = 0x20 /* Allows all characters except for '/' and '%' */ } UnsafeCharacterSet; /* Escape undesirable characters using % * ------------------------------------- * * This function takes a pointer to a string in which * some characters may be unacceptable unescaped. * It returns a string which has these characters * represented by a '%' character followed by two hex digits. * * This routine returns a g_malloced string. */ static const gchar hex[16] = "0123456789ABCDEF"; static gchar * escape_string_internal (const gchar * string, UnsafeCharacterSet mask) { #define ACCEPTABLE_CHAR(a) ((a)>=32 && (a)<128 && (acceptable[(a)-32] & use_mask)) const gchar *p; gchar *q; gchar *result; guchar c; gint unacceptable; UnsafeCharacterSet use_mask; g_return_val_if_fail (mask == UNSAFE_ALL || mask == UNSAFE_ALLOW_PLUS || mask == UNSAFE_PATH || mask == UNSAFE_DOS_PATH || mask == UNSAFE_HOST || mask == UNSAFE_SLASHES, NULL); if (string == NULL) { return NULL; } unacceptable = 0; use_mask = mask; for (p = string; *p != '\0'; p++) { c = *p; if (!ACCEPTABLE_CHAR (c)) { unacceptable++; } if ((use_mask == UNSAFE_HOST) && (unacceptable || (c == '/'))) { /* when escaping a host, if we hit something that needs to be escaped, or we finally * hit a path separator, revert to path mode (the host segment of the url is over). */ use_mask = UNSAFE_PATH; } } result = g_malloc (p - string + unacceptable * 2 + 1); use_mask = mask; for (q = result, p = string; *p != '\0'; p++) { c = *p; if (!ACCEPTABLE_CHAR (c)) { *q++ = HEX_ESCAPE; /* means hex coming */ *q++ = hex[c >> 4]; *q++ = hex[c & 15]; } else { *q++ = c; } if ((use_mask == UNSAFE_HOST) && (!ACCEPTABLE_CHAR (c) || (c == '/'))) { use_mask = UNSAFE_PATH; } } *q = '\0'; return result; } #endif static int hex_to_int (gchar c) { return c >= '0' && c <= '9' ? c - '0' : c >= 'A' && c <= 'F' ? c - 'A' + 10 : c >= 'a' && c <= 'f' ? c - 'a' + 10 : -1; } static int unescape_character (const char *scanner) { int first_digit; int second_digit; first_digit = hex_to_int (*scanner++); if (first_digit < 0) { return -1; } second_digit = hex_to_int (*scanner); if (second_digit < 0) { return -1; } return (first_digit << 4) | second_digit; } /* unescape_string: * @escaped_string: an escaped URI, path, or other string * @illegal_characters: a string containing a sequence of characters * considered "illegal", '\0' is automatically in this list. * * Decodes escaped characters (i.e. PERCENTxx sequences) in @escaped_string. * Characters are encoded in PERCENTxy form, where xy is the ASCII hex code * for character 16x+y. * * Return value: (nullable): a newly allocated string with the * unescaped equivalents, or %NULL if @escaped_string contained one of * the characters in @illegal_characters. **/ static char * unescape_string (const gchar * escaped_string, const gchar * illegal_characters) { const gchar *in; gchar *out, *result; gint character; if (escaped_string == NULL) { return NULL; } result = g_malloc (strlen (escaped_string) + 1); out = result; for (in = escaped_string; *in != '\0'; in++) { character = *in; if (*in == HEX_ESCAPE) { character = unescape_character (in + 1); /* Check for an illegal character. We consider '\0' illegal here. */ if (character <= 0 || (illegal_characters != NULL && strchr (illegal_characters, (char) character) != NULL)) { g_free (result); return NULL; } in += 2; } *out++ = (char) character; } *out = '\0'; g_assert ((gsize) (out - result) <= strlen (escaped_string)); return result; } static void gst_uri_protocol_check_internal (const gchar * uri, gchar ** endptr) { gchar *check = (gchar *) uri; g_assert (uri != NULL); g_assert (endptr != NULL); if (g_ascii_isalpha (*check)) { check++; while (g_ascii_isalnum (*check) || *check == '+' || *check == '-' || *check == '.') check++; } *endptr = check; } /** * gst_uri_protocol_is_valid: * @protocol: A string * * Tests if the given string is a valid protocol identifier. Protocols * must consist of alphanumeric characters, '+', '-' and '.' and must * start with a alphabetic character. See RFC 3986 Section 3.1. * * Returns: %TRUE if the string is a valid protocol identifier, %FALSE otherwise. */ gboolean gst_uri_protocol_is_valid (const gchar * protocol) { gchar *endptr; g_return_val_if_fail (protocol != NULL, FALSE); gst_uri_protocol_check_internal (protocol, &endptr); return *endptr == '\0' && ((gsize) (endptr - protocol)) >= 2; } /** * gst_uri_is_valid: * @uri: A URI string * * Tests if the given string is a valid URI identifier. URIs start with a valid * scheme followed by ":" and maybe a string identifying the location. * * Returns: %TRUE if the string is a valid URI */ gboolean gst_uri_is_valid (const gchar * uri) { gchar *endptr; g_return_val_if_fail (uri != NULL, FALSE); gst_uri_protocol_check_internal (uri, &endptr); return *endptr == ':' && ((gsize) (endptr - uri)) >= 2; } /** * gst_uri_get_protocol: * @uri: A URI string * * Extracts the protocol out of a given valid URI. The returned string must be * freed using g_free(). * * Returns: (nullable): The protocol for this URI. */ gchar * gst_uri_get_protocol (const gchar * uri) { gchar *colon; g_return_val_if_fail (uri != NULL, NULL); g_return_val_if_fail (gst_uri_is_valid (uri), NULL); colon = strstr (uri, ":"); return g_ascii_strdown (uri, colon - uri); } /** * gst_uri_has_protocol: * @uri: a URI string * @protocol: a protocol string (e.g. "http") * * Checks if the protocol of a given valid URI matches @protocol. * * Returns: %TRUE if the protocol matches. */ gboolean gst_uri_has_protocol (const gchar * uri, const gchar * protocol) { gchar *colon; g_return_val_if_fail (uri != NULL, FALSE); g_return_val_if_fail (protocol != NULL, FALSE); g_return_val_if_fail (gst_uri_is_valid (uri), FALSE); colon = strstr (uri, ":"); if (colon == NULL) return FALSE; return (g_ascii_strncasecmp (uri, protocol, (gsize) (colon - uri)) == 0); } /** * gst_uri_get_location: * @uri: A URI string * * Extracts the location out of a given valid URI, ie. the protocol and "://" * are stripped from the URI, which means that the location returned includes * the hostname if one is specified. The returned string must be freed using * g_free(). * * Free-function: g_free * * Returns: (transfer full) (nullable): the location for this URI. Returns * %NULL if the URI isn't valid. If the URI does not contain a location, an * empty string is returned. */ gchar * gst_uri_get_location (const gchar * uri) { const gchar *colon; gchar *unescaped = NULL; g_return_val_if_fail (uri != NULL, NULL); g_return_val_if_fail (gst_uri_is_valid (uri), NULL); colon = strstr (uri, "://"); if (!colon) return NULL; unescaped = unescape_string (colon + 3, "/"); /* On Windows an URI might look like file:///c:/foo/bar.txt or * file:///c|/foo/bar.txt (some Netscape versions) and we want to * return c:/foo/bar.txt as location rather than /c:/foo/bar.txt. * Can't use g_filename_from_uri() here because it will only handle the * file:// protocol */ #ifdef G_OS_WIN32 if (unescaped != NULL && unescaped[0] == '/' && g_ascii_isalpha (unescaped[1]) && (unescaped[2] == ':' || unescaped[2] == '|')) { unescaped[2] = ':'; memmove (unescaped, unescaped + 1, strlen (unescaped + 1) + 1); } #endif GST_LOG ("extracted location '%s' from URI '%s'", GST_STR_NULL (unescaped), uri); return unescaped; } /** * gst_uri_construct: * @protocol: Protocol for URI * @location: (transfer none): Location for URI * * Constructs a URI for a given valid protocol and location. * * Free-function: g_free * * Returns: (transfer full): a new string for this URI. Returns %NULL if the * given URI protocol is not valid, or the given location is %NULL. * * Deprecated: Use GstURI instead. */ #ifndef GST_REMOVE_DEPRECATED gchar * gst_uri_construct (const gchar * protocol, const gchar * location) { char *escaped, *proto_lowercase; char *retval; g_return_val_if_fail (gst_uri_protocol_is_valid (protocol), NULL); g_return_val_if_fail (location != NULL, NULL); proto_lowercase = g_ascii_strdown (protocol, -1); escaped = escape_string_internal (location, UNSAFE_PATH); retval = g_strdup_printf ("%s://%s", proto_lowercase, escaped); g_free (escaped); g_free (proto_lowercase); return retval; } #endif typedef struct { GstURIType type; const gchar *protocol; } SearchEntry; static gboolean search_by_entry (GstPluginFeature * feature, gpointer search_entry) { const gchar *const *protocols; GstElementFactory *factory; SearchEntry *entry = (SearchEntry *) search_entry; if (!GST_IS_ELEMENT_FACTORY (feature)) return FALSE; factory = GST_ELEMENT_FACTORY_CAST (feature); if (factory->uri_type != entry->type) return FALSE; protocols = gst_element_factory_get_uri_protocols (factory); if (protocols == NULL) { g_warning ("Factory '%s' implements GstUriHandler interface but returned " "no supported protocols!", gst_plugin_feature_get_name (feature)); return FALSE; } while (*protocols != NULL) { if (g_ascii_strcasecmp (*protocols, entry->protocol) == 0) return TRUE; protocols++; } return FALSE; } static gint sort_by_rank (GstPluginFeature * first, GstPluginFeature * second) { return gst_plugin_feature_get_rank (second) - gst_plugin_feature_get_rank (first); } static GList * get_element_factories_from_uri_protocol (const GstURIType type, const gchar * protocol) { GList *possibilities; SearchEntry entry; g_return_val_if_fail (protocol, NULL); entry.type = type; entry.protocol = protocol; possibilities = gst_registry_feature_filter (gst_registry_get (), search_by_entry, FALSE, &entry); return possibilities; } /** * gst_uri_protocol_is_supported: * @type: Whether to check for a source or a sink * @protocol: Protocol that should be checked for (e.g. "http" or "smb") * * Checks if an element exists that supports the given URI protocol. Note * that a positive return value does not imply that a subsequent call to * gst_element_make_from_uri() is guaranteed to work. * * Returns: %TRUE */ gboolean gst_uri_protocol_is_supported (const GstURIType type, const gchar * protocol) { GList *possibilities; g_return_val_if_fail (protocol, FALSE); possibilities = get_element_factories_from_uri_protocol (type, protocol); if (possibilities) { g_list_free (possibilities); return TRUE; } else return FALSE; } /** * gst_element_make_from_uri: * @type: Whether to create a source or a sink * @uri: URI to create an element for * @elementname: (allow-none): Name of created element, can be %NULL. * @error: (allow-none): address where to store error information, or %NULL. * * Creates an element for handling the given URI. * * Returns: (transfer floating): a new element or %NULL if none * could be created */ GstElement * gst_element_make_from_uri (const GstURIType type, const gchar * uri, const gchar * elementname, GError ** error) { GList *possibilities, *walk; gchar *protocol; GstElement *ret = NULL; g_return_val_if_fail (gst_is_initialized (), NULL); g_return_val_if_fail (GST_URI_TYPE_IS_VALID (type), NULL); g_return_val_if_fail (gst_uri_is_valid (uri), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); GST_DEBUG ("type:%d, uri:%s, elementname:%s", type, uri, elementname); protocol = gst_uri_get_protocol (uri); possibilities = get_element_factories_from_uri_protocol (type, protocol); if (!possibilities) { GST_DEBUG ("No %s for URI '%s'", type == GST_URI_SINK ? "sink" : "source", uri); /* The error message isn't great, but we don't expect applications to * show that error to users, but call the missing plugins functions */ g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_UNSUPPORTED_PROTOCOL, _("No URI handler for the %s protocol found"), protocol); g_free (protocol); return NULL; } g_free (protocol); possibilities = g_list_sort (possibilities, (GCompareFunc) sort_by_rank); walk = possibilities; while (walk) { GstElementFactory *factory = walk->data; GError *uri_err = NULL; ret = gst_element_factory_create (factory, elementname); if (ret != NULL) { GstURIHandler *handler = GST_URI_HANDLER (ret); if (gst_uri_handler_set_uri (handler, uri, &uri_err)) break; GST_WARNING ("%s didn't accept URI '%s': %s", GST_OBJECT_NAME (ret), uri, uri_err->message); if (error != NULL && *error == NULL) g_propagate_error (error, uri_err); else g_error_free (uri_err); gst_object_unref (ret); ret = NULL; } walk = walk->next; } gst_plugin_feature_list_free (possibilities); GST_LOG_OBJECT (ret, "created %s for URL '%s'", type == GST_URI_SINK ? "sink" : "source", uri); /* if the first handler didn't work, but we found another one that works */ if (ret != NULL) g_clear_error (error); return ret; } /** * gst_uri_handler_get_uri_type: * @handler: A #GstURIHandler. * * Gets the type of the given URI handler * * Returns: the #GstURIType of the URI handler. * Returns #GST_URI_UNKNOWN if the @handler isn't implemented correctly. */ GstURIType gst_uri_handler_get_uri_type (GstURIHandler * handler) { GstURIHandlerInterface *iface; GstURIType ret; g_return_val_if_fail (GST_IS_URI_HANDLER (handler), GST_URI_UNKNOWN); iface = GST_URI_HANDLER_GET_INTERFACE (handler); g_return_val_if_fail (iface != NULL, GST_URI_UNKNOWN); g_return_val_if_fail (iface->get_type != NULL, GST_URI_UNKNOWN); ret = iface->get_type (G_OBJECT_TYPE (handler)); g_return_val_if_fail (GST_URI_TYPE_IS_VALID (ret), GST_URI_UNKNOWN); return ret; } /** * gst_uri_handler_get_protocols: * @handler: A #GstURIHandler. * * Gets the list of protocols supported by @handler. This list may not be * modified. * * Returns: (transfer none) (element-type utf8) (nullable): the * supported protocols. Returns %NULL if the @handler isn't * implemented properly, or the @handler doesn't support any * protocols. */ const gchar *const * gst_uri_handler_get_protocols (GstURIHandler * handler) { GstURIHandlerInterface *iface; const gchar *const *ret; g_return_val_if_fail (GST_IS_URI_HANDLER (handler), NULL); iface = GST_URI_HANDLER_GET_INTERFACE (handler); g_return_val_if_fail (iface != NULL, NULL); g_return_val_if_fail (iface->get_protocols != NULL, NULL); ret = iface->get_protocols (G_OBJECT_TYPE (handler)); g_return_val_if_fail (ret != NULL, NULL); return ret; } /** * gst_uri_handler_get_uri: * @handler: A #GstURIHandler * * Gets the currently handled URI. * * Returns: (transfer full) (nullable): the URI currently handled by * the @handler. Returns %NULL if there are no URI currently * handled. The returned string must be freed with g_free() when no * longer needed. */ gchar * gst_uri_handler_get_uri (GstURIHandler * handler) { GstURIHandlerInterface *iface; gchar *ret; g_return_val_if_fail (GST_IS_URI_HANDLER (handler), NULL); iface = GST_URI_HANDLER_GET_INTERFACE (handler); g_return_val_if_fail (iface != NULL, NULL); g_return_val_if_fail (iface->get_uri != NULL, NULL); ret = iface->get_uri (handler); if (ret != NULL) g_return_val_if_fail (gst_uri_is_valid (ret), NULL); return ret; } /** * gst_uri_handler_set_uri: * @handler: A #GstURIHandler * @uri: URI to set * @error: (allow-none): address where to store a #GError in case of * an error, or %NULL * * Tries to set the URI of the given handler. * * Returns: %TRUE if the URI was set successfully, else %FALSE. */ gboolean gst_uri_handler_set_uri (GstURIHandler * handler, const gchar * uri, GError ** error) { GstURIHandlerInterface *iface; gboolean ret; gchar *protocol; g_return_val_if_fail (GST_IS_URI_HANDLER (handler), FALSE); g_return_val_if_fail (gst_uri_is_valid (uri), FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); iface = GST_URI_HANDLER_GET_INTERFACE (handler); g_return_val_if_fail (iface != NULL, FALSE); g_return_val_if_fail (iface->set_uri != NULL, FALSE); protocol = gst_uri_get_protocol (uri); if (iface->get_protocols) { const gchar *const *protocols; const gchar *const *p; gboolean found_protocol = FALSE; protocols = iface->get_protocols (G_OBJECT_TYPE (handler)); if (protocols != NULL) { for (p = protocols; *p != NULL; ++p) { if (g_ascii_strcasecmp (protocol, *p) == 0) { found_protocol = TRUE; break; } } if (!found_protocol) { g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_UNSUPPORTED_PROTOCOL, _("URI scheme '%s' not supported"), protocol); g_free (protocol); return FALSE; } } } ret = iface->set_uri (handler, uri, error); g_free (protocol); return ret; } static gchar * gst_file_utils_canonicalise_path (const gchar * path) { gchar **parts, **p, *clean_path; #ifdef G_OS_WIN32 { GST_WARNING ("FIXME: canonicalise win32 path"); return g_strdup (path); } #endif parts = g_strsplit (path, "/", -1); p = parts; while (*p != NULL) { if (strcmp (*p, ".") == 0) { /* just move all following parts on top of this, incl. NUL terminator */ g_free (*p); memmove (p, p + 1, (g_strv_length (p + 1) + 1) * sizeof (gchar *)); /* re-check the new current part again in the next iteration */ continue; } else if (strcmp (*p, "..") == 0 && p > parts) { /* just move all following parts on top of the previous part, incl. * NUL terminator */ g_free (*(p - 1)); g_free (*p); memmove (p - 1, p + 1, (g_strv_length (p + 1) + 1) * sizeof (gchar *)); /* re-check the new current part again in the next iteration */ --p; continue; } ++p; } if (*path == '/') { guint num_parts; num_parts = g_strv_length (parts) + 1; /* incl. terminator */ parts = g_renew (gchar *, parts, num_parts + 1); memmove (parts + 1, parts, num_parts * sizeof (gchar *)); parts[0] = g_strdup ("/"); } clean_path = g_build_filenamev (parts); g_strfreev (parts); return clean_path; } static gboolean file_path_contains_relatives (const gchar * path) { return (strstr (path, "/./") != NULL || strstr (path, "/../") != NULL || strstr (path, G_DIR_SEPARATOR_S "." G_DIR_SEPARATOR_S) != NULL || strstr (path, G_DIR_SEPARATOR_S ".." G_DIR_SEPARATOR_S) != NULL); } /** * gst_filename_to_uri: * @filename: (type filename): absolute or relative file name path * @error: pointer to error, or %NULL * * Similar to g_filename_to_uri(), but attempts to handle relative file paths * as well. Before converting @filename into an URI, it will be prefixed by * the current working directory if it is a relative path, and then the path * will be canonicalised so that it doesn't contain any './' or '../' segments. * * On Windows @filename should be in UTF-8 encoding. * * Returns: newly-allocated URI string, or NULL on error. The caller must * free the URI string with g_free() when no longer needed. */ gchar * gst_filename_to_uri (const gchar * filename, GError ** error) { gchar *abs_location = NULL; gchar *uri, *abs_clean; g_return_val_if_fail (filename != NULL, NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); if (g_path_is_absolute (filename)) { if (!file_path_contains_relatives (filename)) { uri = g_filename_to_uri (filename, NULL, error); goto beach; } abs_location = g_strdup (filename); } else { gchar *cwd; cwd = g_get_current_dir (); abs_location = g_build_filename (cwd, filename, NULL); g_free (cwd); if (!file_path_contains_relatives (abs_location)) { uri = g_filename_to_uri (abs_location, NULL, error); goto beach; } } /* path is now absolute, but contains '.' or '..' */ abs_clean = gst_file_utils_canonicalise_path (abs_location); GST_LOG ("'%s' -> '%s' -> '%s'", filename, abs_location, abs_clean); uri = g_filename_to_uri (abs_clean, NULL, error); g_free (abs_clean); beach: g_free (abs_location); GST_DEBUG ("'%s' -> '%s'", filename, uri); return uri; } /**************************************************************************** * GstUri - GstMiniObject to parse and merge URIs according to IETF RFC 3986 ****************************************************************************/ /** * SECTION:gsturi * @title: GstUri * @short_description: URI parsing and manipulation. * * A #GstUri object can be used to parse and split a URI string into its * constituent parts. Two #GstUri objects can be joined to make a new #GstUri * using the algorithm described in RFC3986. */ /* Definition for GstUri object */ struct _GstUri { /*< private > */ GstMiniObject mini_object; gchar *scheme; gchar *userinfo; gchar *host; guint port; GList *path; GHashTable *query; gchar *fragment; }; GST_DEFINE_MINI_OBJECT_TYPE (GstUri, gst_uri); static GstUri *_gst_uri_copy (const GstUri * uri); static void _gst_uri_free (GstUri * uri); static GstUri *_gst_uri_new (void); static GList *_remove_dot_segments (GList * path); /* private GstUri functions */ static GstUri * _gst_uri_new (void) { GstUri *uri; g_return_val_if_fail (gst_is_initialized (), NULL); uri = GST_URI_CAST (g_slice_new0 (GstUri)); if (uri) gst_mini_object_init (GST_MINI_OBJECT_CAST (uri), 0, gst_uri_get_type (), (GstMiniObjectCopyFunction) _gst_uri_copy, NULL, (GstMiniObjectFreeFunction) _gst_uri_free); return uri; } static void _gst_uri_free (GstUri * uri) { g_return_if_fail (GST_IS_URI (uri)); g_free (uri->scheme); g_free (uri->userinfo); g_free (uri->host); g_list_free_full (uri->path, g_free); if (uri->query) g_hash_table_unref (uri->query); g_free (uri->fragment); #ifdef USE_POISONING memset (uri, 0xff, sizeof (*uri)); #endif g_slice_free1 (sizeof (*uri), uri); } static GHashTable * _gst_uri_copy_query_table (GHashTable * orig) { GHashTable *new = NULL; if (orig != NULL) { GHashTableIter iter; gpointer key, value; new = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); g_hash_table_iter_init (&iter, orig); while (g_hash_table_iter_next (&iter, &key, &value)) { g_hash_table_insert (new, g_strdup (key), g_strdup (value)); } } return new; } static GstUri * _gst_uri_copy (const GstUri * orig_uri) { GstUri *new_uri; g_return_val_if_fail (GST_IS_URI (orig_uri), NULL); new_uri = _gst_uri_new (); if (new_uri) { new_uri->scheme = g_strdup (orig_uri->scheme); new_uri->userinfo = g_strdup (orig_uri->userinfo); new_uri->host = g_strdup (orig_uri->host); new_uri->port = orig_uri->port; new_uri->path = g_list_copy_deep (orig_uri->path, (GCopyFunc) g_strdup, NULL); new_uri->query = _gst_uri_copy_query_table (orig_uri->query); new_uri->fragment = g_strdup (orig_uri->fragment); } return new_uri; } /* * _gst_uri_compare_lists: * * Compare two lists for equality. This compares the two lists, item for item, * comparing items in the same position in the two lists. If @first is * considered less than @second the result will be negative. If @first is * considered to be more than @second then the result will be positive. If the * lists are considered to be equal then the result will be 0. If two lists * have the same items, but one list is shorter than the other, then the * shorter list is considered to be less than the longer list. */ static gint _gst_uri_compare_lists (GList * first, GList * second, GCompareFunc cmp_fn) { GList *itr1, *itr2; gint result; for (itr1 = first, itr2 = second; itr1 != NULL || itr2 != NULL; itr1 = itr1->next, itr2 = itr2->next) { if (itr1 == NULL) return -1; if (itr2 == NULL) return 1; result = cmp_fn (itr1->data, itr2->data); if (result != 0) return result; } return 0; } typedef enum { _GST_URI_NORMALIZE_LOWERCASE = 1, _GST_URI_NORMALIZE_UPPERCASE = 2 } _GstUriNormalizations; /* * Find the first character that hasn't been normalized according to the @flags. */ static gchar * _gst_uri_first_non_normalized_char (gchar * str, guint flags) { gchar *pos; if (str == NULL) return NULL; for (pos = str; *pos; pos++) { if ((flags & _GST_URI_NORMALIZE_UPPERCASE) && g_ascii_islower (*pos)) return pos; if ((flags & _GST_URI_NORMALIZE_LOWERCASE) && g_ascii_isupper (*pos)) return pos; } return NULL; } static gboolean _gst_uri_normalize_lowercase (gchar * str) { gchar *pos; gboolean ret = FALSE; for (pos = _gst_uri_first_non_normalized_char (str, _GST_URI_NORMALIZE_LOWERCASE); pos != NULL; pos = _gst_uri_first_non_normalized_char (pos + 1, _GST_URI_NORMALIZE_LOWERCASE)) { *pos = g_ascii_tolower (*pos); ret = TRUE; } return ret; } #define _gst_uri_normalize_scheme _gst_uri_normalize_lowercase #define _gst_uri_normalize_hostname _gst_uri_normalize_lowercase static gboolean _gst_uri_normalize_path (GList ** path) { GList *new_path; new_path = _remove_dot_segments (*path); if (_gst_uri_compare_lists (new_path, *path, (GCompareFunc) g_strcmp0) != 0) { g_list_free_full (*path, g_free); *path = new_path; return TRUE; } g_list_free_full (new_path, g_free); return FALSE; } static gboolean _gst_uri_normalize_str_noop (gchar * str) { return FALSE; } static gboolean _gst_uri_normalize_table_noop (GHashTable * table) { return FALSE; } #define _gst_uri_normalize_userinfo _gst_uri_normalize_str_noop #define _gst_uri_normalize_query _gst_uri_normalize_table_noop #define _gst_uri_normalize_fragment _gst_uri_normalize_str_noop /* RFC 3986 functions */ static GList * _merge (GList * base, GList * path) { GList *ret, *path_copy, *last; path_copy = g_list_copy_deep (path, (GCopyFunc) g_strdup, NULL); /* if base is NULL make path absolute */ if (base == NULL) { if (path_copy != NULL && path_copy->data != NULL) { path_copy = g_list_prepend (path_copy, NULL); } return path_copy; } ret = g_list_copy_deep (base, (GCopyFunc) g_strdup, NULL); last = g_list_last (ret); ret = g_list_remove_link (ret, last); g_list_free_full (last, g_free); ret = g_list_concat (ret, path_copy); return ret; } static GList * _remove_dot_segments (GList * path) { GList *out, *elem, *next; if (path == NULL) return NULL; out = g_list_copy_deep (path, (GCopyFunc) g_strdup, NULL); for (elem = out; elem; elem = next) { next = elem->next; if (elem->data == NULL && elem != out && next != NULL) { out = g_list_delete_link (out, elem); } else if (g_strcmp0 (elem->data, ".") == 0) { g_free (elem->data); out = g_list_delete_link (out, elem); } else if (g_strcmp0 (elem->data, "..") == 0) { GList *prev = g_list_previous (elem); if (prev && (prev != out || prev->data != NULL)) { g_free (prev->data); out = g_list_delete_link (out, prev); } g_free (elem->data); if (next != NULL) { out = g_list_delete_link (out, elem); } else { /* path ends in '/..' We need to keep the last '/' */ elem->data = NULL; } } } return out; } static gchar * _gst_uri_escape_userinfo (const gchar * userinfo) { return g_uri_escape_string (userinfo, G_URI_RESERVED_CHARS_ALLOWED_IN_USERINFO, FALSE); } static gchar * _gst_uri_escape_host (const gchar * host) { return g_uri_escape_string (host, G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, FALSE); } static gchar * _gst_uri_escape_host_colon (const gchar * host) { return g_uri_escape_string (host, G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS ":", FALSE); } static gchar * _gst_uri_escape_path_segment (const gchar * segment) { return g_uri_escape_string (segment, G_URI_RESERVED_CHARS_ALLOWED_IN_PATH_ELEMENT, FALSE); } static gchar * _gst_uri_escape_http_query_element (const gchar * element) { gchar *ret, *c; ret = g_uri_escape_string (element, "!$'()*,;:@/?= ", FALSE); for (c = ret; *c; c++) if (*c == ' ') *c = '+'; return ret; } static gchar * _gst_uri_escape_fragment (const gchar * fragment) { return g_uri_escape_string (fragment, G_URI_RESERVED_CHARS_ALLOWED_IN_PATH "?", FALSE); } static GList * _gst_uri_string_to_list (const gchar * str, const gchar * sep, gboolean convert, gboolean unescape) { GList *new_list = NULL; if (str) { guint pct_sep_len = 0; gchar *pct_sep = NULL; gchar **split_str; if (convert && !unescape) { pct_sep = g_strdup_printf ("%%%2.2X", (guint) (*sep)); pct_sep_len = 3; } split_str = g_strsplit (str, sep, -1); if (split_str) { gchar **next_elem; for (next_elem = split_str; *next_elem; next_elem += 1) { gchar *elem = *next_elem; if (*elem == '\0') { new_list = g_list_append (new_list, NULL); } else { if (convert && !unescape) { gchar *next_sep; for (next_sep = strcasestr (elem, pct_sep); next_sep; next_sep = strcasestr (next_sep + 1, pct_sep)) { *next_sep = *sep; memmove (next_sep + 1, next_sep + pct_sep_len, strlen (next_sep + pct_sep_len) + 1); } } if (unescape) { *next_elem = g_uri_unescape_string (elem, NULL); g_free (elem); elem = *next_elem; } new_list = g_list_append (new_list, g_strdup (elem)); } } } g_strfreev (split_str); if (convert && !unescape) g_free (pct_sep); } return new_list; } static GHashTable * _gst_uri_string_to_table (const gchar * str, const gchar * part_sep, const gchar * kv_sep, gboolean convert, gboolean unescape) { GHashTable *new_table = NULL; if (str) { gchar *pct_part_sep = NULL, *pct_kv_sep = NULL; gchar **split_parts; new_table = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); if (convert && !unescape) { pct_part_sep = g_strdup_printf ("%%%2.2X", (guint) (*part_sep)); pct_kv_sep = g_strdup_printf ("%%%2.2X", (guint) (*kv_sep)); } split_parts = g_strsplit (str, part_sep, -1); if (split_parts) { gchar **next_part; for (next_part = split_parts; *next_part; next_part += 1) { gchar *part = *next_part; gchar *kv_sep_pos; gchar *key, *value; /* if we are converting percent encoded versions of separators then * substitute the part separator now. */ if (convert && !unescape) { gchar *next_sep; for (next_sep = strcasestr (part, pct_part_sep); next_sep; next_sep = strcasestr (next_sep + 1, pct_part_sep)) { *next_sep = *part_sep; memmove (next_sep + 1, next_sep + 3, strlen (next_sep + 3) + 1); } } /* find the key/value separator within the part */ kv_sep_pos = g_strstr_len (part, -1, kv_sep); if (kv_sep_pos == NULL) { if (unescape) { key = g_uri_unescape_string (part, NULL); } else { key = g_strdup (part); } value = NULL; } else { if (unescape) { key = g_uri_unescape_segment (part, kv_sep_pos, NULL); value = g_uri_unescape_string (kv_sep_pos + 1, NULL); } else { key = g_strndup (part, kv_sep_pos - part); value = g_strdup (kv_sep_pos + 1); } } /* if we are converting percent encoded versions of separators then * substitute the key/value separator in both key and value now. */ if (convert && !unescape) { gchar *next_sep; for (next_sep = strcasestr (key, pct_kv_sep); next_sep; next_sep = strcasestr (next_sep + 1, pct_kv_sep)) { *next_sep = *kv_sep; memmove (next_sep + 1, next_sep + 3, strlen (next_sep + 3) + 1); } if (value) { for (next_sep = strcasestr (value, pct_kv_sep); next_sep; next_sep = strcasestr (next_sep + 1, pct_kv_sep)) { *next_sep = *kv_sep; memmove (next_sep + 1, next_sep + 3, strlen (next_sep + 3) + 1); } } } /* add value to the table */ g_hash_table_insert (new_table, key, value); } } /* tidy up */ g_strfreev (split_parts); if (convert && !unescape) { g_free (pct_part_sep); g_free (pct_kv_sep); } } return new_table; } /* * Method definitions. */ /** * gst_uri_new: * @scheme: (nullable): The scheme for the new URI. * @userinfo: (nullable): The user-info for the new URI. * @host: (nullable): The host name for the new URI. * @port: The port number for the new URI or %GST_URI_NO_PORT. * @path: (nullable): The path for the new URI with '/' separating path * elements. * @query: (nullable): The query string for the new URI with '&' separating * query elements. Elements containing '&' characters * should encode them as "%26". * @fragment: (nullable): The fragment name for the new URI. * * Creates a new #GstUri object with the given URI parts. The path and query * strings will be broken down into their elements. All strings should not be * escaped except where indicated. * * Returns: (transfer full): A new #GstUri object. * * Since: 1.6 */ GstUri * gst_uri_new (const gchar * scheme, const gchar * userinfo, const gchar * host, guint port, const gchar * path, const gchar * query, const gchar * fragment) { GstUri *new_uri; new_uri = _gst_uri_new (); if (new_uri) { new_uri->scheme = g_strdup (scheme); new_uri->userinfo = g_strdup (userinfo); new_uri->host = g_strdup (host); new_uri->port = port; new_uri->path = _gst_uri_string_to_list (path, "/", FALSE, FALSE); new_uri->query = _gst_uri_string_to_table (query, "&", "=", TRUE, FALSE); new_uri->fragment = g_strdup (fragment); } return new_uri; } /** * gst_uri_new_with_base: * @base: (transfer none)(nullable): The base URI to join the new URI to. * @scheme: (nullable): The scheme for the new URI. * @userinfo: (nullable): The user-info for the new URI. * @host: (nullable): The host name for the new URI. * @port: The port number for the new URI or %GST_URI_NO_PORT. * @path: (nullable): The path for the new URI with '/' separating path * elements. * @query: (nullable): The query string for the new URI with '&' separating * query elements. Elements containing '&' characters * should encode them as "%26". * @fragment: (nullable): The fragment name for the new URI. * * Like gst_uri_new(), but joins the new URI onto a base URI. * * Returns: (transfer full): The new URI joined onto @base. * * Since: 1.6 */ GstUri * gst_uri_new_with_base (GstUri * base, const gchar * scheme, const gchar * userinfo, const gchar * host, guint port, const gchar * path, const gchar * query, const gchar * fragment) { GstUri *new_rel_uri; GstUri *new_uri; g_return_val_if_fail (base == NULL || GST_IS_URI (base), NULL); new_rel_uri = gst_uri_new (scheme, userinfo, host, port, path, query, fragment); new_uri = gst_uri_join (base, new_rel_uri); gst_uri_unref (new_rel_uri); return new_uri; } static GstUri * _gst_uri_from_string_internal (const gchar * uri, gboolean unescape) { const gchar *orig_uri = uri; GstUri *uri_obj; uri_obj = _gst_uri_new (); if (uri_obj && uri != NULL) { int i = 0; /* be helpful and skip initial white space */ while (*uri == '\v' || g_ascii_isspace (*uri)) uri++; if (g_ascii_isalpha (uri[i])) { /* find end of scheme name */ i++; while (g_ascii_isalnum (uri[i]) || uri[i] == '+' || uri[i] == '-' || uri[i] == '.') i++; } if (i > 0 && uri[i] == ':') { /* get scheme */ uri_obj->scheme = g_strndup (uri, i); uri += i + 1; } if (uri[0] == '/' && uri[1] == '/') { const gchar *eoa, *eoui, *eoh, *reoh; /* get authority [userinfo@]host[:port] */ uri += 2; /* find end of authority */ eoa = uri + strcspn (uri, "/?#"); /* find end of userinfo */ eoui = strchr (uri, '@'); if (eoui != NULL && eoui < eoa) { if (unescape) uri_obj->userinfo = g_uri_unescape_segment (uri, eoui, NULL); else uri_obj->userinfo = g_strndup (uri, eoui - uri); uri = eoui + 1; } /* find end of host */ if (uri[0] == '[') { eoh = strchr (uri, ']'); if (eoh == NULL || eoh > eoa) { GST_DEBUG ("Unable to parse the host part of the URI '%s'.", orig_uri); gst_uri_unref (uri_obj); return NULL; } reoh = eoh + 1; uri++; } else { reoh = eoh = strchr (uri, ':'); if (eoh == NULL || eoh > eoa) reoh = eoh = eoa; } /* don't capture empty host strings */ if (eoh != uri) { /* always unescape hostname */ uri_obj->host = g_uri_unescape_segment (uri, eoh, NULL); } uri = reoh; if (uri < eoa) { /* if port number is malformed then we can't parse this */ if (uri[0] != ':' || strspn (uri + 1, "0123456789") != eoa - uri - 1) { GST_DEBUG ("Unable to parse host/port part of the URI '%s'.", orig_uri); gst_uri_unref (uri_obj); return NULL; } /* otherwise treat port as unsigned decimal number */ uri++; while (uri < eoa) { uri_obj->port = uri_obj->port * 10 + g_ascii_digit_value (*uri); uri++; } } uri = eoa; } if (uri != NULL && uri[0] != '\0') { /* get path */ size_t len; len = strcspn (uri, "?#"); if (uri[len] == '\0') { uri_obj->path = _gst_uri_string_to_list (uri, "/", FALSE, TRUE); uri = NULL; } else { if (len > 0) { gchar *path_str = g_strndup (uri, len); uri_obj->path = _gst_uri_string_to_list (path_str, "/", FALSE, TRUE); g_free (path_str); } uri += len; } } if (uri != NULL && uri[0] == '?') { /* get query */ gchar *eoq; eoq = strchr (++uri, '#'); if (eoq == NULL) { uri_obj->query = _gst_uri_string_to_table (uri, "&", "=", TRUE, TRUE); uri = NULL; } else { if (eoq != uri) { gchar *query_str = g_strndup (uri, eoq - uri); uri_obj->query = _gst_uri_string_to_table (query_str, "&", "=", TRUE, TRUE); g_free (query_str); } uri = eoq; } } if (uri != NULL && uri[0] == '#') { if (unescape) uri_obj->fragment = g_uri_unescape_string (uri + 1, NULL); else uri_obj->fragment = g_strdup (uri + 1); } } return uri_obj; } /** * gst_uri_from_string: * @uri: The URI string to parse. * * Parses a URI string into a new #GstUri object. Will return NULL if the URI * cannot be parsed. * * Returns: (transfer full) (nullable): A new #GstUri object, or NULL. * * Since: 1.6 */ GstUri * gst_uri_from_string (const gchar * uri) { return _gst_uri_from_string_internal (uri, TRUE); } /** * gst_uri_from_string_escaped: * @uri: The URI string to parse. * * Parses a URI string into a new #GstUri object. Will return NULL if the URI * cannot be parsed. This is identical to gst_uri_from_string() except that * the userinfo and fragment components of the URI will not be unescaped while * parsing. * * Use this when you need to extract a username and password from the userinfo * such as https://user:password@example.com since either may contain * a URI-escaped ':' character. gst_uri_from_string() will unescape the entire * userinfo component, which will make it impossible to know which ':' * delineates the username and password. * * The same applies to the fragment component of the URI, such as * https://example.com/path#fragment which may contain a URI-escaped '#'. * * Returns: (transfer full) (nullable): A new #GstUri object, or NULL. * * Since: 1.18 */ GstUri * gst_uri_from_string_escaped (const gchar * uri) { return _gst_uri_from_string_internal (uri, FALSE); } /** * gst_uri_from_string_with_base: * @base: (transfer none)(nullable): The base URI to join the new URI with. * @uri: The URI string to parse. * * Like gst_uri_from_string() but also joins with a base URI. * * Returns: (transfer full): A new #GstUri object. * * Since: 1.6 */ GstUri * gst_uri_from_string_with_base (GstUri * base, const gchar * uri) { GstUri *new_rel_uri; GstUri *new_uri; g_return_val_if_fail (base == NULL || GST_IS_URI (base), NULL); new_rel_uri = gst_uri_from_string (uri); new_uri = gst_uri_join (base, new_rel_uri); gst_uri_unref (new_rel_uri); return new_uri; } /** * gst_uri_equal: * @first: First #GstUri to compare. * @second: Second #GstUri to compare. * * Compares two #GstUri objects to see if they represent the same normalized * URI. * * Returns: %TRUE if the normalized versions of the two URI's would be equal. * * Since: 1.6 */ gboolean gst_uri_equal (const GstUri * first, const GstUri * second) { gchar *first_norm = NULL, *second_norm = NULL; GList *first_norm_list = NULL, *second_norm_list = NULL; const gchar *first_cmp, *second_cmp; GHashTableIter table_iter; gpointer key, value; int result; g_return_val_if_fail ((first == NULL || GST_IS_URI (first)) && (second == NULL || GST_IS_URI (second)), FALSE); if (first == second) return TRUE; if (first == NULL || second == NULL) return FALSE; if (first->port != second->port) return FALSE; /* work out a version of field value (normalized or not) to compare. * first_cmp, second_cmp will be the values to compare later. * first_norm, second_norm will be non-NULL if normalized versions are used, * and need to be freed later. */ #define GST_URI_NORMALIZED_FIELD(pos, field, norm_fn, flags) \ pos##_cmp = pos->field; \ if (_gst_uri_first_non_normalized_char ((gchar*)pos##_cmp, flags) != NULL) { \ pos##_norm = g_strdup (pos##_cmp); \ norm_fn (pos##_norm); \ pos##_cmp = pos##_norm; \ } /* compare two string values, normalizing if needed */ #define GST_URI_NORMALIZED_CMP_STR(field, norm_fn, flags) \ GST_URI_NORMALIZED_FIELD (first, field, norm_fn, flags) \ GST_URI_NORMALIZED_FIELD (second, field, norm_fn, flags) \ result = g_strcmp0 (first_cmp, second_cmp); \ g_free (first_norm); \ first_norm = NULL; \ g_free (second_norm); \ second_norm = NULL; \ if (result != 0) return FALSE /* compare two string values */ #define GST_URI_CMP_STR(field) \ if (g_strcmp0 (first->field, second->field) != 0) return FALSE /* compare two GLists, normalize lists if needed before comparison */ #define GST_URI_NORMALIZED_CMP_LIST(field, norm_fn, copy_fn, cmp_fn, free_fn) \ first_norm_list = g_list_copy_deep (first->field, (GCopyFunc) copy_fn, NULL); \ norm_fn (&first_norm_list); \ second_norm_list = g_list_copy_deep (second->field, (GCopyFunc) copy_fn, NULL); \ norm_fn (&second_norm_list); \ result = _gst_uri_compare_lists (first_norm_list, second_norm_list, (GCompareFunc) cmp_fn); \ g_list_free_full (first_norm_list, free_fn); \ g_list_free_full (second_norm_list, free_fn); \ if (result != 0) return FALSE GST_URI_CMP_STR (userinfo); GST_URI_CMP_STR (fragment); GST_URI_NORMALIZED_CMP_STR (scheme, _gst_uri_normalize_scheme, _GST_URI_NORMALIZE_LOWERCASE); GST_URI_NORMALIZED_CMP_STR (host, _gst_uri_normalize_hostname, _GST_URI_NORMALIZE_LOWERCASE); GST_URI_NORMALIZED_CMP_LIST (path, _gst_uri_normalize_path, g_strdup, g_strcmp0, g_free); if (first->query == NULL && second->query != NULL) return FALSE; if (first->query != NULL && second->query == NULL) return FALSE; if (first->query != NULL) { if (g_hash_table_size (first->query) != g_hash_table_size (second->query)) return FALSE; g_hash_table_iter_init (&table_iter, first->query); while (g_hash_table_iter_next (&table_iter, &key, &value)) { if (!g_hash_table_contains (second->query, key)) return FALSE; result = g_strcmp0 (g_hash_table_lookup (second->query, key), value); if (result != 0) return FALSE; } } #undef GST_URI_NORMALIZED_CMP_STR #undef GST_URI_CMP_STR #undef GST_URI_NORMALIZED_CMP_LIST #undef GST_URI_NORMALIZED_FIELD return TRUE; } /** * gst_uri_join: * @base_uri: (transfer none) (nullable): The base URI to join another to. * @ref_uri: (transfer none) (nullable): The reference URI to join onto the * base URI. * * Join a reference URI onto a base URI using the method from RFC 3986. * If either URI is %NULL then the other URI will be returned with the ref count * increased. * * Returns: (transfer full) (nullable): A #GstUri which represents the base * with the reference URI joined on. * * Since: 1.6 */ GstUri * gst_uri_join (GstUri * base_uri, GstUri * ref_uri) { const gchar *r_scheme; GstUri *t; g_return_val_if_fail ((base_uri == NULL || GST_IS_URI (base_uri)) && (ref_uri == NULL || GST_IS_URI (ref_uri)), NULL); if (base_uri == NULL && ref_uri == NULL) return NULL; if (base_uri == NULL) { g_return_val_if_fail (GST_IS_URI (ref_uri), NULL); return gst_uri_ref (ref_uri); } if (ref_uri == NULL) { g_return_val_if_fail (GST_IS_URI (base_uri), NULL); return gst_uri_ref (base_uri); } g_return_val_if_fail (GST_IS_URI (base_uri) && GST_IS_URI (ref_uri), NULL); t = _gst_uri_new (); if (t == NULL) return t; /* process according to RFC3986 */ r_scheme = ref_uri->scheme; if (r_scheme != NULL && g_strcmp0 (base_uri->scheme, r_scheme) == 0) { r_scheme = NULL; } if (r_scheme != NULL) { t->scheme = g_strdup (r_scheme); t->userinfo = g_strdup (ref_uri->userinfo); t->host = g_strdup (ref_uri->host); t->port = ref_uri->port; t->path = _remove_dot_segments (ref_uri->path); t->query = _gst_uri_copy_query_table (ref_uri->query); } else { if (ref_uri->host != NULL) { t->userinfo = g_strdup (ref_uri->userinfo); t->host = g_strdup (ref_uri->host); t->port = ref_uri->port; t->path = _remove_dot_segments (ref_uri->path); t->query = _gst_uri_copy_query_table (ref_uri->query); } else { if (ref_uri->path == NULL) { t->path = g_list_copy_deep (base_uri->path, (GCopyFunc) g_strdup, NULL); if (ref_uri->query != NULL) t->query = _gst_uri_copy_query_table (ref_uri->query); else t->query = _gst_uri_copy_query_table (base_uri->query); } else { if (ref_uri->path->data == NULL) t->path = _remove_dot_segments (ref_uri->path); else { GList *mrgd = _merge (base_uri->path, ref_uri->path); t->path = _remove_dot_segments (mrgd); g_list_free_full (mrgd, g_free); } t->query = _gst_uri_copy_query_table (ref_uri->query); } t->userinfo = g_strdup (base_uri->userinfo); t->host = g_strdup (base_uri->host); t->port = base_uri->port; } t->scheme = g_strdup (base_uri->scheme); } t->fragment = g_strdup (ref_uri->fragment); return t; } /** * gst_uri_join_strings: * @base_uri: The percent-encoded base URI. * @ref_uri: The percent-encoded reference URI to join to the @base_uri. * * This is a convenience function to join two URI strings and return the result. * The returned string should be g_free()'d after use. * * Returns: (transfer full): A string representing the percent-encoded join of * the two URIs. * * Since: 1.6 */ gchar * gst_uri_join_strings (const gchar * base_uri, const gchar * ref_uri) { GstUri *base, *result; gchar *result_uri; base = gst_uri_from_string (base_uri); result = gst_uri_from_string_with_base (base, ref_uri); result_uri = gst_uri_to_string (result); gst_uri_unref (base); gst_uri_unref (result); return result_uri; } /** * gst_uri_is_writable: * @uri: The #GstUri object to test. * * Check if it is safe to write to this #GstUri. * * Check if the refcount of @uri is exactly 1, meaning that no other * reference exists to the #GstUri and that the #GstUri is therefore writable. * * Modification of a #GstUri should only be done after verifying that it is * writable. * * Returns: %TRUE if it is safe to write to the object. * * Since: 1.6 */ gboolean gst_uri_is_writable (const GstUri * uri) { g_return_val_if_fail (GST_IS_URI (uri), FALSE); return gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (uri)); } /** * gst_uri_make_writable: * @uri: (transfer full): The #GstUri object to make writable. * * Make the #GstUri writable. * * Checks if @uri is writable, and if so the original object is returned. If * not, then a writable copy is made and returned. This gives away the * reference to @uri and returns a reference to the new #GstUri. * If @uri is %NULL then %NULL is returned. * * Returns: (transfer full): A writable version of @uri. * * Since: 1.6 */ GstUri * gst_uri_make_writable (GstUri * uri) { g_return_val_if_fail (GST_IS_URI (uri), NULL); return GST_URI_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (uri))); } /** * gst_uri_to_string: * @uri: This #GstUri to convert to a string. * * Convert the URI to a string. * * Returns the URI as held in this object as a #gchar* nul-terminated string. * The caller should g_free() the string once they are finished with it. * The string is put together as described in RFC 3986. * * Returns: (transfer full): The string version of the URI. * * Since: 1.6 */ gchar * gst_uri_to_string (const GstUri * uri) { GString *uri_str; gchar *escaped; g_return_val_if_fail (GST_IS_URI (uri), NULL); uri_str = g_string_new (NULL); if (uri->scheme != NULL) g_string_append_printf (uri_str, "%s:", uri->scheme); if (uri->userinfo != NULL || uri->host != NULL || uri->port != GST_URI_NO_PORT) g_string_append (uri_str, "//"); if (uri->userinfo != NULL) { escaped = _gst_uri_escape_userinfo (uri->userinfo); g_string_append_printf (uri_str, "%s@", escaped); g_free (escaped); } if (uri->host != NULL) { if (strchr (uri->host, ':') != NULL) { escaped = _gst_uri_escape_host_colon (uri->host); g_string_append_printf (uri_str, "[%s]", escaped); g_free (escaped); } else { escaped = _gst_uri_escape_host (uri->host); g_string_append (uri_str, escaped); g_free (escaped); } } if (uri->port != GST_URI_NO_PORT) g_string_append_printf (uri_str, ":%u", uri->port); if (uri->path != NULL) { escaped = gst_uri_get_path_string (uri); g_string_append (uri_str, escaped); g_free (escaped); } if (uri->query) { g_string_append (uri_str, "?"); escaped = gst_uri_get_query_string (uri); g_string_append (uri_str, escaped); g_free (escaped); } if (uri->fragment != NULL) { escaped = _gst_uri_escape_fragment (uri->fragment); g_string_append_printf (uri_str, "#%s", escaped); g_free (escaped); } return g_string_free (uri_str, FALSE); } /** * gst_uri_is_normalized: * @uri: The #GstUri to test to see if it is normalized. * * Tests the @uri to see if it is normalized. A %NULL @uri is considered to be * normalized. * * Returns: TRUE if the URI is normalized or is %NULL. * * Since: 1.6 */ gboolean gst_uri_is_normalized (const GstUri * uri) { GList *new_path; gboolean ret; if (uri == NULL) return TRUE; g_return_val_if_fail (GST_IS_URI (uri), FALSE); /* check for non-normalized characters in uri parts */ if (_gst_uri_first_non_normalized_char (uri->scheme, _GST_URI_NORMALIZE_LOWERCASE) != NULL || /*_gst_uri_first_non_normalized_char (uri->userinfo, _GST_URI_NORMALIZE_PERCENTAGES) != NULL || */ _gst_uri_first_non_normalized_char (uri->host, _GST_URI_NORMALIZE_LOWERCASE /*| _GST_URI_NORMALIZE_PERCENTAGES */ ) != NULL /*|| _gst_uri_first_non_normalized_char (uri->path, _GST_URI_NORMALIZE_PERCENTAGES) != NULL || _gst_uri_first_non_normalized_char (uri->query, _GST_URI_NORMALIZE_PERCENTAGES) != NULL || _gst_uri_first_non_normalized_char (uri->fragment, _GST_URI_NORMALIZE_PERCENTAGES) != NULL */ ) return FALSE; /* also check path has had dot segments removed */ new_path = _remove_dot_segments (uri->path); ret = (_gst_uri_compare_lists (new_path, uri->path, (GCompareFunc) g_strcmp0) == 0); g_list_free_full (new_path, g_free); return ret; } /** * gst_uri_normalize: * @uri: (transfer none): The #GstUri to normalize. * * Normalization will remove extra path segments ("." and "..") from the URI. It * will also convert the scheme and host name to lower case and any * percent-encoded values to uppercase. * * The #GstUri object must be writable. Check with gst_uri_is_writable() or use * gst_uri_make_writable() first. * * Returns: TRUE if the URI was modified. * * Since: 1.6 */ gboolean gst_uri_normalize (GstUri * uri) { g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); return _gst_uri_normalize_scheme (uri->scheme) | _gst_uri_normalize_userinfo (uri->userinfo) | _gst_uri_normalize_hostname (uri->host) | _gst_uri_normalize_path (&uri->path) | _gst_uri_normalize_query (uri->query) | _gst_uri_normalize_fragment (uri->fragment); } /** * gst_uri_get_scheme: * @uri: (nullable): This #GstUri object. * * Get the scheme name from the URI or %NULL if it doesn't exist. * If @uri is %NULL then returns %NULL. * * Returns: (nullable): The scheme from the #GstUri object or %NULL. */ const gchar * gst_uri_get_scheme (const GstUri * uri) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), NULL); return (uri ? uri->scheme : NULL); } /** * gst_uri_set_scheme: * @uri: (transfer none)(nullable): The #GstUri to modify. * @scheme: The new scheme to set or %NULL to unset the scheme. * * Set or unset the scheme for the URI. * * Returns: %TRUE if the scheme was set/unset successfully. * * Since: 1.6 */ gboolean gst_uri_set_scheme (GstUri * uri, const gchar * scheme) { if (!uri) return scheme == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); g_free (uri->scheme); uri->scheme = g_strdup (scheme); return TRUE; } /** * gst_uri_get_userinfo: * @uri: (nullable): This #GstUri object. * * Get the userinfo (usually in the form "username:password") from the URI * or %NULL if it doesn't exist. If @uri is %NULL then returns %NULL. * * Returns: (nullable): The userinfo from the #GstUri object or %NULL. * * Since: 1.6 */ const gchar * gst_uri_get_userinfo (const GstUri * uri) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), NULL); return (uri ? uri->userinfo : NULL); } /** * gst_uri_set_userinfo: * @uri: (transfer none)(nullable): The #GstUri to modify. * @userinfo: The new user-information string to set or %NULL to unset. * * Set or unset the user information for the URI. * * Returns: %TRUE if the user information was set/unset successfully. * * Since: 1.6 */ gboolean gst_uri_set_userinfo (GstUri * uri, const gchar * userinfo) { if (!uri) return userinfo == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); g_free (uri->userinfo); uri->userinfo = g_strdup (userinfo); return TRUE; } /** * gst_uri_get_host: * @uri: (nullable): This #GstUri object. * * Get the host name from the URI or %NULL if it doesn't exist. * If @uri is %NULL then returns %NULL. * * Returns: (nullable): The host name from the #GstUri object or %NULL. * * Since: 1.6 */ const gchar * gst_uri_get_host (const GstUri * uri) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), NULL); return (uri ? uri->host : NULL); } /** * gst_uri_set_host: * @uri: (transfer none)(nullable): The #GstUri to modify. * @host: The new host string to set or %NULL to unset. * * Set or unset the host for the URI. * * Returns: %TRUE if the host was set/unset successfully. * * Since: 1.6 */ gboolean gst_uri_set_host (GstUri * uri, const gchar * host) { if (!uri) return host == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); g_free (uri->host); uri->host = g_strdup (host); return TRUE; } /** * gst_uri_get_port: * @uri: (nullable): This #GstUri object. * * Get the port number from the URI or %GST_URI_NO_PORT if it doesn't exist. * If @uri is %NULL then returns %GST_URI_NO_PORT. * * Returns: The port number from the #GstUri object or %GST_URI_NO_PORT. * * Since: 1.6 */ guint gst_uri_get_port (const GstUri * uri) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), GST_URI_NO_PORT); return (uri ? uri->port : GST_URI_NO_PORT); } /** * gst_uri_set_port: * @uri: (transfer none)(nullable): The #GstUri to modify. * @port: The new port number to set or %GST_URI_NO_PORT to unset. * * Set or unset the port number for the URI. * * Returns: %TRUE if the port number was set/unset successfully. * * Since: 1.6 */ gboolean gst_uri_set_port (GstUri * uri, guint port) { if (!uri) return port == GST_URI_NO_PORT; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); uri->port = port; return TRUE; } /** * gst_uri_get_path: * @uri: The #GstUri to get the path from. * * Extract the path string from the URI object. * * Returns: (transfer full) (nullable): The path from the URI. Once finished * with the string should be g_free()'d. * * Since: 1.6 */ gchar * gst_uri_get_path (const GstUri * uri) { GList *path_segment; const gchar *sep = ""; GString *ret; if (!uri) return NULL; g_return_val_if_fail (GST_IS_URI (uri), NULL); if (!uri->path) return NULL; ret = g_string_new (NULL); for (path_segment = uri->path; path_segment; path_segment = path_segment->next) { g_string_append (ret, sep); if (path_segment->data) { g_string_append (ret, path_segment->data); } sep = "/"; } return g_string_free (ret, FALSE); } /** * gst_uri_set_path: * @uri: (transfer none) (nullable): The #GstUri to modify. * @path: The new path to set with path segments separated by '/', or use %NULL * to unset the path. * * Sets or unsets the path in the URI. * * Returns: %TRUE if the path was set successfully. * * Since: 1.6 */ gboolean gst_uri_set_path (GstUri * uri, const gchar * path) { if (!uri) return path == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); g_list_free_full (uri->path, g_free); uri->path = _gst_uri_string_to_list (path, "/", FALSE, FALSE); return TRUE; } /** * gst_uri_get_path_string: * @uri: The #GstUri to get the path from. * * Extract the path string from the URI object as a percent encoded URI path. * * Returns: (transfer full) (nullable): The path from the URI. Once finished * with the string should be g_free()'d. * * Since: 1.6 */ gchar * gst_uri_get_path_string (const GstUri * uri) { GList *path_segment; const gchar *sep = ""; GString *ret; gchar *escaped; if (!uri) return NULL; g_return_val_if_fail (GST_IS_URI (uri), NULL); if (!uri->path) return NULL; ret = g_string_new (NULL); for (path_segment = uri->path; path_segment; path_segment = path_segment->next) { g_string_append (ret, sep); if (path_segment->data) { escaped = _gst_uri_escape_path_segment (path_segment->data); g_string_append (ret, escaped); g_free (escaped); } sep = "/"; } return g_string_free (ret, FALSE); } /** * gst_uri_set_path_string: * @uri: (transfer none)(nullable): The #GstUri to modify. * @path: The new percent encoded path to set with path segments separated by * '/', or use %NULL to unset the path. * * Sets or unsets the path in the URI. * * Returns: %TRUE if the path was set successfully. * * Since: 1.6 */ gboolean gst_uri_set_path_string (GstUri * uri, const gchar * path) { if (!uri) return path == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); g_list_free_full (uri->path, g_free); uri->path = _gst_uri_string_to_list (path, "/", FALSE, TRUE); return TRUE; } /** * gst_uri_get_path_segments: * @uri: (nullable): The #GstUri to get the path from. * * Get a list of path segments from the URI. * * Returns: (transfer full) (element-type gchar*): A #GList of path segment * strings or %NULL if no path segments are available. Free the list * when no longer needed with g_list_free_full(list, g_free). * * Since: 1.6 */ GList * gst_uri_get_path_segments (const GstUri * uri) { GList *ret = NULL; g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), NULL); if (uri) { ret = g_list_copy_deep (uri->path, (GCopyFunc) g_strdup, NULL); } return ret; } /** * gst_uri_set_path_segments: * @uri: (transfer none)(nullable): The #GstUri to modify. * @path_segments: (transfer full)(nullable)(element-type gchar*): The new * path list to set. * * Replace the path segments list in the URI. * * Returns: %TRUE if the path segments were set successfully. * * Since: 1.6 */ gboolean gst_uri_set_path_segments (GstUri * uri, GList * path_segments) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), FALSE); if (!uri) { if (path_segments) g_list_free_full (path_segments, g_free); return path_segments == NULL; } g_return_val_if_fail (gst_uri_is_writable (uri), FALSE); g_list_free_full (uri->path, g_free); uri->path = path_segments; return TRUE; } /** * gst_uri_append_path: * @uri: (transfer none)(nullable): The #GstUri to modify. * @relative_path: Relative path to append to the end of the current path. * * Append a path onto the end of the path in the URI. The path is not * normalized, call #gst_uri_normalize() to normalize the path. * * Returns: %TRUE if the path was appended successfully. * * Since: 1.6 */ gboolean gst_uri_append_path (GstUri * uri, const gchar * relative_path) { GList *rel_path_list; if (!uri) return relative_path == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); if (!relative_path) return TRUE; if (uri->path) { GList *last_elem = g_list_last (uri->path); if (last_elem->data == NULL) { uri->path = g_list_delete_link (uri->path, last_elem); } } rel_path_list = _gst_uri_string_to_list (relative_path, "/", FALSE, FALSE); /* if path was absolute, make it relative by removing initial NULL element */ if (rel_path_list && rel_path_list->data == NULL) { rel_path_list = g_list_delete_link (rel_path_list, rel_path_list); } uri->path = g_list_concat (uri->path, rel_path_list); return TRUE; } /** * gst_uri_append_path_segment: * @uri: (transfer none)(nullable): The #GstUri to modify. * @path_segment: The path segment string to append to the URI path. * * Append a single path segment onto the end of the URI path. * * Returns: %TRUE if the path was appended successfully. * * Since: 1.6 */ gboolean gst_uri_append_path_segment (GstUri * uri, const gchar * path_segment) { if (!uri) return path_segment == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); if (!path_segment) return TRUE; /* if base path ends in a directory (i.e. last element is NULL), remove it */ if (uri->path && g_list_last (uri->path)->data == NULL) { uri->path = g_list_delete_link (uri->path, g_list_last (uri->path)); } uri->path = g_list_append (uri->path, g_strdup (path_segment)); return TRUE; } /** * gst_uri_get_query_string: * @uri: (nullable): The #GstUri to get the query string from. * * Get a percent encoded URI query string from the @uri. * * Returns: (transfer full) (nullable): A percent encoded query string. Use * g_free() when no longer needed. * * Since: 1.6 */ gchar * gst_uri_get_query_string (const GstUri * uri) { GHashTableIter iter; gpointer key, value; const gchar *sep = ""; gchar *escaped; GString *ret; if (!uri) return NULL; g_return_val_if_fail (GST_IS_URI (uri), NULL); if (!uri->query) return NULL; ret = g_string_new (NULL); g_hash_table_iter_init (&iter, uri->query); while (g_hash_table_iter_next (&iter, &key, &value)) { g_string_append (ret, sep); escaped = _gst_uri_escape_http_query_element (key); g_string_append (ret, escaped); g_free (escaped); if (value) { escaped = _gst_uri_escape_http_query_element (value); g_string_append_printf (ret, "=%s", escaped); g_free (escaped); } sep = "&"; } return g_string_free (ret, FALSE); } /** * gst_uri_set_query_string: * @uri: (transfer none)(nullable): The #GstUri to modify. * @query: The new percent encoded query string to use to populate the query * table, or use %NULL to unset the query table. * * Sets or unsets the query table in the URI. * * Returns: %TRUE if the query table was set successfully. * * Since: 1.6 */ gboolean gst_uri_set_query_string (GstUri * uri, const gchar * query) { if (!uri) return query == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); if (uri->query) g_hash_table_unref (uri->query); uri->query = _gst_uri_string_to_table (query, "&", "=", TRUE, TRUE); return TRUE; } /** * gst_uri_get_query_table: * @uri: (nullable): The #GstUri to get the query table from. * * Get the query table from the URI. Keys and values in the table are freed * with g_free when they are deleted. A value may be %NULL to indicate that * the key should appear in the query string in the URI, but does not have a * value. Free the returned #GHashTable with #g_hash_table_unref() when it is * no longer required. Modifying this hash table will modify the query in the * URI. * * Returns: (transfer full) (element-type gchar* gchar*) (nullable): The query * hash table from the URI. * * Since: 1.6 */ GHashTable * gst_uri_get_query_table (const GstUri * uri) { if (!uri) return NULL; g_return_val_if_fail (GST_IS_URI (uri), NULL); if (!uri->query) return NULL; return g_hash_table_ref (uri->query); } /** * gst_uri_set_query_table: * @uri: (transfer none)(nullable): The #GstUri to modify. * @query_table: (transfer none)(nullable)(element-type gchar* gchar*): The new * query table to use. * * Set the query table to use in the URI. The old table is unreferenced and a * reference to the new one is used instead. A value if %NULL for @query_table * will remove the query string from the URI. * * Returns: %TRUE if the new table was successfully used for the query table. * * Since: 1.6 */ gboolean gst_uri_set_query_table (GstUri * uri, GHashTable * query_table) { GHashTable *old_table = NULL; if (!uri) return query_table == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); old_table = uri->query; if (query_table) uri->query = g_hash_table_ref (query_table); else uri->query = NULL; if (old_table) g_hash_table_unref (old_table); return TRUE; } /** * gst_uri_set_query_value: * @uri: (transfer none)(nullable): The #GstUri to modify. * @query_key: (transfer none): The key for the query entry. * @query_value: (transfer none)(nullable): The value for the key. * * This inserts or replaces a key in the query table. A @query_value of %NULL * indicates that the key has no associated value, but will still be present in * the query string. * * Returns: %TRUE if the query table was successfully updated. * * Since: 1.6 */ gboolean gst_uri_set_query_value (GstUri * uri, const gchar * query_key, const gchar * query_value) { if (!uri) return FALSE; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); if (!uri->query) { uri->query = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); } g_hash_table_insert (uri->query, g_strdup (query_key), g_strdup (query_value)); return TRUE; } /** * gst_uri_remove_query_key: * @uri: (transfer none)(nullable): The #GstUri to modify. * @query_key: The key to remove. * * Remove an entry from the query table by key. * * Returns: %TRUE if the key existed in the table and was removed. * * Since: 1.6 */ gboolean gst_uri_remove_query_key (GstUri * uri, const gchar * query_key) { gboolean result; if (!uri) return FALSE; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); if (!uri->query) return FALSE; result = g_hash_table_remove (uri->query, query_key); /* if this was the last query entry, remove the query string completely */ if (result && g_hash_table_size (uri->query) == 0) { g_hash_table_unref (uri->query); uri->query = NULL; } return result; } /** * gst_uri_query_has_key: * @uri: (nullable): The #GstUri to examine. * @query_key: The key to lookup. * * Check if there is a query table entry for the @query_key key. * * Returns: %TRUE if @query_key exists in the URI query table. * * Since: 1.6 */ gboolean gst_uri_query_has_key (const GstUri * uri, const gchar * query_key) { if (!uri) return FALSE; g_return_val_if_fail (GST_IS_URI (uri), FALSE); if (!uri->query) return FALSE; return g_hash_table_contains (uri->query, query_key); } /** * gst_uri_get_query_value: * @uri: (nullable): The #GstUri to examine. * @query_key: The key to lookup. * * Get the value associated with the @query_key key. Will return %NULL if the * key has no value or if the key does not exist in the URI query table. Because * %NULL is returned for both missing keys and keys with no value, you should * use gst_uri_query_has_key() to determine if a key is present in the URI * query. * * Returns: (nullable): The value for the given key, or %NULL if not found. * * Since: 1.6 */ const gchar * gst_uri_get_query_value (const GstUri * uri, const gchar * query_key) { if (!uri) return NULL; g_return_val_if_fail (GST_IS_URI (uri), NULL); if (!uri->query) return NULL; return g_hash_table_lookup (uri->query, query_key); } /** * gst_uri_get_query_keys: * @uri: (nullable): The #GstUri to examine. * * Get a list of the query keys from the URI. * * Returns: (transfer container) (element-type gchar*): A list of keys from * the URI query. Free the list with g_list_free(). * * Since: 1.6 */ GList * gst_uri_get_query_keys (const GstUri * uri) { if (!uri) return NULL; g_return_val_if_fail (GST_IS_URI (uri), NULL); if (!uri->query) return NULL; return g_hash_table_get_keys (uri->query); } /** * gst_uri_get_fragment: * @uri: (nullable): This #GstUri object. * * Get the fragment name from the URI or %NULL if it doesn't exist. * If @uri is %NULL then returns %NULL. * * Returns: (nullable): The host name from the #GstUri object or %NULL. * * Since: 1.6 */ const gchar * gst_uri_get_fragment (const GstUri * uri) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), NULL); return (uri ? uri->fragment : NULL); } /** * gst_uri_set_fragment: * @uri: (transfer none)(nullable): The #GstUri to modify. * @fragment: (nullable): The fragment string to set. * * Sets the fragment string in the URI. Use a value of %NULL in @fragment to * unset the fragment string. * * Returns: %TRUE if the fragment was set/unset successfully. * * Since: 1.6 */ gboolean gst_uri_set_fragment (GstUri * uri, const gchar * fragment) { if (!uri) return fragment == NULL; g_return_val_if_fail (GST_IS_URI (uri) && gst_uri_is_writable (uri), FALSE); g_free (uri->fragment); uri->fragment = g_strdup (fragment); return TRUE; } /** * gst_uri_get_media_fragment_table: * @uri: (nullable): The #GstUri to get the fragment table from. * * Get the media fragment table from the URI, as defined by "Media Fragments URI 1.0". * Hash table returned by this API is a list of "key-value" pairs, and the each * pair is generated by splitting "URI fragment" per "&" sub-delims, then "key" * and "value" are split by "=" sub-delims. The "key" returned by this API may * be undefined keyword by standard. * A value may be %NULL to indicate that the key should appear in the fragment * string in the URI, but does not have a value. Free the returned #GHashTable * with #g_hash_table_unref() when it is no longer required. * Modifying this hash table does not affect the fragment in the URI. * * See more about Media Fragments URI 1.0 (W3C) at https://www.w3.org/TR/media-frags/ * * Returns: (transfer full) (element-type gchar* gchar*) (nullable): The * fragment hash table from the URI. * * Since: 1.12 */ GHashTable * gst_uri_get_media_fragment_table (const GstUri * uri) { g_return_val_if_fail (uri == NULL || GST_IS_URI (uri), NULL); if (!uri->fragment) return NULL; return _gst_uri_string_to_table (uri->fragment, "&", "=", TRUE, TRUE); } /** * gst_uri_copy: * @uri: This #GstUri object. * * Create a new #GstUri object with the same data as this #GstUri object. * If @uri is %NULL then returns %NULL. * * Returns: (transfer full): A new #GstUri object which is a copy of this * #GstUri or %NULL. * * Since: 1.6 */ GstUri * gst_uri_copy (const GstUri * uri) { return GST_URI_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (uri))); } /** * gst_uri_ref: * @uri: (transfer none): This #GstUri object. * * Add a reference to this #GstUri object. See gst_mini_object_ref() for further * info. * * Returns: This object with the reference count incremented. * * Since: 1.6 */ GstUri * gst_uri_ref (GstUri * uri) { return GST_URI_CAST (gst_mini_object_ref (GST_MINI_OBJECT_CAST (uri))); } /** * gst_uri_unref: * @uri: (transfer full): This #GstUri object. * * Decrement the reference count to this #GstUri object. * * If the reference count drops to 0 then finalize this object. * * See gst_mini_object_unref() for further info. * * Since: 1.6 */ void gst_uri_unref (GstUri * uri) { gst_mini_object_unref (GST_MINI_OBJECT_CAST (uri)); } /** * gst_clear_uri: (skip) * @uri_ptr: a pointer to a #GstUri reference * * Clears a reference to a #GstUri. * * @uri_ptr must not be %NULL. * * If the reference is %NULL then this function does nothing. Otherwise, the * reference count of the uri is decreased and the pointer is set to %NULL. * * Since: 1.18 */ void gst_clear_uri (GstUri ** uri_ptr) { gst_clear_mini_object ((GstMiniObject **) uri_ptr); }