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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
*
* Copyright (C) 2014 Colin Walters <walters@verbum.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "ostree-metalink.h"
#include "otutil.h"
#include "libgsystem.h"
typedef enum {
OSTREE_METALINK_STATE_INITIAL,
OSTREE_METALINK_STATE_METALINK,
OSTREE_METALINK_STATE_FILES,
OSTREE_METALINK_STATE_FILE,
OSTREE_METALINK_STATE_SIZE,
OSTREE_METALINK_STATE_VERIFICATION,
OSTREE_METALINK_STATE_HASH,
OSTREE_METALINK_STATE_RESOURCES,
OSTREE_METALINK_STATE_URL,
OSTREE_METALINK_STATE_PASSTHROUGH, /* Ignoring unknown elements */
OSTREE_METALINK_STATE_ERROR
} OstreeMetalinkState;
struct OstreeMetalink
{
GObject parent_instance;
OstreeMetalink *fetcher;
guint passthrough_depth;
OstreeMetalinkState passthrough_previous;
char *file_name;
guint64 size;
guint verification_known :1;
GChecksumType verification_type;
char *verification_value;
GPtrArray *urls;
OstreeMetalinkState state;
};
G_DEFINE_TYPE (OstreeMetalink, _ostree_metalink, G_TYPE_OBJECT)
static void
state_transition (OstreeMetalink *self,
OstreeMetalinkState new_state)
{
g_assert (self->state != new_state);
self->state = new_state;
}
static void
unknown_element (OstreeMetalink *self,
const char *element_name,
GError **error)
{
state_transition (self, OSTREE_METALINK_STATE_PASSTHROUGH);
g_assert (self->passthrough_depth == 0);
}
static void
metalink_parser_start (GMarkupParseContext *context,
const gchar *element_name,
const gchar **attribute_names,
const gchar **attribute_values,
gpointer user_data,
GError **error)
{
OstreeMetalink *self = user_data;
switch (self->state)
{
case OSTREE_METALINK_STATE_INITIAL:
if (strcmp (element_name, "metalink") == 0)
state_transition (self, OSTREE_METALINK_STATE_METALINK);
else
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_METALINK:
if (strcmp (element_name, "files") == 0)
state_transition (self, OSTREE_METALINK_STATE_FILES);
else
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_FILES:
if (strcmp (element_name, "file") == 0)
{
const char *file_name;
state_transition (self, OSTREE_METALINK_STATE_FILE);
g_clear_pointer (&self->file_name, g_free);
if (!g_markup_collect_attributes (element_name,
attribute_names,
attribute_values,
error,
G_MARKUP_COLLECT_STRING,
"name",
&file_name,
G_MARKUP_COLLECT_INVALID))
goto out;
self->file_name = g_strdup (file_name);
}
else
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_FILE:
if (strcmp (element_name, "size") == 0)
state_transition (self, OSTREE_METALINK_STATE_SIZE);
else if (strcmp (element_name, "verification") == 0)
state_transition (self, OSTREE_METALINK_STATE_VERIFICATION);
else if (strcmp (element_name, "resources") == 0)
state_transition (self, OSTREE_METALINK_STATE_RESOURCES);
else
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_SIZE:
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_VERIFICATION:
if (strcmp (element_name, "hash") == 0)
{
gs_free char *verification_type_str = NULL;
state_transition (self, OSTREE_METALINK_STATE_HASH);
if (!g_markup_collect_attributes (element_name,
attribute_names,
attribute_values,
error,
G_MARKUP_COLLECT_STRING,
"name",
&verification_type_str,
G_MARKUP_COLLECT_INVALID))
goto out;
/* Only accept sha256/sha512 */
self->verification_known = TRUE;
if (strcmp (verification_type_str, "sha256") == 0)
self->verification_type = G_CHECKSUM_SHA256;
else if (strcmp (verification_type_str, "sha512") == 0)
self->verification_type = G_CHECKSUM_SHA512;
else
self->verification_known = FALSE;
}
else
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_HASH:
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_RESOURCES:
if (strcmp (element_name, "url") == 0)
{
const char *protocol;
if (!g_markup_collect_attributes (element_name,
attribute_names,
attribute_values,
error,
G_MARKUP_COLLECT_STRING,
"protocol",
&protocol,
G_MARKUP_COLLECT_INVALID))
goto out;
/* Ignore non-HTTP resources */
if (!(strcmp (protocol, "http") == 0 || strcmp (protocol, "https") == 0))
state_transition (self, OSTREE_METALINK_STATE_PASSTHROUGH);
else
state_transition (self, OSTREE_METALINK_STATE_URL);
}
else
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_URL:
unknown_element (self, element_name, error);
break;
case OSTREE_METALINK_STATE_PASSTHROUGH:
self->passthrough_depth++;
break;
default:
g_assert_not_reached ();
}
out:
return;
}
static void
metalink_parser_end (GMarkupParseContext *context,
const gchar *element_name,
gpointer user_data,
GError **error)
{
OstreeMetalink *self = user_data;
}
static void
metalink_parser_text (GMarkupParseContext *context,
const gchar *text,
gsize text_len,
gpointer user_data,
GError **error)
{
OstreeMetalink *self = user_data;
switch (self->state)
{
case OSTREE_METALINK_STATE_INITIAL:
break;
case OSTREE_METALINK_STATE_METALINK:
break;
case OSTREE_METALINK_STATE_FILES:
break;
case OSTREE_METALINK_STATE_FILE:
break;
case OSTREE_METALINK_STATE_SIZE:
{
gs_free char *duped = g_strndup (text, text_len);
self->size = g_ascii_strtoull (duped, NULL, 10);
}
break;
case OSTREE_METALINK_STATE_VERIFICATION:
break;
case OSTREE_METALINK_STATE_HASH:
{
g_clear_pointer (&self->verification_value, g_free);
self->verification_value = g_strndup (text, text_len);
}
break;
case OSTREE_METALINK_STATE_RESOURCES:
break;
case OSTREE_METALINK_STATE_URL:
break;
case OSTREE_METALINK_STATE_PASSTHROUGH:
break;
default:
g_assert_not_reached ();
}
out:
return;
}
static void
_ostree_metalink_finalize (GObject *object)
{
OstreeMetalink *self;
self = OSTREE_METALINK (object);
G_OBJECT_CLASS (_ostree_metalink_parent_class)->finalize (object);
}
static void
_ostree_metalink_class_init (OstreeMetalinkClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = _ostree_metalink_finalize;
}
static void
_ostree_metalink_init (OstreeMetalink *self)
{
self->urls = g_ptr_array_new_with_free_func (g_free);
}
OstreeMetalink *
_ostree_metalink_new (OstreeFetcher *fetcher,
const char *requested_file,
guint64 max_size,
SoupURI *uri)
{
OstreeMetalink *self = (OstreeMetalink*)g_object_new (OSTREE_TYPE_METALINK, NULL);
return self;
}
void
_ostree_metalink_request_async (OstreeMetalink *self,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
}
GFile *
_ostree_metalink_request_finish (OstreeMetalink *self,
GAsyncResult *result,
GError **error)
{
}
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