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/*
*
* Copyright (C) 2005-2010 by Raymond Huang
* plushuang at users.sourceforge.net
*
* 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 2.1 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* ---
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU Lesser General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*
*/
#include <string.h>
#include <ug_plugin.h>
#include <ug_class.h>
#include <ug_data_download.h>
#include <ug_utils.h>
#include <ug_stdio.h>
#include <ug_url.h>
// ---------------------------------------------------------------------------
// UgPluginClass
//
void ug_plugin_class_register (const UgPluginClass* plugin_class)
{
const gchar** string;
plugin_class->global_init ();
ug_class_register (plugin_class->name, UG_CLASS_PLUGIN, (gpointer) plugin_class);
if (plugin_class->schemes) {
for (string = plugin_class->schemes; *string; string++)
ug_class_register (*string, UG_CLASS_PLUGIN_SCHEME, (gpointer) plugin_class);
}
if (plugin_class->file_types) {
for (string = plugin_class->file_types; *string; string++)
ug_class_register (*string, UG_CLASS_PLUGIN_FILE_TYPE, (gpointer) plugin_class);
}
}
void ug_plugin_class_unregister (const UgPluginClass* plugin_class)
{
const gchar** string;
ug_class_unregister (plugin_class->name, UG_CLASS_PLUGIN);
if (plugin_class->schemes) {
for (string = plugin_class->schemes; *string; string++)
ug_class_unregister (*string, UG_CLASS_PLUGIN_SCHEME);
}
if (plugin_class->file_types) {
for (string = plugin_class->file_types; *string; string++)
ug_class_unregister (*string, UG_CLASS_PLUGIN_FILE_TYPE);
}
plugin_class->global_finalize ();
}
const UgPluginClass* ug_plugin_class_find (const gchar* name, const gchar* type)
{
if (type == NULL)
type = UG_CLASS_PLUGIN;
return (const UgPluginClass*) ug_class_find (name, type);
}
// ---------------------------------------------------------------------------
// UgPlugin : UgPlugin is a base structure for downloading.
//
UgPlugin* ug_plugin_new (const UgPluginClass* plugin_class, UgDataset* dataset)
{
UgPlugin* plugin;
UgInitFunc init;
plugin = g_malloc0 (plugin_class->instance_size);
// initialize base data
plugin->plugin_class = plugin_class;
plugin->lock = g_mutex_new ();
plugin->dataset = ug_data_copy (dataset);
// plugin->queue = NULL;
// plugin->state = UG_STATE_STOP;
plugin->ref_count = 1;
init = plugin_class->init;
if (init)
init (plugin);
return plugin;
}
UgPlugin* ug_plugin_new_by_name (const gchar* name, UgDataset* dataset)
{
const UgPluginClass* plugin_class;
plugin_class = ug_plugin_class_find (name, NULL);
if (plugin_class == NULL)
return NULL;
return ug_plugin_new (plugin_class, dataset);
}
UgPlugin* ug_plugin_new_by_data (UgDataset* dataset)
{
const UgPluginClass* plugin_class;
UgDataCommon* common;
UgUrlPart* urlpart;
UgPathPart* pathpart;
gchar* string;
plugin_class = NULL;
common = ug_dataset_get (dataset, UgDataCommonClass, 0);
if (common == NULL)
return NULL;
if (common->url) {
urlpart = ug_url_part_new (common->url, -1);
if (urlpart->url_scheme_len) {
string = g_strndup (urlpart->url, urlpart->url_scheme_len);
plugin_class = ug_plugin_class_find (string, UG_CLASS_PLUGIN_SCHEME);
g_free (string);
}
ug_url_part_free (urlpart);
}
else if (common->file) {
pathpart = ug_path_part_new (common->file, -1);
if (pathpart->file_ext_len) {
string = g_strndup (pathpart->file_ext, pathpart->file_ext_len);
plugin_class = ug_plugin_class_find (string, UG_CLASS_PLUGIN_FILE_TYPE);
g_free (string);
}
ug_path_part_free (pathpart);
}
if (plugin_class == NULL)
return NULL;
return ug_plugin_new (plugin_class, dataset);
}
void ug_plugin_ref (UgPlugin* plugin)
{
plugin->ref_count++;
}
void ug_plugin_unref (UgPlugin* plugin)
{
UgFinalizeFunc finalize;
plugin->ref_count--;
if (plugin->ref_count == 0) {
finalize = plugin->plugin_class->finalize;
if (finalize)
finalize (plugin);
// finalize base data
g_mutex_free (plugin->lock);
ug_data_free (plugin->dataset);
ug_data_list_free (plugin->queue);
g_free (plugin);
}
}
void ug_plugin_lock (UgPlugin* plugin)
{
g_mutex_lock (plugin->lock);
}
void ug_plugin_unlock (UgPlugin* plugin)
{
g_mutex_unlock (plugin->lock);
}
void ug_plugin_delay (UgPlugin* plugin, guint millisecond)
{
gulong u_second = millisecond * 1000;
while (plugin->state == UG_STATE_RUNNING) {
if (u_second < 250000) {
g_usleep (u_second);
return;
}
g_usleep (250000);
u_second -= 250000;
}
}
gboolean ug_plugin_dispatch (UgPlugin* plugin, UgCallback callback, gpointer callback_data)
{
UgMessage* message;
UgMessage* prev;
UgMessage* tail;
g_mutex_lock (plugin->lock);
message = plugin->queue;
plugin->queue = NULL;
g_mutex_unlock (plugin->lock);
if (callback) {
for (tail = ug_data_list_last (message); tail; tail = tail->prev) {
// if progress repeat, skip current message.
if (tail->type == UG_MESSAGE_PROGRESS) {
prev = tail->prev;
if (prev && prev->type == UG_MESSAGE_PROGRESS)
continue;
}
callback (plugin, tail, callback_data);
}
}
ug_data_list_free (message);
return (plugin->state == UG_STATE_RUNNING);
}
void ug_plugin_post (UgPlugin* plugin, UgMessage* message)
{
g_mutex_lock (plugin->lock);
plugin->queue = ug_data_list_prepend (plugin->queue, message);
g_mutex_unlock (plugin->lock);
}
// concatenate folder and file to new path and try create folder and empty file.
// If folder create failed, post UG_MESSAGE_ERROR_FOLDER_CREATE_FAILED.
// If file exist, it will change filename and post UG_MESSAGE_DATA_FILE_CHANGED.
// if function succeeded, return new path and it's folder length.
gchar* ug_plugin_create_file (UgPlugin* plugin, const gchar* folder, const gchar* file, guint* folder_len)
{
GString* gstr;
const gchar* tail_str;
guint head_len;
guint location_len;
guint count;
int fd;
if (folder == NULL && file == NULL) {
ug_plugin_post (plugin, ug_message_new_error (UG_MESSAGE_ERROR_FILE_CREATE_FAILED, NULL));
return NULL;
}
// concatenate full path
gstr = g_string_sized_new (80);
if (folder) {
g_string_append (gstr, folder);
if (gstr->len && gstr->str [gstr->len -1] != G_DIR_SEPARATOR)
g_string_append_c (gstr, G_DIR_SEPARATOR);
}
if (file)
g_string_append (gstr, file);
// get location_len (length of path - filename).
tail_str = strrchr (gstr->str, G_DIR_SEPARATOR);
if (tail_str == NULL)
location_len = 0;
else
location_len = tail_str - gstr->str + 1; // + G_DIR_SEPARATOR
// create folder
if (location_len && ug_create_dir_all (gstr->str, location_len) == -1) {
ug_plugin_post (plugin, ug_message_new_error (UG_MESSAGE_ERROR_FOLDER_CREATE_FAILED, NULL));
return g_string_free (gstr, TRUE);
}
// get head_len (length of folder + primary filename)
// and tail_str ('.' + filename extension)
tail_str = strrchr (gstr->str + location_len, '.');
if (tail_str == NULL)
tail_str = gstr->str + gstr->len;
head_len = tail_str - gstr->str;
tail_str = g_strdup (tail_str);
// create file
for (count=0; count < 100; count++) {
// fd = open (gstr->str, O_CREAT | O_EXCL | O_RDWR,
// S_IREAD | S_IWRITE | S_IRGRP | S_IROTH);
fd = ug_fd_open (gstr->str, UG_FD_O_CREATE | UG_FD_O_EXCL | UG_FD_O_RDWR,
UG_FD_S_IREAD | UG_FD_S_IWRITE | UG_FD_S_IRGRP | UG_FD_S_IROTH);
if (fd != -1) {
// close (fd);
ug_fd_close (fd);
break;
}
g_string_truncate (gstr, head_len);
g_string_append_printf (gstr, "(%d)", count);
g_string_append (gstr, tail_str);
}
// free tail_str
g_free ((gpointer) tail_str);
// result
if (count == 100) {
ug_plugin_post (plugin, ug_message_new_error (UG_MESSAGE_ERROR_FILE_CREATE_FAILED, NULL));
return g_string_free (gstr, TRUE);
}
if (count > 0)
ug_plugin_post (plugin, ug_message_new_data (UG_MESSAGE_DATA_FILE_CHANGED, gstr->str + location_len));
if (folder_len)
*folder_len = location_len;
return g_string_free (gstr, FALSE);
}
// rename file from old_utf8 to new_utf8.
// If file rename fail, it will post UG_MESSAGE_WARNING_FILE_RENAME_FAILED and return FALSE.
gboolean ug_plugin_rename_file (UgPlugin* plugin, const gchar* old_utf8, const gchar* new_utf8)
{
if (ug_rename_file (old_utf8, new_utf8) == 0)
return TRUE;
// file rename failed.
ug_plugin_post (plugin, ug_message_new_warning (UG_MESSAGE_WARNING_FILE_RENAME_FAILED, NULL));
return FALSE;
}
// --- virtual functions ---
UgResult ug_plugin_set_state (UgPlugin* plugin, UgState state)
{
UgSetStateFunc set_state = plugin->plugin_class->set_state;
if (set_state)
return set_state (plugin, state);
return UG_RESULT_UNSUPPORT;
}
UgResult ug_plugin_get_state (UgPlugin* plugin, UgState* state)
{
UgGetStateFunc get_state = plugin->plugin_class->get_state;
if (get_state)
return get_state (plugin, state);
return UG_RESULT_UNSUPPORT;
}
UgResult ug_plugin_get (UgPlugin* plugin, guint parameter, gpointer data)
{
UgGetFunc get = plugin->plugin_class->get;
if (get)
return get (plugin, parameter, data);
return UG_RESULT_UNSUPPORT;
}
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