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gda-web-provider.c
1724 lines (1530 loc) · 55.4 KB
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gda-web-provider.c
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/*
* Copyright (C) 2009 - 2015 Vivien Malerba <malerba@gnome-db.org>
* Copyright (C) 2010 David King <davidk@openismus.com>
* Copyright (C) 2011 - 2014 Murray Cumming <murrayc@murrayc.com>
* Copyright (C) 2019 Daniel Espinosa <malerba@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <glib/gi18n-lib.h>
#include <glib/gstdio.h>
#include <libgda/libgda.h>
#include <libgda/gda-data-model-private.h>
#include <libgda/gda-server-provider-extra.h>
#include <libgda/gda-server-provider-impl.h>
#include <libgda/binreloc/gda-binreloc.h>
#include <libgda/gda-statement-extra.h>
#include <sql-parser/gda-sql-parser.h>
#include "gda-web.h"
#include "gda-web-provider.h"
#include "gda-web-recordset.h"
#include "gda-web-ddl.h"
#include "gda-web-meta.h"
#include "gda-web-util.h"
#include <libgda/gda-debug-macros.h>
#define _GDA_PSTMT(x) ((GdaPStmt*)(x))
/*
* GObject methods
*/
static void gda_web_provider_class_init (GdaWebProviderClass *klass);
static void gda_web_provider_init (GdaWebProvider *provider);
G_DEFINE_TYPE(GdaWebProvider, gda_web_provider, GDA_TYPE_SERVER_PROVIDER)
/*
* GdaServerProvider's virtual methods
*/
/* connection management */
static gboolean gda_web_provider_open_connection (GdaServerProvider *provider, GdaConnection *cnc,
GdaQuarkList *params, GdaQuarkList *auth);
static gboolean gda_web_provider_close_connection (GdaServerProvider *provider, GdaConnection *cnc);
static const gchar *gda_web_provider_get_server_version (GdaServerProvider *provider, GdaConnection *cnc);
/* DDL operations */
static gboolean gda_web_provider_supports_operation (GdaServerProvider *provider, GdaConnection *cnc,
GdaServerOperationType type, GdaSet *options);
static GdaServerOperation *gda_web_provider_create_operation (GdaServerProvider *provider, GdaConnection *cnc,
GdaServerOperationType type,
GdaSet *options, GError **error);
static gchar *gda_web_provider_render_operation (GdaServerProvider *provider, GdaConnection *cnc,
GdaServerOperation *op, GError **error);
static gboolean gda_web_provider_perform_operation (GdaServerProvider *provider, GdaConnection *cnc,
GdaServerOperation *op, GError **error);
/* transactions */
static gboolean gda_web_provider_begin_transaction (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GdaTransactionIsolation level, GError **error);
static gboolean gda_web_provider_commit_transaction (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error);
static gboolean gda_web_provider_rollback_transaction (GdaServerProvider *provider, GdaConnection * cnc,
const gchar *name, GError **error);
static gboolean gda_web_provider_add_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error);
static gboolean gda_web_provider_rollback_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error);
static gboolean gda_web_provider_delete_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error);
/* information retrieval */
static const gchar *gda_web_provider_get_version (GdaServerProvider *provider);
static gboolean gda_web_provider_supports_feature (GdaServerProvider *provider, GdaConnection *cnc,
GdaConnectionFeature feature);
static GdaWorker *gda_web_provider_create_worker (GdaServerProvider *provider, gboolean for_cnc);
static const gchar *gda_web_provider_get_name (GdaServerProvider *provider);
static GdaDataHandler *gda_web_provider_get_data_handler (GdaServerProvider *provider, GdaConnection *cnc,
GType g_type, const gchar *dbms_type);
static const gchar* gda_web_provider_get_default_dbms_type (GdaServerProvider *provider, GdaConnection *cnc,
GType type);
/* statements */
static GdaSqlParser *gda_web_provider_create_parser (GdaServerProvider *provider, GdaConnection *cnc);
static gchar *gda_web_provider_statement_to_sql (GdaServerProvider *provider, GdaConnection *cnc,
GdaStatement *stmt, GdaSet *params,
GdaStatementSqlFlag flags,
GSList **params_used, GError **error);
static gboolean gda_web_provider_statement_prepare (GdaServerProvider *provider, GdaConnection *cnc,
GdaStatement *stmt, GError **error);
static GObject *gda_web_provider_statement_execute (GdaServerProvider *provider, GdaConnection *cnc,
GdaStatement *stmt, GdaSet *params,
GdaStatementModelUsage model_usage,
GType *col_types, GdaSet **last_inserted_row, GError **error);
static GdaSqlStatement *gda_web_provider_statement_rewrite (GdaServerProvider *provider, GdaConnection *cnc,
GdaStatement *stmt, GdaSet *params, GError **error);
/* Quoting */
static gchar *gda_web_provider_identifier_quote (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *id,
gboolean meta_store_convention, gboolean force_quotes);
/*
* GdaWebProvider class implementation
*/
GdaServerProviderBase web_base_functions = {
gda_web_provider_get_name,
gda_web_provider_get_version,
gda_web_provider_get_server_version,
gda_web_provider_supports_feature,
gda_web_provider_create_worker,
NULL,
gda_web_provider_create_parser,
gda_web_provider_get_data_handler,
gda_web_provider_get_default_dbms_type,
gda_web_provider_supports_operation,
gda_web_provider_create_operation,
gda_web_provider_render_operation,
gda_web_provider_statement_to_sql,
gda_web_provider_identifier_quote,
gda_web_provider_statement_rewrite,
gda_web_provider_open_connection,
NULL,
gda_web_provider_close_connection,
NULL,
NULL,
gda_web_provider_perform_operation,
gda_web_provider_begin_transaction,
gda_web_provider_commit_transaction,
gda_web_provider_rollback_transaction,
gda_web_provider_add_savepoint,
gda_web_provider_rollback_savepoint,
gda_web_provider_delete_savepoint,
gda_web_provider_statement_prepare,
gda_web_provider_statement_execute,
NULL, NULL, NULL, NULL, /* padding */
};
GdaServerProviderMeta web_meta_functions = {
_gda_web_meta__info,
_gda_web_meta__btypes,
_gda_web_meta__udt,
_gda_web_meta_udt,
_gda_web_meta__udt_cols,
_gda_web_meta_udt_cols,
_gda_web_meta__enums,
_gda_web_meta_enums,
_gda_web_meta__domains,
_gda_web_meta_domains,
_gda_web_meta__constraints_dom,
_gda_web_meta_constraints_dom,
_gda_web_meta__el_types,
_gda_web_meta_el_types,
_gda_web_meta__collations,
_gda_web_meta_collations,
_gda_web_meta__character_sets,
_gda_web_meta_character_sets,
_gda_web_meta__schemata,
_gda_web_meta_schemata,
_gda_web_meta__tables_views,
_gda_web_meta_tables_views,
_gda_web_meta__columns,
_gda_web_meta_columns,
_gda_web_meta__view_cols,
_gda_web_meta_view_cols,
_gda_web_meta__constraints_tab,
_gda_web_meta_constraints_tab,
_gda_web_meta__constraints_ref,
_gda_web_meta_constraints_ref,
_gda_web_meta__key_columns,
_gda_web_meta_key_columns,
_gda_web_meta__check_columns,
_gda_web_meta_check_columns,
_gda_web_meta__triggers,
_gda_web_meta_triggers,
_gda_web_meta__routines,
_gda_web_meta_routines,
_gda_web_meta__routine_col,
_gda_web_meta_routine_col,
_gda_web_meta__routine_par,
_gda_web_meta_routine_par,
_gda_web_meta__indexes_tab,
_gda_web_meta_indexes_tab,
_gda_web_meta__index_cols,
_gda_web_meta_index_cols,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* padding */
};
static void
gda_web_provider_class_init (GdaWebProviderClass *klass)
{
/* set virtual functions */
gda_server_provider_set_impl_functions (GDA_SERVER_PROVIDER_CLASS (klass),
GDA_SERVER_PROVIDER_FUNCTIONS_BASE,
(gpointer) &web_base_functions);
gda_server_provider_set_impl_functions (GDA_SERVER_PROVIDER_CLASS (klass),
GDA_SERVER_PROVIDER_FUNCTIONS_META,
(gpointer) &web_meta_functions);
gda_server_provider_set_impl_functions (GDA_SERVER_PROVIDER_CLASS (klass),
GDA_SERVER_PROVIDER_FUNCTIONS_XA,
(gpointer) NULL);
}
static void
gda_web_provider_init (G_GNUC_UNUSED GdaWebProvider *web_prv)
{
}
static GdaWorker *
gda_web_provider_create_worker (GdaServerProvider *provider, gboolean for_cnc)
{
/* Let's assume for now that this provider is not thread safe... */
static GdaWorker *unique_worker = NULL;
return gda_worker_new_unique (&unique_worker, TRUE);
}
/*
* Get provider name request
*/
static const gchar *
gda_web_provider_get_name (G_GNUC_UNUSED GdaServerProvider *provider)
{
return WEB_PROVIDER_NAME;
}
/*
* Get provider's version, no need to change this
*/
static const gchar *
gda_web_provider_get_version (G_GNUC_UNUSED GdaServerProvider *provider)
{
return PACKAGE_VERSION;
}
static gboolean
do_server_setup (GdaConnection *cnc, WebConnectionData *cdata)
{
SoupMessage *msg;
guint status;
gchar *real_url;
real_url = g_strdup_printf ("%s/gda-setup.php", cdata->server_base_url);
msg = soup_message_new ("GET", real_url);
if (!msg) {
gda_connection_add_event_string (cnc, _("Invalid HOST/SCRIPT '%s'"), real_url);
g_free (real_url);
return FALSE;
}
g_free (real_url);
g_object_set (G_OBJECT (cdata->front_session), SOUP_SESSION_TIMEOUT, 5, NULL);
status = soup_session_send_message (cdata->front_session, msg);
if (!SOUP_STATUS_IS_SUCCESSFUL (status)) {
gda_connection_add_event_string (cnc, msg->reason_phrase);
g_object_unref (msg);
return FALSE;
}
xmlDocPtr doc;
gchar out_status_chr;
doc = _gda_web_decode_response (cnc, cdata, msg->response_body, &out_status_chr, NULL);
g_object_unref (msg);
if (doc) {
if (out_status_chr != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, doc, NULL);
xmlFreeDoc (doc);
return FALSE;
}
xmlFreeDoc (doc);
return TRUE;
}
return FALSE;
}
/*
* Open connection request
*
* In this function, the following _must_ be done:
* - check for the presence and validify of the parameters required to actually open a connection,
* using @params
* - open the real connection to the database using the parameters previously checked
* - create a WebConnectionData structure and associate it to @cnc
*
* Returns: TRUE if no error occurred, or FALSE otherwise (and an ERROR connection event must be added to @cnc)
*/
static gboolean
gda_web_provider_open_connection (GdaServerProvider *provider, GdaConnection *cnc,
GdaQuarkList *params, GdaQuarkList *auth)
{
g_return_val_if_fail (GDA_IS_WEB_PROVIDER (provider), FALSE);
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
/* Check for connection parameters */
const gchar *db_name, *host, *path, *port, *serversecret, *pass = NULL, *use_ssl;
if (auth)
pass = gda_quark_list_find (auth, "PASSWORD");
if (!pass) {
gda_connection_add_event_string (cnc, _("The connection string must contain the %s value"), "PASSWORD");
return FALSE;
}
host = gda_quark_list_find (params, "HOST");
if (!host) {
gda_connection_add_event_string (cnc,
_("The connection string must contain the %s value"), "HOST");
return FALSE;
}
serversecret = gda_quark_list_find (params, "SECRET");
if (!serversecret) {
gda_connection_add_event_string (cnc,
_("The connection string must contain the %s value"), "SECRET");
return FALSE;
}
path = gda_quark_list_find (params, "PATH");
port = gda_quark_list_find (params, "PORT");
db_name = gda_quark_list_find (params, "DB_NAME");
if (!db_name) {
gda_connection_add_event_string (cnc,
_("The connection string must contain the %s value"), "DB_NAME");
return FALSE;
}
use_ssl = gda_quark_list_find (params, "USE_SSL");
if (use_ssl && (*use_ssl != 'T') && (*use_ssl != 't'))
use_ssl = NULL;
/* open Libsoup session */
WebConnectionData *cdata;
GString *server_url;
cdata = g_new0 (WebConnectionData, 1);
g_rec_mutex_init (& (cdata->mutex));
cdata->server_id = NULL;
cdata->forced_closing = FALSE;
cdata->worker_session = soup_session_new_with_options ("ssl-use-system-ca-file", TRUE, NULL);
cdata->front_session = soup_session_new_with_options ("max-conns-per-host", 1, "ssl-use-system-ca-file", TRUE, NULL);
if (use_ssl) {
server_url = g_string_new ("https://");
g_print ("USING SSL\n");
}
else
server_url = g_string_new ("http://");
g_string_append (server_url, host);
if (port)
g_string_append_printf (server_url, ":%s", port);
if (path)
g_string_append_printf (server_url, "/%s", path);
cdata->front_url = g_strdup_printf ("%s/gda-front.php", server_url->str);
cdata->worker_url = g_strdup_printf ("%s/gda-worker.php", server_url->str);
cdata->server_base_url = g_string_free (server_url, FALSE);
if (serversecret)
cdata->key = g_strdup (serversecret);
gda_connection_internal_set_provider_data (cnc, (GdaServerProviderConnectionData*) cdata, (GDestroyNotify) _gda_web_free_cnc_data);
/*
* perform setup
*/
if (! do_server_setup (cnc, cdata))
return FALSE;
/*
* send HELLO
*/
xmlDocPtr doc;
gchar status;
#define HELLO_MSG "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n" \
"<request>\n" \
" <cmd>HELLO</cmd>\n" \
"</request>"
doc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_HELLO, HELLO_MSG, NULL, &status);
if (!doc) {
gda_connection_internal_set_provider_data (cnc, NULL, NULL);
_gda_web_do_server_cleanup (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, doc, NULL);
xmlFreeDoc (doc);
gda_connection_internal_set_provider_data (cnc, NULL, NULL);
_gda_web_do_server_cleanup (cnc, cdata);
return FALSE;
}
xmlFreeDoc (doc);
/*
* send CONNECT
*/
gchar *tmp, *token;
#define CONNECT_MSG "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" \
"<request>\n" \
" <token>%s</token>\n" \
" <cmd>CONNECT</cmd>\n" \
"</request>"
if (cdata->key)
g_free (cdata->key);
cdata->key = g_strdup_printf ("%s/AND/%s", db_name, pass);
token = _gda_web_compute_token (cdata);
tmp = g_strdup_printf (CONNECT_MSG, token);
g_free (token);
cdata->server_secret = g_strdup (serversecret);
doc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_CONNECT, tmp, serversecret, &status);
g_free (tmp);
if (!doc) {
gda_connection_internal_set_provider_data (cnc, NULL, NULL);
_gda_web_do_server_cleanup (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, doc, NULL);
xmlFreeDoc (doc);
gda_connection_internal_set_provider_data (cnc, NULL, NULL);
_gda_web_do_server_cleanup (cnc, cdata);
return FALSE;
}
xmlFreeDoc (doc);
/*
* change key: cdata->key = MD5(cdata->key)
*/
gchar *md5str;
md5str = g_compute_checksum_for_data (G_CHECKSUM_MD5, (const guchar*) cdata->key, strlen (cdata->key));
g_free (cdata->key);
cdata->key = md5str;
return TRUE;
}
/*
* Close connection request
*
* In this function, the following _must_ be done:
* - Actually close the connection to the database using @cnc's associated WebConnectionData structure
* - Free the WebConnectionData structure and its contents
*
* Returns: TRUE if no error occurred, or FALSE otherwise (and an ERROR connection event must be added to @cnc)
*/
static gboolean
gda_web_provider_close_connection (GdaServerProvider *provider, GdaConnection *cnc)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, NULL);
if (!cdata)
return FALSE;
g_rec_mutex_lock (& (cdata->mutex));
if (!cdata->forced_closing && cdata->worker_running) {
g_rec_mutex_unlock (& (cdata->mutex));
/* send BYE message */
xmlDocPtr doc;
gchar status;
gchar *tmp, *token;
#define BYE_MSG "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>" \
"<request>\n" \
" <token>%s</token>\n" \
" <cmd>BYE</cmd>\n" \
"</request>"
token = _gda_web_compute_token (cdata);
tmp = g_strdup_printf (BYE_MSG, token);
g_free (token);
doc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_BYE, tmp, cdata->key, &status);
g_free (tmp);
if (!doc)
return FALSE;
if (status != 'C') {
_gda_web_set_connection_error_from_xmldoc (cnc, doc, NULL);
xmlFreeDoc (doc);
return FALSE;
}
xmlFreeDoc (doc);
}
else
g_rec_mutex_unlock (& (cdata->mutex));
_gda_web_do_server_cleanup (cnc, cdata);
/* Free the WebConnectionData structure and its contents*/
_gda_web_free_cnc_data (cdata);
gda_connection_internal_set_provider_data (cnc, NULL, NULL);
return TRUE;
}
/*
* Server version request
*
* Returns the server version as a string, which should be stored in @cnc's associated WebConnectionData structure
*/
static const gchar *
gda_web_provider_get_server_version (GdaServerProvider *provider, GdaConnection *cnc)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), NULL);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, NULL);
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, NULL);
if (!cdata)
return NULL;
return cdata->server_version;
}
/*
* Support operation request
*
* Tells what the implemented server operations are. To add support for an operation, the following steps are required:
* - create a web_specs_....xml.in file describing the required and optional parameters for the operation
* - add it to the Makefile.am
* - make this method return TRUE for the operation type
* - implement the gda_web_provider_render_operation() and gda_web_provider_perform_operation() methods
*
* For now no server operation is supported, it can be added if cdata->reuseable is not %NULL
*/
static gboolean
gda_web_provider_supports_operation (GdaServerProvider *provider, GdaConnection *cnc,
GdaServerOperationType type, G_GNUC_UNUSED GdaSet *options)
{
if (cnc) {
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
}
switch (type) {
case GDA_SERVER_OPERATION_CREATE_DB:
case GDA_SERVER_OPERATION_DROP_DB:
case GDA_SERVER_OPERATION_CREATE_TABLE:
case GDA_SERVER_OPERATION_DROP_TABLE:
case GDA_SERVER_OPERATION_RENAME_TABLE:
case GDA_SERVER_OPERATION_ADD_COLUMN:
case GDA_SERVER_OPERATION_CREATE_INDEX:
case GDA_SERVER_OPERATION_DROP_INDEX:
case GDA_SERVER_OPERATION_CREATE_VIEW:
case GDA_SERVER_OPERATION_DROP_VIEW:
default:
TO_IMPLEMENT;
return FALSE;
}
}
/*
* Create operation request
*
* Creates a #GdaServerOperation. The following code is generic and should only be changed
* if some further initialization is required, or if operation's contents is dependent on @cnc
*/
static GdaServerOperation *
gda_web_provider_create_operation (GdaServerProvider *provider, GdaConnection *cnc,
G_GNUC_UNUSED GdaServerOperationType type, G_GNUC_UNUSED GdaSet *options,
GError **error)
{
WebConnectionData *cdata = NULL;
if (cnc) {
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
}
if (!cdata) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR,
"%s", _("Not supported"));
return NULL;
}
TO_IMPLEMENT;
g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR,
"%s", _("Server operations not yet implemented"));
return NULL;
}
/*
* Render operation request
*/
static gchar *
gda_web_provider_render_operation (GdaServerProvider *provider, GdaConnection *cnc,
G_GNUC_UNUSED GdaServerOperation *op, GError **error)
{
WebConnectionData *cdata = NULL;
if (cnc) {
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
}
if (!cdata) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR,
"%s", _("Not supported"));
return NULL;
}
TO_IMPLEMENT;
g_set_error (error, GDA_SERVER_PROVIDER_ERROR,
GDA_SERVER_PROVIDER_METHOD_NON_IMPLEMENTED_ERROR,
"%s", _("Server operations not yet implemented"));
return NULL;
}
/*
* Perform operation request
*/
static gboolean
gda_web_provider_perform_operation (GdaServerProvider *provider, GdaConnection *cnc,
GdaServerOperation *op, GError **error)
{
GdaServerOperationType optype;
if (cnc) {
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
}
optype = gda_server_operation_get_op_type (op);
switch (optype) {
case GDA_SERVER_OPERATION_CREATE_DB:
case GDA_SERVER_OPERATION_DROP_DB:
default:
/* use the SQL from the provider to perform the action */
return gda_server_provider_perform_operation_default (provider, cnc, op, error);
}
}
/*
* Begin transaction request
*/
static gboolean
gda_web_provider_begin_transaction (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GdaTransactionIsolation level,
GError **error)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
if (name && *name) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
"%s", _("Named transaction is not supported"));
return FALSE;
}
if (level != GDA_TRANSACTION_ISOLATION_UNKNOWN) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
"%s", _("Transaction level is not supported"));
return FALSE;
}
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
if (!cdata)
return FALSE;
/* prepare XML command */
xmlDocPtr doc;
xmlNodePtr root;
gchar *token;
doc = xmlNewDoc (BAD_CAST "1.0");
root = xmlNewNode (NULL, BAD_CAST "request");
xmlDocSetRootElement (doc, root);
token = _gda_web_compute_token (cdata);
xmlNewChild (root, NULL, BAD_CAST "token", BAD_CAST token);
g_free (token);
xmlNewChild (root, NULL, BAD_CAST "cmd", BAD_CAST "BEGIN");
/* send command */
xmlChar *cmde;
xmlDocPtr replydoc;
int size;
gchar status;
xmlDocDumpMemory (doc, &cmde, &size);
xmlFreeDoc (doc);
replydoc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_PREPARE, (gchar*) cmde, cdata->key, &status);
xmlFree (cmde);
if (!replydoc) {
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, replydoc, error);
xmlFreeDoc (replydoc);
if (status == 'C')
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
return TRUE;
}
/*
* Commit transaction request
*/
static gboolean
gda_web_provider_commit_transaction (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
if (name && *name) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
"%s", _("Named transaction is not supported"));
return FALSE;
}
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
if (!cdata)
return FALSE;
/* prepare XML command */
xmlDocPtr doc;
xmlNodePtr root;
gchar *token;
doc = xmlNewDoc (BAD_CAST "1.0");
root = xmlNewNode (NULL, BAD_CAST "request");
xmlDocSetRootElement (doc, root);
token = _gda_web_compute_token (cdata);
xmlNewChild (root, NULL, BAD_CAST "token", BAD_CAST token);
g_free (token);
xmlNewChild (root, NULL, BAD_CAST "cmd", BAD_CAST "COMMIT");
/* send command */
xmlChar *cmde;
xmlDocPtr replydoc;
int size;
gchar status;
xmlDocDumpMemory (doc, &cmde, &size);
xmlFreeDoc (doc);
replydoc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_PREPARE, (gchar*) cmde, cdata->key, &status);
xmlFree (cmde);
if (!replydoc) {
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, replydoc, error);
xmlFreeDoc (replydoc);
if (status == 'C')
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
return TRUE;
}
/*
* Rollback transaction request
*/
static gboolean
gda_web_provider_rollback_transaction (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
if (name && *name) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
"%s", _("Named transaction is not supported"));
return FALSE;
}
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
if (!cdata)
return FALSE;
/* prepare XML command */
xmlDocPtr doc;
xmlNodePtr root;
gchar *token;
doc = xmlNewDoc (BAD_CAST "1.0");
root = xmlNewNode (NULL, BAD_CAST "request");
xmlDocSetRootElement (doc, root);
token = _gda_web_compute_token (cdata);
xmlNewChild (root, NULL, BAD_CAST "token", BAD_CAST token);
g_free (token);
xmlNewChild (root, NULL, BAD_CAST "cmd", BAD_CAST "ROLLBACK");
/* send command */
xmlChar *cmde;
xmlDocPtr replydoc;
int size;
gchar status;
xmlDocDumpMemory (doc, &cmde, &size);
xmlFreeDoc (doc);
replydoc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_PREPARE, (gchar*) cmde, cdata->key, &status);
xmlFree (cmde);
if (!replydoc) {
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, replydoc, error);
xmlFreeDoc (replydoc);
if (status == 'C')
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
return TRUE;
}
/*
* Add savepoint request
*/
static gboolean
gda_web_provider_add_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
if (!name || !(*name)) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
"%s", _("Unnamed savepoint is not supported"));
return FALSE;
}
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
if (!cdata)
return FALSE;
/* prepare XML command */
xmlDocPtr doc;
xmlNodePtr root, cmdnode;
gchar *token;
doc = xmlNewDoc (BAD_CAST "1.0");
root = xmlNewNode (NULL, BAD_CAST "request");
xmlDocSetRootElement (doc, root);
token = _gda_web_compute_token (cdata);
xmlNewChild (root, NULL, BAD_CAST "token", BAD_CAST token);
g_free (token);
cmdnode = xmlNewChild (root, NULL, BAD_CAST "cmd", BAD_CAST "BEGIN");
xmlSetProp (cmdnode, BAD_CAST "svpname", BAD_CAST name);
/* send command */
xmlChar *cmde;
xmlDocPtr replydoc;
int size;
gchar status;
xmlDocDumpMemory (doc, &cmde, &size);
xmlFreeDoc (doc);
replydoc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_PREPARE, (gchar*) cmde, cdata->key, &status);
xmlFree (cmde);
if (!replydoc) {
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, replydoc, error);
xmlFreeDoc (replydoc);
if (status == 'C')
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
return TRUE;
}
/*
* Rollback savepoint request
*/
static gboolean
gda_web_provider_rollback_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
const gchar *name, GError **error)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
if (!name || !(*name)) {
g_set_error (error, GDA_SERVER_PROVIDER_ERROR, GDA_SERVER_PROVIDER_NON_SUPPORTED_ERROR,
"%s", _("Unnamed savepoint is not supported"));
return FALSE;
}
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
if (!cdata)
return FALSE;
/* prepare XML command */
xmlDocPtr doc;
xmlNodePtr root, cmdnode;
gchar *token;
doc = xmlNewDoc (BAD_CAST "1.0");
root = xmlNewNode (NULL, BAD_CAST "request");
xmlDocSetRootElement (doc, root);
token = _gda_web_compute_token (cdata);
xmlNewChild (root, NULL, BAD_CAST "token", BAD_CAST token);
g_free (token);
cmdnode = xmlNewChild (root, NULL, BAD_CAST "cmd", BAD_CAST "ROLLBACK");
xmlSetProp (cmdnode, BAD_CAST "svpname", BAD_CAST name);
/* send command */
xmlChar *cmde;
xmlDocPtr replydoc;
int size;
gchar status;
xmlDocDumpMemory (doc, &cmde, &size);
xmlFreeDoc (doc);
replydoc = _gda_web_send_message_to_frontend (cnc, cdata, MESSAGE_PREPARE, (gchar*) cmde, cdata->key, &status);
xmlFree (cmde);
if (!replydoc) {
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
if (status != 'O') {
_gda_web_set_connection_error_from_xmldoc (cnc, replydoc, error);
xmlFreeDoc (replydoc);
if (status == 'C')
_gda_web_change_connection_to_closed (cnc, cdata);
return FALSE;
}
return TRUE;
}
/*
* Delete savepoint request
*/
static gboolean
gda_web_provider_delete_savepoint (GdaServerProvider *provider, GdaConnection *cnc,
G_GNUC_UNUSED const gchar *name, G_GNUC_UNUSED GError **error)
{
WebConnectionData *cdata;
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
cdata = (WebConnectionData*) gda_connection_internal_get_provider_data_error (cnc, error);
if (!cdata)
return FALSE;
TO_IMPLEMENT;
return FALSE;
}
/*
* Feature support request
*/
static gboolean
gda_web_provider_supports_feature (GdaServerProvider *provider, GdaConnection *cnc, GdaConnectionFeature feature)
{
if (cnc) {
g_return_val_if_fail (GDA_IS_CONNECTION (cnc), FALSE);
g_return_val_if_fail (gda_connection_get_provider (cnc) == provider, FALSE);
}
switch (feature) {
case GDA_CONNECTION_FEATURE_SQL :
return TRUE;
default: