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-rw-r--r--src/exchange/taler-exchange-httpd_refresh_link.c172
1 files changed, 106 insertions, 66 deletions
diff --git a/src/exchange/taler-exchange-httpd_refresh_link.c b/src/exchange/taler-exchange-httpd_refresh_link.c
index c85431f04..0be699840 100644
--- a/src/exchange/taler-exchange-httpd_refresh_link.c
+++ b/src/exchange/taler-exchange-httpd_refresh_link.c
@@ -56,6 +56,11 @@ struct HTD_Context
{
/**
+ * Public key of the coin that we are tracing.
+ */
+ struct TALER_CoinSpendPublicKeyP coin_pub;
+
+ /**
* Session link data we collect.
*/
struct TEH_RESPONSE_LinkSessionInfo *sessions;
@@ -100,18 +105,18 @@ reply_refresh_link_success (struct MHD_Connection *connection,
unsigned int num_sessions,
const struct TEH_RESPONSE_LinkSessionInfo *sessions)
{
- json_t *root;
json_t *mlist;
int res;
- unsigned int i;
mlist = json_array ();
- for (i=0;i<num_sessions;i++)
+ for (unsigned int i=0;i<num_sessions;i++)
{
- const struct TALER_EXCHANGEDB_LinkDataList *pos;
json_t *list = json_array ();
+ json_t *root;
- for (pos = sessions[i].ldl; NULL != pos; pos = pos->next)
+ for (const struct TALER_EXCHANGEDB_LinkDataList *pos = sessions[i].ldl;
+ NULL != pos;
+ pos = pos->next)
{
json_t *obj;
@@ -163,24 +168,24 @@ handle_transfer_data (void *cls,
struct HTD_Context *ctx = cls;
struct TALER_EXCHANGEDB_LinkDataList *ldl;
struct TEH_RESPONSE_LinkSessionInfo *lsi;
+ enum GNUNET_DB_QueryStatus qs;
- if (GNUNET_OK != ctx->status)
+ if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != ctx->status)
return;
- ldl = TEH_plugin->get_link_data_list (TEH_plugin->cls,
- ctx->session,
- session_hash);
- if (NULL == ldl)
+ ldl = NULL;
+ qs = TEH_plugin->get_link_data_list (TEH_plugin->cls,
+ ctx->session,
+ session_hash,
+ &ldl);
+ if (qs <= 0)
{
- ctx->status = GNUNET_NO;
- if (MHD_NO ==
- TEH_RESPONSE_reply_json_pack (ctx->connection,
- MHD_HTTP_NOT_FOUND,
- "{s:s}",
- "error",
- "link data not found (link)"))
- ctx->status = GNUNET_SYSERR;
+ if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
+ ctx->status = GNUNET_DB_STATUS_HARD_ERROR;
+ else
+ ctx->status = qs;
return;
}
+ GNUNET_assert (NULL != ldl);
GNUNET_array_grow (ctx->sessions,
ctx->num_sessions,
ctx->num_sessions + 1);
@@ -191,61 +196,80 @@ handle_transfer_data (void *cls,
/**
+ * Free session data kept in @a ctx
+ *
+ * @param ctx context to clean up
+ */
+static void
+purge_context (struct HTD_Context *ctx)
+{
+ for (unsigned int i=0;i<ctx->num_sessions;i++)
+ TEH_plugin->free_link_data_list (TEH_plugin->cls,
+ ctx->sessions[i].ldl);
+ GNUNET_free_non_null (ctx->sessions);
+ ctx->sessions = NULL;
+ ctx->num_sessions = 0;
+}
+
+
+/**
* Execute a "/refresh/link". Returns the linkage information that
* will allow the owner of a coin to follow the refresh trail to
* the refreshed coin.
*
- * @param connection the MHD connection to handle
- * @param coin_pub public key of the coin to link
- * @return MHD result code
+ * If it returns a non-error code, the transaction logic MUST
+ * NOT queue a MHD response. IF it returns an hard error, the
+ * transaction logic MUST queue a MHD response and set @a mhd_ret. IF
+ * it returns the soft error code, the function MAY be called again to
+ * retry and MUST not queue a MHD response.
+ *
+ * @param cls closure
+ * @param connection MHD request which triggered the transaction
+ * @param session database session to use
+ * @param[out] mhd_ret set to MHD response status for @a connection,
+ * if transaction failed (!)
+ * @return transaction status
*/
-static int
-execute_refresh_link (struct MHD_Connection *connection,
- const struct TALER_CoinSpendPublicKeyP *coin_pub)
+static enum GNUNET_DB_QueryStatus
+refresh_link_transaction (void *cls,
+ struct MHD_Connection *connection,
+ struct TALER_EXCHANGEDB_Session *session,
+ int *mhd_ret)
{
- struct HTD_Context ctx;
- int res;
- unsigned int i;
+ struct HTD_Context *ctx = cls;
+ enum GNUNET_DB_QueryStatus qs;
- if (NULL == (ctx.session = TEH_plugin->get_session (TEH_plugin->cls)))
- {
- GNUNET_break (0);
- return TEH_RESPONSE_reply_internal_db_error (connection,
- TALER_EC_DB_SETUP_FAILED);
- }
- ctx.connection = connection;
- ctx.num_sessions = 0;
- ctx.sessions = NULL;
- ctx.status = GNUNET_OK;
- res = TEH_plugin->get_transfer (TEH_plugin->cls,
- ctx.session,
- coin_pub,
- &handle_transfer_data,
- &ctx);
- if (GNUNET_SYSERR == ctx.status)
+ ctx->session = session;
+ ctx->status = GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
+ qs = TEH_plugin->get_transfer (TEH_plugin->cls,
+ session,
+ &ctx->coin_pub,
+ &handle_transfer_data,
+ ctx);
+ ctx->session = NULL;
+ if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
- res = MHD_NO;
- goto cleanup;
+ *mhd_ret = TEH_RESPONSE_reply_arg_unknown (connection,
+ TALER_EC_REFRESH_LINK_COIN_UNKNOWN,
+ "coin_pub");
+ return GNUNET_DB_STATUS_HARD_ERROR;
}
- if (GNUNET_NO == ctx.status)
+ if (0 < qs)
{
- res = MHD_YES;
- goto cleanup;
+ qs = ctx->status;
+ if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
+ {
+ *mhd_ret = TEH_RESPONSE_reply_json_pack (ctx->connection,
+ MHD_HTTP_NOT_FOUND,
+ "{s:s}",
+ "error",
+ "link data not found (link)");
+ return GNUNET_DB_STATUS_HARD_ERROR;
+ }
+ return qs;
}
- GNUNET_assert (GNUNET_OK == ctx.status);
- if (0 == ctx.num_sessions)
- return TEH_RESPONSE_reply_arg_unknown (connection,
- TALER_EC_REFRESH_LINK_COIN_UNKNOWN,
- "coin_pub");
- res = reply_refresh_link_success (connection,
- ctx.num_sessions,
- ctx.sessions);
- cleanup:
- for (i=0;i<ctx.num_sessions;i++)
- TEH_plugin->free_link_data_list (TEH_plugin->cls,
- ctx.sessions[i].ldl);
- GNUNET_free_non_null (ctx.sessions);
- return res;
+ purge_context (ctx);
+ return qs;
}
@@ -267,19 +291,35 @@ TEH_REFRESH_handler_refresh_link (struct TEH_RequestHandler *rh,
const char *upload_data,
size_t *upload_data_size)
{
- struct TALER_CoinSpendPublicKeyP coin_pub;
+ int mhd_ret;
int res;
+ struct HTD_Context ctx;
+ memset (&ctx,
+ 0,
+ sizeof (ctx));
res = TEH_PARSE_mhd_request_arg_data (connection,
"coin_pub",
- &coin_pub,
+ &ctx.coin_pub,
sizeof (struct TALER_CoinSpendPublicKeyP));
if (GNUNET_SYSERR == res)
return MHD_NO;
if (GNUNET_OK != res)
return MHD_YES;
- return execute_refresh_link (connection,
- &coin_pub);
+ if (GNUNET_OK !=
+ TEH_DB_run_transaction (connection,
+ &mhd_ret,
+ &refresh_link_transaction,
+ &ctx))
+ {
+ purge_context (&ctx);
+ return mhd_ret;
+ }
+ mhd_ret = reply_refresh_link_success (connection,
+ ctx.num_sessions,
+ ctx.sessions);
+ purge_context (&ctx);
+ return mhd_ret;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 08:57:39 +0000