diff options
Diffstat (limited to 'src/exchange/taler-exchange-httpd_reserves_get.c')
| -rw-r--r-- | src/exchange/taler-exchange-httpd_reserves_get.c | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/exchange/taler-exchange-httpd_reserves_get.c b/src/exchange/taler-exchange-httpd_reserves_get.c new file mode 100644 index 000000000..d06a871e7 --- /dev/null +++ b/src/exchange/taler-exchange-httpd_reserves_get.c @@ -0,0 +1,175 @@ +/* + This file is part of TALER + Copyright (C) 2014-2020 Taler Systems SA + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU Affero General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + TALER 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 Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License along with + TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> +*/ +/** + * @file taler-exchange-httpd_reserves_get.c + * @brief Handle /reserves/$RESERVE_PUB GET requests + * @author Florian Dold + * @author Benedikt Mueller + * @author Christian Grothoff + */ +#include "platform.h" +#include <gnunet/gnunet_util_lib.h> +#include <jansson.h> +#include "taler_mhd_lib.h" +#include "taler_json_lib.h" +#include "taler-exchange-httpd_reserves_get.h" +#include "taler-exchange-httpd_responses.h" +#include "taler-exchange-httpd_keystate.h" + + +/** + * Send reserve status information to client. + * + * @param connection connection to the client + * @param rh reserve history to return + * @return MHD result code + */ +static int +reply_reserve_status_success (struct MHD_Connection *connection, + const struct TALER_EXCHANGEDB_ReserveHistory *rh) +{ + json_t *json_balance; + json_t *json_history; + struct TALER_Amount balance; + + json_history = TEH_RESPONSE_compile_reserve_history (rh, + &balance); + if (NULL == json_history) + return TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_RESERVE_STATUS_DB_ERROR, + "balance calculation failure"); + json_balance = TALER_JSON_from_amount (&balance); + return TALER_MHD_reply_json_pack (connection, + MHD_HTTP_OK, + "{s:o, s:o}", + "balance", json_balance, + "history", json_history); +} + + +/** + * Closure for #reserve_status_transaction. + */ +struct ReserveStatusContext +{ + /** + * Public key of the reserve the inquiry is about. + */ + struct TALER_ReservePublicKeyP reserve_pub; + + /** + * History of the reserve, set in the callback. + */ + struct TALER_EXCHANGEDB_ReserveHistory *rh; + +}; + + +/** + * Function implementing /reserve/status transaction. + * Execute a /reserve/status. Given the public key of a reserve, + * return the associated transaction history. Runs the + * transaction logic; 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 a `struct ReserveStatusContext *` + * @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 (!); unused + * @return transaction status + */ +static enum GNUNET_DB_QueryStatus +reserve_status_transaction (void *cls, + struct MHD_Connection *connection, + struct TALER_EXCHANGEDB_Session *session, + int *mhd_ret) +{ + struct ReserveStatusContext *rsc = cls; + + (void) connection; + (void) mhd_ret; + return TEH_plugin->get_reserve_history (TEH_plugin->cls, + session, + &rsc->reserve_pub, + &rsc->rh); +} + + +/** + * Handle a GET "/reserves/" request. Parses the + * given "reserve_pub" in @a args (which should contain the + * EdDSA public key of a reserve) and then respond with the + * status of the reserve. + * + * @param rh context of the handler + * @param connection the MHD connection to handle + * @param args array of additional options (length: 1, just the reserve_pub) + * @return MHD result code + */ +int +TEH_RESERVE_handler_reserve_status (const struct TEH_RequestHandler *rh, + struct MHD_Connection *connection, + const char *const args[1]) +{ + struct ReserveStatusContext rsc; + int mhd_ret; + + (void) rh; + if (GNUNET_OK != + GNUNET_STRINGS_string_to_data (args[0], + strlen (args[0]), + &rsc.reserve_pub, + sizeof (rsc.reserve_pub))) + { + GNUNET_break_op (0); + return TALER_MHD_reply_with_error (connection, + MHD_HTTP_BAD_REQUEST, + TALER_EC_RESERVES_INVALID_RESERVE_PUB, + "reserve public key malformed"); + } + rsc.rh = NULL; + if (GNUNET_OK != + TEH_DB_run_transaction (connection, + "get reserve status", + &mhd_ret, + &reserve_status_transaction, + &rsc)) + return mhd_ret; + + /* generate proper response */ + if (NULL == rsc.rh) + return TALER_MHD_reply_json_pack (connection, + MHD_HTTP_NOT_FOUND, + "{s:s, s:s, s:I}", + "hint", "Reserve not found", + "parameter", "reserve_pub", + "code", + (json_int_t) + TALER_EC_RESERVE_STATUS_UNKNOWN); + mhd_ret = reply_reserve_status_success (connection, + rsc.rh); + TEH_plugin->free_reserve_history (TEH_plugin->cls, + rsc.rh); + return mhd_ret; +} + + +/* end of taler-exchange-httpd_reserves_get.c */ |