diff options
Diffstat (limited to 'src/lib/exchange_api_purse_delete.c')
| -rw-r--r-- | src/lib/exchange_api_purse_delete.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/src/lib/exchange_api_purse_delete.c b/src/lib/exchange_api_purse_delete.c new file mode 100644 index 000000000..6f8ecc381 --- /dev/null +++ b/src/lib/exchange_api_purse_delete.c @@ -0,0 +1,243 @@ +/* + This file is part of TALER + Copyright (C) 2022 Taler Systems SA + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU 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 General Public License for more details. + + You should have received a copy of the GNU General Public License along with + TALER; see the file COPYING. If not, see + <http://www.gnu.org/licenses/> + */ +/** + * @file lib/exchange_api_purse_delete.c + * @brief Implementation of the client to delete a purse + * into an account + * @author Christian Grothoff + */ +#include "platform.h" +#include <jansson.h> +#include <microhttpd.h> /* just for HTTP status codes */ +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_json_lib.h> +#include <gnunet/gnunet_curl_lib.h> +#include "taler_json_lib.h" +#include "taler_exchange_service.h" +#include "exchange_api_handle.h" +#include "exchange_api_common.h" +#include "taler_signatures.h" +#include "exchange_api_curl_defaults.h" + + +/** + * @brief A purse delete with deposit handle + */ +struct TALER_EXCHANGE_PurseDeleteHandle +{ + + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_EXCHANGE_PurseDeleteCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Header with the purse_sig. + */ + struct curl_slist *xhdr; +}; + + +/** + * Function called when we're done processing the + * HTTP DELETE /purse/$PID request. + * + * @param cls the `struct TALER_EXCHANGE_PurseDeleteHandle` + * @param response_code HTTP response code, 0 on error + * @param response parsed JSON result, NULL on error + */ +static void +handle_purse_delete_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_EXCHANGE_PurseDeleteHandle *pdh = cls; + const json_t *j = response; + struct TALER_EXCHANGE_PurseDeleteResponse dr = { + .hr.reply = j, + .hr.http_status = (unsigned int) response_code + }; + + pdh->job = NULL; + switch (response_code) + { + case 0: + dr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; + break; + case MHD_HTTP_NO_CONTENT: + break; + case MHD_HTTP_BAD_REQUEST: + /* This should never happen, either us or the exchange is buggy + (or API version conflict); just pass JSON reply to the application */ + dr.hr.ec = TALER_JSON_get_error_code (j); + dr.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_FORBIDDEN: + dr.hr.ec = TALER_JSON_get_error_code (j); + dr.hr.hint = TALER_JSON_get_error_hint (j); + /* Nothing really to verify, exchange says one of the signatures is + invalid; as we checked them, this should never happen, we + should pass the JSON reply to the application */ + break; + case MHD_HTTP_NOT_FOUND: + dr.hr.ec = TALER_JSON_get_error_code (j); + dr.hr.hint = TALER_JSON_get_error_hint (j); + /* Nothing really to verify, this should never + happen, we should pass the JSON reply to the application */ + break; + case MHD_HTTP_CONFLICT: + dr.hr.ec = TALER_JSON_get_error_code (j); + dr.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + dr.hr.ec = TALER_JSON_get_error_code (j); + dr.hr.hint = TALER_JSON_get_error_hint (j); + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + break; + default: + /* unexpected response code */ + dr.hr.ec = TALER_JSON_get_error_code (j); + dr.hr.hint = TALER_JSON_get_error_hint (j); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d for exchange deposit\n", + (unsigned int) response_code, + dr.hr.ec); + GNUNET_break_op (0); + break; + } + pdh->cb (pdh->cb_cls, + &dr); + TALER_EXCHANGE_purse_delete_cancel (pdh); +} + + +struct TALER_EXCHANGE_PurseDeleteHandle * +TALER_EXCHANGE_purse_delete ( + struct GNUNET_CURL_Context *ctx, + const char *url, + const struct TALER_PurseContractPrivateKeyP *purse_priv, + TALER_EXCHANGE_PurseDeleteCallback cb, + void *cb_cls) +{ + struct TALER_EXCHANGE_PurseDeleteHandle *pdh; + CURL *eh; + struct TALER_PurseContractPublicKeyP purse_pub; + struct TALER_PurseContractSignatureP purse_sig; + char arg_str[sizeof (purse_pub) * 2 + 32]; + + pdh = GNUNET_new (struct TALER_EXCHANGE_PurseDeleteHandle); + pdh->cb = cb; + pdh->cb_cls = cb_cls; + GNUNET_CRYPTO_eddsa_key_get_public (&purse_priv->eddsa_priv, + &purse_pub.eddsa_pub); + { + char pub_str[sizeof (purse_pub) * 2]; + char *end; + + end = GNUNET_STRINGS_data_to_string (&purse_pub, + sizeof (purse_pub), + pub_str, + sizeof (pub_str)); + *end = '\0'; + GNUNET_snprintf (arg_str, + sizeof (arg_str), + "purses/%s", + pub_str); + } + pdh->url = TALER_url_join (url, + arg_str, + NULL); + if (NULL == pdh->url) + { + GNUNET_break (0); + GNUNET_free (pdh); + return NULL; + } + TALER_wallet_purse_delete_sign (purse_priv, + &purse_sig); + { + char *delete_str; + char *xhdr; + + delete_str = + GNUNET_STRINGS_data_to_string_alloc (&purse_sig, + sizeof (purse_sig)); + GNUNET_asprintf (&xhdr, + "Taler-Purse-Signature: %s", + delete_str); + GNUNET_free (delete_str); + pdh->xhdr = curl_slist_append (NULL, + xhdr); + GNUNET_free (xhdr); + } + eh = TALER_EXCHANGE_curl_easy_get_ (pdh->url); + if (NULL == eh) + { + GNUNET_break (0); + curl_slist_free_all (pdh->xhdr); + GNUNET_free (pdh->url); + GNUNET_free (pdh); + return NULL; + } + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_CUSTOMREQUEST, + MHD_HTTP_METHOD_DELETE)); + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "URL for purse delete: `%s'\n", + pdh->url); + pdh->job = GNUNET_CURL_job_add2 (ctx, + eh, + pdh->xhdr, + &handle_purse_delete_finished, + pdh); + return pdh; +} + + +void +TALER_EXCHANGE_purse_delete_cancel ( + struct TALER_EXCHANGE_PurseDeleteHandle *pdh) +{ + if (NULL != pdh->job) + { + GNUNET_CURL_job_cancel (pdh->job); + pdh->job = NULL; + } + curl_slist_free_all (pdh->xhdr); + GNUNET_free (pdh->url); + GNUNET_free (pdh); +} + + +/* end of exchange_api_purse_delete.c */ |