diff options
Diffstat (limited to 'src/lib/donau_api_csr_post.c')
| -rw-r--r-- | src/lib/donau_api_csr_post.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/src/lib/donau_api_csr_post.c b/src/lib/donau_api_csr_post.c new file mode 100644 index 0000000..9a31bf4 --- /dev/null +++ b/src/lib/donau_api_csr_post.c @@ -0,0 +1,230 @@ +/* + This file is part of TALER + Copyright (C) 2024 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/donau_api_csr_post.c + * @brief Implementation of the "handle" component of the donau's HTTP API + * @author Lukas Matyja + */ +#include <gnunet/gnunet_curl_lib.h> +#include <taler/taler_json_lib.h> +#include <taler/taler_curl_lib.h> +#include "donau_service.h" +#include "donau_api_curl_defaults.h" +#include "donau_json_lib.h" + + +/** + * Handle for a POST /csr-issue request. + */ +struct DONAU_CsRBatchIssueHandle +{ + /** + * The url for the /csr-issue request. + */ + char *url; + + /** + * Minor context that holds body and headers. + */ + struct TALER_CURL_PostContext post_ctx; + + /** + * Entry for this request with the `struct GNUNET_CURL_Context`. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + DONAU_CsRBatchIssueCallback cb; + + /** + * Closure to pass to @e cb. + */ + void *cb_cls; + + /** + * Reference to the execution context. + */ + struct GNUNET_CURL_Context *ctx; + +}; + +/** + * Function called when we're done processing the + * HTTP POST /csr-issue request. + * + * @param cls the `struct KeysRequest` + * @param response_code HTTP response code, 0 on error + * @param resp_obj parsed JSON result, NULL on error + */ +static void +handle_csr_issue_post_finished (void *cls, + long response_code, + const void *resp_obj) +{ + struct DONAU_CsRBatchIssueHandle *csrh = cls; + const json_t *j = resp_obj; + + struct DONAU_CsRBatchIssueResponse csrresp = { + .hr.reply = j, + .hr.http_status = (unsigned int) response_code + }; + + csrh->job = NULL; + switch (response_code) + { + case MHD_HTTP_CREATED: + struct GNUNET_JSON_Specification spec[] = { + TALER_JSON_spec_exchange_withdraw_values ( // TODO: method for GNUNET + "ewv", + (struct TALER_ExchangeWithdrawValues *) &csrresp.details.ok.alg_values), + GNUNET_JSON_spec_end () + }; + if (GNUNET_OK != + GNUNET_JSON_parse (j, + spec, + NULL, + NULL)) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not parse response from csr POST\n"); + GNUNET_break_op (0); + } + csrh->cb (csrh->cb_cls, + &csrresp); + csrh->cb = NULL; + // Donation unit was revoked. + case MHD_HTTP_GONE: + csrresp.hr.ec = TALER_JSON_get_error_code (j); + csrresp.hr.hint = TALER_JSON_get_error_hint (j); + break; + // Donation unit or endpoint not found. + case MHD_HTTP_NOT_FOUND: + csrresp.hr.ec = TALER_JSON_get_error_code (j); + csrresp.hr.hint = TALER_JSON_get_error_hint (j); + break; + case MHD_HTTP_BAD_REQUEST: + csrresp.hr.ec = TALER_JSON_get_error_code (j); + csrresp.hr.hint = TALER_JSON_get_error_hint (j); + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + csrresp.hr.ec = TALER_JSON_get_error_code (j); + csrresp.hr.hint = TALER_JSON_get_error_hint (j); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d for POST %s\n", + (unsigned int) response_code, + (int) csrresp.hr.ec, + csrh->url); + break; + } + if (NULL != csrh->cb) + { + csrh->cb (csrh->cb_cls, + &csrresp); + csrh->cb = NULL; + } + DONAU_csr_cancel (csrh); +} + + +struct DONAU_CsRBatchIssueHandle * +DONAU_csr_issue ( + struct GNUNET_CURL_Context *ctx, + const char *url, + const struct DONAU_DonationUnitPublicKey *pk, + const struct GNUNET_CRYPTO_CsSessionNonce *nonce, + DONAU_CsRBatchIssueCallback cb, + void *cb_cls) +{ + struct DONAU_CsRBatchIssueHandle *csrh; + CURL *eh; + json_t *body; + + struct DONAU_DonationUnitHashP h_donation_unit_pub; + DONAU_donation_unit_pub_hash (pk, + &h_donation_unit_pub); + + TALER_LOG_DEBUG ("Connecting to the donau (%s)\n", + url); + csrh = GNUNET_new (struct DONAU_CsRBatchIssueHandle); + csrh->url = GNUNET_strdup (url); + csrh->cb = cb; + csrh->cb_cls = cb_cls; + csrh->ctx = ctx; + csrh->url = TALER_url_join (url, + "csr-issue", + NULL); + if (NULL == csrh->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct requested URL.\n"); + GNUNET_free (csrh); + return NULL; + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Request CS R with URL `%s'.\n", + csrh->url); + body = GNUNET_JSON_PACK ( + GNUNET_JSON_pack_data_varsize ("nonce", + nonce, + sizeof(*nonce)), + GNUNET_JSON_pack_data_varsize ("du_pub_hash", + &h_donation_unit_pub, + sizeof(h_donation_unit_pub))); + eh = DONAU_curl_easy_get_ (csrh->url); + if ( (NULL == eh) || + (GNUNET_OK != + TALER_curl_easy_post (&csrh->post_ctx, + eh, + body)) ) + { + GNUNET_break (0); + if (NULL != eh) + curl_easy_cleanup (eh); + json_decref (body); + GNUNET_free (csrh->url); + return NULL; + } + json_decref (body); + csrh->job = GNUNET_CURL_job_add2 (ctx, + eh, + csrh->post_ctx.headers, + &handle_csr_issue_post_finished, + csrh); + return csrh; +} + + +void +DONAU_csr_cancel ( + struct DONAU_CsRBatchIssueHandle *csrh) +{ + if (NULL != csrh->job) + { + GNUNET_CURL_job_cancel (csrh->job); + csrh->job = NULL; + } + TALER_curl_easy_post_finished (&csrh->post_ctx); + GNUNET_free (csrh->url); + GNUNET_free (csrh); +} |