diff options
Diffstat (limited to 'src/lib/merchant_api_wallet_get_template.c')
| -rw-r--r-- | src/lib/merchant_api_wallet_get_template.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/lib/merchant_api_wallet_get_template.c b/src/lib/merchant_api_wallet_get_template.c new file mode 100644 index 00000000..d9ca95bc --- /dev/null +++ b/src/lib/merchant_api_wallet_get_template.c @@ -0,0 +1,195 @@ +/* + 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 Lesser General Public License as published by the Free Software + Foundation; either version 2.1, 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License along with + TALER; see the file COPYING.LGPL. If not, see + <http://www.gnu.org/licenses/> +*/ +/** + * @file merchant_api_wallet_get_template.c + * @brief Implementation of the GET /templates/$ID request of the merchant's HTTP API + * @author Priscilla HUANG + */ +#include "platform.h" +#include <curl/curl.h> +#include <jansson.h> +#include <microhttpd.h> /* just for HTTP status codes */ +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_curl_lib.h> +#include "taler_merchant_service.h" +#include "merchant_api_curl_defaults.h" +#include <taler/taler_json_lib.h> +#include <taler/taler_signatures.h> + + +/** + * Handle for a GET /templates/$ID operation. + */ +struct TALER_MERCHANT_WalletTemplateGetHandle +{ + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_MERCHANT_WalletTemplateGetCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Reference to the execution context. + */ + struct GNUNET_CURL_Context *ctx; + +}; + + +/** + * Function called when we're done processing the + * HTTP GET /templates/$ID request. + * + * @param cls the `struct TALER_MERCHANT_TemplateGetHandle` + * @param response_code HTTP response code, 0 on error + * @param response response body, NULL if not in JSON + */ +static void +handle_get_template_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_MERCHANT_WalletTemplateGetHandle *tgh = cls; + const json_t *json = response; + struct TALER_MERCHANT_WalletTemplateGetResponse tgr = { + .hr.http_status = (unsigned int) response_code, + .hr.reply = json + }; + + tgh->job = NULL; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Got /templates/$ID response with status code %u\n", + (unsigned int) response_code); + switch (response_code) + { + case MHD_HTTP_OK: + { + const json_t *contract; + struct GNUNET_JSON_Specification spec[] = { + GNUNET_JSON_spec_object_const ("template_contract", + &contract), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK == + GNUNET_JSON_parse (json, + spec, + NULL, NULL)) + { + tgr.details.ok.template_contract = contract; + tgh->cb (tgh->cb_cls, + &tgr); + TALER_MERCHANT_wallet_template_get_cancel (tgh); + return; + } + tgr.hr.http_status = 0; + tgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; + break; + } + case MHD_HTTP_UNAUTHORIZED: + tgr.hr.ec = TALER_JSON_get_error_code (json); + tgr.hr.hint = TALER_JSON_get_error_hint (json); + /* Nothing really to verify, merchant says we need to authenticate. */ + break; + case MHD_HTTP_NOT_FOUND: + tgr.hr.ec = TALER_JSON_get_error_code (json); + tgr.hr.hint = TALER_JSON_get_error_hint (json); + break; + default: + /* unexpected response code */ + tgr.hr.ec = TALER_JSON_get_error_code (json); + tgr.hr.hint = TALER_JSON_get_error_hint (json); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d\n", + (unsigned int) response_code, + (int) tgr.hr.ec); + break; + } + tgh->cb (tgh->cb_cls, + &tgr); + TALER_MERCHANT_wallet_template_get_cancel (tgh); +} + + +struct TALER_MERCHANT_WalletTemplateGetHandle * +TALER_MERCHANT_wallet_template_get ( + struct GNUNET_CURL_Context *ctx, + const char *backend_url, + const char *template_id, + TALER_MERCHANT_WalletTemplateGetCallback cb, + void *cb_cls) +{ + struct TALER_MERCHANT_WalletTemplateGetHandle *tgh; + CURL *eh; + + tgh = GNUNET_new (struct TALER_MERCHANT_WalletTemplateGetHandle); + tgh->ctx = ctx; + tgh->cb = cb; + tgh->cb_cls = cb_cls; + { + char *path; + + GNUNET_asprintf (&path, + "templates/%s", + template_id); + tgh->url = TALER_url_join (backend_url, + path, + NULL); + GNUNET_free (path); + } + if (NULL == tgh->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (tgh); + return NULL; + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Requesting URL '%s'\n", + tgh->url); + eh = TALER_MERCHANT_curl_easy_get_ (tgh->url); + tgh->job = GNUNET_CURL_job_add (ctx, + eh, + &handle_get_template_finished, + tgh); + return tgh; +} + + +void +TALER_MERCHANT_wallet_template_get_cancel ( + struct TALER_MERCHANT_WalletTemplateGetHandle *tgh) +{ + if (NULL != tgh->job) + GNUNET_CURL_job_cancel (tgh->job); + GNUNET_free (tgh->url); + GNUNET_free (tgh); +} |