diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib/Makefile.am | 1 | ||||
| -rw-r--r-- | src/lib/merchant_api_get_product.c | 269 |
2 files changed, 270 insertions, 0 deletions
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am index b92733ff..bd988a48 100644 --- a/src/lib/Makefile.am +++ b/src/lib/Makefile.am @@ -24,6 +24,7 @@ libtalermerchant_la_SOURCES = \ merchant_api_get_config.c \ merchant_api_get_instance.c \ merchant_api_get_instances.c \ + merchant_api_get_product.c \ merchant_api_get_products.c \ merchant_api_patch_instance.c \ merchant_api_post_instances.c \ diff --git a/src/lib/merchant_api_get_product.c b/src/lib/merchant_api_get_product.c new file mode 100644 index 00000000..f0f7cca1 --- /dev/null +++ b/src/lib/merchant_api_get_product.c @@ -0,0 +1,269 @@ +/* + This file is part of TALER + Copyright (C) 2014-2018, 2020 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 lib/merchant_api_get_product.c + * @brief Implementation of the GET /product/$ID request of the merchant's HTTP API + * @author Christian Grothoff + */ +#include "platform.h" +#include <curl/curl.h> +#include <jansson.h> +#include <microhttpd.h> /* just for HTTP status codes */ +#include <gnunet/gnunet_util_lib.h> +#include <gnunet/gnunet_curl_lib.h> +#include "taler_merchant_service.h" +#include <taler/taler_json_lib.h> +#include <taler/taler_signatures.h> + + +/** + * Handle for a GET /products/$ID operation. + */ +struct TALER_MERCHANT_ProductGetHandle +{ + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_MERCHANT_ProductGetCallback 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 /products/$ID request. + * + * @param cls the `struct TALER_MERCHANT_ProductGetHandle` + * @param response_code HTTP response code, 0 on error + * @param json response body, NULL if not in JSON + */ +static void +handle_get_product_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_MERCHANT_ProductGetHandle *pgh = cls; + const json_t *json = response; + struct TALER_MERCHANT_HttpResponse hr = { + .http_status = (unsigned int) response_code, + .reply = json + }; + + pgh->job = NULL; + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Got /products/$ID response with status code %u\n", + (unsigned int) response_code); + switch (response_code) + { + case MHD_HTTP_OK: + { + const char *description; + json_t *description_i18n; + const char *unit; + struct TALER_Amount price; + json_t *image; + json_t *taxes; + int64_t total_stocked; + uint64_t total_sold; + uint64_t total_lost; + json_t *location; + struct GNUNET_TIME_Absolute next_restock; + struct GNUNET_JSON_Specification spec[] = { + GNUNET_JSON_spec_string ("description", + &description), + GNUNET_JSON_spec_json ("description_i18n", + &description_i18n), + GNUNET_JSON_spec_string ("unit", + &unit), + TALER_JSON_spec_amount ("price_fee", + &price), + GNUNET_JSON_spec_json ("image", + &image), + GNUNET_JSON_spec_json ("taxes", + &taxes), + GNUNET_JSON_spec_int64 ("total_stocked", + &total_stocked), + GNUNET_JSON_spec_uint64 ("total_sold", + &total_sold), + GNUNET_JSON_spec_uint64 ("total_lost", + &total_lost), + GNUNET_JSON_spec_json ("location", + &location), + GNUNET_JSON_spec_absolute_time ("next_restock", + &next_restock), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK == + GNUNET_JSON_parse (json, + spec, + NULL, NULL)) + { + pgh->cb (pgh->cb_cls, + &hr, + description, + description_i18n, + unit, + &price, + image, + taxes, + total_stocked, + total_sold, + total_lost, + location, + next_restock); + GNUNET_JSON_parse_free (spec); + TALER_MERCHANT_product_get_cancel (pgh); + return; + } + hr.http_status = 0; + hr.ec = TALER_EC_INVALID_RESPONSE; + GNUNET_JSON_parse_free (spec); + break; + } + default: + /* unexpected response code */ + hr.ec = TALER_JSON_get_error_code (json); + 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) hr.ec); + break; + } + pgh->cb (pgh->cb_cls, + &hr, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + 0, + 0, + 0, + NULL, + GNUNET_TIME_UNIT_FOREVER_ABS); + TALER_MERCHANT_product_get_cancel (pgh); +} + + +/** + * Make a GET /product/$ID request to get details about an + * individual product. + * + * @param ctx the context + * @param backend_url HTTP base URL for the backend + * @param instance_id instance to query about its products, + * NULL to query the default instance + * @param product_id identifier of the product to inquire about + * @param cb function to call with the backend's product information + * @param cb_cls closure for @a cb + * @return the request handle; NULL upon error + */ +struct TALER_MERCHANT_ProductGetHandle * +TALER_MERCHANT_product_get ( + struct GNUNET_CURL_Context *ctx, + const char *backend_url, + const char *instance_id, + const char *product_id, + TALER_MERCHANT_ProductGetCallback cb, + void *cb_cls) +{ + struct TALER_MERCHANT_ProductGetHandle *pgh; + CURL *eh; + + pgh = GNUNET_new (struct TALER_MERCHANT_ProductGetHandle); + pgh->ctx = ctx; + pgh->cb = cb; + pgh->cb_cls = cb_cls; + { + char *path; + + if (NULL == instance_id) + GNUNET_asprintf (&path, + "products/%s", + product_id); + else + GNUNET_asprintf (&path, + "instances/%s/products/%s", + instance_id, + product_id); + pgh->url = TALER_url_join (backend_url, + path, + NULL); + GNUNET_free (path); + } + if (NULL == pgh->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (pgh); + return NULL; + } + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Requesting URL '%s'\n", + pgh->url); + eh = curl_easy_init (); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_URL, + pgh->url)); + pgh->job = GNUNET_CURL_job_add (ctx, + eh, + GNUNET_YES, + &handle_get_product_finished, + pgh); + return pgh; +} + + +/** + * Cancel GET /product/$ID request. Must not be called by clients after + * the callback was invoked. + * + * @param pgh request to cancel. + */ +void +TALER_MERCHANT_product_get_cancel ( + struct TALER_MERCHANT_ProductGetHandle *pgh) +{ + if (NULL != pgh->job) + GNUNET_CURL_job_cancel (pgh->job); + GNUNET_free (pgh->url); + GNUNET_free (pgh); +} |