From d8e64ae258b911d4243a0fd62e46585f54bb445b Mon Sep 17 00:00:00 2001 From: Jonathan Buchanan Date: Mon, 17 Aug 2020 21:03:45 -0400 Subject: testing and lib sources for new endpoint --- src/lib/merchant_api_wallet_post_order_refund.c | 448 ++++++++++++++++++++++++ 1 file changed, 448 insertions(+) create mode 100644 src/lib/merchant_api_wallet_post_order_refund.c (limited to 'src/lib/merchant_api_wallet_post_order_refund.c') diff --git a/src/lib/merchant_api_wallet_post_order_refund.c b/src/lib/merchant_api_wallet_post_order_refund.c new file mode 100644 index 00000000..2c63dc17 --- /dev/null +++ b/src/lib/merchant_api_wallet_post_order_refund.c @@ -0,0 +1,448 @@ +/* + This file is part of TALER + Copyright (C) 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 + +*/ +/** + * @file lib/merchant_api_wallet_post_order_refund.c + * @brief Implementation of the (public) POST /orders/ID/refund request + * @author Jonathan Buchanan + */ +#include "platform.h" +#include +#include +#include /* just for HTTP status codes */ +#include +#include +#include "taler_merchant_service.h" +#include +#include +#include + + +/** + * Handle for a (public) POST /orders/ID/refund operation. + */ +struct TALER_MERCHANT_WalletOrderRefundHandle +{ + /** + * Complete URL where the backend offers /refund + */ + char *url; + + /** + * Minor context that holds body and headers. + */ + struct TALER_CURL_PostContext post_ctx; + + /** + * The CURL context to connect to the backend + */ + struct GNUNET_CURL_Context *ctx; + + /** + * The callback to pass the backend response to + */ + TALER_MERCHANT_WalletRefundCallback cb; + + /** + * Clasure to pass to the callback + */ + void *cb_cls; + + /** + * Handle for the request + */ + struct GNUNET_CURL_Job *job; +}; + + +/** + * Convenience function to call the callback in @a owgh with an error code of + * @a ec and the exchange body being set to @a reply. + * + * @param owgh handle providing callback + * @param ec error code to return to application + * @param reply JSON reply we got from the exchange, can be NULL + */ +static void +cb_failure (struct TALER_MERCHANT_WalletOrderRefundHandle *orh, + enum TALER_ErrorCode ec, + const json_t *reply) +{ + struct TALER_MERCHANT_HttpResponse hr = { + .ec = TALER_EC_CHECK_PAYMENT_RESPONSE_MALFORMED, + .reply = reply + }; + + orh->cb (orh->cb_cls, + &hr, + NULL, + NULL, + NULL, + 0); +} + + +/** + * Callback to process (public) POST /orders/ID/refund response + * + * @param cls the `struct TALER_MERCHANT_OrderRefundHandle` + * @param response_code HTTP response code, 0 on error + * @param json response body, NULL if not JSON + */ +static void +handle_refund_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_MERCHANT_WalletOrderRefundHandle *orh = cls; + const json_t *json = response; + struct TALER_MERCHANT_HttpResponse hr = { + .http_status = (unsigned int) response_code, + .reply = json + }; + + orh->job = NULL; + + switch (response_code) + { + case 0: + hr.ec = TALER_EC_INVALID_RESPONSE; + orh->cb (orh->cb_cls, + &hr, + NULL, + NULL, + NULL, + 0); + break; + case MHD_HTTP_OK: + { + struct TALER_Amount refund_amount; + json_t *refunds; + struct TALER_MerchantPublicKeyP merchant_pub; + unsigned int refund_len; + struct GNUNET_JSON_Specification spec[] = { + TALER_JSON_spec_amount ("refund_amount", + &refund_amount), + GNUNET_JSON_spec_json ("refunds", + &refunds), + GNUNET_JSON_spec_fixed_auto ("merchant_pub", + &merchant_pub), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (json, + spec, + NULL, NULL)) + { + GNUNET_break_op (0); + cb_failure (orh, + TALER_EC_CHECK_PAYMENT_RESPONSE_MALFORMED, + json); + TALER_MERCHANT_wallet_post_order_refund_cancel (orh); + return; + } + + if (! json_is_array (refunds)) + { + GNUNET_break_op (0); + cb_failure (orh, + TALER_EC_CHECK_PAYMENT_RESPONSE_MALFORMED, + json); + GNUNET_JSON_parse_free (spec); + TALER_MERCHANT_wallet_post_order_refund_cancel (orh); + return; + } + + refund_len = json_array_size (refunds); + { + struct TALER_MERCHANT_RefundDetail rds[refund_len]; + + memset (rds, + 0, + sizeof (rds)); + for (unsigned int i = 0; iexchange_sig), + GNUNET_JSON_spec_fixed_auto ("exchange_pub", + &rd->exchange_pub), + GNUNET_JSON_spec_uint64 ("rtransaction_id", + &rd->rtransaction_id), + GNUNET_JSON_spec_fixed_auto ("coin_pub", + &rd->coin_pub), + TALER_JSON_spec_amount ("refund_amount", + &rd->refund_amount), + GNUNET_JSON_spec_end () + }; + + ret = GNUNET_JSON_parse (jrefund, + rspec, + NULL, NULL); + if (GNUNET_OK == ret) + { + /* check that type field is correct */ + if (0 != strcmp ("success", refund_status_type)) + { + GNUNET_break_op (0); + ret = GNUNET_SYSERR; + } + } + } + else + { + struct GNUNET_JSON_Specification rspec[] = { + GNUNET_JSON_spec_string ("type", + &refund_status_type), + GNUNET_JSON_spec_fixed_auto ("coin_pub", + &rd->coin_pub), + GNUNET_JSON_spec_uint64 ("rtransaction_id", + &rd->rtransaction_id), + TALER_JSON_spec_amount ("refund_amount", + &rd->refund_amount), + GNUNET_JSON_spec_end () + }; + + ret = GNUNET_JSON_parse (jrefund, + rspec, + NULL, NULL); + if (GNUNET_OK == ret) + { + /* parse optional arguments */ + json_t *jec; + + jec = json_object_get (jrefund, + "exchange_code"); + if (NULL != jec) + { + if (! json_is_integer (jec)) + { + GNUNET_break_op (0); + ret = GNUNET_SYSERR; + } + else + { + rd->hr.ec = (enum TALER_ErrorCode) json_integer_value (jec); + } + } + rd->hr.reply = json_object_get (jrefund, + "exchange_reply"); + /* check that type field is correct */ + if (0 != strcmp ("failure", refund_status_type)) + { + GNUNET_break_op (0); + ret = GNUNET_SYSERR; + } + } + } + if (GNUNET_OK != ret) + { + GNUNET_break_op (0); + cb_failure (orh, + TALER_EC_CHECK_PAYMENT_RESPONSE_MALFORMED, + json); + TALER_MERCHANT_wallet_post_order_refund_cancel (orh); + return; + } + rd->hr.http_status = exchange_status; + } + + { + struct TALER_MERCHANT_HttpResponse hr = { + .reply = json, + .http_status = MHD_HTTP_OK + }; + + orh->cb (orh->cb_cls, + &hr, + &refund_amount, + &merchant_pub, + rds, + refund_len); + } + } + GNUNET_JSON_parse_free (spec); + } + break; + case MHD_HTTP_NO_CONTENT: + orh->cb (orh->cb_cls, + &hr, + NULL, + NULL, + NULL, + 0); + break; + case MHD_HTTP_CONFLICT: + case MHD_HTTP_NOT_FOUND: + hr.ec = TALER_JSON_get_error_code (json); + hr.hint = TALER_JSON_get_error_hint (json); + orh->cb (orh->cb_cls, + &hr, + NULL, + NULL, + NULL, + 0); + break; + default: + GNUNET_break_op (0); /* unexpected status code */ + TALER_MERCHANT_parse_error_details_ (json, + response_code, + &hr); + orh->cb (orh->cb_cls, + &hr, + NULL, + NULL, + NULL, + 0); + break; + } + TALER_MERCHANT_wallet_post_order_refund_cancel (orh); +} + + +/** + * Obtain the refunds that have been granted for an order. + * + * @param ctx the CURL context used to connect to the backend + * @param backend_url backend's base URL, including final "/" + * @param order_id id of the order whose refund is to be increased + * @param h_contract_terms hash of the contract terms of the order + * @param cb callback processing the response from /refund + * @param cb_cls closure for cb + */ +struct TALER_MERCHANT_WalletOrderRefundHandle * +TALER_MERCHANT_wallet_post_order_refund ( + struct GNUNET_CURL_Context *ctx, + const char *backend_url, + const char *order_id, + const struct GNUNET_HashCode *h_contract_terms, + TALER_MERCHANT_WalletRefundCallback cb, + void *cb_cls) +{ + struct TALER_MERCHANT_WalletOrderRefundHandle *orh; + json_t *req; + CURL *eh; + + orh = GNUNET_new (struct TALER_MERCHANT_WalletOrderRefundHandle); + orh->ctx = ctx; + orh->cb = cb; + orh->cb_cls = cb_cls; + { + char *path; + + GNUNET_asprintf (&path, + "orders/%s/refund", + order_id); + orh->url = TALER_url_join (backend_url, + path, + NULL); + GNUNET_free (path); + } + if (NULL == orh->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (orh); + return NULL; + } + req = json_pack ("{s:o}", + "h_contract", + GNUNET_JSON_from_data_auto (h_contract_terms)); + GNUNET_assert (NULL != req); + eh = curl_easy_init (); + GNUNET_assert (NULL != eh); + if (GNUNET_OK != + TALER_curl_easy_post (&orh->post_ctx, + eh, + req)) + { + GNUNET_break (0); + json_decref (req); + GNUNET_free (orh->url); + GNUNET_free (orh); + return NULL; + } + json_decref (req); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_URL, + orh->url)); + orh->job = GNUNET_CURL_job_add2 (ctx, + eh, + orh->post_ctx.headers, + &handle_refund_finished, + orh); + if (NULL == orh->job) + { + GNUNET_free (orh->url); + GNUNET_free (orh); + return NULL; + } + return orh; +} + + +/** + * Cancel a (public) POST /refund request. + * + * @param orh the refund operation to cancel + */ +void +TALER_MERCHANT_wallet_post_order_refund_cancel ( + struct TALER_MERCHANT_WalletOrderRefundHandle *orh) +{ + if (NULL != orh->job) + { + GNUNET_CURL_job_cancel (orh->job); + orh->job = NULL; + } + TALER_curl_easy_post_finished (&orh->post_ctx); + GNUNET_free (orh->url); + GNUNET_free (orh); +} + + +/* end of merchant_api_wallet_post_order_refund.c */ -- cgit v1.2.3