From 8919c5664bd46cba5952f34f4914d5ccb01e452a Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Tue, 12 May 2020 23:56:24 +0200 Subject: implement merchant_api_post_transfers.c --- .../taler-merchant-httpd_private-post-transfers.c | 2 +- src/include/taler_merchant_service.h | 8 +- src/lib/Makefile.am | 7 +- src/lib/merchant_api_get_transfers.c | 314 ++++++++++++++++++++ src/lib/merchant_api_post_transfers.c | 326 +++++++++++++++++++++ src/lib/merchant_api_track_transfer.c | 314 -------------------- 6 files changed, 649 insertions(+), 322 deletions(-) create mode 100644 src/lib/merchant_api_get_transfers.c create mode 100644 src/lib/merchant_api_post_transfers.c delete mode 100644 src/lib/merchant_api_track_transfer.c (limited to 'src') diff --git a/src/backend/taler-merchant-httpd_private-post-transfers.c b/src/backend/taler-merchant-httpd_private-post-transfers.c index 519e69f5..0b9b6728 100644 --- a/src/backend/taler-merchant-httpd_private-post-transfers.c +++ b/src/backend/taler-merchant-httpd_private-post-transfers.c @@ -885,7 +885,7 @@ queue: { /* First request, parse it! */ struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_string ("exchange", + GNUNET_JSON_spec_string ("exchange_url", &ptc->exchange_url), GNUNET_JSON_spec_string ("payto_uri", &ptc->payto_uri), diff --git a/src/include/taler_merchant_service.h b/src/include/taler_merchant_service.h index 1e62f4ed..7c51d1c0 100644 --- a/src/include/taler_merchant_service.h +++ b/src/include/taler_merchant_service.h @@ -2196,14 +2196,14 @@ struct TALER_MERCHANT_TrackTransferDetail * @param details array with details about the combined transactions */ typedef void -(*TALER_MERCHANT_TrackTransferCallback) ( +(*TALER_MERCHANT_PostTransfersCallback) ( void *cls, const struct TALER_MERCHANT_HttpResponse *hr, struct GNUNET_TIME_Absolute execution_time, const struct TALER_Amount *total_amount, const struct TALER_Amount *wire_fee, unsigned int details_length, - const struct TALER_MERCHANT_TrackTransferDetails details[]); + const struct TALER_MERCHANT_TrackTransferDetail details[]); /** @@ -2229,7 +2229,7 @@ TALER_MERCHANT_transfers_post ( const struct TALER_WireTransferIdentifierRawP *wtid, const char *payto_uri, const char *exchange_url, - TALER_MERCHANT_TrackTransferCallback cb, + TALER_MERCHANT_PostTransfersCallback cb, void *cls); @@ -2345,7 +2345,7 @@ typedef void * @return a handle for this request */ struct TALER_MERCHANT_GetTransfersHandle * -TALER_MERCHANT_transfers_post ( +TALER_MERCHANT_transfers_get ( struct GNUNET_CURL_Context *ctx, const char *backend_url, const char *payto_uri, diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am index 96ee166a..e0d164db 100644 --- a/src/lib/Makefile.am +++ b/src/lib/Makefile.am @@ -27,19 +27,20 @@ libtalermerchant_la_SOURCES = \ merchant_api_patch_instance.c \ merchant_api_patch_product.c \ merchant_api_post_instances.c \ - merchant_api_post_products.c \ merchant_api_post_orders.c \ merchant_api_post_order_abort.c \ merchant_api_post_order_claim.c \ merchant_api_post_order_pay.c \ merchant_api_post_order_refund.c \ + merchant_api_post_products.c \ + merchant_api_post_transfers.c \ \ merchant_api_tip_authorize.c \ merchant_api_tip_pickup.c \ merchant_api_tip_pickup2.c \ merchant_api_tip_query.c \ - merchant_api_track_transaction.c \ - merchant_api_track_transfer.c + merchant_api_track_transaction.c +# merchant_api_get_transfers.c # merchant_api_get_order.c \ # merchant_api_get_order2.c \ # merchant_api_get_order3.c diff --git a/src/lib/merchant_api_get_transfers.c b/src/lib/merchant_api_get_transfers.c new file mode 100644 index 00000000..5743f2fe --- /dev/null +++ b/src/lib/merchant_api_get_transfers.c @@ -0,0 +1,314 @@ +/* + This file is part of TALER + Copyright (C) 2014-2017, 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_track_transfer.c + * @brief Implementation of the /track/transfer request of the + * merchant's HTTP API + * @author Marcello Stanisci + * @author Christian Grothoff + */ +#include "platform.h" +#include +#include +#include /* just for HTTP status codes */ +#include +#include +#include "taler_merchant_service.h" +#include +#include + + +/** + * @brief A Handle for tracking wire transfers. + */ +struct TALER_MERCHANT_TrackTransferHandle +{ + + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_MERCHANT_TrackTransferCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Reference to the execution context. + */ + struct GNUNET_CURL_Context *ctx; +}; + + +/** + * We got a #MHD_HTTP_OK response for the /track/transfer request. + * Check that the response is well-formed and if it is, call the + * callback. If not, return an error code. + * + * This code is very similar to + * exchange_api_transfers_get.c::check_transfers_get_response_ok. + * (Except we do not check the signature, as that was done by the + * backend which we trust already.) + * Any changes should likely be reflected there as well. + * + * @param wdh handle to the operation + * @param json response we got + * @return #GNUNET_OK if we are done and all is well, + * #GNUNET_SYSERR if the response was bogus + */ +static int +check_transfers_get_response_ok ( + struct TALER_MERCHANT_TrackTransferHandle *wdh, + const json_t *json) +{ + json_t *deposits; + struct GNUNET_HashCode h_wire; + struct TALER_Amount total_amount; + struct TALER_MerchantPublicKeyP merchant_pub; + unsigned int num_details; + struct TALER_ExchangePublicKeyP exchange_pub; + struct GNUNET_JSON_Specification inner_spec[] = { + TALER_JSON_spec_amount ("total", &total_amount), + GNUNET_JSON_spec_fixed_auto ("merchant_pub", &merchant_pub), + GNUNET_JSON_spec_fixed_auto ("h_wire", &h_wire), + GNUNET_JSON_spec_json ("deposits_sums", &deposits), + GNUNET_JSON_spec_fixed_auto ("exchange_pub", &exchange_pub), + GNUNET_JSON_spec_end () + }; + struct TALER_MERCHANT_HttpResponse hr = { + .http_status = MHD_HTTP_OK, + .reply = json + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (json, + inner_spec, + NULL, NULL)) + { + GNUNET_break_op (0); + return GNUNET_SYSERR; + } + num_details = json_array_size (deposits); + { + struct TALER_MERCHANT_TrackTransferDetails details[num_details]; + + for (unsigned int i = 0; iorder_id), + TALER_JSON_spec_amount ("deposit_value", &detail->deposit_value), + TALER_JSON_spec_amount ("deposit_fee", &detail->deposit_fee), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (deposit, + spec_detail, + NULL, NULL)) + { + GNUNET_break_op (0); + GNUNET_JSON_parse_free (inner_spec); + return GNUNET_SYSERR; + } + } + wdh->cb (wdh->cb_cls, + &hr, + &exchange_pub, + &h_wire, + &total_amount, + num_details, + details); + } + GNUNET_JSON_parse_free (inner_spec); + return GNUNET_OK; +} + + +/** + * Function called when we're done processing the + * HTTP /track/transfer request. + * + * @param cls the `struct TALER_MERCHANT_TrackTransferHandle` + * @param response_code HTTP response code, 0 on error + * @param json response body, NULL if not in JSON + */ +static void +handle_transfers_get_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_MERCHANT_TrackTransferHandle *tdo = cls; + const json_t *json = response; + struct TALER_MERCHANT_HttpResponse hr = { + .http_status = (unsigned int) response_code, + .reply = json + }; + + tdo->job = NULL; + switch (response_code) + { + case 0: + hr.ec = TALER_EC_INVALID_RESPONSE; + break; + case MHD_HTTP_OK: + if (GNUNET_OK == + check_transfers_get_response_ok (tdo, + json)) + { + TALER_MERCHANT_track_transfer_cancel (tdo); + return; + } + GNUNET_break_op (0); + hr.http_status = 0; + hr.ec = TALER_EC_INVALID_RESPONSE; // TODO: use more specific code! + break; + case MHD_HTTP_FAILED_DEPENDENCY: + /* Not a reason to break execution. */ + TALER_MERCHANT_parse_error_details_ (json, + response_code, + &hr); + break; + case MHD_HTTP_NOT_FOUND: + /* Nothing really to verify, this should never + happen, we should pass the JSON reply to the application */ + hr.ec = TALER_JSON_get_error_code (json); + hr.hint = TALER_JSON_get_error_hint (json); + break; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + hr.ec = TALER_JSON_get_error_code (json); + hr.hint = TALER_JSON_get_error_hint (json); + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + TALER_MERCHANT_parse_error_details_ (json, + response_code, + &hr); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d\n", + (unsigned int) response_code, + (int) hr.ec); + response_code = 0; + break; + } + tdo->cb (tdo->cb_cls, + &hr, + NULL, + NULL, + NULL, + 0, + NULL); + TALER_MERCHANT_track_transfer_cancel (tdo); +} + + +/** + * Request backend to return transfers associated with a given wtid. + * + * @param ctx execution context + * @param backend_url base URL of the backend + * @param wire_method wire method used for the wire transfer + * @param wtid base32 string indicating a wtid + * @param exchange_url base URL of the exchange in charge of returning the wanted information + * @param track_transfer_cb the callback to call when a reply for this request is available + * @param track_transfer_cb_cls closure for @a contract_cb + * @return a handle for this request + */ +struct TALER_MERCHANT_TrackTransferHandle * +TALER_MERCHANT_track_transfer ( + struct GNUNET_CURL_Context *ctx, + const char *backend_url, + const char *wire_method, + const struct TALER_WireTransferIdentifierRawP *wtid, + const char *exchange_url, + TALER_MERCHANT_TrackTransferCallback track_transfer_cb, + void *track_transfer_cb_cls) +{ + struct TALER_MERCHANT_TrackTransferHandle *tdo; + CURL *eh; + char *wtid_str; + + wtid_str = GNUNET_STRINGS_data_to_string_alloc ( + wtid, + sizeof (struct TALER_WireTransferIdentifierRawP)); + tdo = GNUNET_new (struct TALER_MERCHANT_TrackTransferHandle); + tdo->ctx = ctx; + tdo->cb = track_transfer_cb; // very last to be called + tdo->cb_cls = track_transfer_cb_cls; + tdo->url = TALER_url_join (backend_url, "track/transfer", + "wtid", wtid_str, + "exchange", exchange_url, + "wire_method", wire_method, + NULL); + GNUNET_free (wtid_str); + if (NULL == tdo->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (tdo); + return NULL; + } + eh = curl_easy_init (); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_URL, + tdo->url)); + tdo->job = GNUNET_CURL_job_add (ctx, + eh, + GNUNET_YES, + &handle_transfers_get_finished, + tdo); + return tdo; +} + + +/** + * Cancel a /track/transfer request. This function cannot be used + * on a request handle if a response is already served for it. + * + * @param tdo handle to the tracking operation being cancelled + */ +void +TALER_MERCHANT_track_transfer_cancel ( + struct TALER_MERCHANT_TrackTransferHandle *tdo) +{ + if (NULL != tdo->job) + { + GNUNET_CURL_job_cancel (tdo->job); + tdo->job = NULL; + } + GNUNET_free (tdo->url); + GNUNET_free (tdo); +} + + +/* end of merchant_api_track_transfer.c */ diff --git a/src/lib/merchant_api_post_transfers.c b/src/lib/merchant_api_post_transfers.c new file mode 100644 index 00000000..2583dbe7 --- /dev/null +++ b/src/lib/merchant_api_post_transfers.c @@ -0,0 +1,326 @@ +/* + This file is part of TALER + Copyright (C) 2014, 2015, 2016, 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_post_transfers.c + * @brief Implementation of the POST /transfers request of the merchant's HTTP API + * @author Marcello Stanisci + * @author Christian Grothoff + */ +#include "platform.h" +#include +#include +#include /* just for HTTP status codes */ +#include +#include "taler_merchant_service.h" +#include +#include + + +/** + * @brief A handle for POSTing transfer data. + */ +struct TALER_MERCHANT_PostTransfersHandle +{ + + /** + * The url for this request. + */ + char *url; + + /** + * Handle for the request. + */ + struct GNUNET_CURL_Job *job; + + /** + * Function to call with the result. + */ + TALER_MERCHANT_PostTransfersCallback cb; + + /** + * Closure for @a cb. + */ + void *cb_cls; + + /** + * Reference to the execution context. + */ + struct GNUNET_CURL_Context *ctx; + + /** + * Minor context that holds body and headers. + */ + struct TALER_CURL_PostContext post_ctx; + +}; + + +/** + * Function called when we're done processing the + * HTTP POST /transfers request. + * + * @param cls the `struct TALER_MERCHANT_PostTransfersHandle` + * @param response_code HTTP response code, 0 on error + * @param json response body, NULL if not in JSON + */ +static void +handle_post_transfers_finished (void *cls, + long response_code, + const void *response) +{ + struct TALER_MERCHANT_PostTransfersHandle *pth = cls; + const json_t *json = response; + struct TALER_MERCHANT_HttpResponse hr = { + .http_status = (unsigned int) response_code, + .reply = json + }; + + pth->job = NULL; + switch (response_code) + { + case 0: + hr.ec = TALER_EC_INVALID_RESPONSE; + break; + case MHD_HTTP_OK: + { + struct TALER_Amount total; + struct TALER_Amount wire_fee; + struct GNUNET_TIME_Absolute execution_time; + json_t *deposit_sums; + struct GNUNET_JSON_Specification spec[] = { + TALER_JSON_spec_amount ("total", + &total), + TALER_JSON_spec_amount ("wire_fee", + &wire_fee), + GNUNET_JSON_spec_absolute_time ("execution_time", + &execution_time), + GNUNET_JSON_spec_json ("deposit_sums", + &deposit_sums), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (json, + spec, + NULL, NULL)) + { + GNUNET_break_op (0); + hr.http_status = 0; + hr.ec = TALER_EC_INVALID_RESPONSE; + break; + } + else + { + size_t deposit_sums_length; + struct TALER_MERCHANT_TrackTransferDetail *details; + json_t *deposit_sum; + unsigned int i; + bool ok; + + if (! json_is_array (deposit_sums)) + { + GNUNET_break_op (0); + GNUNET_JSON_parse_free (spec); + hr.http_status = 0; + hr.ec = TALER_EC_INVALID_RESPONSE; + break; + } + deposit_sums_length = json_array_size (deposit_sums); + details = GNUNET_new_array (deposit_sums_length, + struct TALER_MERCHANT_TrackTransferDetail); + ok = true; + json_array_foreach (deposit_sums, i, deposit_sum) { + struct TALER_MERCHANT_TrackTransferDetail *d = &details[i]; + struct GNUNET_JSON_Specification ispec[] = { + TALER_JSON_spec_amount ("total", + &d->deposit_value), + TALER_JSON_spec_amount ("deposit_fee", + &d->deposit_fee), + GNUNET_JSON_spec_string ("order_id", + &d->order_id), + GNUNET_JSON_spec_end () + }; + + if (GNUNET_OK != + GNUNET_JSON_parse (json, + ispec, + NULL, NULL)) + { + GNUNET_break_op (0); + ok = false; + break; + } + } + + if (! ok) + { + GNUNET_break_op (0); + GNUNET_free (details); + GNUNET_JSON_parse_free (spec); + hr.http_status = 0; + hr.ec = TALER_EC_INVALID_RESPONSE; + break; + } + pth->cb (pth->cb_cls, + &hr, + execution_time, + &total, + &wire_fee, + deposit_sums_length, + details); + GNUNET_free (details); + GNUNET_JSON_parse_free (spec); + TALER_MERCHANT_transfers_post_cancel (pth); + return; + } + } + case MHD_HTTP_ACCEPTED: + break; + case MHD_HTTP_NOT_FOUND: + /* Nothing really to verify, this should never + happen, we should pass the JSON reply to the application */ + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Did not find any data\n"); + hr.ec = TALER_JSON_get_error_code (json); + hr.hint = TALER_JSON_get_error_hint (json); + break; + case MHD_HTTP_INTERNAL_SERVER_ERROR: + /* Server had an internal issue; we should retry, but this API + leaves this to the application */ + hr.ec = TALER_JSON_get_error_code (json); + hr.hint = TALER_JSON_get_error_hint (json); + break; + default: + /* unexpected response code */ + GNUNET_break_op (0); + TALER_MERCHANT_parse_error_details_ (json, + response_code, + &hr); + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Unexpected response code %u/%d\n", + (unsigned int) response_code, + (int) hr.ec); + break; + } + pth->cb (pth->cb_cls, + &hr, + GNUNET_TIME_UNIT_FOREVER_ABS, + NULL, + NULL, + 0, + NULL); + TALER_MERCHANT_transfers_post_cancel (pth); +} + + +/** + * Request backend to remember that we received the given + * wire transfer and to request details about the aggregated + * transactions from the exchange. + * + * @param ctx execution context + * @param backend_url base URL of the backend + * @param credit_amount how much money did we receive (without wire fee) + * @param wtid base32 string indicating a wtid + * @param payto_uri which account was credited by the wire transfer + * @param exchange_url what is the URL of the exchange that made the transfer + * @param cb the callback to call when a reply for this request is available + * @param cb_cls closure for @a cb + * @return a handle for this request + */ +struct TALER_MERCHANT_PostTransfersHandle * +TALER_MERCHANT_transfers_post ( + struct GNUNET_CURL_Context *ctx, + const char *backend_url, + const struct TALER_Amount *credit_amount, + const struct TALER_WireTransferIdentifierRawP *wtid, + const char *payto_uri, + const char *exchange_url, + TALER_MERCHANT_PostTransfersCallback cb, + void *cb_cls) +{ + struct TALER_MERCHANT_PostTransfersHandle *pth; + CURL *eh; + json_t *req; + + pth = GNUNET_new (struct TALER_MERCHANT_PostTransfersHandle); + pth->ctx = ctx; + pth->cb = cb; + pth->cb_cls = cb_cls; + pth->url = TALER_url_join (backend_url, + "transfers", + NULL); + if (NULL == pth->url) + { + GNUNET_log (GNUNET_ERROR_TYPE_ERROR, + "Could not construct request URL.\n"); + GNUNET_free (pth); + return NULL; + } + req = json_pack ("{s:o, s:o, s:s, s:s}", + "credit_amount", TALER_JSON_from_amount (credit_amount), + "wtid", GNUNET_JSON_from_data_auto (wtid), + "payto_uri", payto_uri, + "exchange_url", "exchange_url"); + GNUNET_assert (NULL != req); + eh = curl_easy_init (); + GNUNET_assert (NULL != eh); + if (GNUNET_OK != TALER_curl_easy_post (&pth->post_ctx, + eh, + req)) + { + GNUNET_break (0); + json_decref (req); + GNUNET_free (pth); + return NULL; + } + json_decref (req); + GNUNET_assert (CURLE_OK == + curl_easy_setopt (eh, + CURLOPT_URL, + pth->url)); + pth->job = GNUNET_CURL_job_add2 (ctx, + eh, + pth->post_ctx.headers, + &handle_post_transfers_finished, + pth); + return pth; +} + + +/** + * Cancel a POST /transfers request. This function cannot be used + * on a request handle if a response is already served for it. + * + * @param pth handle to the tracking operation being cancelled + */ +void +TALER_MERCHANT_transfers_post_cancel ( + struct TALER_MERCHANT_PostTransfersHandle *pth) +{ + if (NULL != pth->job) + { + GNUNET_CURL_job_cancel (pth->job); + pth->job = NULL; + } + GNUNET_free (pth->url); + TALER_curl_easy_post_finished (&pth->post_ctx); + GNUNET_free (pth); +} + + +/* end of merchant_api_post_transfers.c */ diff --git a/src/lib/merchant_api_track_transfer.c b/src/lib/merchant_api_track_transfer.c deleted file mode 100644 index 5743f2fe..00000000 --- a/src/lib/merchant_api_track_transfer.c +++ /dev/null @@ -1,314 +0,0 @@ -/* - This file is part of TALER - Copyright (C) 2014-2017, 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_track_transfer.c - * @brief Implementation of the /track/transfer request of the - * merchant's HTTP API - * @author Marcello Stanisci - * @author Christian Grothoff - */ -#include "platform.h" -#include -#include -#include /* just for HTTP status codes */ -#include -#include -#include "taler_merchant_service.h" -#include -#include - - -/** - * @brief A Handle for tracking wire transfers. - */ -struct TALER_MERCHANT_TrackTransferHandle -{ - - /** - * The url for this request. - */ - char *url; - - /** - * Handle for the request. - */ - struct GNUNET_CURL_Job *job; - - /** - * Function to call with the result. - */ - TALER_MERCHANT_TrackTransferCallback cb; - - /** - * Closure for @a cb. - */ - void *cb_cls; - - /** - * Reference to the execution context. - */ - struct GNUNET_CURL_Context *ctx; -}; - - -/** - * We got a #MHD_HTTP_OK response for the /track/transfer request. - * Check that the response is well-formed and if it is, call the - * callback. If not, return an error code. - * - * This code is very similar to - * exchange_api_transfers_get.c::check_transfers_get_response_ok. - * (Except we do not check the signature, as that was done by the - * backend which we trust already.) - * Any changes should likely be reflected there as well. - * - * @param wdh handle to the operation - * @param json response we got - * @return #GNUNET_OK if we are done and all is well, - * #GNUNET_SYSERR if the response was bogus - */ -static int -check_transfers_get_response_ok ( - struct TALER_MERCHANT_TrackTransferHandle *wdh, - const json_t *json) -{ - json_t *deposits; - struct GNUNET_HashCode h_wire; - struct TALER_Amount total_amount; - struct TALER_MerchantPublicKeyP merchant_pub; - unsigned int num_details; - struct TALER_ExchangePublicKeyP exchange_pub; - struct GNUNET_JSON_Specification inner_spec[] = { - TALER_JSON_spec_amount ("total", &total_amount), - GNUNET_JSON_spec_fixed_auto ("merchant_pub", &merchant_pub), - GNUNET_JSON_spec_fixed_auto ("h_wire", &h_wire), - GNUNET_JSON_spec_json ("deposits_sums", &deposits), - GNUNET_JSON_spec_fixed_auto ("exchange_pub", &exchange_pub), - GNUNET_JSON_spec_end () - }; - struct TALER_MERCHANT_HttpResponse hr = { - .http_status = MHD_HTTP_OK, - .reply = json - }; - - if (GNUNET_OK != - GNUNET_JSON_parse (json, - inner_spec, - NULL, NULL)) - { - GNUNET_break_op (0); - return GNUNET_SYSERR; - } - num_details = json_array_size (deposits); - { - struct TALER_MERCHANT_TrackTransferDetails details[num_details]; - - for (unsigned int i = 0; iorder_id), - TALER_JSON_spec_amount ("deposit_value", &detail->deposit_value), - TALER_JSON_spec_amount ("deposit_fee", &detail->deposit_fee), - GNUNET_JSON_spec_end () - }; - - if (GNUNET_OK != - GNUNET_JSON_parse (deposit, - spec_detail, - NULL, NULL)) - { - GNUNET_break_op (0); - GNUNET_JSON_parse_free (inner_spec); - return GNUNET_SYSERR; - } - } - wdh->cb (wdh->cb_cls, - &hr, - &exchange_pub, - &h_wire, - &total_amount, - num_details, - details); - } - GNUNET_JSON_parse_free (inner_spec); - return GNUNET_OK; -} - - -/** - * Function called when we're done processing the - * HTTP /track/transfer request. - * - * @param cls the `struct TALER_MERCHANT_TrackTransferHandle` - * @param response_code HTTP response code, 0 on error - * @param json response body, NULL if not in JSON - */ -static void -handle_transfers_get_finished (void *cls, - long response_code, - const void *response) -{ - struct TALER_MERCHANT_TrackTransferHandle *tdo = cls; - const json_t *json = response; - struct TALER_MERCHANT_HttpResponse hr = { - .http_status = (unsigned int) response_code, - .reply = json - }; - - tdo->job = NULL; - switch (response_code) - { - case 0: - hr.ec = TALER_EC_INVALID_RESPONSE; - break; - case MHD_HTTP_OK: - if (GNUNET_OK == - check_transfers_get_response_ok (tdo, - json)) - { - TALER_MERCHANT_track_transfer_cancel (tdo); - return; - } - GNUNET_break_op (0); - hr.http_status = 0; - hr.ec = TALER_EC_INVALID_RESPONSE; // TODO: use more specific code! - break; - case MHD_HTTP_FAILED_DEPENDENCY: - /* Not a reason to break execution. */ - TALER_MERCHANT_parse_error_details_ (json, - response_code, - &hr); - break; - case MHD_HTTP_NOT_FOUND: - /* Nothing really to verify, this should never - happen, we should pass the JSON reply to the application */ - hr.ec = TALER_JSON_get_error_code (json); - hr.hint = TALER_JSON_get_error_hint (json); - break; - case MHD_HTTP_INTERNAL_SERVER_ERROR: - /* Server had an internal issue; we should retry, but this API - leaves this to the application */ - hr.ec = TALER_JSON_get_error_code (json); - hr.hint = TALER_JSON_get_error_hint (json); - break; - default: - /* unexpected response code */ - GNUNET_break_op (0); - TALER_MERCHANT_parse_error_details_ (json, - response_code, - &hr); - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "Unexpected response code %u/%d\n", - (unsigned int) response_code, - (int) hr.ec); - response_code = 0; - break; - } - tdo->cb (tdo->cb_cls, - &hr, - NULL, - NULL, - NULL, - 0, - NULL); - TALER_MERCHANT_track_transfer_cancel (tdo); -} - - -/** - * Request backend to return transfers associated with a given wtid. - * - * @param ctx execution context - * @param backend_url base URL of the backend - * @param wire_method wire method used for the wire transfer - * @param wtid base32 string indicating a wtid - * @param exchange_url base URL of the exchange in charge of returning the wanted information - * @param track_transfer_cb the callback to call when a reply for this request is available - * @param track_transfer_cb_cls closure for @a contract_cb - * @return a handle for this request - */ -struct TALER_MERCHANT_TrackTransferHandle * -TALER_MERCHANT_track_transfer ( - struct GNUNET_CURL_Context *ctx, - const char *backend_url, - const char *wire_method, - const struct TALER_WireTransferIdentifierRawP *wtid, - const char *exchange_url, - TALER_MERCHANT_TrackTransferCallback track_transfer_cb, - void *track_transfer_cb_cls) -{ - struct TALER_MERCHANT_TrackTransferHandle *tdo; - CURL *eh; - char *wtid_str; - - wtid_str = GNUNET_STRINGS_data_to_string_alloc ( - wtid, - sizeof (struct TALER_WireTransferIdentifierRawP)); - tdo = GNUNET_new (struct TALER_MERCHANT_TrackTransferHandle); - tdo->ctx = ctx; - tdo->cb = track_transfer_cb; // very last to be called - tdo->cb_cls = track_transfer_cb_cls; - tdo->url = TALER_url_join (backend_url, "track/transfer", - "wtid", wtid_str, - "exchange", exchange_url, - "wire_method", wire_method, - NULL); - GNUNET_free (wtid_str); - if (NULL == tdo->url) - { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "Could not construct request URL.\n"); - GNUNET_free (tdo); - return NULL; - } - eh = curl_easy_init (); - GNUNET_assert (CURLE_OK == - curl_easy_setopt (eh, - CURLOPT_URL, - tdo->url)); - tdo->job = GNUNET_CURL_job_add (ctx, - eh, - GNUNET_YES, - &handle_transfers_get_finished, - tdo); - return tdo; -} - - -/** - * Cancel a /track/transfer request. This function cannot be used - * on a request handle if a response is already served for it. - * - * @param tdo handle to the tracking operation being cancelled - */ -void -TALER_MERCHANT_track_transfer_cancel ( - struct TALER_MERCHANT_TrackTransferHandle *tdo) -{ - if (NULL != tdo->job) - { - GNUNET_CURL_job_cancel (tdo->job); - tdo->job = NULL; - } - GNUNET_free (tdo->url); - GNUNET_free (tdo); -} - - -/* end of merchant_api_track_transfer.c */ -- cgit v1.2.3