297 lines
8.3 KiB
C
297 lines
8.3 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014, 2015, 2016 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, If not, see
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<http://www.gnu.org/licenses/>
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*/
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/**
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* @file mint-lib/mint_api_wire_deposits.c
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* @brief Implementation of the /wire/deposits request of the mint's HTTP API
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <curl/curl.h>
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#include <jansson.h>
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#include <microhttpd.h> /* just for HTTP status codes */
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#include <gnunet/gnunet_util_lib.h>
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#include "taler_mint_service.h"
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#include "mint_api_common.h"
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#include "mint_api_json.h"
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#include "mint_api_context.h"
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#include "mint_api_handle.h"
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#include "taler_signatures.h"
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/**
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* @brief A /wire/deposits Handle
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*/
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struct TALER_MINT_WireDepositsHandle
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{
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/**
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* The connection to mint this request handle will use
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*/
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struct TALER_MINT_Handle *mint;
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/**
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* The url for this request.
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*/
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char *url;
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/**
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* JSON encoding of the request to POST.
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*/
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char *json_enc;
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/**
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* Handle for the request.
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*/
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struct MAC_Job *job;
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/**
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* Function to call with the result.
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*/
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TALER_MINT_WireDepositsCallback cb;
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/**
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* Closure for @a cb.
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*/
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void *cb_cls;
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/**
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* Download buffer
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*/
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struct MAC_DownloadBuffer db;
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};
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/**
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* Function called when we're done processing the
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* HTTP /wire/deposits request.
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*
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* @param cls the `struct TALER_MINT_WireDepositsHandle`
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* @param eh the curl request handle
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*/
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static void
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handle_wire_deposits_finished (void *cls,
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CURL *eh)
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{
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struct TALER_MINT_WireDepositsHandle *wdh = cls;
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long response_code;
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json_t *json;
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wdh->job = NULL;
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json = MAC_download_get_result (&wdh->db,
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eh,
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&response_code);
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switch (response_code)
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{
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case 0:
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break;
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case MHD_HTTP_OK:
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{
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json_t *details_j;
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struct GNUNET_HashCode h_wire;
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struct TALER_Amount total_amount;
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struct TALER_MerchantPublicKeyP merchant_pub;
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unsigned int num_details;
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struct MAJ_Specification spec[] = {
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MAJ_spec_fixed_auto ("H_wire", &h_wire),
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MAJ_spec_fixed_auto ("merchant_pub", &merchant_pub),
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MAJ_spec_amount ("total_amount", &total_amount),
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MAJ_spec_json ("details", &details_j),
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MAJ_spec_end
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};
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if (GNUNET_OK !=
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MAJ_parse_json (json,
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spec))
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{
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GNUNET_break_op (0);
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response_code = 0;
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break;
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}
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num_details = json_array_size (details_j);
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{
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struct TALER_WireDepositDetails details[num_details];
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unsigned int i;
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for (i=0;i<num_details;i++)
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{
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struct TALER_WireDepositDetails *detail = &details[i];
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struct json_t *detail_j = json_array_get (details_j, i);
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struct MAJ_Specification spec_detail[] = {
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MAJ_spec_fixed_auto ("H_contract", &detail->h_contract),
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MAJ_spec_amount ("deposit_value", &detail->coin_value),
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MAJ_spec_amount ("deposit_fee", &detail->coin_fee),
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MAJ_spec_uint64 ("transaction_id", &detail->transaction_id),
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MAJ_spec_fixed_auto ("coin_pub", &detail->coin_pub),
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MAJ_spec_end
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};
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if (GNUNET_OK !=
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MAJ_parse_json (detail_j,
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spec_detail))
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{
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GNUNET_break_op (0);
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response_code = 0;
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break;
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}
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}
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if (0 == response_code)
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break;
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wdh->cb (wdh->cb_cls,
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response_code,
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json,
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&h_wire,
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&total_amount,
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num_details,
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details);
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json_decref (json);
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TALER_MINT_wire_deposits_cancel (wdh);
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return;
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}
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}
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break;
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case MHD_HTTP_BAD_REQUEST:
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/* This should never happen, either us or the mint is buggy
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(or API version conflict); just pass JSON reply to the application */
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break;
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case MHD_HTTP_UNAUTHORIZED:
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/* Nothing really to verify, mint says one of the signatures is
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invalid; as we checked them, this should never happen, we
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should pass the JSON reply to the application */
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break;
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case MHD_HTTP_NOT_FOUND:
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/* Mint does not know about transaction;
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we should pass the reply to the application */
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break;
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case MHD_HTTP_INTERNAL_SERVER_ERROR:
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/* Server had an internal issue; we should retry, but this API
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leaves this to the application */
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break;
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default:
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/* unexpected response code */
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GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
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"Unexpected response code %u\n",
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response_code);
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GNUNET_break (0);
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response_code = 0;
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break;
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}
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wdh->cb (wdh->cb_cls,
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response_code,
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json,
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NULL, NULL, 0, NULL);
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json_decref (json);
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TALER_MINT_wire_deposits_cancel (wdh);
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}
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/**
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* Query the mint about which transactions were combined
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* to create a wire transfer.
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*
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* @param mint mint to query
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* @param wtid raw wire transfer identifier to get information about
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* @param cb callback to call
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* @param cb_cls closure for @a cb
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* @return handle to cancel operation
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*/
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struct TALER_MINT_WireDepositsHandle *
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TALER_MINT_wire_deposits (struct TALER_MINT_Handle *mint,
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const struct TALER_WireTransferIdentifierRawP *wtid,
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TALER_MINT_WireDepositsCallback cb,
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void *cb_cls)
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{
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struct TALER_MINT_WireDepositsHandle *wdh;
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struct TALER_MINT_Context *ctx;
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json_t *wdh_obj;
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CURL *eh;
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if (GNUNET_YES !=
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MAH_handle_is_ready (mint))
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{
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GNUNET_break (0);
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return NULL;
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}
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wdh_obj = json_pack ("{s:o}",
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"wtid", TALER_json_from_data (wtid,
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sizeof (struct TALER_WireTransferIdentifierRawP)));
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wdh = GNUNET_new (struct TALER_MINT_WireDepositsHandle);
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wdh->mint = mint;
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wdh->cb = cb;
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wdh->cb_cls = cb_cls;
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wdh->url = MAH_path_to_url (mint, "/wire/deposits");
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eh = curl_easy_init ();
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GNUNET_assert (NULL != (wdh->json_enc =
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json_dumps (wdh_obj,
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JSON_COMPACT)));
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json_decref (wdh_obj);
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_URL,
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wdh->url));
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_POSTFIELDS,
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wdh->json_enc));
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_POSTFIELDSIZE,
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strlen (wdh->json_enc)));
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_WRITEFUNCTION,
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&MAC_download_cb));
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_WRITEDATA,
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&wdh->db));
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ctx = MAH_handle_to_context (mint);
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wdh->job = MAC_job_add (ctx,
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eh,
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GNUNET_YES,
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&handle_wire_deposits_finished,
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wdh);
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return wdh;
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}
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/**
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* Cancel wire deposits request. This function cannot be used on a request
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* handle if a response is already served for it.
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*
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* @param wdh the wire deposits request handle
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*/
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void
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TALER_MINT_wire_deposits_cancel (struct TALER_MINT_WireDepositsHandle *wdh)
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{
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if (NULL != wdh->job)
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{
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MAC_job_cancel (wdh->job);
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wdh->job = NULL;
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}
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GNUNET_free_non_null (wdh->db.buf);
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GNUNET_free (wdh->url);
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GNUNET_free (wdh->json_enc);
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GNUNET_free (wdh);
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}
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/* end of mint_api_wire_deposits.c */
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