246 lines
7.0 KiB
C
246 lines
7.0 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2015, 2016, 2017 Taler Systems SA
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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, see
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<http://www.gnu.org/licenses/>
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*/
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/**
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* @file bank-lib/bank_api_reject.c
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* @brief Implementation of the /reject request of the bank'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 "bank_api_common.h"
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#include <microhttpd.h> /* just for HTTP status codes */
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#include "taler_signatures.h"
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/**
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* @brief A /reject Handle
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*/
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struct TALER_BANK_RejectHandle
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{
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/**
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* The url for this request.
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*/
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char *request_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 GNUNET_CURL_Job *job;
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/**
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* HTTP authentication-related headers for the request.
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*/
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struct curl_slist *authh;
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/**
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* Function to call with the result.
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*/
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TALER_BANK_RejectResultCallback 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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/**
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* Function called when we're done processing the
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* HTTP /reject request.
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*
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* @param cls the `struct TALER_BANK_RejectHandle`
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* @param response_code HTTP response code, 0 on error
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* @param json parsed JSON result, NULL on error
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*/
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static void
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handle_reject_finished (void *cls,
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long response_code,
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const json_t *json)
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{
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struct TALER_BANK_RejectHandle *rh = cls;
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enum TALER_ErrorCode ec;
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rh->job = NULL;
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switch (response_code)
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{
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case 0:
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ec = TALER_EC_INVALID_RESPONSE;
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break;
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case MHD_HTTP_OK:
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GNUNET_break_op (0);
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response_code = 0;
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ec = TALER_EC_INVALID_RESPONSE;
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break;
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case MHD_HTTP_NO_CONTENT:
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ec = TALER_EC_NONE;
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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 bank is buggy
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(or API version conflict); just pass JSON reply to the application */
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ec = TALER_BANK_parse_ec_ (json);
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break;
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case MHD_HTTP_FORBIDDEN:
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/* Access denied */
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ec = TALER_BANK_parse_ec_ (json);
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break;
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case MHD_HTTP_UNAUTHORIZED:
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/* Nothing really to verify, bank 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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ec = TALER_BANK_parse_ec_ (json);
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break;
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case MHD_HTTP_NOT_FOUND:
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/* Nothing really to verify, this should never
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happen, we should pass the JSON reply to the application */
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ec = TALER_BANK_parse_ec_ (json);
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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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ec = TALER_BANK_parse_ec_ (json);
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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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(unsigned int) response_code);
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GNUNET_break (0);
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ec = TALER_BANK_parse_ec_ (json);
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response_code = 0;
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break;
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}
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rh->cb (rh->cb_cls,
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response_code,
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ec);
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TALER_BANK_reject_cancel (rh);
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}
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/**
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* Request rejection of a wire transfer, marking it as cancelled and voiding
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* its effects.
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*
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* @param ctx curl context for the event loop
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* @param bank_base_url URL of the bank (used to execute this request)
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* @param auth authentication data to use
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* @param account_number which account number should we query
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* @param rowid transfer to reject
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* @param rcb the callback to call with the operation result
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* @param rcb_cls closure for @a rcb
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* @return NULL
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* if the inputs are invalid.
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* In this case, the callback is not called.
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*/
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struct TALER_BANK_RejectHandle *
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TALER_BANK_reject (struct GNUNET_CURL_Context *ctx,
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const char *bank_base_url,
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const struct TALER_BANK_AuthenticationData *auth,
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uint64_t account_number,
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uint64_t rowid,
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TALER_BANK_RejectResultCallback rcb,
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void *rcb_cls)
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{
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struct TALER_BANK_RejectHandle *rh;
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json_t *reject_obj;
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CURL *eh;
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reject_obj = json_pack ("{s:{s:s}, s:I, s:I}",
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"auth", "type", "basic",
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"row_id", (json_int_t) rowid,
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"account_number", (json_int_t) account_number);
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if (NULL == reject_obj)
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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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rh = GNUNET_new (struct TALER_BANK_RejectHandle);
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rh->cb = rcb;
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rh->cb_cls = rcb_cls;
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rh->request_url = TALER_BANK_path_to_url_ (bank_base_url,
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"/reject");
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rh->authh = TALER_BANK_make_auth_header_ (auth);
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/* Append content type header here, can't do it in GNUNET_CURL_job_add
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as that would override the CURLOPT_HTTPHEADER instead of appending. */
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{
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struct curl_slist *ext;
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ext = curl_slist_append (rh->authh,
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"Content-Type: application/json");
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if (NULL == ext)
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GNUNET_break (0);
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else
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rh->authh = ext;
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}
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eh = curl_easy_init ();
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GNUNET_assert (NULL != (rh->json_enc =
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json_dumps (reject_obj,
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JSON_COMPACT)));
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json_decref (reject_obj);
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GNUNET_assert (CURLE_OK ==
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curl_easy_setopt (eh,
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CURLOPT_HTTPHEADER,
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rh->authh));
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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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rh->request_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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rh->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 (rh->json_enc)));
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rh->job = GNUNET_CURL_job_add (ctx,
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eh,
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GNUNET_NO,
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&handle_reject_finished,
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rh);
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return rh;
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}
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/**
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* Cancel an reject request. This function cannot be used on a request
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* handle if the response was is already served for it.
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*
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* @param rh the reject request handle
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*/
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void
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TALER_BANK_reject_cancel (struct TALER_BANK_RejectHandle *rh)
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{
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if (NULL != rh->job)
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{
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GNUNET_CURL_job_cancel (rh->job);
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rh->job = NULL;
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}
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curl_slist_free_all (rh->authh);
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GNUNET_free (rh->request_url);
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GNUNET_free (rh->json_enc);
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GNUNET_free (rh);
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}
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/* end of bank_api_reject.c */
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