Line data    Source code

       1              : /*
       2              :   This file is part of TALER
       3              :   Copyright (C) 2025 Taler Systems SA
       4              : 
       5              :   TALER is free software; you can redistribute it and/or modify it under the
       6              :   terms of the GNU Affero General Public License as published by the Free Software
       7              :   Foundation; either version 3, or (at your option) any later version.
       8              : 
       9              :   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
      10              :   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
      11              :   A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
      12              : 
      13              :   You should have received a copy of the GNU Affero General Public License along with
      14              :   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
      15              : */
      16              : /**
      17              :  * @file src/backend/taler-merchant-httpd_get-products-IMAGE_HASH-image.c
      18              :  * @brief implement GET /products/$HASH/image
      19              :  * @author Bohdan Potuzhnyi
      20              :  */
      21              : #include "platform.h"
      22              : #include "taler-merchant-httpd_get-products-IMAGE_HASH-image.h"
      23              : #include "taler-merchant-httpd_helper.h"
      24              : #include <taler/taler_error_codes.h>
      25              : #include "merchant-database/get_product_image_by_hash.h"
      26              : 
      27              : 
      28              : enum MHD_Result
      29            8 : TMH_get_products_image (const struct TMH_RequestHandler *rh,
      30              :                         struct MHD_Connection *connection,
      31              :                         struct TMH_HandlerContext *hc)
      32              : {
      33            8 :   struct TMH_MerchantInstance *mi = hc->instance;
      34            8 :   const char *image_hash = hc->infix;
      35            8 :   char *image = NULL;
      36              :   enum GNUNET_DB_QueryStatus qs;
      37              :   (void) rh;
      38              : 
      39              :   {
      40              :     /* Just simple check if the string is what we really expect */
      41            8 :     size_t ih_len = strlen (image_hash);
      42              : 
      43            8 :     if ( (sizeof (struct GNUNET_ShortHashCode) * 2) != ih_len)
      44            4 :       return TALER_MHD_reply_with_error (connection,
      45              :                                          MHD_HTTP_BAD_REQUEST,
      46              :                                          TALER_EC_GENERIC_PARAMETER_MALFORMED,
      47              :                                          "image_hash");
      48              : 
      49          260 :     for (size_t i = 0; i < ih_len; i++)
      50          256 :       if (! isxdigit ((unsigned char) image_hash[i]))
      51            0 :         return TALER_MHD_reply_with_error (connection,
      52              :                                            MHD_HTTP_BAD_REQUEST,
      53              :                                            TALER_EC_GENERIC_PARAMETER_MALFORMED,
      54              :                                            "image_hash");
      55              :   }
      56              : 
      57            4 :   qs = TALER_MERCHANTDB_get_product_image_by_hash (TMH_db,
      58            4 :                                                    mi->settings.id,
      59              :                                                    image_hash,
      60              :                                                    &image);
      61            4 :   if (0 > qs)
      62              :   {
      63            0 :     GNUNET_break (0);
      64            0 :     return TALER_MHD_reply_with_error (connection,
      65              :                                        MHD_HTTP_INTERNAL_SERVER_ERROR,
      66              :                                        TALER_EC_GENERIC_DB_FETCH_FAILED,
      67              :                                        "get_product_image_by_hash");
      68              :   }
      69            4 :   if ( (0 == qs) ||
      70            2 :        (NULL == image) )
      71              :   {
      72            2 :     return TALER_MHD_reply_with_error (connection,
      73              :                                        MHD_HTTP_NOT_FOUND,
      74              :                                        TALER_EC_MERCHANT_GENERIC_PRODUCT_UNKNOWN,
      75              :                                        image_hash);
      76              :   }
      77              : 
      78              :   {
      79              :     enum MHD_Result ret;
      80              : 
      81            2 :     ret = TALER_MHD_REPLY_JSON_PACK (connection,
      82              :                                      MHD_HTTP_OK,
      83              :                                      GNUNET_JSON_pack_string ("image",
      84              :                                                               image));
      85            2 :     GNUNET_free (image);
      86            2 :     return ret;
      87              :   }
      88              : }