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 taler-merchant-httpd_get-products-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.h"
      23              : #include "taler-merchant-httpd_helper.h"
      24              : #include <taler/taler_error_codes.h>
      25              : 
      26              : 
      27              : MHD_RESULT
      28            8 : TMH_get_products_image (const struct TMH_RequestHandler *rh,
      29              :                         struct MHD_Connection *connection,
      30              :                         struct TMH_HandlerContext *hc)
      31              : {
      32            8 :   struct TMH_MerchantInstance *mi = hc->instance;
      33            8 :   const char *image_hash = hc->infix;
      34            8 :   char *image = NULL;
      35              :   enum GNUNET_DB_QueryStatus qs;
      36              :   (void) rh;
      37              : 
      38              :   {
      39              :     /* Just simple check if the string is what we really expect */
      40            8 :     size_t ih_len = strlen (image_hash);
      41              : 
      42            8 :     if ( (sizeof (struct GNUNET_ShortHashCode) * 2) != ih_len)
      43            4 :       return TALER_MHD_reply_with_error (connection,
      44              :                                          MHD_HTTP_BAD_REQUEST,
      45              :                                          TALER_EC_GENERIC_PARAMETER_MALFORMED,
      46              :                                          "image_hash");
      47              : 
      48          260 :     for (size_t i = 0; i < ih_len; i++)
      49          256 :       if (! isxdigit ((unsigned char) image_hash[i]))
      50            0 :         return TALER_MHD_reply_with_error (connection,
      51              :                                            MHD_HTTP_BAD_REQUEST,
      52              :                                            TALER_EC_GENERIC_PARAMETER_MALFORMED,
      53              :                                            "image_hash");
      54              :   }
      55              : 
      56            4 :   qs = TMH_db->lookup_product_image_by_hash (TMH_db->cls,
      57            4 :                                              mi->settings.id,
      58              :                                              image_hash,
      59              :                                              &image);
      60            4 :   if (0 > qs)
      61              :   {
      62            0 :     GNUNET_break (0);
      63            0 :     return TALER_MHD_reply_with_error (connection,
      64              :                                        MHD_HTTP_INTERNAL_SERVER_ERROR,
      65              :                                        TALER_EC_GENERIC_DB_FETCH_FAILED,
      66              :                                        "lookup_product_image_by_hash");
      67              :   }
      68            4 :   if ( (0 == qs) ||
      69            2 :        (NULL == image) )
      70              :   {
      71            2 :     return TALER_MHD_reply_with_error (connection,
      72              :                                        MHD_HTTP_NOT_FOUND,
      73              :                                        TALER_EC_MERCHANT_GENERIC_PRODUCT_UNKNOWN,
      74              :                                        image_hash);
      75              :   }
      76              : 
      77              :   {
      78              :     MHD_RESULT ret;
      79              : 
      80            2 :     ret = TALER_MHD_REPLY_JSON_PACK (connection,
      81              :                                      MHD_HTTP_OK,
      82              :                                      GNUNET_JSON_pack_string ("image",
      83              :                                                               image));
      84            2 :     GNUNET_free (image);
      85            2 :     return ret;
      86              :   }
      87              : }