exchange

Base system with REST service to issue digital coins, run by the payment service provider
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taler-auditor-httpd_mhd.c (4106B)

      1 /*
      2   This file is part of TALER
      3   Copyright (C) 2014-2020 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 /**
     18  * @file taler-auditor-httpd_mhd.c
     19  * @brief helpers for MHD interaction; these are TALER_MHD_handler_ functions
     20  *        that generate simple MHD replies that do not require any real operations
     21  *        to be performed (error handling, static pages, etc.)
     22  * @author Florian Dold
     23  * @author Benedikt Mueller
     24  * @author Christian Grothoff
     25  */
     26 #include <gnunet/gnunet_util_lib.h>
     27 #include <jansson.h>
     28 #include <microhttpd.h>
     29 #include <pthread.h>
     30 #include "taler/taler_mhd_lib.h"
     31 #include "taler-auditor-httpd.h"
     32 #include "taler-auditor-httpd_mhd.h"
     33 
     34 
     35 /**
     36  * Check recursively that integers in @a value are valid SafeUint64 values.
     37  *
     38  * @param value JSON value to inspect
     39  * @return true if all integers are safe
     40  */
     41 static bool
     42 json_integers_are_safe (const json_t *value)
     43 {
     44   if (json_is_integer (value))
     45   {
     46     json_int_t number = json_integer_value (value);
     47 
     48     return (number >= 0) &&
     49            ((uint64_t) number <= TAH_SAFE_UINT64_MAX);
     50   }
     51   if (json_is_array (value))
     52   {
     53     size_t index;
     54     json_t *child;
     55 
     56     json_array_foreach ((json_t *) value, index, child)
     57       if (! json_integers_are_safe (child))
     58         return false;
     59   }
     60   if (json_is_object (value))
     61   {
     62     const char *key;
     63     json_t *child;
     64 
     65     json_object_foreach ((json_t *) value, key, child)
     66       if (! json_integers_are_safe (child))
     67         return false;
     68   }
     69   return true;
     70 }
     71 
     72 
     73 enum MHD_Result
     74 TAH_reply_json_records (struct MHD_Connection *connection,
     75                         json_t *records)
     76 {
     77   if (! json_integers_are_safe (records))
     78   {
     79     GNUNET_break (0);
     80     json_decref (records);
     81     return TALER_MHD_reply_with_error (
     82       connection,
     83       MHD_HTTP_INTERNAL_SERVER_ERROR,
     84       TALER_EC_GENERIC_INTERNAL_INVARIANT_FAILURE,
     85       "monitoring response contains an integer outside SafeUint64");
     86   }
     87   return TALER_MHD_REPLY_JSON_PACK (
     88     connection,
     89     MHD_HTTP_OK,
     90     GNUNET_JSON_pack_array_steal ("records",
     91                                   records));
     92 }
     93 
     94 
     95 enum MHD_Result
     96 TAH_MHD_handler_static_response (struct TAH_RequestHandler *rh,
     97                                  struct MHD_Connection *connection,
     98                                  void **connection_cls,
     99                                  const char *upload_data,
    100                                  size_t *upload_data_size,
    101                                  const char *const args[])
    102 {
    103   size_t dlen;
    104 
    105   (void) connection_cls;
    106   (void) upload_data;
    107   (void) upload_data_size;
    108   dlen = (0 == rh->data_size)
    109          ? strlen ((const char *) rh->data)
    110          : rh->data_size;
    111   return TALER_MHD_reply_static (connection,
    112                                  rh->response_code,
    113                                  rh->mime_type,
    114                                  rh->data,
    115                                  dlen);
    116 }
    117 
    118 
    119 enum MHD_Result
    120 TAH_MHD_handler_agpl_redirect (struct TAH_RequestHandler *rh,
    121                                struct MHD_Connection *connection,
    122                                void **connection_cls,
    123                                const char *upload_data,
    124                                size_t *upload_data_size,
    125                                const char *const args[])
    126 {
    127   (void) rh;
    128   (void) connection_cls;
    129   (void) upload_data;
    130   (void) upload_data_size;
    131   return TALER_MHD_reply_agpl (connection,
    132                                "http://www.git.taler.net/?p=exchange.git");
    133 }
    134 
    135 
    136 /* end of taler-auditor-httpd_mhd.c */