[taler-anastasis] branch master updated: fix handler context usage'

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grothoff pushed a commit to branch master
in repository anastasis.

The following commit(s) were added to refs/heads/master by this push:
     new 9ea122b  fix handler context usage'
9ea122b is described below

commit 9ea122bc58898bed112a3925159f480e8a96a3a1
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Wed Oct 14 10:42:42 2020 +0200

    fix handler context usage'
---
 src/backend/anastasis-httpd.c               | 84 +++++++++--------------------
 src/backend/anastasis-httpd.h               |  9 +---
 src/backend/anastasis-httpd_config.c        | 12 ++---
 src/backend/anastasis-httpd_config.h        | 10 +---
 src/backend/anastasis-httpd_mhd.c           | 22 +-------
 src/backend/anastasis-httpd_mhd.h           | 14 +----
 src/backend/anastasis-httpd_policy.h        |  6 +--
 src/backend/anastasis-httpd_policy_upload.c | 20 +++----
 src/backend/anastasis-httpd_salt.c          | 11 ++--
 src/backend/anastasis-httpd_salt.h          | 11 ++--
 src/backend/anastasis-httpd_terms.c         | 11 +---
 src/backend/anastasis-httpd_terms.h         | 10 +---
 src/backend/anastasis-httpd_truth.h         |  6 +--
 src/backend/anastasis-httpd_truth_upload.c  | 29 +++++-----
 14 files changed, 71 insertions(+), 184 deletions(-)

diff --git a/src/backend/anastasis-httpd.c b/src/backend/anastasis-httpd.c
index 7e29ef3..252b893 100644
--- a/src/backend/anastasis-httpd.c
+++ b/src/backend/anastasis-httpd.c
@@ -181,7 +181,7 @@ run_daemon (void *cls)
  * the task processing MHD's activities to run immediately.
  */
 void
-AH_trigger_daemon ()
+AH_trigger_daemon (void)
 {
   if (NULL != mhd_task)
   {
@@ -200,7 +200,7 @@ AH_trigger_daemon ()
  * Kick GNUnet Curl scheduler to begin curl interactions.
  */
 void
-AH_trigger_curl ()
+AH_trigger_curl (void)
 {
   GNUNET_CURL_gnunet_scheduler_reschedule (&rc);
 }
@@ -269,6 +269,9 @@ url_handler (void *cls,
     { "/config", MHD_HTTP_METHOD_GET, "text/plain",
       NULL, 0,
       &AH_handler_config, MHD_HTTP_OK },
+    { "/salt", MHD_HTTP_METHOD_GET, "text/plain",
+      NULL, 0,
+      &AH_handler_salt, MHD_HTTP_OK },
     {NULL, NULL, NULL, NULL, 0, 0 }
   };
   static struct TMH_RequestHandler h404 = {
@@ -278,11 +281,12 @@ url_handler (void *cls,
   };
 
   struct TM_HandlerContext *hc = *con_cls;
-  struct GNUNET_AsyncScopeId aid;
   const char *correlation_id = NULL;
 
   if (NULL == hc)
   {
+    struct GNUNET_AsyncScopeId aid;
+
     GNUNET_async_scope_fresh (&aid);
     /* We only read the correlation ID on the first callback for every client 
*/
     correlation_id = MHD_lookup_connection_value (connection,
@@ -295,13 +299,12 @@ url_handler (void *cls,
                   "illegal incoming correlation ID\n");
       correlation_id = NULL;
     }
-  }
-  else
-  {
-    aid = hc->async_scope_id;
+    hc = GNUNET_new (struct TM_HandlerContext);
+    *con_cls = hc;
+    hc->async_scope_id = aid;
   }
 
-  GNUNET_SCHEDULER_begin_async_scope (&aid);
+  GNUNET_SCHEDULER_begin_async_scope (&hc->async_scope_id);
   if (NULL != correlation_id)
     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                 "Handling request for (%s) URL '%s', correlation_id=%s\n",
@@ -327,20 +330,11 @@ url_handler (void *cls,
     if (0 == strcmp (method,
                      MHD_HTTP_METHOD_POST))
     {
-      MHD_RESULT ret;
-      ret = AH_handler_policy_post (connection,
-                                    con_cls,
-                                    url,
-                                    upload_data,
-                                    upload_data_size);
-      hc = *con_cls;
-      if (NULL != hc)
-      {
-        /* Store the async context ID, so we can restore it if
-         * we get another callack for this request. */
-        hc->async_scope_id = aid;
-      }
-      return ret;
+      return AH_handler_policy_post (connection,
+                                     hc,
+                                     url + strlen ("/policy/"),
+                                     upload_data,
+                                     upload_data_size);
     }
   }
   if (0 == strncmp (url,
@@ -353,31 +347,18 @@ url_handler (void *cls,
     {
       return AH_handler_truth_get (connection,
                                    url,
-                                   con_cls);
+                                   hc);
     }
     if (0 == strcmp (method,
                      MHD_HTTP_METHOD_POST))
     {
       return AH_handler_truth_post (connection,
-                                    con_cls,
-                                    url,
+                                    hc,
+                                    url + strlen ("/truth/"),
                                     upload_data,
                                     upload_data_size);
     }
   }
-  if (0 == strncmp (url,
-                    "/salt",
-                    strlen ("/salt")))
-  {
-    // return handle_salt (...);
-    if (0 == strcmp (method,
-                     MHD_HTTP_METHOD_GET))
-    {
-      return AH_handler_salt (connection,
-                              url,
-                              con_cls);
-    }
-  }
   for (unsigned int i = 0; NULL != handlers[i].url; i++)
   {
     struct TMH_RequestHandler *rh = &handlers[i];
@@ -394,30 +375,14 @@ url_handler (void *cls,
            (0 == strcasecmp (method,
                              rh->method)) )
       {
-        MHD_RESULT ret;
-
-        ret = rh->handler (rh,
-                           connection,
-                           con_cls,
-                           upload_data,
-                           upload_data_size);
-        hc = *con_cls;
-        if (NULL != hc)
-        {
-          hc->rh = rh;
-          /* Store the async context ID, so we can restore it if
-          * we get another callack for this request. */
-          hc->async_scope_id = aid;
-        }
-        return ret;
+        return rh->handler (rh,
+                            connection);
       }
     }
   }
+  // FIXME: HTTP 405? METHOD_NOT_ALLOWED
   return TMH_MHD_handler_static_response (&h404,
-                                          connection,
-                                          con_cls,
-                                          upload_data,
-                                          upload_data_size);
+                                          connection);
 }
 
 
@@ -490,7 +455,8 @@ handle_mhd_completion_callback (void *cls,
   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
               "Finished handling request with status %d\n",
               (int) toe);
-  hc->cc (hc);
+  if (NULL != hc->cc)
+    hc->cc (hc);
   *con_cls = NULL;
 }
 
diff --git a/src/backend/anastasis-httpd.h b/src/backend/anastasis-httpd.h
index 188a824..b0b6fba 100644
--- a/src/backend/anastasis-httpd.h
+++ b/src/backend/anastasis-httpd.h
@@ -64,18 +64,11 @@ struct TMH_RequestHandler
    * Function to call to handle the request.
    *
    * @param rh this struct
-   * @param mime_type the @e mime_type for the reply (hint, can be NULL)
    * @param connection the MHD connection to handle
-   * @param[in,out] connection_cls the connection's closure (can be updated)
-   * @param upload_data upload data
-   * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
    * @return MHD result code
    */
   MHD_RESULT (*handler)(struct TMH_RequestHandler *rh,
-                        struct MHD_Connection *connection,
-                        void **connection_cls,
-                        const char *upload_data,
-                        size_t *upload_data_size);
+                        struct MHD_Connection *connection);
 
   /**
    * Default response code.
diff --git a/src/backend/anastasis-httpd_config.c 
b/src/backend/anastasis-httpd_config.c
index dae879a..97b184c 100644
--- a/src/backend/anastasis-httpd_config.c
+++ b/src/backend/anastasis-httpd_config.c
@@ -30,21 +30,15 @@
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
- * @param mi merchant backend instance, never NULL
  * @return MHD result code
  */
 MHD_RESULT
 AH_handler_config (struct TMH_RequestHandler *rh,
-                   struct MHD_Connection *connection,
-                   void **connection_cls,
-                   const char *upload_data,
-                   size_t *upload_data_size)
+                   struct MHD_Connection *connection)
 {
   json_t *methods = json_object ();
   json_t *method_arr = json_array ();
+
   if (! method_arr)
     return MHD_HTTP_BAD_GATEWAY;
 
@@ -136,4 +130,4 @@ AH_handler_config (struct TMH_RequestHandler *rh,
 }
 
 
-/* end of anastasis-httpd_config.c */
\ No newline at end of file
+/* end of anastasis-httpd_config.c */
diff --git a/src/backend/anastasis-httpd_config.h 
b/src/backend/anastasis-httpd_config.h
index f096369..3acf5a4 100644
--- a/src/backend/anastasis-httpd_config.h
+++ b/src/backend/anastasis-httpd_config.h
@@ -30,18 +30,12 @@
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
 MHD_RESULT
 AH_handler_config (struct TMH_RequestHandler *rh,
-                   struct MHD_Connection *connection,
-                   void **connection_cls,
-                   const char *upload_data,
-                   size_t *upload_data_size);
+                   struct MHD_Connection *connection);
 
 #endif
 
-/* end of anastasis-httpd_config.h */
\ No newline at end of file
+/* end of anastasis-httpd_config.h */
diff --git a/src/backend/anastasis-httpd_mhd.c 
b/src/backend/anastasis-httpd_mhd.c
index 0913b5e..4712210 100644
--- a/src/backend/anastasis-httpd_mhd.c
+++ b/src/backend/anastasis-httpd_mhd.c
@@ -33,21 +33,12 @@
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
 MHD_RESULT
 TMH_MHD_handler_static_response (struct TMH_RequestHandler *rh,
-                                 struct MHD_Connection *connection,
-                                 void **connection_cls,
-                                 const char *upload_data,
-                                 size_t *upload_data_size)
+                                 struct MHD_Connection *connection)
 {
-  (void) connection_cls;
-  (void) upload_data;
-  (void) upload_data_size;
   if (0 == rh->data_size)
     rh->data_size = strlen ((const char *) rh->data);
   return TALER_MHD_reply_static (connection,
@@ -64,22 +55,13 @@ TMH_MHD_handler_static_response (struct TMH_RequestHandler 
*rh,
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
 MHD_RESULT
 TMH_MHD_handler_agpl_redirect (struct TMH_RequestHandler *rh,
-                               struct MHD_Connection *connection,
-                               void **connection_cls,
-                               const char *upload_data,
-                               size_t *upload_data_size)
+                               struct MHD_Connection *connection)
 {
   (void) rh;
-  (void) connection_cls;
-  (void) upload_data;
-  (void) upload_data_size;
   return TALER_MHD_reply_agpl (connection,
                                "http://www.git.taler.net/anastasis.git";);
 }
diff --git a/src/backend/anastasis-httpd_mhd.h 
b/src/backend/anastasis-httpd_mhd.h
index 61986cf..a9b8b83 100644
--- a/src/backend/anastasis-httpd_mhd.h
+++ b/src/backend/anastasis-httpd_mhd.h
@@ -42,10 +42,7 @@
  */
 MHD_RESULT
 TMH_MHD_handler_static_response (struct TMH_RequestHandler *rh,
-                                 struct MHD_Connection *connection,
-                                 void **connection_cls,
-                                 const char *upload_data,
-                                 size_t *upload_data_size);
+                                 struct MHD_Connection *connection);
 
 
 /**
@@ -54,18 +51,11 @@ TMH_MHD_handler_static_response (struct TMH_RequestHandler 
*rh,
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
- * @param mi merchant backend instance, never NULL
  * @return MHD result code
  */
 MHD_RESULT
 TMH_MHD_handler_agpl_redirect (struct TMH_RequestHandler *rh,
-                               struct MHD_Connection *connection,
-                               void **connection_cls,
-                               const char *upload_data,
-                               size_t *upload_data_size);
+                               struct MHD_Connection *connection);
 
 
 #endif
diff --git a/src/backend/anastasis-httpd_policy.h 
b/src/backend/anastasis-httpd_policy.h
index 1373cf0..ff2b8c9 100644
--- a/src/backend/anastasis-httpd_policy.h
+++ b/src/backend/anastasis-httpd_policy.h
@@ -44,15 +44,15 @@ AH_policy_get (struct MHD_Connection *connection,
 /**
  * @param connection the MHD connection to handle
  * @param con_cls the connection's closure
- * @param url handles a URL of the format "/policy/$ACCOUNT_PUB"
+ * @param account name of the account of the format "$ACCOUNT_PUB"
  * @param upload_data upload data
  * @param upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
 MHD_RESULT
 AH_handler_policy_post (struct MHD_Connection *connection,
-                        void **con_cls,
-                        const char *url,
+                        struct TM_HandlerContext *hc,
+                        const char *account,
                         const char *upload_data,
                         size_t *upload_data_size);
 
diff --git a/src/backend/anastasis-httpd_policy_upload.c 
b/src/backend/anastasis-httpd_policy_upload.c
index 2cd5b18..3c439b9 100644
--- a/src/backend/anastasis-httpd_policy_upload.c
+++ b/src/backend/anastasis-httpd_policy_upload.c
@@ -206,7 +206,7 @@ AH_resume_all_bc ()
 static void
 cleanup_ctx (struct TM_HandlerContext *hc)
 {
-  struct PolicyUploadContext *puc = (struct PolicyUploadContext *) hc;
+  struct PolicyUploadContext *puc = hc->ctx;
 
   if (NULL != puc->po)
     TALER_MERCHANT_orders_post_cancel (puc->po);
@@ -654,19 +654,19 @@ handle_database_error (struct PolicyUploadContext *puc,
 /**
  * @param connection the MHD connection to handle
  * @param con_cls the connection's closure
- * @param url handles a URL of the format "/policy/$ACCOUNT_PUB"
+ * @param account name of the account of the format "$ACCOUNT_PUB"
  * @param recovery_data upload data
  * @param recovery_data_size number of bytes (left) in @a recovery_data
  * @return MHD result code
  */
 MHD_RESULT
 AH_handler_policy_post (struct MHD_Connection *connection,
-                        void **con_cls,
-                        const char *url,
+                        struct TM_HandlerContext *hc,
+                        const char *account,
                         const char *recovery_data,
                         size_t *recovery_data_size)
 {
-  struct PolicyUploadContext *puc;
+  struct PolicyUploadContext *puc = hc->ctx;
   struct ANASTASIS_CRYPTO_AccountPublicKeyP accountPubP;
   struct TALER_Amount zero_amount;
   bool zero_cost = false;
@@ -675,11 +675,11 @@ AH_handler_policy_post (struct MHD_Connection *connection,
   if (0 == TALER_amount_cmp (&AH_annual_fee, &zero_amount))
     zero_cost = true;
 
-  puc = *con_cls;
   if (NULL == puc)
   {
     /* first call, setup internals */
     puc = GNUNET_new (struct PolicyUploadContext);
+    hc->ctx = puc;
     puc->hc.cc = &cleanup_ctx;
     puc->con = connection;
 
@@ -687,13 +687,7 @@ AH_handler_policy_post (struct MHD_Connection *connection,
                 "At %s:%d handler is policy_post\n", __FILE__, __LINE__);
 
     /* extract publickey from url */
-    GNUNET_assert (0 == strncmp (url,
-                                 "/policy/",
-                                 strlen ("/policy/")));
     {
-      const char *account;
-
-      account = &url[strlen ("/policy/")];
       if (GNUNET_OK !=
           GNUNET_CRYPTO_eddsa_public_key_from_string (account,
                                                       strlen (account),
@@ -711,8 +705,6 @@ AH_handler_policy_post (struct MHD_Connection *connection,
                 TALER_B2S (&puc->account),
                 (unsigned long long) sizeof (struct
                                              
ANASTASIS_CRYPTO_AccountPublicKeyP));
-    *con_cls = puc;
-
     /* now setup 'puc' */
     {
       const char *lens;
diff --git a/src/backend/anastasis-httpd_salt.c 
b/src/backend/anastasis-httpd_salt.c
index b2c76fb..4be8620 100644
--- a/src/backend/anastasis-httpd_salt.c
+++ b/src/backend/anastasis-httpd_salt.c
@@ -29,14 +29,11 @@
 
 /**
  * @param connection the MHD connection to handle
- * @param url handles a URL of the format "/salt"
- * @param con_cls
  * @return MHD result code
  */
-int
-AH_handler_salt (struct MHD_Connection *connection,
-                 const char *url,
-                 void **con_cls)
+MHD_RESULT
+AH_handler_salt (struct TMH_RequestHandler *rh,
+                 struct MHD_Connection *connection)
 {
   struct ANASTASIS_CRYPTO_PowSalt salt;
 
@@ -54,4 +51,4 @@ AH_handler_salt (struct MHD_Connection *connection,
                                     "{s:o}",
                                     "server_salt",
                                     GNUNET_JSON_from_data_auto (&salt));
-}
\ No newline at end of file
+}
diff --git a/src/backend/anastasis-httpd_salt.h 
b/src/backend/anastasis-httpd_salt.h
index 1ea3da4..6c46bd8 100644
--- a/src/backend/anastasis-httpd_salt.h
+++ b/src/backend/anastasis-httpd_salt.h
@@ -26,13 +26,10 @@
 
 /**
  * @param connection the MHD connection to handle
- * @param url handles a URL of the format "/salt"
- * @param con_cls
  * @return MHD result code
  */
-int
-AH_handler_salt (struct MHD_Connection *connection,
-                 const char *url,
-                 void **con_cls);
+MHD_RESULT
+AH_handler_salt (struct TMH_RequestHandler *rh,
+                 struct MHD_Connection *connection);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/backend/anastasis-httpd_terms.c 
b/src/backend/anastasis-httpd_terms.c
index c908975..7e79a94 100644
--- a/src/backend/anastasis-httpd_terms.c
+++ b/src/backend/anastasis-httpd_terms.c
@@ -29,18 +29,11 @@
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
- * @param mi merchant backend instance, never NULL
  * @return MHD result code
  */
 MHD_RESULT
 AH_handler_terms (struct TMH_RequestHandler *rh,
-                  struct MHD_Connection *connection,
-                  void **connection_cls,
-                  const char *upload_data,
-                  size_t *upload_data_size)
+                  struct MHD_Connection *connection)
 {
   // FIXME AGB
   return TALER_MHD_reply_json_pack (connection,
@@ -55,4 +48,4 @@ AH_handler_terms (struct TMH_RequestHandler *rh,
 }
 
 
-/* end of anastasis-httpd_terms.c */
\ No newline at end of file
+/* end of anastasis-httpd_terms.c */
diff --git a/src/backend/anastasis-httpd_terms.h 
b/src/backend/anastasis-httpd_terms.h
index 8d918d9..b477ecf 100644
--- a/src/backend/anastasis-httpd_terms.h
+++ b/src/backend/anastasis-httpd_terms.h
@@ -30,18 +30,12 @@
  *
  * @param rh context of the handler
  * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
  * @return MHD result code
  */
 MHD_RESULT
 AH_handler_terms (struct TMH_RequestHandler *rh,
-                  struct MHD_Connection *connection,
-                  void **connection_cls,
-                  const char *upload_data,
-                  size_t *upload_data_size);
+                  struct MHD_Connection *connection);
 
 #endif
 
-/* end of anastasis-httpd_terms.h */
\ No newline at end of file
+/* end of anastasis-httpd_terms.h */
diff --git a/src/backend/anastasis-httpd_truth.h 
b/src/backend/anastasis-httpd_truth.h
index efa6b1b..c34c268 100644
--- a/src/backend/anastasis-httpd_truth.h
+++ b/src/backend/anastasis-httpd_truth.h
@@ -42,15 +42,15 @@ AH_handler_truth_get (struct MHD_Connection *connection,
 /**
  * @param connection the MHD connection to handle
  * @param con_cls the connection's closure
- * @param url handles a URL of the format "/truth/$TRUTH_PUBLIC_KEY
+ * @param pub_key_str base32 encoded truth public key
  * @param truth_data truth data
  * @param truth_data_size number of bytes (left) in @a truth_data
  * @return MHD result code
  */
 int
 AH_handler_truth_post (struct MHD_Connection *connection,
-                       void **con_cls,
-                       const char *url,
+                       struct TM_HandlerContext *hc,
+                       const char *pub_key_str,
                        const char *truth_data,
                        size_t *truth_data_size);
 
diff --git a/src/backend/anastasis-httpd_truth_upload.c 
b/src/backend/anastasis-httpd_truth_upload.c
index 41f5366..cfc6793 100644
--- a/src/backend/anastasis-httpd_truth_upload.c
+++ b/src/backend/anastasis-httpd_truth_upload.c
@@ -57,18 +57,25 @@ verify_and_execute_truth (struct MHD_Connection *connection,
 }
 
 
+static void
+cleanup_parse_post_json (struct TM_HandlerContext *hc)
+{
+  TALER_MHD_parse_post_cleanup_callback (hc->ctx);
+}
+
+
 /**
  * @param connection the MHD connection to handle
  * @param con_cls the connection's closure
- * @param url handles a URL of the format "/truth/$TRUTH_PUBLIC_KEY
+ * @param pub_key_str base32 encoded truth public key
  * @param truth_data truth data
  * @param truth_data_size number of bytes (left) in @a truth_data
  * @return MHD result code
  */
 int
 AH_handler_truth_post (struct MHD_Connection *connection,
-                       void **con_cls,
-                       const char *url,
+                       struct TM_HandlerContext *hc,
+                       const char *pub_key_str,
                        const char *truth_data,
                        size_t *truth_data_size)
 {
@@ -79,21 +86,12 @@ AH_handler_truth_post (struct MHD_Connection *connection,
   struct ANASTASIS_DB_Truth truth;
 
   /* extract public key from url */
-  GNUNET_assert (0 == strncmp (url,
-                               "/truth/",
-                               strlen ("/truth/")));
   {
-    const char *pub_key_str;
-
-    pub_key_str = &url[strlen ("/truth/")];
-    GNUNET_assert (NULL != pub_key_str);
-
     GNUNET_STRINGS_string_to_data (pub_key_str,
                                    strlen (pub_key_str),
                                    &truth_public_key,
                                    sizeof(struct
                                           ANASTASIS_CRYPTO_TruthPublicKeyP));
-
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                 "public key from Url: %s\n",
                 pub_key_str);
@@ -108,12 +106,9 @@ AH_handler_truth_post (struct MHD_Connection *connection,
       GNUNET_JSON_spec_end ()
     };
 
-    (void) con_cls;
-    (void) truth_data;
-    (void) truth_data_size;
-
+    hc->cc = &cleanup_parse_post_json;
     res = TALER_MHD_parse_post_json (connection,
-                                     con_cls,
+                                     &hc->ctx,
                                      truth_data,
                                      truth_data_size,
                                      &json);

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