1 files changed, 62 insertions, 67 deletions

diff --git a/src/lib/merchant_api_get_webhooks.c b/src/lib/merchant_api_get_webhooks.c
index f5ba6f41..e702baac 100644
--- a/src/lib/merchant_api_get_webhooks.c
+++ b/src/lib/merchant_api_get_webhooks.c
@@ -32,6 +32,11 @@
 
 
 /**
+ * Maximum number of webhooks we return.
+ */
+#define MAX_WEBHOOKS 1024
+
+/**
  * Handle for a GET /webhooks operation.
  */
 struct TALER_MERCHANT_WebhooksGetHandle
@@ -68,53 +73,52 @@ struct TALER_MERCHANT_WebhooksGetHandle
  * Parse webhook information from @a ia.
  *
  * @param ia JSON array (or NULL!) with webhook data
+ * @param[in] wgr partially filled webhook response
  * @param wgh operation handle
  * @return #GNUNET_OK on success
  */
-static int
+static enum GNUNET_GenericReturnValue
 parse_webhooks (const json_t *ia,
+                struct TALER_MERCHANT_WebhooksGetResponse *wgr,
                 struct TALER_MERCHANT_WebhooksGetHandle *wgh)
 {
-  unsigned int ies_len = json_array_size (ia);
-  struct TALER_MERCHANT_WebhookEntry ies[ies_len];
-  size_t index;
-  json_t *value;
-  int ret;
-
-  ret = GNUNET_OK;
-  json_array_foreach (ia, index, value) {
-    struct TALER_MERCHANT_WebhookEntry *ie = &ies[index];
-    struct GNUNET_JSON_Specification spec[] = {
-      GNUNET_JSON_spec_string ("webhook_id",
-                               &ie->webhook_id),
-      GNUNET_JSON_spec_end ()
-    };
-
-    if (GNUNET_OK !=
-        GNUNET_JSON_parse (value,
-                           spec,
-                           NULL, NULL))
-    {
-      GNUNET_break_op (0);
-      ret = GNUNET_SYSERR;
-      continue;
-    }
-    if (GNUNET_SYSERR == ret)
-      break;
+  unsigned int whook_len = (unsigned int) json_array_size (ia);
+
+  if ( (json_array_size (ia) != (size_t)  whook_len) ||
+       (whook_len > MAX_WEBHOOKS) )
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
   }
-  if (GNUNET_OK == ret)
   {
-    struct TALER_MERCHANT_HttpResponse hr = {
-      .http_status = MHD_HTTP_OK
-    };
+    struct TALER_MERCHANT_WebhookEntry whook[GNUNET_NZL (whook_len)];
+    size_t index;
+    json_t *value;
+
+    json_array_foreach (ia, index, value) {
+      struct TALER_MERCHANT_WebhookEntry *ie = &whook[index];
+      struct GNUNET_JSON_Specification spec[] = {
+        GNUNET_JSON_spec_string ("webhook_id",
+                                 &ie->webhook_id),
+        GNUNET_JSON_spec_end ()
+      };
 
+      if (GNUNET_OK !=
+          GNUNET_JSON_parse (value,
+                             spec,
+                             NULL, NULL))
+      {
+        GNUNET_break_op (0);
+        return GNUNET_SYSERR;
+      }
+    }
+    wgr->details.ok.webhooks_length = whook_len;
+    wgr->details.ok.webhooks = whook;
     wgh->cb (wgh->cb_cls,
-             &hr,
-             ies_len,
-             ies);
+             wgr);
     wgh->cb = NULL; /* just to be sure */
   }
-  return ret;
+  return GNUNET_OK;
 }
 
 
@@ -133,9 +137,9 @@ handle_get_webhooks_finished (void *cls,
 {
   struct TALER_MERCHANT_WebhooksGetHandle *wgh = cls;
   const json_t *json = response;
-  struct TALER_MERCHANT_HttpResponse hr = {
-    .http_status = (unsigned int) response_code,
-    .reply = json
+  struct TALER_MERCHANT_WebhooksGetResponse wgr = {
+    .hr.http_status = (unsigned int) response_code,
+    .hr.reply = json
   };
 
   wgh->job = NULL;
@@ -146,10 +150,10 @@ handle_get_webhooks_finished (void *cls,
   {
   case MHD_HTTP_OK:
     {
-      json_t *webhooks;
+      const json_t *webhooks;
       struct GNUNET_JSON_Specification spec[] = {
-        GNUNET_JSON_spec_json ("webhooks",
-                               &webhooks),
+        GNUNET_JSON_spec_array_const ("webhooks",
+                                      &webhooks),
         GNUNET_JSON_spec_end ()
       };
 
@@ -158,48 +162,39 @@ handle_get_webhooks_finished (void *cls,
                              spec,
                              NULL, NULL))
       {
-        hr.http_status = 0;
-        hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
+        wgr.hr.http_status = 0;
+        wgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
+        break;
       }
-      else
+      if (GNUNET_OK ==
+          parse_webhooks (webhooks,
+                          &wgr,
+                          wgh))
       {
-        if ( (! json_is_array (webhooks)) ||
-             (GNUNET_OK ==
-              parse_webhooks (webhooks,
-                              wgh)) )
-        {
-          GNUNET_JSON_parse_free (spec);
-          TALER_MERCHANT_webhooks_get_cancel (wgh);
-          return;
-        }
-        else
-        {
-          hr.http_status = 0;
-          hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
-        }
+        TALER_MERCHANT_webhooks_get_cancel (wgh);
+        return;
       }
-      GNUNET_JSON_parse_free (spec);
+      wgr.hr.http_status = 0;
+      wgr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
       break;
     }
   case MHD_HTTP_UNAUTHORIZED:
-    hr.ec = TALER_JSON_get_error_code (json);
-    hr.hint = TALER_JSON_get_error_hint (json);
+    wgr.hr.ec = TALER_JSON_get_error_code (json);
+    wgr.hr.hint = TALER_JSON_get_error_hint (json);
     /* Nothing really to verify, merchant says we need to authenticate. */
     break;
   default:
     /* unexpected response code */
-    hr.ec = TALER_JSON_get_error_code (json);
-    hr.hint = TALER_JSON_get_error_hint (json);
+    wgr.hr.ec = TALER_JSON_get_error_code (json);
+    wgr.hr.hint = TALER_JSON_get_error_hint (json);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                 "Unexpected response code %u/%d\n",
                 (unsigned int) response_code,
-                (int) hr.ec);
+                (int) wgr.hr.ec);
     break;
   }
   wgh->cb (wgh->cb_cls,
-           &hr,
-           0,
-           NULL);
+           &wgr);
   TALER_MERCHANT_webhooks_get_cancel (wgh);
 }