WiP: added auction_brandt as extension

- added an extension to handle auctions via libbrandt
  - /extensions/auction_brandt GET and POST handler defined
  - initial parsing of transcript.json implemented, yet WiP

- multiple cleanups and changes to extension handling

1 files changed, 43 insertions, 0 deletions

diff --git a/src/exchange/taler-exchange-httpd.c b/src/exchange/taler-exchange-httpd.c
index d7651d79..68fc9fb7 100644
--- a/src/exchange/taler-exchange-httpd.c
+++ b/src/exchange/taler-exchange-httpd.c
@@ -1040,6 +1040,42 @@ handle_post_auditors (struct TEH_RequestContext *rc,
                                root);
 }
 
+/**
+ * Handle GET "/extensions/..." requests.
+ *
+ * @param rc request context
+ * @param args array of additional options
+ * @return MHD result code
+ */
+static MHD_RESULT
+handle_get_extensions (struct TEH_RequestContext *rc,
+                       const char *const args[])
+{
+  const struct TALER_Extension *ext = NULL;
+
+  if (NULL == args[0])
+  {
+    GNUNET_break_op (0);
+    return r404 (rc->connection,
+                 "/extensions/$EXTENSION");
+  }
+
+  ext = TALER_extensions_get_by_name (args[0]);
+  if (NULL == ext)
+  {
+    GNUNET_break_op (0);
+    return r404 (rc->connection,
+                 "/extensions/$EXTENSION unknown");
+  }
+
+  if (NULL == ext->http_get_handler)
+    return MHD_HTTP_NOT_IMPLEMENTED;
+
+  return ext->http_get_handler (
+    rc->connection,
+    &args[1]);
+}
+
 
 /**
  * Handle POST "/extensions/..." requests.
@@ -1301,6 +1337,13 @@ handle_mhd_request (void *cls,
     /* extensions endpoints */
     {
       .url = "extensions",
+      .method = MHD_HTTP_METHOD_GET,
+      .handler.get = &handle_get_extensions,
+      .nargs = 4, /* Arbitrary upper bound */
+      .nargs_is_upper_bound = true,
+    },
+    {
+      .url = "extensions",
       .method = MHD_HTTP_METHOD_POST,
       .handler.post = &handle_post_extensions,
       .nargs = 4, /* Arbitrary upper bound */