[*] Added a greeting output for a simple GET request. Moved from the features-5056 branch.

dap-sdk/net/server/json_rpc/src/dap_json_rpc.c

@@ -19,11 +19,19 @@ void _json_rpc_http_proc(struct dap_http_simple *a_client, void *a_arg)
 {
     log_it(L_DEBUG, "Proc json_rpc request");
     http_status_code_t *l_http_code = (http_status_code_t*)a_arg;
-    dap_json_rpc_request_t *l_request = dap_json_rpc_request_from_json(a_client->request);
-    if (l_request){
-        dap_json_rpc_request_handler(l_request, a_client);
+    if (!a_client->request){
+        dap_http_simple_reply_f(a_client, "JSON-RPC request was not formed. "
+                                          "JSON-RPC must represent a method containing objects from an object, "
+                                          "this is a string the name of the method, id is a number and params "
+                                          "is an array that can contain strings, numbers and boolean values.");
     } else {
-        *l_http_code = Http_Status_NotFound;
+        dap_json_rpc_request_t *l_request = dap_json_rpc_request_from_json(a_client->request);
+        if (l_request) {
+            dap_json_rpc_request_handler(l_request, a_client);
+            dap_http_out_header_add_f(a_client->http_client, "Content-Type", "application/json");
+        } else {
+            *l_http_code = Http_Status_NotFound;
+        }
     }
     *l_http_code = Http_Status_OK;
 }