Cache immutable Wasm server configuration encoding

src/wasm/core.cpp

@@ -7,6 +7,7 @@
 
 #define __UCE_WASM_CORE__ 1
 #include "../lib/uce_lib.cpp"
+
 #include "../lib/mysql-connector.h"
 #include "../lib/sqlite-connector.h"
 
@@ -799,19 +800,26 @@ void uce_wasm_core_reset_request()
 	wasm_component_paths.clear();
 }
 
-// Host pushes the UCEB2-encoded request context into a guest buffer
-// (uce_alloc) and applies it here; mirrors the native param population.
-int uce_wasm_apply_context(const char* buf, size_t len)
+// Host pushes the worker-cached immutable configuration followed by the
+// dynamic UCEB2 request context into one guest buffer.
+int uce_wasm_apply_context(const char* config_buf, size_t config_len, const char* context_buf, size_t context_len)
 {
 	if(context == 0)
 		uce_wasm_core_init();
+	StringMap decoded_config;
 	DValue decoded;
 	String error;
-	if(!ucb_decode(String(buf, len), decoded, &error))
+	if(!ucb_decode_flat_string_map(String(config_buf, config_len), decoded_config, &error))
 	{
 		uce_host_log(3, error.data(), error.size());
 		return(1);
 	}
+	if(!ucb_decode(String(context_buf, context_len), decoded, &error))
+	{
+		uce_host_log(3, error.data(), error.size());
+		return(2);
+	}
+	wasm_server.config = std::move(decoded_config);
 	wasm_request.call = std::move(decoded);
 	DValue& applied = wasm_request.call;
 	auto apply_map = [](DValue* source, StringMap& dest) {
@@ -821,8 +829,6 @@ int uce_wasm_apply_context(const char* buf, size_t len)
 				dest[key] = item.to_string();
 			});
 	};
-	if(applied.key("server_config"))
-		apply_map(applied.key("server_config"), wasm_server.config);
 	apply_map(applied.key("params"), wasm_request.params);
 	wasm_request.response_code = wasm_request.params["GATEWAY_INTERFACE"] != "" ?
 		"Status: 200 OK" : "HTTP/1.1 200 OK";