core: Make a place to implement the server-side websocket handling in C, conditionally.

src/httpd.app.c

@@ -1,6 +1,7 @@
 #include "httpd.js.h"
 
 #include "http.h"
+#include "log.h"
 #include "mem.h"
 #include "ssb.db.h"
 #include "ssb.h"
@@ -8,6 +9,7 @@
 #include "util.js.h"
 
 #include "picohttpparser.h"
+#include "uv.h"
 
 #include <stdlib.h>
 
@@ -211,7 +213,12 @@ void tf_httpd_endpoint_app(tf_http_request_t* request)
 	tf_ssb_run_work(ssb, _httpd_endpoint_app_blob_work, _httpd_endpoint_app_blob_after_work, data);
 }
 
-void tf_httpd_endpoint_app_socket(tf_http_request_t* request)
+static void _tf_httpd_endpoint_app_socket_c(tf_http_request_t* request)
+{
+	tf_printf("Unimplemented.\n");
+}
+
+static void _tf_httpd_endpoint_app_socket_js(tf_http_request_t* request)
 {
 	tf_task_t* task = request->user_data;
 	tf_ssb_t* ssb = tf_task_get_ssb(task);
@@ -250,3 +257,25 @@ void tf_httpd_endpoint_app_socket(tf_http_request_t* request)
 	JS_FreeValue(context, exports);
 	JS_FreeValue(context, global);
 }
+
+void tf_httpd_endpoint_app_socket(tf_http_request_t* request)
+{
+	static bool checked_env;
+	static bool use_c;
+	if (!checked_env)
+	{
+		char buffer[8] = { 0 };
+		size_t buffer_size = sizeof(buffer);
+		use_c = uv_os_getenv("TF_APP_C", buffer, &buffer_size) == 0 && strcmp(buffer, "1") == 0;
+		checked_env = true;
+	}
+
+	if (use_c)
+	{
+		_tf_httpd_endpoint_app_socket_c(request);
+	}
+	else
+	{
+		_tf_httpd_endpoint_app_socket_js(request);
+	}
+}

src/ssb.c

@@ -2402,7 +2402,6 @@ tf_ssb_t* tf_ssb_create(uv_loop_t* loop, JSContext* context, const char* db_path
 
 	char buffer[8] = { 0 };
 	size_t buffer_size = sizeof(buffer);
-	buffer_size = sizeof(buffer);
 	ssb->verbose = uv_os_getenv("TF_SSB_VERBOSE", buffer, &buffer_size) == 0 && strcmp(buffer, "1") == 0;
 
 	if (context)