ftp works but it blocks the thread

client/javascript/main.js

@@ -41,82 +41,6 @@ function check_loaded(check_websocket) {
     throw new Error("websocket proxy url not set, please call libcurl.set_websocket");
   }
 }
-
-//wrap perform_request in a promise
-function perform_request_async(url, params, body) {
-  return new Promise((resolve, reject) => {
-    let stream_controller;
-    let http_handle;
-    let response_obj;
-    let aborted = false;
-
-    //handle abort signals
-    if (params.signal instanceof AbortSignal) {
-      params.signal.addEventListener("abort", () => {
-        if (aborted) return;
-        aborted = true;
-        _cleanup_handle(http_handle);
-        if (!response_obj) {
-          reject(new DOMException("The operation was aborted."));
-        }
-        else {
-          stream_controller.error("The operation was aborted.");
-        }
-      });
-    }
-
-    let stream = new ReadableStream({
-      start(controller) {
-        stream_controller = controller;
-      }
-    });
-    
-    function data_callback(new_data) {
-      try {
-        stream_controller.enqueue(new_data);  
-      }
-      catch (e) {
-        //the readable stream has been closed elsewhere, so cancel the request
-        if (e instanceof TypeError) {
-          _cleanup_handle(http_handle);
-        }
-        else {
-          throw e;
-        }
-      }
-    }
-    function headers_callback() {
-      let response_json = c_func_str(_http_get_info, [http_handle]);
-      response_obj = create_response(stream, JSON.parse(response_json));
-      resolve(response_obj);
-    }
-    function finish_callback(error) {
-      if (error != 0) {
-        error_msg(`Request "${url}" failed with error code ${error}: ${get_error_str(error)}`);
-        reject(`Request failed with error code ${error}: ${get_error_str(error)}`);
-        return;
-      }
-      try {
-        stream_controller.close();
-      } //this will only fail if the stream is already errored or closed, which isn't a problem
-      catch {}
-    }
-
-    let body_length = body ? body.length : 0;
-    let params_json = JSON.stringify(params);
-    
-    http_handle = create_request(url, data_callback, finish_callback, headers_callback);
-    c_func(_http_set_options, [http_handle, params_json, body, body_length]);
-    start_request(http_handle);
-  });
-}
-
-async function libcurl_fetch(url, params={}) {
-  check_loaded(true);
-  let body = await create_options(params);
-  return await perform_request_async(url, params, body);
-}
-
 function set_websocket_url(url) {
   websocket_url = url;
   if (Module.websocket) {
@@ -177,7 +101,9 @@ api = {
   WebSocket: WebSocket,
   CurlWebSocket: CurlWebSocket,
   TLSSocket: TLSSocket,
-  fetch: () => {throw "not ready"},
+  HTTPSession: HTTPSession,
+  FTPSession: FTPSession,
+  fetch() {throw "not ready"},
   
   get copyright() {return copyright_notice},
   get version() {return get_version()},