libcurl.js/client/javascript/tls_socket.js

//currently broken

class TLSSocket {
  constructor(hostname, port, options={}) {
    check_loaded(true);

    this.hostname = hostname;
    this.port = port;
    this.url = `https://${hostname}:${port}`;
    this.options = options;

    this.onopen = () => {};
    this.onerror = () => {};
    this.onmessage = () => {};
    this.onclose = () => {};

    this.connected = false;
    this.event_loop = null;

    this.connect();
  }

  connect() {
    let response_info;
    let data_callback = () => {};
    let headers_callback = (info) => {
      response_info = info;
    }
    let finish_callback = (error) => {
      if (error === 0) {
        this.connected = true;
        this.event_loop = setInterval(() => {
          let data = this.recv();
          if (data != null) this.onmessage(data);
        }, 0);
        this.onopen();
      }
      else {
        this.cleanup(error);
      }
    }
    let request_options = {
      _connect_only: 1,
    }
    if (this.options.verbose) {
      request_options._libcurl_verbose = 1;
    }

    this.http_handle = perform_request(this.url, request_options, data_callback, finish_callback, headers_callback, null);
  }

  recv() {
    let buffer_size = 64*1024;
    let result_ptr = _recv_from_socket(this.http_handle, buffer_size);
    let data_ptr = _get_result_buffer(result_ptr);
    let result_code = _get_result_code(result_ptr);
    let result_closed = _get_result_closed(result_ptr);

    if (result_code === 0 && !result_closed) { //CURLE_OK - data received 
      let data_size = _get_result_size(result_ptr);
      let data_heap = Module.HEAPU8.subarray(data_ptr, data_ptr + data_size);
      let data = new Uint8Array(data_heap);
      this.onmessage(data)
    }
    
    else if (result_code === 0 && result_closed) {
      this.cleanup();
    }

    else if (result_code != 81) {
      this.cleanup(result_code);
    }

    _free(data_ptr);
    _free(result_ptr);
  }

  send(data_array) {
    if (!this.connected) return;
    let data_ptr = allocate_array(data_array);
    let data_len = data_array.length;
    _send_to_socket(this.http_handle, data_ptr, data_len);
    _free(data_ptr);
  }

  cleanup(error=false) {
    if (this.http_handle) _cleanup_handle(this.http_handle);
    else return;
    
    clearInterval(this.event_loop);
    this.connected = false;

    if (error) {
      this.onerror(error);
    }
    else {
      this.onclose();
    }
  }

  close() {
    this.cleanup();
  }
}