Method write_partial

lib/cpp/src/thrift/transport/TSSLSocket.cpp:546–584

* Returns number of bytes written in SSL Socket. * If eventSafe is set, and it may returns 0 bytes then write method * needs to be called again until it is successfull or it throws * exception incase of failure. */

 * exception incase of failure.
*/
uint32_t TSSLSocket::write_partial(const uint8_t* buf, uint32_t len) {
  initializeHandshake();
  if (!checkHandshake())
    return 0;
  // loop in case SSL_MODE_ENABLE_PARTIAL_WRITE is set in SSL_CTX.
  uint32_t written = 0;
  while (written < len) {
    ERR_clear_error();
    int32_t bytes = SSL_write(ssl_, &buf[written], len - written);
    if (bytes <= 0) {
      int errno_copy = THRIFT_GET_SOCKET_ERROR;
      int error = SSL_get_error(ssl_, bytes);
      switch (error) {
        case SSL_ERROR_SYSCALL:
          if ((errno_copy != THRIFT_EINTR)
              && (errno_copy != THRIFT_EAGAIN)) {
            break;
          }
        // fallthrough
        case SSL_ERROR_WANT_READ:
        case SSL_ERROR_WANT_WRITE:
          if (isLibeventSafe()) {
            return 0;
          }
          else {
            // in the case of SSL_ERROR_SYSCALL we want to wait for an write event again
            waitForEvent(error == SSL_ERROR_WANT_READ);
            continue;
          }
        default:;// do nothing
      }
      string errors;
      buildErrors(errors, errno_copy, error);
      throw TSSLException("SSL_write: " + errors);
    }
    written += bytes;
  }
  return written;
}

void TSSLSocket::flush() {
  resetConsumedMessageSize();