Method state_send_server_request_header

src/proxy/http/HttpSM.cc:2098–2184

}

int
HttpSM::state_send_server_request_header(int event, void *data)
{
  ink_assert(server_entry != nullptr);
  ink_assert(server_entry->eos == false);
  ink_assert(server_entry->write_vio == (VIO *)data);
  STATE_ENTER(&HttpSM::state_send_server_request_header, event);

  int method;

  switch (event) {
  case VC_EVENT_WRITE_READY:
    server_entry->write_vio->reenable();
    break;

  case VC_EVENT_WRITE_COMPLETE:
    // We are done sending the request header, deallocate
    //  our buffer and then decide what to do next
    if (server_entry->write_buffer) {
      free_MIOBuffer(server_entry->write_buffer);
      server_entry->write_buffer = nullptr;
      method                     = t_state.hdr_info.server_request.method_get_wksidx();
      if (!t_state.api_server_request_body_set && method != HTTP_WKSIDX_TRACE &&
          _ua.get_txn()->has_request_body(t_state.hdr_info.request_content_length,
                                          t_state.client_info.transfer_encoding == HttpTransact::CHUNKED_ENCODING)) {
        if (post_transform_info.vc) {
          setup_transform_to_server_transfer();
        } else {
          // Go ahead and set up the post tunnel if we are not waiting for a 100 response
          if (!t_state.hdr_info.client_request.m_100_continue_required) {
            do_setup_client_request_body_tunnel(HTTP_SERVER_VC);
          }
        }
      }
      // Any other events to these read response
      if (server_entry->vc_type == HTTP_SERVER_VC) {
        server_entry->vc_read_handler = &HttpSM::state_read_server_response_header;
      }
    }

    break;

  case VC_EVENT_EOS:
    // EOS of stream comes from the read side.  Treat it as
    //  as error if there is nothing in the read buffer.  If
    //  there is something the server may have blasted back
    //  the response before receiving the request.  Happens
    //  often with redirects
    //
    //  If we are in the middle of an api callout, it
    //    means we haven't actually sent the request yet
    //    so the stuff in the buffer is garbage and we
    //    want to ignore it
    //
    server_entry->eos = true;

    // I'm not sure about the above comment, but if EOS is received on read and we are
    // still in this state, we must have not gotten WRITE_COMPLETE.  With epoll we might not receive EOS