124 lines
4.0 KiB
C++
124 lines
4.0 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/net/NetQueryDelayer.h"
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#include "td/telegram/Global.h"
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#include "td/telegram/net/NetQueryDispatcher.h"
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#include "td/utils/common.h"
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#include "td/utils/format.h"
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#include "td/utils/logging.h"
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#include "td/utils/misc.h"
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#include "td/utils/Slice.h"
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#include "td/utils/Status.h"
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namespace td {
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void NetQueryDelayer::delay(NetQueryPtr query) {
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query->debug("trying to delay");
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query->is_ready();
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CHECK(query->is_error());
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auto code = query->error().code();
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double timeout = 0;
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if (code < 0) {
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// skip
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} else if (code == 500) {
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auto msg = query->error().message();
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if (msg == "WORKER_BUSY_TOO_LONG_RETRY") {
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timeout = 1; // it is dangerous to resend query without timeout, so use 1
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}
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} else if (code == 420) {
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auto msg = query->error().message();
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for (auto prefix :
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{Slice("FLOOD_WAIT_"), Slice("SLOWMODE_WAIT_"), Slice("2FA_CONFIRM_WAIT_"), Slice("TAKEOUT_INIT_DELAY_")}) {
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if (begins_with(msg, prefix)) {
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timeout = clamp(to_integer<int>(msg.substr(prefix.size())), 1, 14 * 24 * 60 * 60);
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break;
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}
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}
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} else {
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G()->net_query_dispatcher().dispatch(std::move(query));
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return;
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}
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if (timeout == 0) {
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timeout = query->next_timeout_;
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if (timeout < 60) {
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query->next_timeout_ *= 2;
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}
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} else {
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query->next_timeout_ = 1;
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}
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query->total_timeout_ += timeout;
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query->last_timeout_ = timeout;
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auto error = query->error().move_as_error();
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query->resend();
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// Fix for infinity flood control
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if (!query->need_resend_on_503_ && code == -503) {
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query->set_error(Status::Error(502, "Bad Gateway"));
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query->debug("DcManager: send to DcManager");
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G()->net_query_dispatcher().dispatch(std::move(query));
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return;
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}
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if (query->total_timeout_ > query->total_timeout_limit_) {
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// TODO: support timeouts in DcAuth and GetConfig
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LOG(WARNING) << "Failed: " << query << " " << tag("timeout", timeout) << tag("total_timeout", query->total_timeout_)
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<< " because of " << error << " from " << query->source_;
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// NB: code must differ from tdapi FLOOD_WAIT code
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query->set_error(
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Status::Error(429, PSLICE() << "Too Many Requests: retry after " << static_cast<int32>(timeout + 0.999)));
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query->debug("DcManager: send to DcManager");
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G()->net_query_dispatcher().dispatch(std::move(query));
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return;
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}
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LOG(WARNING) << "Delay: " << query << " " << tag("timeout", timeout) << tag("total_timeout", query->total_timeout_)
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<< " because of " << error << " from " << query->source_;
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query->debug(PSTRING() << "delay for " << format::as_time(timeout));
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auto id = container_.create(QuerySlot());
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auto *query_slot = container_.get(id);
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query_slot->query_ = std::move(query);
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query_slot->timeout_.set_event(EventCreator::yield(actor_shared(this, id)));
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query_slot->timeout_.set_timeout_in(timeout);
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}
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void NetQueryDelayer::wakeup() {
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auto link_token = get_link_token();
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if (link_token) {
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on_slot_event(link_token);
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}
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loop();
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}
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void NetQueryDelayer::on_slot_event(uint64 id) {
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auto *slot = container_.get(id);
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if (slot == nullptr) {
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return;
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}
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auto query = std::move(slot->query_);
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if (!query->invoke_after().empty()) {
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// Fail query after timeout expired if it is a part of an invokeAfter chain.
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// It is not necessary but helps to avoid server problems, when previous query was lost.
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query->set_error_resend_invoke_after();
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}
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slot->timeout_.close();
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container_.erase(id);
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G()->net_query_dispatcher().dispatch(std::move(query));
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}
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void NetQueryDelayer::tear_down() {
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container_.for_each([](auto id, auto &query_slot) {
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query_slot.query_->set_error(Status::Error(500, "Request aborted"));
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G()->net_query_dispatcher().dispatch(std::move(query_slot.query_));
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});
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}
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} // namespace td
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