mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
550c28d7db
* Improve DHT store/load, pinging overlay peers * Fix speed limits in storage * Use keyStoreTypeDirectory in rldp-http-proxy and storage-daemon Mainly for caching synced block in tonlib. --------- Co-authored-by: SpyCheese <mikle98@yandex.ru>
534 lines
18 KiB
C++
534 lines
18 KiB
C++
/*
|
|
This file is part of TON Blockchain Library.
|
|
|
|
TON Blockchain Library is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
TON Blockchain Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2017-2020 Telegram Systems LLP
|
|
*/
|
|
|
|
#include "PeerActor.h"
|
|
#include "auto/tl/ton_api.hpp"
|
|
|
|
#include "tl-utils/tl-utils.hpp"
|
|
|
|
#include "td/utils/overloaded.h"
|
|
#include "td/utils/Random.h"
|
|
#include "vm/boc.h"
|
|
#include "common/delay.h"
|
|
|
|
namespace ton {
|
|
|
|
PeerState::State from_ton_api(const ton::ton_api::storage_state &state) {
|
|
PeerState::State res;
|
|
res.want_download = state.want_download_;
|
|
res.will_upload = state.will_upload_;
|
|
return res;
|
|
}
|
|
|
|
ton::ton_api::object_ptr<ton::ton_api::storage_state> to_ton_api(const PeerState::State &state) {
|
|
return ton::ton_api::make_object<ton::ton_api::storage_state>(state.will_upload, state.want_download);
|
|
}
|
|
|
|
PeerActor::PeerActor(td::unique_ptr<Callback> callback, std::shared_ptr<PeerState> state)
|
|
: callback_(std::move(callback)), state_(std::move(state)) {
|
|
CHECK(callback_);
|
|
}
|
|
|
|
template <class T, class... ArgsT>
|
|
td::uint64 PeerActor::create_and_send_query(ArgsT &&...args) {
|
|
return send_query(ton::create_serialize_tl_object<T>(std::forward<ArgsT>(args)...));
|
|
}
|
|
|
|
td::uint64 PeerActor::send_query(td::BufferSlice query) {
|
|
auto query_id = next_query_id_++;
|
|
callback_->send_query(query_id, std::move(query));
|
|
return query_id;
|
|
}
|
|
|
|
void PeerActor::schedule_loop() {
|
|
yield();
|
|
}
|
|
|
|
void PeerActor::notify_node() {
|
|
need_notify_node_ = true;
|
|
}
|
|
|
|
void PeerActor::execute_query(td::BufferSlice query, td::Promise<td::BufferSlice> promise) {
|
|
on_pong();
|
|
TRY_RESULT_PROMISE(promise, f, ton::fetch_tl_object<ton::ton_api::Function>(std::move(query), true));
|
|
ton::ton_api::downcast_call(
|
|
*f, td::overloaded(
|
|
[&](ton::ton_api::storage_ping &ping) {
|
|
execute_ping(static_cast<td::uint64>(ping.session_id_), std::move(promise));
|
|
},
|
|
[&](ton::ton_api::storage_addUpdate &add_update) { execute_add_update(add_update, std::move(promise)); },
|
|
[&](ton::ton_api::storage_getPiece &get_piece) { execute_get_piece(get_piece, std::move(promise)); },
|
|
[&](ton::ton_api::storage_getTorrentInfo &) { execute_get_torrent_info(std::move(promise)); },
|
|
[&](auto &other) { promise.set_error(td::Status::Error("Unknown function")); }));
|
|
schedule_loop();
|
|
}
|
|
|
|
void PeerActor::on_ping_result(td::Result<td::BufferSlice> r_answer) {
|
|
ping_query_id_ = {};
|
|
if (r_answer.is_ok()) {
|
|
on_pong();
|
|
}
|
|
}
|
|
|
|
void PeerActor::on_pong() {
|
|
wait_pong_till_ = td::Timestamp::in(10);
|
|
if (!state_->peer_online_.exchange(true)) {
|
|
state_->peer_online_set_ = true;
|
|
}
|
|
notify_node();
|
|
}
|
|
|
|
void PeerActor::on_update_result(td::Result<td::BufferSlice> r_answer) {
|
|
update_query_id_ = {};
|
|
if (r_answer.is_ok()) {
|
|
if (!peer_is_inited_) {
|
|
peer_init_offset_ += UPDATE_INIT_BLOCK_SIZE;
|
|
if (peer_init_offset_ >= have_pieces_.as_slice().size()) {
|
|
peer_is_inited_ = true;
|
|
}
|
|
}
|
|
} else {
|
|
have_pieces_list_.insert(have_pieces_list_.end(), sent_have_pieces_list_.begin(), sent_have_pieces_list_.end());
|
|
}
|
|
sent_have_pieces_list_.clear();
|
|
}
|
|
|
|
void PeerActor::on_get_piece_result(PartId piece_id, td::Result<td::BufferSlice> r_answer) {
|
|
//TODO: handle errors ???
|
|
auto res = [&]() -> td::Result<PeerState::Part> {
|
|
TRY_RESULT(slice, std::move(r_answer));
|
|
TRY_RESULT(piece, ton::fetch_result<ton::ton_api::storage_getPiece>(slice.as_slice()));
|
|
PeerState::Part res;
|
|
res.data = std::move(piece->data_);
|
|
res.proof = std::move(piece->proof_);
|
|
return std::move(res);
|
|
}();
|
|
if (res.is_error()) {
|
|
LOG(DEBUG) << "getPiece " << piece_id << " query: " << res.error();
|
|
} else {
|
|
LOG(DEBUG) << "getPiece " << piece_id << " query: OK";
|
|
}
|
|
state_->node_queries_results_.add_element(std::make_pair(piece_id, std::move(res)));
|
|
notify_node();
|
|
}
|
|
|
|
void PeerActor::on_update_state_result(td::Result<td::BufferSlice> r_answer) {
|
|
if (r_answer.is_error()) {
|
|
update_state_query_.query_id = {};
|
|
}
|
|
}
|
|
|
|
void PeerActor::on_get_info_result(td::Result<td::BufferSlice> r_answer) {
|
|
get_info_query_id_ = {};
|
|
next_get_info_at_ = td::Timestamp::in(5.0);
|
|
alarm_timestamp().relax(next_get_info_at_);
|
|
if (r_answer.is_error()) {
|
|
LOG(DEBUG) << "getTorrentInfo query: " << r_answer.move_as_error();
|
|
return;
|
|
}
|
|
auto R = fetch_tl_object<ton::ton_api::storage_torrentInfo>(r_answer.move_as_ok(), true);
|
|
if (R.is_error()) {
|
|
LOG(DEBUG) << "getTorrentInfo query: " << R.move_as_error();
|
|
return;
|
|
}
|
|
td::BufferSlice data = std::move(R.ok_ref()->data_);
|
|
LOG(DEBUG) << "getTorrentInfo query: got result (" << data.size() << " bytes)";
|
|
if (!data.empty() && !state_->torrent_info_ready_) {
|
|
state_->torrent_info_response_callback_(std::move(data));
|
|
}
|
|
}
|
|
|
|
void PeerActor::on_query_result(td::uint64 query_id, td::Result<td::BufferSlice> r_answer) {
|
|
if (r_answer.is_ok()) {
|
|
on_pong();
|
|
}
|
|
if (ping_query_id_ && ping_query_id_.value() == query_id) {
|
|
on_ping_result(std::move(r_answer));
|
|
} else if (update_query_id_ && update_query_id_.value() == query_id) {
|
|
on_update_result(std::move(r_answer));
|
|
} else if (update_state_query_.query_id && update_state_query_.query_id.value() == query_id) {
|
|
on_update_state_result(std::move(r_answer));
|
|
} else if (get_info_query_id_ && get_info_query_id_.value() == query_id) {
|
|
on_get_info_result(std::move(r_answer));
|
|
} else {
|
|
for (auto &query_it : node_get_piece_) {
|
|
if (query_it.second.query_id && query_it.second.query_id.value() == query_id) {
|
|
on_get_piece_result(query_it.first, std::move(r_answer));
|
|
node_get_piece_.erase(query_it.first);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
schedule_loop();
|
|
}
|
|
|
|
void PeerActor::start_up() {
|
|
callback_->register_self(actor_id(this));
|
|
|
|
node_session_id_ = td::Random::secure_uint64();
|
|
|
|
state_->peer = actor_id(this);
|
|
state_->peer_ready_ = true;
|
|
|
|
notify_node();
|
|
schedule_loop();
|
|
}
|
|
|
|
void PeerActor::loop() {
|
|
loop_ping();
|
|
loop_pong();
|
|
|
|
loop_update_init();
|
|
loop_update_state();
|
|
loop_update_pieces();
|
|
loop_get_torrent_info();
|
|
|
|
loop_node_get_piece();
|
|
loop_peer_get_piece();
|
|
|
|
loop_notify_node();
|
|
}
|
|
|
|
void PeerActor::loop_pong() {
|
|
if (wait_pong_till_ && wait_pong_till_.is_in_past()) {
|
|
wait_pong_till_ = {};
|
|
LOG(DEBUG) << "Disconnected from peer";
|
|
state_->peer_online_ = false;
|
|
notify_node();
|
|
}
|
|
alarm_timestamp().relax(wait_pong_till_);
|
|
}
|
|
|
|
void PeerActor::loop_ping() {
|
|
if (ping_query_id_) {
|
|
return;
|
|
}
|
|
if (!next_ping_at_.is_in_past()) {
|
|
alarm_timestamp().relax(next_ping_at_);
|
|
return;
|
|
}
|
|
|
|
next_ping_at_ = td::Timestamp::in(2);
|
|
alarm_timestamp().relax(next_ping_at_);
|
|
ping_query_id_ = create_and_send_query<ton::ton_api::storage_ping>(node_session_id_);
|
|
}
|
|
|
|
td::BufferSlice PeerActor::create_update_query(ton::tl_object_ptr<ton::ton_api::storage_Update> update) {
|
|
auto session_id = static_cast<td::int64>(peer_session_id_.value());
|
|
auto seqno = static_cast<td::int32>(++node_seqno_);
|
|
return ton::create_serialize_tl_object<ton::ton_api::storage_addUpdate>(session_id, seqno, std::move(update));
|
|
}
|
|
|
|
void PeerActor::loop_update_init() {
|
|
if (!peer_session_id_ || update_query_id_ || peer_is_inited_) {
|
|
return;
|
|
}
|
|
|
|
update_have_pieces();
|
|
|
|
auto node_state = state_->node_state_.load();
|
|
auto s = have_pieces_.as_slice();
|
|
if (s.size() <= peer_init_offset_) {
|
|
peer_is_inited_ = true;
|
|
return;
|
|
}
|
|
s = s.substr(peer_init_offset_, UPDATE_INIT_BLOCK_SIZE);
|
|
auto query = create_update_query(ton::create_tl_object<ton::ton_api::storage_updateInit>(
|
|
td::BufferSlice(s), (int)peer_init_offset_, to_ton_api(node_state)));
|
|
|
|
// take care about update_state_query initial state
|
|
update_state_query_.state = node_state;
|
|
update_state_query_.query_id = 0;
|
|
|
|
LOG(DEBUG) << "Sending updateInit query (" << update_state_query_.state.want_download << ", "
|
|
<< update_state_query_.state.will_upload << ", offset=" << peer_init_offset_ * 8 << ")";
|
|
update_query_id_ = send_query(std::move(query));
|
|
}
|
|
|
|
void PeerActor::loop_update_state() {
|
|
if (!peer_is_inited_) {
|
|
return;
|
|
}
|
|
|
|
auto node_state = state_->node_state_.load();
|
|
if (!(update_state_query_.state == node_state)) {
|
|
update_state_query_.state = node_state;
|
|
update_state_query_.query_id = {};
|
|
}
|
|
|
|
if (update_state_query_.query_id) {
|
|
return;
|
|
}
|
|
|
|
auto query = create_update_query(
|
|
ton::create_tl_object<ton::ton_api::storage_updateState>(to_ton_api(update_state_query_.state)));
|
|
LOG(DEBUG) << "Sending updateState query (" << update_state_query_.state.want_download << ", "
|
|
<< update_state_query_.state.will_upload << ")";
|
|
update_state_query_.query_id = send_query(std::move(query));
|
|
}
|
|
|
|
void PeerActor::update_have_pieces() {
|
|
auto node_ready_parts = state_->node_ready_parts_.read();
|
|
for (auto piece_id : node_ready_parts) {
|
|
if (piece_id < (peer_init_offset_ + UPDATE_INIT_BLOCK_SIZE) * 8 && !have_pieces_.get(piece_id)) {
|
|
have_pieces_list_.push_back(piece_id);
|
|
}
|
|
have_pieces_.set_one(piece_id);
|
|
}
|
|
}
|
|
|
|
void PeerActor::loop_update_pieces() {
|
|
if (update_query_id_ || !peer_is_inited_) {
|
|
return;
|
|
}
|
|
|
|
update_have_pieces();
|
|
|
|
if (!have_pieces_list_.empty()) {
|
|
size_t count = std::min<size_t>(have_pieces_list_.size(), 1500);
|
|
sent_have_pieces_list_.assign(have_pieces_list_.end() - count, have_pieces_list_.end());
|
|
have_pieces_list_.erase(have_pieces_list_.end() - count, have_pieces_list_.end());
|
|
auto query = create_update_query(ton::create_tl_object<ton::ton_api::storage_updateHavePieces>(
|
|
td::transform(sent_have_pieces_list_, [](auto x) { return static_cast<td::int32>(x); })));
|
|
LOG(DEBUG) << "Sending updateHavePieces query (" << sent_have_pieces_list_.size() << " pieces)";
|
|
update_query_id_ = send_query(std::move(query));
|
|
}
|
|
}
|
|
|
|
void PeerActor::loop_get_torrent_info() {
|
|
if (state_->torrent_info_ready_) {
|
|
if (!torrent_info_) {
|
|
torrent_info_ = state_->torrent_info_;
|
|
for (const auto &u : pending_update_peer_parts_) {
|
|
process_update_peer_parts(u);
|
|
}
|
|
pending_update_peer_parts_.clear();
|
|
}
|
|
return;
|
|
}
|
|
if (get_info_query_id_) {
|
|
return;
|
|
}
|
|
if (next_get_info_at_ && !next_get_info_at_.is_in_past()) {
|
|
return;
|
|
}
|
|
LOG(DEBUG) << "Sending getTorrentInfo query";
|
|
get_info_query_id_ = create_and_send_query<ton::ton_api::storage_getTorrentInfo>();
|
|
}
|
|
|
|
void PeerActor::loop_node_get_piece() {
|
|
for (auto part : state_->node_queries_.read()) {
|
|
if (state_->speed_limiters_.download.empty()) {
|
|
node_get_piece_.emplace(part, NodePieceQuery{});
|
|
} else {
|
|
if (!torrent_info_) {
|
|
CHECK(state_->torrent_info_ready_);
|
|
loop_get_torrent_info();
|
|
}
|
|
auto piece_size =
|
|
std::min<td::uint64>(torrent_info_->piece_size, torrent_info_->file_size - part * torrent_info_->piece_size);
|
|
td::Timestamp timeout = td::Timestamp::in(3.0);
|
|
td::actor::send_closure(
|
|
state_->speed_limiters_.download, &SpeedLimiter::enqueue, (double)piece_size, timeout,
|
|
[=, SelfId = actor_id(this)](td::Result<td::Unit> R) {
|
|
if (R.is_ok()) {
|
|
td::actor::send_closure(SelfId, &PeerActor::node_get_piece_query_ready, part, std::move(R));
|
|
} else {
|
|
delay_action(
|
|
[=, R = std::move(R)]() mutable {
|
|
td::actor::send_closure(SelfId, &PeerActor::node_get_piece_query_ready, part, std::move(R));
|
|
},
|
|
timeout);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
for (auto &query_it : node_get_piece_) {
|
|
if (query_it.second.query_id) {
|
|
continue;
|
|
}
|
|
|
|
LOG(DEBUG) << "Sending getPiece " << query_it.first << " query";
|
|
query_it.second.query_id =
|
|
create_and_send_query<ton::ton_api::storage_getPiece>(static_cast<td::int32>(query_it.first));
|
|
}
|
|
}
|
|
|
|
void PeerActor::node_get_piece_query_ready(PartId part, td::Result<td::Unit> R) {
|
|
if (R.is_error()) {
|
|
on_get_piece_result(part, R.move_as_error());
|
|
} else {
|
|
node_get_piece_.emplace(part, NodePieceQuery{});
|
|
}
|
|
schedule_loop();
|
|
}
|
|
|
|
void PeerActor::loop_peer_get_piece() {
|
|
// process answers
|
|
for (auto &p : state_->peer_queries_results_.read()) {
|
|
state_->peer_queries_active_.erase(p.first);
|
|
auto promise_it = peer_get_piece_.find(p.first);
|
|
if (promise_it == peer_get_piece_.end()) {
|
|
continue;
|
|
}
|
|
td::Promise<PeerState::Part> promise =
|
|
[i = p.first, promise = std::move(promise_it->second.promise)](td::Result<PeerState::Part> R) mutable {
|
|
LOG(DEBUG) << "Responding to getPiece " << i << ": " << (R.is_ok() ? "OK" : R.error().to_string());
|
|
promise.set_result(R.move_map([](PeerState::Part part) {
|
|
return create_serialize_tl_object<ton_api::storage_piece>(std::move(part.proof), std::move(part.data));
|
|
}));
|
|
};
|
|
if (p.second.is_error()) {
|
|
promise.set_error(p.second.move_as_error());
|
|
} else {
|
|
auto part = p.second.move_as_ok();
|
|
auto size = (double)part.data.size();
|
|
td::Promise<td::Unit> P = promise.wrap([part = std::move(part)](td::Unit) mutable { return std::move(part); });
|
|
if (state_->speed_limiters_.upload.empty()) {
|
|
P.set_result(td::Unit());
|
|
} else {
|
|
td::actor::send_closure(state_->speed_limiters_.upload, &SpeedLimiter::enqueue, size, td::Timestamp::in(3.0),
|
|
std::move(P));
|
|
}
|
|
}
|
|
peer_get_piece_.erase(promise_it);
|
|
notify_node();
|
|
}
|
|
|
|
// create queries
|
|
std::vector<td::uint32> new_peer_queries;
|
|
for (auto &query_it : peer_get_piece_) {
|
|
if (state_->peer_queries_active_.insert(query_it.first).second) {
|
|
new_peer_queries.push_back(query_it.first);
|
|
notify_node();
|
|
}
|
|
}
|
|
state_->peer_queries_.add_elements(std::move(new_peer_queries));
|
|
}
|
|
|
|
void PeerActor::loop_notify_node() {
|
|
if (!need_notify_node_) {
|
|
return;
|
|
}
|
|
need_notify_node_ = false;
|
|
state_->notify_node();
|
|
}
|
|
|
|
void PeerActor::execute_ping(td::uint64 session_id, td::Promise<td::BufferSlice> promise) {
|
|
if (!peer_session_id_ || peer_session_id_.value() != session_id) {
|
|
peer_session_id_ = session_id;
|
|
peer_is_inited_ = false;
|
|
peer_init_offset_ = 0;
|
|
|
|
update_query_id_ = {};
|
|
update_state_query_.query_id = {};
|
|
}
|
|
|
|
promise.set_value(ton::create_serialize_tl_object<ton::ton_api::storage_pong>());
|
|
}
|
|
|
|
void PeerActor::execute_add_update(ton::ton_api::storage_addUpdate &add_update, td::Promise<td::BufferSlice> promise) {
|
|
auto session_id = static_cast<td::uint64>(add_update.session_id_);
|
|
if (session_id != node_session_id_) {
|
|
promise.set_error(td::Status::Error(404, "INVALID_SESSION"));
|
|
return;
|
|
}
|
|
promise.set_value(ton::create_serialize_tl_object<ton::ton_api::storage_ok>());
|
|
|
|
auto seqno = static_cast<td::uint32>(add_update.seqno_);
|
|
auto update_peer_state = [&](PeerState::State peer_state) {
|
|
if (peer_seqno_ >= seqno) {
|
|
return;
|
|
}
|
|
if (state_->peer_state_ready_ && state_->peer_state_.load() == peer_state) {
|
|
return;
|
|
}
|
|
LOG(DEBUG) << "Processing update peer state query (" << peer_state.want_download << ", " << peer_state.will_upload
|
|
<< ")";
|
|
peer_seqno_ = seqno;
|
|
state_->peer_state_.exchange(peer_state);
|
|
state_->peer_state_ready_ = true;
|
|
notify_node();
|
|
};
|
|
downcast_call(
|
|
*add_update.update_,
|
|
td::overloaded(
|
|
[&](const ton::ton_api::storage_updateHavePieces &have_pieces) {},
|
|
[&](const ton::ton_api::storage_updateState &state) { update_peer_state(from_ton_api(*state.state_)); },
|
|
[&](const ton::ton_api::storage_updateInit &init) { update_peer_state(from_ton_api(*init.state_)); }));
|
|
if (torrent_info_) {
|
|
process_update_peer_parts(add_update.update_);
|
|
} else {
|
|
pending_update_peer_parts_.push_back(std::move(add_update.update_));
|
|
}
|
|
}
|
|
|
|
void PeerActor::process_update_peer_parts(const tl_object_ptr<ton_api::storage_Update> &update) {
|
|
CHECK(torrent_info_);
|
|
td::uint64 pieces_count = torrent_info_->pieces_count();
|
|
std::vector<td::uint32> new_peer_ready_parts;
|
|
auto add_piece = [&](PartId id) {
|
|
if (id < pieces_count && !peer_have_pieces_.get(id)) {
|
|
peer_have_pieces_.set_one(id);
|
|
new_peer_ready_parts.push_back(id);
|
|
notify_node();
|
|
}
|
|
};
|
|
downcast_call(*update,
|
|
td::overloaded(
|
|
[&](const ton::ton_api::storage_updateHavePieces &have_pieces) {
|
|
LOG(DEBUG) << "Processing updateHavePieces query (" << have_pieces.piece_id_ << " pieces)";
|
|
for (auto id : have_pieces.piece_id_) {
|
|
add_piece(id);
|
|
}
|
|
},
|
|
[&](const ton::ton_api::storage_updateState &state) {},
|
|
[&](const ton::ton_api::storage_updateInit &init) {
|
|
LOG(DEBUG) << "Processing updateInit query (offset=" << init.have_pieces_offset_ * 8 << ")";
|
|
td::Bitset new_bitset;
|
|
new_bitset.set_raw(init.have_pieces_.as_slice().str());
|
|
size_t offset = init.have_pieces_offset_ * 8;
|
|
for (auto size = new_bitset.size(), i = size_t(0); i < size; i++) {
|
|
if (new_bitset.get(i)) {
|
|
add_piece(static_cast<PartId>(offset + i));
|
|
}
|
|
}
|
|
}));
|
|
state_->peer_ready_parts_.add_elements(std::move(new_peer_ready_parts));
|
|
}
|
|
|
|
void PeerActor::execute_get_piece(ton::ton_api::storage_getPiece &get_piece, td::Promise<td::BufferSlice> promise) {
|
|
PartId piece_id = get_piece.piece_id_;
|
|
peer_get_piece_[piece_id] = {std::move(promise)};
|
|
}
|
|
|
|
void PeerActor::execute_get_torrent_info(td::Promise<td::BufferSlice> promise) {
|
|
td::BufferSlice result = create_serialize_tl_object<ton_api::storage_torrentInfo>(
|
|
state_->torrent_info_ready_ ? vm::std_boc_serialize(state_->torrent_info_->as_cell()).move_as_ok()
|
|
: td::BufferSlice());
|
|
if (state_->torrent_info_ready_) {
|
|
LOG(DEBUG) << "Responding to getTorrentInfo: " << result.size() << " bytes";
|
|
} else {
|
|
LOG(DEBUG) << "Responding to getTorrentInfo: no info";
|
|
}
|
|
promise.set_result(std::move(result));
|
|
}
|
|
} // namespace ton
|