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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/mtproto/HttpTransport.h"
#include "td/net/HttpHeaderCreator.h"
#include "td/utils/buffer.h"
#include "td/utils/common.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/Slice.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/Status.h"
// TODO: do I need \r\n as delimiter?
#include <tuple>
namespace td {
namespace mtproto {
namespace http {
Result<size_t> Transport::read_next(BufferSlice *message, uint32 *quick_ack) {
CHECK(can_read());
auto r_size = reader_.read_next(&http_query_);
if (r_size.is_error() || r_size.ok() != 0) {
return r_size;
}
if (http_query_.type_ != HttpQuery::Type::Response) {
return Status::Error("Unexpected HTTP query type");
}
if (http_query_.container_.size() != 2u) {
return Status::Error("Wrong response");
}
*message = std::move(http_query_.container_[1]);
turn_ = Write;
return 0;
}
void Transport::write(BufferWriter &&message, bool quick_ack) {
CHECK(can_write());
CHECK(!quick_ack);
/*
* POST /api HTTP/1.1
* Content-Length: [message->size()]
* Host: url
*/
HttpHeaderCreator hc;
Slice host;
Slice proxy_authorizarion;
std::tie(host, proxy_authorizarion) = split(Slice(secret_), '|');
if (host.empty()) {
hc.init_post("/api");
hc.add_header("Host", "");
hc.set_keep_alive();
} else {
hc.init_post(PSLICE() << "HTTP://" << host << ":80/api");
hc.add_header("Host", host);
hc.add_header("User-Agent", "curl/7.35.0");
hc.add_header("Accept", "*/*");
hc.add_header("Proxy-Connection", "keep-alive");
if (!proxy_authorizarion.empty()) {
hc.add_header("Proxy-Authorization", proxy_authorizarion);
}
}
hc.set_content_size(message.size());
auto r_head = hc.finish();
CHECK(r_head.is_ok());
Slice src = r_head.ok();
// LOG(DEBUG) << src;
MutableSlice dst = message.prepare_prepend();
dst.substr(dst.size() - src.size()).copy_from(src);
message.confirm_prepend(src.size());
output_->append(message.as_buffer_slice());
turn_ = Read;
}
bool Transport::can_read() const {
return turn_ == Read;
}
bool Transport::can_write() const {
return turn_ == Write;
}
size_t Transport::max_prepend_size() const {
if (secret_.empty()) {
return 96;
} else {
return (secret_.size() + 1) / 2 * 4 + 156;
}
}
size_t Transport::max_append_size() const {
return 0;
}
bool Transport::use_random_padding() const {
return false;
}
} // namespace http
} // namespace mtproto
} // namespace td
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