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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * SPDX-License-Identifier: EUPL-1.2 |
| 5 | * |
| 6 | * This file is part of icap-flow. |
| 7 | * |
| 8 | * Licensed under the EUPL, Version 1.2 only (the "Licence"); |
| 9 | * you may not use this work except in compliance with the Licence. |
| 10 | * You may obtain a copy of the Licence at: |
| 11 | * |
| 12 | * https://joinup.ec.europa.eu/collection/eupl/eupl-text-eupl-12 |
| 13 | * |
| 14 | * Unless required by applicable law or agreed to in writing, software |
| 15 | * distributed under the Licence is distributed on an "AS IS" basis, |
| 16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 17 | */ |
| 18 | |
| 19 | declare(strict_types=1); |
| 20 | |
| 21 | namespace Ndrstmr\Icap\Transport; |
| 22 | |
| 23 | use Amp\Cancellation; |
| 24 | use Ndrstmr\Icap\Config; |
| 25 | |
| 26 | /** |
| 27 | * Capability of a transport that hands out a {@see TransportSession}: a connection that carries more than one |
| 28 | * write/read round trip. {@see AsyncAmpTransport} and {@see SynchronousStreamTransport} implement it. |
| 29 | * |
| 30 | * A preview that the server answers with `100 Continue` is continued on the connection it began on (RFC 3507 ยง4.5), |
| 31 | * so {@see \Ndrstmr\Icap\IcapClient} refuses `scanFileWithPreview*()` with a transport that does not implement this |
| 32 | * interface (a `\LogicException`, before a file is opened or a connection made). Everything else works with |
| 33 | * {@see TransportInterface} alone. |
| 34 | */ |
| 35 | interface SessionAwareTransport extends TransportInterface |
| 36 | { |
| 37 | /** |
| 38 | * Open a session against the host described by $config. The |
| 39 | * caller MUST eventually call {@see TransportSession::release()} |
| 40 | * or {@see TransportSession::close()} on the returned session. |
| 41 | */ |
| 42 | public function openSession(Config $config, ?Cancellation $cancellation = null): TransportSession; |
| 43 | } |