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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/SharedBuffer.h>
28#include <LibCore/File.h>
29#include <LibHTML/ResourceLoader.h>
30#include <LibProtocol/Client.h>
31#include <LibProtocol/Download.h>
32
33ResourceLoader& ResourceLoader::the()
34{
35 static ResourceLoader* s_the;
36 if (!s_the)
37 s_the = &ResourceLoader::construct().leak_ref();
38 return *s_the;
39}
40
41ResourceLoader::ResourceLoader()
42 : m_protocol_client(Protocol::Client::construct())
43{
44}
45
46void ResourceLoader::load(const URL& url, Function<void(const ByteBuffer&)> callback)
47{
48 if (url.protocol() == "file") {
49 auto f = Core::File::construct();
50 f->set_filename(url.path());
51 if (!f->open(Core::IODevice::OpenMode::ReadOnly)) {
52 dbg() << "ResourceLoader::load: Error: " << f->error_string();
53 callback({});
54 return;
55 }
56
57 auto data = f->read_all();
58 deferred_invoke([data = move(data), callback = move(callback)](auto&) {
59 callback(data);
60 });
61 return;
62 }
63
64 if (url.protocol() == "http") {
65 auto download = protocol_client().start_download(url.to_string());
66 download->on_finish = [this, callback = move(callback)](bool success, const ByteBuffer& payload, auto) {
67 --m_pending_loads;
68 if (on_load_counter_change)
69 on_load_counter_change();
70 if (!success) {
71 dbg() << "HTTP load failed!";
72 callback({});
73 return;
74 }
75 callback(ByteBuffer::copy(payload.data(), payload.size()));
76 };
77 ++m_pending_loads;
78 if (on_load_counter_change)
79 on_load_counter_change();
80 return;
81 }
82
83 dbg() << "Unimplemented protocol: " << url.protocol();
84 ASSERT_NOT_REACHED();
85}