1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/Function.h>
#include <LibCore/MimeData.h>
#include <LibWeb/HTML/HTMLImageElement.h>
#include <LibWeb/Loader/Resource.h>
namespace Web {
NonnullRefPtr<Resource> Resource::create(Badge<ResourceLoader>, Type type, const LoadRequest& request)
{
if (type == Type::Image)
return adopt_ref(*new ImageResource(request));
return adopt_ref(*new Resource(type, request));
}
Resource::Resource(Type type, const LoadRequest& request)
: m_request(request)
, m_type(type)
{
}
Resource::~Resource()
{
}
void Resource::for_each_client(Function<void(ResourceClient&)> callback)
{
Vector<WeakPtr<ResourceClient>, 16> clients_copy;
clients_copy.ensure_capacity(m_clients.size());
for (auto* client : m_clients)
clients_copy.append(client->make_weak_ptr());
for (auto client : clients_copy) {
if (client)
callback(*client);
}
}
static Optional<String> encoding_from_content_type(const String& content_type)
{
auto offset = content_type.find("charset="sv);
if (offset.has_value()) {
auto encoding = content_type.substring(offset.value() + 8, content_type.length() - offset.value() - 8).to_lowercase();
if (encoding.length() >= 2 && encoding.starts_with('"') && encoding.ends_with('"'))
return encoding.substring(1, encoding.length() - 2);
if (encoding.length() >= 2 && encoding.starts_with('\'') && encoding.ends_with('\''))
return encoding.substring(1, encoding.length() - 2);
return encoding;
}
return {};
}
static String mime_type_from_content_type(const String& content_type)
{
auto offset = content_type.find(';');
if (offset.has_value())
return content_type.substring(0, offset.value()).to_lowercase();
return content_type;
}
void Resource::did_load(Badge<ResourceLoader>, ReadonlyBytes data, const HashMap<String, String, CaseInsensitiveStringTraits>& headers, Optional<u32> status_code)
{
VERIFY(!m_loaded);
// FIXME: Handle OOM failure.
m_encoded_data = ByteBuffer::copy(data).release_value();
m_response_headers = headers;
m_status_code = move(status_code);
m_loaded = true;
auto content_type = headers.get("Content-Type");
if (content_type.has_value()) {
dbgln_if(RESOURCE_DEBUG, "Content-Type header: '{}'", content_type.value());
m_mime_type = mime_type_from_content_type(content_type.value());
} else if (url().protocol() == "data" && !url().data_mime_type().is_empty()) {
dbgln_if(RESOURCE_DEBUG, "This is a data URL with mime-type _{}_", url().data_mime_type());
m_mime_type = url().data_mime_type();
} else {
auto content_type_options = headers.get("X-Content-Type-Options");
if (content_type_options.value_or("").equals_ignoring_case("nosniff")) {
m_mime_type = "text/plain";
} else {
m_mime_type = Core::guess_mime_type_based_on_filename(url().path());
}
}
m_encoding = {};
if (content_type.has_value()) {
auto encoding = encoding_from_content_type(content_type.value());
if (encoding.has_value()) {
dbgln_if(RESOURCE_DEBUG, "Set encoding '{}' from Content-Type", encoding.has_value());
m_encoding = encoding.value();
}
}
for_each_client([](auto& client) {
client.resource_did_load();
});
}
void Resource::did_fail(Badge<ResourceLoader>, const String& error, Optional<u32> status_code)
{
m_error = error;
m_status_code = move(status_code);
m_failed = true;
for_each_client([](auto& client) {
client.resource_did_fail();
});
}
void Resource::register_client(Badge<ResourceClient>, ResourceClient& client)
{
VERIFY(!m_clients.contains(&client));
m_clients.set(&client);
}
void Resource::unregister_client(Badge<ResourceClient>, ResourceClient& client)
{
VERIFY(m_clients.contains(&client));
m_clients.remove(&client);
}
void ResourceClient::set_resource(Resource* resource)
{
if (m_resource)
m_resource->unregister_client({}, *this);
m_resource = resource;
if (m_resource) {
VERIFY(resource->type() == client_type());
m_resource->register_client({}, *this);
// Make sure that reused resources also have their load callback fired.
if (resource->is_loaded())
resource_did_load();
// Make sure that reused resources also have their fail callback fired.
if (resource->is_failed())
resource_did_fail();
}
}
ResourceClient::~ResourceClient()
{
if (m_resource)
m_resource->unregister_client({}, *this);
}
}
|
