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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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(*new ImageResource(request));
return adopt(*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 String encoding_from_content_type(const String& content_type)
{
auto offset = content_type.index_of("charset=");
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 "utf-8";
}
static String mime_type_from_content_type(const String& content_type)
{
auto offset = content_type.index_of(";");
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)
{
VERIFY(!m_loaded);
m_encoded_data = ByteBuffer::copy(data);
m_response_headers = headers;
m_loaded = true;
auto content_type = headers.get("Content-Type");
if (content_type.has_value()) {
#if RESOURCE_DEBUG
dbgln("Content-Type header: '{}'", content_type.value());
#endif
m_encoding = encoding_from_content_type(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_encoding = "utf-8"; // FIXME: This doesn't seem nice.
m_mime_type = url().data_mime_type();
} else {
#if RESOURCE_DEBUG
dbgln("No Content-Type header to go on! Guessing based on filename...");
#endif
m_encoding = "utf-8"; // FIXME: This doesn't seem nice.
m_mime_type = Core::guess_mime_type_based_on_filename(url().path());
}
for_each_client([](auto& client) {
client.resource_did_load();
});
}
void Resource::did_fail(Badge<ResourceLoader>, const String& error)
{
m_error = error;
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);
}
}
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