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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Base64.h>
#include <AK/Debug.h>
#include <AK/JsonObject.h>
#include <LibCore/EventLoop.h>
#include <LibCore/File.h>
#include <LibProtocol/Request.h>
#include <LibProtocol/RequestClient.h>
#include <LibWeb/Loader/ContentFilter.h>
#include <LibWeb/Loader/LoadRequest.h>
#include <LibWeb/Loader/Resource.h>
#include <LibWeb/Loader/ResourceLoader.h>
namespace Web {
ResourceLoader& ResourceLoader::the()
{
static ResourceLoader* s_the;
if (!s_the)
s_the = &ResourceLoader::construct().leak_ref();
return *s_the;
}
ResourceLoader::ResourceLoader()
: m_protocol_client(Protocol::RequestClient::construct())
, m_user_agent(default_user_agent)
{
}
void ResourceLoader::load_sync(const LoadRequest& request, Function<void(ReadonlyBytes, const HashMap<String, String, CaseInsensitiveStringTraits>& response_headers, Optional<u32> status_code)> success_callback, Function<void(const String&, Optional<u32> status_code)> error_callback)
{
Core::EventLoop loop;
load(
request,
[&](auto data, auto& response_headers, auto status_code) {
success_callback(data, response_headers, status_code);
loop.quit(0);
},
[&](auto& string, auto status_code) {
if (error_callback)
error_callback(string, status_code);
loop.quit(0);
});
loop.exec();
}
static HashMap<LoadRequest, NonnullRefPtr<Resource>> s_resource_cache;
RefPtr<Resource> ResourceLoader::load_resource(Resource::Type type, const LoadRequest& request)
{
if (!request.is_valid())
return nullptr;
bool use_cache = request.url().protocol() != "file";
if (use_cache) {
auto it = s_resource_cache.find(request);
if (it != s_resource_cache.end()) {
if (it->value->type() != type) {
dbgln("FIXME: Not using cached resource for {} since there's a type mismatch.", request.url());
} else {
dbgln_if(CACHE_DEBUG, "Reusing cached resource for: {}", request.url());
return it->value;
}
}
}
auto resource = Resource::create({}, type, request);
if (use_cache)
s_resource_cache.set(request, resource);
load(
request,
[=](auto data, auto& headers, auto status_code) {
const_cast<Resource&>(*resource).did_load({}, data, headers, status_code);
},
[=](auto& error, auto status_code) {
const_cast<Resource&>(*resource).did_fail({}, error, status_code);
});
return resource;
}
void ResourceLoader::load(const LoadRequest& request, Function<void(ReadonlyBytes, const HashMap<String, String, CaseInsensitiveStringTraits>& response_headers, Optional<u32> status_code)> success_callback, Function<void(const String&, Optional<u32> status_code)> error_callback)
{
auto& url = request.url();
if (is_port_blocked(url.port())) {
dbgln("ResourceLoader::load: Error: blocked port {} from URL {}", url.port(), url);
return;
}
if (ContentFilter::the().is_filtered(url)) {
dbgln("\033[32;1mResourceLoader::load: URL was filtered! {}\033[0m", url);
error_callback("URL was filtered", {});
return;
}
if (url.protocol() == "about") {
dbgln("Loading about: URL {}", url);
deferred_invoke([success_callback = move(success_callback)](auto&) {
success_callback(String::empty().to_byte_buffer(), {}, {});
});
return;
}
if (url.protocol() == "data") {
dbgln("ResourceLoader loading a data URL with mime-type: '{}', base64={}, payload='{}'",
url.data_mime_type(),
url.data_payload_is_base64(),
url.data_payload());
ByteBuffer data;
if (url.data_payload_is_base64())
data = decode_base64(url.data_payload());
else
data = url.data_payload().to_byte_buffer();
deferred_invoke([data = move(data), success_callback = move(success_callback)](auto&) {
success_callback(data, {}, {});
});
return;
}
if (url.protocol() == "file") {
auto f = Core::File::construct();
f->set_filename(url.path());
if (!f->open(Core::OpenMode::ReadOnly)) {
dbgln("ResourceLoader::load: Error: {}", f->error_string());
if (error_callback)
error_callback(f->error_string(), {});
return;
}
auto data = f->read_all();
deferred_invoke([data = move(data), success_callback = move(success_callback)](auto&) {
success_callback(data, {}, {});
});
return;
}
if (url.protocol() == "http" || url.protocol() == "https" || url.protocol() == "gemini") {
HashMap<String, String> headers;
headers.set("User-Agent", m_user_agent);
headers.set("Accept-Encoding", "gzip, deflate");
for (auto& it : request.headers()) {
headers.set(it.key, it.value);
}
auto protocol_request = protocol_client().start_request(request.method(), url.to_string_encoded(), headers, request.body());
if (!protocol_request) {
if (error_callback)
error_callback("Failed to initiate load", {});
return;
}
protocol_request->on_buffered_request_finish = [this, success_callback = move(success_callback), error_callback = move(error_callback), protocol_request](bool success, auto, auto& response_headers, auto status_code, ReadonlyBytes payload) {
--m_pending_loads;
if (on_load_counter_change)
on_load_counter_change();
if (!success) {
if (error_callback)
error_callback("HTTP load failed", {});
return;
}
deferred_invoke([protocol_request](auto&) {
// Clear circular reference of `protocol_request` captured by copy
const_cast<Protocol::Request&>(*protocol_request).on_buffered_request_finish = nullptr;
});
success_callback(payload, response_headers, status_code);
};
protocol_request->set_should_buffer_all_input(true);
protocol_request->on_certificate_requested = []() -> Protocol::Request::CertificateAndKey {
return {};
};
++m_pending_loads;
if (on_load_counter_change)
on_load_counter_change();
return;
}
if (error_callback)
error_callback(String::formatted("Protocol not implemented: {}", url.protocol()), {});
}
void ResourceLoader::load(const URL& url, Function<void(ReadonlyBytes, const HashMap<String, String, CaseInsensitiveStringTraits>& response_headers, Optional<u32> status_code)> success_callback, Function<void(const String&, Optional<u32> status_code)> error_callback)
{
LoadRequest request;
request.set_url(url);
load(request, move(success_callback), move(error_callback));
}
bool ResourceLoader::is_port_blocked(int port)
{
int ports[] { 1, 7, 9, 11, 13, 15, 17, 19, 20, 21, 22, 23, 25, 37, 42,
43, 53, 77, 79, 87, 95, 101, 102, 103, 104, 109, 110, 111, 113,
115, 117, 119, 123, 135, 139, 143, 179, 389, 465, 512, 513, 514,
515, 526, 530, 531, 532, 540, 556, 563, 587, 601, 636, 993, 995,
2049, 3659, 4045, 6000, 6379, 6665, 6666, 6667, 6668, 6669, 9000 };
for (auto blocked_port : ports)
if (port == blocked_port)
return true;
return false;
}
void ResourceLoader::clear_cache()
{
dbgln("Clearing {} items from ResourceLoader cache", s_resource_cache.size());
s_resource_cache.clear();
}
}
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