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LibWeb: Add definitions from '2.2.5 Requests' in the Fetch spec
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Linus Groh
Andreas Kling
parent
4f02bac39c
commit
7116a7d2bf
4 changed files with 671 additions and 0 deletions
230
Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Requests.cpp
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Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Requests.cpp
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/*
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* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Array.h>
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#include <LibWeb/Fetch/Infrastructure/HTTP/Requests.h>
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namespace Web::Fetch {
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// https://fetch.spec.whatwg.org/#concept-request-url
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AK::URL const& Request::url() const
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{
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// A request has an associated URL (a URL).
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// NOTE: Implementations are encouraged to make this a pointer to the first URL in request’s URL list. It is provided as a distinct field solely for the convenience of other standards hooking into Fetch.
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VERIFY(!m_url_list.is_empty());
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return m_url_list.first();
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}
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// https://fetch.spec.whatwg.org/#concept-request-current-url
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AK::URL const& Request::current_url()
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{
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// A request has an associated current URL. It is a pointer to the last URL in request’s URL list.
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VERIFY(!m_url_list.is_empty());
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return m_url_list.last();
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}
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void Request::set_url(AK::URL url)
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{
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// Sometimes setting the URL and URL list are done as two distinct steps in the spec,
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// but since we know the URL is always the URL list's first item and doesn't change later
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// on, we can combine them.
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VERIFY(m_url_list.is_empty());
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m_url_list.append(move(url));
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}
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// https://fetch.spec.whatwg.org/#request-destination-script-like
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bool Request::destination_is_script_like() const
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{
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// A request’s destination is script-like if it is "audioworklet", "paintworklet", "script", "serviceworker", "sharedworker", or "worker".
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static constexpr Array script_like_destinations = {
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Destination::AudioWorklet,
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Destination::PaintWorklet,
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Destination::Script,
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Destination::ServiceWorker,
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Destination::SharedWorker,
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Destination::Worker,
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};
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return any_of(script_like_destinations, [this](auto destination) {
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return m_destination == destination;
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});
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}
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// https://fetch.spec.whatwg.org/#subresource-request
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bool Request::is_subresource_request() const
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{
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// A subresource request is a request whose destination is "audio", "audioworklet", "font", "image", "manifest", "paintworklet", "script", "style", "track", "video", "xslt", or the empty string.
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static constexpr Array subresource_request_destinations = {
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Destination::Audio,
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Destination::AudioWorklet,
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Destination::Font,
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Destination::Image,
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Destination::Manifest,
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Destination::PaintWorklet,
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Destination::Script,
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Destination::Style,
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Destination::Track,
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Destination::Video,
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Destination::XSLT,
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};
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return any_of(subresource_request_destinations, [this](auto destination) {
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return m_destination == destination;
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}) || !m_destination.has_value();
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}
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// https://fetch.spec.whatwg.org/#non-subresource-request
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bool Request::is_non_subresource_request() const
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{
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// A non-subresource request is a request whose destination is "document", "embed", "frame", "iframe", "object", "report", "serviceworker", "sharedworker", or "worker".
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static constexpr Array non_subresource_request_destinations = {
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Destination::Document,
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Destination::Embed,
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Destination::Frame,
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Destination::IFrame,
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Destination::Object,
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Destination::Report,
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Destination::ServiceWorker,
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Destination::SharedWorker,
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Destination::Worker,
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};
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return any_of(non_subresource_request_destinations, [this](auto destination) {
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return m_destination == destination;
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});
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}
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// https://fetch.spec.whatwg.org/#navigation-request
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bool Request::is_navigation_request() const
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{
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// A navigation request is a request whose destination is "document", "embed", "frame", "iframe", or "object".
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static constexpr Array navigation_request_destinations = {
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Destination::Document,
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Destination::Embed,
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Destination::Frame,
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Destination::IFrame,
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Destination::Object,
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};
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return any_of(navigation_request_destinations, [this](auto destination) {
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return m_destination == destination;
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});
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}
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// https://fetch.spec.whatwg.org/#concept-request-tainted-origin
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bool Request::has_redirect_tainted_origin() const
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{
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// A request request has a redirect-tainted origin if these steps return true:
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// 1. Let lastURL be null.
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Optional<AK::URL const&> last_url;
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// 2. For each url in request’s URL list:
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for (auto const& url : m_url_list) {
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// 1. If lastURL is null, then set lastURL to url and continue.
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if (!last_url.has_value()) {
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last_url = url;
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continue;
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}
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// 2. If url’s origin is not same origin with lastURL’s origin and request’s origin is not same origin with lastURL’s origin, then return true.
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// FIXME: Actually use the given origins once we have https://url.spec.whatwg.org/#concept-url-origin.
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if (!HTML::Origin().is_same_origin(HTML::Origin()) && HTML::Origin().is_same_origin(HTML::Origin()))
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return true;
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// 3. Set lastURL to url.
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last_url = url;
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}
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// 3. Return false.
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return false;
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}
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// https://fetch.spec.whatwg.org/#serializing-a-request-origin
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String Request::serialize_origin() const
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{
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// 1. If request has a redirect-tainted origin, then return "null".
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if (has_redirect_tainted_origin())
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return "null"sv;
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// 2. Return request’s origin, serialized.
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return m_origin.get<HTML::Origin>().serialize();
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}
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// https://fetch.spec.whatwg.org/#byte-serializing-a-request-origin
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ErrorOr<ByteBuffer> Request::byte_serialize_origin() const
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{
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// Byte-serializing a request origin, given a request request, is to return the result of serializing a request origin with request, isomorphic encoded.
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return ByteBuffer::copy(serialize_origin().bytes());
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}
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// https://fetch.spec.whatwg.org/#concept-request-clone
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Request Request::clone() const
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{
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// To clone a request request, run these steps:
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// 1. Let newRequest be a copy of request, except for its body.
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BodyType body;
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swap(body, const_cast<BodyType&>(m_body));
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auto new_request = *this;
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swap(body, const_cast<BodyType&>(m_body));
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// FIXME: 2. If request’s body is non-null, set newRequest’s body to the result of cloning request’s body.
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// 3. Return newRequest.
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return new_request;
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}
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// https://fetch.spec.whatwg.org/#concept-request-add-range-header
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ErrorOr<void> Request::add_range_reader(u64 first, Optional<u64> const& last)
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{
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// To add a range header to a request request, with an integer first, and an optional integer last, run these steps:
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// 1. Assert: last is not given, or first is less than or equal to last.
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VERIFY(!last.has_value() || first <= last.value());
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// 2. Let rangeValue be `bytes=`.
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auto range_value = TRY(ByteBuffer::copy("bytes"sv.bytes()));
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// 3. Serialize and isomorphic encode first, and append the result to rangeValue.
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TRY(range_value.try_append(String::number(first).bytes()));
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// 4. Append 0x2D (-) to rangeValue.
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TRY(range_value.try_append('-'));
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// 5. If last is given, then serialize and isomorphic encode it, and append the result to rangeValue.
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if (last.has_value())
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TRY(range_value.try_append(String::number(*last).bytes()));
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// 6. Append (`Range`, rangeValue) to request’s header list.
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auto header = Header {
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.name = TRY(ByteBuffer::copy("Range"sv.bytes())),
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.value = move(range_value),
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};
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TRY(m_header_list.append(move(header)));
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return {};
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}
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// https://fetch.spec.whatwg.org/#cross-origin-embedder-policy-allows-credentials
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bool Request::cross_origin_embedder_policy_allows_credentials() const
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{
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// 1. If request’s mode is not "no-cors", then return true.
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if (m_mode != Mode::NoCORS)
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return true;
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// 2. If request’s client is null, then return true.
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if (m_client == nullptr)
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return true;
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// FIXME: 3. If request’s client’s policy container’s embedder policy’s value is not "credentialless", then return true.
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// 4. If request’s origin is same origin with request’s current URL’s origin and request does not have a redirect-tainted origin, then return true.
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// FIXME: Actually use the given origins once we have https://url.spec.whatwg.org/#concept-url-origin.
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if (HTML::Origin().is_same_origin(HTML::Origin()) && !has_redirect_tainted_origin())
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return true;
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// 5. Return false.
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return false;
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}
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}
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