mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2026-04-18 18:00:31 +00:00
c5f117f1a2
To avoid some churn, Body::source() returns the SourceTypeInternal object, as it's not exposed to JS. The constructor is also adjusted so that Body::clone() doesn't have to convert to a SourceType and then immediately back again.
225 lines
8.8 KiB
C++
225 lines
8.8 KiB
C++
/*
|
||
* Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>
|
||
* Copyright (c) 2024, Jelle Raaijmakers <jelle@ladybird.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include <LibJS/Runtime/PromiseCapability.h>
|
||
#include <LibWeb/Bindings/ExceptionOrUtils.h>
|
||
#include <LibWeb/Bindings/MainThreadVM.h>
|
||
#include <LibWeb/Fetch/BodyInit.h>
|
||
#include <LibWeb/Fetch/Infrastructure/HTTP/Bodies.h>
|
||
#include <LibWeb/Fetch/Infrastructure/IncrementalReadLoopReadRequest.h>
|
||
#include <LibWeb/Fetch/Infrastructure/Task.h>
|
||
#include <LibWeb/HTML/Scripting/TemporaryExecutionContext.h>
|
||
#include <LibWeb/Streams/ReadableStream.h>
|
||
|
||
namespace Web::Fetch::Infrastructure {
|
||
|
||
GC_DEFINE_ALLOCATOR(Body);
|
||
|
||
// https://mimesniff.spec.whatwg.org/#reading-the-resource-header
|
||
// To read the resource header, a user agent MUST read bytes of the resource until one of the following conditions is met:
|
||
// - the end of the resource is reached
|
||
// - 1445 or more bytes have been read
|
||
static constexpr size_t MAX_SNIFF_BYTES = 1445;
|
||
|
||
static Body::SourceTypeInternal to_source_type_internal(Body::SourceType&& source_type)
|
||
{
|
||
return source_type.visit(
|
||
[](Empty) -> Body::SourceTypeInternal { return Empty {}; },
|
||
[](ByteBuffer& buffer) -> Body::SourceTypeInternal { return move(buffer); },
|
||
[](GC::Root<FileAPI::Blob> const& blob) -> Body::SourceTypeInternal { return GC::Ref { *blob }; });
|
||
}
|
||
|
||
GC::Ref<Body> Body::create(JS::VM& vm, GC::Ref<Streams::ReadableStream> stream)
|
||
{
|
||
return vm.heap().allocate<Body>(stream);
|
||
}
|
||
|
||
GC::Ref<Body> Body::create(JS::VM& vm, GC::Ref<Streams::ReadableStream> stream, SourceType source, Optional<u64> length)
|
||
{
|
||
return create(vm, stream, to_source_type_internal(move(source)), length);
|
||
}
|
||
|
||
GC::Ref<Body> Body::create(JS::VM& vm, GC::Ref<Streams::ReadableStream> stream, SourceTypeInternal source, Optional<u64> length)
|
||
{
|
||
return vm.heap().allocate<Body>(stream, source, length);
|
||
}
|
||
|
||
Body::Body(GC::Ref<Streams::ReadableStream> stream)
|
||
: m_stream(stream)
|
||
{
|
||
}
|
||
|
||
Body::Body(GC::Ref<Streams::ReadableStream> stream, SourceTypeInternal source, Optional<u64> length)
|
||
: m_stream(stream)
|
||
, m_source(move(source))
|
||
, m_length(move(length))
|
||
{
|
||
}
|
||
|
||
void Body::visit_edges(Cell::Visitor& visitor)
|
||
{
|
||
Base::visit_edges(visitor);
|
||
visitor.visit(m_stream);
|
||
visitor.visit(m_sniff_bytes_callback);
|
||
m_source.visit(
|
||
[&](GC::Ref<FileAPI::Blob> const& blob) { visitor.visit(blob); },
|
||
[](auto const&) {});
|
||
}
|
||
|
||
void Body::append_sniff_bytes(ReadonlyBytes bytes)
|
||
{
|
||
if (m_sniff_bytes_complete)
|
||
return;
|
||
|
||
size_t space_remaining = MAX_SNIFF_BYTES - m_sniff_bytes.size();
|
||
if (space_remaining == 0) {
|
||
set_sniff_bytes_complete();
|
||
return;
|
||
}
|
||
|
||
size_t to_append = min(bytes.size(), space_remaining);
|
||
m_sniff_bytes.append(bytes.slice(0, to_append));
|
||
|
||
if (m_sniff_bytes.size() >= MAX_SNIFF_BYTES)
|
||
set_sniff_bytes_complete();
|
||
}
|
||
|
||
void Body::set_sniff_bytes_complete()
|
||
{
|
||
if (m_sniff_bytes_complete)
|
||
return;
|
||
m_sniff_bytes_complete = true;
|
||
if (m_sniff_bytes_callback) {
|
||
auto callback = exchange(m_sniff_bytes_callback, nullptr);
|
||
callback->function()(m_sniff_bytes);
|
||
}
|
||
}
|
||
|
||
Optional<ReadonlyBytes> Body::sniff_bytes_if_available() const
|
||
{
|
||
// Non-streaming body: source has bytes
|
||
if (m_source.has<ByteBuffer>()) {
|
||
auto const& buffer = m_source.get<ByteBuffer>();
|
||
return buffer.bytes().slice(0, min(buffer.size(), MAX_SNIFF_BYTES));
|
||
}
|
||
|
||
if (m_source.has<GC::Ref<FileAPI::Blob>>()) {
|
||
auto raw = m_source.get<GC::Ref<FileAPI::Blob>>()->raw_bytes();
|
||
return raw.slice(0, min(raw.size(), MAX_SNIFF_BYTES));
|
||
}
|
||
|
||
// Streaming body: bytes captured during fetch
|
||
if (m_sniff_bytes_complete)
|
||
return m_sniff_bytes;
|
||
|
||
// Still waiting for bytes
|
||
return {};
|
||
}
|
||
|
||
void Body::wait_for_sniff_bytes(SniffBytesCallback on_ready)
|
||
{
|
||
if (auto bytes = sniff_bytes_if_available(); bytes.has_value()) {
|
||
on_ready->function()(bytes.value());
|
||
return;
|
||
}
|
||
|
||
// Wait for bytes to arrive
|
||
m_sniff_bytes_callback = on_ready;
|
||
}
|
||
|
||
// https://fetch.spec.whatwg.org/#concept-body-clone
|
||
GC::Ref<Body> Body::clone(JS::Realm& realm)
|
||
{
|
||
HTML::TemporaryExecutionContext execution_context { realm, HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
|
||
// To clone a body body, run these steps:
|
||
// 1. Let « out1, out2 » be the result of teeing body’s stream.
|
||
auto [out1, out2] = m_stream->tee(&realm).release_value_but_fixme_should_propagate_errors();
|
||
|
||
// 2. Set body’s stream to out1.
|
||
m_stream = out1;
|
||
|
||
// 3. Return a body whose stream is out2 and other members are copied from body.
|
||
return Body::create(realm.vm(), *out2, m_source, m_length);
|
||
}
|
||
|
||
// https://fetch.spec.whatwg.org/#body-fully-read
|
||
void Body::fully_read(JS::Realm& realm, Web::Fetch::Infrastructure::Body::ProcessBodyCallback process_body, Web::Fetch::Infrastructure::Body::ProcessBodyErrorCallback process_body_error, TaskDestination task_destination) const
|
||
{
|
||
HTML::TemporaryExecutionContext execution_context { realm, HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
|
||
// 1. If taskDestination is null, then set taskDestination to the result of starting a new parallel queue.
|
||
if (task_destination.has<Empty>())
|
||
task_destination = HTML::ParallelQueue::create();
|
||
|
||
// 2. Let successSteps given a byte sequence bytes be to queue a fetch task to run processBody given bytes, with taskDestination.
|
||
auto success_steps = [&realm, process_body, task_destination](ByteBuffer bytes) {
|
||
queue_fetch_task(task_destination, GC::create_function(realm.heap(), [process_body, bytes = move(bytes)]() mutable {
|
||
process_body->function()(move(bytes));
|
||
}));
|
||
};
|
||
|
||
// 3. Let errorSteps optionally given an exception exception be to queue a fetch task to run processBodyError given
|
||
// exception, with taskDestination.
|
||
auto error_steps = [&realm, process_body_error, task_destination](JS::Value exception) {
|
||
queue_fetch_task(task_destination, GC::create_function(realm.heap(), [process_body_error, exception]() {
|
||
process_body_error->function()(exception);
|
||
}));
|
||
};
|
||
|
||
// 4. Let reader be the result of getting a reader for body’s stream. If that threw an exception, then run errorSteps
|
||
// with that exception and return.
|
||
auto reader = m_stream->get_a_reader();
|
||
|
||
if (reader.is_exception()) {
|
||
auto throw_completion = Bindings::exception_to_throw_completion(realm.vm(), reader.release_error());
|
||
error_steps(throw_completion.release_value());
|
||
return;
|
||
}
|
||
|
||
// 5. Read all bytes from reader, given successSteps and errorSteps.
|
||
reader.value()->read_all_bytes(GC::create_function(realm.heap(), move(success_steps)), GC::create_function(realm.heap(), move(error_steps)));
|
||
}
|
||
|
||
// https://fetch.spec.whatwg.org/#body-incrementally-read
|
||
void Body::incrementally_read(ProcessBodyChunkCallback process_body_chunk, ProcessEndOfBodyCallback process_end_of_body, ProcessBodyErrorCallback process_body_error, TaskDestination task_destination)
|
||
{
|
||
HTML::TemporaryExecutionContext const execution_context { m_stream->realm(), HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
|
||
|
||
// 1. If taskDestination is null, then set taskDestination to the result of starting a new parallel queue.
|
||
if (task_destination.has<Empty>())
|
||
task_destination = HTML::ParallelQueue::create();
|
||
|
||
// 2. Let reader be the result of getting a reader for body’s stream.
|
||
// NOTE: This operation will not throw an exception.
|
||
auto reader = MUST(m_stream->get_a_reader());
|
||
|
||
// 3. Perform the incrementally-read loop given reader, taskDestination, processBodyChunk, processEndOfBody, and processBodyError.
|
||
VERIFY(!task_destination.has<Empty>());
|
||
incrementally_read_loop(reader, task_destination.get<GC::Ref<JS::Object>>(), process_body_chunk, process_end_of_body, process_body_error);
|
||
}
|
||
|
||
// https://fetch.spec.whatwg.org/#incrementally-read-loop
|
||
void Body::incrementally_read_loop(Streams::ReadableStreamDefaultReader& reader, TaskDestination task_destination, ProcessBodyChunkCallback process_body_chunk, ProcessEndOfBodyCallback process_end_of_body, ProcessBodyErrorCallback process_body_error)
|
||
{
|
||
auto& realm = reader.realm();
|
||
// 1. Let readRequest be the following read request:
|
||
auto read_request = realm.create<IncrementalReadLoopReadRequest>(*this, reader, task_destination, process_body_chunk, process_end_of_body, process_body_error);
|
||
|
||
// 2. Read a chunk from reader given readRequest.
|
||
reader.read_a_chunk(read_request);
|
||
}
|
||
|
||
// https://fetch.spec.whatwg.org/#byte-sequence-as-a-body
|
||
GC::Ref<Body> byte_sequence_as_body(JS::Realm& realm, ReadonlyBytes bytes)
|
||
{
|
||
// To get a byte sequence bytes as a body, return the body of the result of safely extracting bytes.
|
||
auto [body, _] = safely_extract_body(realm, bytes);
|
||
return body;
|
||
}
|
||
|
||
}
|