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c14d5f27f9
ReadLoop requests require the chunks to be Uint8Array objects, however, TextEncoderStream requires a String (Convertible) value. This is fixed by implementing read_all_chunks as a loop of DefaultReader requests instead, which is an identity transformation. This should be okay to do, as stream chunk steps expect a JS::Value, and convert it to the type they want.
111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
/*
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* Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/SinglyLinkedList.h>
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#include <LibJS/Forward.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Streams/ReadableStreamGenericReader.h>
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namespace Web::Streams {
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struct ReadableStreamReadResult {
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JS::Value value;
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bool done;
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};
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class ReadRequest : public JS::Cell {
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GC_CELL(ReadRequest, JS::Cell);
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public:
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virtual ~ReadRequest() = default;
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virtual void on_chunk(JS::Value chunk) = 0;
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virtual void on_close() = 0;
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virtual void on_error(JS::Value error) = 0;
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};
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class ReadLoopReadRequest final : public ReadRequest {
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GC_CELL(ReadLoopReadRequest, ReadRequest);
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GC_DECLARE_ALLOCATOR(ReadLoopReadRequest);
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public:
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// successSteps, which is an algorithm accepting a byte sequence
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using SuccessSteps = GC::Function<void(ByteBuffer)>;
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// failureSteps, which is an algorithm accepting a JavaScript value
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using FailureSteps = GC::Function<void(JS::Value error)>;
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// AD-HOC: callback triggered on every chunk received from the stream.
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using ChunkSteps = GC::Function<void(ByteBuffer)>;
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ReadLoopReadRequest(JS::VM& vm, JS::Realm& realm, ReadableStreamDefaultReader& reader, GC::Ref<SuccessSteps> success_steps, GC::Ref<FailureSteps> failure_steps, GC::Ptr<ChunkSteps> chunk_steps = {});
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virtual void on_chunk(JS::Value chunk) override;
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virtual void on_close() override;
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virtual void on_error(JS::Value error) override;
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private:
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virtual void visit_edges(Visitor&) override;
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JS::VM& m_vm;
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GC::Ref<JS::Realm> m_realm;
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GC::Ref<ReadableStreamDefaultReader> m_reader;
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ByteBuffer m_bytes;
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GC::Ref<SuccessSteps> m_success_steps;
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GC::Ref<FailureSteps> m_failure_steps;
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GC::Ptr<ChunkSteps> m_chunk_steps;
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};
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// https://streams.spec.whatwg.org/#readablestreamdefaultreader
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class ReadableStreamDefaultReader final
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: public Bindings::PlatformObject
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, public ReadableStreamGenericReaderMixin {
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WEB_PLATFORM_OBJECT(ReadableStreamDefaultReader, Bindings::PlatformObject);
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GC_DECLARE_ALLOCATOR(ReadableStreamDefaultReader);
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public:
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static WebIDL::ExceptionOr<GC::Ref<ReadableStreamDefaultReader>> construct_impl(JS::Realm&, GC::Ref<ReadableStream>);
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// AD-HOC: Callback functions for read_all_chunks
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// successSteps, which is an algorithm accepting a JavaScript value
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using ReadAllOnSuccessSteps = GC::Function<void()>;
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// failureSteps, which is an algorithm accepting a JavaScript value
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using ReadAllOnFailureSteps = GC::Function<void(JS::Value error)>;
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// AD-HOC: callback triggered on every chunk received from the stream.
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using ReadAllOnChunkSteps = GC::Function<void(JS::Value chunk)>;
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virtual ~ReadableStreamDefaultReader() override = default;
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GC::Ref<WebIDL::Promise> read();
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void read_a_chunk(Fetch::Infrastructure::IncrementalReadLoopReadRequest& read_request);
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void read_all_bytes(GC::Ref<ReadLoopReadRequest::SuccessSteps>, GC::Ref<ReadLoopReadRequest::FailureSteps>);
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void read_all_chunks(GC::Ref<ReadAllOnChunkSteps>, GC::Ref<ReadAllOnSuccessSteps>, GC::Ref<ReadAllOnFailureSteps>);
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GC::Ref<WebIDL::Promise> read_all_bytes_deprecated();
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void release_lock();
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SinglyLinkedList<GC::Ref<ReadRequest>>& read_requests() { return m_read_requests; }
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private:
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explicit ReadableStreamDefaultReader(JS::Realm&);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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SinglyLinkedList<GC::Ref<ReadRequest>> m_read_requests;
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};
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}
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