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LibWeb: Add public get accessor function for Blob's internal ByteBuffer

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Blob::bytes() returns the ReadonlyBytes representation of our internal
ByteBuffer.

This change requires us to ByteBuffer::copy() Blob's ReadonlyBytes to a
ByteBuffer in XHR::send() and corresponding error handling of the copy
operation.

This removes the need for Blob to declare XMLHttpRequest as a friend
class.
This commit is contained in:
Kenneth Myhra 2022-07-24 15:43:33 +02:00 • committed by Linus Groh
parent 417a385db1
commit 622a4f29a7
3 changed files with 16 additions and 7 deletions
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2
Userland/Libraries/LibWeb/FileAPI/Blob.cpp
View file

@ -76,7 +76,7 @@ ErrorOr<ByteBuffer> Blob::process_blob_parts(Vector<BlobPart> const& blob_parts)
},
// 3. If element is a Blob, append the bytes it represents to bytes.
[&](NonnullRefPtr<Blob> const& blob) -> ErrorOr<void> {
return bytes.try_append(blob->m_byte_buffer.bytes());
return bytes.try_append(blob->bytes());
}));
}
return bytes;

4
Userland/Libraries/LibWeb/FileAPI/Blob.h
View file

@ -48,14 +48,14 @@ public:
virtual JS::Object* create_wrapper(JS::GlobalObject&);
ReadonlyBytes bytes() const { return m_byte_buffer.bytes(); }
private:
Blob() = default;
static ErrorOr<ByteBuffer> process_blob_parts(Vector<BlobPart> const& blob_parts);
ByteBuffer m_byte_buffer {};
String m_type {};
friend class XHR::XMLHttpRequest;
};
}

17
Userland/Libraries/LibWeb/XHR/XMLHttpRequest.cpp
View file

@ -475,10 +475,19 @@ DOM::ExceptionOr<void> XMLHttpRequest::send(Optional<XMLHttpRequestBodyInit> bod
auto request = LoadRequest::create_for_url_on_page(request_url, m_window->page());
request.set_method(m_method);
if (body_with_type.has_value()) {
body_with_type->body.source().visit(
[&](ByteBuffer const& buffer) { request.set_body(buffer); },
[&](NonnullRefPtr<FileAPI::Blob> const& blob) { request.set_body(blob->m_byte_buffer); },
[](auto&) {});
TRY_OR_RETURN_OOM(body_with_type->body.source().visit(
[&](ByteBuffer const& buffer) -> ErrorOr<void> {
request.set_body(buffer);
return {};
},
[&](NonnullRefPtr<FileAPI::Blob> const& blob) -> ErrorOr<void> {
auto byte_buffer = TRY(ByteBuffer::copy(blob->bytes()));
request.set_body(byte_buffer);
return {};
},
[](auto&) -> ErrorOr<void> {
return {};
}));
if (body_with_type->type.has_value())
request.set_header("Content-Type", String { body_with_type->type->span() });
}