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LibWeb: Set up the Fetch response's body with the appropriate stream

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Timothy Flynn 2024-01-25 14:40:55 -05:00 committed by Andreas Kling
parent 2bb751eab9
commit 09124fc3a5
3 changed files with 23 additions and 5 deletions
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1
Tests/LibWeb/Text/expected/Streams/init-from-fetch.txt Normal file
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@ -0,0 +1 @@
Was able to create a reader from a Fetch response!

14
Tests/LibWeb/Text/input/Streams/init-from-fetch.html Normal file
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@ -0,0 +1,14 @@
<script src="../include.js"></script>
<script>
asyncTest(async done => {
fetch("./../basic.html", { mode: "no-cors" })
.then(response => response.body)
.then(body => {
const reader = body.getReader();
reader.read();
println("Was able to create a reader from a Fetch response!");
done();
});
});
</script>

13
Userland/Libraries/LibWeb/Fetch/BodyInit.cpp
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@ -8,7 +8,10 @@
#include <LibJS/Runtime/Completion.h>
#include <LibWeb/Fetch/BodyInit.h>
#include <LibWeb/Fetch/Infrastructure/HTTP/Bodies.h>
#include <LibWeb/FileAPI/Blob.h>
#include <LibWeb/HTML/FormControlInfrastructure.h>
#include <LibWeb/HTML/Scripting/TemporaryExecutionContext.h>
#include <LibWeb/Streams/AbstractOperations.h>
#include <LibWeb/URL/URLSearchParams.h>
#include <LibWeb/WebIDL/AbstractOperations.h>
#include <LibWeb/WebIDL/Buffers.h>
@ -33,6 +36,8 @@ WebIDL::ExceptionOr<Infrastructure::BodyWithType> safely_extract_body(JS::Realm&
// https://fetch.spec.whatwg.org/#concept-bodyinit-extract
WebIDL::ExceptionOr<Infrastructure::BodyWithType> extract_body(JS::Realm& realm, BodyInitOrReadableBytes const& object, bool keepalive)
{
HTML::TemporaryExecutionContext execution_context { Bindings::host_defined_environment_settings_object(realm), HTML::TemporaryExecutionContext::CallbacksEnabled::Yes };
auto& vm = realm.vm();
// 1. Let stream be null.
@ -44,14 +49,12 @@ WebIDL::ExceptionOr<Infrastructure::BodyWithType> extract_body(JS::Realm& realm,
}
// 3. Otherwise, if object is a Blob object, set stream to the result of running object’s get stream.
else if (auto const* blob_handle = object.get_pointer<JS::Handle<FileAPI::Blob>>()) {
// FIXME: "set stream to the result of running object’s get stream"
(void)blob_handle;
stream = realm.heap().allocate<Streams::ReadableStream>(realm, realm);
stream = TRY(blob_handle->cell()->get_stream());
}
// 4. Otherwise, set stream to a new ReadableStream object, and set up stream.
// 4. Otherwise, set stream to a new ReadableStream object, and set up stream with byte reading support.
else {
// FIXME: "set up stream"
stream = realm.heap().allocate<Streams::ReadableStream>(realm, realm);
TRY(Streams::set_up_readable_stream_controller_with_byte_reading_support(*stream));
}
// 5. Assert: stream is a ReadableStream object.