d91d6ee205
This patch implements the File API spec's supplemental steps for document's "unloading document cleanup steps" so that we now remove blob URLs associated with the document's relevant settings object when the document is being unloaded. Fixes two realm leaks when running our test suite.
109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
/*
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* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
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* Copyright (c) 2024, Andreas Kling <kling@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/StringBuilder.h>
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#include <LibURL/URL.h>
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#include <LibWeb/Crypto/Crypto.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/FileAPI/Blob.h>
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#include <LibWeb/FileAPI/BlobURLStore.h>
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#include <LibWeb/HTML/Origin.h>
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#include <LibWeb/HTML/Scripting/Environments.h>
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namespace Web::FileAPI {
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BlobURLStore& blob_url_store()
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{
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static HashMap<String, BlobURLEntry> store;
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return store;
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}
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// https://w3c.github.io/FileAPI/#unicodeBlobURL
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ErrorOr<String> generate_new_blob_url()
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{
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// 1. Let result be the empty string.
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StringBuilder result;
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// 2. Append the string "blob:" to result.
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TRY(result.try_append("blob:"sv));
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// 3. Let settings be the current settings object
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auto& settings = HTML::current_settings_object();
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// 4. Let origin be settings’s origin.
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auto origin = settings.origin();
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// 5. Let serialized be the ASCII serialization of origin.
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auto serialized = origin.serialize();
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// 6. If serialized is "null", set it to an implementation-defined value.
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if (serialized == "null"sv)
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serialized = "ladybird"sv;
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// 7. Append serialized to result.
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TRY(result.try_append(serialized));
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// 8. Append U+0024 SOLIDUS (/) to result.
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TRY(result.try_append('/'));
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// 9. Generate a UUID [RFC4122] as a string and append it to result.
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auto uuid = TRY(Crypto::generate_random_uuid());
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TRY(result.try_append(uuid));
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// 10. Return result.
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return result.to_string();
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}
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// https://w3c.github.io/FileAPI/#add-an-entry
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ErrorOr<String> add_entry_to_blob_url_store(JS::NonnullGCPtr<Blob> object)
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{
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// 1. Let store be the user agent’s blob URL store.
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auto& store = blob_url_store();
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// 2. Let url be the result of generating a new blob URL.
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auto url = TRY(generate_new_blob_url());
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// 3. Let entry be a new blob URL entry consisting of object and the current settings object.
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BlobURLEntry entry { object, HTML::current_settings_object() };
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// 4. Set store[url] to entry.
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TRY(store.try_set(url, move(entry)));
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// 5. Return url.
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return url;
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}
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// https://w3c.github.io/FileAPI/#removeTheEntry
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ErrorOr<void> remove_entry_from_blob_url_store(StringView url)
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{
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// 1. Let store be the user agent’s blob URL store;
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auto& store = blob_url_store();
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// 2. Let url string be the result of serializing url.
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auto url_string = TRY(URL::URL { url }.to_string());
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// 3. Remove store[url string].
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store.remove(url_string);
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return {};
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}
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// https://w3c.github.io/FileAPI/#lifeTime
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void run_unloading_cleanup_steps(JS::NonnullGCPtr<DOM::Document> document)
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{
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// 1. Let environment be the Document's relevant settings object.
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auto& environment = document->relevant_settings_object();
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// 2. Let store be the user agent’s blob URL store;
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auto& store = FileAPI::blob_url_store();
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// 3. Remove from store any entries for which the value's environment is equal to environment.
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store.remove_all_matching([&](auto&, auto& value) {
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return value.environment == &environment;
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});
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}
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}
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