mirror of
https://github.com/LadybirdBrowser/ladybird.git
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127 lines
3.8 KiB
C++
127 lines
3.8 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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* Copyright (c) 2024, Shannon Booth <shannon@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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// https://w3c.github.io/FileAPI/#blob-url-resolve
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Optional<BlobURLEntry> resolve_a_blob_url(URL::URL const& url)
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{
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// 1. Assert: url’s scheme is "blob".
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VERIFY(url.scheme() == "blob"sv);
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// 2. Let store be the user agent’s blob URL store.
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auto& store = blob_url_store();
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// 3. Let url string be the result of serializing url with the exclude fragment flag set.
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auto url_string = MUST(String::from_byte_string(url.serialize(URL::ExcludeFragment::Yes)));
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// 4. If store[url string] exists, return store[url string]; otherwise return failure.
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return store.get(url_string);
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}
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}
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