RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 14:18:12 +00:00
Code Issues Activity Actions

LibWeb: Move extract_mime_type() from XMLHttpRequest to HeaderList

Browse source 
Except some minor tweaks, this is a direct copy of Luke's initial
implementation in XMLHttpRequest, now replacing the former.
This commit is contained in:
Linus Groh 2022-07-20 17:47:29 +01:00
parent dfd62437c4
commit 042dfc7284
4 changed files with 63 additions and 60 deletions
Download patch file Download diff file Expand all files Collapse all files

59
Userland/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Headers.cpp
View file

@ -1,6 +1,7 @@
/*
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2022, Kenneth Myhra <kennethmyhra@serenityos.org>
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -252,6 +253,64 @@ ErrorOr<Vector<Header>> HeaderList::sort_and_combine() const
return headers;
}
// https://fetch.spec.whatwg.org/#concept-header-extract-mime-type
Optional<MimeSniff::MimeType> HeaderList::extract_mime_type() const
{
// 1. Let charset be null.
Optional<String> charset;
// 2. Let essence be null.
Optional<String> essence;
// 3. Let mimeType be null.
Optional<MimeSniff::MimeType> mime_type;
// 4. Let values be the result of getting, decoding, and splitting `Content-Type` from headers.
auto values_or_error = get_decode_and_split("Content-Type"sv.bytes());
if (values_or_error.is_error())
return {};
auto values = values_or_error.release_value();
// 5. If values is null, then return failure.
if (!values.has_value())
return {};
// 6. For each value of values:
for (auto const& value : *values) {
// 1. Let temporaryMimeType be the result of parsing value.
auto temporary_mime_type = MimeSniff::MimeType::from_string(value);
// 2. If temporaryMimeType is failure or its essence is "*/*", then continue.
if (!temporary_mime_type.has_value() || temporary_mime_type->essence() == "*/*"sv)
continue;
// 3. Set mimeType to temporaryMimeType.
mime_type = temporary_mime_type;
// 4. If mimeType’s essence is not essence, then:
if (mime_type->essence() != essence) {
// 1. Set charset to null.
charset = {};
// 2. If mimeType’s parameters["charset"] exists, then set charset to mimeType’s parameters["charset"].
auto charset_it = mime_type->parameters().find("charset"sv);
if (charset_it != mime_type->parameters().end())
charset = charset_it->value;
// 3. Set essence to mimeType’s essence.
essence = mime_type->essence();
}
// 5. Otherwise, if mimeType’s parameters["charset"] does not exist, and charset is non-null, set mimeType’s parameters["charset"] to charset.
else if (!mime_type->parameters().contains("charset"sv) && charset.has_value()) {
mime_type->set_parameter("charset"sv, charset.value());
}
}
// 7. If mimeType is null, then return failure.
// 8. Return mimeType.
return mime_type;
}
// https://fetch.spec.whatwg.org/#convert-header-names-to-a-sorted-lowercase-set
ErrorOr<OrderedHashTable<ByteBuffer>> convert_header_names_to_a_sorted_lowercase_set(Span<ReadonlyBytes> header_names)
{