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LibWeb/MimeSniff: Implement MP4 signature matching

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Kemal Zebari 2024-01-08 01:36:33 -08:00 • committed by Andrew Kaster
parent 90ff6cca8a
commit 3aaa1c1df7
2 changed files with 86 additions and 3 deletions
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35
Tests/LibWeb/TestMimeSniff.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2023, Kemal Zebari <kemalzebra@gmail.com>.
* Copyright (c) 2023-2024, Kemal Zebari <kemalzebra@gmail.com>.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -247,6 +247,39 @@ TEST_CASE(determine_computed_mime_type_in_audio_or_video_sniffing_context)
EXPECT_EQ(mime_type, computed_mime_type.essence());
}
TEST_CASE(determine_computed_mime_type_when_trying_to_match_mp4_signature)
{
HashMap<StringView, Vector<StringView>> mime_type_to_headers_map;
mime_type_to_headers_map.set("application/octet-stream"sv, {
// Payload length < 12.
"!= 12"sv,
// Payload length < box size.
"\x00\x00\x00\x1F\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A"sv,
// Box size % 4 != 0.
"\x00\x00\x00\x0D\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"sv,
// 4 bytes after box size header != "ftyp".
"\x00\x00\x00\x0C\x00\x00\x00\x00\x00\x00\x00\x00"sv,
// Sequence "mp4" couldn't be found in ftyp box.
"\x00\x00\x00\x18\x66\x74\x79\x70isom\x00\x00\x00\x00\x61\x76\x63\x31\x00\x00\x00\x00"sv,
});
mime_type_to_headers_map.set("video/mp4"sv, {
// 3 bytes after "ftyp" sequence == "mp4".
"\x00\x00\x00\x0C\x66\x74\x79\x70mp42"sv,
// "mp4" sequence found while executing while loop (this input covers entire loop)
"\x00\x00\x00\x18\x66\x74\x79\x70isom\x00\x00\x00\x00\x61\x76\x63\x31mp41"sv,
});
for (auto const& mime_type_to_headers : mime_type_to_headers_map) {
auto mime_type = mime_type_to_headers.key;
for (auto const& header : mime_type_to_headers.value) {
auto computed_mime_type = MUST(Web::MimeSniff::Resource::sniff(header.bytes(), Web::MimeSniff::SniffingConfiguration { .sniffing_context = Web::MimeSniff::SniffingContext::AudioOrVideo }));
EXPECT_EQ(mime_type, MUST(computed_mime_type.serialized()));
}
}
}
TEST_CASE(determine_computed_mime_type_in_a_font_context)
{
// Cover case where supplied type is an XML MIME type.