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LibWeb/MimeSniff: Add sniffing in an image context
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parent
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commit
02ea85da2c
3 changed files with 100 additions and 7 deletions
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@ -14,6 +14,15 @@ TEST_CASE(determine_computed_mime_type_given_no_sniff_is_set)
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auto computed_mime_type = MUST(Web::MimeSniff::Resource::sniff("\x00"sv.bytes(), Web::MimeSniff::SniffingConfiguration { .supplied_type = mime_type, .no_sniff = true }));
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EXPECT_EQ("text/html"sv, MUST(computed_mime_type.serialized()));
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// Cover the edge case in the context-specific sniffing algorithm.
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computed_mime_type = MUST(Web::MimeSniff::Resource::sniff("\x00"sv.bytes(), Web::MimeSniff::SniffingConfiguration {
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.sniffing_context = Web::MimeSniff::SniffingContext::Image,
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.supplied_type = mime_type,
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.no_sniff = true,
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}));
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EXPECT_EQ("text/html"sv, MUST(computed_mime_type.serialized()));
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}
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TEST_CASE(determine_computed_mime_type_given_no_sniff_is_unset)
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@ -31,6 +40,16 @@ TEST_CASE(determine_computed_mime_type_given_no_sniff_is_unset)
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EXPECT_EQ(xml_mime_type, MUST(computed_mime_type.serialized()));
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}
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static void set_image_type_mappings(HashMap<StringView, Vector<StringView>>& mime_type_to_headers_map)
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{
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mime_type_to_headers_map.set("image/x-icon"sv, { "\x00\x00\x01\x00"sv, "\x00\x00\x02\x00"sv });
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mime_type_to_headers_map.set("image/bmp"sv, { "BM"sv });
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mime_type_to_headers_map.set("image/gif"sv, { "GIF87a"sv, "GIF89a"sv });
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mime_type_to_headers_map.set("image/webp"sv, { "RIFF\x00\x00\x00\x00WEBPVP"sv });
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mime_type_to_headers_map.set("image/png"sv, { "\x89PNG\x0D\x0A\x1A\x0A"sv });
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mime_type_to_headers_map.set("image/jpeg"sv, { "\xFF\xD8\xFF"sv });
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}
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TEST_CASE(determine_computed_mime_type_in_both_none_and_browsing_sniffing_context)
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{
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HashMap<StringView, Vector<StringView>> mime_type_to_headers_map;
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@ -64,12 +83,9 @@ TEST_CASE(determine_computed_mime_type_in_both_none_and_browsing_sniffing_contex
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"\xEF\xBB\xBF\x00"sv,
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"Hello world!"sv,
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});
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mime_type_to_headers_map.set("image/x-icon"sv, { "\x00\x00\x01\x00"sv, "\x00\x00\x02\x00"sv });
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mime_type_to_headers_map.set("image/bmp"sv, { "BM"sv });
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mime_type_to_headers_map.set("image/gif"sv, { "GIF87a"sv, "GIF89a"sv });
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mime_type_to_headers_map.set("image/webp"sv, { "RIFF\x00\x00\x00\x00WEBPVP"sv });
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mime_type_to_headers_map.set("image/png"sv, { "\x89PNG\x0D\x0A\x1A\x0A"sv });
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mime_type_to_headers_map.set("image/jpeg"sv, { "\xFF\xD8\xFF"sv });
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set_image_type_mappings(mime_type_to_headers_map);
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mime_type_to_headers_map.set("audio/aiff"sv, { "FORM\x00\x00\x00\x00\x41IFF"sv });
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mime_type_to_headers_map.set("audio/mpeg"sv, { "ID3"sv });
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mime_type_to_headers_map.set("application/ogg"sv, { "OggS\x00"sv });
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@ -110,3 +126,36 @@ TEST_CASE(compute_mime_type_given_unknown_supplied_type)
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EXPECT_EQ("text/html"sv, computed_mime_type.essence());
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}
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}
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TEST_CASE(determine_computed_mime_type_in_image_sniffing_context)
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{
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// Cover case where supplied type is an XML MIME type.
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auto mime_type = "application/rss+xml"sv;
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auto supplied_type = MUST(Web::MimeSniff::MimeType::parse(mime_type)).release_value();
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auto computed_mime_type = MUST(Web::MimeSniff::Resource::sniff(""sv.bytes(), Web::MimeSniff::SniffingConfiguration { .sniffing_context = Web::MimeSniff::SniffingContext::Image, .supplied_type = supplied_type }));
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EXPECT_EQ(mime_type, MUST(computed_mime_type.serialized()));
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HashMap<StringView, Vector<StringView>> mime_type_to_headers_map;
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set_image_type_mappings(mime_type_to_headers_map);
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// Also consider a resource that is not an image.
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mime_type_to_headers_map.set("application/octet-stream"sv, { "\x00"sv });
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for (auto const& mime_type_to_headers : mime_type_to_headers_map) {
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mime_type = mime_type_to_headers.key;
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for (auto const& header : mime_type_to_headers.value) {
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computed_mime_type = MUST(Web::MimeSniff::Resource::sniff(header.bytes(), Web::MimeSniff::SniffingConfiguration { .sniffing_context = Web::MimeSniff::SniffingContext::Image }));
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EXPECT_EQ(mime_type, computed_mime_type.essence());
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}
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}
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// Cover case where we aren't dealing with an image MIME type.
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mime_type = "text/html"sv;
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supplied_type = MUST(Web::MimeSniff::MimeType::parse("text/html"sv)).release_value();
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computed_mime_type = MUST(Web::MimeSniff::Resource::sniff(""sv.bytes(), Web::MimeSniff::SniffingConfiguration { .sniffing_context = Web::MimeSniff::SniffingContext::Image, .supplied_type = supplied_type }));
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EXPECT_EQ(mime_type, computed_mime_type.essence());
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}
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