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libs/http/src/server/mime_db.cpp

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libs/http/src/server/mime_db.cpp
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1 //
2 // Copyright (c) 2025 Vinnie Falco (vinnie dot falco at gmail dot com)
3 //
4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // Official repository: https://github.com/cppalliance/http
8 //
9
10 #include <boost/http/server/mime_db.hpp>
11 #include <algorithm>
12 #include <cctype>
13
14 namespace boost {
15 namespace http {
16 namespace mime_db {
17
18 namespace {
19
20 // Static database of common MIME types
21 // Sorted by type for binary search
22 constexpr mime_type_entry db[] = {
23 { "application/gzip", "", false },
24 { "application/javascript", "UTF-8", true },
25 { "application/json", "UTF-8", true },
26 { "application/octet-stream", "", false },
27 { "application/pdf", "", false },
28 { "application/rtf", "UTF-8", true },
29 { "application/wasm", "", false },
30 { "application/x-7z-compressed", "", false },
31 { "application/x-bzip", "", false },
32 { "application/x-bzip2", "", false },
33 { "application/x-tar", "", false },
34 { "application/xhtml+xml", "UTF-8", true },
35 { "application/xml", "UTF-8", true },
36 { "application/zip", "", false },
37 { "audio/aac", "", false },
38 { "audio/flac", "", false },
39 { "audio/mp4", "", false },
40 { "audio/mpeg", "", false },
41 { "audio/ogg", "", false },
42 { "audio/wav", "", false },
43 { "audio/webm", "", false },
44 { "font/otf", "", false },
45 { "font/ttf", "", false },
46 { "font/woff", "", false },
47 { "font/woff2", "", false },
48 { "image/avif", "", false },
49 { "image/bmp", "", false },
50 { "image/gif", "", false },
51 { "image/jpeg", "", false },
52 { "image/png", "", false },
53 { "image/svg+xml", "UTF-8", true },
54 { "image/tiff", "", false },
55 { "image/webp", "", false },
56 { "image/x-icon", "", false },
57 { "text/cache-manifest", "UTF-8", true },
58 { "text/calendar", "UTF-8", true },
59 { "text/css", "UTF-8", true },
60 { "text/csv", "UTF-8", true },
61 { "text/html", "UTF-8", true },
62 { "text/javascript", "UTF-8", true },
63 { "text/markdown", "UTF-8", true },
64 { "text/plain", "UTF-8", true },
65 { "text/xml", "UTF-8", true },
66 { "video/mp4", "", false },
67 { "video/mpeg", "", false },
68 { "video/ogg", "", false },
69 { "video/webm", "", false },
70 };
71
72 constexpr std::size_t db_size = sizeof( db ) / sizeof( db[0] );
73
74 // Case-insensitive comparison
75 int
76 ✗ compare_icase( core::string_view a, core::string_view b ) noexcept
77 {
78 ✗ auto const n = ( std::min )( a.size(), b.size() );
79 ✗ for( std::size_t i = 0; i < n; ++i )
80 {
81 auto const ca = static_cast<unsigned char>(
82 ✗ std::tolower( static_cast<unsigned char>( a[i] ) ) );
83 auto const cb = static_cast<unsigned char>(
84 ✗ std::tolower( static_cast<unsigned char>( b[i] ) ) );
85 ✗ if( ca < cb )
86 ✗ return -1;
87 ✗ if( ca > cb )
88 ✗ return 1;
89 }
90 ✗ if( a.size() < b.size() )
91 ✗ return -1;
92 ✗ if( a.size() > b.size() )
93 ✗ return 1;
94 ✗ return 0;
95 }
96
97 } // (anon)
98
99 mime_type_entry const*
100 ✗ lookup( core::string_view type ) noexcept
101 {
102 // Binary search
103 ✗ std::size_t lo = 0;
104 ✗ std::size_t hi = db_size;
105 ✗ while( lo < hi )
106 {
107 ✗ auto const mid = lo + ( hi - lo ) / 2;
108 ✗ auto const cmp = compare_icase( db[mid].type, type );
109 ✗ if( cmp < 0 )
110 ✗ lo = mid + 1;
111 ✗ else if( cmp > 0 )
112 ✗ hi = mid;
113 else
114 ✗ return &db[mid];
115 }
116 ✗ return nullptr;
117 }
118
119 } // mime_db
120 } // http
121 } // boost
122