code.gitea.io/gitea@v1.22.3/modules/charset/charset_test.go (about) 1 // Copyright 2019 The Gitea Authors. All rights reserved. 2 // SPDX-License-Identifier: MIT 3 4 package charset 5 6 import ( 7 "bytes" 8 "io" 9 "strings" 10 "testing" 11 12 "code.gitea.io/gitea/modules/setting" 13 14 "github.com/stretchr/testify/assert" 15 ) 16 17 func resetDefaultCharsetsOrder() { 18 defaultDetectedCharsetsOrder := make([]string, 0, len(setting.Repository.DetectedCharsetsOrder)) 19 for _, charset := range setting.Repository.DetectedCharsetsOrder { 20 defaultDetectedCharsetsOrder = append(defaultDetectedCharsetsOrder, strings.ToLower(strings.TrimSpace(charset))) 21 } 22 setting.Repository.DetectedCharsetScore = map[string]int{} 23 i := 0 24 for _, charset := range defaultDetectedCharsetsOrder { 25 canonicalCharset := strings.ToLower(strings.TrimSpace(charset)) 26 if _, has := setting.Repository.DetectedCharsetScore[canonicalCharset]; !has { 27 setting.Repository.DetectedCharsetScore[canonicalCharset] = i 28 i++ 29 } 30 } 31 } 32 33 func TestMaybeRemoveBOM(t *testing.T) { 34 res := MaybeRemoveBOM([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 35 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) 36 37 res = MaybeRemoveBOM([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 38 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) 39 } 40 41 func TestToUTF8(t *testing.T) { 42 resetDefaultCharsetsOrder() 43 var res string 44 var err error 45 46 // Note: golang compiler seems so behave differently depending on the current 47 // locale, so some conversions might behave differently. For that reason, we don't 48 // depend on particular conversions but in expected behaviors. 49 50 res, err = ToUTF8([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) 51 assert.NoError(t, err) 52 assert.Equal(t, "ABC", res) 53 54 // "áéíóú" 55 res, err = ToUTF8([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 56 assert.NoError(t, err) 57 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res)) 58 59 // "áéíóú" 60 res, err = ToUTF8([]byte{ 61 0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 62 0xc3, 0xba, 63 }, ConvertOpts{}) 64 assert.NoError(t, err) 65 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res)) 66 67 res, err = ToUTF8([]byte{ 68 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 69 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, 70 }, ConvertOpts{}) 71 assert.NoError(t, err) 72 stringMustStartWith(t, "Hola,", res) 73 stringMustEndWith(t, "AAA.", res) 74 75 res, err = ToUTF8([]byte{ 76 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 77 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, 78 }, ConvertOpts{}) 79 assert.NoError(t, err) 80 stringMustStartWith(t, "Hola,", res) 81 stringMustEndWith(t, "AAA.", res) 82 83 res, err = ToUTF8([]byte{ 84 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 85 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, 86 }, ConvertOpts{}) 87 assert.NoError(t, err) 88 stringMustStartWith(t, "Hola,", res) 89 stringMustEndWith(t, "AAA.", res) 90 91 // Japanese (Shift-JIS) 92 // 日属秘ぞしちゅ。 93 res, err = ToUTF8([]byte{ 94 0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 95 0xBF, 0x82, 0xE3, 0x81, 0x42, 96 }, ConvertOpts{}) 97 assert.NoError(t, err) 98 assert.Equal(t, []byte{ 99 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, 100 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, 101 }, 102 []byte(res)) 103 104 res, err = ToUTF8([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) 105 assert.NoError(t, err) 106 assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, []byte(res)) 107 } 108 109 func TestToUTF8WithFallback(t *testing.T) { 110 resetDefaultCharsetsOrder() 111 // "ABC" 112 res := ToUTF8WithFallback([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) 113 assert.Equal(t, []byte{0x41, 0x42, 0x43}, res) 114 115 // "áéíóú" 116 res = ToUTF8WithFallback([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 117 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) 118 119 // UTF8 BOM + "áéíóú" 120 res = ToUTF8WithFallback([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 121 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) 122 123 // "Hola, así cómo ños" 124 res = ToUTF8WithFallback([]byte{ 125 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 126 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, 127 }, ConvertOpts{}) 128 assert.Equal(t, []byte{ 129 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 130 0xC3, 0xB3, 0x6D, 0x6F, 0x20, 0xC3, 0xB1, 0x6F, 0x73, 131 }, res) 132 133 // "Hola, así cómo " 134 minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20} 135 136 res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73}, ConvertOpts{}) 137 // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those 138 assert.Equal(t, minmatch, res[0:len(minmatch)]) 139 140 res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73}, ConvertOpts{}) 141 // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those 142 assert.Equal(t, minmatch, res[0:len(minmatch)]) 143 144 // Japanese (Shift-JIS) 145 // "日属秘ぞしちゅ。" 146 res = ToUTF8WithFallback([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42}, ConvertOpts{}) 147 assert.Equal(t, []byte{ 148 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, 149 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, 150 }, res) 151 152 res = ToUTF8WithFallback([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) 153 assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res) 154 } 155 156 func TestToUTF8DropErrors(t *testing.T) { 157 resetDefaultCharsetsOrder() 158 // "ABC" 159 res := ToUTF8DropErrors([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) 160 assert.Equal(t, []byte{0x41, 0x42, 0x43}, res) 161 162 // "áéíóú" 163 res = ToUTF8DropErrors([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 164 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) 165 166 // UTF8 BOM + "áéíóú" 167 res = ToUTF8DropErrors([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) 168 assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) 169 170 // "Hola, así cómo ños" 171 res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73}, ConvertOpts{}) 172 assert.Equal(t, []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73}, res[:8]) 173 assert.Equal(t, []byte{0x73}, res[len(res)-1:]) 174 175 // "Hola, así cómo " 176 minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20} 177 178 res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73}, ConvertOpts{}) 179 // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those 180 assert.Equal(t, minmatch, res[0:len(minmatch)]) 181 182 res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73}, ConvertOpts{}) 183 // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those 184 assert.Equal(t, minmatch, res[0:len(minmatch)]) 185 186 // Japanese (Shift-JIS) 187 // "日属秘ぞしちゅ。" 188 res = ToUTF8DropErrors([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42}, ConvertOpts{}) 189 assert.Equal(t, []byte{ 190 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, 191 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, 192 }, res) 193 194 res = ToUTF8DropErrors([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) 195 assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res) 196 } 197 198 func TestDetectEncoding(t *testing.T) { 199 resetDefaultCharsetsOrder() 200 testSuccess := func(b []byte, expected string) { 201 encoding, err := DetectEncoding(b) 202 assert.NoError(t, err) 203 assert.Equal(t, expected, encoding) 204 } 205 // utf-8 206 b := []byte("just some ascii") 207 testSuccess(b, "UTF-8") 208 209 // utf-8-sig: "hey" (with BOM) 210 b = []byte{0xef, 0xbb, 0xbf, 0x68, 0x65, 0x79} 211 testSuccess(b, "UTF-8") 212 213 // utf-16: "hey<accented G>" 214 b = []byte{0xff, 0xfe, 0x68, 0x00, 0x65, 0x00, 0x79, 0x00, 0xf4, 0x01} 215 testSuccess(b, "UTF-16LE") 216 217 // iso-8859-1: d<accented e>cor<newline> 218 b = []byte{0x44, 0xe9, 0x63, 0x6f, 0x72, 0x0a} 219 encoding, err := DetectEncoding(b) 220 assert.NoError(t, err) 221 assert.Contains(t, encoding, "ISO-8859-1") 222 223 old := setting.Repository.AnsiCharset 224 setting.Repository.AnsiCharset = "placeholder" 225 defer func() { 226 setting.Repository.AnsiCharset = old 227 }() 228 testSuccess(b, "placeholder") 229 230 // invalid bytes 231 b = []byte{0xfa} 232 _, err = DetectEncoding(b) 233 assert.Error(t, err) 234 } 235 236 func stringMustStartWith(t *testing.T, expected, value string) { 237 assert.Equal(t, expected, value[:len(expected)]) 238 } 239 240 func stringMustEndWith(t *testing.T, expected, value string) { 241 assert.Equal(t, expected, value[len(value)-len(expected):]) 242 } 243 244 func TestToUTF8WithFallbackReader(t *testing.T) { 245 resetDefaultCharsetsOrder() 246 247 for testLen := 0; testLen < 2048; testLen++ { 248 pattern := " test { () }\n" 249 input := "" 250 for len(input) < testLen { 251 input += pattern 252 } 253 input = input[:testLen] 254 input += "// Выключаем" 255 rd := ToUTF8WithFallbackReader(bytes.NewReader([]byte(input)), ConvertOpts{}) 256 r, _ := io.ReadAll(rd) 257 assert.EqualValuesf(t, input, string(r), "testing string len=%d", testLen) 258 } 259 260 truncatedOneByteExtension := failFastBytes 261 encoding, _ := DetectEncoding(truncatedOneByteExtension) 262 assert.Equal(t, "UTF-8", encoding) 263 264 truncatedTwoByteExtension := failFastBytes 265 truncatedTwoByteExtension[len(failFastBytes)-1] = 0x9b 266 truncatedTwoByteExtension[len(failFastBytes)-2] = 0xe2 267 268 encoding, _ = DetectEncoding(truncatedTwoByteExtension) 269 assert.Equal(t, "UTF-8", encoding) 270 271 truncatedThreeByteExtension := failFastBytes 272 truncatedThreeByteExtension[len(failFastBytes)-1] = 0x92 273 truncatedThreeByteExtension[len(failFastBytes)-2] = 0x9f 274 truncatedThreeByteExtension[len(failFastBytes)-3] = 0xf0 275 276 encoding, _ = DetectEncoding(truncatedThreeByteExtension) 277 assert.Equal(t, "UTF-8", encoding) 278 } 279 280 var failFastBytes = []byte{ 281 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2e, 0x74, 0x6f, 282 0x6f, 0x6c, 0x73, 0x2e, 0x61, 0x6e, 0x74, 0x2e, 0x74, 0x61, 0x73, 0x6b, 0x64, 0x65, 0x66, 0x73, 0x2e, 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