// Copyright 2019 The Gitea Authors. All rights reserved. // SPDX-License-Identifier: MIT package charset import ( "bytes" "io" "strings" "testing" "code.gitea.io/gitea/modules/setting" "github.com/stretchr/testify/assert" ) func resetDefaultCharsetsOrder() { defaultDetectedCharsetsOrder := make([]string, 0, len(setting.Repository.DetectedCharsetsOrder)) for _, charset := range setting.Repository.DetectedCharsetsOrder { defaultDetectedCharsetsOrder = append(defaultDetectedCharsetsOrder, strings.ToLower(strings.TrimSpace(charset))) } setting.Repository.DetectedCharsetScore = map[string]int{} i := 0 for _, charset := range defaultDetectedCharsetsOrder { canonicalCharset := strings.ToLower(strings.TrimSpace(charset)) if _, has := setting.Repository.DetectedCharsetScore[canonicalCharset]; !has { setting.Repository.DetectedCharsetScore[canonicalCharset] = i i++ } } } func TestMaybeRemoveBOM(t *testing.T) { res := MaybeRemoveBOM([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) res = MaybeRemoveBOM([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) } func TestToUTF8(t *testing.T) { resetDefaultCharsetsOrder() var res string var err error // Note: golang compiler seems so behave differently depending on the current // locale, so some conversions might behave differently. For that reason, we don't // depend on particular conversions but in expected behaviors. res, err = ToUTF8([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) assert.NoError(t, err) assert.Equal(t, "ABC", res) // "áéíóú" res, err = ToUTF8([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.NoError(t, err) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res)) // "áéíóú" res, err = ToUTF8([]byte{ 0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba, }, ConvertOpts{}) assert.NoError(t, err) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res)) res, err = ToUTF8([]byte{ 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, }, ConvertOpts{}) assert.NoError(t, err) stringMustStartWith(t, "Hola,", res) stringMustEndWith(t, "AAA.", res) res, err = ToUTF8([]byte{ 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, }, ConvertOpts{}) assert.NoError(t, err) stringMustStartWith(t, "Hola,", res) stringMustEndWith(t, "AAA.", res) res, err = ToUTF8([]byte{ 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e, }, ConvertOpts{}) assert.NoError(t, err) stringMustStartWith(t, "Hola,", res) stringMustEndWith(t, "AAA.", res) // Japanese (Shift-JIS) // 日属秘ぞしちゅ。 res, err = ToUTF8([]byte{ 0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42, }, ConvertOpts{}) assert.NoError(t, err) assert.Equal(t, []byte{ 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, }, []byte(res)) res, err = ToUTF8([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) assert.NoError(t, err) assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, []byte(res)) } func TestToUTF8WithFallback(t *testing.T) { resetDefaultCharsetsOrder() // "ABC" res := ToUTF8WithFallback([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) assert.Equal(t, []byte{0x41, 0x42, 0x43}, res) // "áéíóú" res = ToUTF8WithFallback([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) // UTF8 BOM + "áéíóú" res = ToUTF8WithFallback([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) // "Hola, así cómo ños" res = ToUTF8WithFallback([]byte{ 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, }, ConvertOpts{}) assert.Equal(t, []byte{ 0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20, 0xC3, 0xB1, 0x6F, 0x73, }, res) // "Hola, así cómo " minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20} res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73}, ConvertOpts{}) // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those assert.Equal(t, minmatch, res[0:len(minmatch)]) res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73}, ConvertOpts{}) // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those assert.Equal(t, minmatch, res[0:len(minmatch)]) // Japanese (Shift-JIS) // "日属秘ぞしちゅ。" res = ToUTF8WithFallback([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42}, ConvertOpts{}) assert.Equal(t, []byte{ 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, }, res) res = ToUTF8WithFallback([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res) } func TestToUTF8DropErrors(t *testing.T) { resetDefaultCharsetsOrder() // "ABC" res := ToUTF8DropErrors([]byte{0x41, 0x42, 0x43}, ConvertOpts{}) assert.Equal(t, []byte{0x41, 0x42, 0x43}, res) // "áéíóú" res = ToUTF8DropErrors([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) // UTF8 BOM + "áéíóú" res = ToUTF8DropErrors([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{}) assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res) // "Hola, así cómo ños" res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73}, ConvertOpts{}) assert.Equal(t, []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73}, res[:8]) assert.Equal(t, []byte{0x73}, res[len(res)-1:]) // "Hola, así cómo " minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20} res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73}, ConvertOpts{}) // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those assert.Equal(t, minmatch, res[0:len(minmatch)]) res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73}, ConvertOpts{}) // Do not fail for differences in invalid cases, as the library might change the conversion criteria for those assert.Equal(t, minmatch, res[0:len(minmatch)]) // Japanese (Shift-JIS) // "日属秘ぞしちゅ。" res = ToUTF8DropErrors([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42}, ConvertOpts{}) assert.Equal(t, []byte{ 0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3, 0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82, }, res) res = ToUTF8DropErrors([]byte{0x00, 0x00, 0x00, 0x00}, ConvertOpts{}) assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res) } func TestDetectEncoding(t *testing.T) { resetDefaultCharsetsOrder() testSuccess := func(b []byte, expected string) { encoding, err := DetectEncoding(b) assert.NoError(t, err) assert.Equal(t, expected, encoding) } // utf-8 b := []byte("just some ascii") testSuccess(b, "UTF-8") // utf-8-sig: "hey" (with BOM) b = []byte{0xef, 0xbb, 0xbf, 0x68, 0x65, 0x79} testSuccess(b, "UTF-8") // utf-16: "hey<accented G>" b = []byte{0xff, 0xfe, 0x68, 0x00, 0x65, 0x00, 0x79, 0x00, 0xf4, 0x01} testSuccess(b, "UTF-16LE") // iso-8859-1: d<accented e>cor<newline> b = []byte{0x44, 0xe9, 0x63, 0x6f, 0x72, 0x0a} encoding, err := DetectEncoding(b) assert.NoError(t, err) assert.Contains(t, encoding, "ISO-8859-1") old := setting.Repository.AnsiCharset setting.Repository.AnsiCharset = "placeholder" defer func() { setting.Repository.AnsiCharset = old }() testSuccess(b, "placeholder") // invalid bytes b = []byte{0xfa} _, err = DetectEncoding(b) assert.Error(t, err) } func stringMustStartWith(t *testing.T, expected, value string) { assert.Equal(t, expected, value[:len(expected)]) } func stringMustEndWith(t *testing.T, expected, value string) { assert.Equal(t, expected, value[len(value)-len(expected):]) } func TestToUTF8WithFallbackReader(t *testing.T) { resetDefaultCharsetsOrder() for testLen := 0; testLen < 2048; testLen++ { pattern := " test { () }\n" input := "" for len(input) < testLen { input += pattern } input = input[:testLen] input += "// Выключаем" rd := ToUTF8WithFallbackReader(bytes.NewReader([]byte(input)), ConvertOpts{}) r, _ := io.ReadAll(rd) assert.EqualValuesf(t, input, string(r), "testing string len=%d", testLen) } truncatedOneByteExtension := failFastBytes encoding, _ := DetectEncoding(truncatedOneByteExtension) assert.Equal(t, "UTF-8", encoding) truncatedTwoByteExtension := failFastBytes truncatedTwoByteExtension[len(failFastBytes)-1] = 0x9b truncatedTwoByteExtension[len(failFastBytes)-2] = 0xe2 encoding, _ = DetectEncoding(truncatedTwoByteExtension) assert.Equal(t, "UTF-8", encoding) truncatedThreeByteExtension := failFastBytes truncatedThreeByteExtension[len(failFastBytes)-1] = 0x92 truncatedThreeByteExtension[len(failFastBytes)-2] = 0x9f truncatedThreeByteExtension[len(failFastBytes)-3] = 0xf0 encoding, _ = DetectEncoding(truncatedThreeByteExtension) assert.Equal(t, "UTF-8", encoding) } var failFastBytes = []byte{ 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2e, 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