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	Change all license headers to comply with REUSE specification. Fix #16132 Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github> Co-authored-by: John Olheiser <john.olheiser@gmail.com>
		
			
				
	
	
		
			449 lines
		
	
	
	
		
			24 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			449 lines
		
	
	
	
		
			24 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
| // Copyright 2019 The Gitea Authors. All rights reserved.
 | |
| // SPDX-License-Identifier: MIT
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| 
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| package charset
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| 
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| import (
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| 	"bytes"
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| 	"io"
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| 	"strings"
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| 	"testing"
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| 
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| 	"code.gitea.io/gitea/modules/setting"
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| 
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| 	"github.com/stretchr/testify/assert"
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| )
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| 
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| func resetDefaultCharsetsOrder() {
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| 	defaultDetectedCharsetsOrder := make([]string, 0, len(setting.Repository.DetectedCharsetsOrder))
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| 	for _, charset := range setting.Repository.DetectedCharsetsOrder {
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| 		defaultDetectedCharsetsOrder = append(defaultDetectedCharsetsOrder, strings.ToLower(strings.TrimSpace(charset)))
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| 	}
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| 	setting.Repository.DetectedCharsetScore = map[string]int{}
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| 	i := 0
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| 	for _, charset := range defaultDetectedCharsetsOrder {
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| 		canonicalCharset := strings.ToLower(strings.TrimSpace(charset))
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| 		if _, has := setting.Repository.DetectedCharsetScore[canonicalCharset]; !has {
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| 			setting.Repository.DetectedCharsetScore[canonicalCharset] = i
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| 			i++
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| 		}
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| 	}
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| }
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| 
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| func TestRemoveBOMIfPresent(t *testing.T) {
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| 	res := RemoveBOMIfPresent([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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| 
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| 	res = RemoveBOMIfPresent([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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| }
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| 
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| func TestToUTF8WithErr(t *testing.T) {
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| 	resetDefaultCharsetsOrder()
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| 	var res string
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| 	var err error
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| 
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| 	// Note: golang compiler seems so behave differently depending on the current
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| 	// locale, so some conversions might behave differently. For that reason, we don't
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| 	// depend on particular conversions but in expected behaviors.
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| 
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| 	res, err = ToUTF8WithErr([]byte{0x41, 0x42, 0x43})
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| 	assert.NoError(t, err)
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| 	assert.Equal(t, "ABC", res)
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| 
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| 	// "áéíóú"
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| 	res, err = ToUTF8WithErr([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.NoError(t, err)
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res))
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| 
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| 	// "áéíóú"
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| 	res, err = ToUTF8WithErr([]byte{
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| 		0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3,
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| 		0xc3, 0xba,
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| 	})
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| 	assert.NoError(t, err)
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res))
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| 
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| 	res, err = ToUTF8WithErr([]byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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| 		0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e,
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| 	})
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| 	assert.NoError(t, err)
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| 	stringMustStartWith(t, "Hola,", res)
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| 	stringMustEndWith(t, "AAA.", res)
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| 
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| 	res, err = ToUTF8WithErr([]byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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| 		0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e,
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| 	})
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| 	assert.NoError(t, err)
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| 	stringMustStartWith(t, "Hola,", res)
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| 	stringMustEndWith(t, "AAA.", res)
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| 
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| 	res, err = ToUTF8WithErr([]byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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| 		0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73, 0x41, 0x41, 0x41, 0x2e,
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| 	})
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| 	assert.NoError(t, err)
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| 	stringMustStartWith(t, "Hola,", res)
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| 	stringMustEndWith(t, "AAA.", res)
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| 
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| 	// Japanese (Shift-JIS)
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| 	// 日属秘ぞしちゅ。
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| 	res, err = ToUTF8WithErr([]byte{
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| 		0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82,
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| 		0xBF, 0x82, 0xE3, 0x81, 0x42,
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| 	})
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| 	assert.NoError(t, err)
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| 	assert.Equal(t, []byte{
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| 		0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3,
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| 		0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82,
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| 	},
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| 		[]byte(res))
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| 
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| 	res, err = ToUTF8WithErr([]byte{0x00, 0x00, 0x00, 0x00})
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| 	assert.NoError(t, err)
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| 	assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, []byte(res))
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| }
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| 
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| func TestToUTF8WithFallback(t *testing.T) {
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| 	resetDefaultCharsetsOrder()
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| 	// "ABC"
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| 	res := ToUTF8WithFallback([]byte{0x41, 0x42, 0x43})
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| 	assert.Equal(t, []byte{0x41, 0x42, 0x43}, res)
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| 
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| 	// "áéíóú"
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| 	res = ToUTF8WithFallback([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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| 
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| 	// UTF8 BOM + "áéíóú"
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| 	res = ToUTF8WithFallback([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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| 
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| 	// "Hola, así cómo ños"
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| 	res = ToUTF8WithFallback([]byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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| 		0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73,
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| 	})
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| 	assert.Equal(t, []byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63,
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| 		0xC3, 0xB3, 0x6D, 0x6F, 0x20, 0xC3, 0xB1, 0x6F, 0x73,
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| 	}, res)
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| 
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| 	// "Hola, así cómo "
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| 	minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20}
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| 
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| 	res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73})
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| 	// Do not fail for differences in invalid cases, as the library might change the conversion criteria for those
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| 	assert.Equal(t, minmatch, res[0:len(minmatch)])
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| 
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| 	res = ToUTF8WithFallback([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73})
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| 	// Do not fail for differences in invalid cases, as the library might change the conversion criteria for those
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| 	assert.Equal(t, minmatch, res[0:len(minmatch)])
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| 
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| 	// Japanese (Shift-JIS)
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| 	// "日属秘ぞしちゅ。"
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| 	res = ToUTF8WithFallback([]byte{0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82, 0xBF, 0x82, 0xE3, 0x81, 0x42})
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| 	assert.Equal(t, []byte{
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| 		0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3,
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| 		0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82,
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| 	}, res)
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| 
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| 	res = ToUTF8WithFallback([]byte{0x00, 0x00, 0x00, 0x00})
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| 	assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res)
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| }
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| 
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| func TestToUTF8(t *testing.T) {
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| 	resetDefaultCharsetsOrder()
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| 	// Note: golang compiler seems so behave differently depending on the current
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| 	// locale, so some conversions might behave differently. For that reason, we don't
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| 	// depend on particular conversions but in expected behaviors.
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| 
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| 	res := ToUTF8(string([]byte{0x41, 0x42, 0x43}))
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| 	assert.Equal(t, "ABC", res)
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| 
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| 	// "áéíóú"
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| 	res = ToUTF8(string([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}))
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res))
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| 
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| 	// BOM + "áéíóú"
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| 	res = ToUTF8(string([]byte{
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| 		0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3,
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| 		0xc3, 0xba,
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| 	}))
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, []byte(res))
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| 
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| 	// Latin1
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| 	// Hola, así cómo ños
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| 	res = ToUTF8(string([]byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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| 		0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73,
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| 	}))
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| 	assert.Equal(t, []byte{
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| 		0x48, 0x6f, 0x6c, 0x61, 0x2c, 0x20, 0x61, 0x73, 0xc3, 0xad, 0x20, 0x63,
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| 		0xc3, 0xb3, 0x6d, 0x6f, 0x20, 0xc3, 0xb1, 0x6f, 0x73,
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| 	}, []byte(res))
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| 
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| 	// Latin1
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| 	// Hola, así cómo \x07ños
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| 	res = ToUTF8(string([]byte{
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| 		0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63,
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| 		0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73,
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| 	}))
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| 	// Hola,
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| 	bytesMustStartWith(t, []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C}, []byte(res))
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| 
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| 	// This test FAILS
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| 	// res = ToUTF8("Hola, así cómo \x81ños")
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| 	// Do not fail for differences in invalid cases, as the library might change the conversion criteria for those
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| 	// assert.Regexp(t, "^Hola, así cómo", res)
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| 
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| 	// Japanese (Shift-JIS)
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| 	// 日属秘ぞしちゅ。
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| 	res = ToUTF8(string([]byte{
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| 		0x93, 0xFA, 0x91, 0xAE, 0x94, 0xE9, 0x82, 0xBC, 0x82, 0xB5, 0x82,
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| 		0xBF, 0x82, 0xE3, 0x81, 0x42,
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| 	}))
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| 	assert.Equal(t, []byte{
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| 		0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3,
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| 		0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82,
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| 	},
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| 		[]byte(res))
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| 
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| 	res = ToUTF8("\x00\x00\x00\x00")
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| 	assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, []byte(res))
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| }
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| 
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| func TestToUTF8DropErrors(t *testing.T) {
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| 	resetDefaultCharsetsOrder()
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| 	// "ABC"
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| 	res := ToUTF8DropErrors([]byte{0x41, 0x42, 0x43})
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| 	assert.Equal(t, []byte{0x41, 0x42, 0x43}, res)
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| 
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| 	// "áéíóú"
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| 	res = ToUTF8DropErrors([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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| 
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| 	// UTF8 BOM + "áéíóú"
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| 	res = ToUTF8DropErrors([]byte{0xef, 0xbb, 0xbf, 0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba})
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| 	assert.Equal(t, []byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, res)
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| 
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| 	// "Hola, así cómo ños"
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| 	res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0xF1, 0x6F, 0x73})
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| 	assert.Equal(t, []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73}, res[:8])
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| 	assert.Equal(t, []byte{0x73}, res[len(res)-1:])
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| 
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| 	// "Hola, así cómo "
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| 	minmatch := []byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xC3, 0xAD, 0x20, 0x63, 0xC3, 0xB3, 0x6D, 0x6F, 0x20}
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| 
 | |
| 	res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x07, 0xA4, 0x6F, 0x73})
 | |
| 	// Do not fail for differences in invalid cases, as the library might change the conversion criteria for those
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| 	assert.Equal(t, minmatch, res[0:len(minmatch)])
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| 
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| 	res = ToUTF8DropErrors([]byte{0x48, 0x6F, 0x6C, 0x61, 0x2C, 0x20, 0x61, 0x73, 0xED, 0x20, 0x63, 0xF3, 0x6D, 0x6F, 0x20, 0x81, 0xA4, 0x6F, 0x73})
 | |
| 	// Do not fail for differences in invalid cases, as the library might change the conversion criteria for those
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| 	assert.Equal(t, minmatch, res[0:len(minmatch)])
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| 
 | |
| 	// Japanese (Shift-JIS)
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| 	// "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})
 | |
| 	assert.Equal(t, []byte{
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| 		0xE6, 0x97, 0xA5, 0xE5, 0xB1, 0x9E, 0xE7, 0xA7, 0x98, 0xE3,
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| 		0x81, 0x9E, 0xE3, 0x81, 0x97, 0xE3, 0x81, 0xA1, 0xE3, 0x82, 0x85, 0xE3, 0x80, 0x82,
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| 	}, res)
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| 
 | |
| 	res = ToUTF8DropErrors([]byte{0x00, 0x00, 0x00, 0x00})
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| 	assert.Equal(t, []byte{0x00, 0x00, 0x00, 0x00}, res)
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| }
 | |
| 
 | |
| func TestDetectEncoding(t *testing.T) {
 | |
| 	resetDefaultCharsetsOrder()
 | |
| 	testSuccess := func(b []byte, expected string) {
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| 		encoding, err := DetectEncoding(b)
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| 		assert.NoError(t, err)
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| 		assert.Equal(t, expected, encoding)
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| 	}
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| 	// utf-8
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| 	b := []byte("just some ascii")
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| 	testSuccess(b, "UTF-8")
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| 
 | |
| 	// utf-8-sig: "hey" (with BOM)
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| 	b = []byte{0xef, 0xbb, 0xbf, 0x68, 0x65, 0x79}
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| 	testSuccess(b, "UTF-8")
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| 
 | |
| 	// utf-16: "hey<accented G>"
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| 	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() {
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| 		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 bytesMustStartWith(t *testing.T, expected, value []byte) {
 | |
| 	assert.Equal(t, expected, 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)))
 | |
| 		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{
 | |
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