Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 385 insertions, 0 deletions

diff --git a/modules/charset/charset_test.go b/modules/charset/charset_test.go
new file mode 100644
index 0000000..42c8415
--- /dev/null
+++ b/modules/charset/charset_test.go
@@ -0,0 +1,385 @@
+// 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"
+	"github.com/stretchr/testify/require"
+)
+
+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{})
+	require.NoError(t, err)
+	assert.Equal(t, "ABC", res)
+
+	// "áéíóú"
+	res, err = ToUTF8([]byte{0xc3, 0xa1, 0xc3, 0xa9, 0xc3, 0xad, 0xc3, 0xb3, 0xc3, 0xba}, ConvertOpts{})
+	require.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{})
+	require.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{})
+	require.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{})
+	require.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{})
+	require.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{})
+	require.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{})
+	require.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)
+		require.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)
+	require.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)
+	require.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, 0x74, 0x6f,
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+	0x64, 0x69, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x4f, 0x73, 0x0a, 0x69, 0x6d, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x6f, 0x72, 0x67,
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