1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
|
package gomime
import (
"bytes"
//"fmt"
"strings"
"testing"
"golang.org/x/text/encoding/htmlindex"
)
func TestDecodeHeader(t *testing.T) {
testData := []struct{ raw, expected string }{
{
"",
"",
},
{
"=?iso-2022-jp?Q?=1B$B!Z=1B(BTimes_Car_PLUS=1B$B![JV5Q>Z=1B(B?=",
"【Times Car PLUS】返却証",
},
{
`=?iso-2022-jp?Q?iTunes_Movie_=1B$B%K%e!<%j%j!<%9$HCmL\:nIJ=1B(B?=`,
"iTunes Movie ニューリリースと注目作品",
},
{
"=?UTF-8?B?w4TDi8OPw5bDnA==?= =?UTF-8?B?IMOkw6vDr8O2w7w=?=",
"ÄËÏÖÜ äëïöü",
},
{
"=?ISO-8859-2?B?xMtJ1tw=?= =?ISO-8859-2?B?IOTrafb8?=",
"ÄËIÖÜ äëiöü",
},
{
"=?uknown?B?xMtJ1tw=?= =?ISO-8859-2?B?IOTrafb8?=",
"=?uknown?B?xMtJ1tw=?= =?ISO-8859-2?B?IOTrafb8?=",
},
}
for _, val := range testData {
if decoded, err := DecodeHeader(val.raw); strings.Compare(val.expected, decoded) != 0 {
t.Error("Incorrect decoding of header", val.raw, "expected", val.expected, "but have", decoded, "; Error", err)
} else {
// fmt.Println("Header", val.raw, "successfully decoded", decoded, ". Error", err)
}
}
}
func TestDecodeCharsetBoundaryInputs(t *testing.T) {
_, err := DecodeCharset([]byte("\xff"), "text/plain", map[string]string{"charset": "csKOI8R"})
if err != nil {
t.Error("Expected no error")
}
_, err = DecodeCharset([]byte("+000000000000000000000000 "), "text/plain", map[string]string{"charset": "utf7"})
if err != nil {
t.Error("Expected no error")
}
}
func TestGetEncoding(t *testing.T) {
// all MIME charset with aliases can be found here https://www.iana.org/assignments/character-sets/character-sets.xhtml
mimesets := map[string][]string{
"utf-8": []string{ // MIB 16
"utf8",
"csutf8",
"unicode-1-1-utf-8",
"iso-utf-8",
"utf8mb4",
},
"gbk": []string{
"gb2312", // MIB 2025
//"euc-cn": []string{
"euccn",
"ibm-euccn",
},
//"utf7": []string{"utf-7", "unicode-1-1-utf-7"},
"iso-8859-2": []string{ // MIB 5
"iso-ir-101",
"iso_8859-2",
"iso8859-2",
"latin2",
"l2",
"csisolatin2",
"ibm852",
//"FAILEDibm852",
},
"iso-8859-3": []string{ // MIB 6
"iso-ir-109",
"iso_8859-3",
"latin3",
"l3",
"csisolatin3",
},
"iso-8859-4": []string{ // MIB 7
"iso-ir-110",
"iso_8859-4",
"latin4",
"l4",
"csisolatin4",
},
"iso-8859-5": []string{ // MIB 8
"iso-ir-144",
"iso_8859-5",
"cyrillic",
"csisolatincyrillic",
},
"iso-8859-6": []string{ // MIB 9
"iso-ir-127",
"iso_8859-6",
"ecma-114",
"asmo-708",
"arabic",
"csisolatinarabic",
//"iso-8859-6e": []string{ // MIB 81 just direction
"csiso88596e",
"iso-8859-6-e",
//"iso-8859-6i": []string{ // MIB 82
"csiso88596i",
"iso-8859-6-i"},
"iso-8859-7": []string{ // MIB 10
"iso-ir-126",
"iso_8859-7",
"elot_928",
"ecma-118",
"greek",
"greek8",
"csisolatingreek"},
"iso-8859-8": []string{ // MIB 11
"iso-ir-138",
"iso_8859-8",
"hebrew",
"csisolatinhebrew",
//"iso-8859-8e": []string{ // MIB 84 (directionality
"csiso88598e",
"iso-8859-8-e",
},
"iso-8859-8-i": []string{ // MIB 85
"logical",
"csiso88598i",
"iso-8859-8-i", // Hebrew, the "i" means right-to-left, probably unnecessary with ISO cleaning above
},
"iso-8859-10": []string{ // MIB 13
"iso-ir-157",
"l6",
"iso_8859-10:1992",
"csisolatin6",
"latin6"},
"iso-8859-13": []string{ // MIB 109
"csiso885913"},
"iso-8859-14": []string{ // MIB 110
"iso-ir-199",
"iso_8859-14:1998",
"iso_8859-14",
"latin8",
"iso-celtic",
"l8",
"csiso885914"},
"iso-8859-15": []string{ // MIB 111
"iso_8859-15",
"latin-9",
"csiso885915",
"ISO8859-15"},
"iso-8859-16": []string{ // MIB 112
"iso-ir-226",
"iso_8859-16:2001",
"iso_8859-16",
"latin10",
"l10",
"csiso885916",
},
"windows-874": []string{ // MIB 2109
"cswindows874",
"cp874",
"iso-8859-11",
"tis-620",
},
"windows-1250": []string{ // MIB 2250
"cswindows1250",
"cp1250",
},
"windows-1251": []string{ // MIB 2251
"cswindows1251",
"cp1251",
},
"windows-1252": []string{ // MIB 2252
"cswindows1252",
"cp1252",
"3dwindows-1252",
"we8mswin1252",
"us-ascii", // MIB 3
"ansi_x3.110-1983", // MIB 74 // usascii
//"iso-8859-1": []string{ // MIB 4 succeed by win1252
"iso8859-1",
"iso-ir-100",
"iso_8859-1",
"latin1",
"l1",
"ibm819",
"cp819",
"csisolatin1",
"ansi_x3.4-1968",
"ansi_x3.4-1986",
"cp850",
"cp858", // "cp850" Mostly correct except for the Euro sign
"iso_646.irv:1991",
"iso646-us",
"us",
"ibm367",
"cp367",
"csascii",
"ascii",
"iso-ir-6",
"we8iso8859p1",
},
"windows-1253": []string{"cswindows1253", "cp1253"}, // MIB 2253
"windows-1254": []string{"cswindows1254", "cp1254"}, // MIB 2254
"windows-1255": []string{"cSwindows1255", "cp1255"}, // MIB 2255
"windows-1256": []string{"cswIndows1256", "cp1256"}, // MIB 2256
"windows-1257": []string{"cswinDows1257", "cp1257"}, // MIB 2257
"windows-1258": []string{"cswindoWs1258", "cp1258"}, // MIB 2257
"koi8-r": []string{"cskoi8r", "koi8r"}, // MIB 2084
"koi8-u": []string{"cskoi8u", "koi8u"}, // MIB 2088
"macintosh": []string{"mac", "macroman", "csmacintosh"}, // MIB 2027
"big5": []string{
"zht16mswin950", // cp950
"cp950",
},
"euc-kr": []string{
"euckr", // MIB 38
"ibm-euckr",
//"uhc": []string{ // Korea
"ks_c_5601-1987",
"ksc5601",
"cp949",
},
"euc-jp": []string{
"eucjp",
"ibm-eucjp",
},
"iso-2022-jp": []string{ // MIB 39
"iso2022jp",
"csiso2022jp",
},
}
for expected, names := range mimesets {
expenc, _ := htmlindex.Get(expected)
if canonical, err := htmlindex.Name(expenc); canonical != expected || err != nil {
t.Fatalf("Error while get canonical name. Expected '%v' but have %v `%#v`: %v", expected, canonical, expenc, err)
}
for _, name := range names {
enc, err := getEncoding(name)
if err != nil || enc == nil {
t.Errorf("Error while getting encoding for %v returned: '%#v' and error: '%v'", name, enc, err)
}
if expenc != enc {
t.Errorf("For %v expected %v '%v' but have '%v'", name, expected, expenc, enc)
}
}
}
}
// sample text for UTF8 http://www.columbia.edu/~fdc/utf8/index.html
func TestEncodeReader(t *testing.T) {
// define test data
testData := []struct {
params map[string]string
original []byte
message string
}{
// russian
{
map[string]string{"charset": "koi8-r"},
// а, з, б, у, к, а, а, б, в, г, д, е, ё
[]byte{0xC1, 0xDA, 0xC2, 0xD5, 0xCB, 0xC1, 0xC1, 0xC2, 0xD7, 0xC7, 0xC4, 0xC5, 0xA3},
"азбукаабвгдеё",
},
{
map[string]string{"charset": "KOI8-R"},
[]byte{0xC1, 0xDA, 0xC2, 0xD5, 0xCB, 0xC1, 0xC1, 0xC2, 0xD7, 0xC7, 0xC4, 0xC5, 0xA3},
"азбукаабвгдеё",
},
{
map[string]string{"charset": "csKOI8R"},
[]byte{0xC1, 0xDA, 0xC2, 0xD5, 0xCB, 0xC1, 0xC1, 0xC2, 0xD7, 0xC7, 0xC4, 0xC5, 0xA3},
"азбукаабвгдеё",
},
{
map[string]string{"charset": "koi8-u"},
[]byte{0xC1, 0xDA, 0xC2, 0xD5, 0xCB, 0xC1, 0xC1, 0xC2, 0xD7, 0xC7, 0xC4, 0xC5, 0xA3},
"азбукаабвгдеё",
},
{
map[string]string{"charset": "iso-8859-5"},
// а , з , б , у , к , а , а , б , в , г , д , е , ё
[]byte{0xD0, 0xD7, 0xD1, 0xE3, 0xDA, 0xD0, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xF1},
"азбукаабвгдеё",
},
{
map[string]string{"charset": "csWrong"},
[]byte{0xD0, 0xD7, 0xD1, 0xE3, 0xDA, 0xD0, 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6},
"",
},
{
map[string]string{"charset": "utf8"},
[]byte{0xD0, 0xB0, 0xD0, 0xB7, 0xD0, 0xB1, 0xD1, 0x83, 0xD0, 0xBA, 0xD0, 0xB0, 0xD0, 0xB0, 0xD0, 0xB1, 0xD0, 0xB2, 0xD0, 0xB3, 0xD0, 0xB4, 0xD0, 0xB5, 0xD1, 0x91},
"азбукаабвгдеё",
},
// czechoslovakia
{
map[string]string{"charset": "windows-1250"},
[]byte{225, 228, 232, 233, 236, 244},
"áäčéěô",
},
// umlauts
{
map[string]string{"charset": "iso-8859-1"},
[]byte{196, 203, 214, 220, 228, 235, 246, 252},
"ÄËÖÜäëöü",
},
// latvia
{
map[string]string{"charset": "iso-8859-4"},
[]byte{224, 239, 243, 182, 254},
"āīķļū",
},
{ // encoded by https://www.motobit.com/util/charset-codepage-conversion.asp
map[string]string{"charset": "utf7"},
[]byte("He wes Leovena+APA-es sone -- li+APA-e him be Drihten.+A6QDtw- +A7MDuwPOA8MDwwOx- +A7wDvwPF- +A60DtAPJA8MDsQO9- +A7UDuwO7A7cDvQO5A7oDrg-. +BCcENQRABD0ENQQ7BDg- +BDgENwQxBEs- +BDcENAQ1BEEETA- +BDg- +BEIEMAQ8-,+BCcENQRABD0ENQQ7BDg- +BDgENwQxBEs- +BDcENAQ1BEEETA- +BDg- +BEIEMAQ8-,+C68LvguuC7ELvwuoC80LpA- +C64Lygu0C78LlQuzC78LsgvH- +C6QLrgu/C7QLzQuuC8oLtAu/- +C6oLywuyC80- +C4cLqQu/C6QLvgu1C6QLwQ- +C44LmQvNC5ULwQuuC80- +C5ULvgujC8sLrgvN-."),
"He wes Leovenaðes sone -- liðe him be Drihten.Τη γλώσσα μου έδωσαν ελληνική. Чернели избы здесь и там,Чернели избы здесь и там,யாமறிந்த மொழிகளிலே தமிழ்மொழி போல் இனிதாவது எங்கும் காணோம்.",
},
// iconv -f UTF8 -t GB2312 utf8.txt | hexdump -v -e '"0x" 1/1 "%x, "'
{ // encoded by iconv; dump by `cat gb2312.txt | hexdump -v -e '"0x" 1/1 "%x "'` and reformat; text from https://zh.wikipedia.org/wiki/GB_2312
map[string]string{"charset": "GB2312"},
[]byte{0x47, 0x42, 0x20, 0x32, 0x33, 0x31, 0x32, 0xb5, 0xc4, 0xb3, 0xf6, 0xcf, 0xd6, 0xa3, 0xac, 0xbb, 0xf9, 0xb1, 0xbe, 0xc2, 0xfa, 0xd7, 0xe3, 0xc1, 0xcb, 0xba, 0xba, 0xd7, 0xd6, 0xb5, 0xc4, 0xbc, 0xc6, 0xcb, 0xe3, 0xbb, 0xfa, 0xb4, 0xa6, 0xc0, 0xed, 0xd0, 0xe8, 0xd2, 0xaa, 0xa3, 0xac, 0xcb, 0xfc, 0xcb, 0xf9, 0xca, 0xd5, 0xc2, 0xbc, 0xb5, 0xc4, 0xba, 0xba, 0xd7, 0xd6, 0xd2, 0xd1, 0xbe, 0xad, 0xb8, 0xb2, 0xb8, 0xc7, 0xd6, 0xd0, 0xb9, 0xfa, 0xb4, 0xf3, 0xc2, 0xbd, 0x39, 0x39, 0x2e, 0x37, 0x35, 0x25, 0xb5, 0xc4, 0xca, 0xb9, 0xd3, 0xc3, 0xc6, 0xb5, 0xc2, 0xca, 0xa1, 0xa3, 0xb5, 0xab, 0xb6, 0xd4, 0xd3, 0xda, 0xc8, 0xcb, 0xc3, 0xfb},
"GB 2312的出现，基本满足了汉字的计算机处理需要，它所收录的汉字已经覆盖中国大陆99.75%的使用频率。但对于人名",
},
{ // encoded by iconv; text from https://jp.wikipedia.org/wiki/Shift_JIS
map[string]string{"charset": "shift-jis"},
[]byte{0x95, 0xb6, 0x8e, 0x9a, 0x95, 0x84, 0x8d, 0x86, 0x89, 0xbb, 0x95, 0xfb, 0x8e, 0xae, 0x53, 0x68, 0x69, 0x66, 0x74, 0x5f, 0x4a, 0x49, 0x53, 0x82, 0xcc, 0x90, 0xdd, 0x8c, 0x76, 0x8e, 0xd2, 0x82, 0xe7, 0x82, 0xcd, 0x81, 0x41, 0x90, 0xe6, 0x8d, 0x73, 0x82, 0xb5, 0x82, 0xc4, 0x82, 0xe6, 0x82, 0xad, 0x97, 0x98, 0x97, 0x70, 0x82, 0xb3, 0x82, 0xea, 0x82, 0xc4, 0x82, 0xa2, 0x82, 0xbd, 0x4a, 0x49, 0x53, 0x20, 0x43, 0x20, 0x36, 0x32, 0x32, 0x30, 0x81, 0x69, 0x8c, 0xbb, 0x8d, 0xdd, 0x82, 0xcc, 0x4a, 0x49, 0x53, 0x20, 0x58, 0x20, 0x30, 0x32, 0x30, 0x31, 0x81, 0x6a, 0x82, 0xcc, 0x38, 0x83, 0x72, 0x83, 0x62, 0x83, 0x67, 0x95, 0x84, 0x8d, 0x86, 0x81, 0x69, 0x88, 0xc8, 0x89, 0xba, 0x81, 0x75, 0x89, 0x70, 0x90, 0x94, 0x8e, 0x9a, 0x81, 0x45, 0x94, 0xbc, 0x8a, 0x70, 0x83, 0x4a, 0x83, 0x69, 0x81, 0x76, 0x81, 0x6a, 0x82, 0xc6, 0x81, 0x41, 0x4a, 0x49, 0x53, 0x20, 0x43, 0x20, 0x36, 0x32, 0x32, 0x36, 0x81, 0x69, 0x8c, 0xbb, 0x8d, 0xdd, 0x82, 0xcc, 0x4a, 0x49, 0x53, 0x20, 0x58, 0x20, 0x30, 0x32, 0x30, 0x38, 0x81, 0x41, 0x88, 0xc8, 0x89, 0xba, 0x81, 0x75, 0x8a, 0xbf, 0x8e, 0x9a, 0x81, 0x76, 0x81, 0x6a, 0x82, 0xcc, 0x97, 0xbc, 0x95, 0xb6, 0x8e, 0x9a, 0x8f, 0x57, 0x8d, 0x87, 0x82, 0xf0, 0x95, 0x5c, 0x8c, 0xbb, 0x82, 0xb5, 0x82, 0xe6, 0x82, 0xa4, 0x82, 0xc6, 0x82, 0xb5, 0x82, 0xbd, 0x81, 0x42, 0x82, 0xdc, 0x82, 0xbd, 0x81, 0x41, 0x83, 0x74, 0x83, 0x40, 0x83, 0x43, 0x83, 0x8b, 0x82, 0xcc, 0x91, 0xe5, 0x82, 0xab, 0x82, 0xb3, 0x82, 0xe2, 0x8f, 0x88, 0x97, 0x9d, 0x8e, 0x9e, 0x8a, 0xd4, 0x82, 0xcc, 0x92, 0x5a, 0x8f, 0x6b, 0x82, 0xf0, 0x90, 0x7d, 0x82, 0xe9, 0x82, 0xbd, 0x82, 0xdf, 0x81, 0x41, 0x83, 0x47, 0x83, 0x58, 0x83, 0x50, 0x81, 0x5b, 0x83, 0x76, 0x83, 0x56, 0x81, 0x5b, 0x83, 0x50, 0x83, 0x93, 0x83, 0x58, 0x82, 0xc8, 0x82, 0xb5, 0x82, 0xc5, 0x8d, 0xac, 0x8d, 0xdd, 0x89, 0xc2, 0x94, 0x5c, 0x82, 0xc9, 0x82, 0xb7, 0x82, 0xe9, 0x82, 0xb1, 0x82, 0xc6, 0x82, 0xf0, 0x8a, 0xe9, 0x90, 0x7d, 0x82, 0xb5, 0x82, 0xbd, 0x81, 0x42},
"文字符号化方式Shift_JISの設計者らは、先行してよく利用されていたJIS C 6220（現在のJIS X 0201）の8ビット符号（以下「英数字・半角カナ」）と、JIS C 6226（現在のJIS X 0208、以下「漢字」）の両文字集合を表現しようとした。また、ファイルの大きさや処理時間の短縮を図るため、エスケープシーケンスなしで混在可能にすることを企図した。",
},
// add more from mutations of https://en.wikipedia.org/wiki/World_Wide_Web
}
// run tests
for _, val := range testData {
//fmt.Println("Testing ", val)
expected := []byte(val.message)
decoded, err := DecodeCharset(val.original, "text/plain", val.params)
if len(expected) == 0 {
if err == nil {
t.Error("Expected err but have ", err)
} else {
//fmt.Println("Expected err: ", err)
continue
}
} else {
if err != nil {
t.Error("Expected ok but have ", err)
}
}
if bytes.Equal(decoded, expected) {
// fmt.Println("Succesfull decoding of ", val.params, ":", string(decoded))
} else {
t.Error("Wrong encoding of ", val.params, ".Expected\n", expected, "\nbut have\n", decoded)
}
if strings.Compare(val.message, string(decoded)) != 0 {
t.Error("Wrong message for ", val.params, ".Expected\n", val.message, "\nbut have\n", string(decoded))
}
}
}
|
