我正在寻找一种纯粹的Ruby解决方案，将UTF-8转换为GSM-7并返回，并在此过程中进行septet编码/解码。
这里的背景是：通过网关和REST请求发送和接收SMS。
我找到了一个libiconv（http://mobiletidings.com/2009/07/06/gsm-7-encoding-gnu-libiconv/）的解决方案（它或多或少有效，但由于某些缺陷而未被libiconv接受）。
我更喜欢纯粹的Ruby解决方案，很可能有一个用于转换的查找表和一个7-8位编码器来处理生成的septets。
那里的人已经这样做了吗？有什么指针吗？
谢谢，汤姆！
答案 0 :(得分：3)
我一直在寻找完全一样的（将UTF-8转换为GSM 03.38），但一无所获。所以我写了一个小转换器：
require 'iconv'
class String
GSM0338_MAP = [
0x00, 0x0040, # COMMERCIAL AT
0x01, 0x00A3, # POUND SIGN
0x02, 0x0024, # DOLLAR SIGN
0x03, 0x00A5, # YEN SIGN
0x04, 0x00E8, # LATIN SMALL LETTER E WITH GRAVE
0x05, 0x00E9, # LATIN SMALL LETTER E WITH ACUTE
0x06, 0x00F9, # LATIN SMALL LETTER U WITH GRAVE
0x07, 0x00EC, # LATIN SMALL LETTER I WITH GRAVE
0x08, 0x00F2, # LATIN SMALL LETTER O WITH GRAVE
0x09, 0x00E7, # LATIN SMALL LETTER C WITH CEDILLA
0x0B, 0x00D8, # LATIN CAPITAL LETTER O WITH STROKE
0x0C, 0x00F8, # LATIN SMALL LETTER O WITH STROKE
0x0E, 0x00C5, # LATIN CAPITAL LETTER A WITH RING ABOVE
0x0F, 0x00E5, # LATIN SMALL LETTER A WITH RING ABOVE
0x11, 0x005F, # LOW LINE
[0x1B, 0x14], 0x005E, # CIRCUMFLEX ACCENT
[0x1B, 0x28], 0x007B, # LEFT CURLY BRACKET
[0x1B, 0x29], 0x007D, # RIGHT CURLY BRACKET
[0x1B, 0x2F], 0x005C, # REVERSE SOLIDUS
[0x1B, 0x3C], 0x005B, # LEFT SQUARE BRACKET
[0x1B, 0x3D], 0x007E, # TILDE
[0x1B, 0x3E], 0x005D, # RIGHT SQUARE BRACKET
[0x1B, 0x40], 0x007C, # VERTICAL LINE
0x1C, 0x00C6, # LATIN CAPITAL LETTER AE
0x1D, 0x00E6, # LATIN SMALL LETTER AE
0x1E, 0x00DF, # LATIN SMALL LETTER SHARP S (German)
0x1F, 0x00C9, # LATIN CAPITAL LETTER E WITH ACUTE
0x20, 0x0020, # SPACE
0x21, 0x0021, # EXCLAMATION MARK
0x22, 0x0022, # QUOTATION MARK
0x23, 0x0023, # NUMBER SIGN
0x24, 0x00A4, # CURRENCY SIGN
0x25, 0x0025, # PERCENT SIGN
0x26, 0x0026, # AMPERSAND
0x27, 0x0027, # APOSTROPHE
0x00, 0x0040, # COMMERCIAL AT
0x01, 0x00A3, # POUND SIGN
0x02, 0x0024, # DOLLAR SIGN
0x03, 0x00A5, # YEN SIGN
0x04, 0x00E8, # LATIN SMALL LETTER E WITH GRAVE
0x05, 0x00E9, # LATIN SMALL LETTER E WITH ACUTE
0x06, 0x00F9, # LATIN SMALL LETTER U WITH GRAVE
0x07, 0x00EC, # LATIN SMALL LETTER I WITH GRAVE
0x08, 0x00F2, # LATIN SMALL LETTER O WITH GRAVE
0x09, 0x00E7, # LATIN SMALL LETTER C WITH CEDILLA
0x0B, 0x00D8, # LATIN CAPITAL LETTER O WITH STROKE
0x0C, 0x00F8, # LATIN SMALL LETTER O WITH STROKE
0x0E, 0x00C5, # LATIN CAPITAL LETTER A WITH RING ABOVE
0x0F, 0x00E5, # LATIN SMALL LETTER A WITH RING ABOVE
0x11, 0x005F, # LOW LINE
[0x1B, 0x14], 0x005E, # CIRCUMFLEX ACCENT
[0x1B, 0x28], 0x007B, # LEFT CURLY BRACKET
[0x1B, 0x29], 0x007D, # RIGHT CURLY BRACKET
[0x1B, 0x2F], 0x005C, # REVERSE SOLIDUS
[0x1B, 0x3C], 0x005B, # LEFT SQUARE BRACKET
[0x1B, 0x3D], 0x007E, # TILDE
[0x1B, 0x3E], 0x005D, # RIGHT SQUARE BRACKET
[0x1B, 0x40], 0x007C, # VERTICAL LINE
0x1C, 0x00C6, # LATIN CAPITAL LETTER AE
0x1D, 0x00E6, # LATIN SMALL LETTER AE
0x1E, 0x00DF, # LATIN SMALL LETTER SHARP S (German)
0x1F, 0x00C9, # LATIN CAPITAL LETTER E WITH ACUTE
0x20, 0x0020, # SPACE
0x21, 0x0021, # EXCLAMATION MARK
0x22, 0x0022, # QUOTATION MARK
0x23, 0x0023, # NUMBER SIGN
0x24, 0x00A4, # CURRENCY SIGN
0x25, 0x0025, # PERCENT SIGN
0x26, 0x0026, # AMPERSAND
0x27, 0x0027, # APOSTROPHE
0x28, 0x0028, # LEFT PARENTHESIS
0x29, 0x0029, # RIGHT PARENTHESIS
0x2A, 0x002A, # ASTERISK
0x2B, 0x002B, # PLUS SIGN
0x2C, 0x002C, # COMMA
0x2D, 0x002D, # HYPHEN-MINUS
0x2E, 0x002E, # FULL STOP
0x2F, 0x002F, # SOLIDUS
0x30, 0x0030, # DIGIT ZERO
0x31, 0x0031, # DIGIT ONE
0x32, 0x0032, # DIGIT TWO
0x33, 0x0033, # DIGIT THREE
0x34, 0x0034, # DIGIT FOUR
0x35, 0x0035, # DIGIT FIVE
0x36, 0x0036, # DIGIT SIX
0x37, 0x0037, # DIGIT SEVEN
0x38, 0x0038, # DIGIT EIGHT
0x39, 0x0039, # DIGIT NINE
0x3A, 0x003A, # COLON
0x3B, 0x003B, # SEMICOLON
0x3C, 0x003C, # LESS-THAN SIGN
0x3D, 0x003D, # EQUALS SIGN
0x3E, 0x003E, # GREATER-THAN SIGN
0x3F, 0x003F, # QUESTION MARK
0x40, 0x00A1, # INVERTED EXCLAMATION MARK
0x41, 0x0041, # LATIN CAPITAL LETTER A
0x42, 0x0042, # LATIN CAPITAL LETTER B
0x42, 0x0392, # GREEK CAPITAL LETTER BETA
0x43, 0x0043, # LATIN CAPITAL LETTER C
0x44, 0x0044, # LATIN CAPITAL LETTER D
0x45, 0x0045, # LATIN CAPITAL LETTER E
0x46, 0x0046, # LATIN CAPITAL LETTER F
0x47, 0x0047, # LATIN CAPITAL LETTER G
0x48, 0x0048, # LATIN CAPITAL LETTER H
0x49, 0x0049, # LATIN CAPITAL LETTER I
0x4A, 0x004A, # LATIN CAPITAL LETTER J
0x4B, 0x004B, # LATIN CAPITAL LETTER K
0x4C, 0x004C, # LATIN CAPITAL LETTER L
0x4D, 0x004D, # LATIN CAPITAL LETTER M
0x4E, 0x004E, # LATIN CAPITAL LETTER N
0x4F, 0x004F, # LATIN CAPITAL LETTER O
0x50, 0x0050, # LATIN CAPITAL LETTER P
0x51, 0x0051, # LATIN CAPITAL LETTER Q
0x52, 0x0052, # LATIN CAPITAL LETTER R
0x53, 0x0053, # LATIN CAPITAL LETTER S
0x54, 0x0054, # LATIN CAPITAL LETTER T
0x55, 0x0055, # LATIN CAPITAL LETTER U
0x56, 0x0056, # LATIN CAPITAL LETTER V
0x57, 0x0057, # LATIN CAPITAL LETTER W
0x58, 0x0058, # LATIN CAPITAL LETTER X
0x59, 0x0059, # LATIN CAPITAL LETTER Y
0x5A, 0x005A, # LATIN CAPITAL LETTER Z
0x5B, 0x00C4, # LATIN CAPITAL LETTER A WITH DIAERESIS
0x5C, 0x00D6, # LATIN CAPITAL LETTER O WITH DIAERESIS
0x5D, 0x00D1, # LATIN CAPITAL LETTER N WITH TILDE
0x5E, 0x00DC, # LATIN CAPITAL LETTER U WITH DIAERESIS
0x5F, 0x00A7, # SECTION SIGN
0x60, 0x00BF, # INVERTED QUESTION MARK
0x61, 0x0061, # LATIN SMALL LETTER A
0x62, 0x0062, # LATIN SMALL LETTER B
0x63, 0x0063, # LATIN SMALL LETTER C
0x64, 0x0064, # LATIN SMALL LETTER D
0x65, 0x0065, # LATIN SMALL LETTER E
0x66, 0x0066, # LATIN SMALL LETTER F
0x67, 0x0067, # LATIN SMALL LETTER G
0x68, 0x0068, # LATIN SMALL LETTER H
0x69, 0x0069, # LATIN SMALL LETTER I
0x6A, 0x006A, # LATIN SMALL LETTER J
0x6B, 0x006B, # LATIN SMALL LETTER K
0x6C, 0x006C, # LATIN SMALL LETTER L
0x6D, 0x006D, # LATIN SMALL LETTER M
0x6E, 0x006E, # LATIN SMALL LETTER N
0x6F, 0x006F, # LATIN SMALL LETTER O
0x70, 0x0070, # LATIN SMALL LETTER P
0x71, 0x0071, # LATIN SMALL LETTER Q
0x72, 0x0072, # LATIN SMALL LETTER R
0x73, 0x0073, # LATIN SMALL LETTER S
0x74, 0x0074, # LATIN SMALL LETTER T
0x75, 0x0075, # LATIN SMALL LETTER U
0x76, 0x0076, # LATIN SMALL LETTER V
0x77, 0x0077, # LATIN SMALL LETTER W
0x78, 0x0078, # LATIN SMALL LETTER X
0x79, 0x0079, # LATIN SMALL LETTER Y
0x7A, 0x007A, # LATIN SMALL LETTER Z
0x7B, 0x00E4, # LATIN SMALL LETTER A WITH DIAERESIS
0x7C, 0x00F6, # LATIN SMALL LETTER O WITH DIAERESIS
0x7D, 0x00F1, # LATIN SMALL LETTER N WITH TILDE
0x7E, 0x00FC, # LATIN SMALL LETTER U WITH DIAERESIS
0x7F, 0x00E0 # LATIN SMALL LETTER A WITH GRAVE
]
# Returns a new string in GSM 03.38 encoding
def to_gsm0338
latin1_to_gsm_map = Hash.new
GSM0338_MAP.each_slice(2) { |gsm_symbol, latin1_symbol| latin1_to_gsm_map[latin1_symbol] = gsm_symbol }
Iconv.iconv('ISO-8859-1', 'UTF-8', self).first.unpack('C*').collect { |utf8_symbol| latin1_to_gsm_map[utf8_symbol] }.flatten.pack('c*')
end
end
# Test
if $0 == __FILE__
puts "[ÖÄÜöäü]~|-_".to_gsm0338.inspect
end
我现在可以用这个来通过ruby中的sms_client（smsclient.org）发送短信：
system "sms_client 0123456789 '#{msg.to_gsm0338}'"