将cp1252转换为javascript中的unicode [英] Convert cp1252 to unicode in javascript

问题描述

我需要在javascript函数中将cp125 * 2 *文本转换为Unicode utf.

I need to convert cp125*2* text to unicode utf in javascript function.

将CP125 * 1 *转换为我已经找到的utf的函数.

Function to convert CP125*1* to utf I already find.

如果您有此功能，请帮助我，谢谢！

Please help me if you have this functionality, thanks!

推荐答案

如果ISO-8859-1足够接近，则有一个特殊的快捷方式可以将ISO-8859-1-bytes-in-code-units转换为Unicode字符，由于简单的byte = code-point映射:

If ISO-8859-1 is close enough, there is a special shortcut to convert ISO-8859-1-bytes-in-code-units to Unicode characters, due to the simple byte=code-point mapping:

var chars= decodeURIComponent(escape(bytes));

对于任何其他编码，没有内置功能；您将必须包含自己的查找表.例如:

For any other encoding there is no built-in functionality; you would have to include your own lookup tables. For example:

var encodings= {
    // Windows code page 1252 Western European
    //
    cp1252: '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\u20ac\ufffd\u201a\u0192\u201e\u2026\u2020\u2021\u02c6\u2030\u0160\u2039\u0152\ufffd\u017d\ufffd\ufffd\u2018\u2019\u201c\u201d\u2022\u2013\u2014\u02dc\u2122\u0161\u203a\u0153\ufffd\u017e\u0178\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff',

    // Windows code page 1251 Cyrillic
    //
    cp1251: '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\u0402\u0403\u201a\u0453\u201e\u2026\u2020\u2021\u20ac\u2030\u0409\u2039\u040a\u040c\u040b\u040f\u0452\u2018\u2019\u201c\u201d\u2022\u2013\u2014\ufffd\u2122\u0459\u203a\u045a\u045c\u045b\u045f\xa0\u040e\u045e\u0408\xa4\u0490\xa6\xa7\u0401\xa9\u0404\xab\xac\xad\xae\u0407\xb0\xb1\u0406\u0456\u0491\xb5\xb6\xb7\u0451\u2116\u0454\xbb\u0458\u0405\u0455\u0457\u0410\u0411\u0412\u0413\u0414\u0415\u0416\u0417\u0418\u0419\u041a\u041b\u041c\u041d\u041e\u041f\u0420\u0421\u0422\u0423\u0424\u0425\u0426\u0427\u0428\u0429\u042a\u042b\u042c\u042d\u042e\u042f\u0430\u0431\u0432\u0433\u0434\u0435\u0436\u0437\u0438\u0439\u043a\u043b\u043c\u043d\u043e\u043f\u0440\u0441\u0442\u0443\u0444\u0445\u0446\u0447\u0448\u0449\u044a\u044b\u044c\u044d\u044e\u044f'
};

function decodeBytes(bytes, encoding) {
    var enc= encodings[encoding];
    var n= bytes.length;
    var chars= new Array(n);
    for (var i= 0; i<n; i++)
        chars[i]= enc.charAt(bytes.charCodeAt(i));
    return chars.join('');
}

alert(decodeBytes('\xc7\xe4\xf0\xe0\xe2\xf1\xf2\xe2\xf3\xe9 \xec\xe8\xf0', 'cp1251'));
// '\u0417\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439 \u043c\u0438\u0440'
// Здравствуй мир

ETA:

因此，我在加载原始页面html后(在我的firefox插件中)，运行了通过regexp解析此页面的javascript函数.

So, I get the raw page html just after it loaded (in my firefox addon), run the javascript function that parse this page by regexp.

是的，不要那样做.您无法使用正则表达式解析HTML.

Yeah, don't do that. You can't parse HTML with regex.

为什么不让Firefox为给定的字符集解析页面呢?

Why not let Firefox take care of parsing the page for its given charset?

ETA(2):

'koi8-r': '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\u2500\u2502\u250c\u2510\u2514\u2518\u251c\u2524\u252c\u2534\u253c\u2580\u2584\u2588\u258c\u2590\u2591\u2592\u2593\u2320\u25a0\u2219\u221a\u2248\u2264\u2265\xa0\u2321\xb0\xb2\xb7\xf7\u2550\u2551\u2552\u0451\u2553\u2554\u2555\u2556\u2557\u2558\u2559\u255a\u255b\u255c\u255d\u255e\u255f\u2560\u2561\u0401\u2562\u2563\u2564\u2565\u2566\u2567\u2568\u2569\u256a\u256b\u256c\xa9\u044e\u0430\u0431\u0446\u0434\u0435\u0444\u0433\u0445\u0438\u0439\u043a\u043b\u043c\u043d\u043e\u043f\u044f\u0440\u0441\u0442\u0443\u0436\u0432\u044c\u044b\u0437\u0448\u044d\u0449\u0447\u044a\u042e\u0410\u0411\u0426\u0414\u0415\u0424\u0413\u0425\u0418\u0419\u041a\u041b\u041c\u041d\u041e\u041f\u042f\u0420\u0421\u0422\u0423\u0416\u0412\u042c\u042b\u0417\u0428\u042d\u0429\u0427\u042a'

(您可以从Python中获取单字节编码的映射，例如:)

(You can grab the mappings for single-byte encodings out of Python, saying something like:)

>>> ''.join(map(chr, range(256))).decode('koi8-r', 'replace')

我不知道您打算如何读取输入流，但是通常您不需要手动进行这种编码的取消处理.

I don't know how you're going about reading the input stream, but you shouldn't normally need to be doing this kind of encoding unmangling manually.

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