82 lines
1.8 KiB
Markdown
82 lines
1.8 KiB
Markdown
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chardet [](https://travis-ci.org/runk/node-chardet)
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=====
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Chardet is a character detection module for NodeJS written in pure Javascript.
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Module is based on ICU project http://site.icu-project.org/, which uses character
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occurency analysis to determine the most probable encoding.
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## Installation
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```
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npm i chardet
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```
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## Usage
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To return the encoding with the highest confidence:
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```javascript
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var chardet = require('chardet');
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chardet.detect(Buffer.from('hello there!'));
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// or
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chardet.detectFile('/path/to/file', function(err, encoding) {});
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// or
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chardet.detectFileSync('/path/to/file');
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```
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To return the full list of possible encodings:
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```javascript
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var chardet = require('chardet');
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chardet.detectAll(Buffer.from('hello there!'));
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// or
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chardet.detectFileAll('/path/to/file', function(err, encoding) {});
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// or
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chardet.detectFileAllSync('/path/to/file');
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//Returned value is an array of objects sorted by confidence value in decending order
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//e.g. [{ confidence: 90, name: 'UTF-8'}, {confidence: 20, name: 'windows-1252', lang: 'fr'}]
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```
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## Working with large data sets
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Sometimes, when data set is huge and you want to optimize performace (in tradeoff of less accuracy),
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you can sample only first N bytes of the buffer:
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```javascript
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chardet.detectFile('/path/to/file', { sampleSize: 32 }, function(err, encoding) {});
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```
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## Supported Encodings:
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* UTF-8
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* UTF-16 LE
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* UTF-16 BE
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* UTF-32 LE
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* UTF-32 BE
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* ISO-2022-JP
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* ISO-2022-KR
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* ISO-2022-CN
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* Shift-JIS
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* Big5
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* EUC-JP
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* EUC-KR
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* GB18030
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* ISO-8859-1
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* ISO-8859-2
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* ISO-8859-5
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* ISO-8859-6
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* ISO-8859-7
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* ISO-8859-8
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* ISO-8859-9
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* windows-1250
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* windows-1251
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* windows-1252
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* windows-1253
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* windows-1254
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* windows-1255
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* windows-1256
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* KOI8-R
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Currently only these encodings are supported, more will be added soon.
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