ltsv.js

LTSV parser and formatter

playgound

http://sasaplus1.github.io/ltsv.js/

Installation

npm

$ npm install ltsv

bower

$ bower install ltsv

Usage

node.js

var ltsv = require('ltsv');

browser

<script src="ltsv.min.js"></script>

Example

ltsv.parse(
  'label1:value1\tlabel2:value2\n' +
  'label1:value1\tlabel2:value2\n' +
  'label1:value1\tlabel2:value2'
);
// [ { label1: 'value1', label2: 'value2' }, 
//   { label1: 'value1', label2: 'value2' }, 
//   { label1: 'value1', label2: 'value2' } ] 
 
ltsv.parseLine('label1:value1\tlabel2:value2');
// { label1: 'value1', label2: 'value2' } 
ltsv.parseLine('label1:value1\tlabel2:value2\n');
// { label1: 'value1', label2: 'value2' } 
ltsv.parseLine('label1:value1\tlabel2:value2\r\n');
// { label1: 'value1', label2: 'value2' } 
 
ltsv.format([
  { label1: 'value1', label2: 'value2' },
  { label1: 'value1', label2: 'value2' },
  { label1: 'value1', label2: 'value2' }
]);
// 'label1:value1\tlabel2:value2\nlabel1:value1\tlabel2:value2\nlabel1:value1\tlabel2:value2' 
 
ltsv.format({ label1: 'value1', label2: 'value2' });
// 'label1:value1\tlabel2:value2' 

var fs = require('fs'),
    ltsv = require('ltsv'),
    ltjs = ltsv.createLtsvToJsonStream({
      toObject: false,
      strict: false
    });
 
// access.log: 
// l1:v1\tl2:v2\n 
// l1:v1\tl2:v2\n 
// l1:v1\tl2:v2\n 
fs.createReadStream('./access.log').pipe(ltjs).pipe(process.stdout);
// {"l1":"v1","l2":"v2"}{"l1":"v1","l2":"v2"}{"l1":"v1","l2":"v2"} 

Functions

parse(text)

• text
  • String - LTSV text
• return
  • Object[] - parsed objects

split to LTSV records.

throw SyntaxError if text has no separator.

parseLine(line)

• line
  • String - LTSV line
• return
  • Object - parsed object

split to LTSV record.

throw SyntaxError if line has no separator.

parseStrict(text)

• text
  • String - LTSV text
• return
  • Object[] - parsed objects

split to LTSV records and validate label and value of fields.

throw SyntaxError if text has no separator. also throw SyntaxError if text has unexpected character.

parseLineStrict(line)

• line
  • String - LTSV line
• return
  • Object - parsed object

split to LTSV record.

throw SyntaxError if line has no separator. also throw SyntaxError if line has unexpected character.

format(data)

• data
  • Object|Object[] - object or object array
• return
  • String - LTSV text

convert to LTSV text.

throw TypeError if data is not an object or array.

formatStrict(data)

• data
  • Object|Object[] - object or object array
• return
  • String - LTSV text

convert to LTSV text.

throw TypeError if data is not an object or array. also throw SyntaxError if data has unexpected character.

createLtsvToJsonStream([options])

• options
  • Object - option object
• return
  • LtsvToJsonStream - LTSV to JSON stream

return LtsvToJsonStream instance. this function cannot use by browser.

options

• encoding
  • String - StringDecoder's encoding, default is utf8
• toObject
  • Boolean - convert to Object if true, default is false
• strict
  • Boolean - strict parse if true, default is false

Test

node.js

$ npm install
$ npm test

browser

$ npm install
$ npm run bower
$ npm run testem

License

The MIT license. Please see LICENSE file.