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39 lines
1.0 KiB
39 lines
1.0 KiB
3 years ago
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# Decode streams into strings The Right Way(tm)
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```javascript
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var fs = require('fs')
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var zlib = require('zlib')
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var strs = require('stringstream')
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var utf8Stream = fs.createReadStream('massiveLogFile.gz')
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.pipe(zlib.createGunzip())
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.pipe(strs('utf8'))
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```
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No need to deal with `setEncoding()` weirdness, just compose streams
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like they were supposed to be!
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Handles input and output encoding:
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```javascript
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// Stream from utf8 to hex to base64... Why not, ay.
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var hex64Stream = fs.createReadStream('myFile')
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.pipe(strs('utf8', 'hex'))
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.pipe(strs('hex', 'base64'))
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```
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Also deals with `base64` output correctly by aligning each emitted data
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chunk so that there are no dangling `=` characters:
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```javascript
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var stream = fs.createReadStream('myFile').pipe(strs('base64'))
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var base64Str = ''
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stream.on('data', function(data) { base64Str += data })
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stream.on('end', function() {
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console.log('My base64 encoded file is: ' + base64Str) // Wouldn't work with setEncoding()
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console.log('Original file is: ' + new Buffer(base64Str, 'base64'))
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})
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```
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