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schangxiang@126.com

2025-06-13 6a8393408d8cefcea02b7a598967de8dc1e565c2

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var SliceStream = require('../');
var streamBuffers = require("stream-buffers");
 
var ss = new SliceStream({ length: 5}, function (buf, sliceEnd, extra) {
  if (!sliceEnd) {
    return this.push(buf);
  }
  this.push(buf);
  return this.push(null); //signal end of data
});
 
var sourceStream = new streamBuffers.ReadableStreamBuffer();
sourceStream.put("Hello World");
var writableStream = new streamBuffers.WritableStreamBuffer();
 
sourceStream
  .pipe(ss)
  .pipe(writableStream)
  .once('close', function () {
    var str = writableStream.getContentsAsString('utf8');
    console.log('First 5 bytes piped:', "'" + str + "'");
    sourceStream.destroy();
  });
 
//Output
//Piped data before pattern occurs: 'Hello'