zlib.bytesWritten属性是zlib模块的应用程序编程接口,用于指定在处理字节(压缩或解压缩,对于派生类而言正确)之前写入引擎的字节数。
用法:
zlib.bytesWritten
返回值:它返回写入引擎的字节数。
以下示例说明了Node.js中zlib.bytesWritten方法的使用:
范例1:
// Node.js program to demonstrate the
// zlib.bytesWritten Property
// Including assert and zlib
// module
var zlib = require('zlib');
var assert = require('assert');
// Input to be written
const input = Buffer.from('0123456789012345678901');
// Calling deflate method
zlib.deflate(input, (err, deflatedBuffer) => {
assert(!err);
// Declaring buffer and numberRead
var numberRead = 0;
var buffers = [];
// Creating a zip object
var stream = zlib.createGzip()
// Data event
.on('data', function(chunk) {
buffers.push(chunk);
numberRead += chunk.length;
})
// end event
.on('end', function() {
// Calling bytesWritten property
console.log(stream.bytesWritten);
})
.end(deflatedBuffer);
});
输出:
21
范例2:
// Node.js program to demonstrate the
// zlib.bytesWritten property
// Including zlib module
var zlib = require('zlib');
// Input to be written
const input = Buffer.from('NidhiSingh1352');
// Calling deflateRaw method
zlib.deflateRaw(input, (err, buffer) => {
// Creating a Deflate object
var zlibs = zlib.Deflate()
// Data event
.on('data', function(chunk) {})
// end event
.on('end', function() {
// Calling bytesWritten property
console.log(zlibs.bytesWritten);
})
.end(buffer);
});
输出:
16
参考: https://nodejs.org/api/zlib.html#zlib_zlib_byteswritten
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注:本文由纯净天空筛选整理自nidhi1352singh大神的英文原创作品 Node.js | zlib.bytesWritten Property。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。