node . js zlib . createbrotlicompress()方法

原文:https://www . geesforgeks . org/node-js-zlib-createbrotlicompress-method/

zlib.createBrotliCompress()方法是 zlib 模块的内置应用编程接口，用于创建 BrotliCompress 对象。

语法:

zlib.createBrotliCompress( options )

参数:该方法接受单参数选项，这是一个保存 zlib 选项的可选参数。

返回值:返回一个新的 BrotliCompress 对象。

下面的例子说明了在 Node.js 中 zlib.createBrotliCompress()方法的使用:

例 1:

// Node.js program to demonstrate the     
// createBrotliCompress() method

// Including zlib and fs module
const zlib = require("zlib");
const fs = require('fs');

// Creating readable Stream
const inp = fs.createReadStream('input.txt');

// Creating writable stream
const out = fs.createWriteStream('input.txt.gz');

// Calling createBrotliCompress method
const brot = zlib.createBrotliCompress();

// Piping
inp.pipe(brot).pipe(out);
console.log("Program Completed!");

输出:

Program Completed!

例 2:

// Node.js program to demonstrate the     
// createBrotliCompress() method

// Including zlib and fs module
const zlib = require("zlib");
const fs = require('fs');

// Creating readable Stream
const inp = fs.createReadStream('input.txt');

// Creating writable stream
const out = fs.createWriteStream('input.txt.gz');

// Calling createBrotliCompress method
const brot = zlib.createBrotliCompress();

// Piping
inp.pipe(out).pipe(brot);
console.log("Program Completed!");

输出:

Error [ERR_STREAM_CANNOT_PIPE]: Cannot pipe, not readable
    at WriteStream.Writable.pipe (_stream_writable.js:243:24)
    at /home/runner/CorruptFlawedSoftwaresuite/index.js:19:15
    at Script.runInContext (vm.js:133:20)
    at Object. (/run_dir/interp.js:156:20)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)

在这里，管道没有按照正确的顺序进行，因此会出现错误。

参考资料:https://nodejs . org/API/zlib . html # zlib _ zlib _ create bromless _ options

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