Question

我正在尝试使用node.js中的Zlib库解压缩文本文件，但是当我将文件的Readstream内容传递给Gunzip对象时，我得到意外的文件结束错误，这是我的代码段：

const fs = require('fs');
const zlib = require("zlib");

var readable = fs.createReadStream(__dirname + '/greet.txt');
var readableGz = fs.createReadStream(__dirname + '/greet.txt.gz');
var writableGz = fs.createWriteStream(__dirname + '/greet.txt.gz');
var gZip = zlib.createGzip();
var gUnZip = zlib.createGunzip();

readable.pipe(gZip).pipe(writableGz);   // compress file
readableGz.pipe(gUnZip).on("error", function(e){    // uncompress file
    console.log("error, " + e);
});

greet.txt中有一些随机文本，所有使用的文件都已在目录中创建，但是当最后一行到达时会触发错误事件

Answer 1

所有node操作都是异步的，因此您必须侦听finish事件。

readable.pipe(gZip).pipe(writableGz).on('finish', function () {  // finished
    console.log('Done. Now you can start reading.'); 
});

这是工作代码：

const fs = require('fs');
const zlib = require("zlib");

var readable = fs.createReadStream('./greet.txt');
var writableGz = fs.createWriteStream('./greet.txt.gz');
var gZip = zlib.createGzip();
var gUnZip = zlib.createGunzip();

readable.pipe(gZip).pipe(writableGz).on('finish', function () {  // finished
    console.log('Done. Now you can start reading.');
    var readableGz = fs.createReadStream('./greet.txt.gz');
    readableGz.pipe(gUnZip).on("error", function (e) {    // uncompress file
        console.log("error, " + e);
    });
});

解压缩文件node.js时出现意外的文件结束错误

1 个答案: