解壓文件時出現文件錯誤意外結束node.js

Question

我想在node.js中使用Zlib庫解壓縮文本文件，但當文件的Readstream內容朝向Gunzip對象滾動時，出現意外的文件錯誤結束，這裏是我的代碼片段：

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); 
}); 

的greet.txt中有一些隨機的文字，並用在目錄中已經創建的所有文件，但是一個錯誤事件被觸發時的最後一行到達

Answer 1

所有node操作都是異步的，因此您必須監聽finish事件。

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

這裏是工作代碼：

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); 
    }); 
});