fs-extra 文件管理

一.fs-extra 文件管理node

$npm install fs-extra --save

1.建立一個目錄npm

fs.mkdir(path, [mode], [callback(err)])
path            將建立的目錄路徑
mode          目錄權限(讀寫權限),默認0777
callback      回調,傳遞異常參數err

建立目錄ui

await fs.mkdir(path.join(__dirname, "/images", dir));

 

2.刪除一個空目錄url

fs.rmdir(path,callback)

 

3.讀取一個目錄blog

fs.readdir(path,callback(err,files))

  

四、複製文件圖片

fs.copy('G:/works/node爬蟲/images', 'G:/works/node爬蟲/test', function(err) {
    if (err) return console.error(err)
    console.log("success!")
});

 

5.移動文件、目錄, 會刪除之前的, 等於更名ip

fs.move('G:/works/node爬蟲/images', 'G:/works/node爬蟲/testss', function(err) {
    if (err) return console.error(err)
    console.log("success!")
});

  

6.刪除文件、目錄rem

fs.remove('G:/works/node爬蟲/images2', function(err) {
    if (err) return console.error(err)
    console.log("success!")
})

  

7.建立文件、目錄get

// 目錄
var dir = 'G:/works/node爬蟲/my'
fs.ensureDir(dir, function(err) {
  console.log(err) // => null 
  //dir has now been created, including the directory it is to be placed in 
});
// 文件
var file = 'G:/works/node爬蟲/my/file.txt' fs.ensureFile(file, function(err) { console.log(err) // => null //file has now been created, including the directory it is to be placed in });

 

8.寫入文件, 寫入txt.文件時, "\r\n"是斷行it

var file = 'G:/works/node爬蟲/my/file.txt'
var str = "hello Alan!"
fs.outputFile(file, str, function(err) {
    console.log(err) // => null 

    fs.readFile(file, 'utf8', function(err, data) {
        console.log(data) // => hello! 
    })
})

 

// 下載某圖片到指定目錄

const request = require('superagent')
const cheerio = require('cheerio')
const fs = require('fs-extra')
const path = require('path')

function download() {
  const url2 = "https://imgsa.baidu.com/forum/w%3D580/sign=cbeba091a5014c08193b28ad3a7a025b/1ba6b90e7bec54e7141e3726b5389b504ec26ab4.jpg"
  const filename = url2.split('/').pop()
  const req = request.get(url2)
  req.pipe(fs.createWriteStream(path.join(__dirname, 'images', filename)))
}
download()
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