NodeJS 开发博客(四) 日志及安全攻击

node 操作文件：

const fs = require('fs');
const path = require('path');
const filename = path.resolve(__dirname,'data.txt');
// 读取文件内容
fs.readFile(filename,(err,data)=>{
    if(err){
        console.log(err);
    }
    console.log(data.toString());
   
})
// 写入文件
const content = '
的手机壳';
const opt = {
    flag:'a' // 'w'时重新覆盖，'a'是追加
}
fs.writeFile(filename,content,opt,err=>{
    console.log(err);
})
//判断文件是否存在
fs.exists(filename,(exist)=>{
    console.log('exist = '+exist);
})

 

// 标准输入输出[控制台输入，同时输出]
process.stdin.pipe(process.stdout)

//【postman输入body，返回的就是body内容】
const http = require('http')
const server = http.createServer((req, res) => {
    if (req.method === 'POST') {
        req.pipe(res)  // 最主要
    }
})
server.listen(8000)

// 复制文件，两个文件的拷贝
const fs = require('fs')
const path = require('path')
const fileName1 = path.resolve(__dirname, 'data.txt')
const fileName2 = path.resolve(__dirname, 'data-bak.txt')
const readStream = fs.createReadStream(fileName1)
const writeStream = fs.createWriteStream(fileName2)
readStream.pipe(writeStream)
readStream.on('data', chunk => {
    console.log(chunk.toString())
})
readStream.on('end', () => {
    console.log('copy done')
})

//get请求 获取文件的内容
const http = require('http')
const fs = require('fs')
const path = require('path')
const fileName1 = path.resolve(__dirname, 'data.txt')
const server = http.createServer((req, res) => {
    if (req.method === 'GET') {
        const readStream = fs.createReadStream(fileName1)
        readStream.pipe(res)
    }
})
server.listen(8000)

 一 sql 注入攻击

 

二 XSS攻击