diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/img/1.jpeg" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/img/1.jpeg"
new file mode 100644
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diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/img/3.jpeg" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/img/3.jpeg"
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diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/img/4.jpeg" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/img/4.jpeg"
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diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/js/\347\255\224\345\244\215.js" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/js/\347\255\224\345\244\215.js"
new file mode 100644
index 0000000000000000000000000000000000000000..f021e7d17c1ca41481a8f352ff99a80057af1792
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232/js/\347\255\224\345\244\215.js"
@@ -0,0 +1,40 @@
+// ##作业:
+
+// 还是把http服务优化下
+
+// - 去实现静态资源----css放一个目录，img 放一个目录，js 放一个目录
+// - 同步改成异步(有能力同学)
+
+console.log("不会！！！------------------------------------");
+
+let http = require("http");
+let fs = require("fs");
+
+const {url} = require("inspector");
+
+let server = http.createServer();
+
+server.on('request', function(req, res) {
+
+ //url http://localhost:8080/imgs/demo.png?page=1
+
+ console.log(req.url);
+
+ if (req.url.lastIndexOf(".") > -1) {
+ let path = req.url.split("?")[0]; //获取到path路径 /imgs/demo.png
+
+ path = '.' + path; // ./imgs/demo.png
+ if (fs.existsSync(path)) {
+ fs.readFile(path, function(err, data) {
+ console.log(data);
+ res.write(data);
+ res.end();
+
+ });
+ }
+
+ }
+
+});
+
+server.listen(8080);
diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\274\202\346\255\245\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245-\345\244\215\345\210\273.js" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\274\202\346\255\245\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245-\345\244\215\345\210\273.js"
new file mode 100644
index 0000000000000000000000000000000000000000..d25e41752622bbe0cca77b5aa5615bcb10dec3f1
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\270\211\346\254\241\344\275\234\344\270\232/\345\274\202\346\255\245\346\226\207\344\273\266\347\232\204\345\206\231\345\205\245-\345\244\215\345\210\273.js"
@@ -0,0 +1,55 @@
+// 作业:
+// 因为异步较难，大家撸一遍，课程笔记就好，笔记已上传
+
+let fs = require("fs");
+//在fs模块中没Sync的函数是异步函数
+//open(path, flags[, mode])
+
+// path -路径
+// flags -标识 r w a(append)
+// mode -不需求
+// callback - 一个回调函数 ， 异步函数是没返回值的，都是通过callbak 回调函数去处理
+
+// 1.回调的‘写入完成’后输出 ？ 2.回调的‘写入完成’先输出？
+
+// 计算机基础知识 程序是载入的内存，cpu 去调度执行----
+// 文件存在计算机哪? 磁盘速度跟cpu相比？cpu快
+// open cpu 发指令-----磁盘---扫磁道去文件 openSync在同步函数中呢，cpu 等磁盘共做完---下一步
+// 异步就是不让cpu闲着,因为cpu快，在代码中可能会碰到阻塞的场景(磁盘,网络....)
+
+fs.open("./async.txt", 'w', function(err, fd) {
+ if (err) {
+ console.log(err);
+ } else {
+ let msg = "今天我们学习异步文件写入，有点晕哦"
+ bf = Buffer.from(msg);
+ fs.write(fd, bf, function(err, writeNum, bf2) {
+ console.log(err);
+ console.log(writeNum);
+ console.log(bf2.toString());
+ console.log('"done!');
+ });
+
+ /*
+ today天我们学习异步文件写入，有点晕哦 ！------------------------------------------------
+
+ write的参数:
+ fd: number, 文件描述符
+ buffer: TBuffer,buffer 对象
+ offset: number | undefined | null, 偏移量--就是buffer的下标偏移的个数
+ length: number | undefined | null, 长度---写入的个数
+ position: number | undefined | null, 位置
+ callback: 回调函数 err,writeNum,buffer
+ */
+
+ console.log("写入完成");
+
+ fs.close(fd, function(err) {
+ console.log("我被关闭了哦，别想我");
+ console.log(err);
+ })
+
+ }
+});
+
+console.log("study node fs async");
diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\215.js" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\215.js"
new file mode 100644
index 0000000000000000000000000000000000000000..ee755ce1e7e10e147c774578e12c1a3b9b888b99
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\344\272\224\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\215.js"
@@ -0,0 +1,36 @@
+// 作业:
+// 创建一个大文件，然后去计算一下流方式读取的内存消耗
+
+var fs = require('fs');
+var os = require('os');
+
+var startMem = os.freemem(); //系统的空闲内存
+// 打开一个流---- highWaterMark 设置一次性读取的字节长度
+var readStream = fs.createReadStream('sample.txt', {
+ highWaterMark: 3
+});
+readStream.setEncoding('UTF8');
+
+var data = '';
+readStream.on('open', function() {
+ console.log('文件已打开')；
+})；
+
+readStream.on('data', function(chunk) {
+ data + = chunk;
+});
+
+readStream.on('end', function() {
+ var endMem = os.freemem();
+ //内存大小的基本单位时字节 /1024(转位kb)/1024(转位mb)
+ console.log((endMem - startMem) / 1024 / 1024);
+ console.log(data);
+});
+
+readStream.on('error', function(err) {
+ console.log(err.stack);
+});
+
+readStream.on('close', function() {
+ console.log('结束')；
+})；
diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/nodesample.sql" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/nodesample.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..388f036652788bdc80f75bf23286bdf56ed33a26
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/nodesample.sql"
@@ -0,0 +1,13 @@
+CREATE DATABASE IF NOT EXISTS nodesample CHARACTER SET UTF8;
+
+USE nodesample;
+
+SET FOREIGN_KEY_CHECKS=0;
+
+DROP TABLE IF EXISTS `userinfo`;
+CREATE TABLE `userinfo` (
+`Id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
+`UserName` varchar(64) NOT NULL COMMENT '用户名',
+`UserPass` varchar(64) NOT NULL COMMENT '用户密码',
+PRIMARY KEY (`Id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用户信息表';
\ No newline at end of file
diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\2151.js" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\2151.js"
new file mode 100644
index 0000000000000000000000000000000000000000..02f9e6702086cd9652996ef289a2a33e1ba1a95f
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\2151.js"
@@ -0,0 +1,68 @@
+//作业：
+// 新建表，数据库名与表名自便，用mysql 模块实现curd(增删改查)
+
+var mysql = require('mysql'); //调用MySQL模块
+
+//创建一个connection
+var connection = mysql.createConnection({
+ host: '127.0.0.1', //主机
+ user: 'root', //MySQL认证用户名
+ password: 'abcd', //MySQL认证用户密码
+ port: '3306', //端口号
+ database: 'nodesample',
+});
+
+
+connection.connect();
+
+
+var userAddSql = 'INSERT INTO userinfo(Id,UserName,UserPass) VALUES(0,?,?)';
+var userAddSql_Params = ['Wilson', 'abcd'];
+//增
+connection.query(userAddSql, userAddSql_Params, function(err, result) {
+ if (err) {
+ console.log('[INSERT ERROR] - ', err.message);
+ return;
+ }
+console.log('--------------INSERT-----------------');
+//console.log('INSERT ID:',result.insertId);
+console.log('INSERT ID:', result);
+console.log('-------------------------------------');
+
+var userModSql = 'UPDATE userinfo SET UserName = ?,UserPass = ? WHERE Id = ?';
+var userModSql_Params = ['钟馗', '678',1];
+//改
+connection.query(userModSql,userModSql_Params,function (err, result) {
+ if(err){
+ console.log('[UPDATE ERROR] - ',err.message);
+ return;
+}
+console.log('------------UPDATE-----------------');
+console.log('UPDATE affectedRows',result.affectedRows);
+console.log('-------------------------------------');
+
+var userGetSql = 'SELECT * FROM userinfo';
+//查
+connection.query(userGetSql,function (err, result) {
+ if(err){
+ console.log('[SELECT ERROR] - ',err.message);
+ return;
+}
+
+console.log('--------------SELECT------------');
+console.log(result);
+console.log('-------------------------------------');
+
+var userDelSql = 'DELETE FROM userinfo';
+//删
+connection.query(userDelSql,function (err, result) {
+ if(err){
+ console.log('[DELETE ERROR] - ',err.message);
+ return;
+ }
+
+console.log('-----------------DELETE-------------------');
+console.log('DELETE affectedRows',result.affectedRows);
+console.log('-------------------------------------');
+
+connection.end();
\ No newline at end of file
diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\2152.js" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\2152.js"
new file mode 100644
index 0000000000000000000000000000000000000000..bc5ac0073256997c84f7de9ab9516441702693c7
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\2152.js"
@@ -0,0 +1,45 @@
+//作业：
+// 新建表，数据库名与表名自便，用mysql 模块实现curd(增删改查)
+
+var mysql = require('mysql'); //调用MySQL模块
+
+//创建一个connection
+var connection = mysql.createConnection({
+ host: '127.0.0.1', //主机
+ user: 'root', //MySQL认证用户名
+ password: 'abcd', //MySQL认证用户密码
+ port: '3306', //端口号
+});
+//创建一个connection
+connection.connect(function(err) {
+ if (err) {
+ console.log('[query] - :' + err);
+ return;
+
+ }
+ console.log('[connection connect] succeed!');
+
+});
+//执行SQL语句
+connection.query('SELECT 1 + 1 AS solution', function(err, rows, fields) {
+
+ if (err) {
+ console.log('[query] - :' + err);
+
+ return;
+
+ }
+ console.log('The solution is: ', rows[0].solution);
+
+});
+//关闭connection
+connection.end(function(err) {
+
+ if (err) {
+
+ return;
+
+ }
+ console.log('[connection end] succeed!');
+
+});
diff --git "a/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\215.js" "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\215.js"
new file mode 100644
index 0000000000000000000000000000000000000000..5cd8639e911ec13768eaa3fdb1feb292ba64a133
--- /dev/null
+++ "b/\346\235\250\345\205\213\347\277\224/\347\254\254\345\205\255\346\254\241\344\275\234\344\270\232/\347\255\224\345\244\215.js"
@@ -0,0 +1,46 @@
+// ##作业:
+
+// * 创建一个web服务器
+// * 根据不同的url 去读取页面,给前端渲染
+
+//url 有好几种模式:
+//常见的 .html 对seo比较友好;
+//?page=1&num=2 (域名+'?'+'参数=值'+(如果还有参数+'&'));
+//比如 --- http://localhost/?module=home&controller=user&action=login&var=value.
+
+let http = require("http");
+let fs = require("fs");
+
+let server = http.createServer();
+
+server.on('request', function(req, res) {
+
+ res.setHead('content-type', 'text/html;charset=utf-8');
+ //url 定义成 ?page=(number) 比如 ?page=1(标识为第一个页面) ?page=2(标识为第二个页面)
+ //let url = req.url;
+ // if(url=='/index.html'){
+ // //res.write("我是index.html
");
+ // let bf=fs.readFileSync('./files/1.txt')
+ // res.write(bf);
+ // }
+ // if(url=='/index2.html'){
+ // //res.write("我是index.html
");
+ // let bf=fs.readFileSync('./files/2.txt')
+ // res.write(bf);
+ // }
+ let url = req.url;
+ console.log(url);
+ if (url.indexof('?page') > -1) {
+
+ let pageInfo = url.split('?')[1];
+ console.log(pageInfo);
+ let num = pageInfo.split("=")[1];
+ let fileName = './files' + num + '.txt';
+ let bf = fs.readFileSync(fileName);
+ res.write(bf);
+ }
+ //end标识这个请求结束了
+ res.end();
+});
+//绑定端口
+server.listen(8080);