4
[root@localhost ~]# groupadd [选项] 组名
[root@localhost ~]# groupmod [选现] 组名
[root@localhost ~]# groupdel 组名
5
查看用户hlj的uid和gid
[hlj@localhost html]$ id hlj
uid=1002(hlj) gid=1004(hlj) 组=1004(hlj)
把hlj用户加入root组后，查看用户hlj的uid和gid
[root@localhost /]# usermod -G root hlj
[hlj@localhost html]$ id hlj
uid=1002(hlj) gid=1004(hlj) 组=1004(hlj),0(root)
4
const dgram = require("dgram");
const client = dgram.createSocket('udp4');
client.send('客户端发起的信息！', 41234, 'localhost', (err) => {
client.close();
});
7
const http = require('http');
const fs = require('fs');
http.createServer(function (req, res) {
(async () => {
const file = fs.readFileSync('log.txt');
console.log(file.toString())
})();
res.writeHead(200, { 'Content-Type': 'text/html' });
res.write('Node.js says hello!');
res.end();
}).listen(8080);
31
import { test, expect } from '@playwright/test';
test('test', async ({ page, context }) => {
//在创建/导航页面之前开始跟踪
const obj = {
screenshots: true,
snapshots: true,
sources: true
}
await context.tracing.start(obj)
await page.goto('http://good1230.com/');
//遍历菜单
const count = await page.locator('ul.width-135 > a.none-line').count();
const rows = await page.locator('ul.width-135 > a.none-line');
for (let i = 0; i < count; ++i) {
await rows.nth(i).click()
await expect(page).toHaveURL(page.url());
console.log(page.url())
}
// 停止跟踪并将其导出到 zip 存档中。
await context.tracing.stop({ path: "trace.zip" })
});
25
26
94
nginx -s stop 快速关机
nginx -s quit 正常关机
nginx -s reload 更改配置，使用新配置启动新工作进程，正常关闭旧工作进程
nginx -s reopen 重新打开日志文件
运行任务列表命令行实用程序以查看nginx进程：
C:\nginx-1.23.2>tasklist /fi "imagename eq nginx.exe"
Image Name PID Session Name Session# Mem Usage
=============== ======== ============== ========== ============
nginx.exe 652 Console 0 2 780 K
nginx.exe 1332 Console 0 3 112 K
105
https://playwright.dev/docs/api/class-playwright
https://github.com/microsoft/playwright
const http = require('http');
http.createServer(function (req, res) {
const { chromium, firefox, webkit } = require('playwright');
(async () => {
const browser = await chromium.launch(); // Or 'firefox' or 'webkit'.
const page = await browser.newPage();
await page.goto('http://www.good1230.com');
await page.screenshot({ path: `screenshot.png` }); // 图片默认保存到同当前文件的目录下
// other actions...
await browser.close();
})();
res.writeHead(200, {'Content-Type': 'text/html'});
res.write('Node.js says hello!');
res.end();
}).listen(8080);
152
149
https://zh.javascript.info/fetch
async test() {
let response = await fetch('good4/test/1.jpg');
let blob = await response.blob(); // 下载为 Blob 对象
const progressBar_max = document.getElementById("progressBar_max");
progressBar_max.innerHTML = `${(blob.size / 1024 / 1024).toFixed(3)}MB`;
// 为其创建一个 <img>
let img = document.createElement('img');
img.style = 'width:100px';
document.body.append(img);
// 显示它
img.src = URL.createObjectURL(blob);
},
37
19
3
https://zinoui.com/blog/ajax-request-progress-bar
download() {
var progressBar = document.getElementById("progress");
var progressBar_value = document.getElementById("progressBar_value");
var progressBar_max = document.getElementById("progressBar_max");
var xhr = new XMLHttpRequest();
xhr.open("GET", "/good4/1.jpg?" + Math.floor(Math.random() * 99999), true);
xhr.responseType = "text";
xhr.onprogress = function (e) {
console.log(e)
if (e.lengthComputable) {
progressBar.max = e.total;
progressBar.value = e.loaded;
progressBar_value.innerHTML = `${(e.loaded / 1024 / 1024).toFixed(3)}MB`;
progressBar_max.innerHTML = `${(e.total / 1024 / 1024).toFixed(3)}MB`;
}
};
xhr.onloadstart = function (e) {
progressBar.value = 0;
};
xhr.onloadend = function (e) {
progressBar.value = e.loaded;
};
xhr.send(null);
}
13
let num = 0
const imageObj = new Image();
const timer = setInterval(() => {
document.getElementById('time').innerHTML = num++
imageObj.onload = () => {
document.getElementById('img').src = imageObj.src
console.log(num)
clearInterval(timer);
}
},1000)
imageObj.src = 'http://good1230.com/templates/test_img/1.jpg';
16
const text = `日志异常内容：${err}`
const blob = new Blob([text], {type: 'text/plain'});
let formData = new FormData();
formData.append("file", blob, `${new Date().getTime()}.txt`);
uploadException(formData).then(res => {
})
5
this.$once('hook:beforeDestroy', () => {
clearInterval(timer);
})
3
function reverse_a_number(n)
{
n = n + "";
return n.split("").reverse().join("");
}
console.log(reverse_a_number(32243));
8
function coinFlip() {
return (Math.floor(Math.random() * 2) == 0) ? 'heads' : 'tails';
}
3
3
function sleep(milliseconds) {
return new Promise(resolve => setTimeout(resolve, milliseconds));
}
async function fun() {
document.write('Hello World');
for (let i = 1; i <=10 ; i++) {
await sleep(2000);
document.write( i + " " + "Welcome to the javaTpoint.com" + " " + "</br>");
}
}
fun();
12
function downloadCSV(csv, filename) {
var csvFile;
var downloadLink;
//define the file type to text/csv
csvFile = new Blob([csv], {type: 'text/csv'});
downloadLink = document.createElement("a");
downloadLink.download = filename;
downloadLink.href = window.URL.createObjectURL(csvFile);
downloadLink.style.display = "none";
document.body.appendChild(downloadLink);
downloadLink.click();
}
4
var hiddenElement = document.createElement('a');
hiddenElement.href = 'data:text/csv;charset=utf-8,' + encodeURI(csv);
hiddenElement.target = '_blank';
//provide the name for the CSV file to be downloaded
hiddenElement.download = 'Famous Personalities.csv';
hiddenElement.click();
35
const heart_box = document.getElementById('heart')
// 创建标签
let element = document.createElement('div')
element.id = `heart_${keyName}`
element.style.cssText = styles.container
heart_box.appendChild(element)
// 移除标签
setTimeout(function(){
const heart_element = document.getElementById(`heart_${keyName}`)
heart_box.removeChild(heart_element)
const heart_style = document.getElementById(`heart_id_${keyName}`)
document.head.removeChild(heart_style)
}, 3000)
89
- https://www.npmjs.com/package/pdfjs-dist
- https://github.com/mozilla/pdf.js
- 点击以下链接下载web/viewer.html包（注：本人使用git下载无法预览）
- https://mozilla.github.io/pdf.js/getting_started/#download
80
function animate(options) {
var start = performance.now();
requestAnimationFrame(function animate(time) {
// timeFraction от 0 до 1
var timeFraction = (time - start) / options.duration;
if (timeFraction > 1) timeFraction = 1;
// текущее состояние анимации
var progress = options.timing(timeFraction)
options.draw(progress);
if (timeFraction < 1) {
requestAnimationFrame(animate);
}
});
}
111
readAsArrayBuffer(blob)– 以二进制格式读取数据ArrayBuffer。readAsText(blob, [encoding])– 以给定编码的文本字符串形式读取数据（utf-8默认情况下）。readAsDataURL(blob)– 读取二进制数据并将其编码为 base64 数据 url。abort()– 取消操作。- 更多方法：https://javascript.info/file
41
<form id="formElem">
<input type="text" name="name" value="John">
<input type="text" name="surname" value="Smith">
<input type="submit">
</form>
<script>
formElem.onsubmit = async (e) => {
e.preventDefault();
let response = await fetch('/article/formdata/post/user', {
method: 'POST',
body: new FormData(formElem)
});
let result = await response.json();
alert(result.message);
};
</script>
63
22
console.log('%c Hi everyone!', 'color: #1c87c9; font-size: 18px');
console.log('%c Style 1! %c Style 2!',
'color: #1c87c9; background: #ccc; font-size: 20px;',
'color: #8ebf42; background: # 666; font - size: 20 px;'
);
3
let number = 4579
let hexStr = number.toString(16)
console.log(hexStr) // 11e3
let hexStr2 = '11e3'
let number2 = parseInt(hexStr2, 16)
console.log(number2) // 4579
8
let str = "Hello People"
let encodedString = btoa(str)
console.log(encodedString) // "SGVsbG8gUGVvcGxl"
let dec = atob(encodedString)
console.log(dec) // "Hello People"
15
canvas.toBlob(function(blob) {
// blob ready, download it
let link = document.createElement('a');
link.download = 'example';
link.href = URL.createObjectURL(blob);
link.click();
// delete the internal blob reference, to let the browser clear memory from it
URL.revokeObjectURL(link.href);
}, 'image/jpg');
28
<a download="hello.txt" href='#' id="link">Download</a>
<script>
let blob = new Blob(["Hello, world!"], {type: 'text/plain'});
link.href = URL.createObjectURL(blob);
</script>
157
76
226
- 1、引用 https://highlightjs.org/static/demo/styles/default.css
- 2、引用 https://highlightjs.org/static/highlight.site.pack.js
- 3、调用
hljs.highlightAll()函数
67
- https://www.npmjs.com/package/pdfjs-dist
- https://github.com/mozilla/pdf.js
- 点击以下链接下载web/viewer.html包（注：本人使用git下载无法预览）
- https://mozilla.github.io/pdf.js/getting_started/#download
