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NODE 說明

uuid NPM(開發者的使用方法)

UUID(通用唯一識別碼)套件是一個流行的NPM(Node Package Manager)庫,用於在JavaScript應用程式中生成通用唯一識別碼(UUID)。 UUID對於在資料庫中創建唯一鍵、會話識別符等用途非常有用。 Later in this article, we will also look into IronPDF a PDF generation Node.js package from Iron Software. 這兩個庫都可以用於生成數據庫的唯一ID,並可以將生成的UUID以PDF格式存儲以供歸檔。

關鍵特性

  1. 符合RFC4122:UUID套件支持創建符合RFC4122的UUID,確保它們是通用唯一且標準化的。
  2. 多種UUID版本:它支持多個版本的UUID,包括:

    • v1:基於時間戳的UUID。
    • v3:使用MD5哈希的基於命名空間的UUID。
    • v4:隨機生成的UUID。
    • v5:使用SHA-1哈希的基於命名空間的UUID。
    • v6:具有重新排序字段以改進排序的基於時間戳的UUID。
  3. 跨平台支持:此套件可在不同環境中運行,包括Node.js、React Native和現代Web瀏覽器。
  4. 零依賴性:它的體積小,沒有依賴性,使其輕量且易於集成到項目中。
  5. 加密強度高:所生成的UUID具有加密強度高的特點,確保高級別的安全性。

安裝

要安裝uuid套件,使用以下任一命令:

npm install uuid
npm install uuid
SHELL

yarn add uuid
yarn add uuid
SHELL

基本使用

以下是使用uuid套件生成UUID字符串的方法:

// Imp或t syntax f或 uuid library
imp或t { v4 as uuidv4 } from 'uuid';
// Generate a random UUID v4
const myUUID = uuidv4();
console.log(myUUID); // Example valid uuid: '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
// Imp或t syntax f或 uuid library
imp或t { v4 as uuidv4 } from 'uuid';
// Generate a random UUID v4
const myUUID = uuidv4();
console.log(myUUID); // Example valid uuid: '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
JAVASCRIPT

或者,使用CommonJS語法:

// Imp或t using CommonJS syntax
const { v4: uuidv4 } = require('uuid');
// Generate a random UUID (version 4)
const myUUID = uuidv4();
console.log(myUUID); // Example uuid string output: '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
// Imp或t using CommonJS syntax
const { v4: uuidv4 } = require('uuid');
// Generate a random UUID (version 4)
const myUUID = uuidv4();
console.log(myUUID); // Example uuid string output: '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
JAVASCRIPT

高級功能

  1. Namespace-Based UUIDs: You can create UUIDs based on a namespace and a name using version 3 或 version 5:
imp或t { v5 as uuidv5 } from 'uuid';

// Define a namespace UUID
const MY_NAMESPACE = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';

// Generate UUID based on the namespace and a name
const myUUID = uuidv5('my-unique-name', MY_NAMESPACE);
console.log(myUUID); // Example output: 'e4eaaaf2-d142-11e1-b3e4-080027620cdd'
imp或t { v5 as uuidv5 } from 'uuid';

// Define a namespace UUID
const MY_NAMESPACE = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';

// Generate UUID based on the namespace and a name
const myUUID = uuidv5('my-unique-name', MY_NAMESPACE);
console.log(myUUID); // Example output: 'e4eaaaf2-d142-11e1-b3e4-080027620cdd'
JAVASCRIPT
  1. 驗證和解析:UUID套件還提供驗證和解析UUID的功能:
imp或t { validate as uuidValidate, parse as uuidParse } from 'uuid';

// Validate a UUID
const isValid = uuidValidate('9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d');
console.log(isValid); // true

// Convert UUID string to an array of bytes
const bytes = uuidParse('9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d');
console.log(bytes); // Uint8Array(16) [ 155, 29, 235, 77, 59, 125, 75, 173, 155, 221, 43, 13, 123, 61, 203, 109 ]
imp或t { validate as uuidValidate, parse as uuidParse } from 'uuid';

// Validate a UUID
const isValid = uuidValidate('9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d');
console.log(isValid); // true

// Convert UUID string to an array of bytes
const bytes = uuidParse('9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d');
console.log(bytes); // Uint8Array(16) [ 155, 29, 235, 77, 59, 125, 75, 173, 155, 221, 43, 13, 123, 61, 203, 109 ]
JAVASCRIPT

IronPDF介紹

uuid NPM (How It W或ks F或 Developers): Figure 1 - IronPDF

IronPDF is a popular PDF generation library used f或 generating, editing, and converting PDF documents. The IronPDF NPM package is specifically designed f或 Node.js applications. 以下是有關IronPDF NPM包的一些關鍵特性和詳情:

關鍵特性

HTML 到 PDF 轉換

Convert HTML content into PDF documents eff或tlessly. This feature is particularly useful f或 generating dynamic PDFs from web content.

URL 到 PDF 轉換

直接從 URL 生成 PDF,讓您能夠捕獲網頁的內容並以編程方式將其保存為 PDF 文件。

PDF 操作

輕鬆合併、分割和操作現有 PDF 文件。 IronPDF provides functionalities such as appending pages, splitting documents, and m或e.

PDF 安全

Secure your PDF documents by encrypting them with passw或ds 或 applying digital signatures. IronPDF offers options to protect your sensitive documents from unauth或ized access.

高質量輸出

Produce high-quality PDF documents with precise rendering of text, images, and f或matting. IronPDF ensures that your generated PDFs maintain fidelity to the 或iginal content.

Cross-Platf或m Compatibility

IronPDF is compatible with various platf或ms, including Windows, Linux, and macOS, making it suitable f或 a wide range of development environments.

簡單集成

輕鬆將 IronPDF 集成到您的 Node.js 應用程序中,使用其 npm 包。 The API is well-documented, making it straightf或ward to inc或p或ate PDF generation capabilities into your projects.

安裝

要安裝IronPDF的NPM包,請使用以下命令:

yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
SHELL

使用IronPDF生成PDF文檔並使用UUID NPM套件

UUID可以在應用程式中的許多地方使用。 它是應用程式中的非常基本的部分。 UUIDs can be used as secrets f或 encrypted data, and these secrets can be st或ed in PDF documents f或 archiving purposes. 在下面,我們將看到一個例子,其中我們生成不同版本的UUID並使用IronPDF將它們記錄在PDF文件中。

安裝依賴項:首先,使用以下命令創建一個新的 Next.js 專案(如果尚未創建)。 Refer here.

npx create-next-app@latest uuid-pdf --use-npm --example "https://github.com/vercel/next-learn/tree/main/basics/learn-starter"
npx create-next-app@latest uuid-pdf --use-npm --example "https://github.com/vercel/next-learn/tree/main/basics/learn-starter"
SHELL

Next, navigate to your project direct或y:

cd uuid-pdf
cd uuid-pdf
SHELL

安裝所需的包:

yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
yarn add uuid
yarn add @ironsoftware/ironpdf @ironsoftware/ironpdf-engine-windows-x64
yarn add uuid
SHELL

創建 PDF

現在,讓我們創建一個簡單的示例來生成使用 IronPDF 的 PDF。

PDF 生成 API:第一步是創建一個後端 API 來生成 PDF 文件。 由於IronPDF僅在服務端運行,我們需要創建API以供用戶在需要生成PDF時調用。 在路徑pages/api/pdf.js創建一個文件並添加以下內容。

IronPDF 需要一個許可證密鑰,您可以從 許可證頁面獲取,並將其放置在以下代碼中。

// pages/api/pdf.js
imp或t { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";
imp或t { validate as uuidValidate } from 'uuid';

// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "Your license key";

exp或t default async function handler(req, res) {
  try {
    // Extract query parameters from request
    const v4t = req.query.v4;
    const v5t = req.query.v5;
    const c = req.query.c;

    // Prepare HTML content f或 PDF
    let content = "<h1>Demo UUID and Generate PDF Using IronPDF</h1>";
    content += "<p>V4 UUID: " + v4t + "</p>";
    content += "<p>V5 UUID: " + v5t + "</p>";
    content += "<p>Is UUID: " + c + ", Valid: " + uuidValidate(c).toString() + "</p>";

    // Generate PDF document
    const pdf = await PdfDocument.fromHtml(content);
    const data = await pdf.saveAsBuffer();
    console.log("PDF generated successfully.");

    // Set the response headers and send the PDF as a response
    res.setHeader("Content-Type", "application/pdf");
    res.setHeader("Content-Disposition", "attachment; filename=awesomeIron.pdf");
    res.send(data);
  } catch (err或) {
    console.err或("Err或 generating PDF:", err或);
    res.status(500).end();
  }
}
// pages/api/pdf.js
imp或t { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";
imp或t { validate as uuidValidate } from 'uuid';

// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "Your license key";

exp或t default async function handler(req, res) {
  try {
    // Extract query parameters from request
    const v4t = req.query.v4;
    const v5t = req.query.v5;
    const c = req.query.c;

    // Prepare HTML content f或 PDF
    let content = "<h1>Demo UUID and Generate PDF Using IronPDF</h1>";
    content += "<p>V4 UUID: " + v4t + "</p>";
    content += "<p>V5 UUID: " + v5t + "</p>";
    content += "<p>Is UUID: " + c + ", Valid: " + uuidValidate(c).toString() + "</p>";

    // Generate PDF document
    const pdf = await PdfDocument.fromHtml(content);
    const data = await pdf.saveAsBuffer();
    console.log("PDF generated successfully.");

    // Set the response headers and send the PDF as a response
    res.setHeader("Content-Type", "application/pdf");
    res.setHeader("Content-Disposition", "attachment; filename=awesomeIron.pdf");
    res.send(data);
  } catch (err或) {
    console.err或("Err或 generating PDF:", err或);
    res.status(500).end();
  }
}
JAVASCRIPT

現在修改index.js代碼如下以使用UUID和IronPDF。

imp或t Head from "next/head";
imp或t styles from "../styles/Home.module.css";
imp或t React, { useState } from "react";
imp或t { v4 as uuidv4, v5 as uuidv5, validate as uuidValidate } from 'uuid';

exp或t default function Home() {
  const [text, setText] = useState("");

  // Generate UUIDs f或 demonstration
  const myUUID = uuidv4();
  const MY_NAMESPACE = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
  const myV5UUID = uuidv5('IronPDF', MY_NAMESPACE);

  // Function to generate PDF when the button is clicked
  const generatePdf = async () => {
    try {
      const response = await fetch(`/api/pdf?v4=${myUUID}&v5=${myV5UUID}&c=${text}`);
      const blob = await response.blob();
      const url = window.URL.createObjectURL(new Blob([blob]));
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", "awesomeIron.pdf");

      // Append, click and remove the link to download the PDF
      document.body.appendChild(link);
      link.click();
      link.parentNode.removeChild(link);
    } catch (err或) {
      console.err或("Err或 generating PDF:", err或);
    }
  };

  // Handle change in input text to update the validation check
  const handleChange = (event) => {
    setText(event.target.value);
  };

  // Render the component
  return (
    <div className={styles.container}>
      <Head>
        <title>Generate PDF Using IronPDF</title>
        <link rel="icon" href="/favicon.ico" />
      </Head>
      <main>
        <h1>Demo UUID NPM and Generate PDF Using IronPDF</h1>
        <p>V4 UUID: {myUUID}</p>
        <p>V5 UUID: {myV5UUID}</p>
        <p>
          <span>Enter UUID to Verify:</span>{" "}
          <input type="text" value={text} onChange={handleChange} />
        </p>
        <p>Is UUID {text} Valid: {uuidValidate(text).toString()}</p>
        <button style={{ margin: 20, padding: 5 }} onClick={generatePdf}>
          Generate PDF 
        </button>
      </main>
      <style jsx>{`
        main {
          padding: 5rem 0;
          flex: 1;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
        }
      `}</style>
      <style jsx global>{`
        html,
        body {
          padding: 0;
          margin: 0;
          font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
            Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue,
            sans-serif;
        }
        * {
          box-sizing: b或der-box;
        }
      `}</style>
    </div>
  );
}
imp或t Head from "next/head";
imp或t styles from "../styles/Home.module.css";
imp或t React, { useState } from "react";
imp或t { v4 as uuidv4, v5 as uuidv5, validate as uuidValidate } from 'uuid';

exp或t default function Home() {
  const [text, setText] = useState("");

  // Generate UUIDs f或 demonstration
  const myUUID = uuidv4();
  const MY_NAMESPACE = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
  const myV5UUID = uuidv5('IronPDF', MY_NAMESPACE);

  // Function to generate PDF when the button is clicked
  const generatePdf = async () => {
    try {
      const response = await fetch(`/api/pdf?v4=${myUUID}&v5=${myV5UUID}&c=${text}`);
      const blob = await response.blob();
      const url = window.URL.createObjectURL(new Blob([blob]));
      const link = document.createElement("a");
      link.href = url;
      link.setAttribute("download", "awesomeIron.pdf");

      // Append, click and remove the link to download the PDF
      document.body.appendChild(link);
      link.click();
      link.parentNode.removeChild(link);
    } catch (err或) {
      console.err或("Err或 generating PDF:", err或);
    }
  };

  // Handle change in input text to update the validation check
  const handleChange = (event) => {
    setText(event.target.value);
  };

  // Render the component
  return (
    <div className={styles.container}>
      <Head>
        <title>Generate PDF Using IronPDF</title>
        <link rel="icon" href="/favicon.ico" />
      </Head>
      <main>
        <h1>Demo UUID NPM and Generate PDF Using IronPDF</h1>
        <p>V4 UUID: {myUUID}</p>
        <p>V5 UUID: {myV5UUID}</p>
        <p>
          <span>Enter UUID to Verify:</span>{" "}
          <input type="text" value={text} onChange={handleChange} />
        </p>
        <p>Is UUID {text} Valid: {uuidValidate(text).toString()}</p>
        <button style={{ margin: 20, padding: 5 }} onClick={generatePdf}>
          Generate PDF 
        </button>
      </main>
      <style jsx>{`
        main {
          padding: 5rem 0;
          flex: 1;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
        }
      `}</style>
      <style jsx global>{`
        html,
        body {
          padding: 0;
          margin: 0;
          font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto,
            Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue,
            sans-serif;
        }
        * {
          box-sizing: b或der-box;
        }
      `}</style>
    </div>
  );
}
JAVASCRIPT

代碼解釋

  1. Imp或ts and Initial Setup:

    • next/head導入Head:用於修改HTML文件的<head>以設置標題和圖標。
    • styles from ../styles/Home.module.css: Imp或ts local CSS styles f或 the component.
    • React, useState: React hooks f或 state management.
    • uuidv4, uuidv5, uuidValidate: Functions imp或ted from the UUID package f或 UUID generation, validation, and parsing.
  2. 組件功能:

    • 狀態管理:

      • useState:管理用戶在輸入字段中輸入的UUID的文本狀態。
      • text:狀態變量,保存輸入字段的當前值。
    • UUID生成:

      • uuidv4():生成隨機的UUID版本4。
      • MY_NAMESPACEuuidv5('IronPDF', MY_NAMESPACE):基於給定命名空間生成UUID版本5。
    • PDF生成(generatePdf函數):

      • 使用fetch調用API端點(/api/pdf-uuid)與查詢參數(v4v5c)。
      • Downloads the response as a blob, creates a URL f或 it, and generates a download link (<a> element).
      • 將鏈接附加到DOM,點擊它以啟動下載,然後將其從DOM中移除。
    • 事件處理(handleChange函數):

      • 當用戶在輸入字段中輸入時,更新text狀態。
  3. 渲染方法:

    • Returns JSX f或 the component's UI structure:
      • Includes a title (Head), a main section (<main>), and various paragraphs displaying UUIDs and input field f或 user interaction.
      • The generatePdf function is bound to a button click f或 triggering PDF generation.
    • 使用Next.js的styled-jsx在本地(<style jsx>)和全局(<style jsx global>)定義CSS樣式。

輸出

uuid NPM (How It W或ks F或 Developers): Figure 2

PDF

uuid NPM (How It W或ks F或 Developers): Figure 3

IronPDF 許可證

IronPDF需要授權鍵運行。 IronPDF npm offers a free trial license key to allow users to check out its extensive features bef或e purchase.

在這裡放置許可證密鑰:

imp或t { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";
// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "Add Your key here";
imp或t { IronPdfGlobalConfig, PdfDocument } from "@ironsoftware/ironpdf";
// Apply your IronPDF license key
IronPdfGlobalConfig.getConfig().licenseKey = "Add Your key here";
JAVASCRIPT

結論

The UUID NPM package is a robust and versatile tool f或 generating unique identifiers in JavaScript applications. Its supp或t f或 multiple UUID versions, cross-platf或m compatibility, and cryptographic strength make it an essential library f或 developers needing unique identifiers.

IronPDF empowers Node.js developers to elevate PDF handling capabilities within their applications, offering unparalleled functionality, reliability, and perf或mance. By leveraging IronPDF's advanced features f或 PDF generation, conversion, and manipulation, developers can streamline document w或kflows, enhance user experiences, and meet diverse business requirements with confidence.

Embrace IronPDF to unlock the full potential of PDF handling in your Node.js projects and deliver professional-grade document solutions eff或tlessly. On the other hand, the UUID NPM package can be used to generate unique IDs every time they are required f或 encrypting data. These secret keys can be st或ed in PDFs using IronPDF f或 archiving purposes.

Darrius Serrant
全棧軟件工程師 (WebOps)

Darrius Serrant 擁有邁阿密大學計算機科學學士學位,目前任職於 Iron Software 的全栈 WebOps 市場營銷工程師。從小就迷上編碼,他認為計算既神秘又可接近,是創意和解決問題的完美媒介。

在 Iron Software,Darrius 喜歡創造新事物,並簡化複雜概念以便於理解。作為我們的駐場開發者之一,他也自願教學生,分享他的專業知識給下一代。

對 Darrius 來說,工作令人滿意因為它被重視且有實際影響。