Node.js实现文本与pdf相互转换的代码详解

const express = require("express");
const fs = require("fs");
const PDFParser = require("pdf-parse");
const cors = require("cors");

const pdfFilePath = "./xxx_实习生.pdf";

const app = express();

// 解决跨域问题
app.use(cors());
app.use(express.static(__dirname));
app.use(express.json());

app.post("/form2pdf", (req, res) => {
  console.log(req.body);
  const str = "";

    // 1. 读取pdf文件
  fs.readFile(pdfFilePath, (err, pdfBuffer) => {
    if (err) {
      console.log(err);
      return;
    }

    PDFParser(pdfBuffer).then((pdfData) => {
      const pages = pdfData.text.split("\n\n");
      console.log(pages);
      let str;
      for (let i = 1; i < pages.length; i++) str = str + pages[i];
      console.log(str);
    });
  });
});

app.listen(3000, () => {
  console.log("Server is running on port 3000");
});

const express = require("express");
const fs = require("fs");
const cors = require("cors");
const PDFDocument = require("pdfkit");

const app = express();

// 解决跨域问题
app.use(cors());
app.use(express.static(__dirname));
app.use(express.json());

app.post("/form2pdf", (req, res) => {
  console.log(req.body);
  const str = "";
  // 使用 pdfkit 生成pdf

  // 创建 PDF 文档
  const doc = new PDFDocument({
    margin: 50, // 控制上下左右留白
  });

  // 输出到文件
  // 如果有同名的 直接覆盖
  doc.pipe(fs.createWriteStream("output.pdf"));

  // ========== Header ==========
  function addHeader(doc) {
    doc.fontSize(20).text(req.body.name, { align: "center" }).moveDown();
    doc
      .moveTo(50, doc.y) // 从左边开始画横线
      .lineTo(550, doc.y) // 到右边
      .stroke();
    doc.moveDown();
  }

  // ========== Footer ==========
  function addFooter(doc) {
    const range = doc.bufferedPageRange(); // 所有页

    for (let i = range.start; i < range.start + range.count; i++) {
      doc.switchToPage(i);
      doc
        .fontSize(10)
        .fillColor("gray")
        .text(`第 ${i + 1} 页`, 0, doc.page.height - 50, {
          align: "center",
        });
    }
  }

  // ========== Body ==========
  function addBody(doc) {
    doc.fontSize(12);
    doc.text(req.body.name + " " + req.body.sex + " " + req.body.age, {
      align: "left",
      lineGap: 4,
    });
  }

  // 添加内容
  addHeader(doc);
  addBody(doc);

  // 结束前添加 footer（多页也有效）
  doc.end();
  doc.on("end", () => {
    addFooter(doc);
  });

  // 把后端的pdf地址返回给前端
  res.json({
    code: 200,
    data: "http://localhost:3000/output.pdf",
  });
  res.send("PDF generated successfully!");
});

app.listen(3000, () => {
  console.log("Server is running on port 3000");
});

<iframe :src="url" width="100%" height="1200px"></iframe>

const onSubmit = () => {
  axios.post("http://localhost:3000/form2pdf", form).then((res) => {
    url.value = res.data.data + "?t=" + Date.now();
    console.log(url);
  });
};

res.setHeader("Cache-Control", 'no-store');

app.use(express.static(__dirname, {
  setHeaders: (res, path) => {
    if (path.endsWith('.pdf')) {
      res.setHeader('Cache-Control', 'no-store');
    }
  }
}));