如何在新网页上使用 pdf.js 脚本获取 Google Drive PDF url？

Question

我有一个使用谷歌驱动器的两个网站的示例，每当他们有一个新文档时，他们只需更改 URL 中的唯一 ID，仅此而已。它也是 SEO 友好的，并被谷歌索引。那么它的原始代码应该是什么？

• 演示 1 - Click Here {通过检查工具检查代码}
• 演示 2 - Click Here {通过检查工具检查代码}
• Demo 1 Web site Image/Inspect code
• Demo 2 Website Image/Inspect code

我只想使用 google drive 进行存储，并在我网站的 pdf.js 画布中调用它们，以增加页面浏览量、用户时间，并在 PDF 网页上显示 AdSense 广告，就像上面提供的演示一样。

Answer 1

这是 PDF.JS 在网页中显示 PDF 的演示

var url = 'https://raw.githubusercontent.com/mozilla/pdf.js/ba2edeae/web/compressed.tracemonkey-pldi-09.pdf'; //Loaading the PDF from URL

// Loaded via <script> tag, create shortcut to access PDF.js exports.
var pdfjsLib = window['pdfjs-dist/build/pdf'];

// The workerSrc property shall be specified.
pdfjsLib.GlobalWorkerOptions.workerSrc = '//mozilla.github.io/pdf.js/build/pdf.worker.js';

var pdfDoc = null,
    pageNum = 1,
    pageRendering = false,
    pageNumPending = null,
    scale = 0.8,
    canvas = document.getElementById('canvas'),
    ctx = canvas.getContext('2d');

/**
 * Get page info from document, resize canvas accordingly, and render page.
 * @param num Page number.
 */
function renderPage(num) {
  pageRendering = true;
  // Using promise to fetch the page
  pdfDoc.getPage(num).then(function(page) {
    var viewport = page.getViewport({scale: scale});
    canvas.height = viewport.height;
    canvas.width = viewport.width;

    // Render PDF page into canvas context
    var renderContext = {
      canvasContext: ctx,
      viewport: viewport
    };
    var renderTask = page.render(renderContext);

    // Wait for rendering to finish
    renderTask.promise.then(function() {
      pageRendering = false;
      if (pageNumPending !== null) {
        // New page rendering is pending
        renderPage(pageNumPending);
        pageNumPending = null;
      }
    });
  });

  // Update page counters
  document.getElementById('page_num').textContent = num;
}

/**
 * If another page rendering in progress, waits until the rendering is
 * finised. Otherwise, executes rendering immediately.
 */
function queueRenderPage(num) {
  if (pageRendering) {
    pageNumPending = num;
  } else {
    renderPage(num);
  }
}

/**
 * Displays previous page.
 */
function onPrevPage() {
  if (pageNum <= 1) {
    return;
  }
  pageNum--;
  queueRenderPage(pageNum);
}
document.getElementById('prev').addEventListener('click', onPrevPage);

/**
 * Displays next page.
 */
function onNextPage() {
  if (pageNum >= pdfDoc.numPages) {
    return;
  }
  pageNum++;
  queueRenderPage(pageNum);
}
document.getElementById('next').addEventListener('click', onNextPage);

/**
 * Asynchronously downloads PDF.
 */
pdfjsLib.getDocument(url).promise.then(function(pdfDoc_) {
  pdfDoc = pdfDoc_;
  document.getElementById('page_count').textContent = pdfDoc.numPages;

  // Initial/first page rendering
  renderPage(pageNum);
});

#canvas {
  border: 1px solid black;
}
button{
  border: none;
  background: #000;
  color: #fff;
  margin: 10px;
  padding: 10px;
}

<script src="//mozilla.github.io/pdf.js/build/pdf.js"></script>

<h1>PDF.js Example</h1>

<div>
  <button id="prev">Previous</button>
  <button id="next">Next</button>
  &nbsp; &nbsp;
  <span>Page: <span id="page_num"></span> / <span id="page_count"></span></span>
</div>

<canvas id="canvas"></canvas>

有关更多详细信息和文档，请访问：

https://mozilla.github.io/pdf.js/getting_started/