如何解决如何在新网页上使用pdf.js脚本获取Google云端硬盘PDF网址?
我有两个使用google drive的网站的示例,每当它们有新文档时,它们只是更改URL中的唯一ID。它也是SEO友好的,并由Google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驱动器进行存储,并在我网站的pdf.js画布中调用它们以增加页面浏览量,增加用户时间,并在PDF网页上展示AdSense广告,如上面提供的演示一样。
解决方法
这是PDF.JS的演示,在网页上显示PDF
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>
<span>Page: <span id="page_num"></span> / <span id="page_count"></span></span>
</div>
<canvas id="canvas"></canvas>
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