Mozilla實驗室最近在github上開源了一款js庫pdf.js，用來讀取PDF文件。

http://mozilla.github.io/pdf.js/

Using base64 encoded?PDF

HTML頁面內(nèi)容

<script src="//mozilla.github.io/pdf.js/build/pdf.js"></script><h1>PDF.js 'Hello, base64!' example</h1><canvas id="the-canvas"></canvas>

JavaScript代碼

// atob() is used to convert base64 encoded PDF to binary-like data. // (See also https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/ // Base64_encoding_and_decoding.) var pdfData = atob('JVBERi0xLjcKCjEgMCBvYmogICUgZW50cnkgcG9pbnQKPDwKICAvVHlwZSAvQ2F0YWxvZwog' +'IC9QYWdlcyAyIDAgUgo+PgplbmRvYmoKCjIgMCBvYmoKPDwKICAvVHlwZSAvUGFnZXMKICAv' +'TWVkaWFCb3ggWyAwIDAgMjAwIDIwMCBdCiAgL0NvdW50IDEKICAvS2lkcyBbIDMgMCBSIF0K' +'Pj4KZW5kb2JqCgozIDAgb2JqCjw8CiAgL1R5cGUgL1BhZ2UKICAvUGFyZW50IDIgMCBSCiAg' +'L1Jlc291cmNlcyA8PAogICAgL0ZvbnQgPDwKICAgICAgL0YxIDQgMCBSIAogICAgPj4KICA+' +'PgogIC9Db250ZW50cyA1IDAgUgo+PgplbmRvYmoKCjQgMCBvYmoKPDwKICAvVHlwZSAvRm9u' +'dAogIC9TdWJ0eXBlIC9UeXBlMQogIC9CYXNlRm9udCAvVGltZXMtUm9tYW4KPj4KZW5kb2Jq' +'Cgo1IDAgb2JqICAlIHBhZ2UgY29udGVudAo8PAogIC9MZW5ndGggNDQKPj4Kc3RyZWFtCkJU' +'CjcwIDUwIFRECi9GMSAxMiBUZgooSGVsbG8sIHdvcmxkISkgVGoKRVQKZW5kc3RyZWFtCmVu' +'ZG9iagoKeHJlZgowIDYKMDAwMDAwMDAwMCA2NTUzNSBmIAowMDAwMDAwMDEwIDAwMDAwIG4g' +'CjAwMDAwMDAwNzkgMDAwMDAgbiAKMDAwMDAwMDE3MyAwMDAwMCBuIAowMDAwMDAwMzAxIDAw' +'MDAwIG4gCjAwMDAwMDAzODAgMDAwMDAgbiAKdHJhaWxlcgo8PAogIC9TaXplIDYKICAvUm9v' +'dCAxIDAgUgo+PgpzdGFydHhyZWYKNDkyCiUlRU9G');// Disable workers to avoid yet another cross-origin issue (workers need // the URL of the script to be loaded, and dynamically loading a cross-origin // script does not work). // PDFJS.disableWorker = true;// The workerSrc property shall be specified. PDFJS.workerSrc = '//mozilla.github.io/pdf.js/build/pdf.worker.js';// Using DocumentInitParameters object to load binary data. var loadingTask = PDFJS.getDocument({data: pdfData}); loadingTask.promise.then(function(pdf) {console.log('PDF loaded');// Fetch the first pagevar pageNumber = 1;pdf.getPage(pageNumber).then(function(page) {console.log('Page loaded');var scale = 1.5;var viewport = page.getViewport(scale);// Prepare canvas using PDF page dimensionsvar canvas = document.getElementById('the-canvas');var context = canvas.getContext('2d');canvas.height = viewport.height;canvas.width = viewport.width;// Render PDF page into canvas contextvar renderContext = {canvasContext: context,viewport: viewport};var renderTask = page.render(renderContext);renderTask.then(function () {console.log('Page rendered');});}); }, function (reason) {// PDF loading errorconsole.error(reason); });

總結(jié)

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