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Base64 example and be more flexible what type of data is passed.

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This commit is contained in:
Yury Delendik 2015-01-12 14:52:52 -06:00
parent 6ceb652abb
commit 81649b00a9
2 changed files with 99 additions and 3 deletions
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81
examples/learning/helloworld64.html Normal file
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@ -0,0 +1,81 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>'Hello, world!' base64 example</title>
</head>
<body>
<h1>'Hello, world!' example</h1>
<canvas id="the-canvas" style="border:1px solid black"></canvas>
<!-- for legacy browsers we need to use compatibility.js -->
<script src="../../web/compatibility.js"></script>
<script src="../../build/pdf.js"></script>
<script id="script">
// 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;
// In cases when the pdf.worker.js is located at the different folder than the
// pdf.js's one, or the pdf.js is executed via eval(), the workerSrc property
// shall be specified.
//
// PDFJS.workerSrc = '../../build/pdf.worker.js';
// Opening PDF by passing its binary data as a string. It is still preferable
// to use Uint8Array, but string or array-like structure will work too.
PDFJS.getDocument({data: pdfData}).then(function getPdfHelloWorld(pdf) {
// Fetch the first page.
pdf.getPage(1).then(function getPageHelloWorld(page) {
var scale = 1.5;
var viewport = page.getViewport(scale);
// Prepare canvas using PDF page dimensions.
var canvas = document.getElementById('the-canvas');
var context = canvas.getContext('2d');
canvas.height = viewport.height;
canvas.width = viewport.width;
// Render PDF page into canvas context.
var renderContext = {
canvasContext: context,
viewport: viewport
};
page.render(renderContext);
});
});
</script>
<hr>
<h2>JavaScript code:</h2>
<pre id="code"></pre>
<script>
document.getElementById('code').textContent =
document.getElementById('script').text;
</script>
</body>
</html>

21
src/display/api.js
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@ -18,7 +18,7 @@
StatTimer, globalScope, MessageHandler, info, FontLoader, Util, warn,
Promise, PasswordResponses, PasswordException, InvalidPDFException,
MissingPDFException, UnknownErrorException, FontFaceObject,
loadJpegStream, createScratchCanvas, CanvasGraphics,
loadJpegStream, createScratchCanvas, CanvasGraphics, stringToBytes,
UnexpectedResponseException */
'use strict';
@ -162,7 +162,9 @@ PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ?
*
* @typedef {Object} DocumentInitParameters
* @property {string} url - The URL of the PDF.
* @property {TypedArray} data - A typed array with PDF data.
* @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays
* (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded,
* use atob() to convert it to a binary string first.
* @property {Object} httpHeaders - Basic authentication headers.
* @property {boolean} withCredentials - Indicates whether or not cross-site
* Access-Control requests should be made using credentials such as cookies
@ -249,14 +251,27 @@ PDFJS.getDocument = function getDocument(src,
source = src;
}
// copy/use all keys as is except 'url' -- full path is required
var params = {};
for (var key in source) {
if (key === 'url' && typeof window !== 'undefined') {
// The full path is required in the 'url' field.
params[key] = combineUrl(window.location.href, source[key]);
continue;
} else if (key === 'range') {
continue;
} else if (key === 'data' && !(source[key] instanceof Uint8Array)) {
// Converting string or array-like data to Uint8Array.
var pdfBytes = source[key];
if (typeof pdfBytes === 'string') {
params[key] = stringToBytes(pdfBytes);
} else if (typeof pdfBytes === 'object' && pdfBytes !== null &&
!isNaN(pdfBytes.length)) {
params[key] = new Uint8Array(pdfBytes);
} else {
error('Invalid PDF binary data: either typed array, string or ' +
'array-like object is expected in the data property.');
}
continue;
}
params[key] = source[key];
}