Currently, I am in the process of developing a Chrome App that essentially acts as a wrapper for the main app within a webview. The webview sends a Base64 encoded PDF as a message to the app, which then creates a hidden iframe and loads the PDF into the frame before calling print on it.
Everything seems to be functioning perfectly on my development machine (Windows 10, using Chrome Beta version 47). However, I've encountered an issue where this functionality does not work on any other machine or when testing with different versions of Chrome. In these cases, the iframe doesn't display the PDF, resulting in a blank page in the print preview.
I'm puzzled by what could be causing this discrepancy. Could there be a specific setting or permission enabled on my machine that is facilitating this behavior?
Below is a simplified Chrome App configuration that I utilized to replicate the problem:
manifest.json
{
"manifest_version": 2,
"version": "2",
"name": "Print PDF test",
"app": {
"background": {
"scripts": ["main.js"]
}
},
"permissions": [
]
}
main.js
chrome.app.runtime.onLaunched.addListener(function() {
chrome.app.window.create('index.html', {
innerBounds: {
width: 768,
height: 1024
}
});
});
index.html
<!DOCTYPE html>
<html style="height: 100%">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Print PDF</title>
</head>
<body style="height: 100%">
</body>
<script src="app.js"></script>
</html>
app.js
function showPDF() {
var base64pdf = '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...