Javascript - how to load the javascript library while using Google App Engine?

Question

I am running Google App engine with Python, yaml. Now i need to use whichbrowser.net with it (whichbrowser is using also a PHP and the error that occure is in the

But when i am trying to load the Javascript libraries of http://whichbrowser.net/ its failing "Uncaught SyntaxError: Unexpected token < " on detect.js line 1:

detect.js:

<?php

    header("Content-Type: text/javascript");
    header("Cache-Control: no-cache, no-store, must-revalidate, max-age=0"); 
    header("Pragma: no-cache");
    header("Expires: 0"); 

    include('libraries/whichbrowser.php');

    $options = array('headers' => apache_request_headers());
    if (isset($_REQUEST['ua'])) $options['useragent'] = $_REQUEST['ua'];
    if (isset($_REQUEST['e'])) $options['engine'] = intval($_REQUEST['e']);
    if (isset($_REQUEST['f'])) $options['features'] = intval($_REQUEST['f']);
    if (isset($_REQUEST['w'])) $options['width'] = intval($_REQUEST['w']);
    if (isset($_REQUEST['h'])) $options['height'] = intval($_REQUEST['h']);
    $detected = new WhichBrowser($options);

?>

index.html:

  (function(){var p=[],w=window,d=document,e=f=0;p.push('ua='+encodeURIComponent(navigator.userAgent));e|=w.ActiveXObject?1:0;e|=w.opera?2:0;e|=w.chrome?4:0;
  e|='getBoxObjectFor' in d || 'mozInnerScreenX' in w?8:0;e|=('WebKitCSSMatrix' in w||'WebKitPoint' in w||'webkitStorageInfo' in w||'webkitURL' in w)?16:0;
  e|=(e&16&&({}.toString).toString().indexOf("\n")===-1)?32:0;p.push('e='+e);f|='sandbox' in d.createElement('iframe')?1:0;f|='WebSocket' in w?2:0;
  f|=w.Worker?4:0;f|=w.applicationCache?8:0;f|=w.history && history.pushState?16:0;f|=d.documentElement.webkitRequestFullScreen?32:0;f|='FileReader' in w?64:0;
  p.push('f='+f);p.push('r='+Math.random().toString(36).substring(7));p.push('w='+screen.width);p.push('h='+screen.height);var s=d.createElement('script');
  s.src='/whichbrowser/detect.js?' + p.join('&');d.getElementsByTagName('head')[0].appendChild(s);})();

app.yaml:

- url: /whichbrowser
  static_dir: whichbrowser

Andrei Volgin · Accepted Answer · 2014-03-20 05:51:09Z

2

There is nothing special about the way you load JavaScript on App Engine. It loads the same way as it would on any other platform/server.

edited Mar 20, 2014 at 5:51

user285594

answered Mar 19, 2014 at 15:55

Andrei Volgin

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3 Comments

user285594 Over a year ago

I am getting this error in browser: "Uncaught SyntaxError: Unexpected token < " on detect.js line 1: which is <?php

user285594 Over a year ago

See paste.ubuntu.com/7120550 , this is my yaml file. how can i tell to use python and php ?

user285594 Over a year ago

I am running runtime main as Python in my yaml file you can see, but the javascript requires to load a PHP script that is failing, can you please check it in details first. Google App Engine needs to allow me to access Python runtime + PHP runtime from index.html where its only allowing Python runtime.

shollyman · Accepted Answer · 2014-03-20 05:53:06Z

1

Your JS file(s) include PHP processing directives. This will fail if your application is written in python.

You can write your app in PHP, or you can write it in Python. You cannot commingle both languages in the same version.

You could in theory use modules/versions to implement a PHP and a Python version and use dispatch routing to wire them together, but I'd posit that its far simpler if you simply find a browser detection library that doesn't have the PHP language dependency.

More information about modules and dispatch routing: LINK

edited Mar 20, 2014 at 5:53

user285594

answered Mar 19, 2014 at 16:43

shollyman

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Comments

user285594 · Accepted Answer · 2014-03-19 16:48:06Z

0

FYI - Google App Engine - do not allow PHP + Python to run at once. For that you need to use URL of the PHP running in another server.

This is a really Google App Engine trap, cause when the application become larger then there is no way to move.

answered Mar 19, 2014 at 16:48

user285594

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