web.py and JavaScript problems

Question

I have been trying to make a page which combines web.py and JavaScript, and with the following code:

$code: 
     def getContents(fname): 
          a = req.get(fname) 
          return a.content 

<script type="text/javascript"> 
     document.write("$getContents('http://mysite.net')"); 
</script>

Here, req is passed on my template's $def with() function, being a module object of the Python Requests module, from which I execute methods.)

Problem is, the document is blank, which means the document.write function got no input. Is there a way around this? Am I doing this in a wrong way?

EDIT: The function output is not empty; if you use plain HTML to print it it will just work.

Thanks in advance.

(I've also posted this question on the web.py Google group, got no answer yet.)

Can you show the "View Source" contents of the rendered page? — Andrey Kuzmin
– Andrey Kuzmin, Commented Nov 24, 2011 at 8:08

Andrey Kuzmin · Accepted Answer · 2011-11-24 18:25:39Z

1

You can enable json encoder in template globals, and use it in your javascript code.

import json
template_globals = {"json_encode": json.dumps}
render = web.template.render(config.template_dir, globals=template_globals, base="layout")

Then in your template

<script>
var obj = $:json_encode({"html": getContents('http://mysite.net')});
document.write(obj.html);
</script>

answered Nov 24, 2011 at 18:25

Andrey Kuzmin

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Comments

Andrey Kuzmin · Accepted Answer · 2011-11-24 08:32:32Z

0

Perhaps you have quotes in rendered content, and it invalidates javascript.

answered Nov 24, 2011 at 8:32

Andrey Kuzmin

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5 Comments

Andrey Kuzmin Over a year ago

Why won't you show the source of generated page? It will be easy to see the problem.

Matoe Over a year ago

The source is at pastie.org/2914370; it renders matoe.co.cc/patcher.txt for an test.

Andrey Kuzmin Over a year ago

The problem is that your javascript string is broken by the line breaks.

Matoe Over a year ago

So is there a way to escape \n instead of NEWLINE? (You're right :))

Andrey Kuzmin Over a year ago

Check my second answer, just use json.dumps to properly encode string for javascript. You then won't have to worry about quotes or newlines, etc.

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