Python open browser and run javascript function

Question

I have a question about python and javascript. I like to create a file who comminicate with javascript webpage.

First i will create a Python file who will open a local webpage. This example localhost/test.html This page is a themplate page. The code is

<html><head><title>An example application</title></head>
<script>
function myFunction()
{
alert("Hello! I am an alert box!");
}
</script>
    <body>
    <h1 class="content">This is my sample application</h1>
    Put the content here...
    <hr>
    <a href="/exit">Quit</a>
    </body></html>

Whene everything is loaded and displayed the python file will activate the javascript function "myFunction()"

How do I do that? I am running Debian and have installed Python and Chromium.

I deleted the webbrowser-control tag, ActiveX is not a realistic outside of Windows. — Quentin, Oct 09 '12 at 10:46
can you give more background on this question? Why do you need browseer and not V8 binding? — Marat, Oct 09 '12 at 13:55
Allright: I have a raspberry pi with a NFc reader connection. I have a browser. Chromium in this case. The pythonscript communicate with the NFc reader. I this case it use the python-pyscard library. When i use my NFc card the python script need to access the browser. It will execute a javascipt what i need to use for this webpage — Wouter van Reeven, Oct 09 '12 at 14:35

score 5 · Answer 1 · answered Oct 09 '12 at 10:45

5

You need a library to allow interaction between the browser and the program.

Options include Selenium and Ghost.

answered Oct 09 '12 at 10:45

Quentin

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I am using raspberry pi. I really like Selenium because you can run chrome as kiosk mode. But there is no way i could install the chrome web browser. I can use java, but it is to heavy I think to run on a raspberry pi – Wouter van Reeven Oct 09 '12 at 13:34

score 0 · Answer 2 · answered Oct 09 '12 at 10:55

0

Have you looked at the webbrowser module ? It can be used to display your webpage. It can not call your js function, but perhaps that one can be triggered from the ready() event in the html?

answered Oct 09 '12 at 10:55

Pengman

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12

I is easy to run a webbrowser in debian put i need tot communicate with hardware. That's way the javascript function is really important – Wouter van Reeven Oct 09 '12 at 13:35
ok. I though the problem was showing a website and triggering a function, after the python was done doing something. – Pengman Oct 10 '12 at 12:14

TVK · Answer 3 · 2019-05-10T07:17:15.247

You could open the website from python using webbroser module with an url parameter containing your javascript code.

in your example

import webbrowser
webbrowser.open('http://localhost/test.html' + '?script=myFunction();')

Then you can read the url paramater in your javascript and execute it via eval

<script>
    window.onload = function () {
        var url = new URL(window.location.href);
        var script = url.searchParams.get("script");
        console.log(script);
        eval(script)
    }    
</script>

Please be aware, that this is only suitable for testing or developing purposes and must not be used in production since using eval like this is dangerous.

Python open browser and run javascript function

3 Answers3

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