Return value from python script via CGI

Question

I work on a raspberry Pi. I did a small html page with 2 buttons calling executables via CGI and doing things. I would like to add a temperature display on the same page.

I have a small python script that reads the temperature of a sensor and I can successfully display it on console or via direct CGI (typing the url, the only thing displayed is the temperature). I would like to see the temperature directly on my html page, and be able to refresh the value by clicking a button.

I can't find any answer that might help me returning a value from the python script and displaying it in a textbox or something. Do you have any track for me to follow ?

A simple way is to make your CGI re-write the whole HTML page with the updated data. — PM 2Ring
– PM 2Ring, Commented Jul 29, 2016 at 11:16
normally you are better off with using WSGI instead of CGI - also frameworks like cherrypy or bottle make things easier — janbrohl
– janbrohl, Commented Jul 29, 2016 at 11:59

janbrohl · Accepted Answer · 2016-07-29 12:04:08Z

0

You can write out a complete html page with CGI

A simple CGI script would be

temp=100
print("Content-Type: text/html")    # HTML is following
print()                             # blank line, end of headers
print("<!doctype html>")
print("<html><head><title>Example</title></head><body>")
print("<p>Temperature is:",temp)
print("</p>")
peint('<a href="#">Reload<a>')
print("</body></html>")

you can also use javascript in a page to (re)load the value with Ajax - there are examples on the page (only replace the php-script with your python-cgi)

edited Jul 29, 2016 at 12:04

answered Jul 29, 2016 at 11:19

janbrohl

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