Is there a way to call a program (Python script) from a local HTML page? I have a YUI-colorpicker on that page and need to send its value to a microcontroller via rs232. (There is other stuff than the picker, so I can't code an application instead of an HTML page.)
Later, this will migrate to a server, but I need a fast and easy solution now.
Thanks.
I see now that Daff mentioned the simple HTTP server, but I made an example on how you'd solve your problem (using BaseHTTPServer):
import BaseHTTPServer
HOST_NAME = 'localhost'
PORT_NUMBER = 1337
class MyHandler(BaseHTTPServer.BaseHTTPRequestHandler):
def do_GET(s):
s.send_response(200)
s.send_header('Content-Type', 'text/html')
s.end_headers()
# Get parameters in query.
params = {}
index = s.path.rfind('?')
if index >= 0:
parts = s.path[index + 1:].split('&')
for p in parts:
try:
a, b = p.split('=', 2)
params[a] = b
except:
params[p] = ''
# !!!
# Check if there is a color parameter and send to controller...
if 'color' in params:
print 'Send something to controller...'
# !!!
s.wfile.write('<pre>%s</pre>' % params)
if __name__ == '__main__':
server_class = BaseHTTPServer.HTTPServer
httpd = server_class((HOST_NAME, PORT_NUMBER), MyHandler)
try:
httpd.serve_forever()
except KeyboardInterrupt:
pass
httpd.server_close()
Now, from your JavaScript, you'd call http://localhost:1337/?color=ffaabb
Python has a small built in Web server. If you already already got Python to run with the RS232 you might need to read here on how to set up a very simple and basic webserver. An even easier one can look like this:
import SimpleHTTPServer
import SocketServer
port = 8000
Handler = SimpleHTTPServer.SimpleHTTPRequestHandler
httpd = SocketServer.TCPServer(("", port), Handler)
httpd.serve_forever()
Try so separate you source as good as possible, to that you won't have too much trouble to move it to a production ready Python capable webserver.
If you want an an HTML page to have some sort of server-side programming then you will need a webserver of some sort to do the processing.
My suggestion would be to get a web server running on your development box, or try to accomplish what you need to do with a local desktop application or script.
another quick solution is https://addons.mozilla.org/en-US/firefox/addon/3002 POW, it's a firefox extension that adds a simple web server with Server Side JS built in.
You'd be able to access a command line and call a python script from there.
No you need some kind of server. Wh not try out the portable webservers? You can run them from your usb drive.
Try also XML-RPC it gives you a simple way to pass remote procedure calls from YUI towards a simple XMLRPC server and from that towards your rs232 device
I see no reason why you can't setup a handler for .py/.bat/.vbs files in your browser. This should result in your chosen application running a script when you link to it. This won't work when you migrate to the server but as a testing platform it would work. Just remember to turn it off when you're done or you expose yourself to viruses from other sites.
