documentation/isystem-connect-api/webserver_8py-example.html

# This script is licensed under BSD License, see file LICENSE.txt, or search for `License` in the SDK online help.

#

# (c) TASKING Germany GmbH, 2023


"""

This script runs a web server, which provides page with target variables

and their values. Real-time access is used when reading variables via

isystem.connect.

"""


import isystem.connect as ic

import sys


winidea_id = ''


if sys.version[0] == '2':

    from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer  # Python 2

elif sys.version[0] == '3':

    from http.server import BaseHTTPRequestHandler, HTTPServer  # Python 3

else:

    raise Exception('unknown version')


# modify this list to add your variables. The same rules as in winIDEA Watch

# window apply. For example, you can use modifier to print values in hex, dec,

# or binary mode:

#   main_loop_counter, h

#   main_loop_counter, d

#   main_loop_counter, b

targetVars = ['main_loop_counter', 'g_char', 'g_int']


def read_vars():

    """

    This function builds contents of a web page, which contains table with

    variables.

    """

    try:  # refresh content every three seconds

        web_str = '<html>\n' + \

                 '<head><meta http-equiv="refresh" content="3"/>\n' + \

                 '  <style>\n' + \

                 '  table, th {\n' \

                 '    border: 2px solid black;\n' + \

                 '    border-collapse: collapse;\n' + \

                 '  }\n' + \

                 '  table, td {\n' \

                 '    border: 1px solid black;\n' + \

                 '    border-collapse: collapse;\n' + \

                 '  }\n' + \

                 '  th, td {\n' + \

                 '    padding: 5px;\n' + \

                 '  }\n' + \

                 '</style>\n' + \

                 '</head><body><code><table><tr><th>Variable</th><th>Value</th></tr>\n'

        for var in targetVars:

            py_var = debugCtrl.evaluate(ic.IConnectDebug.fRealTime, var)

            str_var = py_var.getResult()


            web_str += '<tr><td><b>' + var + '</b></td><td>' + str_var + '</td></tr>\n'


        web_str += '</table></code></body></html>'

    except Exception as ex:

        web_str = str(ex)


    return web_str


class HttpHandler(BaseHTTPRequestHandler):


    def do_GET(self):

        """

        This method processes HTTP request. It always returns

        the same content, regardless of URL.

        """

        try:

            self.send_response(200)

            self.send_header('Content-type', 'text/html')

            self.end_headers()

            lines = read_vars()

            self.wfile.write(lines.encode('utf-8'))

            return

        except IOError:

            self.send_error(404, 'File Not Found: ' + self.path)


def main():

    try:

        server = HTTPServer(('', 8080), HttpHandler)

        print('Http server is running ...')

        server.serve_forever()

    except KeyboardInterrupt:

        print('Ctrl+C received, terminating the server!')

        server.socket.close()


if __name__ == '__main__':

    connectionMgr = ic.ConnectionMgr()

    connectionMgr.connect(ic.CConnectionConfig().instanceId(winidea_id))

    debugCtrl = ic.CDebugFacade(connectionMgr)

    main()