README_exportDataFromJs

(2019-06-12)

Re: [movsim/traffic-simulation-de] Library / Wrapper for offline use? (#4)
Ran K
12.6.2019 21:13
An  movsim/traffic-simulation-de   Kopie  MTGermany,    Comment  

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Sure!
what I did was basically modifying road.prototype.writeVehicles in road.js so that instead of writing the data to console.log it just sent it to a local endpoint like this: (log is a string which holds a CSV line for each vehicle status)

var url = 'http://localhost:8000';
var xhr = new XMLHttpRequest();
xhr.open('POST', url, false);
xhr.send(log);

Separately, I wrote this basic HTTP server in python which I run locally:

from http.server import HTTPServer, BaseHTTPRequestHandler
from io import BytesIO

class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):

def log_message(self, format, *args):
    return

def do_POST(self):
    content_length = int(self.headers['Content-Length'])
    body = self.rfile.read(content_length).decode("utf-8")
    reader = csv.reader(body.split('\n'), delimiter=',')
    for row in reader:
        print(','.join(row))
    self.send_response(200)
    self.send_header("Content-type", "text/plain")
    self.send_header("Access-Control-Allow-Origin", "*")
    self.end_headers()
    response = BytesIO()
    response.write(b'This is POST request. ')
    response.write(b'Received: ')
    self.wfile.write(response.getvalue())

httpd = HTTPServer(('localhost', 8000), SimpleHTTPRequestHandler)
httpd.serve_forever()

I hope this makes sense... I just used it to export the data so that I can run some computation in python

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