Perhaps you just need to set the 'Access-Control-Allow-Origin' header?
Something like this might work:
# Import necessary files
import serial
from twisted.web.resource import Resource
# Setup Arduino at correct speed
try:
arduino = serial.Serial('/dev/ttyACM0', 9600)
except:
arduino = serial.Serial('/dev/ttyACM1', 9600)
class MoveServo(Resource):
isLeaf = True
permitted_origins = ('http://192.168.1.122:9000',)
def render_GET(self,request):
if origin in (self.permitted_origins):
request.setHeader('Access-Control-Allow-Origin', origin)
try:
# Send value over serial to the Arduino
arduino.write(request.args['value'][0])
return 'Success'
except:
return 'Failure'
resource = MoveServo()
On 27 August 2017 at 17:10, Deve Krehbiel <d...@speedprint.com> wrote:
> First post so forgive me if I am not explaining this right.
>
> I am trying to make a baby cam and then heavily document it for everyone
> to have access to. I am using a Raspberry Pi with Rasbian. I am using
> mjpg-streamer for the streaming with no problems.
>
> The problem is I am also using two servos for pan and tilt. To accomplish
> this I am using an Arduino Uno. This is so I can add IR lighting for night
> vision, etc later. I am not a programmer so this is getting frustrating
> after a few weeks of failure.
>
> How is it failing you might ask..well, its working perfectly with only ONE
> exception:
> Every time I push the button for left/right/up/down I get this:
>
> XMLHttpRequest cannot load http://192.168.1.122:81/servos.rpy?value=100P.
> No 'Access-Control-Allow-Origin' header is present on the requested
> resource. Origin 'http://192.168.1.122:9000' is therefore not allowed
> access.
>
> On the local area network, it still works, but taking it to the internet
> it does not.
>
> Here are the two programs that make this happen. One is servos.rpy and the
> other is the supporting HTML/Get script;
> ****
> servos.rpy
> -----------------------------------
> # Import necessary files
> import serial
> from twisted.web.resource import Resource
> # Setup Arduino at correct speed
> try:
> arduino = serial.Serial('/dev/ttyACM0', 9600)
> except:
> arduino = serial.Serial('/dev/ttyACM1', 9600)
>
> class MoveServo(Resource):
> isLeaf = True
> def render_GET(self,request):
> try:
> # Send value over serial to the Arduino
> arduino.write(request.args['value'][0])
> return 'Success'
> except:
> return 'Failure'
>
> resource = MoveServo()
> ***
>
> Now for the HTML/Get script:
>
> **
> <!doctype html>
> <html>
> <head>
> <title>Make Use Of DIY Security Camera</title>
> <style type="text/css">
> #container {
> /* center the content */
> margin: 0 auto;
> text-align: center;
> }
> </style>
> </head>
> <body>
> <div id="container">
> <img src="/?action=stream" /><br>
> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/
> jquery.min.js"></script><br />
> <button onclick="servos.move('P', 10)">Left</button>
> <button onclick="servos.move('P', -10)">Right</button>
> <button onclick="servos.move('T', -10)">Down</button>
> <button onclick="servos.move('T', 10)">Up</button>
> </div>
> </body>
> <script>
> var servos;
> $( document ).ready(function() {
> servos = moveServos();
> });
> function moveServos() {
> // Store some settings, adjust to suit
> var panPos = 70,
> tiltPos = 90,
> tiltMax = 170,
> tiltMin = 45,
> panMax = 170,
> panMin = 20;
> return {
> move:function(servo, adjustment) {
> var value;
> if(servo == 'P') {
> if(!((panPos >= panMax && adjustment > 0) || (panPos <= panMin &&
> adjustment < 0))) {
> // Still within allowed range, "schedule" the movement
> panPos += adjustment;
> }
> value = panPos + 'P';
> }
> else if(servo == 'T') {
> if(!((tiltPos >= tiltMax && adjustment > 0) || (tiltPos <= tiltMin &&
> adjustment < 0))) {
> // Still within allowed range, "schedule" the movement
> tiltPos += adjustment;
> }
> value = tiltPos + 'T';
> }
> // Use AJAX to actually move the servo
> $.get('http://192.168.1.122:81/servos.rpy?value=' + value);
> },
> }
> }
> </script>
> </html>
>
> *****
> Twisted is started: sudo twistd -n web -p 81 --path /usr/local/www/
>
> I would be forever grateful if someone could take a serious look at this
> and tell me where I am going wrong. Once this is fixed, I can start
> documenting the entire system for everyone. Thank you!
>
> Deve
>
> _______________________________________________
> Twisted-web mailing list
> Twisted-web@twistedmatrix.com
> https://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web
>
>
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