UIFlow 2.0.1 HTTP GET and parse JSON

streammyevent

Hi team,

I'm trying to complete the simplest of all possible projects, and for the life of me after two days of troubleshooting I simply can't figure it out.

Device: Core2
OS: Mac OS 14.2.1
Software: UIFlow v2.0.1

I'm trying to HTTP GET a local JSON endpoint with some data.

I started off trying to program this with the visual interface, but found that I quickly had to switch to python because of the missing 'urequests' lib (there's another thread about that on this forum).

Using the 'requests' library, I found that I can perform the GET request and actually get a 200 status OK back. However, when using the response.json() call, the program hangs with no error and no output.

If I run the same requests in python3 on my desktop environment, it all works.

Here's where I got to:

import os, sys, io
import M5
from M5 import *
import network
import requests

title0 = None
statTitle = None
resTitle = None
stat = None
res = None
# http_req = None
wlan = None


status = None

def setup():
  global title0, statTitle, resTitle, stat, res, http_req, wlan, status

  M5.begin()
  Widgets.fillScreen(0x222222)
  title0 = Widgets.Title("Powermonitor", 3, 0xffffff, 0x0000FF, Widgets.FONTS.DejaVu18)
  statTitle = Widgets.Label("Status:", 2, 28, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
  resTitle = Widgets.Label("Response:", 2, 57, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
  stat = Widgets.Label("...", 110, 29, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
  res = Widgets.Label("...", 111, 57, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)

  stat.setText(str('Fetching'))
  http_req = requests.get('http://192.168.10.22/api/v1/data')
  status = http_req.status_code
  stat.setText(str(status))
  print(str(http_req.status_code))
  print(str(http_req.reason))
  print(str(http_req.encoding))
  # print(str(http_req.raw))
  # print(str(http_req.text()))
  data = http_req.json()
  print(str(data))
  # print(str(http_req.json()))
  # http_req.close()
  # print(dir(responseJson))
  # print(responseJson())
  # res.setText(str(http_req.json()))


def loop():
  global title0, statTitle, resTitle, stat, res, http_req, wlan, status
  M5.update()


if __name__ == '__main__':
  try:
    setup()
    while True:
      loop()
  except (Exception, KeyboardInterrupt) as e:
    try:
      from utility import print_error_msg
      print_error_msg(e)
    except ImportError:
      print("please update to latest firmware")```

ajb2k3

Are you sure its hanging and not taking ages to get a response?

streammyevent

Yes, the endpoint responds almost instantly. Also the status code immediately comes back as as '200'.