4. UIFlow 2.0.1 HTTP GET and parse JSON

UIFlow 2.0.1 HTTP GET and parse JSON

  • S

    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")```
    0

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

    0
  • S

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

    0