Tiny WebServer crashes after some hours

M5StickFreakler

Hi folks

I have the problem, that the following code (it's a tiny web server) crashes after some hours.
I don't know what the problem exactly is, but it is not reachable after some hours of perfect running.
The label "labelWebServer" does show "RUNS", but I get a "ERR_CONNECTION_TIMED_OUT" because the server does not response anymore until I restart the device.

You can call the tiny web server like:
http://{IpAddress}/api/v1.0/level

Does anyone have a idea, what I am doing wrong?

Annotation: It is one of 2 threads. My second thread reads out some sensors and calculates the "level". The second thread is working like a charm.

Code Example: Tiny Web Server

from m5stack import *`
from m5ui import *
from uiflow import *
import random
import unit
import wifiCfg
import socket
import _thread as th

setScreenColor(0x000000)

labelWebServer = M5TextBox(240, 20, "WS", lcd.FONT_Default,0xFFFFFF, rotate=0)
labelIpAddress = M5TextBox(300, 170, "xxx.xxx.xxx.xxx", lcd.FONT_Default,0xFFFFFF, rotate=270)
levelPercent = 100

wifiCfg.screenShow()
wifiCfg.autoConnect(lcdShow = True)

def webServer():

  global levelPercent

  ip = wifiCfg.wlan_sta.ifconfig()
  server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
  server.bind((ip[0], 80))
  server.listen(1)

  web_response_json = """{"data":{"deviceName":"BlablaLevel","deviceId": "BlablablaWhatever","value": @value@,"unit": "@unit@"}}"""

  web_error_404 = """<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL was not found on this server.</p></body></html>"""

  response = None

  while True:

    try:

      labelIpAddress.setText('')
      labelIpAddress.setText('IP ' + wifiCfg.wlan_sta.ifconfig()[0])

      if not wifiCfg.wlan_sta.isconnected():
        labelWebServer.setText('WS: RECON')
        wifiCfg.reconnect()

      labelWebServer.setText('WS: RUNS')
      
      conn, addr = server.accept()
      request = conn.recv(1024)
      request = str(request)

      isRequestLevel = request.find('/api/v1.0/level ') >= 0
  
      if isRequestLevel :
        labelWebServer.setText('WS: 200')
        json = web_response_json
        json = json.replace('@value@', str(("%.2f"%(levelPercent))))
        json = json.replace('@unit@', '%')
        response = json
        conn.send('HTTP/1.1 200 OK\r\n')
        conn.send('Content-Type: application/json\r\n')
        conn.send('Connection: close\r\n\r\n')
      else :
        labelWebServer.setText('WS: 404')
        response = web_error_404
        conn.send('HTTP/1.1 404 NOT FOUND\r\n')
        conn.send('Content-Type: text/html\r\n')
        conn.send('Connection: close\r\n\r\n')

      conn.sendall(response)
    
    except Exception as e:
      labelWebServer.setText('WS: ERR')

    finally:
      try:
        conn.close()
      except Exception as e:
        labelWebServer.setText('WS: ERR')


th.start_new_thread(webServer, ())

M5StickFreakler

I am experimenting with this code. Maybe it helps....

server.settimeout(30)

# ========================================
# WEB SERVER
# ========================================
def webServer():

    global levelPercent, setupMode

    web_response_json = """{"data":{"deviceName":"blablabla","deviceId": "blablabla","value": @value@,"unit": "@unit@"}}"""

    web_error_404 = """<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL was not found on this server.</p></body></html>"""

    while True:

        try:

            labelIpAddress.setText('')

            if not wifiCfg.wlan_sta.isconnected():
                labelWebServer.setText('WS: RECON')
                wifiCfg.reconnect()
            else:
                ip = wifiCfg.wlan_sta.ifconfig()
                labelIpAddress.setText('IP ' + wifiCfg.wlan_sta.ifconfig()[0])
                
                server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
                server.settimeout(30)
                server.bind((ip[0], 80))
                server.listen(1)
            
                labelWebServer.setText('WS: RUNS')

                (conn, addr) = server.accept()
                request = conn.recv(1024)
                
                if request:
                  request = str(request)
  
                  isRequestLevel = request.find('/api/v1.0/level ') >= 0
  
                  if isRequestLevel:
                      labelWebServer.setText('WS: 200')
                      json = web_response_json
                      json = json.replace('@value@', str('%.2f'
                              % levelPercent))
                      json = json.replace('@unit@', '%')
                      response = json
                      conn.send('HTTP/1.1 200 OK\r\n')
                      conn.send('Content-Type: application/json\r\n')
                      conn.send('Connection: close\r\n\r\n')
                  else:
                      labelWebServer.setText('WS: 404')
                      response = web_error_404
                      conn.send('HTTP/1.1 404 NOT FOUND\r\n')
                      conn.send('Content-Type: text/html\r\n')
                      conn.send('Connection: close\r\n\r\n')
  
                  conn.sendall(response)

        except Exception as e:
            gc.collect()
            labelWebServer.setText('WS: ERR')

        finally:
            try:
                conn.close()
                server.close()
            except Exception as e:
                pass
            finally:
                pass

lukasmaximus

I also had the same issue, or that it would crash after pressing a html button too many times. I never found the reason why

M5StickFreakler

@lukasmaximus said in Tiny WebServer crashes after some hours:

I also had the same issue, or that it would crash after pressing a html button too many times. I never found the reason why

In my opinion the problem is my code line request = conn.recv(1024)

If the connection fails, the program never will com back here to life. So my code fragment to reconnect will never run.
It would help if request = conn.recv(1024) would crash in case of lost connection, so that I can apply code to setup everything new.

M5StickFreakler

@lukasmaximus said in Tiny WebServer crashes after some hours:

I also had the same issue, or that it would crash after pressing a html button too many times. I never found the reason why

Hi Lukas

Look at my solution. It runs since 2 days without a problem. If the socket crashes it will setup again after 30 seconds.
Maybe you can adopt it

# ========================================
# WEB SERVER
# ========================================
def webServer():

    global levelPercent, setupMode

    web_response_json = """{"data":{"deviceName":"blablabla","deviceId": "blablabla","value": @value@,"unit": "@unit@"}}"""

    web_error_404 = """<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL was not found on this server.</p></body></html>"""

    while True:

        try:

            labelIpAddress.setText('')

            if not wifiCfg.wlan_sta.isconnected():
                labelWebServer.setText('WS: RECON')
                wifiCfg.reconnect()
            else:
                ip = wifiCfg.wlan_sta.ifconfig()
                labelIpAddress.setText('IP ' + wifiCfg.wlan_sta.ifconfig()[0])
                
                server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
                server.settimeout(30)
                server.bind((ip[0], 80))
                server.listen(1)
            
                labelWebServer.setText('WS: RUNS')

                (conn, addr) = server.accept()
                request = conn.recv(1024)
                
                if request:
                  request = str(request)
  
                  isRequestLevel = request.find('/api/v1.0/level ') >= 0
  
                  if isRequestLevel:
                      labelWebServer.setText('WS: 200')
                      json = web_response_json
                      json = json.replace('@value@', str('%.2f'
                              % levelPercent))
                      json = json.replace('@unit@', '%')
                      response = json
                      conn.send('HTTP/1.1 200 OK\r\n')
                      conn.send('Content-Type: application/json\r\n')
                      conn.send('Connection: close\r\n\r\n')
                  else:
                      labelWebServer.setText('WS: 404')
                      response = web_error_404
                      conn.send('HTTP/1.1 404 NOT FOUND\r\n')
                      conn.send('Content-Type: text/html\r\n')
                      conn.send('Connection: close\r\n\r\n')
  
                  conn.sendall(response)

        except Exception as e:
            gc.collect()
            labelWebServer.setText('WS: ERR')

        finally:
            try:
                conn.close()
                server.close()
            except Exception as e:
                pass
            finally:
                pass

lukasmaximus

great job