Looking for example of how to via MicroPython set a 'get' request and received the returned results?

[Jibun-no-Kage]

Looking for example of how to via MicroPython set a 'get' request and received the returned results? Basically doing the comparable via curl would be:

# curl --location 'http://localhost:5555/tally/preview' --header 'Authorization: Me'

An example result would be...

{source:1}

I happen to plan to use an ESP32 module with micropython install, not that I believe that should make any difference. Of course I will have to enable WiFi and have a valid connection to the applicable network.

[bidrohini]

You have to use the urequests library. https://makeblock-micropython-api.readthedocs.io/en/latest/public_library/Third-party-libraries/urequests.html

[shariltumin]

You can try this simple script:

import socket, network

# connect to WiFi
ssid, pwd = 'yourssid', 'yourpwd'
network.WLAN(network.AP_IF).active(False)
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, pwd)

# server def
srv = '192.168.4.85' # your http server
port = 5555          # http port 
addr = socket.getaddrinfo(srv, port)[0][-1]
reply = ''

def curl():
    global addr
    s = socket.socket()
    try:
       s.connect(addr)
    except Exception as e:
       print('========================')
       print('Connect exception:', e)
       print('========================')
       s.close()
       del s
       return False
    else:
       return request(s)

def request(s):
    global srv,port
    get = (
    "GET /tally/preview HTTP/1.1\r\n"
    f"Host: {srv}:{port}\r\n"
    "Authorization: Me\r\n"
    "Connection: close\r\n"
    "\r\n"
    )
    try:
       s.sendall(get.encode())
    except Exception as e:
       print('------------------------')
       print('Send exception:', e)
       print('------------------------')
       s.close()
       del s
       return False
    else:
       return get_reply(s)

def get_reply(s):
    global reply
    ok = True
    response = b""
    try:
       while True:
           data = s.recv(4096)
           if not data:
               break
           response += data
       reply = response.decode()
    except Exception as e:
       print('------------------------')
       print('Receive exception:', e)
       print('------------------------')
       ok = False
    s.close()
    del s
    return ok

ok = curl()
if ok: print(reply)

[Jibun-no-Kage]

Trying to use urequests module, how do you structure the parameters to pass authentication which is just a password? The curl example works... but it is what I could call a non-standard authentication header, no?

# curl --location 'http://localhost:5555/tally' --header "Authorization: me"
[{"source": 1, "preview": false, "program": true}, {"source": 2, "preview": true, "program": false}, {"source": 3, "preview": false, "program": false}, {"source": 4, "preview": false, "program": false}, {"source": 5, "preview": false, "program": false}, {"source": 6, "preview": false, "program": false}, {"source": 7, "preview": false, "program": false}, {"source": 8, "preview": false, "program": false}]

# curl -v --location 'http://localhost:5555/tally' --header "Authorization: me"
*   Trying 127.0.0.1:5555...
* Connected to localhost (127.0.0.1) port 5555 (#0)
> GET /tally HTTP/1.1
> Host: localhost:5555
> User-Agent: curl/7.88.1
> Accept: */*
> Authorization: me
>
* HTTP 1.0, assume close after body
< HTTP/1.0 200 OK
< Server: BaseHTTP/0.6 Python/3.11.2
< Date: Sun, 06 Oct 2024 23:41:36 GMT
< Content-type: application/json
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Methods: GET, POST, OPTIONS
< Access-Control-Allow-Headers: Authorization
< Access-Control-Allow-Headers: Content-Type
<
* Closing connection 0
[{"source": 1, "preview": false, "program": true}, {"source": 2, "preview": true, "program": false}, {"source": 3, "preview": false, "program": false}, {"source": 4, "preview": false, "program": false}, {"source": 5, "preview": false, "program": false}, {"source": 6, "preview": false, "program": false}, {"source": 7, "preview": false, "program": false}, {"source": 8, "preview": false, "program": false}]

The following fails...

SERVER = 192.168.1.67
REQUEST = 'http://{}/tally'.format(SERVER)
theData = ujson.dumps({'authentication':'me'})
theResponse = urequests.post(url=REQUEST, headers={'content-type':'application/json'}, data=theData)
print(repr(theResponse))

Above returns...

[Errno 104] ECONNRESET

I have not tried the raw socket example, as yet, wanted to try to urequests.