1  import board
 2  import busio
 3  from digitalio import DigitalInOut
 4  from adafruit_wiznet5k.adafruit_wiznet5k import WIZNET5K
 5  import adafruit_wiznet5k.adafruit_wiznet5k_socket as socket
 6  import adafruit_requests as requests
 7  
 8  cs = DigitalInOut(board.D10)
 9  spi_bus = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
10  
11  # Initialize ethernet interface with DHCP
12  eth = WIZNET5K(spi_bus, cs)
13  
14  # Initialize a requests object with a socket and ethernet interface
15  requests.set_socket(socket, eth)
16  
17  JSON_GET_URL = "http://httpbin.org/get"
18  
19  attempts = 3  # Number of attempts to retry each request
20  failure_count = 0
21  response = None
22  
23  # Define a custom header as a dict.
24  headers = {"user-agent": "blinka/1.0.0"}
25  
26  print("Fetching JSON data from %s..." % JSON_GET_URL)
27  while not response:
28      try:
29          response = requests.get(JSON_GET_URL, headers=headers)
30          failure_count = 0
31      except AssertionError as error:
32          print("Request failed, retrying...\n", error)
33          failure_count += 1
34          if failure_count >= attempts:
35              raise AssertionError(
36                  "Failed to resolve hostname, \
37                                    please check your router's DNS configuration."
38              ) from error
39          continue
40  print("-" * 60)
41  
42  json_data = response.json()
43  headers = json_data["headers"]
44  print("Response's Custom User-Agent Header: {0}".format(headers["User-Agent"]))
45  print("-" * 60)
46  
47  # Read Response's HTTP status code
48  print("Response HTTP Status Code: ", response.status_code)
49  print("-" * 60)
50  
51  # Read Response, as raw bytes instead of pretty text
52  print("Raw Response: ", response.content)
53  
54  # Close, delete and collect the response data
55  response.close()