回溯（最近一次调用）：Python

Question

When I am trying to run my python code in eclipse I am getting this error:

Here is my code:

"""
Module Name:  deviceManager.py
Project:      IoTHubRestSample
Copyright (c) Microsoft Corporation.

Using [Device Indentities REST APIs](https://msdn.microsoft.com/en-us/library/azure/mt548489.aspx) to create a new device identity, retrieve a device identity, and list device identities.

This source is subject to the Microsoft Public License.
See http://www.microsoft.com/en-us/openness/licenses.aspx#MPL
All other rights reserved.

THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 
EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
"""

import base64
import hmac
import hashlib
import time
import requests
import urllib

class DeviceManager:
    API_VERSION = '2016-02-03'
    TOKEN_VALID_SECS = 365 * 24 * 60 * 60
    TOKEN_FORMAT = 'SharedAccessSignature sr=%s&sig=%s&se=%s&skn=%s'

    def __init__(self, connectionString=None):
        if connectionString != None:
            iotHost, keyName, keyValue = [sub[sub.index('=') + 1:] for sub in connectionString.split(";")]
            self.iotHost = iotHost
            self.keyName = keyName
            self.keyValue = keyValue

    def _buildExpiryOn(self):
        return '%d' % (time.time() + self.TOKEN_VALID_SECS)

    def _buildSasToken(self):
        targetUri = self.iotHost.lower()
        expiryTime = self._buildExpiryOn()
        toSign = '%s\n%s' % (targetUri, expiryTime)
        key = base64.b64decode(self.keyValue.encode('utf-8'))
        signature = urllib.quote(
            base64.b64encode(
                hmac.HMAC(key, toSign.encode('utf-8'), hashlib.sha256).digest()
                )
        ).replace('/', '%2F')
        return self.TOKEN_FORMAT % (targetUri, signature, expiryTime, self.keyName)

    def createDeviceId(self, deviceId):
        sasToken = self._buildSasToken()
        url = 'https://%s/devices/%s?api-version=%s' % (self.iotHost, deviceId, self.API_VERSION)
        body = '{deviceId: "%s"}' % deviceId
        r = requests.put(url, headers={'Content-Type': 'application/json', 'Authorization': sasToken}, data=body)
        return r.text, r.status_code

    def retrieveDeviceId(self, deviceId):
        sasToken = self._buildSasToken()
        url = 'https://%s/devices/%s?api-version=%s' % (self.iotHost, deviceId, self.API_VERSION)
        r = requests.get(url, headers={'Content-Type': 'application/json', 'Authorization': sasToken})
        return r.text, r.status_code

    def listDeviceIds(self, top=None):
        if top == None:
            top = 1000
        sasToken = self._buildSasToken()
        url = 'https://%s/devices?top=%d&api-version=%s' % (self.iotHost, top, self.API_VERSION)
        r = requests.get(url, headers={'Content-Type': 'application/json', 'Authorization': sasToken})
        return r.text, r.status_code

    def deleteDeviceId(self, deviceId):
        sasToken = self._buildSasToken()
        url = 'https://%s/devices/%s?api-version=%s' % (self.iotHost, deviceId, self.API_VERSION)
        r = requests.delete(url, headers={'Content-Type': 'application/json', 'Authorization': sasToken, 'If-Match': '*' }) 
        # If-Match Etag, but if * is used, no need to precise the Etag of the device. The Etag of the device can be seen in the header requests.text response 
        return r.text, r.status_code

if __name__ == '__main__':
    connectionString = 'HostName=<iot-hub-name>.azure-devices.net;SharedAccessKeyName=iothubowner;SharedAccessKey=<iothubowner-policy-key>'
    dm = DeviceManager(connectionString)
    deviceId='iotdevice1'
    print(dm.createDeviceId(deviceId))
    print(dm.retrieveDeviceId(deviceId))
    print(dm.listDeviceIds())

How to fix this?

Answer 1

It seems that your linking code is an Azure code sample written by me, which comes from here and its introduction at here . According to your error screenshot, I see the code connectionString = 'HostName=<iot-hub-name>.azure-devices.net;SharedAccessKeyName=iothubowner;SharedAccessKey=<iothubowner-policy-key>' was not changed. Please follow the offical tutorial Create an IoT hub using the Azure portal to create an IoTHub if you had not, and copy your IoT hub name & key(as below) instead of <iot-hub-name> & <iothubowner-policy-key> .