Azure EventHub，无法订阅接收答案

【问题标题】：Azure EventHub, unable to subscribe for ReceivingAzure EventHub，无法订阅接收
【发布时间】：2016-05-28 05:24:34
【问题描述】：

我尝试通过 Python 从 Azure EventHub 接收消息，但遗憾的是我无法订阅它。

我的脚本基于https://gist.github.com/tomconte/e2a4667185a9bf674f59 并且已经在python script which subscribes/listens to Azure Event Hub? 中提出了另一个类似的问题，不幸的是没有解决它。

到我的设置： Python 2.7.9 (Ubuntu 15.04)

通过 pip 安装 qpid-proton：

pip show python-qpid-proton
...
Version: 0.11.1
...

所以我正在尝试以下方法：

from proton import *
import urllib
key = urllib.quote(FOOBAR,"")
address = "amqps://name:" + key + "@nsname.servicebus.windows.net/eventhubname/ConsumerGroups/$Default/Partitions/0"
messenger = Messenger()
messenger.subscribe(address)

proton.MessengerException: Cannot subscribe to [ADDRESS]

name/key 应该没问题，因为它可以在另一个应用程序中使用。

有什么猜测吗？

【问题讨论】：

嗨，似乎没有必要对密钥进行编码。请尝试使用 Azure 门户中的原始密钥。任何结果，请告诉我。
感谢您的回复。尝试不编码密钥但也失败了。在我的密钥中有一个“/”导致连接失败：proton.MessengerException: [-2]: CONNECTION ERROR (name:KeyUntilSlash): getaddrinfo(name, KeyUntilSlash): Servname not supported for ai_socktype 其中 KeyuntilSlash 是密钥的第一部分，不包括“/”

标签： python azure amqp qpid azure-eventhub

【解决方案1】：

您的密钥看起来可能包含“/”，因此您可能需要转到 azure 门户，看看是否可以改用辅助密钥。您可能需要创建一个新的“共享访问策略”

key shared access policy

【讨论】：

【解决方案2】：

另一种选择是使用最新的 azure-eventhub Python SDK 从事件中心接收消息。

azure-eventhub 在 pypi 上可用：https://pypi.org/project/azure-eventhub/

您可以关注receive sample code接收消息：

#!/usr/bin/env python

# --------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for license information.
# --------------------------------------------------------------------------------------------

"""
An example to show receiving events from an Event Hub.
"""
import os
from azure.eventhub import EventHubConsumerClient

CONNECTION_STR = os.environ["EVENT_HUB_CONN_STR"]
EVENTHUB_NAME = os.environ['EVENT_HUB_NAME']


def on_event(partition_context, event):
    # Put your code here.
    # If the operation is i/o intensive, multi-thread will have better performance.
    print("Received event from partition: {}.".format(partition_context.partition_id))


def on_partition_initialize(partition_context):
    # Put your code here.
    print("Partition: {} has been initialized.".format(partition_context.partition_id))


def on_partition_close(partition_context, reason):
    # Put your code here.
    print("Partition: {} has been closed, reason for closing: {}.".format(
        partition_context.partition_id,
        reason
    ))


def on_error(partition_context, error):
    # Put your code here. partition_context can be None in the on_error callback.
    if partition_context:
        print("An exception: {} occurred during receiving from Partition: {}.".format(
            partition_context.partition_id,
            error
        ))
    else:
        print("An exception: {} occurred during the load balance process.".format(error))


if __name__ == '__main__':
    consumer_client = EventHubConsumerClient.from_connection_string(
        conn_str=CONNECTION_STR,
        consumer_group='$Default',
        eventhub_name=EVENTHUB_NAME,
    )

    try:
        with consumer_client:
            consumer_client.receive(
                on_event=on_event,
                on_partition_initialize=on_partition_initialize,
                on_partition_close=on_partition_close,
                on_error=on_error,
                starting_position="-1",  # "-1" is from the beginning of the partition.
            )
    except KeyboardInterrupt:
        print('Stopped receiving.')

【讨论】：