AWS IoT Aanalytics的数据获取 [英] Data acquisition of AWS IoT Aanalytics

问题描述

我想通过指定Lambda的IoT Analytics数据集来获取最新数据.

I would like to obtain the latest data by specifying Lambda's IoT Analytics dataset.

如果使用aws sdk的IoTAnalytics的getDatasetContent，将仅返回用于下载文件的链接.数据本身无法获取.

If you use getDatasetContent of IoTAnalytics of aws sdk, only the link for downloading the file will be returned. Data itself can not be acquired.

我想知道如何从Lambda获取有关IoT Analytics数据集的信息.

I would like to know how to obtain information on the IoT Analytics data set from Lambda.

推荐答案

欢迎来到Stack Overflow！

Hi and welcome to Stack Overflow!

如果我正确理解了您的问题，那么您在问如何使用Lambda函数从IoT Analytics数据集中获取数据?

If I understand your question correctly, you are asking how to get the data from an IoT Analytics Dataset using a Lambda function?

您是正确的，get_dataset_content仅返回URI，但是随后很容易获取实际内容，例如在Python中看起来像这样；

You are correct that get_dataset_content only returns the URI, but it is simple to then fetch the actual content, for example in Python it would look like this;

# Code Fragment to retrieve content from IoT Analytics Dataset

iota = boto3.client('iotanalytics')  
response = iota.get_dataset_content(datasetName='my_data_set',versionId='$LATEST')
contentState = response['status']['state']

if (contentState == 'SUCCEEDED') :
    url = response['entries'][0]['dataURI']
    stream = urllib.request.urlopen(url)
    reader = csv.DictReader(codecs.iterdecode(stream, 'utf-8'))

    for record in reader:
        # Process the record as desired, you can refer to columns in the CSV
        # by using record['column_name'] using the DictReader iterator

请注意，这段代码专门使用$ LATEST版本查看最新结果-您也可以查找$ LATEST_SUCCEEDED版本.

Note that this code is specifically looking at the most recent results using the $LATEST version - you can also look for the $LATEST_SUCCEEDED version.

还有更多此处的文档对于Boto-AWS Python SDK，但是您可以在所有其他sdk支持的语言中使用相同的方法.

There's more documentation here for Boto - the AWS Python SDK, but you can use the same approach in all other sdk supported languages.

希望有帮助，罗杰

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