Power BI 查询连接到使用 HMAC 身份验证的 API

Question

我是 power bi 新手，我需要使用 HMAC 身份验证连接到网络 API。如何通过网络请求发送 HMAC auth headers？或者如何在 PowerBi 查询中进行 HMAC 加密

提前致谢

Answer 1

使用 Power BI 连接器，您可以使用 Crypto.CreateHmac 函数并创建 HMAC 身份验证 headers

https://www.sqlgene.com/2019/02/19/create-a-power-query-custom-data-connector-in-10-minutes

Answer 2

最近我为使用 oAuth2 API 的客户收集了数据。您可以使用 Power/M 查询连接到任何 API。以下是我的案例的示例代码，在第一部分中我收集了 access_token，在第二步中，我使用该访问令牌收集了数据。希望这会给您一些使用 Power Query 连接到任何 API 的想法。

let
    url = "your_authentication_url_here",

    body  = "{ ""client_id"": ""****"",  ""client_secret"": ""****"", ""grant_type"": ""****"", ""audience"":""****""}",
    tokenResponse = Json.Document(Web.Contents(url,[Headers = [#"Content-Type"="application/json"], Content = Text.ToBinary(body) ] )),
    AccessToken = tokenResponse[access_token],
    AccessTokenHeader = "Bearer " & AccessToken,


    data_url = "your_main_url_here",
    data_body = "{
                    ""authorization"": """& AccessTokenHeader & """,
                    ""content-type"": ""application/json""
                }",

    GetGroups = Json.Document(
        Web.Contents(
            data_url, 
            [
                Headers = Json.Document(data_body)
            ] 
        )
    ),    

    categories = GetGroups[categories], --Category here will be changed as per your retrned data

    #"Converted to Table" = Table.FromList(categories, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Expanded Column1" = Table.ExpandRecordColumn
    (
        #"Converted to Table", "Column1", 
        {"ext_id", "shared", "report", "query", "_id", "description"}, --This is column returned from your data set
        {"ext_id", "shared", "report", "query", "_id", "description"}  -- Rename columns accordingly
    )
in
    #"Expanded Column1"

Power BI 查询连接到使用 HMAC 身份验证的 API

Power BI query Connecting to API that uses HMAC Authentication

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