带3个参数的Crypto.CreateHmac函数

问题描述

我正在尝试连接到在Power BI中使用HMAC-SHA256哈希（https://apidocs.unleashedsoftware.com/AuthenticationHelp）的API。我发现，要执行此操作，我需要在Visual Studio中下载数据连接器项目SDK，并在M内使用名为crypto.createhmac（https://nodejs.org/api/crypto.html）的node.js函数。但是，当我在数据连接器代码中使用此函数时，它要求的是第三个参数“ value as binary”，但这不在node.js文档中。下面是我最终将在Power BI中使用的数据连接器的代码。

section TripPin;

[DataSource.Kind="TripPin",Publish="TripPin.Publish"]
shared TripPin.Feed = Value.ReplaceType(TripPinImpl,type function (url as Uri.Type) as any);

TripPinImpl = (url as text) =>
    let
        source = Web.Contents(url,[ Headers = DefaultRequestHeaders ]),json = Json.Document(source)
    in
        json;

DefaultRequestHeaders = [
    #"Accept" = "application/json",// column name and values only
    #"Content-Type" = "application/json",// we only support v4
    #"api-auth-id" = "my-api-id",#"api-auth-signature" = Crypto.CreateHmac(CryptoAlgorithm.SHA256,"my-api-key",**3rd argument (value as binary)**)
];

// Data Source Kind description
TripPin = [
    Authentication = [
        Anonymous = []
    ],Label = "TripPin Part 1 - OData"
];

// Data Source UI publishing description
TripPin.Publish = [
    Beta = true,Category = "Other",ButtonText = { "TripPin OData","TripPin OData" }

解决方法

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