使用 MATLAB 查询数据

  • 项目

MATLAB 是一个编程和数值计算平台，用于分析数据、开发算法和创建模型。 本文介绍如何在适用于 Azure 数据资源管理器的 MATLAB 中获取授权令牌，以妨如何使用此令牌与群集进行交互。

先决条件

选择用于运行 MATLAB 的操作系统的选项卡。

  1. 从 NuGet 下载 Microsoft Identity 客户端和 Microsoft Identity 抽象包。

  2. 从 lib\net45 中将下载的包和 DLL 文件提取到所选文件夹中。 在本文中，我们将会使用文件夹“C:\Matlab\DLL”。

执行用户身份验证

执行用户身份验证时，系统会提示用户通过浏览器窗口登录。 成功登录后，将授予用户授权令牌。 本部分介绍如何配置此交互式登录流。

若要执行用户身份验证，请执行以下操作：

  1. 定义授权所需的常数。 有关这些值的详细信息，请参阅授权参数。

    % The Azure Data Explorer cluster URL
clusterUrl = 'https://<adx-cluster>.kusto.chinacloudapi.cn';
% The Azure AD tenant ID
tenantId = '';
% Send a request to https://<adx-cluster>.kusto.chinacloudapi.cn/v1/rest/auth/metadata
% The appId should be the value of KustoClientAppId
appId = '';
% The Azure AD scopes
scopesToUse = strcat(clusterUrl,'/.default ');

  2. 在 MATLAB 工作室中，加载提取的 DLL 文件：

    % Access the folder that contains the DLL files
dllFolder = fullfile("C:","Matlab","DLL");

% Load the referenced assemblies in the MATLAB session
matlabDllFiles = dir(fullfile(dllFolder,'*.dll'));
for k = 1:length(matlabDllFiles)
    baseFileName = matlabDllFiles(k).name;
    fullFileName = fullfile(dllFolder,baseFileName);
    fprintf(1, 'Reading  %s\n', fullFileName);
end
    % Load the downloaded assembly in MATLAB
    NET.addAssembly(fullFileName);

  3. 使用 PublicClientApplicationBuilder 提示用户进行交互式登录：

    % Create an PublicClientApplicationBuilder
app = Microsoft.Identity.Client.PublicClientApplicationBuilder.Create(appId)...
    .WithAuthority(Microsoft.Identity.Client.AzureCloudInstance.AzurePublic,tenantId)...
    .WithRedirectUri('http://localhost:8675')...
    .Build();

% System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
NET.setStaticProperty ('System.Net.ServicePointManager.SecurityProtocol',System.Net.SecurityProtocolType.Tls12)
% Start with creating a list of scopes
scopes = NET.createGeneric('System.Collections.Generic.List',{'System.String'});
% Add the actual scopes
scopes.Add(scopesToUse);
fprintf(1, 'Using appScope  %s\n', scopesToUse);

% Get the token from the service
% and show the interactive dialog in which the user can login
tokenAcquirer = app.AcquireTokenInteractive(scopes);
result = tokenAcquirer.ExecuteAsync;

% Extract the token and when it expires
% and retrieve the returned token
token = char(result.Result.AccessToken);
fprintf(2, 'User token aquired and will expire at %s & extended expires at %s', result.Result.ExpiresOn.LocalDateTime.ToString,result.Result.ExtendedExpiresOn.ToLocalTime.ToString);

  4. 使用授权令牌通过 REST API 查询群集：

    options=weboptions('HeaderFields',{'RequestMethod','POST';'Accept' 'application/json';'Authorization' ['Bearer ', token]; 'Content-Type' 'application/json; charset=utf-8'; 'Connection' 'Keep-Alive'; 'x-ms-app' 'Matlab'; 'x-ms-client-request-id' 'Matlab-Query-Request'});

% The DB and KQL variables represent the database and query to execute
querydata = struct('db', "<DB>", 'csl', "<KQL>");
querryresults  = webwrite("https://sdktestcluster.chinaeast2.dev.kusto.chinacloudapi.cn/v2/rest/query", querydata, options);

% Extract the results row
results=querryresults{3}.Rows

执行应用程序身份验证

Microsoft Entra 应用程序授权可用于不需要交互式登录且需要自动运行的情况。

若要执行应用程序身份验证，请执行以下操作：

  1. 预配 Microsoft Entra 应用程序。 在“重定向 URI”处，选择“Web”，在 URI 处输入“http://localhost:8675”。

  2. 定义授权所需的常数。 有关这些值的详细信息，请参阅授权参数。

    % The Azure Data Explorer cluster URL
clusterUrl = 'https://<adx-cluster>.kusto.chinacloudapi.cn';
% The Azure AD tenant ID
tenantId = '';
% The Azure AD application ID and key
appId = '';
appSecret = '';

  3. 在 MATLAB 工作室中，加载提取的 DLL 文件：

     % Access the folder that contains the DLL files
 dllFolder = fullfile("C:","Matlab","DLL");

 % Load the referenced assemblies in the MATLAB session
 matlabDllFiles = dir(fullfile(dllFolder,'*.dll'));
 for k = 1:length(matlabDllFiles)
     baseFileName = matlabDllFiles(k).name;
     fullFileName = fullfile(dllFolder,baseFileName);
     fprintf(1, 'Reading  %s\n', fullFileName);
 end
     % Load the downloaded assembly
     NET.addAssembly(fullFileName);

  4. 使用 ConfidentialClientApplicationBuilder 对 Microsoft Entra 应用程序执行非交互式自动登录：

    %  Create an ConfidentialClientApplicationBuilder
app = Microsoft.Identity.Client.ConfidentialClientApplicationBuilder.Create(appId)...
    .WithAuthority(Microsoft.Identity.Client.AzureCloudInstance.AzurePublic,tenantId)...
    .WithRedirectUri('http://localhost:8675')...
    .WithClientSecret(appSecret)...
    .Build();

% System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
NET.setStaticProperty ('System.Net.ServicePointManager.SecurityProtocol',System.Net.SecurityProtocolType.Tls12)
% Start with creating a list of scopes
scopes = NET.createGeneric('System.Collections.Generic.List',{'System.String'});
% Add the actual scopes
scopes.Add(scopesToUse);
fprintf(1, 'Using appScope  %s\n', scopesToUse);

% Get the token from the service and cache it until it expires
tokenAcquirer = app.AcquireTokenForClient(scopes);
result = tokenAcquirer.ExecuteAsync;

% Extract the token and when it expires
% retrieve the returned token
token = char(result.Result.AccessToken);
fprintf(2, 'User token aquired and will expire at %s & extended expires at %s', result.Result.ExpiresOn.LocalDateTime.ToString,result.Result.ExtendedExpiresOn.ToLocalTime.ToString);

  5. 使用授权令牌通过 REST API 查询群集：

    options=weboptions('HeaderFields',{'RequestMethod','POST';'Accept' 'application/json';'Authorization' ['Bearer ', token]; 'Content-Type' 'application/json; charset=utf-8'; 'Connection' 'Keep-Alive'; 'x-ms-app' 'Matlab'; 'x-ms-client-request-id' 'Matlab-Query-Request'});

% The DB and KQL variables represent the database and query to execute
querydata = struct('db', "<DB>", 'csl', "<KQL>");
querryresults  = webwrite("https://sdktestcluster.chinaeast2.dev.kusto.chinacloudapi.cn/v2/rest/query", querydata, options);

% Extract the results row
results=querryresults{3}.Rows

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