使用 JSON 创建 IAM 托管的策略 - Amazon SDK for .NET
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使用 JSON 创建 IAM 托管的策略

此示例向您演示如何使用Amazon SDK for .NET创建IAM 托管的策略来自 JSON 格式的给定策略文档。应用程序创建 IAM 客户端对象,从文件中读取策略文档,然后创建策略。

注意

有关 JSON 中的示例策略文档,请参阅其他注意事本主题末尾的。

以下各节提供了此示例的片段。这些区域有:例子的完整代码在此之后显示,并且可以按原样构建和运行。

创建 策略

以下代码段使用给定名称和策略文档创建 IAM 托管策略。

的示例本主题末尾的显示了这个片段正在使用中。

// // Method to create an IAM policy from a JSON file private static async Task<CreatePolicyResponse> CreateManagedPolicy( IAmazonIdentityManagementService iamClient, string policyName, string jsonFilename) { return await iamClient.CreatePolicyAsync(new CreatePolicyRequest{ PolicyName = policyName, PolicyDocument = File.ReadAllText(jsonFilename)}); }

代码完成

本节显示了此示例的相关参考和完整代码。

using System; using System.Collections.Generic; using System.IO; using System.Threading.Tasks; using Amazon.IdentityManagement; using Amazon.IdentityManagement.Model; namespace IamCreatePolicyFromJson { // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = // Class to create an IAM policy with a given policy document class Program { private const int MaxArgs = 2; static async Task Main(string[] args) { // Parse the command line and show help if necessary var parsedArgs = CommandLine.Parse(args); if((parsedArgs.Count == 0) || (parsedArgs.Count > MaxArgs)) { PrintHelp(); return; } // Get the application arguments from the parsed list string policyName = CommandLine.GetArgument(parsedArgs, null, "-p", "--policy-name"); string policyFilename = CommandLine.GetArgument(parsedArgs, null, "-j", "--json-filename"); if( string.IsNullOrEmpty(policyName) || (string.IsNullOrEmpty(policyFilename) || !policyFilename.EndsWith(".json"))) CommandLine.ErrorExit( "\nOne or more of the required arguments is missing or incorrect." + "\nRun the command with no arguments to see help."); // Create an IAM service client var iamClient = new AmazonIdentityManagementServiceClient(); // Create the new policy var response = await CreateManagedPolicy(iamClient, policyName, policyFilename); Console.WriteLine($"\nPolicy {response.Policy.PolicyName} has been created."); Console.WriteLine($" Arn: {response.Policy.Arn}"); } // // Method to create an IAM policy from a JSON file private static async Task<CreatePolicyResponse> CreateManagedPolicy( IAmazonIdentityManagementService iamClient, string policyName, string jsonFilename) { return await iamClient.CreatePolicyAsync(new CreatePolicyRequest{ PolicyName = policyName, PolicyDocument = File.ReadAllText(jsonFilename)}); } // // Command-line help private static void PrintHelp() { Console.WriteLine( "\nUsage: IamCreatePolicyFromJson -p <policy-name> -j <json-filename>" + "\n -p, --policy-name: The name you want the new policy to have." + "\n -j, --json-filename: The name of the JSON file with the policy document."); } } // = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = // Class that represents a command line on the console or terminal. // (This is the same for all examples. When you have seen it once, you can ignore it.) static class CommandLine { // // Method to parse a command line of the form: "--key value" or "-k value". // // Parameters: // - args: The command-line arguments passed into the application by the system. // // Returns: // A Dictionary with string Keys and Values. // // If a key is found without a matching value, Dictionary.Value is set to the key // (including the dashes). // If a value is found without a matching key, Dictionary.Key is set to "--NoKeyN", // where "N" represents sequential numbers. public static Dictionary<string,string> Parse(string[] args) { var parsedArgs = new Dictionary<string,string>(); int i = 0, n = 0; while(i < args.Length) { // If the first argument in this iteration starts with a dash it's an option. if(args[i].StartsWith("-")) { var key = args[i++]; var value = key; // Check to see if there's a value that goes with this option? if((i < args.Length) && (!args[i].StartsWith("-"))) value = args[i++]; parsedArgs.Add(key, value); } // If the first argument in this iteration doesn't start with a dash, it's a value else { parsedArgs.Add("--NoKey" + n.ToString(), args[i++]); n++; } } return parsedArgs; } // // Method to get an argument from the parsed command-line arguments // // Parameters: // - parsedArgs: The Dictionary object returned from the Parse() method (shown above). // - defaultValue: The default string to return if the specified key isn't in parsedArgs. // - keys: An array of keys to look for in parsedArgs. public static string GetArgument( Dictionary<string,string> parsedArgs, string defaultReturn, params string[] keys) { string retval = null; foreach(var key in keys) if(parsedArgs.TryGetValue(key, out retval)) break; return retval ?? defaultReturn; } // // Method to exit the application with an error. public static void ErrorExit(string msg, int code=1) { Console.WriteLine("\nError"); Console.WriteLine(msg); Environment.Exit(code); } } }

其它注意事项

  • 以下是一个示例策略文档,您可以将其复制到 JSON 文件中并用作此应用程序的输入:

    { "Version" : "2012-10-17", "Id" : "DotnetTutorialPolicy", "Statement" : [ { "Sid" : "DotnetTutorialPolicyS3", "Effect" : "Allow", "Action" : [ "s3:Get*", "s3:List*" ], "Resource" : "*" }, { "Sid" : "DotnetTutorialPolicyPolly", "Effect": "Allow", "Action": [ "polly:DescribeVoices", "polly:SynthesizeSpeech" ], "Resource": "*" } ] }
  • 您可以通过查看IAM 控制台. 在筛选策略下拉列表中,选择客户托管. 当您不再需要策略时删除该策略。