Amazon Simple Storage Service
开发人员指南 (API 版本 2006-03-01)
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使用适用于 .NET 的 AWS 开发工具包实现跨源资源共享 (CORS)

要管理存储桶的跨源资源共享 (CORS),您可以使用适用于 .NET 的 AWS 开发工具包。有关 CORS 的更多信息,请参阅 跨源资源共享 (CORS)

以下 C# 代码:

  • 创建 CORS 配置并对存储桶设置该配置

  • 通过添加规则来检索并修改配置

  • 向存储桶添加修改过的配置

  • 删除配置

有关创建和测试有效示例的信息,请参阅 运行 Amazon S3 .NET 代码示例

// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved. // SPDX-License-Identifier: MIT-0 (For details, see https://github.com/awsdocs/amazon-s3-developer-guide/blob/master/LICENSE-SAMPLECODE.) using Amazon.S3; using Amazon.S3.Model; using System; using System.Collections.Generic; using System.Threading.Tasks; namespace Amazon.DocSamples.S3 { class CORSTest { private const string bucketName = "*** bucket name ***"; // Specify your bucket region (an example region is shown). private static readonly RegionEndpoint bucketRegion = RegionEndpoint.USWest2; private static IAmazonS3 s3Client; public static void Main() { s3Client = new AmazonS3Client(bucketRegion); CORSConfigTestAsync().Wait(); } private static async Task CORSConfigTestAsync() { try { // Create a new configuration request and add two rules CORSConfiguration configuration = new CORSConfiguration { Rules = new System.Collections.Generic.List<CORSRule> { new CORSRule { Id = "CORSRule1", AllowedMethods = new List<string> {"PUT", "POST", "DELETE"}, AllowedOrigins = new List<string> {"http://*.example.com"} }, new CORSRule { Id = "CORSRule2", AllowedMethods = new List<string> {"GET"}, AllowedOrigins = new List<string> {"*"}, MaxAgeSeconds = 3000, ExposeHeaders = new List<string> {"x-amz-server-side-encryption"} } } }; // Add the configuration to the bucket. await PutCORSConfigurationAsync(configuration); // Retrieve an existing configuration. configuration = await RetrieveCORSConfigurationAsync(); // Add a new rule. configuration.Rules.Add(new CORSRule { Id = "CORSRule3", AllowedMethods = new List<string> { "HEAD" }, AllowedOrigins = new List<string> { "http://www.example.com" } }); // Add the configuration to the bucket. await PutCORSConfigurationAsync(configuration); // Verify that there are now three rules. configuration = await RetrieveCORSConfigurationAsync(); Console.WriteLine(); Console.WriteLine("Expected # of rulest=3; found:{0}", configuration.Rules.Count); Console.WriteLine(); Console.WriteLine("Pause before configuration delete. To continue, click Enter..."); Console.ReadKey(); // Delete the configuration. await DeleteCORSConfigurationAsync(); // Retrieve a nonexistent configuration. configuration = await RetrieveCORSConfigurationAsync(); } catch (AmazonS3Exception e) { Console.WriteLine("Error encountered on server. Message:'{0}' when writing an object", e.Message); } catch (Exception e) { Console.WriteLine("Unknown encountered on server. Message:'{0}' when writing an object", e.Message); } } static async Task PutCORSConfigurationAsync(CORSConfiguration configuration) { PutCORSConfigurationRequest request = new PutCORSConfigurationRequest { BucketName = bucketName, Configuration = configuration }; var response = await s3Client.PutCORSConfigurationAsync(request); } static async Task<CORSConfiguration> RetrieveCORSConfigurationAsync() { GetCORSConfigurationRequest request = new GetCORSConfigurationRequest { BucketName = bucketName }; var response = await s3Client.GetCORSConfigurationAsync(request); var configuration = response.Configuration; PrintCORSRules(configuration); return configuration; } static async Task DeleteCORSConfigurationAsync() { DeleteCORSConfigurationRequest request = new DeleteCORSConfigurationRequest { BucketName = bucketName }; await s3Client.DeleteCORSConfigurationAsync(request); } static void PrintCORSRules(CORSConfiguration configuration) { Console.WriteLine(); if (configuration == null) { Console.WriteLine("\nConfiguration is null"); return; } Console.WriteLine("Configuration has {0} rules:", configuration.Rules.Count); foreach (CORSRule rule in configuration.Rules) { Console.WriteLine("Rule ID: {0}", rule.Id); Console.WriteLine("MaxAgeSeconds: {0}", rule.MaxAgeSeconds); Console.WriteLine("AllowedMethod: {0}", string.Join(", ", rule.AllowedMethods.ToArray())); Console.WriteLine("AllowedOrigins: {0}", string.Join(", ", rule.AllowedOrigins.ToArray())); Console.WriteLine("AllowedHeaders: {0}", string.Join(", ", rule.AllowedHeaders.ToArray())); Console.WriteLine("ExposeHeader: {0}", string.Join(", ", rule.ExposeHeaders.ToArray())); } } } }