PROSAGA码农传奇-云存储-Openstackdotnet SDK对象存储对象版本控制

<div class =“post-text”itemprop =“text”>
  <P>
    根据该错误，您是否可能在创建对象时发送“if-none-match”标头？设置该标头后，如果您尝试上载容器中已存在的文件，则会引发该错误。我不相信您可以将该标头用于版本控制，因为检查基于名称，而不是正在上载的文件哈希值。只是一个猜测。 :-)
  </p>
  <P>
    下面是一个控制台应用程序，它在上传新版本之前上传文件两次，以证明这应该有效。
  </p>
   <pre>
    <code>
      using System;
using System.Collections.Generic;
using net.openstack.Core.Domain;
using net.openstack.Core.Providers;
using net.openstack.Providers.Rackspace;

namespace CloudFilesVersioning
{
    class Program
    {
        static void Main(string[] args)
        {
            var identityUrl = new Uri("{identity-url}");
            var identity = new CloudIdentityWithProject
            {
                Username = "{user}",
                ProjectName = "{project-name}",
                Password = "{password}"
            };
            const string region = "RegionOne";

var identityProvider = new OpenStackIdentityProvider(identityUrl, identity);
            var filesProvider = new CloudFilesProvider(null, identityProvider);

// Create versions container
            const string versionContainerName = "mycontainer-versions";
            filesProvider.CreateContainer(versionContainerName, region: region);

// Create main container
            const string containerName = "mycontainer";
            var headers = new Dictionary<string, string>
            {
                {"X-Versions-Location", versionContainerName}
            };
            filesProvider.CreateContainer(containerName, headers, region);

// Upload the initial file
            filesProvider.CreateObjectFromFile(containerName, @"C:\thing-v1.txt", "thing.txt", region: region);

// Upload the same file again, this should not create a new version
            filesProvider.CreateObjectFromFile(containerName, @"C:\thing-v1.txt", "thing.txt", region: region);

// Upload a new version of the file
            filesProvider.CreateObjectFromFile(containerName, @"C:\thing-v2.txt", "thing.txt", region: region);
        }
    }
}

</code>
  </pre>
</DIV>