任何人都可以在.net(c#或vb.net)中为rackspace云文件tempurl函数提供示例吗?
RackSpace网站上有文档: http://docs.rackspacecloud.com/files/api/v1/cf-devguide/cf-devguide-20121130.pdf 从第52页开始。
Ruby和Python中有一些例子,但我在移植它们时遇到了麻烦。我需要:
答案 0 :(得分:2)
以下内容将使用C#生成临时URL:
var account = new CF_Account(conn, client);
string tempUrlKey = account.Metadata["temp-url-key"];
//Set the link to expire after 60 seconds (in epoch time)
int epochExpire = ((int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds) + 60;
//The path to the cloud file
string path = string.Format("{0}/{1}/{2}", account.StorageUrl.AbsolutePath, containerName, fileName);
string hmacBody = string.Format("GET\n{0}\n{1}", epochExpire.ToString(), path);
byte[] hashSaltBytes = Encoding.ASCII.GetBytes(tempUrlKey);
string sig = null;
using (HMACSHA1 myhmacMd5 = new HMACSHA1(hashSaltBytes))
{
byte[] ticketBytes = Encoding.ASCII.GetBytes(hmacBody);
byte[] checksum = myhmacMd5.ComputeHash(ticketBytes);
StringBuilder hexaHash = new StringBuilder();
foreach (byte b in checksum)
{
hexaHash.Append(String.Format("{0:x2}", b));
}
sig = hexaHash.ToString();
}
string cloudFileUrl = string.Format("https://{0}{1}", account.StorageUrl.Host, path);
//Compile the temporary URL
string tempUrl = string.Format("{0}?temp_url_sig={1}&temp_url_expires={2}", cloudFileUrl, sig, epochExpire);
答案 1 :(得分:2)
知识分子的答复似乎不适用于当前的openstack.net NuGet软件包,但我已经设法通过反复试验使用最新版本(1.1.2.1)。希望这会有助于其他人
在我的情况下,似乎我没有设置临时URL元数据密钥,因为已经设置了一个,必须在创建帐户时随机生成。因此,获取有效的临时URL的代码如下所示。
N.b。我使用了Username和APIKey进行身份验证。我猜你可以用密码代替。可以在Rackspace云控制面板网站的帐户详细信息下找到APIKey。
private static string GetCloudFilesTempUrl(Uri storageUrl, string username, string apiKey, string containerName, string filename)
{
var cloudIdentity = new CloudIdentity()
{
Username = username,
APIKey = apiKey
};
var provider = new CloudFilesProvider(cloudIdentity);
var accountMetaData = provider.GetAccountMetaData();
var tempUrlKey = accountMetaData["Temp-Url-Key"];
//Set the link to expire after 60 seconds (in epoch time)
var epochExpire = ((int) (DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds) + 60;
//The path to the cloud file
var path = string.Format("{0}/{1}/{2}", storageUrl.AbsolutePath, containerName, filename);
var hmacBody = string.Format("GET\n{0}\n{1}", epochExpire, path);
var hashSaltBytes = Encoding.ASCII.GetBytes(tempUrlKey);
string sig;
using (var myhmacMd5 = new HMACSHA1(hashSaltBytes))
{
var ticketBytes = Encoding.ASCII.GetBytes(hmacBody);
var checksum = myhmacMd5.ComputeHash(ticketBytes);
var hexaHash = new StringBuilder();
foreach (var b in checksum)
{
hexaHash.Append(String.Format("{0:x2}", b));
}
sig = hexaHash.ToString();
}
var cloudFileUrl = string.Format("https://{0}{1}", storageUrl.Host, path);
//Compile the temporary URL
return string.Format("{0}?temp_url_sig={1}&temp_url_expires={2}", cloudFileUrl, sig, epochExpire);
}
我不确定你是如何获取存储网址的,但是通过更多的试验和错误我设法了:
private static string GetCloudFilesStorageUrl(string username, string apiKey)
{
var cloudIdentity = new CloudIdentity()
{
Username = username,
APIKey = apiKey
};
var identityProvider = new CloudIdentityProvider(cloudIdentity);
return identityProvider.GetUserAccess(cloudIdentity)
.ServiceCatalog
.Single(x => x.Name == "cloudFiles")
.Endpoints[0].PublicURL;
}
如上所述,我没有设置临时URL密钥,我可能不会尝试以防万一我打破了正常工作的东西!如果你需要,我猜这应该做的诀窍:
private static void SetCloudFilesTempUrlKey(string username, string apiKey, string tempUrlKey)
{
var cloudIdentity = new CloudIdentity()
{
Username = username,
APIKey = apiKey
};
var provider = new CloudFilesProvider(cloudIdentity);
provider.UpdateAccountMetadata(new Metadata
{
{ "Temp-Url-Key", tempUrlKey }
});
}