当文件名包含特殊字符时，shareSasBuilder不起作用
当文件名包含特殊字符时，shareSasBuilder不起作用
提问于 2020-09-23 01:32:05
我需要允许用户下载存储在Azure文件共享上的特定文件。只要文件名不包含特殊字符，它就能正常工作，但如果文件名包含任何特殊字符(如空格)，它就会失败，并出现AuthenticationFailed错误。
<Error>
<Code>AuthenticationFailed</Code>
<Message>
Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. RequestId:19654741-801a-0014-1b04-9197c9000000 Time:2020-09-22T17:20:44.1980779Z
</Message>
<AuthenticationErrorDetail>
Signature did not match. String to sign used was r 2020-09-22T19:20:42Z /file/depotsracq/cegep/BA/ZOOM 2.pdf 2019-07-07
</AuthenticationErrorDetail>
</Error>下面是返回Uri的方法。我很确定这与特殊字符的编码有关。在ShareSasBuilder中，我传递没有编码的文件名(file.Path)，但是URL需要对特殊字符进行编码。我猜Azure希望特殊字符以不同的方式编码。
public Uri getFileUri(string filePath)
{
ShareDirectoryClient directory = shareClient.GetDirectoryClient(Path.GetDirectoryName(filePath));
ShareFileClient file = directory.GetFileClient(Path.GetFileName(filePath));
if (file.Exists())
{
var shareSasBuilder = new ShareSasBuilder
{
ShareName = directory.ShareName,
FilePath = file.Path,
ExpiresOn = DateTime.UtcNow.AddHours(+2)
};
shareSasBuilder.SetPermissions(ShareFileSasPermissions.Read);
SasQueryParameters sasQueryParameters = shareSasBuilder.ToSasQueryParameters(sharedKeyCredential);
UriBuilder fullUri = new UriBuilder(file.Uri)
{
Query = sasQueryParameters.ToString()
};
return fullUri.Uri;
}
else
{
return null;
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2020-09-23 10:52:01
请确保您使用的是最新版本的azure文件共享包：Azure.Storage.Files.Shares, version 12.4.0。
我测试了它在我身边的文件名包含特殊字符，如white-space或@等。它返回一个有效的网址与sastoken，它可以用来成功地访问文件。示例代码如下：
string conn_str = "DefaultEndpointsProtocol=https;AccountName=xxx;AccountKey=xx;EndpointSuffix=core.windows.net";
var sharedKeyCredential = new StorageSharedKeyCredential("xxx", "xxx");
ShareServiceClient client = new ShareServiceClient(conn_str);
var shareClient = client.GetShareClient("aaa");
ShareDirectoryClient directory = shareClient.GetDirectoryClient("bbb");
//use file name contains special chars like @
ShareFileClient file = directory.GetFileClient("foo@@.txt");
//or use the file name contains white-space
//ShareFileClient file = directory.GetFileClient("foo test.txt");
if (file.Exists())
{
var shareSasBuilder = new ShareSasBuilder
{
ShareName = directory.ShareName,
FilePath = file.Path,
ExpiresOn = DateTime.UtcNow.AddHours(+2)
};
shareSasBuilder.SetPermissions(ShareFileSasPermissions.Read);
SasQueryParameters sasQueryParameters = shareSasBuilder.ToSasQueryParameters(sharedKeyCredential);
UriBuilder fullUri = new UriBuilder(file.Uri)
{
Query = sasQueryParameters.ToString()
};
return fullUri.Uri;
}如果你还有什么问题，请告诉我。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/64014895
复制相关文章
相似问题
腾讯云开发者
