Question

我正在Azure托管的网站上工作，该网站具有下载功能。为减少我们服务器的负载，使用共享访问签名完成下载。但是，在Safari下载文件时，文件名用单引号括起来，如myFile.txt下载为“myFile.txt＆＃39;”。这使得下载的拉链必须由客户端重命名，以便可以提取内容。

生成共享访问签名的代码如下：

        CloudBlockBlob blob = container.GetBlockBlobReference(Helpers.StringHelper.TrimIfNotNull(blobName));
        if (!blob.Exists())
        {
            return string.Empty;
        }

        var sasConstraints = new SharedAccessBlobPolicy();
        sasConstraints.SharedAccessStartTime = DateTime.UtcNow.AddSeconds(-5);
        sasConstraints.SharedAccessExpiryTime = DateTime.UtcNow.Add(duration);
        sasConstraints.Permissions = SharedAccessBlobPermissions.Read | SharedAccessBlobPermissions.Write;

        var headers = new SharedAccessBlobHeaders();
        string filename = blobName;
        if (filename.Contains("/"))
        {
            filename = blobName.Substring(blobName.LastIndexOf("/") + 1, blobName.Length - blobName.LastIndexOf("/") - 1);
        }
        headers.ContentDisposition = "attachment; filename='" + filename + "'";

        //Generate the shared access signature on the blob, setting the constraints directly on the signature.
        string sasBlobToken = blob.GetSharedAccessSignature(sasConstraints, headers);

        //Return the URI string for the container, including the SAS token.
        return blob.Uri + sasBlobToken;

此代码在Chrome，Firefox和IE中运行良好。标题中是否有我遗漏的东西？我唯一要修改的是内容处理。

Answer 1

您应该在HTTP标头中对引用的字符串使用双引号，如RFC2616中所述。

所以替换

headers.ContentDisposition = "attachment; filename='" + filename + "'";

带

headers.ContentDisposition = "attachment; filename=\"" + filename + "\"";

从Azure存储下载，在文件名周围添加单引号

1 个答案: