Give the following code and output, i get the same exception for this file each time i try to download it.
If I download it without md5 validation and check the content, there is nothing wrong with the file so I am suspecting that the md5 property value is incorrect on the blobs metadata.
I am trying to figure out how it could become invalid in the first place. Is it not azure blob storage internal that sets this property when files are uploaded?
I dont want to DisableContentMD5Validation as a solution.
(ps. i used Couldberry Explorer to upload the file in the first place)
static void Main(string[] args)
{
{
try
{
var client = account.CreateCloudBlobClient();
var container = client.GetContainerReference("algorithms");
var blob = container.GetBlockBlobReference("SInnovations.Algorithms/SInnovations.Algorithms.FootprintFinder.1.0.0-pre-20140430.zip");
blob.FetchAttributes();
Console.WriteLine(blob.Properties.ContentMD5);
blob.DownloadToFile("c:\\dev\\test.zip", System.IO.FileMode.Create);
}
catch (StorageException ex)
{
if (ex.Message == "Calculated MD5 does not match existing property")
{
Console.WriteLine("Calculated MD5 does not match existing property");
}
}
}
{
var client = account.CreateCloudBlobClient();
var container = client.GetContainerReference("algorithms");
var blob = container.GetBlockBlobReference("SInnovations.Algorithms/SInnovations.Algorithms.FootprintFinder.1.0.0-pre-20140430.zip");
blob.FetchAttributes();
Console.WriteLine(blob.Properties.ContentMD5);
blob.DownloadToFile("c:\\dev\\test.zip", System.IO.FileMode.Create,null,new BlobRequestOptions()
{
DisableContentMD5Validation = true,
});
using (var md5 = MD5.Create())
{
using (var stream = File.OpenRead("c:\\dev\\test.zip"))
{
Console.WriteLine(md5.ComputeHash(stream));
}
}
}
}
}
gives this output
RH4EqqbthSm24KPgZ2VSGQ==
Calculated MD5 does not match existing property
RH4EqqbthSm24KPgZ2VSGQ==
System.Byte[]
Press any key to continue . . .
Bad example, the local files md5 is infact, Hv+nQRNCPQnvy4WU9+qaQA==.
Conclussion the property must be set wrong at some point.
Solution. Download and calculate md5 and update property value of the blob.
