How to unzip file in Azure File Share using Azure Function? - azure

Question

I have an Azure Storage Account with Azure File share. I want to extract zip archive file to another dir in file share using Azure functions. I wrote this code in C#:
CloudFileDirectory rootDirectory = cloudFileShare.GetRootDirectoryReference();
CloudFileDirectory output = rootDirectory.GetDirectoryReference("output");
CloudFile cloudFile = input.GetFileReference("archive1.zip");
using (var stream = await cloudFile.OpenReadAsync())
{
var file1 = new ZipArchive(stream);
foreach (var zipEntry in file1.Entries)
{
var file2 = output.GetFileReference(zipEntry.Name);
var fileStream = zipEntry.Open();
await file2.UploadFromStreamAsync(fileStream); //error is in this line
}
}
But I got the error:
System.Private.CoreLib: Exception while executing function: HttpTriggerExtract. Microsoft.WindowsAzure.Storage:
Operation is not valid due to the current state of the object.
How to fix this?
Edit: I fix the error using MemoryStream in addition, this code works:
foreach (var zipEntry in file1.Entries) {
var fsz = output.GetFileReference(zipEntry.Name);
using (var ms = new MemoryStream())
{
using (var fileStream = zipEntry.Open())
{
await fileStream.CopyToAsync(ms);
ms.Seek(0, SeekOrigin.Begin);
await fsz.UploadFromStreamAsync(ms);
}
}

Answer 1

Regarding the issue, please refer to the following code (I use package WindowsAzure.Storage 9.3.1 to do that)
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
CloudFileClient cloudFileClient = storageAccount.CreateCloudFileClient();
CloudFileShare cloudFileShare = cloudFileClient.GetShareReference("share2");
CloudFileDirectory rootDirectory = cloudFileShare.GetRootDirectoryReference();
CloudFileDirectory input = rootDirectory.GetDirectoryReference("input");
CloudFileDirectory output = rootDirectory.GetDirectoryReference("output");
CloudFile cloudFile = input.GetFileReference("sample.zip");
using (var stream = await cloudFile.OpenReadAsync())
using (var zipArchive = new ZipArchive(stream)) {
foreach (var entry in zipArchive.Entries)
{
if (entry.Length > 0) {
CloudFile extractedFile = output.GetFileReference(entry.Name);
using (var entryStream = entry.Open())
{
byte[] buffer = new byte[16 * 1024];
using (var ms = await extractedFile.OpenWriteAsync(entry.Length))
{
int read;
while ((read = await entryStream.ReadAsync(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, read);
}
}
}
}
}
}

Answer 2

The above answer helped me for my problem.
With the new Azure Library (12.7.0) you have to code this way:
string srcDir = #"sourcePath";
string destDir = #"sourcePath\testStorageUnzip";
string srcFileName = "AzureStorageZip.zip";
string azureConnectionString = ConfigurationManager.AppSettings["beecloudfileshare_AzureStorageConnectionString"];
StorageSharedKeyCredential credential = BeeFileManager.GetAzureStorageKeyCredential(azureConnectionString);
Uri srcUri = new Uri("https:" + Path.Combine(srcDir, srcFileName).Replace("\\", "/"), UriKind.Absolute);
Uri destDirUri = new Uri("https:" + Path.Combine(destDir).Replace("\\", "/"), UriKind.Absolute);
// Get a reference to the file we created previously
ShareFileClient sourceFile = new ShareFileClient(srcUri, credential);
ShareDirectoryClient shareDirectoryClient = new ShareDirectoryClient(destDirUri,credential);
shareDirectoryClient.CreateIfNotExistsAsync().GetAwaiter().GetResult();
using (var stream = sourceFile.OpenRead())
using (var zipArchive = new ZipArchive(stream))
{
foreach (var entry in zipArchive.Entries)
{
if (entry.Length > 0)
{
//CloudFile extractedFile = output.GetFileReference(entry.Name);
Uri destUri = new Uri("https:" + Path.Combine(destDir, entry.Name).Replace("\\", "/"), UriKind.Absolute);
ShareFileClient extractedFile = new ShareFileClient(destUri, credential);
using (var entryStream = entry.Open())
{
using (MemoryStream ms = new MemoryStream())
{
entryStream.CopyTo(ms);
//
//Sorry I have this part in another method
//
Uri fileUri = new Uri("https:" + Path.GetDirectoryName(filePath).Replace("\\", "/"), UriKind.Absolute);
// Get a reference to the file we created previously
ShareDirectoryClient directory = new ShareDirectoryClient(fileUri, credential);
ShareFileClient file = directory.GetFileClient(Path.GetFileName(filePath));
ms.Seek(0, SeekOrigin.Begin);
file.Create(ms.Length);
file.Upload(ms);
//
//
//
}
}
}
}
}
}