Access files in VM using Azure function app

Question

Hi In my organization they have a Azure disk and mounted to Azure VM and use as file share. File can be accessed as network file \trmfs1.termserv.xxxx.com\termserv_apps_cust\xxxx.pdf. My requirement is, I want to access same file using RESTAPI deployed on app service. (same azure env). Networking page of the both app service and VM given below Networking page of app service (where my REST API deployed)

Networking page of the Azure VM

Kindly share you opinion on this. Still I cannot figure out a way to access files in VM. .NET core I have used to access the file

  WebClient request = new WebClient();
  request.Credentials = new NetworkCredential(@"nuwanw", "password");

  FileInfo myFile = new FileInfo(@"\\trmfs1.termserv.xxxx.com\termserv_apps_cust\bol_6007112_7.pdf");
             bool exists = myFile.Exists;
            return Ok(exists);

Thanks Nuwan

Answer 1

Hello @Nuwan Wickramanayaka If you want to use REST API you should make a request directly to Azure File Share, as in your case file share is mounted via SMB protocol
Code example

string connectionString = "<connection_string>";

// Name of the share, directory, and file we'll download from
string shareName = "sample-share";
string dirName = "sample-dir";
string fileName = "sample-file";

// Path to the save the downloaded file
string localFilePath = @"<path_to_local_file>";

// Get a reference to the file
ShareClient share = new ShareClient(connectionString, shareName);
ShareDirectoryClient directory = share.GetDirectoryClient(dirName);
ShareFileClient file = directory.GetFileClient(fileName);

// Download the file
ShareFileDownloadInfo download = file.Download();
using (FileStream stream = File.OpenWrite(localFilePath))
{
    download.Content.CopyTo(stream);
}

https://learn.microsoft.com/en-us/dotnet/api/overview/azure/storage.files.shares-readme?view=azure-dotnet

If you want to access file share from Azure WebApp via SMB protocol, you will need to connect Azure Web App to same VNET with VM and use following code:

// SMBConfiguration.cs
using System;

namespace NetFrameworkApp.Controllers
{
    public class SMBConfiguration
    {
        public String GetSharePath()
        {
            return Environment.GetEnvironmentVariable("SMB_PATH");
        }

        public String GetUserName()
        {
            return Environment.GetEnvironmentVariable("SMB_USERNAME");
        }

        public String GetPassword()
        {
            return Environment.GetEnvironmentVariable("SMB_PASSWORD");
        }
    }
}

https://docs.pivotal.io/application-service-windows/2-8/smb-volumes-apps.html