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Dynamics 365 Community / Forums / Finance | Project Operations, Human Resources, ... / How to set content typ...
Finance | Project Operations, Human Resources, ...
Answered

How to set content type of file uploaded to Azure blob container

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Posted on by CU03040925-0 18

Hi

with inspiration from this: http://axtechnicalblogger.blogspot.com/2019/11/upload-files-to-azure-blob-from-d365-fo.html 

I can upload a stream to a azure blob container, but the 'file' in the container is of type 'application/octet-stream' when in fact it is a 'application/pdf'

Here is some more information:

I'm reading emails from a Office 365 mailbox, and if there is any attachments and the attachment is of type PDF ('application/pdf') I store the file in a Azure blob container for futher processing.

Storing is working, but the type is not correct

I have tries omething like this: https://stackoverflow.com/questions/10040403/set-content-type-of-media-files-stored-on-blob

But I am not 'allowed' to set the content type

Any hint on how to do this is D365/x++ is highly appreciated

Thanks

I have the same question (0)
  • Martin Dráb Profile Picture
    Martin Dráb 237,801 Most Valuable Professional on at

    Can you please elaborate why you can't set the content type?

  • Verified answer
    CU03040925-0 Profile Picture
    CU03040925-0 18 on at

    Here is the code:

    using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Blob;

class SavefileToAzureBlobStorage
{
    public static str saveFile(System.IO.Stream  _streamToSave, str _saveName, str _azureStorageAccountName, str _azureStorageAccountKey, str _azureBlobContainerName)
    {
        str ret;
        Microsoft.WindowsAzure.Storage.Auth.StorageCredentials storageCredentials;
        CloudStorageAccount storageAccount;
        
        try
        {
            storageCredentials = new Microsoft.WindowsAzure.Storage.Auth.StorageCredentials(_azureStorageAccountName, _azureStorageAccountKey);
            if(storageCredentials)
            {
                storageAccount = new Microsoft.WindowsAzure.Storage.CloudStorageAccount(storageCredentials, true);
                if(storageAccount)
                {
                    CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
                    CloudBlobContainer blobContainer = blobClient.GetContainerReference(_azureBlobContainerName);
                    blobContainer.CreateIfNotExistsAsync();

                    CloudBlockBlob blockblob =    blobContainer.GetBlockBlobReference(_savename);
                    if(blockblob && !blockblob.Exists(null, null))
                    {
                        blockblob.UploadFromStreamAsync(_streamToSave).Wait();
                        blockblob.FetchAttributes(null,null,null);
                        //blockblob.Properties.ContentType = "application/pdf";
                        BlobProperties BlobProperties = blockblob.Properties;
                        if(BlobProperties.Length == _streamToSave.Length)
                        {
                            ret = blockblob.Uri.AbsoluteUri;
                        }
                        
                    }
                    else
                    {
                        throw error(strFmt("File with name %1 already exists", _saveName));
                    }
                }
                else
                {
                    throw error("Failed to get storeage account");
                }
            }
            else
            {
                throw errorr("Faild to create storage credentials");
            }
        }
        catch(Exception::Error)
        {
            throw Error(AifUtil::getClrErrorMessage());
        }

        return ret;
    }

}

    If I uncomment the line where I set the content type I get a compilation error: Invalid token '=' 

  • Suggested answer
    Martin Dráb Profile Picture
    Martin Dráb 237,801 Most Valuable Professional on at

    Split it to two steps:

    BlobProperties blobProperties = blockblob.Properties;
blobProperties.ContentType = "application/pdf";

    It seems that the compiler gets confused if you do it at once.

  • CU03040925-0 Profile Picture
    CU03040925-0 18 on at

    yes... But the property is not set :)

    I must be missing something else

  • Martin Dráb Profile Picture
    Martin Dráb 237,801 Most Valuable Professional on at

    I think it is set, but it's not used for anything. You should set it before uploading the data, shouldn't you?

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