/// <summary>
/// Attempts to grab the requested FileMetadataEntity using the input ID as the row key.
/// If successful, grabs the object and references the ID to get the blob.
/// Assigns the blob to a stream object.
/// </summary>
/// <param name="id">The RowKey of the given blob</param>
/// <returns>Stream containing blob data</returns>
public Stream GetPDF(string id)
{
try
{
TableOperation getOperation = TableOperation.Retrieve <FileMetadataEntity>(partitionName, id);
TableResult getOperationResult = table.Execute(getOperation);
//Create a retrieve operation that takes a FileMetadataEntity object
var file = (FileMetadataEntity)getOperationResult.Result; //Cast the table result as a FileMetadataEntity object
string blobName = file.Title + ".txt.pdf"; //Assign the extension in order to get the correct reference
WebjobHandler _azureHandler = new WebjobHandler();
var blob = _azureHandler.GetCloudBlobContainer().GetDirectoryReference("pdfdocs").GetBlockBlobReference(blobName);
blob.FetchAttributes();
//Grab the relevant blob using the blob container and given ID
Stream blobStream = blob.OpenRead(); //Read the blob into a Stream object
return(blobStream); //Return stream data gathered from blob
}
catch
{
return(null); //Return null if no blob is found
}
}
/// <summary>
/// Attempts to grab the requested FileMetadataEntity using the input ID as the row key.
/// If successful, grabs the blob and opens a HttpResponseMessage which reads the blob content and sets
/// the values 'MediaType' and 'ContentDispositionHeader' to allow for downloading of the PDF file
/// If the table operation or grabbing the blob fails, automatically return a not found exception regardless
/// </summary>
/// <param name="id">The ID being inserted into the API</param>
/// <returns>A HttpResponseMessage with the given blob & related PDF file</returns>
public HttpResponseMessage GetRequestedPDF(string id)
{
try
{
TableOperation getOperation = TableOperation.Retrieve <FileMetadataEntity>(partitionName, id);
TableResult getOperationResult = table.Execute(getOperation);
//Create a retrieve operation that takes a FileMetadataEntity object
var file = (FileMetadataEntity)getOperationResult.Result; //Cast the table result as a FileMetadataEntity object
string blobName = file.Title + ".txt.pdf"; //Assign the extension in order to get the correct reference
WebjobHandler _azureHandler = new WebjobHandler();
var blob = _azureHandler.GetCloudBlobContainer().GetDirectoryReference("pdfdocs").GetBlockBlobReference(blobName);
blob.FetchAttributes();
//Grab the relevant blob using the blob container and given ID
Stream blobStream = blob.OpenRead();
var blobUrl = blob.Uri.ToString();
var message = new HttpResponseMessage(HttpStatusCode.OK);
message.Content = new StreamContent(blobStream); //Set stream content to blob stream data
message.Content.Headers.ContentLength = blob.Properties.Length;
message.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/pdf");
message.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment")
{
FileName = blob.Name,
Size = blob.Properties.Length
};
return(message); //Return the HttpResponseMessage as a PDF for the given
}
catch
{
var message = new HttpResponseMessage(HttpStatusCode.NotFound);
return(message);
}
}
