public async Task OnBeforeCreateAsync(BeforeCreateContext context)
{
if (!context.Metadata.ContainsKey("filename"))
{
context.FailRequest("filename metadata must be specified. ");
_logger.LogInformation($"Fileupload failed: filename metadata must be specified");
}
if (!context.Metadata.ContainsKey("filetype"))
{
context.FailRequest("filetype metadata must be specified. ");
_logger.LogInformation($"Fileupload failed: filetype metadata must be specified");
}
var metadataInString = "";
foreach (var item in context.Metadata)
{
if (metadataInString.Length != 0)
{
metadataInString += ", ";
}
metadataInString += $"\"{item.Key}:{item.Value.GetString(Encoding.UTF8)}\"";
}
_logger.LogInformation($"Fileupload started: {metadataInString}");
await Task.CompletedTask;
}
private static Task <bool> HandleOnBeforeCreateAsync(ContextAdapter context, bool supportsUploadConcat,
UploadConcat uploadConcat, string metadata, long uploadLength)
{
if (context.Configuration.Events?.OnBeforeCreateAsync == null)
{
return(Task.FromResult(false));
}
return(HandleOnBeforeCreateAsyncLocal());
async Task <bool> HandleOnBeforeCreateAsyncLocal()
{
var beforeCreateContext = BeforeCreateContext.Create(context, ctx =>
{
ctx.FileConcatenation = supportsUploadConcat ? uploadConcat.Type : null;
ctx.Metadata = Metadata.Parse(metadata);
ctx.UploadLength = uploadLength;
});
await context.Configuration.Events.OnBeforeCreateAsync(beforeCreateContext);
if (beforeCreateContext.HasFailed)
{
return(await context.Response.Error(HttpStatusCode.BadRequest, beforeCreateContext.ErrorMessage));
}
return(false);
}
}
/// <summary>
/// Handle the pre upload required metadata
/// </summary>
private Task OnBeforeCreate(BeforeCreateContext ctx)
{
// Partial files are not complete so we do not need to validate the metadata in our example.
if (ctx.FileConcatenation is FileConcatPartial)
{
return(Task.CompletedTask);
}
if (!ctx.Metadata.ContainsKey("name"))
{
ctx.FailRequest("name metadata must be specified.");
}
if (!ctx.Metadata.ContainsKey("contentType"))
{
ctx.FailRequest("contentType metadata must be specified.");
}
return(Task.CompletedTask);
}
public Task HandleBeforeCreate(BeforeCreateContext context)
{
return(Task.CompletedTask);
}