Exemplo n.º 1
0
        protected IEnumerable <UploadModel> Upload()
        {
            var formAccumulator = new KeyValueAccumulator();
            var boundary        = MultipartRequestHelper.GetBoundary(MediaTypeHeaderValue.Parse(Request.ContentType), formOptions.MultipartBoundaryLengthLimit);
            var reader          = new MultipartReader(boundary, HttpContext.Request.Body);

            var section = reader.ReadNextSectionAsync().GetAwaiter().GetResult();

            while (section != null)
            {
                if (ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
                {
                    if (MultipartRequestHelper.HasFileContentDisposition(contentDisposition))
                    {
                        var result = new UploadModel
                        {
                            FileName = contentDisposition.FileName.ToString(),
                            Stream   = section.Body
                        };
                        yield return(result);
                    }
                    else if (MultipartRequestHelper.HasFormDataContentDisposition(contentDisposition))
                    {
                        // Content-Disposition: form-data; name="key"
                        // Do not limit the key name length here because the
                        // multipart headers length limit is already in effect.
                        var key      = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
                        var encoding = GetEncoding(section);
                        using (var streamReader = new StreamReader(
                                   section.Body,
                                   encoding,
                                   detectEncodingFromByteOrderMarks: true,
                                   bufferSize: 2048,
                                   leaveOpen: true))
                        {
                            // The value length limit is enforced by MultipartBodyLengthLimit
                            var value = streamReader.ReadToEnd();
                            if (String.Equals(value, "undefined", StringComparison.OrdinalIgnoreCase))
                            {
                                value = String.Empty;
                            }
                            formAccumulator.Append(key.ToString(), value);

                            if (formAccumulator.ValueCount > formOptions.ValueCountLimit)
                            {
                                throw new InvalidDataException($"Form key count limit {formOptions.ValueCountLimit} exceeded.");
                            }
                        }
                    }
                }
                section = reader.ReadNextSectionAsync().GetAwaiter().GetResult();
            }
        }
Exemplo n.º 2
0
        public async Task <ActionResult> UploadFile([FromRoute] K id, [FromRoute] string fileName)
        {
            if (table.FileNameKey == null)
            {
                return(BadRequest("No file columns presented!"));
            }
            if (!MultipartRequestHelper.IsMultipartContentType(Request.ContentType))
            {
                return(BadRequest($"Expected a multipart request, but got {Request.ContentType}"));
            }
            using (var transaction = new DBTransaction(table.Connection, CurrentUser))
            {
                try
                {
                    var item = table.LoadById(id, DBLoadParam.Load | DBLoadParam.Referencing, null, transaction);
                    if (item == null)
                    {
                        return(NotFound());
                    }
                    if (!(item.Access?.GetFlag(AccessType.Update, transaction.Caller) ?? true) &&
                        !(item.Access?.GetFlag(AccessType.Create, transaction.Caller) ?? true))
                    {
                        return(Forbid());
                    }

                    foreach (var upload in Upload())
                    {
                        if (string.IsNullOrEmpty(fileName) && !string.IsNullOrEmpty(upload.FileName))
                        {
                            fileName = upload.FileName;
                        }
                        item.SetValue(fileName, table.FileNameKey);
                        if (table.FileLOBKey != null)
                        {
                            await item.SetLOB(upload.Stream, table.FileLOBKey, transaction);
                        }
                        else if (table.FileKey != null)
                        {
                            await item.SetStream(upload.Stream, table.FileKey, transaction);
                        }
                        transaction.Commit();
                    }
                    return(Ok());
                }
                catch (Exception ex)
                {
                    transaction.Rollback();
                    return(BadRequest(ex));
                }
            }
        }
Exemplo n.º 3
0
        protected async Task <UploadModel> Upload(bool inMemory)
        {
            var formAccumulator = new KeyValueAccumulator();
            var result          = new UploadModel();

            var boundary = MultipartRequestHelper.GetBoundary(MediaTypeHeaderValue.Parse(Request.ContentType), formOptions.MultipartBoundaryLengthLimit);
            var reader   = new MultipartReader(boundary, HttpContext.Request.Body);

            var section = (MultipartSection)null;

            while ((section = await reader.ReadNextSectionAsync()) != null)
            {
                if (ContentDispositionHeaderValue.TryParse(section.ContentDisposition, out var contentDisposition))
                {
                    if (MultipartRequestHelper.HasFileContentDisposition(contentDisposition))
                    {
                        result.FileName = contentDisposition.FileName.ToString();
                        if (inMemory)
                        {
                            result.Stream = new MemoryStream();
                        }
                        else
                        {
                            result.FilePath = Path.GetTempFileName();
                            result.Stream   = System.IO.File.Create(result.FilePath);
                        }
                        await section.Body.CopyToAsync(result.Stream);

                        await result.Stream.FlushAsync();
                    }
                    else if (MultipartRequestHelper.HasFormDataContentDisposition(contentDisposition))
                    {
                        // Content-Disposition: form-data; name="key"
                        //
                        // value

                        // Do not limit the key name length here because the
                        // multipart headers length limit is already in effect.
                        var key      = HeaderUtilities.RemoveQuotes(contentDisposition.Name);
                        var encoding = GetEncoding(section);
                        using (var streamReader = new StreamReader(
                                   section.Body,
                                   encoding,
                                   detectEncodingFromByteOrderMarks: true,
                                   bufferSize: 2048,
                                   leaveOpen: true))
                        {
                            // The value length limit is enforced by MultipartBodyLengthLimit
                            var value = await streamReader.ReadToEndAsync();

                            if (String.Equals(value, "undefined", StringComparison.OrdinalIgnoreCase))
                            {
                                value = String.Empty;
                            }
                            formAccumulator.Append(key.ToString(), value);

                            if (formAccumulator.ValueCount > formOptions.ValueCountLimit)
                            {
                                throw new InvalidDataException($"Form key count limit {formOptions.ValueCountLimit} exceeded.");
                            }
                        }
                    }
                }
            }
            return(result);
        }