Zip Email attachment - not working - no documentation #34
Description
Hello,
Description:
We are trying to attach a zip file to the attachment from MemoryStream but for some reason in the e-mail it shows no_file_name_provided.
Version: 2.1.3
Environment : Production
Reproducing : Attach an zip file via MemoryStream or with System.Net.Mail.Attachment class and it won't add the type and the name.
Good to know:
If I download the "no_file_name_provided" and add an extension .zip I can access the resource.
I'm guessing it might be because of the Stream which is to expect System.Io.Stream and maybe it should expect
Example of code
using var attachmentsStream = new MemoryStream(attachment);
System.Net.Mime.ContentType ct = new System.Net.Mime.ContentType(System.Net.Mime.MediaTypeNames.Application.Zip);
System.Net.Mail.Attachment attach = new System.Net.Mail.Attachment(attachmentsStream, ct);
attach.ContentDisposition!.FileName = "file.zip";
infoBipClient.SendMailAsync(
new MailPropertiesModel
{
Receiver = model.Receiver,
Subject = model.Subject,
TemplateId = model.TemplateId
},
GetPlaceholdersSerialized(model),
attach.ContentStream);
I've tried even more excentric approach, but still no success.
var httpResponse = new HttpResponseMessage(HttpStatusCode.OK);
httpResponse.Content = new StreamContent(attachmentsStream);
httpResponse.Content.Headers.ContentType = new MediaTypeHeaderValue("application/zip");
httpResponse.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "download.zip"
};
var isSent = await _infoBipClient.SendMailAsync(
new MailPropertiesModel
{
Receiver = model.Receiver,
Subject = model.Subject,
TemplateId = model.TemplateId
},
GetPlaceholdersSerialized(model),
await httpResponse.Content.ReadAsStreamAsync());
Could you please help us out what we are missing ?
Later edit:
After digging a bit more in the Source Code I saw this code
private HttpContent PrepareMultipartFormDataContent(RequestOptions options)
{
string boundary = "---------" + Guid.NewGuid().ToString().ToUpperInvariant();
var multipartContent = new MultipartFormDataContent(boundary);
foreach (var formParameter in options.FormParameters)
multipartContent.Add(new StringContent(formParameter.Value), formParameter.Key);
if (options.FileParameters != null && options.FileParameters.Count > 0)
foreach (var fileParam in options.FileParameters)
{
var fileStreamName = fileParam.Value is FileStream fileStream
? Path.GetFileName(fileStream.Name)
: null;
var content = new StreamContent(fileParam.Value);
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
multipartContent.Add(content, fileParam.Key,
fileStreamName ?? "no_file_name_provided");
}
return multipartContent;
}
Can there be an extension method for StreamContent ? This would solve all the cases and give the developers flexibility regarding what they want to sent, because I think there are developers that are using In Memory file generation instead of saving on the server.
Thanks,
Mircea