我已经实现了类似于以下问题的内容,我可以让它在我的服务器上本地工作,但是当我部署到 Azure 时,它不起作用。我没有收到任何错误:只是一封没有附件的电子邮件。
Sending attachments using Azure blobs
使用 SendGrid 发送的文件类型是否有限制(文件大小仅为 56k)? Azure App 服务是否必须处于特定级别,还是可以在 Basic 上完成? blob URL definitley 存在,并且我按照上一个问题中的建议将流设置为零。
MailMessage mm = new MailMessage("receiver address", "someone");
mm.From = new MailAddress("myAddress", "My Name");
mm.Subject = content.Subject;
mm.Body = content.Body;
mm.IsBodyHtml = true;
mm.BodyEncoding = UTF8Encoding.UTF8;
mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
var attachmentAsStream = _storageAccessService.GetAssetAsStreamForEmail("myContainer", "fileThatExists.pdf");
var attachment = new Attachment(attachmentAsStream, "File.pdf", MediaTypeNames.Application.Pdf);
mm.Attachments.Add(attachment);
public MemoryStream GetAssetAsStreamForEmail(string containerName, string fileName)
{
// Create the blob client.
CloudBlobClient blobClient = StorageAccountReference().CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
var memoryStream = new MemoryStream();
try
{
using (var stream = new MemoryStream())
{
blob.DownloadToStream(memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
}
}
catch (Exception ex)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(new Exception("Failed to download Email Atatchment: "+ ex.Message));
}
memoryStream.Position = 0;
return memoryStream;
}
using (SmtpClient client = new SmtpClient())
{
client.Port = 587;
client.Host = "smtp.sendgrid.net";
client.EnableSsl = true;
client.Timeout = 10000;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Credentials = new System.Net.NetworkCredential("hidden", "hidden");
await client.SendMailAsync(message);
}
<小时/>
更新
根据下面 Yasir 的建议进行更新。从 Azure 下载 blob 作为流似乎只能在本地工作。但是,如果我更改为以 ByteArray 形式下载,那么它在任何地方都可以工作......
public MemoryStream GetAssetAsStreamForEmail(string containerName, string fileName)
{
// Create the blob client.
CloudBlobClient blobClient = StorageAccountReference().CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
try
{
blob.FetchAttributes();
var fileStream = new byte[blob.Properties.Length];
for (int i = 0; i < blob.Properties.Length; i++)
{
fileStream[i] = 0x20;
}
blob.DownloadToByteArray(fileStream, 0) ;
MemoryStream bufferStream = new MemoryStream(fileStream);
}
catch (Exception ex)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(new Exception("Failed to download Email Atatchment: " + ex.Message));
}
return null;
}
最佳答案
以下代码适用于我使用 Azure 函数中的 Sendgrid 发送电子邮件。我附加了 Blob 存储中的 CSV 文件。它应该也适合你。您所要做的就是确保将 pdf 文件作为 byte[] 读取。
public interface IEmailAttachment
{
string Name { get; }
byte[] FileData { get; }
}
public static void Send(MailMessage mailMessage, IEnumerable<IEmailAttachment> attachments)
{
try
{
// Get the configuration data
string server = ConfigReader.EmailServer;
int port = ConfigReader.EmailPort;
string username = ConfigReader.SendGridUserName;
string password = ConfigReader.SendGridPassword;
smtpClient.EnableSsl = false;
smtpClient.Credentials = new NetworkCredential(username, password);
// Create the SMTP Client
SmtpClient smtpClient = new SmtpClient(server, port);
// Prepare the MailMessage
mailMessage.From = new MailAddress(ConfigReader.FromEmail);
var toEmails = ConfigReader.ToEmail.Split(',');
foreach (var toEmail in toEmails)
{
mailMessage.To.Add(toEmail);
}
var ccEmails = ConfigReader.EmailCc.Split(',');
foreach (var ccEmail in ccEmails)
{
mailMessage.CC.Add(ccEmail);
}
// Add attachments
List<MemoryStream> files = new List<MemoryStream>();
if (attachments != null)
{
foreach (IEmailAttachment file in attachments)
{
MemoryStream bufferStream = new MemoryStream(file.FileData);
files.Add(bufferStream);
Attachment attachment = new Attachment(bufferStream, file.Name);
mailMessage.Attachments.Add(attachment);
}
}
mailMessage.IsBodyHtml = true;
// Send the email
smtpClient.Send(mailMessage);
foreach (MemoryStream stream in files)
{
stream.Dispose();
}
}
catch (Exception)
{
throw;
}
}
关于azure - Azure 上缺少电子邮件附件,可在本地使用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49925744/