Sending Mails In Aspnetcore
source link: https://www.yvesdennels.com/posts/sending-mails-aspnetcore/
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
Sending Mails In Aspnetcore
This post is part of series starting here.
Here’s how I configure my mailers in a ASP.Net Core project developed in F#. I define an interface:
type IMailer =
// to * subject * body
abstract Send: string * string * string -> unit
of which I have 2 implementation. The first one is for development as it simply prints the mail on the server’s standard output:
type ConsoleMailer() =
interface IMailer with
member _.Send(recipient, subject, body) =
printfn "Sending mail:\nTo:%s\nSubject:%s\n%s" recipient subject body
The second implementation is for production:
open MailKit.Net.Smtp
open MailKit
open MimeKit
type ProductionMailer(host:string, port:int, login:string,password:string) =
interface IMailer with
member _.Send(recipient, subject, body) =
let message = new MimeMessage()
message.From.Add (new MailboxAddress ("ProjectName", "[email protected]"))
message.To.Add (new MailboxAddress ("", recipient));
message.Subject <- subject
message.Body <- new TextPart("plain",Text=body)
try
let client = new SmtpClient()
client.Connect(host,port,true)
client.Authenticate(login,password)
client.Send(message)|> ignore
client.Disconnect(true)
with e ->
printfn "Exception: %A" e
and its config is set in a JSON file handled by this code:
open FSharp.Data
type MailConfig = JsonProvider<"config/mail.json.sample", EmbeddedResource="lib, lib.embedded.mail.json.sample">
It uses a type provider using the project’s provided sample config file, which is
{
"host":"mail.example.com",
"port": 25,
"login": "username",
"password": "superpass"
}
With all building block available, we can then inject them in the application in the Startup class' ConfigureServices method.
if env.IsDevelopment() then
services.AddTransient<IMailer,ConsoleMailer>() |> ignore
else
let mailConfigFile = Environment.GetEnvironmentVariable("WADESDA_MAIL_CONFIG_FILE")
if not (isNull mailConfigFile) && System.IO.File.Exists(mailConfigFile) then
let mailConfig = MailConfig.Load(mailConfigFile)
let mailer =
ProductionMailer(mailConfig.Host,
mailConfig.Port,
mailConfig.Login,
mailConfig.Password
)
services.AddTransient<IMailer>(fun s -> mailer :> IMailer) |> ignore
We inject the dependency as transient so that every request for an instance gets a new one. And that’s it. In the app, you fist need to get a handle on the mailer. In WebSharper, you do it like this:
let httpContext:Microsoft.AspNetCore.Http.HttpContext = ctx.HttpContext()
let serviceProvider= httpContext.RequestServices
let mailer = serviceProvider.GetService(typeof<IMailer>)
Sending a mail is then done like this:
mailer.Send(emailAddress,subject, body)
Recommend
About Joyk
Aggregate valuable and interesting links.
Joyk means Joy of geeK