如何在不嵌入凭据的情况下使用 Mailer？-解网

问：

您好，我正在尝试制作一项服务，用户可以将电子邮件发送到预设位置。例如，用户可以发送有关任何错误的电子邮件，但它不使用自己的电子邮件，而是使用应用程序中预设的电子邮件。

我正在尝试使用邮件应用程序，并且在 api 文档中，出于安全原因，它说不要直接在代码中输入您的凭据。它提到 Johanness Milke 有一个关于如何做到这一点的指南，但我无法通过搜索他的 repo 甚至通过在线谷歌搜索在任何地方找到它。有谁知道如何在不嵌入凭据的情况下使用邮件程序。

邮件程序示例取自软件包网站

我不想嵌入-----行中的部分（用户名/密码）

import 'package:mailer/mailer.dart';
import 'package:mailer/smtp_server.dart';

main() async {
  // Note that using a username and password for gmail only works if
  // you have two-factor authentication enabled and created an App password.
  // Search for "gmail app password 2fa"
  // The alternative is to use oauth.
-------------------------------------------------------------------------------
  String username = '[email protected]';
  String password = 'password';
-------------------------------------------------------------------------------

  final smtpServer = gmail(username, password);
  // Use the SmtpServer class to configure an SMTP server:
  // final smtpServer = SmtpServer('smtp.domain.com');
  // See the named arguments of SmtpServer for further configuration
  // options.  

  // Create our message.
  final message = Message()
    ..from = Address(username, 'Your name')
    ..recipients.add('[email protected]')
    ..ccRecipients.addAll(['[email protected]', '[email protected]'])
    ..bccRecipients.add(Address('[email protected]'))
    ..subject = 'Test Dart Mailer library :: 😀 :: ${DateTime.now()}'
    ..text = 'This is the plain text.\nThis is line 2 of the text part.'
    ..html = "<h1>Test</h1>\n<p>Hey! Here's some HTML content</p>";

  try {
    final sendReport = await send(message, smtpServer);
    print('Message sent: ' + sendReport.toString());
  } on MailerException catch (e) {
    print('Message not sent.');
    for (var p in e.problems) {
      print('Problem: ${p.code}: ${p.msg}');
    }
  }
  // DONE


  // Let's send another message using a slightly different syntax:
  //
  // Addresses without a name part can be set directly.
  // For instance `..recipients.add('[email protected]')`
  // If you want to display a name part you have to create an
  // Address object: `new Address('[email protected]', 'Display name part')`
  // Creating and adding an Address object without a name part
  // `new Address('[email protected]')` is equivalent to
  // adding the mail address as `String`.
  final equivalentMessage = Message()
    ..from = Address(username, 'Your name 😀')
    ..recipients.add(Address('[email protected]'))
    ..ccRecipients.addAll([Address('[email protected]'), '[email protected]'])
    ..bccRecipients.add('[email protected]')
    ..subject = 'Test Dart Mailer library :: 😀 :: ${DateTime.now()}'
    ..text = 'This is the plain text.\nThis is line 2 of the text part.'
    ..html = '<h1>Test</h1>\n<p>Hey! Here is some HTML content</p><img src="cid:[email protected]"/>'
    ..attachments = [
      FileAttachment(File('exploits_of_a_mom.png'))
        ..location = Location.inline
        ..cid = '<[email protected]>'
    ];

  final sendReport2 = await send(equivalentMessage, smtpServer);

  // Sending multiple messages with the same connection
  //
  // Create a smtp client that will persist the connection
  var connection = PersistentConnection(smtpServer);

  // Send the first message
  await connection.send(message);

  // send the equivalent message
  await connection.send(equivalentMessage);

  // close the connection
  await connection.close();
}

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