MailKit:如何循环访问最近的电子邮件以获取具有给定主题的电子邮件

Question

我正在使用.NET core 2.1创建一个框架。我使用MailKit并尝试了几种方法，如他们的页面和StackOverflow中所述，但仍然没有运气。

到目前为止，我能够获取最近消息的 UID，但似乎无法遍历列表以获取具有特定主题的电子邮件。

测试调用该方法：

Core core = new Core(driver);
bool isEmailPresent = core.EnsureUnreadEmailExists("Your application details" , "emailAddress");
Assert.True(isEmailPresent);

核心(类(：

public bool EnsureUnreadEmailExists(string emailSubject, string emailBox)
{
bool emailExists = true;
//start stopwatch to monitor elapsed time
Stopwatch sw = Stopwatch.StartNew();
//long maximumTimeout = 180000; //exit loop when maximumTimeout is reached
long maximumTimeout = 10000; //exit loop when maximumTimeout is reached

int sleepWait = 500;
//check if email exists and is readable
while (CheckEmailExistsAndIsReadable(GetGmailMessage(emailBox), emailSubject) && sw.ElapsedMilliseconds <= maximumTimeout)
{
//loop until email has arrived and is activated or maximumTimeout exceeded
Thread.Sleep(sleepWait);
Console.WriteLine("Time elapsed : {0}ms", sw.ElapsedMilliseconds);
}

try
{
//try
emailExists = false;
}
catch (Exception ae)
{
//exception message
emailExists = false;
}
sw.Stop();
return emailExists;
}
private IList<UniqueId> GetGmailMessage(string emailBox)
{
// Switch on the string - emailBox.
switch (emailBox.ToUpper())
{
case "emailAddress1":
GMailHandler gmh1 = new GMailHandler("imap.gmail.com", 993, true,
"emailAddress", "password");
return gmh1.GetRecentEmails();
default:
throw new Exception("Mail box not defined");
}

}

GMailHandler (Class(

public GMailHandler(string mailServer, int port, bool ssl, string login, string password)
{
if (ssl)
Client.Connect(mailServer, port);
else
Client.Connect(mailServer, port);
Client.Authenticate(login, password);
Client.Inbox.Open(FolderAccess.ReadOnly);
}

public IList<UniqueId> GetRecentEmails()
{
IList<UniqueId> uids = client.Inbox.Search(SearchQuery.Recent);
return uids;
}

方法(在核心类中(我无法完成循环访问 UID 以获取具有给定主题的电子邮件

public static bool CheckEmailExistsAndIsReadable(IList<UniqueId> uids, string emailSubject)
{
try
{
Console.WriteLine("Attempt to read email messages .....");
string htmlBody = "";
string Subject = "";
bool EmailExists = false;
foreach (UniqueId msgId in uids)
{
//Incomplete
if (msgId.)
{
htmlBody = email.BodyHtml.Text;
Subject = email.Subject.ToString();
Console.WriteLine("Subject: " + Subject);
Match match = Regex.Match(Subject, emailSubject);
Console.WriteLine("match: " + match.Groups[0].Value.ToString());
if (match.Success)
{
Console.WriteLine("Email exists with subject line: " + emailSubject);
EmailExists = true;
}
break;
}

}
if (EmailExists)
{
//email found so exit poll
Console.WriteLine("email found return false ");
return false;
}
else
{
//email not found so contiue to poll
Console.WriteLine("email not found return true ");
return true;
}


}
catch (IOException)
{
//the email with specific subject line has not yet arrived:
//may be still in transit
//or being processed by another thread
//or does not exist (has already been processed)
Console.WriteLine("Email has not arrived or still in transit. Continue to poll ... ");
return true;
}

}

我想做的是添加一两个类并具有可重用的方法，以便我可以在将来的任何测试中使用这些方法。 1.访问Gmail并验证是否存在具有特定主题的电子邮件 2. 从该电子邮件中提取某些内容(例如安全 PIN 码(并将其添加到文本文件中。 3. 检查电子邮件内容

Answer 1

你可以尝试类似的东西

public GMailHandler(string mailServer, int port, bool ssl, string login, string password)
{
if (ssl)
{
client.Connect(mailServer, port);
}
else
client.Connect(mailServer, port);
client.Authenticate(login, password);
inbox = client.Inbox;
}

public IEnumerable<string> GetEmailWithSubject (string emailSubject)
{
var messages = new List<string>();

inbox.Open(FolderAccess.ReadWrite);
var results = inbox.Search(SearchOptions.All, SearchQuery.Not(SearchQuery.Seen));
foreach (var uniqueId in results.UniqueIds)
{
var message = client.Inbox.GetMessage(uniqueId);

if (message.Subject.Contains(emailSubject))
{
messages.Add(message.HtmlBody);
}

//Mark message as read
inbox.AddFlags(uniqueId, MessageFlags.Seen, true);
}

client.Disconnect(true);

return messages;
}

Answer 2

您可以遍历 uid 并下载如下消息：

foreach (uid in uids) {
var message = client.GetMessage (uid);
if (message.Subject == subject) {
// we found the message
}
}

或者你可以更有效率，使用这样的方法：

var uids = client.Inbpx.Search (SearchQuery.SubjectContains (subject).And (SearchQuery.Recent));

如果 uids。计数> 0，则消息存在。

下载消息后，您可以遍历所有身体部位并像这样提取它们：

foreach (var part in message.BodyParts.OfType<MimePart> ()) {
var fileName = part.FileName;
using (var stream = File.Create (fileName)) {
part.Content.DecodeTo (stream);
}
}