public async Task Authentification(ServerAccount mailServer)
{
mailServer.ServerStatus = GoodState;
string token = "";
HttpResponseMessage response;
//#1 try connect to server
try
{
//go to login page
response = await client.GetAsync("http://" + mailServer.Server + "/webmail/");
var responseContent = await response.Content.ReadAsStringAsync();
//try get token from answer
token = GetToken(responseContent);
if (token == "")
{
var err = "Can't find token in server answer. Work with server unpossible";
mailServer.ServerStatus = err;
throw new Exception(err);
}
}
catch (Exception ex)
{
mailServer.ServerStatus = ex.Message;
throw ex;
}
//#2 try authentificate user on server
try
{
//set auth param for url
var data = new StringContent(
$"_token={token}&_task=login&_action=login&_timezone=Europe%2FMoscow&_url=" +
$"&_user={HttpUtility.UrlEncode(mailServer.Login)}" +
$"&_pass={HttpUtility.UrlEncode(mailServer.Pass)}",
Encoding.UTF8,
"application/x-www-form-urlencoded"
);
//auth request
response = await client.PostAsync($"http://{mailServer.Server}/webmail/?_task=login", data);
var responseContent = await response.Content.ReadAsStringAsync();
//check success authorization
if (responseContent.Contains("mbox=INBOX"))
{
mailServer.AccountStatus = GoodState;
return;
}
//try understand what happand with authorization
CheckAuthorizStatus(responseContent, response, mailServer);
}
catch (Exception ex)
{
mailServer.AccountStatus = ex.Message;
throw ex;
}
}
public async Task CheckAuth(ServerAccount account)
{
//if auth will fale this method return exception and write error to account's status field
try
{
await _sendService.Authentification(account);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
//this method can accept null hidden value and convert it to empty string
public async Task SendMail(ServerAccount account, Receiver receiver, Receiver hiddenReceiver, Letter letter)
{
try
{
Validator.ChekParams(receiver, hiddenReceiver, letter);
//if exist some problem we will write errors to status of instance
await _sendService.SendAsync(account, receiver.EmailAddress, hiddenReceiver?.Status ?? "",
letter.Subject, letter.Text);
//if some error exist it write to server's status
}catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
public async Task SendAsync(ServerAccount mailServer, string receiver, string hiddenReceiver, string subject, string mailText)
{
//go to compose mail
var response = await client.GetAsync($"http://{mailServer.Server}/webmail/?_task=mail&_action=compose");
var responseContent = await response.Content.ReadAsStringAsync();
//check auth
//session can live only limit time and sometimes we should make authorization again
if (responseContent.Contains("task=login"))
{
await Authentification(mailServer);
response = await client.GetAsync($"http://{mailServer.Server}/webmail/?_task=mail&_action=compose");
responseContent = await response.Content.ReadAsStringAsync();
if (responseContent.Contains("task=login"))
{
mailServer.ServerStatus = $"Can't compose letter status code {response.StatusCode.ToString()}";
throw new Exception(mailServer.ServerStatus);
}
}
//Set all parametrs to post request
string id = GetId(responseContent);
string token = GetToken(responseContent);
StringContent fieldsData = new StringContent(
$"_token={token}" +
$"&_task=mail&_action=send&_id={id}" +
$"&_attachments=&_from=1&_to={receiver}" +
$"&_cc={hiddenReceiver}" +
$"&_bcc={hiddenReceiver}" +
"&_replyto=&_followupto=" +
$"&_subject={subject}" +
"&editorSelector=plain&_priority=0&_store_target=Sent&_draft_saveid=&_draft=&_is_html=0&_framed=1" +
$"&_message={mailText}",
Encoding.UTF8,
"application/x-www-form-urlencoded");
// send requiest
response = await client.PostAsync("http://" + mailServer.Server + "/webmail/?_task=mail&_unlock=loading" + TUnix.Timestamp().ToString() + "&_framed=1&_lang=en_US", fieldsData);
if (response.StatusCode != HttpStatusCode.OK)
{
mailServer.ServerStatus = $"Sending error to email: {receiver}, server answer status:{response.StatusCode.ToString()}";
throw new Exception(mailServer.ServerStatus);
}
responseContent = await response.Content.ReadAsStringAsync();
//check success send message from server
if (responseContent.Contains("sent_successfully"))
{
mailServer.ServerStatus = GoodState;
}
else
{
Regex rgx = new Regex("(?<=display_message\\().*?(?=\\);)");
var match = rgx.Match(responseContent);
if (match.Success)
{
mailServer.ServerStatus =
$"Sending error to email: {receiver}, server answer:{match.Value}";
}
else
{
mailServer.ServerStatus = $"Sending error to email: {receiver}";
}
throw new Exception(mailServer.ServerStatus);
}
}
private void CheckAuthorizStatus(string responseContent, HttpResponseMessage response, ServerAccount account)
{
//wrong credy
if (responseContent.Contains("task=login"))
{
throw new Exception("Can't authorize: wrong login or password");
}
//server's error
if (response.StatusCode == HttpStatusCode.InternalServerError)
{
throw new Exception("Server's internal error");
}
//unknown problem
throw new Exception(response.StatusCode.ToString());
}