【helpdesk】启明星helpdesk7.0版本里，实现邮件提交功能介绍和原理
在启明星helpdesk7.0版本里，新增了一个功能：邮件提交。所谓邮件提交就是用户直接发送邮件到IT。当然IT通常会公开一个公共邮件，例如support@dotnetcms.org.下面介绍一下启明星Helpdesk邮件提交的功能介绍，稍后介绍实现原理。
1.用户通过邮件发送邮件到 test@dotnetcms.org 提交问题。
2.系统接收到邮件后，将会自动发出一封回复。回复的时间间隔最长10分钟。邮件会提醒用户您的邮件已经收到。用户可以直接回复邮件或点击链接查看问题或补充。
3.管理员/用户也可以通过helpdesk直接回复,这些回复会以邮件的形式告诉给用户。
4.用户也可以通过helpdesk查看提交的问题。
技术实现：
在整个邮件提交过程中，核心部分是邮件的接收和发送。目前几乎所有邮件都支持SMTP/POP协议。所有使用这个协议就可以获取或者发送邮件。
另外，在我们实现的过程中，部分企业使用的是Exchange2007.对于微软这个邮件服务器，许多企业默认是不启用SMTP/POP协议，微软使用的Exchange
web service（EWS）接口发送或者接收邮件，所以我们提供了两种方式：SMTP/POP方式和EWS方式。
（注：对于Exchange2003，微软还支持webdav方式，但是在exchange2007不推荐使用该方式。所以我们没有再考虑exchange2003情况，如果您使用的是exchange2003，可以开启SMTP/POP协议）
SMTP发送邮件核心代码：
SmtpClient smtpClient = new SmtpClient();
MailMessage message = new MailMessage();
MailAddress fromAddress = new MailAddress(mail, friendlyname);
smtpClient.Host = smtp;
smtpClient.Port = int.Parse(smtp_port);
NetworkCredential nc = new NetworkCredential(username, password);
smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = nc;
smtpClient.EnableSsl = smtp_use_ssl;
message.From = fromAddress;
if (email != "")
{
message.To.Add(_email);
}
if (_sendto != "")
{
message.CC.Add(_sendto);
}
message.Subject = title;
message.IsBodyHtml = true;
message.Body = content;
smtpClient.Send(message);
SMTP接收邮件
接收邮件使用了OpenPOP.dll
https://files.cnblogs.com/mqingqing123/OpenPop.rar
using (Pop3Client client = new Pop3Client())
{
client.Connect(pop, int.Parse(pop_port), pop_use_ssl);
client.Authenticate(username, password);
int messageCount = client.GetMessageCount();
List<OpenPop.Mime.Message> allMessages;
if (messageCount > maxcount)
{
allMessages = new List<OpenPop.Mime.Message>(maxcount);
Max = maxcount;
}
else
{
allMessages = new List<OpenPop.Mime.Message>(messageCount);
Max = messageCount;
}
处理邮件的代码
public static void ProcessEmail(OpenPop.Mime.Message msg, DateTime baseTime) { email = msg.Headers.From.Address; createdate = msg.Headers.DateSent.AddHours(timezone); title = msg.Headers.Subject; MessagePart html = msg.FindFirstHtmlVersion(); if (html != null) { contents = html.GetBodyAsText(); } }
采用EWS方式：
public static void GetOutlookEmail()
{
DateTime basicTime = DateTime.Now.AddMinutes(-10);
string username = Helper.GetWebconfig("username");
string password = Helper.GetWebconfig("password");
string domain = Helper.GetWebconfig("domain");
string url = Helper.GetWebconfig("exchangewebservice");
int timezone = int.Parse(Helper.GetWebconfig("timezone"));
int maxcount = int.Parse(Helper.GetWebconfig("every_time_fetch_max_count"));
ExchangeServiceBinding esb = new ExchangeServiceBinding();
esb.Credentials = new NetworkCredential(username, password, domain);
esb.Url = url;
FindItemType findItemRequest = new FindItemType();
findItemRequest.Traversal = ItemQueryTraversalType.Shallow;
ItemResponseShapeType itemProperties = new ItemResponseShapeType();
////获取邮件地址
PathToExtendedFieldType PidTagSenderSmtpAddress = new PathToExtendedFieldType();
PidTagSenderSmtpAddress.PropertyTag = "0x5D01";
PidTagSenderSmtpAddress.PropertyType = MapiPropertyTypeType.String;
// Define which item properties are returned in the response
itemProperties.BaseShape = DefaultShapeNamesType.AllProperties;
findItemRequest.ItemShape = itemProperties; // Add properties shape to request
itemProperties.AdditionalProperties = new BasePathToElementType[1];
itemProperties.AdditionalProperties[0] = PidTagSenderSmtpAddress;
// Identify which folders to search to find items
DistinguishedFolderIdType[] folderIDArray = new DistinguishedFolderIdType[1];
folderIDArray[0] = new DistinguishedFolderIdType();
folderIDArray[0].Id = DistinguishedFolderIdNameType.inbox;
// Add folders to request
findItemRequest.ParentFolderIds = folderIDArray;
//Create unread only restriction --------------------------
RestrictionType restriction = new RestrictionType();
IsEqualToType isEqualTo = new IsEqualToType();
PathToUnindexedFieldType pathToFieldType = new PathToUnindexedFieldType();
pathToFieldType.FieldURI = UnindexedFieldURIType.messageIsRead;
FieldURIOrConstantType constantType = new FieldURIOrConstantType();
ConstantValueType constantValueType = new ConstantValueType();
constantValueType.Value = "0";
constantType.Item = constantValueType;
isEqualTo.Item = pathToFieldType;
isEqualTo.FieldURIOrConstant = constantType;
restriction.Item = isEqualTo;
findItemRequest.Restriction = restriction;
FindItemResponseType findItemResponse = esb.FindItem(findItemRequest);
FindItemResponseMessageType folder = (FindItemResponseMessageType)findItemResponse.ResponseMessages.Items[0];
ArrayOfRealItemsType folderContents = new ArrayOfRealItemsType();
folderContents = (ArrayOfRealItemsType)folder.RootFolder.Item;
ItemType[] items = folderContents.Items;
int count = items.Length;
int Max = 0;
if (count > maxcount)
{
Max=maxcount;
}
else
{
Max = count;
}
int c = 0;
for (int i = Max; c < Max; i--)
{
try
{
ProcessEmail(items[i-1], basicTime);
}
catch(Exception ex)
{
WriteLog(ex.ToString());
}
c++;
}
}
最后处理获取的邮件
////// 获取邮件的内容 //
GetItemType g = new GetItemType();
g.ItemShape = new ItemResponseShapeType();
g.ItemShape.BaseShape = DefaultShapeNamesType.AllProperties;
g.ItemIds = new BaseItemIdType[] { itemType.ItemId };
GetItemResponseType p_mailResponse = esb.GetItem(g);
ArrayOfResponseMessagesType arrMail = p_mailResponse.ResponseMessages;
ResponseMessageType[] responseMessages = arrMail.Items;
foreach (ResponseMessageType respmsg in responseMessages)
{
if (respmsg is ItemInfoResponseMessageType)
{
ItemInfoResponseMessageType createItemResp = (respmsg as ItemInfoResponseMessageType);
ArrayOfRealItemsType aorit = createItemResp.Items;
foreach (MessageType myMessage in aorit.Items)
{
if (myMessage.Body.BodyType1 == BodyTypeType.Text)
{
contents = myMessage.Body.Value.Replace(Environment.NewLine, "<br />");
}
else
{
contents = myMessage.Body.Value;
}
if (myMessage.From != null)
{
email = myMessage.From.Item.EmailAddress;
}
}
}
}
采用EWS发送邮件的核心代码
emailMessage.Subject = title;
emailMessage.Body = new BodyType();
emailMessage.Body.BodyType1 = BodyTypeType.HTML; //specify HTML or plain
emailMessage.Body.Value = contents;
CreateItemType emailToSave = new CreateItemType();
emailToSave.Items = new NonEmptyArrayOfAllItemsType();
emailToSave.Items.Items = new ItemType[1];
emailToSave.Items.Items[0] = emailMessage;
emailToSave.MessageDisposition = MessageDispositionType.SendAndSaveCopy;
emailToSave.MessageDispositionSpecified = true;
try
{
CreateItemResponseType response = esb.CreateItem(emailToSave);
ResponseMessageType[] rmta = response.ResponseMessages.Items;
}
catch(Exception ex)
{
WriteLog(ex.ToString());
}
