如何通过uisng BiWeekly库和Java Mail API创建和发送对现有事件的更新? [英] How to create and send update to existing event by uisng BiWeekly library and Java Mail API?
问题描述
我正在使用 BiWeekly 库创建VEVENT，然后使用 Java Mail API .一切正常，但是如何为现有事件创建更新，即当我收到更新的VEVENT时，它不会在日历中创建新事件，而是会更新现有事件?
I'm using BiWeekly library to create VEVENT and then send it by using Java Mail API. Everything work fine but how can I create an update for an existing event, i.e. when I receive VEVENT which is update it won't create a new event in a calendar but will update an existing event?
我尝试以以下方式设置顺序event.setSequence(2)，但是它不起作用.收到电子邮件代理Lotus Notes后，Google邮件始终会创建新事件.
I've tried to set sequence in the following way event.setSequence(2) , but it doesn't work. Upon receive email agent, Lotus Notes, google mail always creates new event.
这是我创建和发送事件的代码:
This is my code of creating and sending event:
try {
String from = "email@example.com";
String to = "email@example.com";
Properties prop = new Properties();
prop.setProperty("mail.transport.protocol", "smtp");
prop.setProperty("mail.host", "smtp.example.com");
prop.setProperty("mail.user", "email");
prop.setProperty("mail.password", "");
Session session = Session.getDefaultInstance(prop, null);
// Define message
MimeMessage message = new MimeMessage(session);
message.addHeaderLine("method=REQUEST");
message.addHeaderLine("charset=UTF-8");
message.addHeaderLine("component=VEVENT");
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
message.setSubject("Message Subject");
StringBuffer sb = new StringBuffer();
/*EVENT START*/
VEvent event = new VEvent();
event.setUid("ANATOLYTARNAVSKY123");
event.setDescription("Invitation Description");
event.setSummary("Invitation Description");
event.setOrganizer("anatolyt@gmail.com");
event.setLocation("room");
event.setSequence(sequence);
Calendar start = Calendar.getInstance();
start.add(Calendar.HOUR_OF_DAY, sequence + 2);
Calendar end = Calendar.getInstance();
end.add(Calendar.HOUR_OF_DAY, sequence + 2);
event.setDateStart(start.getTime());
event.setDateEnd(end.getTime());
icals.addEvent(event);
WriterChainText text = Biweekly.write(icals);
String result = text.go();
System.out.println(result);
/*EVENT END*/
StringBuffer buffer = sb.append(result);
// Create the message part
BodyPart messageBodyPart = new MimeBodyPart();
// Fill the message
messageBodyPart.setHeader("Content-Class", "urn:content-classes:calendarmessage");
messageBodyPart.setHeader("Content-ID", "calendar_message");
messageBodyPart.setDataHandler(new DataHandler( new ByteArrayDataSource(buffer.toString(), "text/calendar")));// very important
// Create a Multipart
Multipart multipart = new MimeMultipart();
// Add part one
multipart.addBodyPart(messageBodyPart);
// Put parts in message
message.setContent(multipart);
// send message
Transport.send(message);
} catch (MessagingException me) {
me.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
}
在这里，我将放置用于发送邀请的代码的迭代:
谢谢.
更新1 :
这是我的代码和BiWeekly库生成的第一个和第二个VEVENT:
This is first and second VEVENT as generated by my code and BiWeekly library:
仅创建事件-事件数据:
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Michael Angstadt//biweekly 0.4.3//EN
METHOD:REQUEST
BEGIN:VEVENT
DTSTAMP:20151113T100301Z
UID:ANATOLYTARNAVSKY123
DESCRIPTION:Invitation Description
SUMMARY:Invitation Description
ORGANIZER:mailto:anatolyt@example.com
LOCATION:room
SEQUENCE:0
DTSTART:20151113T120301Z
DTEND:20151113T120301Z
END:VEVENT
END:VCALENDAR
更新事件-仅事件数据:
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Michael Angstadt//biweekly 0.4.3//EN
METHOD:REQUEST
BEGIN:VEVENT
DTSTAMP:20151113T100333Z
UID:ANATOLYTARNAVSKY123
DESCRIPTION:Invitation Description
SUMMARY:Invitation Description
ORGANIZER:mailto:anatolyt@example.com
LOCATION:room
SEQUENCE:1
DTSTART:20151113T130333Z
DTEND:20151113T130333Z
END:VEVENT
END:VCALENDAR
更新2 :
当我发送第一邀请和第二邀请时，我会在gmail上收到以下电子邮件:
When I send first and second invitation I get the following email on gmail:
完整的原始电子邮件内容，其中由于某些隐私问题而删除了tracerout路径:
The full original email content with removed tracerout path due to some privacy issues here:
创建事件-完整电子邮件，没有路由部分:
Date: Sat, 14 Nov 2015 08:03:47 -0700
From: anatolyt@example.com
To: anatolyt@gmail.com
Message-ID: *****
Subject: Escape Room Invitation
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_0_451111351.1447513426727"
X-TM-AS-MML: disable
X-Content-Scanned: Fidelis XPS MAILER
x-cbid: 15111415-0021-0000-0000-000004CDC424
method=REQUEST
charset=UTF-8
component=VEVENT
------=_Part_0_451111351.1447513426727
Content-Type: text/calendar; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Class: urn:content-classes:calendarmessage
Content-ID: calendar_message
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Michael Angstadt//biweekly 0.4.3//EN
METHOD:REQUEST
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20151114T150346Z
UID:anatolyt@example.com
STATUS:CONFIRMED
DESCRIPTION:Invitation Description
SUMMARY:Invitation Summary
ORGANIZER:mailto:anatolyt@example.com
LOCATION:Escape room
TRANSP:OPAQUE
CREATED:20151114T150346Z
LAST-MODIFIED:20151114T150346Z
SEQUENCE:0
DTSTART:20151114T170346Z
DTEND:20151114T170346Z
END:VEVENT
END:VCALENDAR
------=_Part_0_451111351.1447513426727--
更新事件-全电子邮件，没有路由部分:
Date: Sat, 14 Nov 2015 08:05:06 -0700
From: anatolyt@example.com
To: anatolyt@gmail.com
Message-ID: *****
Subject: Escape Room Invitation
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_Part_0_451111351.1447513506015"
X-TM-AS-MML: disable
X-Content-Scanned: Fidelis XPS MAILER
x-cbid: 15111415-0029-0000-0000-000004D409DF
method=REQUEST
charset=UTF-8
component=VEVENT
------=_Part_0_451111351.1447513506015
Content-Type: text/calendar; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Class: urn:content-classes:calendarmessage
Content-ID: calendar_message
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Michael Angstadt//biweekly 0.4.3//EN
METHOD:REQUEST
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTSTAMP:20151114T150505Z
UID:anatolyt@example.com
STATUS:CONFIRMED
DESCRIPTION:Invitation Description
SUMMARY:Invitation Summary
ORGANIZER:mailto:anatolyt@example.com
LOCATION:Escape room
TRANSP:OPAQUE
CREATED:20151114T150505Z
LAST-MODIFIED:20151114T150505Z
SEQUENCE:1
DTSTART:20151114T180505Z
DTEND:20151114T180505Z
END:VEVENT
END:VCALENDAR
------=_Part_0_451111351.1447513506015--
更新3 看起来它可以在Lotus Notes上正常工作，但Google日历仍然无法识别更新事件.
UPDATE 3 It looks that it works correctly on a Lotus Notes but Google Calendar still doesn't recognize an update event.
更新4-解决方案
正如@arnaudq所写，我错过了ATTENDEE属性来制作Google日历来识别更新事件.这是一个示例如何做:
As @arnaudq wrote I've missed ATTENDEE property to make a Google Calendar to recognise update event. Here is an example how to do it:
VEvent event = new VEvent();
...
Attendee attendee = new Attendee("Anatoly Tarnavsky", "anatolyt@gmail.com");
attendee.setRsvp(true);
attendee.setRole(Role.CHAIR);
attendee.setParticipationStatus(ParticipationStatus.CONFIRMED);
...
event.setProperty(attendee);
推荐答案
您的代码似乎未明确设置UID属性.因此，该库可能会为您生成一个新库.
Your code does not seem to explicitely set the UID property. As a consequence, the library probably generates a new one for you.
UID属性是识别此VEVENT的对象. 因此，您的更新应包含与先前发送的原始事件相同的UID值.
The UID property is what identifies this VEVENT amongst others. As a consequence, your update shall contain the same UID value as the original event that was sent earlier.
您还缺少至少一个ATTENDEE属性.参与者之一应将其值设置为与接收邀请的gmail电子邮件地址相对应的mailto uri.
You are also missing at least one ATTENDEE property. One of the ATTENDEE should have its value set as a mailto uri corresponding to the gmail email address that is receiving the invite.
这篇关于如何通过uisng BiWeekly库和Java Mail API创建和发送对现有事件的更新?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
