如何从Java中的MS Exchange Server以编程方式获取电子邮件标头？

Question

I can't get access to headers in email. At that moment I can get only ExtendedPropertyCollection object, but I don't know how to work with it.

ItemEvent item = (ItemEvent) event;
EmailMessage message = EmailMessage.bind(args.getSubscription().getService(), item.getItemId());
ExtendedPropertyCollection extendedProperties = ((ExtendedPropertyCollection) message.getExtendedProperties());

UPDATE:

The result code in Java looks like:

PropertySet propertySet = new PropertySet(BasePropertySet.FirstClassProperties, ItemSchema.MimeContent);
EmailMessage message = EmailMessage.bind(args.getSubscription().getService(), item.getItemId(), propertySet);
String emailTextWithHeaders = new String(message.getMimeContent().getContent());

Answer 1

There are two ways to do that you should be able to access the InternetMessageHeader collection vai the EmailMessage class https://github.com/OfficeDev/ews-java-api/blob/master/src/main/java/microsoft/exchange/webservices/data/InternetMessageHeader.java

The other way is to use the PR_TRANSPORT_MESSAGE_HEADERS extended property eg

ExtendedPropertyDefinition PR_TRANSPORT_MESSAGE_HEADERS = new ExtendedPropertyDefinition(0x007D, MapiPropertyType.String);
PropertySet psPropSet = new PropertySet(BasePropertySet.FirstClassProperties) { PR_TRANSPORT_MESSAGE_HEADERS};
EmailMessage message = EmailMessage.bind(args.getSubscription().getService(), item.getItemId(),psPropSet);

Cheers Glen