Hi!,
您好吗?
I found Milan reply interesting but did not really hack on this,
您见不见了?
Cheers
Pierre-Yves
Milan Crha mc...@redhat.com writes:
On Tue, 2014-08-19 at 16:34 +0800, Chunyang Xu wrote:
Hi all!
I want to adding email as storage supporting for a GNOME app, named
bijiben. With this feature users can read save notes to their
email box (a folder like Notes). But I do not how to use the Camel
library to access email folders. I have two question:
1. How to authenticate user with gnome-online-accounts? I can get
user
name, IMAP server address etc via gnome-online-accounts.
2. How to operate email like files and folders, i.e, how to download
/
update / upload files between email service and local? Is it possible
to sync a local folder to a email folder like INBOX?
Hi,
the evolution-data-server (its evolution-source-registry D-Bus
service) provides a list of configured sources, which can be
calendars, address books, mail accounts and so on. Many things are
referenced by source (ESource) uids (e_source_get_uid()) in the code.
More about ESource-s can be found here [1][2].
These are used also by Camel [3][4]. Even the Wiki pages are a little
bit outdated, the principle is still the same. You should provide your
own descendant of CamelSession, which holds list of configured mail
accounts (added by camel_session_add_service(), got by
camel_session_ref_service()). The service can be either CamelStore or
CamelTransport descendant. The CamelStore provides you with a list of
CamelFolder-s and so on. The CamelService lets you connect to the
server.
I guess the simplest way is to borrow Evolution's implementation of
CamelSession, the EMailSession [5], and build on top of it - at least
as a starter. If your mail account is configured through GOA and you
have evolution-data-server compiled with GOA module, then the account
will be automatically available for you. Getting the account's ESource
(and its uid) is a little bit tricky. You should let the users pick
which account to use, rather than guess which of the 5 different GOA
configured mail accounts to use. Supposing you know the uid of the
chosen mail account you can do something like this:
#include libemail-engine/libemail-engine.h
...
EMailSession *session;
ESourceRegistry *registry;
CamelService *service;
CamelStore *store;
CamelFolder *folder;
GError *error = NULL;
registry = e_source_registry_new_sync (cancellable, error);
if (!registry) {
// do something with 'error' and free it
return;
}
session = e_mail_session_new (registry);
g_object_unref (registry);
service = camel_session_ref_service (CAMEL_SESSION (session), uid);
if (!service) {
g_warning (Cannot open service '%s', uid);
g_object_unref (session);
return;
}
if (!CAMEL_IS_STORE (service)) {
g_warning (Cannot open service '%s', uid);
g_object_unref (service);
g_object_unref (session);
return;
}
store = CAMEL_STORE (service);
if (!camel_service_connect_sync (service, cancellable, error)) {
// do something with 'error' and free it
g_object_unref (service);
g_object_unref (session);
return;
}
folder = camel_store_get_folder_sync (store, INBOX/sub-folder, 0,
cancellable, error);
// alternatively for Inbox itself:
// folder = camel_store_get_inbox_folder_sync (store, cancellable, error);
if (!folder) {
// do something with 'error' and free it
g_object_unref (service);
g_object_unref (session);
return;
}
// to get up-to-date folder content
if (!camel_folder_synchronize_sync (folder, 0, cancellable, error) ||
!camel_folder_refresh_info_sync (folder, cancellable, error)) {
// do something with 'error' and free it
g_object_unref (service);
g_object_unref (session);
return;
}
// do something with the 'folder' [6]
g_object_unref (service);
g_object_unref (session);
Note I used sync versions of the functions only for its simplicity,
you might run the code in a dedicated thread or use async functions,
to not get your UI/main thread blocked by a remote call. Also note
that connecting to the service each time you want to manipulate folder
content is not efficient, the network I/O or large folder update can
take significant amount of time.
Hope it helps,
Milan
[1] https://wiki.gnome.org/Apps/Evolution/ESourceFileFormat
[2] https://wiki.gnome.org/Apps/Evolution/ESourceMigrationGuide
[3] http://developer.gnome.org/camel/unstable
[4] https://wiki.gnome.org/Apps/Evolution/Camel
[5]
https://git.gnome.org/browse/evolution/tree/libemail-engine/e-mail-session.h
[6] https://developer.gnome.org/camel/unstable/CamelFolder.html
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