/**
* Detects the current-user-principal for a given WebDavResource. At first, /.well-known/ is
* tried. Only if no current-user-principal can be detected for the .well-known location, the
* given location of the resource is tried.
*
* @param serverInfo Location that will be queried
* @param serviceName Well-known service name ("carddav", "caldav")
* @return WebDavResource of current-user-principal for the given service, or null if it can't be
* found
* <p>TODO: If a TXT record is given, always use it instead of trying .well-known first
*/
WebDavResource getCurrentUserPrincipal(ServerInfo serverInfo, String serviceName)
throws URISyntaxException, IOException, NotAuthorizedException {
URI initialURL = getInitialContextURL(serverInfo, serviceName);
if (initialURL != null) {
Log.i(
TAG,
"Looking up principal URL for service "
+ serviceName
+ "; initial context: "
+ initialURL);
// determine base URL (host name and initial context path)
WebDavResource base =
new WebDavResource(
httpClient,
initialURL,
serverInfo.getUserName(),
serverInfo.getPassword(),
serverInfo.isAuthPreemptive());
// look for well-known service (RFC 5785)
try {
WebDavResource wellKnown = new WebDavResource(base, "/.well-known/" + serviceName);
wellKnown.propfind(Mode.CURRENT_USER_PRINCIPAL);
if (wellKnown.getProperties().getCurrentUserPrincipal() != null) {
URI principal = wellKnown.getProperties().getCurrentUserPrincipal();
Log.i(TAG, "Principal URL found from Well-Known URI: " + principal);
return new WebDavResource(wellKnown, principal);
}
} catch (NotAuthorizedException e) {
Log.w(TAG, "Not authorized for well-known " + serviceName + " service detection", e);
throw e;
} catch (URISyntaxException e) {
Log.e(
TAG,
"Well-known" + serviceName + " service detection failed because of invalid URIs",
e);
} catch (HttpException e) {
Log.d(TAG, "Well-known " + serviceName + " service detection failed with HTTP error", e);
} catch (DavException e) {
Log.w(
TAG,
"Well-known " + serviceName + " service detection failed with unexpected DAV response",
e);
} catch (IOException e) {
Log.e(TAG, "Well-known " + serviceName + " service detection failed with I/O error", e);
}
// fall back to user-given initial context path
Log.d(TAG, "Well-known service detection failed, trying initial context path " + initialURL);
try {
base.propfind(Mode.CURRENT_USER_PRINCIPAL);
if (base.getProperties().getCurrentUserPrincipal() != null) {
URI principal = base.getProperties().getCurrentUserPrincipal();
Log.i(TAG, "Principal URL found from initial context path: " + principal);
return new WebDavResource(base, principal);
}
} catch (NotAuthorizedException e) {
Log.e(TAG, "Not authorized for querying principal", e);
throw e;
} catch (HttpException e) {
Log.e(TAG, "HTTP error when querying principal", e);
} catch (DavException e) {
Log.e(TAG, "DAV error when querying principal", e);
}
Log.i(
TAG,
"Couldn't find current-user-principal for service "
+ serviceName
+ ", assuming initial context path is principal path");
return base;
}
return null;
}
