EWS: implement failover on OWA authentication failure (e.g. with outlook.com)

git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@1521 3d1905a2-6b24-0410-a738-b14d5a86fcbd

src/java/davmail/exchange/ExchangeSession.java

@@ -119,7 +119,7 @@ public abstract class ExchangeSession {
     protected String currentMailboxPath;
     protected final HttpClient httpClient;
 
-    private final String userName;
+    protected final String userName;
 
     protected String serverVersion;
 
@@ -429,15 +429,7 @@ public abstract class ExchangeSession {
         return logonMethod;
     }
 
-    protected HttpMethod formLogin(HttpClient httpClient, HttpMethod initmethod, String userName, String password) throws IOException {
+    protected HttpMethod postLogonMethod(HttpClient httpClient, HttpMethod logonMethod, String userName, String password) throws IOException {
-        LOGGER.debug("Form based authentication detected");
-
-        HttpMethod logonMethod = buildLogonMethod(httpClient, initmethod);
-        if (logonMethod == null) {
-            LOGGER.debug("Authentication form not found at " + initmethod.getURI() + ", trying default url");
-            logonMethod = new PostMethod("/owa/auth/owaauth.dll");
-        }
-
         // make sure username and password fields are empty
         ((PostMethod) logonMethod).removeParameter(userNameInput);
         ((PostMethod) logonMethod).removeParameter(passwordInput);
@@ -480,6 +472,18 @@ public abstract class ExchangeSession {
             // need to submit form
             logonMethod = submitLanguageSelectionForm(logonMethod);
         }
+        return logonMethod;
+    }
+
+    protected HttpMethod formLogin(HttpClient httpClient, HttpMethod initmethod, String userName, String password) throws IOException {
+        LOGGER.debug("Form based authentication detected");
+
+        HttpMethod logonMethod = buildLogonMethod(httpClient, initmethod);
+        if (logonMethod == null) {
+            LOGGER.debug("Authentication form not found at " + initmethod.getURI() + ", trying default url");
+            logonMethod = new PostMethod("/owa/auth/owaauth.dll");
+        }
+        logonMethod = postLogonMethod(httpClient, logonMethod, userName, password);
 
         return logonMethod;
     }

src/java/davmail/exchange/ews/EwsExchangeSession.java

@@ -79,6 +79,21 @@ public class EwsExchangeSession extends ExchangeSession {
         super(url, userName, password);
     }
 
+    @Override
+    protected HttpMethod formLogin(HttpClient httpClient, HttpMethod initmethod, String userName, String password) throws IOException {
+        LOGGER.debug("Form based authentication detected");
+
+        HttpMethod logonMethod = buildLogonMethod(httpClient, initmethod);
+        if (logonMethod == null) {
+            LOGGER.debug("Authentication form not found at " + initmethod.getURI() + ", will try direct EWS access");
+        } else {
+            logonMethod = postLogonMethod(httpClient, logonMethod, userName, password);
+        }
+
+        return logonMethod;
+    }
+
+
     /**
      * Check endpoint url.
      *
@@ -90,7 +105,9 @@ public class EwsExchangeSession extends ExchangeSession {
         getMethod.setFollowRedirects(false);
         try {
             int status = DavGatewayHttpClientFacade.executeNoRedirect(httpClient, getMethod);
-            if (status != HttpStatus.SC_MOVED_TEMPORARILY) {
+            if (status == HttpStatus.SC_UNAUTHORIZED) {
+                throw new DavMailAuthenticationException("EXCEPTION_AUTHENTICATION_FAILED");
+            } else if (status != HttpStatus.SC_MOVED_TEMPORARILY) {
                 throw DavGatewayHttpClientFacade.buildHttpException(getMethod);
             }
             // check Location
@@ -109,10 +126,19 @@ public class EwsExchangeSession extends ExchangeSession {
     @Override
     protected void buildSessionInfo(HttpMethod method) throws DavMailException {
         // no need to check logon method body
+        if (method != null) {
             method.releaseConnection();
-
+            // need to retrieve email and alias
-        // also need to retrieve email and alias
             getEmailAndAliasFromOptions();
+        } else {
+            // OWA authentication failed, get email address from login
+            if (userName.indexOf('@') >= 0) {
+                // userName is email address
+                email = userName;
+                alias = userName.substring(0, userName.indexOf('@'));
+            }
+        }
+
         if (email == null || alias == null) {
             throw new DavMailAuthenticationException("EXCEPTION_EWS_NOT_AVAILABLE");
         }
@@ -122,6 +148,8 @@ public class EwsExchangeSession extends ExchangeSession {
         // check EWS access
         try {
             checkEndPointUrl("/ews/exchange.asmx");
+        } catch (DavMailAuthenticationException e) {
+            throw e;
         } catch (IOException e) {
             try {
                 // failover, try to retrieve EWS url from autodiscover