From 2490884fd74e20b69e5913533be77fc057731a47 Mon Sep 17 00:00:00 2001
From: Rafael Guterres <guterresrafael@gmail.com>
Date: Thu, 5 Nov 2015 22:03:00 -0200
Subject: Add support to authorization basic http header in alternative to
 cookie and java session. Modification to allow traccar api stateless.

---
 src/org/traccar/helper/Authorization.java | 45 +++++++++++++++++++++++++++++++
 src/org/traccar/web/BaseServlet.java      | 14 +++++++++-
 2 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 src/org/traccar/helper/Authorization.java

diff --git a/src/org/traccar/helper/Authorization.java b/src/org/traccar/helper/Authorization.java
new file mode 100644
index 000000000..992254d04
--- /dev/null
+++ b/src/org/traccar/helper/Authorization.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.helper;
+
+import java.util.Base64;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.StringTokenizer;
+
+public final class Authorization {
+    
+    private Authorization() {
+    }
+    
+    public static final String HEADER = "Authorization";
+    public static final String SCHEME = "Basic";
+    public static final String REGEX = SCHEME + " ";
+    public static final String REPLACEMENT = "";
+    public static final String TOKENIZER = ":";
+    public static final String USERNAME = "username";
+    public static final String PASSWORD = "password";
+
+    public static Map<String, String> parse(String authorization) {
+        Map<String, String> authMap = new HashMap<>();
+        final String encodedUsernameAndPassword = authorization.replaceFirst(REGEX, REPLACEMENT);
+        String usernameAndPassword = new String(Base64.getDecoder().decode(encodedUsernameAndPassword));
+        final StringTokenizer tokenizer = new StringTokenizer(usernameAndPassword, TOKENIZER);
+        authMap.put(USERNAME, tokenizer.nextToken());
+        authMap.put(PASSWORD, tokenizer.nextToken());
+        return authMap;
+    }
+}
diff --git a/src/org/traccar/web/BaseServlet.java b/src/org/traccar/web/BaseServlet.java
index cfdff40d3..a77ad0908 100644
--- a/src/org/traccar/web/BaseServlet.java
+++ b/src/org/traccar/web/BaseServlet.java
@@ -20,6 +20,7 @@ import org.traccar.helper.Log;
 import java.io.IOException;
 import java.io.Writer;
 import java.security.AccessControlException;
+import java.util.Map;
 import javax.json.Json;
 import javax.json.JsonObjectBuilder;
 import javax.json.JsonStructure;
@@ -27,6 +28,9 @@ import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import org.traccar.Context;
+import org.traccar.helper.Authorization;
+import org.traccar.model.User;
 
 public abstract class BaseServlet extends HttpServlet {
 
@@ -57,7 +61,15 @@ public abstract class BaseServlet extends HttpServlet {
     protected abstract boolean handle(
             String command, HttpServletRequest req, HttpServletResponse resp) throws Exception;
 
-    public long getUserId(HttpServletRequest req) {
+    public long getUserId(HttpServletRequest req) throws Exception  {
+        String authorization = req.getHeader(Authorization.HEADER);
+        if (authorization != null && !authorization.isEmpty()) {
+            Map<String, String> authMap = Authorization.parse(authorization);
+            User user = Context.getDataManager().login(authMap.get(Authorization.USERNAME), authMap.get(Authorization.PASSWORD));
+            if (user != null) {
+                return user.getId();
+            }
+        }
         Long userId = (Long) req.getSession().getAttribute(USER_KEY);
         if (userId == null) {
             throw new AccessControlException("User not logged in");
-- 
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