Validate that root paths are absolute and normalized.

pkg/analysis_server/lib/plugin/protocol/protocol.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Support for client code that needs to interact with the requests, responses
  * and notifications that are part of the analysis server's wire protocol.
  */
 library analysis_server.plugin.protocol.protocol;
 
@@ skipping 423 matching lines @@
    * Initialize a newly created instance to represent an error condition caused
    * by a [request] that specifies an execution context whose context root does
    * not exist.
    */
   Response.invalidExecutionContext(Request request, String contextId)
       : this(request.id,
             error: new RequestError(RequestErrorCode.INVALID_EXECUTION_CONTEXT,
                 "Invalid execution context: $contextId"));
 
   /**
+   * Initialize a newly created instance to represent the
+   * INVALID_FILE_PATH_FORMAT error condition.
+   */
+  Response.invalidFilePathFormat(Request request, path)
+      : this(request.id,
+            error: new RequestError(RequestErrorCode.INVALID_FILE_PATH_FORMAT,
+                'Invalid file path format: $path'));
+
+  /**
    * Initialize a newly created instance to represent an error condition caused
    * by a [request] that had invalid parameter.  [path] is the path to the
    * invalid parameter, in Javascript notation (e.g. "foo.bar" means that the
    * parameter "foo" contained a key "bar" whose value was the wrong type).
    * [expectation] is a description of the type of data that was expected.
    */
   Response.invalidParameter(Request request, String path, String expectation)
       : this(request.id,
             error: new RequestError(RequestErrorCode.INVALID_PARAMETER,
                 "Invalid parameter '$path'. $expectation."));
@@ skipping 112 matching lines @@
     jsonObject[ID] = id;
     if (error != null) {
       jsonObject[ERROR] = error.toJson();
     }
     if (_result != null) {
       jsonObject[RESULT] = _result;
     }
     return jsonObject;
   }
 }