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mojo/shell/application_manager/data_pipe_peek.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_APPLICATION_MANAGER_DATA_PIPE_SEEK_H_
+#define SHELL_APPLICATION_MANAGER_DATA_PIPE_SEEK_H_
+
+#include <string>
+
+#include "mojo/public/cpp/system/core.h"
+
+namespace mojo {
+namespace shell {
+
+// The Peek functions are only intended to be used by the
+// DyanmicApplicationLoader class for discovering the type of a
+// URL response. They are a stopgap to be replaced by real support
+// in the DataPipe classes.
+
+// Return true and the first newline terminated line from source. Return false
+// if more than max_line_length bytes are scanned without seeing a newline, or
+// if the timeout is exceeded.
+bool BlockingPeekLine(DataPipeConsumerHandle source,
+                      std::string* line,
+                      size_t max_line_length,
+                      MojoDeadline timeout);
+
+// Return true and the first bytes_length bytes from source. Return false
+// if the timeout is exceeded.
+bool BlockingPeekNBytes(DataPipeConsumerHandle source,
+                        std::string* bytes,
+                        size_t bytes_length,
+                        MojoDeadline timeout);
+
+}  // namespace shell
+}  // namespace mojo
+
+#endif  // SHELL_APPLICATION_MANAGER_DATA_PIPE_SEEK_H_