Add sessions to HttpServer.

runtime/bin/crypto.cc

+// Copyright (c) 2012, 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.
+
+#include "bin/crypto.h"
+#include "bin/dartutils.h"
+
+#include "include/dart_api.h"
+
+
+void FUNCTION_NAME(Crypto_GetRandomBytes)(Dart_NativeArguments args) {
+  Dart_EnterScope();
+  Dart_Handle count_obj = Dart_GetNativeArgument(args, 0);
+  int64_t count = 0;
+  if (!DartUtils::GetInt64Value(count_obj, &count)) {
+    Dart_Handle error = Dart_NewString("Invalid argument, must be an int.");
+    Dart_ThrowException(error);
+  }
+  uint8_t* buffer = new uint8_t[count];

[Søren Gjesse, 2012/10/22 11:13:02]

Shouldn't we check for NULL here?

[Anders Johnsen, 2012/10/22 12:18:57]

Done.

+  if (!Crypto::GetRandomBytes(count, buffer)) {
+    delete[] buffer;
+    Dart_Handle error = Dart_NewString("Failed to get random bytes.");

[Søren Gjesse, 2012/10/22 11:13:02]

Maybe this should be an OSError is errno/GetLastError can provide additional
information.

[Anders Johnsen, 2012/10/22 12:18:57]

Done.

+    Dart_ThrowException(error);
+  }
+  Dart_Handle result = Dart_NewByteArray(count);
+  if (Dart_IsError(result)) {
+    delete[] buffer;
+    Dart_Handle error = Dart_NewString("Failed to allocate storage.");
+    Dart_ThrowException(error);
+  }
+  Dart_ListSetAsBytes(result, 0, buffer, count);
+  Dart_SetReturnValue(args, result);
+  delete[] buffer;
+  Dart_ExitScope();
+}
+