Initial checkin of gRPC to third_party/

third_party/grpc/test/cpp/interop/client_helper.cc

Index: third_party/grpc/test/cpp/interop/client_helper.cc
diff --git a/third_party/grpc/test/cpp/interop/client_helper.cc b/third_party/grpc/test/cpp/interop/client_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5caf0f2d1d0242bfaec238bce655292477bf4bdc
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+++ b/third_party/grpc/test/cpp/interop/client_helper.cc
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+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "test/cpp/interop/client_helper.h"
+
+#include <unistd.h>
+
+#include <fstream>
+#include <memory>
+#include <sstream>
+
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <gflags/gflags.h>
+#include <grpc++/channel.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/security/credentials.h>
+
+#include "src/cpp/client/secure_credentials.h"
+#include "test/core/security/oauth2_utils.h"
+#include "test/cpp/util/create_test_channel.h"
+
+DECLARE_bool(use_tls);
+DECLARE_bool(use_test_ca);
+DECLARE_int32(server_port);
+DECLARE_string(server_host);
+DECLARE_string(server_host_override);
+DECLARE_string(test_case);
+DECLARE_string(default_service_account);
+DECLARE_string(service_account_key_file);
+DECLARE_string(oauth_scope);
+
+namespace grpc {
+namespace testing {
+
+grpc::string GetServiceAccountJsonKey() {
+  static grpc::string json_key;
+  if (json_key.empty()) {
+    std::ifstream json_key_file(FLAGS_service_account_key_file);
+    std::stringstream key_stream;
+    key_stream << json_key_file.rdbuf();
+    json_key = key_stream.str();
+  }
+  return json_key;
+}
+
+grpc::string GetOauth2AccessToken() {
+  std::shared_ptr<CallCredentials> creds = GoogleComputeEngineCredentials();
+  SecureCallCredentials* secure_creds =
+      dynamic_cast<SecureCallCredentials*>(creds.get());
+  GPR_ASSERT(secure_creds != nullptr);
+  grpc_call_credentials* c_creds = secure_creds->GetRawCreds();
+  char* token = grpc_test_fetch_oauth2_token_with_credentials(c_creds);
+  GPR_ASSERT(token != nullptr);
+  gpr_log(GPR_INFO, "Get raw oauth2 access token: %s", token);
+  grpc::string access_token(token + sizeof("Bearer ") - 1);
+  gpr_free(token);
+  return access_token;
+}
+
+std::shared_ptr<Channel> CreateChannelForTestCase(
+    const grpc::string& test_case) {
+  GPR_ASSERT(FLAGS_server_port);
+  const int host_port_buf_size = 1024;
+  char host_port[host_port_buf_size];
+  snprintf(host_port, host_port_buf_size, "%s:%d", FLAGS_server_host.c_str(),
+           FLAGS_server_port);
+
+  if (test_case == "compute_engine_creds") {
+    std::shared_ptr<CallCredentials> creds;
+    GPR_ASSERT(FLAGS_use_tls);
+    creds = GoogleComputeEngineCredentials();
+    return CreateTestChannel(host_port, FLAGS_server_host_override,
+                             FLAGS_use_tls, !FLAGS_use_test_ca, creds);
+  } else if (test_case == "jwt_token_creds") {
+    std::shared_ptr<CallCredentials> creds;
+    GPR_ASSERT(FLAGS_use_tls);
+    grpc::string json_key = GetServiceAccountJsonKey();
+    std::chrono::seconds token_lifetime = std::chrono::hours(1);
+    creds =
+        ServiceAccountJWTAccessCredentials(json_key, token_lifetime.count());
+    return CreateTestChannel(host_port, FLAGS_server_host_override,
+                             FLAGS_use_tls, !FLAGS_use_test_ca, creds);
+  } else if (test_case == "oauth2_auth_token") {
+    grpc::string raw_token = GetOauth2AccessToken();
+    std::shared_ptr<CallCredentials> creds = AccessTokenCredentials(raw_token);
+    return CreateTestChannel(host_port, FLAGS_server_host_override,
+                             FLAGS_use_tls, !FLAGS_use_test_ca, creds);
+  } else {
+    return CreateTestChannel(host_port, FLAGS_server_host_override,
+                             FLAGS_use_tls, !FLAGS_use_test_ca);
+  }
+}
+
+}  // namespace testing
+}  // namespace grpc