Initial checkin of gRPC to third_party/

third_party/grpc/test/cpp/util/grpc_cli.cc

Index: third_party/grpc/test/cpp/util/grpc_cli.cc
diff --git a/third_party/grpc/test/cpp/util/grpc_cli.cc b/third_party/grpc/test/cpp/util/grpc_cli.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.
+ *
+ */
+
+/*
+  A command line tool to talk to any grpc server.
+  Example of talking to grpc interop server:
+  1. Prepare request binary file:
+    a. create a text file input.txt, containing the following:
+        response_size: 10
+        payload: {
+          body: "hello world"
+        }
+    b. under grpc/ run
+        protoc --proto_path=src/proto/grpc/testing/ \
+        --encode=grpc.testing.SimpleRequest
+  src/proto/grpc/testing/messages.proto \
+        < input.txt > input.bin
+  2. Start a server
+    make interop_server && bins/opt/interop_server --port=50051
+  3. Run the tool
+    make grpc_cli && bins/opt/grpc_cli call localhost:50051 \
+    /grpc.testing.TestService/UnaryCall --enable_ssl=false \
+    --input_binary_file=input.bin --output_binary_file=output.bin
+  4. Decode response
+    protoc --proto_path=src/proto/grpc/testing/ \
+    --decode=grpc.testing.SimpleResponse src/proto/grpc/testing/messages.proto \
+    < output.bin > output.txt
+  5. Now the text form of response should be in output.txt
+  Optionally, metadata can be passed to server via flag --metadata, e.g.
+    --metadata="MyHeaderKey1:Value1:MyHeaderKey2:Value2"
+*/
+
+#include <fstream>
+#include <iostream>
+#include <sstream>
+
+#include <gflags/gflags.h>
+#include <grpc/grpc.h>
+#include <grpc++/channel.h>
+#include <grpc++/create_channel.h>
+#include <grpc++/security/credentials.h>
+#include <grpc++/support/string_ref.h>
+
+#include "test/cpp/util/cli_call.h"
+#include "test/cpp/util/string_ref_helper.h"
+#include "test/cpp/util/test_config.h"
+
+DEFINE_bool(enable_ssl, true, "Whether to use ssl/tls.");
+DEFINE_bool(use_auth, false, "Whether to create default google credentials.");
+DEFINE_string(input_binary_file, "",
+              "Path to input file containing serialized request.");
+DEFINE_string(output_binary_file, "output.bin",
+              "Path to output file to write serialized response.");
+DEFINE_string(metadata, "",
+              "Metadata to send to server, in the form of key1:val1:key2:val2");
+
+void ParseMetadataFlag(
+    std::multimap<grpc::string, grpc::string>* client_metadata) {
+  if (FLAGS_metadata.empty()) {
+    return;
+  }
+  std::vector<grpc::string> fields;
+  const char* delim = ":";
+  size_t cur, next = -1;
+  do {
+    cur = next + 1;
+    next = FLAGS_metadata.find_first_of(delim, cur);
+    fields.push_back(FLAGS_metadata.substr(cur, next - cur));
+  } while (next != grpc::string::npos);
+  if (fields.size() % 2) {
+    std::cout << "Failed to parse metadata flag" << std::endl;
+    exit(1);
+  }
+  for (size_t i = 0; i < fields.size(); i += 2) {
+    client_metadata->insert(
+        std::pair<grpc::string, grpc::string>(fields[i], fields[i + 1]));
+  }
+}
+
+template <typename T>
+void PrintMetadata(const T& m, const grpc::string& message) {
+  if (m.empty()) {
+    return;
+  }
+  std::cout << message << std::endl;
+  grpc::string pair;
+  for (typename T::const_iterator iter = m.begin(); iter != m.end(); ++iter) {
+    pair.clear();
+    pair.append(iter->first.data(), iter->first.size());
+    pair.append(" : ");
+    pair.append(iter->second.data(), iter->second.size());
+    std::cout << pair << std::endl;
+  }
+}
+
+int main(int argc, char** argv) {
+  grpc::testing::InitTest(&argc, &argv, true);
+
+  if (argc < 4 || grpc::string(argv[1]) != "call") {
+    std::cout << "Usage: grpc_cli call server_host:port full_method_string\n"
+              << "Example: grpc_cli call service.googleapis.com "
+              << "/grpc.testing.TestService/UnaryCall "
+              << "--input_binary_file=input.bin --output_binary_file=output.bin"
+              << std::endl;
+  }
+  grpc::string server_address(argv[2]);
+  // TODO(yangg) basic check of method string
+  grpc::string method(argv[3]);
+
+  if (FLAGS_input_binary_file.empty()) {
+    std::cout << "Missing --input_binary_file for serialized request."
+              << std::endl;
+    return 1;
+  }
+  std::cout << "connecting to " << server_address << std::endl;
+
+  std::ifstream input_file(FLAGS_input_binary_file,
+                           std::ios::in | std::ios::binary);
+  std::stringstream input_stream;
+  input_stream << input_file.rdbuf();
+
+  std::shared_ptr<grpc::ChannelCredentials> creds;
+  if (!FLAGS_enable_ssl) {
+    creds = grpc::InsecureChannelCredentials();
+  } else {
+    if (FLAGS_use_auth) {
+      creds = grpc::GoogleDefaultCredentials();
+    } else {
+      creds = grpc::SslCredentials(grpc::SslCredentialsOptions());
+    }
+  }
+  std::shared_ptr<grpc::Channel> channel =
+      grpc::CreateChannel(server_address, creds);
+
+  grpc::string response;
+  std::multimap<grpc::string, grpc::string> client_metadata;
+  std::multimap<grpc::string_ref, grpc::string_ref> server_initial_metadata,
+      server_trailing_metadata;
+  ParseMetadataFlag(&client_metadata);
+  PrintMetadata(client_metadata, "Sending client initial metadata:");
+  grpc::Status s = grpc::testing::CliCall::Call(
+      channel, method, input_stream.str(), &response, client_metadata,
+      &server_initial_metadata, &server_trailing_metadata);
+  PrintMetadata(server_initial_metadata,
+                "Received initial metadata from server:");
+  PrintMetadata(server_trailing_metadata,
+                "Received trailing metadata from server:");
+  if (s.ok()) {
+    std::cout << "Rpc succeeded with OK status" << std::endl;
+    if (!response.empty()) {
+      std::ofstream output_file(FLAGS_output_binary_file,
+                                std::ios::trunc | std::ios::binary);
+      output_file << response;
+    }
+  } else {
+    std::cout << "Rpc failed with status code " << s.error_code()
+              << " error message " << s.error_message() << std::endl;
+  }
+
+  return 0;
+}