The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
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// An integration test service that covers all the method signature permutations
// of unary/streaming requests/responses.
syntax = "proto2";
package grpc.testing;
enum PayloadType {
// Compressable text format.
COMPRESSABLE= 1;
// Uncompressable binary format.
UNCOMPRESSABLE = 2;
// Randomly chosen from all other formats defined in this enum.
RANDOM = 3;
}
message StatsRequest {
// run number
optional int32 test_num = 1;
}
message ServerStats {
// wall clock time for timestamp
required double time_now = 1;
// user time used by the server process and threads
required double time_user = 2;
// server time used by the server process and all threads
required double time_system = 3;
// RPC count so far
optional int32 num_rpcs = 4;
}
message Payload {
// The type of data in body.
optional PayloadType type = 1;
// Primary contents of payload.
optional bytes body = 2;
}
message Latencies {
required double l_50 = 1;
required double l_90 = 2;
required double l_99 = 3;
required double l_999 = 4;
}
message StartArgs {
required string server_host = 1;
required int32 server_port = 2;
optional bool enable_ssl = 3 [default = false];
optional int32 client_threads = 4 [default = 1];
optional int32 client_channels = 5 [default = -1];
optional int32 num_rpcs = 6 [default = 1];
optional int32 payload_size = 7 [default = 1];
}
message StartResult {
required Latencies latencies = 1;
required int32 num_rpcs = 2;
required double time_elapsed = 3;
required double time_user = 4;
required double time_system = 5;
}
message SimpleRequest {
// Desired payload type in the response from the server.
// If response_type is RANDOM, server randomly chooses one from other formats.
optional PayloadType response_type = 1 [default=COMPRESSABLE];
// Desired payload size in the response from the server.
// If response_type is COMPRESSABLE, this denotes the size before compression.
optional int32 response_size = 2;
// Optional input payload sent along with the request.
optional Payload payload = 3;
}
message SimpleResponse {
optional Payload payload = 1;
}
message StreamingInputCallRequest {
// Optional input payload sent along with the request.
optional Payload payload = 1;
// Not expecting any payload from the response.
}
message StreamingInputCallResponse {
// Aggregated size of payloads received from the client.
optional int32 aggregated_payload_size = 1;
}
message ResponseParameters {
// Desired payload sizes in responses from the server.
// If response_type is COMPRESSABLE, this denotes the size before compression.
required int32 size = 1;
// Desired interval between consecutive responses in the response stream in
// microseconds.
required int32 interval_us = 2;
}
message StreamingOutputCallRequest {
// Desired payload type in the response from the server.
// If response_type is RANDOM, the payload from each response in the stream
// might be of different types. This is to simulate a mixed type of payload
// stream.
optional PayloadType response_type = 1 [default=COMPRESSABLE];
repeated ResponseParameters response_parameters = 2;
// Optional input payload sent along with the request.
optional Payload payload = 3;
}
message StreamingOutputCallResponse {
optional Payload payload = 1;
}
service TestService {
// Start test with specified workload
rpc StartTest(StartArgs) returns (Latencies);
// Collect stats from server, ignore request content
rpc CollectServerStats(StatsRequest) returns (ServerStats);
// One request followed by one response.
// The server returns the client payload as-is.
rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
// One request followed by a sequence of responses (streamed download).
// The server returns the payload with client desired type and sizes.
rpc StreamingOutputCall(StreamingOutputCallRequest)
returns (stream StreamingOutputCallResponse);
// A sequence of requests followed by one response (streamed upload).
// The server returns the aggregated size of client payload as the result.
rpc StreamingInputCall(stream StreamingInputCallRequest)
returns (StreamingInputCallResponse);
// A sequence of requests with each request served by the server immediately.
// As one request could lead to multiple responses, this interface
// demonstrates the idea of full duplexing.
rpc FullDuplexCall(stream StreamingOutputCallRequest)
returns (stream StreamingOutputCallResponse);
// A sequence of requests followed by a sequence of responses.
// The server buffers all the client requests and then serves them in order. A
// stream of responses are returned to the client when the server starts with
// first request.
rpc HalfDuplexCall(stream StreamingOutputCallRequest)
returns (stream StreamingOutputCallResponse);
}