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grpc/examples/python/interceptors/streaming/README.md

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gRPC Python Client/Server Streaming Interceptor Example

This example demonstrates the usage of streaming client/server interceptors.

How to run this example

  1. Start server: python3 greeter_server.py
  2. Start client: python3 greeter_client.py

Expected outcome

unary_stream

server

INFO:root:interceptor1: before RPC
INFO:root:interceptor2: before RPC
INFO:root:interceptor3: before RPC
INFO:root:SayHelloServerStreaming: received request 0   # ---------------
INFO:root:interceptor3: before response 0 returned      # |
INFO:root:interceptor2: before response 0 returned      # |
INFO:root:interceptor1: before response 0 returned      # | 1st response
INFO:root:interceptor1: after response 0 returned       # |
INFO:root:interceptor2: after response 0 returned       # |
INFO:root:interceptor3: after response 0 returned       # ---------------
INFO:root:SayHelloServerStreaming: received request 1   # ---------------
INFO:root:interceptor3: before response 1 returned      # |
INFO:root:interceptor2: before response 1 returned      # |
INFO:root:interceptor1: before response 1 returned      # | 2nd response
INFO:root:interceptor1: after response 1 returned       # |
INFO:root:interceptor2: after response 1 returned       # |
INFO:root:interceptor3: after response 1 returned       # ---------------
INFO:root:interceptor3: after RPC
INFO:root:interceptor2: after RPC
INFO:root:interceptor1: after RPC

client

INFO:root:interceptor1: before RPC
INFO:root:interceptor2: before RPC
INFO:root:interceptor3: before RPC
INFO:root:interceptor3: before response 0 returned      # ---------------
INFO:root:interceptor2: before response 0 returned      # |
INFO:root:interceptor1: before response 0 returned      # |
INFO:root:Hello number 0, Alice!                        # | 1st response
INFO:root:interceptor1: after response 0 returned       # |
INFO:root:interceptor2: after response 0 returned       # |
INFO:root:interceptor3: after response 0 returned       # ---------------
INFO:root:interceptor3: before response 1 returned      # ---------------
INFO:root:interceptor2: before response 1 returned      # |
INFO:root:interceptor1: before response 1 returned      # |
INFO:root:Hello number 1, Alice!                        # | 2nd response
INFO:root:interceptor1: after response 1 returned       # |
INFO:root:interceptor2: after response 1 returned       # |
INFO:root:interceptor3: after response 1 returned       # ---------------
INFO:root:interceptor3: after RPC
INFO:root:interceptor2: after RPC
INFO:root:interceptor1: after RPC