使用Python在gRPC中进行分块

Question

任何人都可以共享任何Python服务器和客户端代码，这些代码演示了类似于https://jbrandhorst.com/post/grpc-binary-blob-stream/的gRPC中分块的使用吗？谢谢。

Answer 1

这是Chunker的gRPC Python版本。使用Python生成器实现服务程序中分块的主要逻辑。

# server.py
_CHUNKER_SIZE = 4
_DATA_TO_SEND = 'Hello gRPC Python World!'

def _chunk_bytes(data, chunker_size):
    index = 0
    while index < len(data):
        yield chunker_pb2.Chunk(
            chunk=data[index:index+chunker_size]
        )
        index += chunker_size


class Chunker(chunker_pb2_grpc.ChunkerServicer):

    @staticmethod
    def Chunker(request, unused_context):
        return _chunk_bytes(
            _DATA_TO_SEND,
            _CHUNKER_SIZE)

客户端很简单。它接收响应并将其连接起来。

with grpc.insecure_channel('localhost:50051') as channel:
    stub = chunker_pb2_grpc.ChunkerStub(channel)
    response_iterator = stub.Chunker(empty_pb2.Empty())
    received_bytes = bytes()
    for response in response_iterator:
        received_bytes += response.chunk
print('Concatenated Response:')
print(received_bytes)

Gist中提供了完整版本：https://gist.github.com/lidizheng/825f1b255767a90fb3a5d4be54071678