Question

我正在尝试在this example之后创建一个gRPC python服务器-客户端应用程序，但是我无法将服务器置于处于侦听状态的代码中。在添加与示例几乎完全相同的代码并运行start方法之后，仍然没有任何东西在指定的端口上侦听。我的代码是：

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import grpc
import interface_pb2
import interface_pb2_grpc
from concurrent import futures
import time
# some other imports...

class GrpcInterface(interface_pb2_grpc.ManipulaMapaServicer):
    def CriaItem(self, request, context):
        # do stuff...

    def LeItem(self, request, context):
        # do stuff...

    def AtualizaItem(self, request, context):
        # do stuff...

    def DeletaItem(self, request, context):
        # do stuff...

_ONE_DAY_IN_SECONDS = 60 * 60 * 24

def main():
    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
    interface_pb2_grpc.add_ManipulaMapaServicer_to_server(GrpcInterface(), server)
    print('Vai iniciar o servidor gRPC na porta ' + str(8888))
    server.add_insecure_port('[::]:' + str(8888))
    server.start()
    try:
        while True:
            time.sleep(_ONE_DAY_IN_SECONDS)
    except KeyboardInterrupt:
        server.stop(0)

if __name__ == '__main__':
    try:
        main()
    except Exception as e:
        print('Erro ao rodar servidor: ')
        print(str(e))

interface_pb2_grpc.ManipulaMapaServicer的代码当然是根据我的python3 -m grpc_tools.protoc -I . --python_out=. --grpc_python_out=. interface.proto自动生成的（使用命令interface.proto）

syntax = "proto3";

message msgItem {
    int64 chave = 1;
    string valor = 2;
}

message status {
    string resposta = 1; 
    msgItem itemResposta = 2; 
}

service ManipulaMapa {
    rpc CriaItem (msgItem) returns (status) {}
    rpc LeItem (msgItem) returns (msgItem) {}
    rpc AtualizaItem (msgItem) returns (status) {}
    rpc DeletaItem (msgItem) returns (status) {}
}

执行到达while True:内部的main循环，但没有服务器在端口8888上运行。这里有什么问题？顺便说一句，这个问题与this并没有重复，因为在最后一个问题中，问题是由在start方法之后运行的垃圾收集器引起的。

Answer 1

您可以在调用main（）之前尝试启用日志记录。如果在server.start（）调用期间发生任何错误，它将写入错误日志。

也就是说，将其添加到main（）之前。

logging.basicConfig()

例如，如果端口已经被其他进程监听。

E0830 19:35:33.731000000 55600 src/core/ext/transport/chttp2/server/insecure/server_chttp2.cc:40] {"created":"@1567164933.731000000","description":"No address added out of total 1 resolved","file":"src/core/ext/transport/chttp2/server/chttp2_server.cc","file_line":394,"referenced_errors":[{"created":"@1567164933.731000000","description":"Failed to add port to server","file":"src/core/lib/iomgr/tcp_server_windows.cc","file_line":510,"referenced_errors":[{"created":"@1567164933.731000000","description":"OS Error","file":"src/core/lib/iomgr/tcp_server_windows.cc","file_line":201,"os_error":"Only one usage of each socket address (protocol/network address/port) is normally permitted.\r\n","syscall":"bind","wsa_error":10048}]}]}

Python gRPC服务器未在指定的端口上监听

1 个答案: