Question

我用Python和ReactJS（ES6）上的客户端编写了一个测试gRPC服务器。这是简单的python gRPC服务器，它为客户端提供身份验证方法。还配置了EnvoyProxy以将HTTP请求传输到HTTP2。当我从客户端调用gRPC方法时，我得到{"code": 12, "message": "Method not found"}。

在status codes docs中，此错误描述为未实现的方法：

grpc status code docs

但我确定该方法已实现！

这是我的一些Python服务代码：

class AuthenticationServicer(glyphs_pb2_grpc.AuthenticationServicer):

    def SignIn(self, request, context):

        # do authentication method stuff...

        return glyphs_pb2.TokenResponse(
            success=True,
            response=glyphs_pb2.Token(token=refresh_token.token, expired_at=str(refresh_token.expired_at)),
        )

server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))

glyphs_pb2_grpc.add_AuthenticationServicer_to_server(AuthenticationServicer(), server)

print('Starting server. Listening on port 50051.')

server.add_insecure_port('localhost:50051')
server.start()

我尝试从python客户端调用gRPC方法，它按预期工作：

# client.py
channel = grpc.insecure_channel('localhost:50051')
stub = glyphs_pb2_grpc.AuthenticationStub(channel)

sign_in_form = glyphs_pb2.SignInForm(email="admin@localhost", password="123456a")
sign_in_response = stub.SignIn(sign_in_form)

print("Refresh Token: ")
print(sign_in_response)

~$ python ./client.py
Refresh Token: 
success: true
response {
  token: "7ae52622cf556632de0a0fe115e1fc0c5adaea9c"
  expired_at: "2019-11-13 13:22:56.870937"
}

我的特使YAML配置：

admin:
  access_log_path: /tmp/admin_access.log
  address:
    socket_address: { address: 0.0.0.0, port_value: 9901 }

static_resources:
  listeners:
  - name: listener_0
    address:
      socket_address: { address: 0.0.0.0, port_value: 9090 }
    filter_chains:
    - filters:
      - name: envoy.http_connection_manager
        config:
          codec_type: auto
          stat_prefix: ingress_http
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains: ["*"]
              routes:
              - match: { prefix: "/" }
                route:
                  cluster: authentication_service
                  max_grpc_timeout: 0s
              cors:
                allow_origin:
                - "*"
                allow_methods: GET, PUT, DELETE, POST, OPTIONS
                allow_headers: keep-alive,user-agent,cache-control,content-type,content-transfer-encoding,x-accept-content-transfer-encoding,x-accept-response-streaming,x-user-agent,x-grpc-web,grpc-timeout
                max_age: "1728000"
                expose_headers: grpc-status,grpc-message
          http_filters:
          - name: envoy.grpc_web
          - name: envoy.cors
          - name: envoy.router
  clusters:
  - name: authentication_service
    connect_timeout: 0.25s
    type: logical_dns
    http2_protocol_options: {}
    lb_policy: round_robin
    hosts: [{ socket_address: { address: host.docker.internal, port_value: 50051 }}]

ReactJS客户端代码：

const { AuthenticationClient } = require('./glyphs_grpc_web_pb');
const { SignInForm } = require('./glyphs_pb');


let client = new AuthenticationClient('http://localhost:9090/', null, null);

let form = new SignInForm();
form.setEmail('admin@localhost');
form.setPassword('123456a');

client.signIn(form, {}, (err, res) => {
    if (res) {
        console.log(res);
    } else {
        console.log(err);
    }
});

我希望输出是我的令牌响应，但实际输出是：

grpc-web client response

Package.json：

{
  "name": "glyphs"
  "dependencies": {
    "google-protobuf": "^3.10.0",
    "grpc-web": "^1.0.6",
    "react": "^16.10.2",
    "react-dom": "^16.10.2",
    "react-scripts": "3.2.0"
  }
}

Answer 1

我遇到了类似的method not found错误，此错误已通过将客户端创建更改为

来解决

let client = new AuthenticationClient（'http://localhost:9090'，null，null）;

请注意：最后删除/。

这样，呼叫client.signIn(...)将被定向到

http://127.0.0.1:9090/[package-if-defined-in-proto].AuthenticationServicer/SignIn

但是如果

let client = new AuthenticationClient（'http://localhost:9090/'，null，null）;

然后将相同的呼叫client.signIn(...)定向到

http://127.0.0.1:9090//[package-if-defined-in-proto].AuthenticationServicer/SignIn

双//导致方法未找到问题。我想grpc-web会自动并强制将/添加到主机名。

gRPC Web服务器返回“找不到方法”

1 个答案: