Here's a simpler server.js that doesn't require a client.js or deals with
any of the grpc stuff really.
const path = require('path')
const grpc = require('grpc')
const PROTO_PATH = path.resolve(__dirname, './user.proto')
const HOSTPORT = '0.0.0.0:50051'
const UserProto = grpc.load(PROTO_PATH);
const User = UserProto.User
const data = {
"[email protected]": {
"email": "[email protected]",
"firstName": "Bob",
"lastName": "Smith",
"metadata": {
"foo": "bar",
"active": true
}
},
"[email protected]": {
"email": "[email protected]",
"firstName": "Jane",
"lastName": "Smith"
}
}
function main() {
const u = new User(data['[email protected]'])
console.log(u)
}
main()
change the email to '[email protected]' and it would crash.
On Wednesday, 16 November 2016 14:38:55 UTC-4, Bojan D wrote:
>
> Sure sorry...
>
> I am working with node.js and trying to use grpc. Reproducible steps:
>
> Install node 6.9.1
>
> mkdir grpctest
> cd grpctest
> npm install grpc
>
> user.proto:
>
> import "google/protobuf/struct.proto";
>
> syntax = "proto3";
>
> package user;
>
> message User {
> string email = 1;
> string firstName = 2;
> string lastName = 3;
> google.protobuf.Value metadata = 4;
> }
>
> message GetUserRequest {
> string email = 1;
> }
>
> service UserService {
> rpc GetUser(GetUserRequest) returns (User);
> }
>
> server.js:
>
> const path = require('path')
> const grpc = require('grpc')
>
> const PROTO_PATH = path.resolve(__dirname, './user.proto')
> const HOSTPORT = '0.0.0.0:50051'
>
> const UserService = grpc.load(PROTO_PATH).user.UserService
>
> const data = {
> "[email protected]": {
> "email": "[email protected]",
> "firstName": "Bob",
> "lastName": "Smith",
> "metadata": {
> "foo": "bar",
> "active": true
> }
> },
> "[email protected]": {
> "email": "[email protected]",
> "firstName": "Jane",
> "lastName": "Smith"
> }
> }
>
> function getUser(call, callback) {
> const user = data[call.request.email]
> if (!user) {
> return callback(new Error('User Not Found'))
> }
> return callback(null, user)
> }
>
> function main() {
> const server = new grpc.Server()
> server.addProtoService(UserService.service, { getUser })
> server.bind(HOSTPORT, grpc.ServerCredentials.createInsecure())
> server.start()
> console.log(`User service running @ ${HOSTPORT}`)
> }
>
> main()
>
> client.js
>
> const path = require('path')
> const grpc = require('grpc')
>
> const PROTO_PATH = path.resolve(__dirname, './user.proto')
> const HOSTPORT = '0.0.0.0:50051'
>
> const UserService = grpc.load(PROTO_PATH).user.UserService
> const client = new UserService(HOSTPORT, grpc.credentials.createInsecure())
>
> client.getUser({ email: '[email protected]' }, (err, user) => {
> console.log(user)
> process.exit()
> })
>
>
> Run the server using command:
>
> node server.js
> User service running @ 0.0.0.0:50051
>
> Run the client:
>
> node client.js
> { email: '[email protected]',
> firstName: 'Jane',
> lastName: 'Smith',
> metadata: null }
>
> change the email in client request to '[email protected]'
>
>
> /Users/bojand/dev/nodejs/grpctest/node_modules/protobufjs/dist/protobuf.js:2472
> throw Error(this+"#"+keyOrObj+" is not a
> field: undefined");
> ^
>
> Error: .google.protobuf.Value#foo is not a field: undefined
> at Error (native)
> ...
>
> Within the server part once we load proto we do have a constructor for the
> User class, and I've tried playing around with trying to create an instance
> of that in different ways and it crashes when trying to create that
> instance. I've also tried to encode from stringified JSON and still fails.
> When there is "metadata" it crashes. I think I am doing something dumb but
> I am not sure what.
>
> Thanks.
>
> On Wednesday, 16 November 2016 13:58:44 UTC-4, Tim Kientzle wrote:
>>
>> I think we need more details:
>>
>> Are you using C++ or Java or Python or Ruby or C# or some other
>> language?
>>
>> What version of protoc?
>>
>> Can you show the code you’re using to create the message?
>>
>> Tim
>>
>>
>> On Nov 16, 2016, at 5:02 AM, Bojan D <[email protected]> wrote:
>>
>> Thanks for the answer. Somehow I missed the Protocol Buffers Well-Known
>> Types page in the docs / protobuf website.
>>
>> I still have issue creating an instance of the message. For example if I
>> have a plain object:
>>
>> {
>> firstName: 'Bob'
>> lastName: 'Smith',
>> email: '[email protected]',
>> metadata: {
>> foo: 'bar',
>> active: true
>> }
>> }
>>
>> And I try to create an instance of the message (to be sent via grpc) I
>> get error
>>
>> .google.protobuf.Struct#foo is not a field: undefined
>>
>> Same thing if I use google.protobuf.Value. I've tried numerous ways of
>> doing this but can't seem to accomplish it. I must be missing something.
>> Anyone have any ideas.
>>
>> Thanks for the help again.
>>
>> Bojan
>>
>> On Tuesday, 15 November 2016 15:57:20 UTC-4, Tim Kientzle wrote:
>>>
>>>
>>> On Nov 15, 2016, at 9:15 AM, Bojan D <[email protected]> wrote:
>>>
>>> Newbie question... If I have the following sample "User" JSON data:
>>>
>>> {
>>> firstName: 'Bob'
>>> lastName: 'Smith',
>>> email: '[email protected]',
>>> metadata: {
>>> // a plain JS object that
>>> // - will always exist and be at least an empty {} object
>>> // - could potentially contain any number of properties and values,
>>> depending on specific "user"
>>> }
>>> }
>>>
>>> How do I represent the metadata property within proto definition?
>>>
>>>
>>>
>>> You want to use the well-known types “Struct” or “Value”, which are
>>> specifically designed to support ad hoc JSON parsing. “Struct” supports
>>> parsing any valid JSON object structure, “Value” can parse any valid JSON:
>>>
>>> message User {
>>> string email = 1;
>>> string firstName = 2;
>>> string lastName = 3;
>>> google.protobuf.Struct metadata = 4;
>>> }
>>>
>>>
>>> Tim
>>>
>>>
>> --
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>>
>>
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