Sending struct via GRPC request

[v1lev]

Is there an existing issue for this?

• [X] I have searched the tracker for existing similar issues

Describe the Issue

Hi! I can't figure out how to properly send google.protobuf.Struct. Whenever I add a Struct field to the message it is received just as an empty field on the server.

Server = Python application with gRPC AsyncIO API Client = Postman

Sample message definition:

syntax = "proto3";
import "google/protobuf/struct.proto";

message Message {
  google.protobuf.Struct data = 1;
  google.protobuf.Struct another_data = 2;
}

Sample message that is sent via UI:

{
  "data": {
    "key": "value"
  }
  "another_data": {}
}

No matter of keys and values the data field is always empty at the server side.

Steps To Reproduce

1. Create GRPC api with a request containing google.protobuf.Struct field
2. Import it into Postman, create a request
3. Fill a Struct field with a JSON-like entity
4. At the server side the Struct field will be empty

Screenshots or Videos

No response

Environment Information

- Operating System: macOS Monterey 12.1
- Platform Type: Native App
- Postman Version: v9.14.13

Additional Context?

No response

[igor-sirotin]

I would like to add that the struct is also received wrong.

My proto message:

message MyMessage {
  google.protobuf.Struct data = 1;
}

I take this JSON:

{ 
  "myKey1": "myValue1",
  "myKey2": "myValue2"
}

And convert it in a C++ app with ::google::protobuf::util::JsonStringToMessage.

Having this done I expected to see in Postmane just the same JSON structure as I sent from the service. But what I get in postman is a "json of json":

{
    "key": "json",
    "value": {
        "struct_value": {
            "fields": [
                {
                    "key": "myKey1",
                    "value": {
                        "string_value": "myValue1"
                    }
                },
                {
                    "key": "myKey2",
                    "value": {
                        "string_value": "myValue2"
                    }
                }
            ]
        }
    }
}

[Chen-hao-Huang]

Similar bug happened to me too, the request worked with GrpcUI, but the server got an empty map when I copy pasted the same raw JSON to postman

[codenirvana]

@aawwsed10 Can you share the type definition and JSON value (without any sensitive information)?

[Chen-hao-Huang]

@aawwsed10 Can you share the type definition and JSON value (without any sensitive information)?

{
"object": {
...     
"attributes": {"test":"123"},
...
}
}

message Object{
...
    google.protobuf.Struct attributes = 12;                
...
}

and using postman the server would get map[] and with grpcui the server gets map[test:123]

[const-tmp]

Same issue Request:

{
    "data": {
        "action": "deposit"
    },
    "id": 8
}

Proto:

message UpdateTemplateRequest {
  int32 id = 1;
  google.protobuf.Struct data = 2;
}

Actual request data on server: id:8 data:{}

[rahulrayal]

Why you guys still didn't fixed it? It's a major bug

[glovenkevin]

It happen to me too, I was using postman with gRPC to send a struct-type property into golang applications. The apps didn't receive the payload completely, especially for the struct-type. Is there any progress on this issue?

[lanzay]

google.protobuf.Struct - do not work :(

More and more people are facing this problem. We like this product but we are forced to look for other alternatives - it's a pity.

Can you please tell us when you can start solving this problem?

[glovenkevin]

I don't know if any of you come to this post, but currently, I managed to use the gRPC struct value with some syntax provided. Probably this issue has been solved.

here is a simple sample of how I managed to send the struct value

...
"recipient": [
        "9a71327e-5ac6-46a8-8219-2e2cadeed303"
    ],
    "payload": {"fields": {
        "action_url": {
            "string_value": "https://xxxx.xxxx"
        },
        "request_number": {
            "string_value": "asdf"
        }
    }},
    "sender": "f7e442bc-14f7-4ee0-99c9-b317a190af45",
...

the struct value is set up to the object, and there is already a syntax for it. like

it is the same as the igor-sirotin mention before,

[o-shevchenko]

I faced that issue too. I've spent a lot of time debugging my code but it looks like there is an issue with Postman.

[xuanyuwang]

The issue is still existing at of 2023 Dec 27 with

Version 10.21.9
UI Version: 10.21.9-ui-231220-0601
Desktop Platform Version: 10.21.0 (10.21.0)

Spent hours to figure out what went wrong :(

[panoet]

I am facing this also, now

[anmol242]

We are also seeing the same problem. When we use the server reflection proto definition, everything works great. However, when we make a GRPC call while importing the proto file, it truncates the data in the fields it is sending to server. Also,server reflection expects 'google.protobuf.Struct' in the request in a different format, while importing the proto file expects the 'google.protobuf.Struct' in the request in a different format .

For eg: If I have message like this in the proto file:

syntax = "proto3";
import "google/protobuf/struct.proto";

message Message {
  google.protobuf.Struct data = 1;
  string user_id = 2;
}

For Server reflection postman is expecting this in request:

{
    "data": {
        "fields": [
            {
                "key": "email",
                "value": {
                    "string_value": "abc@mail.com"
                }
            },
            {
                "key": "address",
                "value": {
                    "string_value": "Delhi, India"
                }
            }
         ]
     },
     user_id: "test-id"
 }      

When I import the proto file on postman:

{
    "data": {
        "fields": {
            "email": {
               "string_value": "abc@mail.com"
               },
            "address": {
                 "stringValue":"Delhi, India"
                 }
            }
      },
    user_id: "test-id"
}

The server reflection request works fine but the one I am sending while importing proto file doesn't.

[PJEstrada]

Still experiencing this on July 15, 2024

[iurydias]

Same problem here...

[Sahil-Agarwal-DD]

I am still facing this issue!

[xsor-hbo]

Below is what worked for me. Using server reflection. Postman Version 11.11.1

{
    "my_struct_field": {
        "fields": {
            "my_field_name": {
                "string_value": "abc"
            }
        }
    }
}

[Sahil-Agarwal-DD]

When I use server reflection, I get this - (properties is the struct field) Postman Version 11.11.1

"properties": {
                    "fields": [
                        {
                            "key": "anim consequat culpa nisi aliquip",
                            "value": {}
                        },
                        {
                            "key": "nulla irure dolor laboris dolor",
                            "value": {}
                        },
                        {
                            "key": "do aliqua anim laboris cupidatat",
                            "value": {}
                        }
                    ]
                },

On using the format that @xsor-hbo provided, it worked fine for me. Thank you.