Combining multiple API requests into a single batch request

[meinemitternacht]

Hello!

I'm working on porting a very large API project written in PHP to Rust, and I'm trying to find a replacement for our in-house request grouping that worked out well in PHP. Basically, the client (GUI) will collect the endpoints it needs for the current view into a single array of requests and POST this as a JSON object with a special header (x-batch-request, for example). The API would then take this request, split it into the individual requests, route them to their controllers, and combine all of the responses into a single JSON object.

Yes, I know this sounds similar to GraphQL, but due to a lot of external factors I have not put a lot of consideration into adopting that for our use case.

Is there a way to do this with Actix, apart from just having the API reverse-proxy itself?

Request:

{
  "requests": [
    {
      "method": "GET",
      "endpoint": "/example/1",
      "parameters": {}
    },
    {
      "method": "POST",
      "endpoint": "/example/2",
      "parameters": {
        "test": [
          "param1",
          "param2"
        ]
      }
    }
  ]
}

Response:

{
  "data": [
    {
      "endpoint": "/example/1",
      "method": "GET",
      "status": 404,
      "error": "...."
    },
    {
      "endpoint": "/example/2",
      "method": "POST",
      "status": 200,
      "data": {
        "foo": "bar"
      }
    }
  ]
}