1 
    struct MyTest: Content {
        let hello: String
    }
    // http://127.0.0.1:8080/test-send
    app.get("test-send") { req -> EventLoopFuture<Response> in
        let info = MyTest.init(hello: "World")
        let infoData = try! JSONEncoder().encode(info)
        let infoString = String(data: infoData, encoding: .utf8)
        let inputJsonDic = ["hello": "world"]
        return req.client.post("http://127.0.0.1:8080/test-receive") { clientReq in
            // Value of type 'Dictionary<String, Any>' required for key ''. [request-id: 8236FDDD-B57C-4F86-8114-282A762E0B41]
            try clientReq.content.encode(infoString, as: .json)
            // can work
//            try clientReq.content.encode(inputJsonDic)
        }
        .flatMap { json in
            return json.encodeResponse(for: req)
        }
    }
    app.post("test-receive") { req -> MyTest in
        let info = try req.content.decode(MyTest.self)
        return info
    }
2

Make MyTest conform to Content then do

return req.client.post("http://127.0.0.1:8080/test-receive") { clientReq in
    try clientReq.content.encode(info)
}
3

I receive data from other services and am not sure about model properties.

4

How to solve this? After configuring .json, the Decode model cannot be correct. Is there any special treatment?

5

If you want to set the data directly you can set it on the request ByteBuffer body using one of NIO's convenience functions, or directly

6

This works, but I don’t know if their results are consistent.

        return req.client.post("\(AppConfig.environment.backend_callbackUrl)") { clientReq in
//            // Encode query string to the request URL.
//            try clientReq.query.encode(["q": "test"])
//
            // Encode JSON to the request body.
//            try clientReq.content.encode(["hello": "world"])
            clientReq.headers.contentType = .json
            clientReq.body = .init(string: jsonString)
//
//            // Add auth header to the request
//            let auth = BasicAuthorization(username: "something", password: "somethingelse")
//            clientReq.headers.basicAuthorization = auth
        }
//        .flatMapThrowing { clientRes in
//            try clientRes.content.decode(MyJSONResponse.self)
//        }
        .flatMap { json in
            return json.encodeResponse(for: req)
        }
7

What do you mean you don't know if it's consistent?

8 
try clientReq.content.encode(["hello": "world"])

vs

clientReq.headers.contentType = .json
clientReq.body = .init(string: #"{"hello": "world"}"#)

Are they the same?

9

Honestly I'm not 100% sure - just try it and see