迁移 Alamofire 4 到 5 构建问题

Question

I am doing migration after 2 years a lots things have been changed, now flagging a lots of error while building. Most are related to Alamofire 5. Now there are many error keeps coming fixing one by one.

Error: // ERROR: Cannot specialize non-generic type

 public static func ObjMappingSerializer<T: Mappable>(_ keyPath: String?) -> DataResponseSerializer<T> { 'DataResponseSerializer'
        return DataResponseSerializer { request, response, data, error in
            //LogResponse(response, data: data, error: error)
            Logger._reqresLogger.logResponse(response, data: data, error: error)
            guard error == nil else {
                return .failure(parseErrorResponse(data: data, response: response, errorType: error!))
            }
            
            guard let _ = data else {
                return .failure(errorForNilData())
            }
            
            let JSONToMap = deserializeJSON(request: request, response: response, data: data, error: error, keyPath: keyPath)
            if let json = JSONToMap as? [String:Any], let parsedObject = Mapper<T>().map(JSON:json) {
                return .success(parsedObject)
            }
            
            let errorCode = response?.statusCode ?? NSURLErrorCannotParseResponse
            return .failure(APIError(code: errorCode, errorUserInfo: nil))
        }
    }

Fixed by autosuggestion however next error comes

Error: Trailing closure passed to parameter of type 'DataPreprocessor' that does not accept a closure

public static func ObjMappingSerializer(_ keyPath: String?) -> DataResponseSerializer {
            return DataResponseSerializer { request, response, data, error in
                //LogResponse(response, data: data, error: error)
                Logger._reqresLogger.logResponse(response, data: data, error: error)
                guard error == nil else {
                    return .failure(parseErrorResponse(data: data, response: response, errorType: error!))
                }
                
                guard let _ = data else {
                    return .failure(errorForNilData())
                }
                
                let JSONToMap = deserializeJSON(request: request, response: response, data: data, error: error, keyPath: keyPath)
                if let json = JSONToMap as? [String:Any], let parsedObject = Mapper<T>().map(JSON:json) {
                    return .success(parsedObject)
                }
                
                let errorCode = response?.statusCode ?? NSURLErrorCannotParseResponse
                return .failure(APIError(code: errorCode, errorUserInfo: nil))
            }
        }

Now in Alamofire many methods have been removed in Alamofire 5. Now not able to fix these error. Help needed.

Answer 1

You can no longer initialize a DataResponseSerializer with a closure. I suggest you reevaluate your parsing needs and rebuild around responseDecodable . If you need, you can create your own serializer by adopting ResponseSerializer . Your logic would be the same, just copied into the parse method.