如何将主体添加到Swift中使用Combine发出的HTTP GET请求中？

我正在使用Combine发出HTTP GET请求，但我不知道如何添加正文。我知道在GET请求中有一个主体是不好的，但是我真的需要测试一些东西。我使用的是Xcode 11.4和iOS 13.4。堆栈溢出不允许我发布这个问题，除非我写更多的信息，但我想不出你可能需要更多的信息。这是我的密码：

import Foundation
import Combine
//MARK: - Object to retrieve from JSON
struct Doctor: Codable, Identifiable {
    let id = UUID()
    let patients: [Patients]
}
struct Patients: Codable, Identifiable {
    let id: String
    let name: String
    let phone: String
    enum CodingKeys: String, CodingKey {
        case id = "_id"
        case name
        case phone
    }
}
class Network {
  enum Error: LocalizedError {
    case invalidResponse
    case addressUnreachable(URL)
    var errorDescription: String? {
      switch self {
      case .invalidResponse:
        return "The server responded with garbage."
      case .addressUnreachable(let url):
        return "\(url.absoluteString) is unreachable."
      }
    }
  }
  let urlRequest = URL(string: URL)!
  let networkQueue = DispatchQueue(label: "Networking",
                                   qos: .default,
                                   attributes: .concurrent)
  func downloadPatients() -> AnyPublisher<Doctor, Error> {
    URLSession.shared
      .dataTaskPublisher(for: urlRequest)
      .receive(on: networkQueue)
      .map(\.data)
      .decode(type: Doctor.self, decoder: JSONDecoder())
      .mapError { (error) -> Network.Error in
        switch error {
        case is URLError:
          return Error.addressUnreachable(self.urlRequest)
        default:
          return Error.invalidResponse
        }
    }
    .eraseToAnyPublisher()
  }
}
let networkRequest = Network()
 func loadPatients() {
       cancelable = networkRequest.downloadPatients()
            .sink(
                receiveCompletion: {
                receiveValue: { doctor in
                    self.localPatients = doctor.patients
                    self.isShowing = false
            }
        )
    }

---

谢谢大家!

我不确定是否可以使用dataTaskPublish来获取。但您可以通过此类呼叫自定义您的请求：

var request = URLRequest(url: url)
request.httpMethod = "GET"
request.httpBody = body
request.setValue("application/json", forHTTPHeaderField: "Content-Type")

URLSession.shared.dataTask(with: request) { (data, response, error) in
    if let error = error {
        // Handle the error here
    }
    guard let data = data else { return }

    let resData = try! JSONDecoder().decode(ServerMessage.self, from: data)
}.resume()

---

}

如果是POST呢？请将方法从GET更改为POST请求。httpMethod=POSTURLSession现在在尝试使用正文数据发出GET请求时会产生错误，因此不可能。此外，未来的HTTP标准也将强制执行此要求。