在 URLSession httpBody 中发送大括号

Question

我需要使用 URLSession 发出 POST 请求，并将下面的确切 JSON 作为 httpBody 发送。 我的问题是正确发送大括号和方括号。

{
  "confirm": true,
  "booking": [
    {
      "sendSms": false,
      "order": "8724897",
      "priority": 2,
      "phone": {
        "description": "Main phone",
        "number": "555444333"
      }
    }
  ]
}

下面是我正在使用的，它不起作用，因为它总是发送方括号而不是大括号。 我猜它发送的是数组而不是对象。

let phone = [String:Any]()
    phone["description"] = "Main phone" 
    phone["number"] = "555444333"

let booking = [String:Any]()  
    booking["sendSms"] = false
    booking["order"] = "8724897"
    booking["priority"] = 2
    booking["phone"] = phone

let json = [String:Any]()
    json["confirm"] = true
    json["booking"] = [booking]

这里是如何发送的

let bodyData = try JSONSerialization.data(withJSONObject: json, options: [])
request.httpBody = bodyData

你有什么建议？ 谢谢

Answer 1

您需要序列化json，例如JSONSerialization.data(withJSONObject:options):

例如

let phone: [String: Any] = [
    "description": "Main phone",
    "number": "555444333"
]

let booking: [String: Any] = [
    "sendSms": false,
    "order": "8724897",
    "priority": 2,
    "phone": phone
]

let json: [String: Any] = [
    "confirm": true,
    "booking": [booking]
]

do {     
    let data = try JSONSerialization.data(withJSONObject: json)
    ...
} catch {
    print(error)
}

---

或者你可以使用Codable类型然后使用JSONEncoder：

struct Phone: Codable {
    let description: String
    let number: String
}

struct Booking: Codable {
    let sendSms: Bool
    let order: String
    let priority: Int
    let phone: Phone
}

struct Bookings: Codable {
    let confirm: Bool
    let booking: [Booking]
}

let phone = Phone(description: "Main phone", number: "555444333")
let booking = Booking(sendSms: false, order: "8724897", priority: 2, phone: phone)
let bookings = Bookings(confirm: true, booking: [booking])

do {     
    let data = try JSONEncoder().encode(bookings)
    ...
} catch {
    print(error)
}

---

您说服务器期望 JSON 格式如下：

{
  "confirm": true,
  "booking": [
    {
      "sendSms": false,
      "order": "8724897",
      "priority": 2,
      "phone": {
        "description": "Main phone",
        "number": "555444333"
      }
    }
  ]
}

这就是上面将生成的。 booking 键是一个数组（带方括号），其中只有一项。

但您也建议服务器抱怨方括号。我想知道服务器是否真的期待一个简单的字典，例如

{
  "confirm": true,
  "booking": {
    "sendSms": false,
    "order": "8724897",
    "priority": 2,
    "phone": {
      "description": "Main phone",
      "number": "555444333"
    }
  }
}

如果booking 总是只有一个项目，这将是一种更习惯的格式。在这种情况下，代码将是：

let phone: [String: Any] = [
    "description": "Main phone",
    "number": "555444333"
]

let booking: [String: Any] = [
    "sendSms": false,
    "order": "8724897",
    "priority": 2,
    "phone": phone
]

let json: [String: Any] = [
    "confirm": true,
    "booking": booking   // note, not an array, but single item
]

do {     
    let data = try JSONSerialization.data(withJSONObject: json)
    ...
} catch {
    print(error)
}

或者

struct Phone: Codable {
    let description: String
    let number: String
}

struct Booking: Codable {
    let sendSms: Bool
    let order: String
    let priority: Int
    let phone: Phone
}

struct Confirmation: Codable {
    let confirm: Bool
    let booking: Booking
}

let phone = Phone(description: "Main phone", number: "555444333")
let booking = Booking(sendSms: false, order: "8724897", priority: 2, phone: phone)
let confirmation = Confirmation(confirm: true, booking: booking)

do {     
    let data = try JSONEncoder().encode(confirmation)
    ...
} catch {
    print(error)
}