Swift 和 Alamofire API 调用：读取参数时遇到问题

Question

我正在使用 Alamofire 4 和 Swift 4。我正在尝试发出一个 API 请求，该请求传递了一个名为 Body 的参数，它是一个 JSON 字符串。 JSON 字符串应如下所示：

{
    "BirthDate": "1985-02-08",
    "GivenName": "mary",
    "FamilyName": "lee",
    "LicenceNumber": "94977000",
    "StateOfIssue": "ACT"
}

我的代码在调试控制台中返回以下结果：

{
  "result" : {
    "statuscode" : "400",
    "error" : [
      "GivenName needs to be a string",
      "FamilyName needs to be a string",
      "BirthDate needs to be a string",
      "LicenceNumber needs to be a string",
      "StateOfIssue needs to be a string",
      "MiddleName needs to be a string",
      "GivenName needs a value",
      "FamilyName needs a value",
      "BirthDate needs a value",
      "LicenceNumber needs a value",
      "StateOfIssue needs a value"
    ]
  }
}

我的代码如下：

public func testApi(){

    let headers = ["token":self.APIkey, "Content-Type": "application/x-www-form-urlencoded"]
    let url = self.testApiUrl

    let bodyString : String = "{\"BirthDate\":\"1985-02-08\",\"GivenName\":\"mary\",\"FamilyName\":\"lee\",\"LicenseNumber\":\"94977000\",\"StateOfIssue\":\"ACT\"}"
    let params : [String:String] = ["Body":"\(bodyString)"]

    Alamofire.request(url, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers)
        .responseJSON { response in

            if let apiResponse = response.result.value as? [String : AnyObject] {
                print("params is \(params)")
                if apiResponse["exceptionId"] as? String == nil {

                    print(apiResponse)

                    return
                }
            }
    }

}

有人可以帮忙吗？我尝试将 Body 字符串分解为字典级别（例如 Body: [name:Mary ... etc]），但这也不起作用，API 文档说应该传递 1 个名为 Body 的参数，它是一个字符串。

Answer 1

试试下面的代码

public func testApi(){

    //replace "application/x-www-form-urlencoded" with "application/json"
    //let headers = ["token":self.APIkey, "Content-Type": "application/x-www-form-urlencoded"]

    let headers = ["token":self.APIkey, "Content-Type": "application/json"]
    let url = "https://sandbox.rapidid.com.au/dvs/driverLicence"

    let bodyString: [String: Any] = [
        "BirthDate": "1985-02-08",
        "GivenName": "mary",
        "FamilyName": "lee",
        "LicenceNumber": "94977000",
        "StateOfIssue": "ACT"
    ]
    //I think you don't want "Body" in request
    //let params : [String: Any] = ["Body": bodyString]

    //replace params with bodyString
    Alamofire.request(url, method: .post, parameters: bodyString, encoding: JSONEncoding.default, headers: headers)
        .responseJSON { response in

            if let apiResponse = response.result.value as? [String : AnyObject] {
                print("params is \(bodyString)")
                if apiResponse["exceptionId"] as? String == nil {
                    print(apiResponse)
                    return
                }
            }
    }
}

Answer 2

通常当通过传递 JSON 数据进行 POST 请求时，数据在正文中传递。

...API 文档说应该传递 1 个称为 Body 的参数，它是一个字符串

如果我理解正确，那么 API 期望在 post 请求的正文中包含 JSON 数据。

看起来您没有正确编码 JSON。以下是解决方法...

public func testApi() {

    let headers = ["token":self.APIkey, "Content-Type": "application/x-www-form-urlencoded"]
    let url = self.testApiUrl

    let bodyString: [String: Any] = [
        "BirthDate": "1985-02-08",
        "GivenName": "mary",
        "FamilyName": "lee",
        "LicenceNumber": "94977000",
        "StateOfIssue": "ACT"
    ]
    let params : [String: Any] = ["Body": bodyString]

    Alamofire.request(url, method: .post, parameters: params, encoding: JSONEncoding.default, headers: headers)
        .responseJSON { response in

            if let apiResponse = response.result.value as? [String : AnyObject] {
                print("params is \(params)")
                if apiResponse["exceptionId"] as? String == nil {
                    print(apiResponse)
                    return
                }
            }
    }
}

希望这可以解决它。 但是，如果您需要将 JSON 作为参数传递，则需要将其编码到 URL 中。看看这个answer。