如何使用[String：Any]参数构造多部分表单数据请求

Question

我已经找到了这段代码https://github.com/Kilo-Loco/URLSessionMPFD ，它构造了multipart form-data但是当参数为[String: String]时，此代码有效。 我的参数是[String: Any] 。 如何使用[String: Any] ？

仅显示了相关的代码，希望足以理解我的问题。

typealias Parameters = [String: String]

func construct() {
    //let parameters = ["name": "MyTestFile123321","description": "My tutorial test file for MPFD uploads"]

    let parameters: [String : Any] = [
            "APIKey":apiKey,"accessToken":accessToken,
            "user":["email":emailTextField.text!],
            "profile":["name":nameTextField.text!,"dob":dateOfBirthTextField.text!
        ]

    let dataBody = createDataBody(withParameters: parameters, media: [mediaImage], boundary: boundary)

}
func createDataBody(withParameters params: Parameters?, media: [Media]?, boundary: String) -> Data {

    let lineBreak = "\r\n"
    var body = Data()

    if let parameters = params {
        for (key, value) in parameters {
            body.append("--\(boundary + lineBreak)")
            body.append("Content-Disposition: form-data; name=\"\(key)\"\(lineBreak + lineBreak)")
            body.append("\(value + lineBreak)")
        }
    }

    if let media = media {
        for photo in media {
            body.append("--\(boundary + lineBreak)")
            //...
        }
    }

    body.append("--\(boundary)--\(lineBreak)")

    return body
}

extension Data {
    mutating func append(_ string: String) {
        if let data = string.data(using: .utf8) {
            append(data)
        }
    }
}

Answer 1

尽管您最好确认服务器端框架是否可以处理这种类型的参数'name [key]'，但您可以像下面那样进行操作。 许多现代框架都可以。

相关： 如何发布具有multipart / form-data编码的数组？

    let parameters: [String : String] = [
        "APIKey":apiKey,
        "accessToken":accessToken,
        "user[email]":emailTextField.text!,
        "profile[name]":nameTextField.text!,
        "profile[dob]":dateOfBirthTextField.text!
    ]

Answer 2

我已经尝试在您提到的github项目中使用以下参数。

 // Try using this modified parameter in github project
  let parameters = ["user": ["name": "MyTestFile123321",
                               "description": "My tutorial test file for MPFD uploads"],"profile": ["title": "This is big title"]] as [String : Any]

我有[String:Any]更新代码

typealias Parameters = [String: Any]

func construct() {

    // Change it with it your parameter

     let parameters = ["user": ["name": "MyTestFile123321",
                               "description": "My tutorial test file for MPFD uploads"],"profile": ["title": "This is big title"]] as [String : Any]

     let dataBody = createDataBody(withParameters: parameters, media: [mediaImage], boundary: boundary)

}
func createDataBody(withParameters params: Parameters?, media: [Media]?, boundary: String) -> Data {

    let lineBreak = "\r\n"
    var body = Data()

      if let parameters = params {

        for (key, value) in parameters {

            if let sValue = value as? String {
                body.append("--\(boundary + lineBreak)")
                body.append("Content-Disposition: form-data; name=\"\(key)\"\(lineBreak + lineBreak)")
                body.append("\(sValue + lineBreak)")
            }else{
                if let dictionaryObj = value as? [String : String] {
                    for (key, value) in dictionaryObj {
                        body.append("--\(boundary + lineBreak)")
                        body.append("Content-Disposition: form-data; name=\"\(key)\"\(lineBreak + lineBreak)")
                        body.append("\(value + lineBreak)")
                    }
                }
            }


        }
    }

    if let media = media {
        for photo in media {
            body.append("--\(boundary + lineBreak)")
            //...
        }
    }

    body.append("--\(boundary)--\(lineBreak)")

    return body
}

extension Data {
    mutating func append(_ string: String) {
        if let data = string.data(using: .utf8) {
            append(data)
        }
    }
}

希望对您有帮助。 :)