如何使用 [String: Any] 参数构造多部分表单数据请求

Question

我发现这段代码 https://github.com/Kilo-Loco/URLSessionMPFD 构造了 multipart form-data，但是当参数为 [String: String] 时它可以工作。我的参数是[String: Any]。如何使用 [String: Any]?

我只看到了相关代码，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

你可以像下面那样做，不过你最好确认你的服务器端框架是否可以处理这种类型的参数'name[key]'。许多现代框架都可以。

相关：How do I POST an array with multipart/form-data encoding?

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

Answer 2

我试过在你提到的那个github项目中使用下面的参数。

 // 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]

的更新代码

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)
        }
    }
}

希望对您有所帮助。 :)

如何使用 [String: Any] 参数构造多部分表单数据请求

How to construct multipart form-data request with [String: Any] parameters

post

multipartform-data

ios

swift