如何在 Swift 中使用 JSON 正文发出 HTTP Post 请求

How to make HTTP Post request with JSON body in Swift

提问by Stranger B.

I'm trying to make an HTTP post request with a JSON body :

我正在尝试使用 JSON 正文发出 HTTP post 请求：

How to be able to add an NSdictionnary to the HTTP request body.

如何能够将 NSdictionnary 添加到 HTTP 请求正文。

Here is my code, it doesn't seem to work properly.

这是我的代码，它似乎无法正常工作。

var entry1 = Response(IdQuestion: 6510,IdProposition: 10,Time: 30)
var entry2 = Response(IdQuestion: 8284,IdProposition: 10,Time: 30)
Responses.append(entry1)
Responses.append(entry2)

let list = Responses.map { 
// prepare json data
let json: [String: Any] = ["title": "ABC",
                           "dict": ["1":"First", "2":"Second"]]

let jsonData = try? JSONSerialization.data(withJSONObject: json)

// create post request
let url = URL(string: "http://httpbin.org/post")!
var request = URLRequest(url: url)
request.httpMethod = "POST"

// insert json data to the request
request.httpBody = jsonData

let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard let data = data, error == nil else {
        print(error?.localizedDescription ?? "No data")
        return
    }
    let responseJSON = try? JSONSerialization.jsonObject(with: data, options: [])
    if let responseJSON = responseJSON as? [String: Any] {
        print(responseJSON)
    }
}

task.resume()
.asDictionary }

let json = ["List":list,"IdSurvey":"102","IdUser":"iOSclient","UserInformation":"iOSClient"]


let data : NSData = NSKeyedArchiver.archivedDataWithRootObject(json)


NSJSONSerialization.isValidJSONObject(json)

let myURL = NSURL(string: "http://www.myserver.com")!
let request = NSMutableURLRequest(URL: myURL)
request.HTTPMethod = "POST"


 request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
    request.setValue("application/json", forHTTPHeaderField: "Accept")


request.HTTPBody = data
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
    data, response, error in
    println(response)
    // Your completion handler code here
}
task.resume()

回答by nRewik

Try this,

尝试这个，

let json = [ Activity.KEY_IDSUBJECT : activity.idSubject, Activity.KEY_RECORDMODE : "3", Activity.KEY_LOCATION_LONGITUDE : "0",Activity.KEY_LOCATION_LATITUDE : "0", Activity.KEY_CHECKIN : String(activity.dateCheckIn), Activity.KEY_CHECKOUT : String(activity.dateCheckOut) ]

do {
    let jsonData = try NSJSONSerialization.dataWithJSONObject(json, options: .PrettyPrinted)

    // create post request
    let url = NSURL(string: "https://...appspot.com/_ah/api/activityendpoint/v1/activity")!
    let request = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "POST"

    // insert json data to the request
    request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
    request.HTTPBody = jsonData


    let task = NSURLSession.sharedSession().dataTaskWithRequest(request){ data, response, error in
        if error != nil{
            print("Error -> \(error)")
            return
        }

        do {
            let result = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? [String:AnyObject]

            print("Result -> \(result)")

        } catch {
            print("Error -> \(error)")
        }
    }

    task.resume()
    return task
} catch {
    print(error)
}

or try a convenient way Alamofire

或尝试一种方便的方式Alamofire

回答by Bernauer

HTTP Post in Swift capturing the errors

Swift 中的 HTTP Post 捕获错误

func postRequest(username: String, password: String, completion: @escaping ([String: Any]?, Error?) -> Void) {

    //declare parameter as a dictionary which contains string as key and value combination.
    let parameters = ["name": username, "password": password]

    //create the url with NSURL
    let url = URL(string: "https://www.myserver.com/api/login")!

    //create the session object
    let session = URLSession.shared

    //now create the Request object using the url object
    var request = URLRequest(url: url)
    request.httpMethod = "POST" //set http method as POST

    do {
        request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) // pass dictionary to data object and set it as request body
    } catch let error {
        print(error.localizedDescription)
        completion(nil, error)
    }

    //HTTP Headers
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("application/json", forHTTPHeaderField: "Accept")

    //create dataTask using the session object to send data to the server
    let task = session.dataTask(with: request, completionHandler: { data, response, error in

        guard error == nil else {
            completion(nil, error)
            return
        }

        guard let data = data else {
            completion(nil, NSError(domain: "dataNilError", code: -100001, userInfo: nil))
            return
        }

        do {
            //create json object from data
            guard let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] else {
                completion(nil, NSError(domain: "invalidJSONTypeError", code: -100009, userInfo: nil))
                return
            }
            print(json)
            completion(json, nil)
        } catch let error {
            print(error.localizedDescription)
            completion(nil, error)
        }
    })

    task.resume()
}

@objc func submitAction(_ sender: UIButton) {
    //call postRequest with username and password parameters
    postRequest(username: "username", password: "password") { (result, error) in
    if let result = result {
        print("success: \(result)")
    } else if let error = error {
        print("error: \(error.localizedDescription)")
    }
}

回答by Suhit Patil

Swift 4 and 5

斯威夫特 4 和 5

HTTP POST requestusing URLSession APIin Swift 4

HTTP POST request使用URLSession API在夫特4

let parameters = ["name": "username", "password": "password123"]
Alamofire.request("https://www.myserver.com/api/login", method: .post, parameters: parameters, encoding: URLEncoding.httpBody)

Using Alamofire:

使用 Alamofire：

import UIKit
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

let url = URL(string: "http://localhost:8080/new")!
let jsonDict = ["firstName": "Jane", "lastName": "Doe"]
let jsonData = try! JSONSerialization.data(withJSONObject: jsonDict, options: [])

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

let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
    if let error = error {
        print("error:", error)
        return
    }

    do {
        guard let data = data else { return }
        guard let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: AnyObject] else { return }
        print("json:", json)
    } catch {
        print("error:", error)
    }
}

task.resume()

回答by Imanou Petit

The following Swift 5 Playground code shows a possible way to solve your problem using JSONSerializationand URLSession:

以下 Swift 5 Playground 代码显示了使用JSONSerializationand解决问题的可能方法URLSession：

let url = URL(string: "url")!
var request = URLRequest(url: url)
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")

request.httpMethod = "POST"



let postString = "ChangeAccordingtoyourdata=\(paramOne)&ChangeAccordingtoyourdata2=\(paramTwo)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard let data = data, error == nil else {                                                 // check for fundamental networking error
        print("error=\(error)")
        return
    }

    if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {           // check for http errors
        print("statusCode should be 200, but is \(httpStatus.statusCode)")
        print("response = \(response)")

        SVProgressHUD.showError(withStatus: "Request has not submitted successfully.\nPlease try after some time")
    }

    let responseString = String(data: data, encoding: .utf8)
    print("responseString = \(responseString)")

    SVProgressHUD.showSuccess(withStatus: "Request has submitted successfully.\nPlease wait for a while")
    DispatchQueue.main.async {



    // enter code

    }

}
task.resume()

回答by Hitesh Chauhan

let dic = [
    "username":u,
    "password":p,
    "gems":g ]

回答by Fattie

Perfect nRewik answer updated to 2019:

完美的 nRewik 答案更新至 2019 年：

Make the dictionary:

制作字典：

var jsonData:Data?
do {
    jsonData = try JSONSerialization.data(
      withJSONObject: dic,
      options: .prettyPrinted)
} catch {
    print(error.localizedDescription)
}

Assemble it like this:

像这样组装它：

let url = URL(string: "https://blah.com/server/dudes/decide/this")!
var request = URLRequest(url: url)

request.setValue("application/json; charset=utf-8",
     forHTTPHeaderField: "Content-Type")
request.setValue("application/json; charset=utf-8",
     forHTTPHeaderField: "Accept") 
request.httpMethod = "POST"
request.httpBody = jsonData

Create the request exactly like this, notice it is a "post"

完全像这样创建请求，注意它是一个“帖子”

let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard let data = data, error == nil else {
        // check for fundamental networking error
        print("fundamental networking error=\(error)")
        return
    }

    if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {
        // check for http errors
        print("statusCode should be 200, but is \(httpStatus.statusCode)")
        print("response = \(response)")
    }

    let responseString = String(data: data, encoding: .utf8)
    print("responseString = \(responseString)")

Then send, checking for either a networking error (so, no bandwidth etc) or an error response from the server:

然后发送，检查网络错误（因此，没有带宽等）或来自服务器的错误响应：

func HTTPPostJSON(url: String,  data: NSData,
    callback: (String, String?) -> Void) {

        var request = NSMutableURLRequest(URL: NSURL(string: url)!)
        request.HTTPMethod = "POST"
        request.addValue("application/json",forHTTPHeaderField: "Content-Type")
        request.addValue("application/json",forHTTPHeaderField: "Accept")
        request.HTTPBody = data
        HTTPsendRequest(request, callback: callback)
}

func HTTPsendRequest(request: NSMutableURLRequest,
    callback: (String, String?) -> Void) {
        let task = NSURLSession.sharedSession()
            .dataTaskWithRequest(request) {
                (data, response, error) -> Void in
                if (error != nil) {
                    callback("", error.localizedDescription)
                } else {
                    callback(NSString(data: data,
                        encoding: NSUTF8StringEncoding)! as String, nil)
                }
        }

        task.resume()
}
//use
var data :Dictionary<String, AnyObject> = yourDictionaryData<--
var requestNSData:NSData = NSJSONSerialization.dataWithJSONObject(request, options:NSJSONWritingOptions(0), error: &err)!
HTTPPostJSON("http://yourPosturl..", data: requestNSData) { (response, error) -> Void in
    if error != nil{
        //error
        return;
    }

    println(response);
}

Fortunately it's now that easy.

幸运的是，现在就这么简单。

回答by Daniel Krom

you can do something like this:

你可以这样做：

    // prepare json data
    let mapDict = [ "1":"First", "2":"Second"]

    let json = [ "title":"ABC" , "dict": mapDict ] as [String : Any]
    let jsonData : NSData = NSKeyedArchiver.archivedData(withRootObject: json) as NSData

    // create post request
    let url = NSURL(string: "http://httpbin.org/post")!
    let request = NSMutableURLRequest(url: url as URL)
    request.httpMethod = "POST"

    // insert json data to the request
    request.httpBody = jsonData as Data


    let task = URLSession.shared.dataTask(with: request as URLRequest){ data,response,error in
        if error != nil{
            return
        }
        do {
            let result = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]

            print("Result",result!)

        } catch {
            print("Error -> \(error)")
        }
    }

    task.resume()

回答by Nikunj Patel

var request = URLRequest(url: URL(string: "http://yogpande.apphb.com/api/my/posttblhouse")!)
        request.httpMethod = "POST"
        let postString = "[email protected]&password=1234567"
        request.httpBody = postString.data(using: .utf8)
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            guard let data = data, error == nil else {
                print("error=(error)")
                return
            }

            if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {     
                print("statusCode should be 200, but is \(httpStatus.statusCode)")
                print("response = \(response)")

            }

            let responseString = String(data: data, encoding: .utf8)
            print("responseString = \(responseString)")
        }
        task.resume()
    }

回答by Neel Shah

let userlogin = User(username: username, password: password, deviceid:UIDevice.current.identifierForVendor!.uuidString)

    guard let uploadData = try? JSONEncoder().encode(userlogin) else {
        print("Error UploadData: ")
        return
    }

    let urlUser = URL(string: APPURL.apiURL)!

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

    var responseStatus = 0

    let task = URLSession.shared.uploadTask(with: request, from: uploadData) { data, response, error in
        if let error = error {
            let code = (error as NSError).code
            print("Error:\(code) : \(error.localizedDescription)")
            completion(code)
            return
        }  
      guard let response = response as? HTTPURLResponse else {
            print("Invalid response")
            return
        }
// do your response handling here ...

回答by andreas-supersmart

Swift4 - Apple Solution"POST" and "Codable"

Swift4 - Apple 解决方案“POST”和“Codable”

Uploading Data to a Website using request.httpmethod = "Post"and Codable Stucts:

使用request.httpmethod = "Post"和Codable Stucts将数据上传到网站 ：

@see: Listing 2 Configuring a URL request

@see：清单 2 配置 URL 请求

##代码##