How to add Array value to JSON Key in Swift - json

Question

How to add request.httpBody = getPostData(params: ["contactsList": ["1212121212, "5555555544"]]) in place of
let parameters = getPostString(params: ["contactsList":[phNumArray]])
below is working code but how to add phNumArray in palce of individual of individual numberes to contactsList
Postman output for API:
working code: anyone can copy paste to see output
import UIKit
class TestViewController: UIViewController {
var phNumArray = ["1111111111", "5555555544"]
override func viewDidLoad() {
super.viewDidLoad()
callPostApi()
}
func getPostString(params: [String: Any]) -> String {
var data = [String]()
for (key, value) in params {
data.append(key + "=\(value)")
}
print(data.map { String($0) }.joined(separator: "&"))
return data.map { String($0) }.joined(separator: "&")
}
func callPostApi() {
let url = URL(string: "http://itaag-env-1.ap-south-1.elasticbeanstalk.com/filter/taggedusers/")
guard let requestUrl = url else { fatalError() }
var request = URLRequest(url: requestUrl)
request.httpMethod = "POST"
request.setValue("EC3746E9-4DB4-42C7-9D8C-1542B18C2AC", forHTTPHeaderField: "deviceid")
request.setValue("5fe42fb3b54543a0bab5667cf96526f8", forHTTPHeaderField: "key")
request.setValue("personal", forHTTPHeaderField: "userType")
let parameters = getPostString(params: ["contactsList": ["5555555544", "11111111111"]])
print("json parameter phone numbers \(parameters)")
request.httpBody = parameters.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
let httpResponse = response as? HTTPURLResponse
// Check for Error
if let error = error {
print("Error took place \(error)")
return
}
if let data = data, let dataString = String(data: data, encoding: .utf8) {
print("Response data string:\n \(dataString)")
do {
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as! [String: Any]
print("fetching json \(json)")
let fetchStatus = json["userName"] as? String
print("fetching json userName \(String(describing: fetchStatus))")
let user = json["5555555544"] as? [String: Any]
let name = user?["userName"] as? String
print("first username \(name)")
} catch {}
}
}
task.resume()
}
}
please help me to solve the issue with contactsList value.

Answer 1

Update: All this time you were sending the request as JSON encoded instead of as form-data. I'm adding the code for that below, try it out:
class ViewController: UIViewController {
var phNumArray = ["1111111111", "5555555544"]
override func viewDidLoad() {
super.viewDidLoad()
callPostApi()
}
func getPostData(params: [String:Any]) -> Data? {
return try? JSONSerialization.data(withJSONObject: params, options: .prettyPrinted)
}
func callPostApi() {
let url = URL(string: "http://itaag-env-1.ap-south-1.elasticbeanstalk.com/filter/taggedusers/")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("EC3746E9-4DB4-42C7-9D8C-1542B18C2AC", forHTTPHeaderField: "deviceid")
request.setValue("5fe42fb3b54543a0bab5667cf96526f8", forHTTPHeaderField: "key")
request.setValue("personal", forHTTPHeaderField: "userType")
try? request.setMultipartFormData(["contactsList": "\(phNumArray)"], encoding: .utf8)
URLSession.shared.dataTask(with: request) { data, _, _ in
if let data = data, let json = try? JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
let user = json["5555555544"] as? [String: Any]
let name = user?["userName"] as? String
print("first username \(name)")
}
}.resume()
}
}
extension URLRequest {
public mutating func setMultipartFormData(_ parameters: [String: String], encoding: String.Encoding) throws {
let makeRandom = { UInt32.random(in: (.min)...(.max)) }
let boundary = String(format: "------------------------%08X%08X", makeRandom(), makeRandom())
let contentType: String = try {
guard let charset = CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(encoding.rawValue)) else {
throw MultipartFormDataEncodingError.characterSetName
}
return "multipart/form-data; charset=\(charset); boundary=\(boundary)"
}()
addValue(contentType, forHTTPHeaderField: "Content-Type")
httpBody = try {
var body = Data()
for (rawName, rawValue) in parameters {
if !body.isEmpty {
body.append("\r\n".data(using: .utf8)!)
}
body.append("--\(boundary)\r\n".data(using: .utf8)!)
guard
rawName.canBeConverted(to: encoding),
let disposition = "Content-Disposition: form-data; name=\"\(rawName)\"\r\n".data(using: encoding) else {
throw MultipartFormDataEncodingError.name(rawName)
}
body.append(disposition)
body.append("\r\n".data(using: .utf8)!)
guard let value = rawValue.data(using: encoding) else {
throw MultipartFormDataEncodingError.value(rawValue, name: rawName)
}
body.append(value)
}
body.append("\r\n--\(boundary)--\r\n".data(using: .utf8)!)
return body
}()
}
}
public enum MultipartFormDataEncodingError: Error {
case characterSetName
case name(String)
case value(String, name: String)
}
Instead of converting to JSON String and then converting it to Data, use JSONSerialization, here's an example:
func getPostData(params:[String:Any]) -> Data? {
return try? JSONSerialization.data(withJSONObject: params, options: .prettyPrinted)
}
And then assign it directly to URLRequest's httpBody, like this:
let arrayOfNumbers = [String]()
arrayOfNumbers.append("5555555544")
arrayOfNumbers.append("11111111111")
request.httpBody = getPostData(params: ["contactsList": arrayOfNumbers])
Also, go through the Apple Documentation, you'll find valuable information there. If don't understand concepts there google more about JSONSerializing and POST request httpBody.