Multi half add is returning Standing code 502 Swift iOS

I’m making an attempt to add picture utilizing URLSession with crucial params, it’s working in postman however not working in swift.

 func requestNativeImageUpload() {
        let testImage = UIImage(named: "sayHi")

        let url = URL(string: "https://www.api.com/knowledge/savePickerData")
        let boundary = generateBoundary()
        var request = URLRequest(url: url!)

        let parameters = ["pickerId": "100","walkerRfid": "10" ]

        guard let mediaImage = Media(withImage: testImage!, forKey: "picture") else { return }

        request.httpMethod = "POST"

        request.allHTTPHeaderFields = [
                    "X-User-Agent": "ios",
                    "Accept-Language": "en",
                    "Accept": "application/json",
                    "Content-Type": "multipart/form-data; boundary=(boundary)",
                ]

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

        let session = URLSession.shared
        session.dataTask(with: request) { (knowledge, response, error) in
            if let response = response {
                print(response)
            }

            if let knowledge = knowledge {
                do {
                    let json = strive JSONSerialization.jsonObject(with: knowledge, choices: [])
                    print(json)
                } catch {
                    print(error)
                }
            }
            }.resume()
    }


    func generateBoundary() -> String {
        return "Boundary-(NSUUID().uuidString)"
    }

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

        let lineBreak = "rn"
        var physique = Knowledge()

        if let parameters = params {
            for (key, worth) in parameters {
                physique.append("--(boundary + lineBreak)")
                physique.append("Content material-Disposition: form-data; title="(key)"(lineBreak + lineBreak)")
                physique.append("(worth + lineBreak)")
            }
        }

        if let media = media {
            for picture in media {
                physique.append("--(boundary + lineBreak)")
                physique.append("Content material-Disposition: form-data; title="(picture.key)"; filename="(picture.fileName)"(lineBreak)")
                physique.append("Content material-Sort: (picture.mimeType + lineBreak + lineBreak)")
                physique.append(picture.knowledge)
                physique.append(lineBreak)
            }
        }

        physique.append("--(boundary)--(lineBreak)")

        return physique
    }




extension Knowledge {
    mutating func append(_ string: String) {
        if let knowledge = string.knowledge(utilizing: .utf8) {
            append(knowledge)
        }
    }
}


struct Media {
    let key: String
    let fileName: String
    let knowledge: Knowledge
    let mimeType: String

    init?(withImage picture: UIImage, forKey key: String) {
        self.key = key
        self.mimeType = "picture/jpg"
        self.fileName = "(arc4random()).jpeg"

        guard let knowledge = picture.jpegData(compressionQuality: 0.5) else { return nil }
        self.knowledge = knowledge
    }
}

in Postman