Swift: Sending Images Object via URLRequest - ios

Question

I have an array of an object that has the following values:
var pictures = [Pictures]
struct Pictures: Codable, Hashable {
var picName1: String
var picName2: String
var picName3: String
var picFile1: UIImage
var picFile2: UIImage
var picFile3: UIImage
}
And I want to send it to my API through URLRequest.
I am encountering some issues with HTTP structuring.
I keep getting the response: "Failed to read the request form. Multipart body length limit 16384 exceeded."
This is my network/API call code:
func sendPicturesToServer() {
let url = URL(string: "https://myapicall.com/noodles")
let body = try! JSONEncoder().encode(pictures)
let boundary = "---------------------------14737809831466499882746641449"
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.httpBody = body
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
guard let data = data, error == nil else {
print(error?.localizedDescription ?? "No data")
return
}
do {
let serializedResponse = try JSONSerialization.jsonObject(with: data, options: .allowFragments)
print("Serialized Response: \(serializedResponse)")
} catch {
print(error)
}
}
task.resume()
}
}
Anyone have any suggestions?

Answer 1

func postApiDataWithMultipartForm<T:Decodable>(requestUrl: URL, request: ImageRequest, resultType: T.Type, completionHandler:#escaping(_ result: T)-> Void)
{
var urlRequest = URLRequest(url: requestUrl)
let lineBreak = "\r\n"
urlRequest.httpMethod = "post"
let boundary = "---------------------------------\(UUID().uuidString)"
urlRequest.addValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "content-type")
var requestData = Data()
requestData.append("--\(boundary)\r\n" .data(using: .utf8)!)
requestData.append("content-disposition: form-data; name=\"attachment\" \(lineBreak + lineBreak)" .data(using: .utf8)!)
requestData.append(request.attachment .data(using: .utf8)!)
requestData.append("\(lineBreak)--\(boundary)\r\n" .data(using: .utf8)!)
requestData.append("content-disposition: form-data; name=\"fileName\" \(lineBreak + lineBreak)" .data(using: .utf8)!)
requestData.append("\(request.fileName + lineBreak)" .data(using: .utf8)!)
requestData.append("--\(boundary)--\(lineBreak)" .data(using: .utf8)!)
urlRequest.addValue("\(requestData.count)", forHTTPHeaderField: "content-length")
urlRequest.httpBody = requestData
// let multipartStr = String(decoding: requestData, as: UTF8.self) //to view the multipart form string
URLSession.shared.dataTask(with: urlRequest) { (data, httpUrlResponse, error) in
if(error == nil && data != nil && data?.count != 0)
{
// let dataStr = String(decoding: requestData, as: UTF8.self) //to view the data you receive from the API
do {
let response = try JSONDecoder().decode(T.self, from: data!)
_=completionHandler(response)
}
catch let decodingError {
debugPrint(decodingError)
}
}
}.resume()
}