Upload image with URLSession

Question

Trying to upload image to server but didn't succeed, here is my code, nothing happened, couldn't figure why. What could be wrong?

import Foundation
    
    extension URLRequest {
      
      mutating func setMultipartFormDataBody(params: [String: (Data?, filename: String?)]) {
        
        let boundary = UUID().uuidString
        
        self.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
        
        var body = Data()
        for (key, (data, filename)) in params {
          body.append("--\(boundary)\r\n")
          
          
          if let filename = filename {
            body.append("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(filename)\"\r\n")
          }
          else {
            body.append("Content-Disposition: form-data; name=\"\(key)\"\r\n")
          }
          
          body.append("\r\n")
          body.append(data ?? Data())
          body.append("\r\n")
        }
        
        body.append("--\(boundary)--")
        self.httpBody = body
      }
      
    }
    
    extension Data {
      mutating func append(_ s: String) {
        self.append(s.data(using: .utf8)!)
      }
    }

thats even not posting string to server added request task but the body ignored, must set the boundry and low level? URLSESSEION is not like ALAMOFIRE?

  let boundary = "Boundary-\(UUID().uuidString)"
  
  var request = URLRequest(url: URL(string: "url")!)
  request.httpMethod = "POST"
  request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
  request.httpBody = httpBody as Data
  URLSession.shared.dataTask(with: request) { data, response, error in
    // handle the response here
  }.resume()

And where is called setMultipartFormDataBody() ? That's only the URL modifications, not URLSession code. — Larme, Aug 18 '22 at 19:19
show us the code you use to call the server, not just the small bit you show. See also a how to present minimal code, https://stackoverflow.com/help/minimal-reproducible-example — workingdog support Ukraine, Aug 18 '22 at 22:22
You don't call `setMultipartFormDataBody()` in your edited question. You even set a new boudary? — Larme, Aug 19 '22 at 09:40
Does this answer your question? [Upload image with multipart form-data iOS in Swift](https://stackoverflow.com/questions/29623187/upload-image-with-multipart-form-data-ios-in-swift) — workingdog support Ukraine, Aug 19 '22 at 10:55
Thanks for answer, i tried that link examples, its work, but does it the correct way for upload? must set boundry and other stuff? is it better use alamofire? — chkml, Aug 19 '22 at 11:44
the first and most popular answer suggests `...No Need to use any library for upload images using multipart request...`. See also this gist: https://gist.github.com/nnsnodnb/efd4635a6be2be41fdb67135d2dd9257 — workingdog support Ukraine, Aug 19 '22 at 12:11
"must set boundry and other stuff? is it better use alamofire? " If you use multiform part data, yes, you need the boundaries. Alamofire just does it for you, in its internal code, that's all. — Larme, Aug 19 '22 at 13:32

Upload image with URLSession

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