Upload image with multipart form-data iOS in Swift
IosImageSwiftFile UploadMultipartform DataIos Problem Overview
i am having a problem with uploading image with multipart-form
here is my code i used from this answer
var request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"
var boundary = generateBoundaryString()
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
var body = NSMutableData()
if self.img.image != nil {
var imageData = UIImagePNGRepresentation(self.img.image)
if imageData != nil {
body.appendString("--\(boundary)\r\n")
body.appendString("Content-Disposition: form-data; name=\"image\"; filename=\"image.png\"\r\n")
body.appendString("Content-Type: image/png\r\n\r\n")
body.appendData(imageData!)
body.appendString("\r\n")
}
}
body.appendString("--\(boundary)--\r\n")
request.setValue("\(body.length)", forHTTPHeaderField:"Content-Length")
request.HTTPBody = body
then i use NSURLSession to apply the request
the server says that i didn't choose image to upload i only want to upload the image for now
do i have to use paths of images to upload any image or it's data is enough?
do i miss any thing , any help to understand this ?
Ios Solutions
Solution 1 - Ios
No Need to use any library for upload images using multipart request.
Swift 4.2
func uploadImage(paramName: String, fileName: String, image: UIImage) {
let url = URL(string: "http://api-host-name/v1/api/uploadfile/single")
// generate boundary string using a unique per-app string
let boundary = UUID().uuidString
let session = URLSession.shared
// Set the URLRequest to POST and to the specified URL
var urlRequest = URLRequest(url: url!)
urlRequest.httpMethod = "POST"
// Set Content-Type Header to multipart/form-data, this is equivalent to submitting form data with file upload in a web browser
// And the boundary is also set here
urlRequest.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
var data = Data()
// Add the image data to the raw http request data
data.append("\r\n--\(boundary)\r\n".data(using: .utf8)!)
data.append("Content-Disposition: form-data; name=\"\(paramName)\"; filename=\"\(fileName)\"\r\n".data(using: .utf8)!)
data.append("Content-Type: image/png\r\n\r\n".data(using: .utf8)!)
data.append(image.pngData()!)
data.append("\r\n--\(boundary)--\r\n".data(using: .utf8)!)
// Send a POST request to the URL, with the data we created earlier
session.uploadTask(with: urlRequest, from: data, completionHandler: { responseData, response, error in
if error == nil {
let jsonData = try? JSONSerialization.jsonObject(with: responseData!, options: .allowFragments)
if let json = jsonData as? [String: Any] {
print(json)
}
}
}).resume()
}
If you have any header to add, you can add it via urlRequest.setValue method.
Solution 2 - Ios
My version that 100% works. Maybe it will help you.
let url = "http://server/upload"
let img = UIImage(contentsOfFile: fullPath)
let data: NSData = UIImageJPEGRepresentation(img, 1)
sendFile(url,
fileName:"one.jpg",
data:data,
completionHandler: completionHandler:{
(result:Bool, isNoInternetConnection:Bool) -> Void in
// ...
NSLog("Complete: \(result)")
}
)
func sendFile(
urlPath:String,
fileName:String,
data:NSData,
completionHandler: (NSURLResponse!, NSData!, NSError!) -> Void){
var url: NSURL = NSURL(string: urlPath)!
var request1: NSMutableURLRequest = NSMutableURLRequest(URL: url)
request1.HTTPMethod = "POST"
let boundary = generateBoundary()
let fullData = photoDataToFormData(data,boundary:boundary,fileName:fileName)
request1.setValue("multipart/form-data; boundary=" + boundary,
forHTTPHeaderField: "Content-Type")
// REQUIRED!
request1.setValue(String(fullData.length), forHTTPHeaderField: "Content-Length")
request1.HTTPBody = fullData
request1.HTTPShouldHandleCookies = false
let queue:NSOperationQueue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(
request1,
queue: queue,
completionHandler:completionHandler)
}
// this is a very verbose version of that function
// you can shorten it, but i left it as-is for clarity
// and as an example
func photoDataToFormData(data:NSData,boundary:String,fileName:String) -> NSData {
var fullData = NSMutableData()
// 1 - Boundary should start with --
let lineOne = "--" + boundary + "\r\n"
fullData.appendData(lineOne.dataUsingEncoding(
NSUTF8StringEncoding,
allowLossyConversion: false)!)
// 2
let lineTwo = "Content-Disposition: form-data; name=\"image\"; filename=\"" + fileName + "\"\r\n"
NSLog(lineTwo)
fullData.appendData(lineTwo.dataUsingEncoding(
NSUTF8StringEncoding,
allowLossyConversion: false)!)
// 3
let lineThree = "Content-Type: image/jpeg\r\n\r\n"
fullData.appendData(lineThree.dataUsingEncoding(
NSUTF8StringEncoding,
allowLossyConversion: false)!)
// 4
fullData.appendData(data)
// 5
let lineFive = "\r\n"
fullData.appendData(lineFive.dataUsingEncoding(
NSUTF8StringEncoding,
allowLossyConversion: false)!)
// 6 - The end. Notice -- at the start and at the end
let lineSix = "--" + boundary + "--\r\n"
fullData.appendData(lineSix.dataUsingEncoding(
NSUTF8StringEncoding,
allowLossyConversion: false)!)
return fullData
}
Solution 3 - Ios
public func UPLOADIMG(url: String,parameters: Dictionary<String,AnyObject>?,filename:String,image:UIImage, success:((NSDictionary) -> Void)!, failed:((NSDictionary) -> Void)!, errord:((NSError) -> Void)!) {
var TWITTERFON_FORM_BOUNDARY:String = "AaB03x"
let url = NSURL(string: url)!
var request:NSMutableURLRequest = NSMutableURLRequest(URL: url, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalCacheData, timeoutInterval: 10)
var MPboundary:String = "--\(TWITTERFON_FORM_BOUNDARY)"
var endMPboundary:String = "\(MPboundary)--"
//convert UIImage to NSData
var data:NSData = UIImagePNGRepresentation(image)
var body:NSMutableString = NSMutableString();
// with other params
if parameters != nil {
for (key, value) in parameters! {
body.appendFormat("\(MPboundary)\r\n")
body.appendFormat("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n")
body.appendFormat("\(value)\r\n")
}
}
// set upload image, name is the key of image
body.appendFormat("%@\r\n",MPboundary)
body.appendFormat("Content-Disposition: form-data; name=\"\(filename)\"; filename=\"pen111.png\"\r\n")
body.appendFormat("Content-Type: image/png\r\n\r\n")
var end:String = "\r\n\(endMPboundary)"
var myRequestData:NSMutableData = NSMutableData();
myRequestData.appendData(body.dataUsingEncoding(NSUTF8StringEncoding)!)
myRequestData.appendData(data)
myRequestData.appendData(end.dataUsingEncoding(NSUTF8StringEncoding)!)
var content:String = "multipart/form-data; boundary=\(TWITTERFON_FORM_BOUNDARY)"
request.setValue(content, forHTTPHeaderField: "Content-Type")
request.setValue("\(myRequestData.length)", forHTTPHeaderField: "Content-Length")
request.HTTPBody = myRequestData
request.HTTPMethod = "POST"
// var conn:NSURLConnection = NSURLConnection(request: request, delegate: self)!
let task = NSURLSession.sharedSession().dataTaskWithRequest(request, completionHandler: {
data, response, error in
if error != nil {
println(error)
errord(error)
return
}
var parseError: NSError?
let responseObject: AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &parseError)
if let responseDictionary = responseObject as? NSDictionary {
success(responseDictionary)
} else {
}
})
task.resume()
}
Solution 4 - Ios
import Foundation
struct MultipartFormDataRequest {
private let boundary: String = UUID().uuidString
var httpBody = NSMutableData()
let url: URL
init(url: URL) {
self.url = url
}
func addTextField(named name: String, value: String) {
httpBody.appendString(textFormField(named: name, value: value))
}
private func textFormField(named name: String, value: String) -> String {
var fieldString = "--\(boundary)\r\n"
fieldString += "Content-Disposition: form-data; name=\"\(name)\"\r\n"
fieldString += "Content-Type: text/plain; charset=ISO-8859-1\r\n"
fieldString += "Content-Transfer-Encoding: 8bit\r\n"
fieldString += "\r\n"
fieldString += "\(value)\r\n"
return fieldString
}
func addDataField(fieldName: String, fileName: String, data: Data, mimeType: String) {
httpBody.append(dataFormField(fieldName: fieldName,fileName:fileName,data: data, mimeType: mimeType))
}
private func dataFormField(fieldName: String,
fileName: String,
data: Data,
mimeType: String) -> Data {
let fieldData = NSMutableData()
fieldData.appendString("--\(boundary)\r\n")
fieldData.appendString("Content-Disposition: form-data; name=\"\(fieldName)\"; filename=\"\(fileName)\"\r\n")
fieldData.appendString("Content-Type: \(mimeType)\r\n")
fieldData.appendString("\r\n")
fieldData.append(data)
fieldData.appendString("\r\n")
return fieldData as Data
}
func asURLRequest() -> URLRequest {
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
httpBody.appendString("--\(boundary)--")
request.httpBody = httpBody as Data
return request
}
}
extension NSMutableData {
func appendString(_ string: String) {
if let data = string.data(using: .utf8) {
self.append(data)
}
}
}
extension URLSession {
func dataTask(with request: MultipartFormDataRequest,
completionHandler: @escaping (Data?, URLResponse?, Error?) -> Void)
-> URLSessionDataTask {
return dataTask(with: request.asURLRequest(), completionHandler: completionHandler)
}
}
Use this function to call upload file func
func uploadFile(file:Data, fileName: String, fileExtension: String){
var mimeType = "image/png"
if fileExtension == "PDF" {
mimeType = "application/pdf"
}
let url = "https://v2.convertapi.com/upload"
let request = MultipartFormDataRequest(url: URL(string: url)!)
request.addDataField(fieldName: "file", fileName: fileName, data: file, mimeType: mimeType)
URLSession.shared.dataTask(with: request, completionHandler: {data,urlResponse,error in
}).resume()
}
#Resources:
https://www.donnywals.com/uploading-images-and-forms-to-a-server-using-urlsession/ https://orjpap.github.io/swift/http/ios/urlsession/2021/04/26/Multipart-Form-Requests.html
Solution 5 - Ios
I suggest this repository.
You can add pod 'MultipartForm' in the Podfile and then follow the example in the repository's readme:
import MultipartForm
let form = MultipartForm(parts: [
MultipartForm.Part(name: "a", value: "1"),
MultipartForm.Part(name: "b", value: "2"),
MultipartForm.Part(name: "c", data: imageData, filename: "3.png", contentType: "image/png"),
])
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue(form.contentType, forHTTPHeaderField: "Content-Type")
let task = session.uploadTask(with: request, from: form.bodyData)
task.resume()
It supports Swift Package Manager too.
Solution 6 - Ios
The first thing I noticed is the application/octet-stream as Conten-Type, this is usually used when the file type is unknown. Some web frameworks/libraries will reject this content-type if an image is required.
Second, I can't see the post length anywhere, try to add it:
body.appendString("--\(boundary)--\r\n")
// set the content-length
request.setValue("\(body.length)", forHTTPHeaderField:"Content-Length")
Solution 7 - Ios
class func postMultiPartdata( postdatadictionary: [AnyHashable: Any], apikey: String, completion: @escaping (Any) -> () ) {
if Utils().isConnectedToNetwork() == false
{
Utils().showMessage("Check internet")
return
}
let strURL = "http://redspark.biz/dropp/api/\(apikey)"
let url = URL(string: strURL)
var urlRequest = URLRequest(url: url!)
urlRequest.httpMethod = "POST"
let body = NSMutableData();
let boundary = "---------------------------14737809831466499882746641449"
let contentType = "multipart/form-data; boundary=\(boundary)"
urlRequest.addValue(contentType, forHTTPHeaderField: "Content-Type")
for (key, value) in postdatadictionary {
if(value is Data)
{
let TimeStamp = "\(Date().timeIntervalSince1970 * 1000)"
body.append("--\(boundary)\r\n".data(using: .utf8)!)
body.append("Content-Disposition: form-data; name=\"\(key)\"; filename=\"\(TimeStamp)\"\r\n".data(using:.utf8)!)
body.append("field_mobileinfo_image\r\n".data(using: .utf8)!)
body.append("--\(boundary)\r\n".data(using: .utf8)!)
body.append("Content-Disposition: form-data; name=\"files[field_mobileinfo_image]\"; filename=\"img.jpg\"\r\n".data(using: .utf8)!)
body.append("Content-Type: image/jpeg\r\n\r\n".data(using: .utf8)!)
// var imgData: Data? = nil
// if let aKey = value as? Data {
// imgData = NSData(data: aKey) as Data
// }
body.append(value as! Data)
}
else
{
if let anEncoding = "--\(boundary)\r\n".data(using: .utf8) {
body.append(anEncoding)
}
if let anEncoding = "Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n".data(using: .utf8) {
body.append(anEncoding)
}
if let aKey = postdatadictionary[key], let anEncoding = "\(aKey)".data(using: .utf8) {
body.append(anEncoding)
}
if let anEncoding = "\r\n".data(using: .utf8) {
body.append(anEncoding)
}
}
}
if let anEncoding = "--\(boundary)--\r\n".data(using: .utf8) {
body.append(anEncoding)
}
// setting the body of the post to the reqeust
urlRequest.httpBody = body as Data
URLSession.shared.dataTask(with:urlRequest) { (data, response, error) in
if error != nil {
print(error!)
completion("")
} else {
var dictonary:NSDictionary?
do {
dictonary = try JSONSerialization.jsonObject(with: data!, options: []) as? NSDictionary
if let myDictionary = dictonary
{
completion(myDictionary)
}
} catch let error as NSError {
completion(error)
}
}
Utils().HideLoader()
}.resume()
}
Solution 8 - Ios
following those answers here is my implementation with a concrete example for video and audio. notice that the boundary between elements has such form --boundary while the last boundary is written --boudary--.
let url = URL(string: "https://...")!
let boundary = UUID().uuidString
var request = URLRequest(url: url)
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
request.httpMethod = "post"
var data = Data()
data.addMultiPart(boundary: boundary, name: "metadata", filename: "metadata.json", contentType: "application/json", data: metaData)
let ext = fileUrl.pathExtension.lowercased()
let isImage = ["jpg","jpeg","png"].contains(ext)
let contentType = isImage ? "image/\(ext)" : "video/\(ext)"
let mediaData = try! Data(contentsOf: fileUrl)
data.addMultiPart(boundary: boundary, name: "file", filename: fileUrl.lastPathComponent, contentType: contentType, data: mediaData)
data.addMultiPartEnd(boundary: boundary)
request.httpBody = data
let task = session.dataTask(with: request)
task.resume()
private extension Data {
mutating func addMultiPart(boundary: String, name: String, filename: String, contentType: String, data: Data) {
print("adding boundary: \(boundary), name: \(name), filename: \(filename), contentType: \(contentType) data length: \(data.count) ")
self.append("\r\n--\(boundary)\r\n".data(using: .utf8)!)
self.append("Content-Disposition: form-data; name=\"\(name)\"; filename=\"\(filename)\"\r\n".data(using: .utf8)!)
self.append("Content-Type: \(contentType)\r\n\r\n".data(using: .utf8)!)
self.append(data)
}
mutating func addMultiPartEnd(boundary: String) {
self.append("\r\n--\(boundary)--\r\n".data(using: .utf8)!)
}
}
Solution 9 - Ios
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)
body.append("\r\n")
}
body.append("--\(boundary)--")
self.httpBody = body
}
}
extension Data {
mutating func append(_ s: String) {
self.append(s.data(using: .utf8)!)
}
}
Solution 10 - Ios
I implemented Upload image using Multi-part in Swift 4:
Here is the code. Please have a look
//MARK: Uplaod User Profile Pic
func uploadImageToServerFromApp(nameOfApi : NSString, parameters : NSString, uploadedImage : UIImage, withCurrentTask :RequestType, andDelegate :AnyObject)->Void {
if self.isConnectedToNetwork(){
currentTask = withCurrentTask
let myRequestUrl = NSString(format: "%@%@%@",GlobalConstants.KBaseURL,nameOfApi,parameters)
let url = (myRequestUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed))!
var request : NSMutableURLRequest = NSMutableURLRequest()
request = URLRequest(url: URL(string:url as String)!) as! NSMutableURLRequest
request.httpMethod = "POST"
let boundary = generateBoundaryString()
//define the multipart request type
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
let image_data = UIImagePNGRepresentation(uploadedImage)
if(image_data == nil){
return
}
let body = NSMutableData()
let fname = "image.png"
let mimetype = "image/png"
//define the data post parameter
body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
body.append("Content-Disposition:form-data; name=\"image\"\r\n\r\n".data(using: String.Encoding.utf8)!)
body.append("hi\r\n".data(using: String.Encoding.utf8)!)
body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
body.append("Content-Disposition:form-data; name=\"image\"; filename=\"\(fname)\"\r\n".data(using: String.Encoding.utf8)!)
body.append("Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)!)
body.append(image_data!)
body.append("\r\n".data(using: String.Encoding.utf8)!)
body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!)
request.httpBody = body as Data
let session = URLSession.shared
let task = session.dataTask(with: request as URLRequest) { (data, response, error) in
guard let data = data, error == nil else { // check for fundamental networking error
// print("error=\(String(describing: error))")
self.showAlertMessage(title: "App name", message: "Server not responding, please try later")
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 = \(String(describing: response))")
self.delegate?.internetConnectionFailedIssue()
}else{
do {
self.responseDictionary = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as! NSDictionary
// self.Responsedata = data as NSData
//self.responseDictionary = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as! [String: AnyObject] as NSDictionary;
self.delegate?.responseReceived()
} catch {
//print("error serializing JSON: \(error)")
}
}
}
task.resume()
}
else{
// print("Internet Connection not Available!")
self.showAlertMessage(title: "App Name", message: "No Internet Connection..")
}
}
func generateBoundaryString() -> String
{
return "Boundary-\(NSUUID().uuidString)"
}