问题
I have this kind of code below
func upload(){
let img = UIImage(named: "1")
let imgData = UIImageJPEGRepresentation(img!, 1)
let data = imgData?.base64EncodedString()
var request = URLRequest(url: URL(string: url)!)
request.httpMethod = "POST"
request.setValue("\(auth)", forHTTPHeaderField: "Authorization")
request.setValue("application/xml", forHTTPHeaderField: "Content-Type")
var postString = "<uploadrequest>"
postString += "<folderid>123</folderid>"
postString += "<folder_name>images</folder_name>"
postString += "<image_byte>\(data!)</image_byte>"
postString += "</uploadrequest>"
request.httpBody = postString.data(using: .utf8)
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration: configuration, delegate: self, delegateQueue: OperationQueue.main)
let task = session.uploadTask(with: request, from: imgData!, completionHandler: {
(data, response, error) -> Void in
if let error = error {
print(error)
return
}
if let data = data {
_ = self.parseJsonData(data: data)
}
})
task.resume()
}
func urlSession(_ session: URLSession, task: URLSessionTask, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64) {
print("sent:", totalBytesSent, "from:", totalBytesExpectedToSend)
let size = totalBytesSent / totalBytesExpectedToSend
self.progressbar.progress = Float(size)
}
My target is to upload an image using API and get its upload progress too. The image is converted into base64 and inserted at <image_byte>\(data!)</image_byte> on the poststring of the API.
Then what I got was something like this:
sent: 32768 from: 927220 sent: 65536 from: 927220 sent: 131072 from: 927220 sent: 163840 from: 927220 sent: 262144 from: 927220 sent: 294912 from: 927220 sent: 360448 from: 927220 sent: 393216 from: 927220 sent: 425984 from: 927220 sent: 491520 from: 927220 sent: 524288 from: 927220 sent: 557056 from: 927220 sent: 589824 from: 927220 sent: 622592 from: 927220 sent: 655360 from: 927220 sent: 688128 from: 927220 sent: 720896 from: 927220 sent: 786432 from: 927220 sent: 819200 from: 927220 sent: 851968 from: 927220 sent: 927220 from: 927220 Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
But if I am using other methods like this (without uploadTask), it works good but got no upload progress.
let task = URLSession.shared.dataTask(with: request, completionHandler: {
(data, response, error) -> Void in
if let error = error {
print(error)
return
}
if let data = data {
_ = self.parseJsonData(data: data)
}
})
I've tried Alamofire too. Alamofire with request function was success but still gave no upload progress and Alamofire with uploadfunction (multipartformData) make this error:
responseSerializationFailed(reason: Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(error: Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 3." UserInfo={NSDebugDescription=Invalid value around character 3.}))
I want to know if I make a mistake on my code. Could you tell me what should I do with my code? Or the problem was my API because my API just accepts a base64 code?
If you want to see my Alamofire code, it was there
Please, somebody help me to solve this problem.
Thanks! :)
EDIT 1
This is my result by the request function (without upload function)
{
"media_preview" = {
"image_media" = {
fileid = 4928501;
filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
folderpath = "product\\66861/images800\\";
height = 533;
src = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
width = 800;
};
"medium_media" = {
fileid = 4928503;
filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
folderpath = "product\\66861/images500\\";
height = 333;
src = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
width = 500;
};
"small_media" = {
fileid = 4928503;
filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
folderpath = "\product\\66861/images300\\";
height = 200;
src = "/zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
width = 300;
};
"source_media" = {
fileid = 4928499;
filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
folderpath = "\\product\\66861images\\";
height = 666;
src = "/zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
width = 999;
};
"thumbnail_media" = {
fileid = 4928507;
filename = "zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
folderpath = \\product\\66861/thumb\\";
height = 150;
src = "/zhzvoHBb1ogda9bps13R5IavYiadCm.jpg";
width = 150;
};
};
responsestatus = {
"access_token" = "<null>";
code = 00;
description = Success;
};
}
EDIT 2
This is the code of parseJsonData(data: Data)
func parseJsonData(data: Data) {
do {
let jsonResult = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.mutableContainers) as? NSDictionary
print(jsonResult!)
} catch {
print(error)
}
}
回答1:
For image with multple Paramaters Uploading to server. Try this code Alamofire. Its going to work.
Alamofire.upload(multipartFormData: { (multipartFormData : MultipartFormData) in
let count = imageToUpload.count
for (key, value) in parameters {
multipartFormData.append((value as AnyObject).data(using: String.Encoding.utf8.rawValue)!, withName: key)
}
for i in 0..<count{
let image:UIImage = self.loadImage(imageToUpload[i])
if let imageData = image.jpegData(compressionQuality: 0.5) {
let imageName = "image[\(i)]"
multipartFormData.append(imageData as Data, withName:imageName , fileName: imageToUpload[i], mimeType: "image/jpeg")
}
}
}, usingThreshold: UInt64.init(), to: serviceUrl, method: .post, headers: headers) { (result) in
switch result {
case .success(let upload, _ , _):
upload.uploadProgress(closure: { (progress) in
print("uploding: \(progress.fractionCompleted)")
})
upload.responseJSON { response in
if response.result.isFailure {
if let err = response.error{
print(err)
}
return
}
guard let jsonData = response.result.value else {
return
}
//
do{
let json = try JSONSerialization.jsonObject(with: response.data as! Data, options: [])
print("josnResposne:\(json)")
} catch let parsingError {
print("Error", parsingError)
}
}
case .failure(let encodingError):
print("failed")
print(encodingError)
}
}
回答2:
for getting progress use following delegate method of URLSession, You can get progress in didReceiveData method
func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveResponse response: NSURLResponse, completionHandler: (NSURLSessionResponseDisposition) -> Void) {
//here you can get full lenth of your content
expectedContentLength = Int(response.expectedContentLength)
println(expectedContentLength)
completionHandler(NSURLSessionResponseDisposition.Allow)
}
func URLSession(session: NSURLSession, dataTask: NSURLSessionDataTask, didReceiveData data: NSData) {
buffer.appendData(data)
let percentageDownloaded = Float(buffer.length) / Float(expectedContentLength)
progress.progress = percentageDownloaded
}
func URLSession(session: NSURLSession, task: NSURLSessionTask, didCompleteWithError error: NSError?) {
//use buffer here.Download is done
progress.progress = 1.0 // download 100% complete
}
来源：https://stackoverflow.com/questions/53650584/swift-4-get-an-upload-image-progress-using-urlsession