Swift 4-使用URLSession获取上传图像进度 [英] Swift 4 - Get an Upload Image Progress using URLSession
问题描述
我下面有这种代码
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)
}
我的目标是使用API上传图像并获取图像也上传进度。图像被转换为base64，并插入到API的字符串后的< image_byte> \（data！）< / image_byte> 中。
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.
然后我得到的是这样的：
Then what I got was something like this:
已发送：32768 from ：927220
发送：65536从：927220
发送：131072从：927220
发送：163840从：927220
发送：262144从：927220
发送：294912从：927220
发送：360448从：927220
发送：393216从：927220
发送：425984从：927220
发送：491520从：927220
发送：524288从：927220
发送：557056从：927220
发送：589824从：927220
发送：622592从：927220
发送：655360从：927220
发送：688128从：927220
发送：720896从：927220
发送：786432从：927220
发送：819200从：927220
发送：851968从：927220
发送：927220从：927220
错误域= NSCocoaErrorDomain代码= 3840 JSON文本不是以数组或对象开头，并且没有允许设置片段的选项。
UserInfo = {NSDebugDescription = JSON文本不是以数组或
对象开头，并且没有允许设置片段的选项。}
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.}
但是，如果我使用其他类似的方法（不带uploadTask），则效果很好，但没有上传进度。
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)
}
})
我也尝试过 Alamofire 。带有请求功能的 Alamofire 是成功的，但仍然没有上传进度，而 Alamofire 具有上载函数（multipartformData）的错误：
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（原因：Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed（错误：Error Domain = NSCocoaErrorDomain代码= 3840字符3周围的值无效。 UserInfo = {NSDebugDescription =字符3周围的值无效}。）））
responseSerializationFailed(reason: Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(error: Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 3." UserInfo={NSDebugDescription=Invalid value around character 3.}))
我想知道我的代码是否有误。您能告诉我我该如何处理我的代码吗？还是问题出在我的API上，因为我的API只接受 base64 代码？
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?
如果您想查看我的 Alamofire 代码，它是有
If you want to see my Alamofire code, it was there
请，有人帮我解决这个问题。
Please, somebody help me to solve this problem.
谢谢！ ：）
编辑1
这是我通过请求函数得到的结果（没有上传功能）
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;
};
}
编辑2
这是 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)
}
}
推荐答案
对于具有大量参数的图像上传到服务器。尝试此代码 Alamofire 。它可以正常工作。
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)
}
}
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