使用 ios10 进行分段请求

Question

我正在使用 swift、iOS10 处理多部分请求。

使用以下代码将图像保存到服务器。并且当使用url打开图像时只收到404错误。

尽管参考网页，但我在代码中找不到问题 - https://newfivefour.com/swift-form-data-multipart-upload-URLRequest.html

请帮忙。

func connectToServerWithImage(urlString: String, param: Any, image: UIImage, target: NSObject, action: Selector) {
let url = URL(string: urlString)!
var request = URLRequest(url: url)
// set request configuration
let boundary = "Boundary-(UUID().uuidString)"
request.setValue("multipart/form-data; boundary=(boundary)", forHTTPHeaderField: "Content-Type")
request.httpMethod = "POST"
// set body
let body = NSMutableData()
let paramDic = param as! Dictionary<String, String>
// set param to body
for (key, value) in paramDic {
body.append("--(boundary)rn".data(using: .utf8, allowLossyConversion: false)!)
body.append("Content-Disposition: form-data; name="(key)"rnrn".data(using: .utf8)!)
body.append("(value)rn".data(using: .utf8)!)
}
// set image to body
let filename = paramDic["(paramDic["TYPE"]!)_MST_NO"]! + ".jpg"
body.append("--(boundary)rn".data(using: .utf8, allowLossyConversion: false)!)
body.append("Content-Disposition: form-data; name="file"; filename="(filename)"rnrn".data(using: .utf8, allowLossyConversion: false)!)
body.append("Content-Type: image/jpgrnrn".data(using: .utf8, allowLossyConversion: false)!)
body.append(UIImageJPEGRepresentation(image, 1)!)
body.append("rn".data(using: .utf8, allowLossyConversion: false)!)
body.append("--(boundary)--rn".data(using: .utf8, allowLossyConversion: false)!)
request.httpBody = body as Data
// url configuration
let urlConfig = URLSessionConfiguration.ephemeral
urlConfig.timeoutIntervalForRequest = 5
urlConfig.timeoutIntervalForResource = 5
let session = URLSession(configuration: urlConfig)
let dataTask = session.dataTask(with: request) { (data, response, error) in
session.finishTasksAndInvalidate()
DispatchQueue.main.async {
if error == nil {
if let httpUrlResponse = response as? HTTPURLResponse {
if httpUrlResponse.statusCode == 200 {
do {
let jsonObject: Dictionary<String, Any> = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! Dictionary<String, Any>
if jsonObject.isEmpty {
target.perform(action, with: ["RES_CODE:": "NULL"])
}
} catch let _ {}
}
}
}
}
}
dataTask.resume()
}

Answer 1

iOS10 中多部分 API 的示例代码：

func Api_MultiPart()
{       
var url_request  = URLRequest(url: URL(string: EmployerRegApi())!)
url_request.httpShouldHandleCookies = false
url_request.timeoutInterval = 60
url_request.httpMethod = "POST"
let boundary = "-----------Sample------------"
let form_data = "multipart/form-data; boundary=(boundary)"
url_request.setValue(form_data, forHTTPHeaderField: "Content-Type")
let body = NSMutableData()
/*----------------- Company -----------------*/
body.appendString("--(boundary)rn")
body.appendString("Content-Disposition: form-data; name="(str_company_name_key)rnrn")
body.appendString("(str_company_name_val)rn")
/*--------------- Address ID ---------------*/
body.appendString("--(boundary)rn")
body.appendString("Content-Disposition: form-data; name="(str_address2_key)rnrn")
body.appendString("(str_address_val)rn")
/*--------------- State Code ---------------*/
body.appendString("--(boundary)rn")
body.appendString("Content-Disposition: form-data; name="(str_country_key)rnrn")
body.appendString("(str_country_val)rn")
/*------------- Profile Image --------------*/
if (str_photo_val != nil)
{
body.appendString("--(boundary)rn")
let mimetype = "image/jpg"
let defFileName = generate_Image_Name_Multipart() //yourImageName.jpg
let imageData = UIImageJPEGRepresentation(str_photo_val!, 1)
body.appendString("Content-Disposition: form-data; name="(str_photo_key)"; filename="(defFileName)"rn")
body.appendString("Content-Type: (mimetype)rnrn")
body.append(imageData!)
body.appendString("rn")
}
body.appendString("--(boundary)rn")
url_request.httpBody = body as Data
let postLength: String = "(UInt(body.length))"
url_request.setValue(postLength, forHTTPHeaderField: "Content-Length")
let task = URLSession.shared.dataTask(with: url_request, completionHandler: { (data, response, error) in
if error != nil{
print("Error -> (String(describing: error))")
DispatchQueue.main.async {
hideLoadingHUD(for_view: self.view)
}
return
}
do {
let result = try JSONSerialization.jsonObject(with: data!, options: []) as? [String:AnyObject]
print("Result -> (String(describing: result))")
DispatchQueue.main.async {
hideLoadingHUD(for_view: self.view)
}
} catch {
print("Error -> (error)")
DispatchQueue.main.async {
hideLoadingHUD(for_view: self.view)
}
}
})
task.resume()
}

func generate_Image_Name_Multipart() -> String {
let min: Int = 1
let max: Int = 999
let randNum: Int = (Int(arc4random_uniform(3)) % Int((max - min) + min))
print("Random Number: (randNum)")
let dateformate = DateFormatter()
dateformate.dateFormat = "ddMMyyyyHHmmss"
let date: String = dateformate.string(from: Date())
let img_name: String = "iOS_(date)_(randNum).jpg"
return img_name
}