nhanh chóng, gửi tệp đến máy chủ

Question

Tôi đang học nhanh và tôi gửi yêu cầu tới máy chủ bằng mã bên dưới. Nó hoạt động cho yêu cầu đơn giản và tôi nhận được phản hồi từ máy chủ. Vấn đề của tôi là tôi không thể gửi một tập tin đến máy chủ.

mã:

let parameters = parameter 

    let request = NSMutableURLRequest(URL: NSURL(string: requestUrl)!) 
    let boundaryConstant = "-----Boundary+\(arc4random())\(arc4random())" 


    let contentType = "multipart/form-data; boundary=" + boundaryConstant 
    let boundaryStart = "--\(boundaryConstant)\r\n" 
    let boundaryEnd = "--\(boundaryConstant)--\r\n" 

    let body:NSMutableString = NSMutableString(); 

    for (key, value) in parameters { 
     body.appendFormat(boundaryStart) 
     body.appendFormat("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n") 
     body.appendFormat("\(value)\r\n") 
    } 
    body.appendFormat(boundaryEnd) 


    request.HTTPMethod = "POST" 
    request.setValue(contentType, forHTTPHeaderField: "Content-Type") 

    request.HTTPBody = body.dataUsingEncoding(NSUTF8StringEncoding) 

    let task = NSURLSession.sharedSession().dataTaskWithRequest(request) { data, response, error in 

     guard error == nil && data != nil else { 
      // check for fundamental networking error 
      print("error=\(error)") 
      return 

     } 


     if let httpStatus = response as? NSHTTPURLResponse where httpStatus.statusCode != 200 {   // check for http errors 

      print("statusCode should be 200, but is \(httpStatus.statusCode)") 
      print("response = \(response)") 
     } 


     self.responseString = NSString(data: data!, encoding: NSUTF8StringEncoding)! 
     print("MMMMMMMM \(self.responseString)") 
     self.result = self.responseString.dataUsingEncoding(NSUTF8StringEncoding)! as NSData 
     callback(self.responseString) 

    } 

    print("code start") 
    task.resume() 

kết quả: tôi có thể gửi tập tin vào máy chủ bằng cách mã này:

override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 

    let request = createRequest() 
    let task = NSURLSession.sharedSession().dataTaskWithRequest(request) { data, response, error in 
     if error != nil { 
      // handle error here 
      print(error) 
      return 
     } 
     do { 
      if let responseDictionary = try NSJSONSerialization.JSONObjectWithData(data!, options: []) as? NSDictionary { 
       print("success == \(responseDictionary)") 

      } 
     } catch { 
      print(error) 

      let responseString = NSString(data: data!, encoding: NSUTF8StringEncoding) 
      print("responseString = \(responseString)") 
     } 
    } 
    task.resume() 


} 

func createRequest() -> NSURLRequest { 
    let param = [] 


    let boundary = generateBoundaryString() 

    let url = NSURL(string: "URl")! 
    let request = NSMutableURLRequest(URL: url) 
    request.HTTPMethod = "POST" 
    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type") 
    request.setValue("userValue", forHTTPHeaderField: "X-Client-user") 
    request.setValue("passValue", forHTTPHeaderField: "X-Access-pass") 


    //let path1 = NSBundle.mainBundle().pathForResource("voice", ofType: "png") as String! 
    request.HTTPBody = createBodyWithParameters(param, filePathKey: "voice", paths: ["pathURl"], boundary: boundary) 

    return request 
} 

func createBodyWithParameters(parameters: [String: String]?, filePathKey: String?, paths: [String]?, boundary: String) -> NSData { 
    let body = NSMutableData() 

    if parameters != nil { 
     for (key, value) in parameters! { 
      body.appendString("--\(boundary)\r\n") 
      body.appendString("Content-Disposition: form-data; name=\"\(key)\"\r\n\r\n") 
      body.appendString("\(value)\r\n") 
     } 
    } 

    if paths != nil { 
     for path in paths! { 
      let url = NSURL(fileURLWithPath: path) 
      let filename = url.lastPathComponent 
      let data = NSData(contentsOfURL: url)! 
      let mimetype = mimeTypeForPath(path) 

      body.appendString("--\(boundary)\r\n") 
      body.appendString("Content-Disposition: form-data; name=\"\(filePathKey!)\"; filename=\"\(filename!)\"\r\n") 
      body.appendString("Content-Type: \(mimetype)\r\n\r\n") 
      body.appendData(data) 
      body.appendString("\r\n") 
     } 
    } 

    body.appendString("--\(boundary)--\r\n") 
    return body 
} 

func generateBoundaryString() -> String { 
    return "Boundary-\(NSUUID().UUIDString)" 
} 


func mimeTypeForPath(path: String) -> String { 
    let url = NSURL(fileURLWithPath: path) 
    let pathExtension = url.pathExtension 

    if let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension! as NSString, nil)?.takeRetainedValue() { 
     if let mimetype = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?.takeRetainedValue() { 
      return mimetype as String 
     } 
    } 
    return "application/octet-stream"; 
} 

Answer 1

Khi bạn đọc ở đây, bạn nên sử dụng NSURLSession cho công việc HTTP, nó xa linh hoạt hơn và mạnh mẽ; và tôi nghĩ là mệnh để thay thế NSURLConnection ...

https://www.objc.io/issues/5-ios7/from-nsurlconnection-to-nsurlsession/

Dưới đây là một ví dụ cho bạn ...

func getMetaData(lePath:String, completion: (string: String?, error: ErrorType?) -> Void) { 
// **** get_metadata **** 
    let request = NSMutableURLRequest(URL: NSURL(string: "https://api.dropboxapi.com/2/files/get_metadata")!) 
    let session = NSURLSession.sharedSession() 
    request.HTTPMethod = "POST" 

    request.addValue("Bearer ab-blah-blah", forHTTPHeaderField: "Authorization") 
    request.addValue("application/json",forHTTPHeaderField: "Content-Type") 
    request.addValue("path", forHTTPHeaderField: lePath) 
    let cursor:NSDictionary? = ["path":lePath] 
    do { 
     let jsonData = try NSJSONSerialization.dataWithJSONObject(cursor!, options: []) 
     request.HTTPBody = jsonData 
     print("json ",jsonData) 
    } catch { 
     print("snafoo alert") 
    } 

    let task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in 
     if let error = error { 
      completion(string: nil, error: error) 
      return 
     } 
     let strData = NSString(data: data!, encoding: NSUTF8StringEncoding) 
     print("Body: \(strData)\n\n") 
     do { 
      let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options:NSJSONReadingOptions.MutableContainers); 
      self.jsonParser(jsonResult,field2file: "ignore") 
      for (key, value) in self.parsedJson { 
       print("key2 \(key) value2 \(value)") 
      } 

      completion(string: "", error: nil) 
     } catch { 
      completion(string: nil, error: error) 
     } 
    }) 
    task.resume() 

} 

Answer 2

Great câu trả lời ở trên .. Ở đây nó được cập nhật cho Swift3:

func getMetaData(lePath:String, completion: (string: String?, error: ErrorType?) -> Void) { 
// **** get_metadata **** 
    let request = NSMutableURLRequest(URL: NSURL(string: "https://api.dropboxapi.com/2/files/get_metadata")!) 
    let session = NSURLSession.sharedSession() 
    request.HTTPMethod = "POST" 

    request.addValue("Bearer ab-blah-blah", forHTTPHeaderField: "Authorization") 
    request.addValue("application/json",forHTTPHeaderField: "Content-Type") 
    request.addValue("path", forHTTPHeaderField: lePath) 
    let cursor:NSDictionary? = ["path":lePath] 
    do { 
     let jsonData = try NSJSONSerialization.dataWithJSONObject(cursor!, options: []) 
     request.HTTPBody = jsonData 
     print("json ",jsonData) 
    } catch { 
     print("snafoo alert") 
    } 

    let task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in 
     if let error = error { 
      completion(string: nil, error: error) 
      return 
     } 
     let strData = NSString(data: data!, encoding: NSUTF8StringEncoding) 
     print("Body: \(strData)\n\n") 
     do { 
      let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options:NSJSONReadingOptions.MutableContainers); 
      self.jsonParser(jsonResult,field2file: "ignore") 
      for (key, value) in self.parsedJson { 
       print("key2 \(key) value2 \(value)") 
      } 

      completion(string: "", error: nil) 
     } catch { 
      completion(string: nil, error: error) 
     } 
    }) 
    task.resume() 

}