如何通過iOS中的認證網址下載文件？

Question

我使用NSURLConnection通過https進行身份驗證，工作正常，但使用NSData下載文件時，我無法訪問內容。如何通過經過驗證的網址下載文件？

這裏就是我試圖讀取下載的文件的內容（這裏不包括認證碼），服務器說，「用戶未授權」：

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 

NSFileManager *fileManager = [NSFileManager defaultManager]; 

      // Attempt to open the file and write the downloaded data to it 
      if (![fileManager fileExistsAtPath:documentsDirectory2]) { //download path 
       [fileManager createFileAtPath:documentsDirectory2 contents:nil attributes:nil]; 
      } 
      // Append data to end of file 
      NSFileHandle *fileHandle = [NSFileHandle fileHandleForWritingAtPath:documentsDirectory2]; 
      [fileHandle seekToEndOfFile]; 
      [fileHandle writeData:data]; 
      [fileHandle closeFile]; 



      //data.txt exists, read me its content 
      NSArray *paths8 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
      NSString *documentsDirectory8 = [paths8 objectAtIndex:0]; 
      NSString *filePath8 = [documentsDirectory8 stringByAppendingPathComponent:@"data.txt"]; 
      NSString *content8 = [NSString stringWithContentsOfFile:filePath8 encoding:NSUTF8StringEncoding error:NULL]; 
      NSLog(@"WHATS INSIDE DATA.TXT? =%@", content8); 

      [self.responseData appendData:data]; 
      } 

Answer 1

您需要使用NSURLCredential來在實現NSURLConnectionDelegate時進行身份驗證。

繼承人例如：

-(BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace 
{ 
    return YES; 
} 

-(void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge 
{ 
    NSURLCredential *credential = [NSURLCredential credentialWithUser:username 
                  password:passwd] 
                  persistence:NSURLCredentialPersistenceForSession]; 

    [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge]; 
}