Question

我正在尝试获取需要密码和用户名才能访问的网页内容。我正在使用NSURLConnection对象来获取它但是当我编写返回到文件的NSMutableData对象时，我得到的只是登录页面。通常，当您在未登录时尝试加载受密码保护的页面时，它会重定向到登录页面，但我认为如果我提供了有效的凭据，那么我将能够查看受密码保护的页面。此外，我不知道网站是否在IIS（互联网信息服务器）上使用微软mysql数据库是否相关。

注意：[protectionSpace authenticationMethod]返回NSURLAuthenticationMethodServerTrust

我对此非常不熟悉所以任何想法都会受到高度赞赏。

以下是所有相关代码：

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// This method is called when the server has determined that it
// has enough information to create the NSURLResponse.

// It can be called multiple times, for example in the case of a
// redirect, so each time we reset the data.

// receivedData is an instance variable declared elsewhere.
[receivedData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// Append the new data to receivedData.
// receivedData is an instance variable declared elsewhere.
[receivedData appendData:data];
}

- (void)connection:(NSURLConnection *)connection
  didFailWithError:(NSError *)error
{
// release the connection, and the data object
//[connection release];
// receivedData is declared as a method instance elsewhere
//[receivedData release];

// inform the user
NSLog(@"Connection failed! Error - %@ %@",
      [error localizedDescription],
      [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// do something with the data
// receivedData is declared as a method instance elsewhere
NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]);

// release the connection, and the data object
//[connection release];
//[receivedData release];



//Write data to a file
[receivedData writeToFile:@"/Users/matsallen/Desktop/receivedData.html" atomically:YES];
}

- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:            (NSURLProtectionSpace *)protectionSpace
{
NSLog(@"The connection encountered a protection space. The authentication method is %@",    [protectionSpace authenticationMethod]);
secureTrustReference = [protectionSpace serverTrust];
//SecTrustResultType *result;
//OSStatus status = SecTrustEvaluate(secureTrustReference, result);
//NSLog(@"Result of the trust evaluation is %@",status);
return YES;
}

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{

NSURLCredential *newCredential;
newCredential = [NSURLCredential credentialWithUser:@"username" password:@"password" persistence:NSURLCredentialPersistenceForSession];
newCredential = [NSURLCredential credentialForTrust:secureTrustReference];
//    [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
//    [[challenge sender] continueWithoutCredentialForAuthenticationChallenge:challenge];
}


#pragma mark - View lifecycle

- (void)viewDidLoad
{
receivedData = [[NSMutableData alloc] init];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
// Create the request.
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.markallenonline.com/secure/maoCoaching.aspx"]
                                    cachePolicy:NSURLRequestUseProtocolCachePolicy
                                    timeoutInterval:60.0];
// create the connection with the request
// and start loading the data
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if (theConnection) {
    // Create the NSMutableData to hold the received data.
    // receivedData is an instance variable declared elsewhere.
    receivedData = [NSMutableData data];
    NSLog(@"Connection succeeded!");
} else {
    // Inform the user that the connection failed.
    NSLog(@"Connection failed!");
}
}

Answer 1

您需要实现回调：

 -(void) connection:(NSURLConnection *)connection
         didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;

并从里面传递信誉。

Answer 2

尝试使用此代码而不是您拥有的代码：

- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
if ([challenge previousFailureCount] == 0) {
    NSLog(@"received authentication challenge");
    NSURLCredential *newCredential = [NSURLCredential credentialWithUser:@"???????"
                                                                password:@"???????"
                                                             persistence:NSURLCredentialPersistenceForSession];
    NSLog(@"credential created");
    [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
    NSLog(@"responded to authentication challenge");    
}
else {
    NSLog(@"previous authentication failure");
}

}

我使用此代码，在我的情况下，我可以登录受保护的页面。

Answer 3

尝试ASIHTTPRequest，它具有Basic，Digest和NTLM身份验证支持。

http://allseeing-i.com/ASIHTTPRequest/

祝你好运！

无法使用NSURLConnection获取受密码/用户名保护的网页的内容

3 个答案: