Question

我需要从受密码保护的URL解析xml文件，我尝试了以下

NSURLCredential *credential = [NSURLCredential credentialWithUser:@"admin"  password:@"123456" persistence:NSURLCredentialPersistenceForSession];
NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]
                                         initWithHost:@"xyz.com"
                                         port:80
                                         protocol:@"http"
                                         realm:nil
                                         authenticationMethod:NSURLAuthenticationMethodDefault];  
[[NSURLCredentialStorage sharedCredentialStorage] setCredential:credential
                                             forProtectionSpace:protectionSpace];    
url = [NSURL URLWithString:urlString];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"GET"];
[request setValue:@"application/xml" forHTTPHeaderField:@"Content-Type"];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
NSURLResponse *response;
NSError *error;
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse: &response error: &error];   
 NSString *dataStr=[[NSString alloc]initWithData:returnData encoding:NSUTF8StringEncoding]; 
 NSLog(@"data == %@\n error in connecting == %@",dataStr,error);

我收到了以下回复

data == <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>401 Authorization Required</title>
</head><body>
<h1>Authorization Required</h1>
<p>This server could not verify that you
are authorized to access the document
requested.  Either you supplied the wrong
credentials (e.g., bad password), or your
browser doesn't understand how to supply
the credentials required.</p>
<p>Additionally, a 401 Authorization Required
error was encountered while trying to use an ErrorDocument to handle the request.</p>
</body></html>

连接错误==错误域= NSURLErrorDomain代码= -1012“操作无法完成。（NSURLErrorDomain错误-1012。）”UserInfo = 0x6e51b90 {NSErrorFailingURLKey = http://example.com/api/ID/password/xml/，

感谢任何帮助！

Answer 1

使用NSURLRequest访问服务器时，NSURLConnection的委托方法在身份验证受到质疑时提供通知方式

以下示例将展示一种处理要求凭据的网址的方法。

- (void)CallPasswordProtectedWebService
{
 NSURL *url = [NSURL URLWithString:@"your url"];
 NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
urlConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
}

//when server asks the credentials this event will fire

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

 if ([challenge previousFailureCount] == 0) {
    NSURLCredential *newCredential;
    newCredential=[NSURLCredential credentialWithUser:@"username"                                               password:@"password"                                              persistence:NSURLCredentialPersistenceNone];
    [[challenge sender] useCredential:newCredential
           forAuthenticationChallenge:challenge];
} else {
    [[challenge sender] cancelAuthenticationChallenge:challenge];
}
}

//when connection succeeds this event fires

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
 NSLog(@"Successfuly connected ");  

}

//when connection fails the below event fires 

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
 NSLog(@"connection failed");

}

希望这有帮助

Answer 2

在我的情况下，问题是由需要所有HTTPS调用的客户端证书的防火墙/代理引起的。我通过提供NSURLProtocol子类来处理身份验证挑战并提供此证书来解决此问题。

[NSURLProtocol registerClass:self];

//implement these methods
- (void)didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;

- (void)resolveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge withCredential:(NSURLCredential *)credential;

Answer 3

使用Xcode 6，我的应用程序不会在IOS 8平台上下载大量文件，尽管它在早期的IOS上工作正常。我的代码基本上与下面的代码一样，但是当验证质询出现时，错误仍然出现。

我必须将代码更改为

 if ([challenge previousFailureCount] == 0) {
    NSURLCredential *newCredential;
    newCredential=[NSURLCredential credentialWithUser:@"username"                                               password:@"password"                                              persistence:NSURLCredentialPersistenceForSession];
    [[challenge sender] useCredential:newCredential
           forAuthenticationChallenge:challenge];
} else {
   NSURLCredential *newCredential;
    newCredential=[NSURLCredential credentialWithUser:@"username"                                               password:@"password"                                              persistence:NSURLCredentialPersistenceForSession];
    [[challenge sender] useCredential:newCredential
           forAuthenticationChallenge:challenge];
}

当然这使IF语句变得多余（可以删除）。我没有解释，但即使在持久会话上也没有使用用户名和密码来回应挑战导致错误（-1012）。现在它就像早期的IOS一样工作

NSURLErrorDomain错误-1012

3 个答案: