Question

我在stackoverflow中搜索了所有可用的解决方案。仍然对此感到困惑。
如果我有任何错误，请指出我。我收到401错误。

NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL        URLWithString:@"http://qa.api.xxxxxx.com/v0/jobs/93033"]];
NSString *authStr = @"xxxxxxxx:xxxxxxxxxxx";
NSData *authData = [authStr dataUsingEncoding:NSUTF8StringEncoding];
NSString *authValue = [NSString stringWithFormat:@"Basic %@",[authData base64EncodedStringWithOptions:0]];
[request setValue:authValue forHTTPHeaderField:@"Authorization"];
request.HTTPMethod = @"GET";
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];
//create the task
NSURLSessionDataTask* task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
    if (httpResponse.statusCode == 200)
    {
        NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
        NSLog(@"%@",json);
        dispatch_async(dispatch_get_main_queue(), ^{
        });
    } else {
        // failure: do something else on failure
        NSLog(@"httpResponse code: %@", [NSString stringWithFormat:@"%ld", (unsigned long)httpResponse.statusCode]);
        NSLog(@"httpResponse head: %@", httpResponse.allHeaderFields);
        return;
    }

}];

[task resume];

Answer 1

也许您的请求被重定向到其他地方，其中包含一个新请求，该请求由NSURLSession自动生成，没有授权标头。

您可以使用Wireshark跟踪您的请求。

如果您的请求被重定向，您可以使用以下方法确保新请求与身份验证信息一起发送：

<强> 1。使用委托方法处理身份验证

- (void)URLSession:(NSURLSession *)session 
              task:(NSURLSessionTask *)task 
didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge 
 completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition, NSURLCredential *))completionHandler {
    if (challenge.previousFailureCount > 1) {
        completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
    }else {
        NSURLCredential *credential = [NSURLCredential credentialWithUser:@"user"
                                                                 password:@"pswd"
                                                              persistence:NSURLCredentialPersistenceForSession];
        completionHandler(NSURLSessionAuthChallengeUseCredential, credential);
    }
}

应该是处理身份验证的最佳方式。

<强> 2。使用委托方法将身份验证标头添加到新请求

- (void)URLSession:(NSURLSession *)session
              task:(NSURLSessionTask *)task
willPerformHTTPRedirection:(NSHTTPURLResponse *)response
        newRequest:(NSURLRequest *)request
 completionHandler:(void (^)(NSURLRequest *))completionHandler {
    NSMutableURLRequest *newRequest = request.mutableCopy;
    // Add authentication header here.
    completionHandler(newRequest);
}

请求重定向时再次添加身份验证标头。

第3。将身份验证标头设置为NSURLSession的附加标头

NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
config.HTTPAdditionalHeaders = @{@"Authorization":@"Basic xxxxxxxxxxxxxxxxxx"};
NSURLSession *session = [NSURLSession sessionWithConfiguration:config];

确保NSURLSession使用该身份验证标头创建新请求。

Answer 2

在执行base64之后，authValue的输出可能包含新行，尝试记录字符串并删除新行，否则标题将不会设置。

Answer 3

使用didReceiveAuthenticationChallenge方法，是在iOS中使用基本授权的正确方法。

请求：

 NSURL *URL = [NSURL URLWithString:@"http://qa.api.freshersworld.com/v0/jobs/93033"];
 NSURLRequest *request = [NSURLRequest requestWithURL:URL
                                             cachePolicy:NSURLRequestUseProtocolCachePolicy
                                         timeoutInterval:30.0];

 NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
 [connection start];

代表：

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

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
      NSLog(@"%@", response);
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
      NSString* responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
      NSLog(@"%@", responseString);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
}

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

具有基本认证挑战的NSURLSession

3 个答案: