ios – OAuth 2承载授权头

通过对客户端API的更新,HTTPBasicAuthication方法已被替换为OAuth2承载授权头.

使用旧API,我将执行以下操作：

NSURLCredential *credential = [NSURLCredential credentialWithUser:self.account.username 
                                                         password:self.account.token 
                                                      persistence:NSURLCredentialPersistenceForSession];

NSURLProtectionSpace *space = [[NSURLProtectionSpace alloc] initWithHost:kAPIHost
                                                                    port:443
                                                                protocol:NSURLProtectionSpaceHTTPS
                                                                   realm:@"my-api"
                                                    authenticationMethod:NSURLAuthenticationMethodHTTPBasic];

但这不会与承载头部一起使用.

现在通常我只是添加标题我的自己添加如下：

NSString *authorization = [NSString stringWithFormat:@"Bearer %@",self.account.token];
[urlRequest setValue:authorization forHTTPHeaderField:@"Authorization"];

但这个解决方案的问题是API将大部分调用重定向到其他URL,这与安全性有关.
NSURLRequest被重定向后,授权头将从请求中删除,并且由于我无法将承载方法添加到NSURLCredentialStorage,所以在重定向后不能再进行身份验证.

什么是好的解决方案？我只能想到抓住重定向并修改NSURLRequest,所以它包括承载头.但是怎么样

[requestOperation setRedirectResponseBlock:^NSURLRequest *(NSURLConnection *connection,NSURLRequest *request,NSURLResponse *redirectResponse) {

        if ([request.allHTTPHeaderFields objectForKey:@"Authorization"] != nil) {
            return request;
        }

        NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] initWithURL:request.URL cachePolicy:request.cachePolicy timeoutInterval:request.timeoutInterval];
        NSString *authValue = [NSString stringWithFormat:@"Bearer %@",self.account.token];
        [urlRequest setValue:authValue forHTTPHeaderField:@"Authorization"];

        return  urlRequest;

    }];