通过MPMoviePlayer传输带有凭据的大电影

Question

我一直在尝试从一个受保护的url流式播放一部电影。我可以下载电影然后播放，但是电影太长了，所以这很烦人。

下面是我的代码：

-(MPMoviePlayerController *)moviePlayerController
{
 NSURL *url = [NSURL URLWithString:@"http://ABcDE.com/secret/Movie.mov"];
 _moviePlayer =  [[MPMoviePlayerController alloc] initWithContentURL:url];
NSURLCredential *credential = [[NSURLCredential alloc]
                               initWithUser: @"user"
                               password: @"password"
                               persistence: NSURLCredentialPersistencePermanent];

NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]
                                         initWithHost: [url host]
                                         port: 80
                                         protocol: [url scheme]
                                         realm: [url host]
                                         authenticationMethod: NSURLAuthenticationMethodDefault];
[[NSURLCredentialStorage sharedCredentialStorage]
 setDefaultCredential: credential
 forProtectionSpace: protectionSpace];

_moviePlayer.view.frame = CGRectMake(0, 0, 500, 500);

_moviePlayer.controlStyle = MPMovieControlStyleDefault;
_moviePlayer.shouldAutoplay = YES;
_moviePlayer.backgroundView.backgroundColor = [UIColor blackColor];
_moviePlayer.allowsAirPlay = YES;
_moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;
return _moviePlayer;
}

我试着把这个领域链接到零，但没有成功。之后我尝试移动initWitcontnetURL

   [[NSURLCredentialStorage sharedCredentialStorage] setDefaultCredential: credential forProtectionSpace: protectionSpace];           

这也不管用。

从方法-(空)代码中，我得到了错误代码Domain=MediaPlayerDomain =-1013“无法完成操作。(MediaPlayerErrorDomain错误-1013。)”

查看apple文档，这是一个CFNetwork错误kCFURLErrorUserAuthenticationRequired = -1013

有什么办法解决这个问题吗？

Answer 1

我无法让MPMoviePlayerController正确地完成身份验证挑战，即使苹果公司的文档中有不同的说法。我想出了一个非常老套的解决方案，就是使用苹果的CustomHTTPProtocol拦截响应，并提供身份验证质询响应。我相信这个协议的最初目的是处理UIWebViews的身份验证。

链接到CustomHTTPProtocol：https://developer.apple.com/library/ios/samplecode/CustomHTTPProtocol/Listings/Read_Me_About_CustomHTTPProtocol_txt.html

我的接口声明：

@interface SampleViewController() <CustomHTTPProtocolDelegate>

在我的SampleViewController中实例化MPMoviePlayerController

NSString *fullURLString = @"http://www.samplesite.com/samplemovie.mp4";
NSURL *fullURL = [NSURL URLWithString:fullURLString];

[CustomHTTPProtocol setDelegate:self];
[CustomHTTPProtocol start];

NSURLCredential *credential = [[NSURLCredential alloc]
                              initWithUser:@"username"
                              password:@"password"
                              persistence:NSURLCredentialPersistenceForSession];
NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]
                                        initWithHost:fullURL.host
                                        port:80
                                        protocol:fullURL.scheme
                                        realm:nil
                                        authenticationMethod:NSURLAuthenticationMethodDefault];
[[NSURLCredentialStorage sharedCredentialStorage] setDefaultCredential:credential forProtectionSpace:protectionSpace];

self.moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:fullURL];
[self.moviePlayer prepareToPlay];
[self.moviePlayer setShouldAutoplay:NO];
[self.moviePlayer setControlStyle:MPMovieControlStyleEmbedded];
[self.moviePlayer.view setFrame:self.sampleView.bounds];
[self.moviePlayer.backgroundView setBackgroundColor:[UIColor colorWithWhite:0.9 alpha:1.0]];
[self.moviePlayer.view setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
[self.sampleView addSubview:self.moviePlayer.view];

同样在我的SampleViewController中，我有几个委托方法。对于基本身份验证，它非常简单：

- (BOOL)customHTTPProtocol:(CustomHTTPProtocol *)protocol canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace
{
    BOOL canAuth = ([[protectionSpace authenticationMethod] isEqual:NSURLAuthenticationMethodHTTPBasic] &&
                    [[protectionSpace realm] isEqualToString:<your realm>]);
    return canAuth;
}

- (void)customHTTPProtocol:(CustomHTTPProtocol *)protocol didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
    NSURLCredential *newCredential = [NSURLCredential credentialWithUser:<username>
                                               password:<password>
                                            persistence:NSURLCredentialPersistenceForSession];
    [[challenge sender] useCredential:newCredential forAuthenticationChallenge:challenge];
}

在调用start之后，所有的http和https请求都会经过CustomHTTPProtocol模块

我没有包括CustomHTTPProtocol，因为苹果提供了源代码，而且它真的很长。我做了一些修改，使其与ARC工作，但它大部分是相同的代码。

希望这对你有用。

Answer 2

如果您的视频服务器需要基本身份验证，则可以轻松地将其传递到电影播放器控制器的URL，例如，您将以以下格式传递url，而不是常规的url：

http(s)://user:password@host/path

然后将播放视频。