如何将标题信息插入MPMoviePlayerController url? [英] How to insert header info into MPMoviePlayerController url?
问题描述
我需要使用http协议实现视频流服务. 我知道如何将URL设置为MPMoviePlayerController，如何将headerField设置为NSMutableURLRequest，但是我不知道如何将它们组合在一起. 我实现了以下代码，但是无法正常工作，并且我认为是因为二进制数据中没有文件信息.
I need to implement video streaming service with http protocol. I know how to set url into MPMoviePlayerController, and how to set headerField into NSMutableURLRequest, but I have no idea how to combine them. I implement like below code, but not working, and I assume because there is no file info in the binary data.
- (void) openUrl
{
NSMutableURLRequest *reqURL = [NSMutableURLRequest requestWithURL:
[NSURL URLWithString:@"http://111.222.33.44/MOV/2013/4/123123123"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];
[reqURL setHTTPMethod:@"GET"];
[reqURL setValue:@"Mozilla/4.0 (compatible;)" forHTTPHeaderField:@"User-Agent"];
[reqURL setValue:@"AAA-bb" forHTTPHeaderField:@"Auth-Token"];
[reqURL setValue:@"bytes=0-1024" forHTTPHeaderField:@"Range"];
[reqURL setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[NSURLConnection connectionWithRequest:reqURL delegate:self];
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(@"Received");
NSError * jsonERR = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"myMove.ts"];
[data writeToFile:path atomically:YES];
NSLog(@"copied");
NSURL *moveUrl = [NSURL fileURLWithPath:path];
MPMoviePlayerController *player = [[MPMoviePlayerController alloc]init];
[player setContentURL:moveUrl];
player.view.frame = self.view.bounds;
player.controlStyle = MPMovieControlStyleEmbedded;
[self.view addSubview:player.view];
[player play];
}
我确认委托方法中有数据，但我不知道如何播放. 请有人让我知道怎么玩. Auth-Token和Range是必需的参数.
I confirmed there is data in the delegate method, but I don't know how to play it. Please somebody let me know how to play it. Auth-Token and Range are necessary parameters.
谢谢.
推荐答案
的确，Apple并未提供将标头注入MPMoviePlayerController请求的简便方法.稍作努力，您就可以使用自定义
It's true that Apple doesn't expose an easy way to inject headers into a MPMoviePlayerController's request. With a bit of effort, you can get this done using a custom NSURLProtocol. So, let's do it!
MyCustomURLProtocol.h:
MyCustomURLProtocol.h:
@interface MyCustomURLProtocol : NSURLProtocol <NSURLConnectionDelegate, NSURLConnectionDataDelegate>
@property (nonatomic, strong) NSURLConnection* connection;
@end
MyCustomURLProtocol.m:
MyCustomURLProtocol.m:
@implementation MyCustomURLProtocol
// Define which protocols you want to handle
// In this case, I'm only handling "customProtocol" manually
// Everything else, (http, https, ftp, etc) is handled by the system
+ (BOOL) canInitWithRequest:(NSURLRequest *)request {
NSURL* theURL = request.URL;
NSString* scheme = theURL.scheme;
if([scheme isEqualToString:@"customProtocol"]) {
return YES;
}
return NO;
}
// You could modify the request here, but I'm doing my legwork in startLoading
+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request {
return request;
}
// I'm not doing any custom cache work
+ (BOOL) requestIsCacheEquivalent:(NSURLRequest *)a toRequest:(NSURLRequest *)b {
return [super requestIsCacheEquivalent:a toRequest:b];
}
// This is where I inject my header
// I take the handled request, add a header, and turn it back into http
// Then I fire it off
- (void) startLoading {
NSMutableURLRequest* mutableRequest = [self.request mutableCopy];
[mutableRequest setValue:@"customHeaderValue" forHTTPHeaderField:@"customHeaderField"];
NSURL* newUrl = [[NSURL alloc] initWithScheme:@"http" host:[mutableRequest.URL host] path:[mutableRequest.URL path]];
[mutableRequest setURL:newUrl];
self.connection = [NSURLConnection connectionWithRequest:mutableRequest delegate:self];
}
- (void) stopLoading {
[self.connection cancel];
}
// Below are boilerplate delegate implementations
// They are responsible for letting our client (the MPMovePlayerController) what happened
- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[self.client URLProtocol:self didFailWithError:error];
self.connection = nil;
}
- (void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[self.client URLProtocol:self didLoadData:data];
}
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageAllowed];
}
- (void) connectionDidFinishLoading:(NSURLConnection *)connection {
[self.client URLProtocolDidFinishLoading:self];
self.connection = nil;
}
@end
在使用自定义URL协议之前，必须先注册它.在您的AppDelegate.m中:
Before you can use your custom URL Protocol, you must register it. In your AppDelegate.m:
#import "MyCustomURLProtocol.h"
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// ... Your normal setup ...
[NSURLProtocol registerClass:[MyCustomURLProtocol class]];
return YES;
}
最后，您需要使用MPMediaPlayerController来使用自定义URL协议.
Finally, you need to user your custom URL Protocol with the MPMediaPlayerController.
NSString* theURLString = [NSString stringWithFormat:@"customProtocol://%@%@", [_url host],[_url path]];
_player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:theURLString]];
MPMoviePlayerController现在将尝试使用customProtocol://而不是普通的http://发出请求.使用此设置，我们然后拦截该请求，添加标头，将其转换为http，然后关闭所有内容.
The MPMoviePlayerController will now attempt to make the request with customProtocol:// instead of normal http://. Using this setup, we then intercept that request, add our headers, turn it into http, and then fire everything off.
这篇关于如何将标题信息插入MPMoviePlayerController url?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
