NSURLProtocol - 未调用 startLoading

NSURLProtocol - startLoading not invoked

自从升级到 iOS 9.1,我的自定义 NSURLProtocol,将不再调用 -(void)startLoading。有没有其他人遇到过这种情况?

在 iOS 8 ...

上一切正常

代码:

@implementation RZCustomProtocol
@dynamic request;

+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
    if ([request.URL.scheme isEqualToString:@"imsweb"]) {
        NSLog(@"%@", @"YES");
        return YES;
    }
    return NO;
}

+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request {
    return request;
}

+ (BOOL)requestIsCacheEquivalent:(NSURLRequest *)a toRequest:(NSURLRequest *)b {
    return [super requestIsCacheEquivalent:a toRequest:b];
}

- (void)startLoading {
    NSLog(@"STARTLOADING: %@", [self.request.URL absoluteString]);
    NSString *filename = [[self.request.URL lastPathComponent] stringByDeletingPathExtension];
    NSLog(@"%@", filename);
    NSString *videoUrl = [[NSBundle mainBundle] pathForResource:filename ofType:@"mp4"];
    NSData *video = [NSData dataWithContentsOfFile:videoUrl];
    NSLog(@"%lu", (unsigned long)video.length);
    NSHTTPURLResponse *response = [[NSHTTPURLResponse alloc] initWithURL:self.request.URL
                                                              statusCode:200 HTTPVersion:nil headerFields:@{
                                                                                                            @"Content-Length": [NSString stringWithFormat:@"%lu", (unsigned long)video.length],
                                                                                                            @"Content-Type": @"video/mp4",
                                                                                                            }];

    [self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
    [self.client URLProtocol:self didLoadData:video];
    [self.client URLProtocolDidFinishLoading:self];
}

- (void)stopLoading {
    NSLog(@"STOPLOADING: %@", [self.request.URL absoluteString]);
}

我遇到了同样的问题。在我的例子中,我使用 JavaScript 向页面动态添加了一个 iframe,并在其中加载了我的自定义协议内容。在 iOS 9.1 中,当通过 https 访问主文档时,WebView 拒绝加载 iframe 内容,但它在 http 上工作正常。这看起来像一个新的安全控制,以避免在安全会话中加载不安全的资源。

我采用的修复方法是更改​​我的方案以使用 https。例如,使用 https://imsweb/... 而不是 imsweb://。这有点麻烦,但这是我能找到的最佳解决方案。

类似于:

+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
    if ([request.URL.scheme isEqualToString:@"https"] &&
            [request.URL.host isEqualToString:@"imsweb"]) {
        NSLog(@"%@", @"YES");
        return YES;
    }
    return NO;
}

当然你需要在startLoading中重建正确的URL。