Allow video uploads

Summary: Allows video uploads from native iOS by using the proper network handler, `RCTAssetsLibrary` rather than `RCTImageLoader`. Currently, uploading a camera roll video via its `assets-library://` URI would upload the first image frame. This fixes it by checking if the `assets-library://` URI is of the extension `MOV`, and if so, declines to process it from `RCTImageLoader`.

Reviewed By: javache

Differential Revision: D5223351

fbshipit-source-id: 8de92c5bb72acb02ed4d9fb92d69f68c8b5d1b36

Libraries/Image/RCTImageLoader.m

@@ -735,6 +735,30 @@ static UIImage *RCTResizeImageIfNeeded(UIImage *image,
 - (BOOL)canHandleRequest:(NSURLRequest *)request
 {
     NSURL *requestURL = request.URL;
+
+    // If the data being loaded is a video, return NO
+    // Even better may be to implement this on the RCTImageURLLoader that would try to load it,
+    // but we'd have to run the logic both in RCTPhotoLibraryImageLoader and
+    // RCTAssetsLibraryRequestHandler. Once we drop iOS7 though, we'd drop
+    // RCTAssetsLibraryRequestHandler and can move it there.
+    static NSRegularExpression *videoRegex = nil;
+    if (!videoRegex) {
+      NSError *error = nil;
+      videoRegex = [NSRegularExpression regularExpressionWithPattern:@"(?:&|^)ext=MOV(?:&|$)"
+                                                             options:NSRegularExpressionCaseInsensitive
+                                                               error:&error];
+      if (error) {
+        RCTLogError(@"%@", error);
+      }
+    }
+
+    NSString *query = requestURL.query;
+    if (query != nil && [videoRegex firstMatchInString:query
+                                               options:0
+                                                 range:NSMakeRange(0, query.length)]) {
+      return NO;
+    }
+
     for (id<RCTImageURLLoader> loader in _loaders) {
         // Don't use RCTImageURLLoader protocol for modules that already conform to
         // RCTURLRequestHandler as it's inefficient to decode an image and then