correctly sets YouTube consent cookie

Author: alexeichhorn

XCDYouTubeKit/XCDYouTubeVideoOperation.m

@@ -270,10 +270,49 @@ - (void) handleConnectionError:(NSError *)connectionError requestType:(XCDYouTub
 
 #pragma mark - Response Parsing
 
+- (void) initializeConsentWithResponse:(NSURLResponse *)response {
+	NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
+	if (httpResponse && response.URL) {
+		NSArray <NSHTTPCookie *> *cookies = [NSHTTPCookie cookiesWithResponseHeaderFields:httpResponse.allHeaderFields forURL:(NSURL *_Nonnull)response.URL];
+		
+		for (NSHTTPCookie *cookie in cookies) {
+			if ([cookie.name isEqualToString:@"__Secure-3PSID"]) return;
+		}
+		
+		for (NSHTTPCookie *cookie in cookies) {
+			if ([cookie.name isEqualToString:@"CONSENT"]) {
+				if ([cookie.value isEqualToString:@"YES"]) return;
+				
+				NSString *rawConsentID = [cookie.value stringByReplacingOccurrencesOfString:@"PENDING+" withString:@""];
+				int consentID = [rawConsentID intValue];
+				
+				// generate random consent id, if doesn't match expected format
+				if (consentID < 100 || consentID > 999) {
+					consentID = 100 + (int)arc4random_uniform((uint32_t)(999 - 100 + 1));
+				}
+				
+				NSString *cookieValue = [[NSString alloc] initWithFormat:@"YES+cb.20210328-17-p0.en+FX+%i", consentID];
+				NSHTTPCookie *consentCookie = [NSHTTPCookie cookieWithProperties:@{
+														NSHTTPCookiePath: @"/",
+														NSHTTPCookieName: @"CONSENT",
+														NSHTTPCookieValue: cookieValue,
+														NSHTTPCookieDomain:@".youtube.com",
+														NSHTTPCookieSecure:@"TRUE"
+				}];
+				[self.session.configuration.HTTPCookieStorage setCookie:consentCookie];
+				return;
+			}
+		}
+		
+	}
+}
+
 - (void) handleVideoInfoResponseWithInfo:(NSDictionary *)info response:(NSURLResponse *)response
 {
 	XCDYouTubeLogDebug(@"Handling video info response");
 
+	[self initializeConsentWithResponse:response];
+	
 	NSError *error = nil;
 	XCDYouTubeVideo *video = [[XCDYouTubeVideo alloc] initWithIdentifier:self.videoIdentifier info:info playerScript:self.playerScript response:response error:&error];
 	if (video)