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Conrad Kramer
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Jun 30, 2016
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,184 @@ | ||
| /* | ||
| * Copyright (c) 2014, Facebook, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. An additional grant | ||
| * of patent rights can be found in the PATENTS file in the same directory. | ||
| * | ||
| */ | ||
|
|
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| #import <UIKit/UIKit.h> | ||
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| #import "BFAppLinkResolving.h" | ||
| #import "BFAppLinkResolvingPrivate.h" | ||
| #import "BFAppLink.h" | ||
| #import "BFAppLinkTarget.h" | ||
| #import "BFTask.h" | ||
| #import "BFTaskCompletionSource.h" | ||
|
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| NSString *const BFAppLinkResolverPreferHeader = @"Prefer-Html-Meta-Tags"; | ||
| NSString *const BFAppLinkResolverMetaTagPrefix = @"al"; | ||
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| NSString *const BFAppLinkResolverRedirectDataKey = @"data"; | ||
| NSString *const BFAppLinkResolverRedirectResponseKey = @"response"; | ||
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| static NSString *const BFAppLinkResolverIOSURLKey = @"url"; | ||
| static NSString *const BFAppLinkResolverIOSAppStoreIdKey = @"app_store_id"; | ||
| static NSString *const BFAppLinkResolverIOSAppNameKey = @"app_name"; | ||
| static NSString *const BFAppLinkResolverDictionaryValueKey = @"_value"; | ||
| static NSString *const BFAppLinkResolverWebKey = @"web"; | ||
| static NSString *const BFAppLinkResolverIOSKey = @"ios"; | ||
| static NSString *const BFAppLinkResolverIPhoneKey = @"iphone"; | ||
| static NSString *const BFAppLinkResolverIPadKey = @"ipad"; | ||
| static NSString *const BFAppLinkResolverWebURLKey = @"url"; | ||
| static NSString *const BFAppLinkResolverShouldFallbackKey = @"should_fallback"; | ||
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| NSDictionary *BFAppLinkResolverParseALData(NSArray *dataArray) { | ||
| NSMutableDictionary *al = [NSMutableDictionary dictionary]; | ||
| for (NSDictionary *tag in dataArray) { | ||
| NSString *name = tag[@"property"]; | ||
| if (![name isKindOfClass:[NSString class]]) { | ||
| continue; | ||
| } | ||
| NSArray *nameComponents = [name componentsSeparatedByString:@":"]; | ||
| if (![nameComponents[0] isEqualToString:BFAppLinkResolverMetaTagPrefix]) { | ||
| continue; | ||
| } | ||
| NSMutableDictionary *root = al; | ||
| for (int i = 1; i < nameComponents.count; i++) { | ||
| NSMutableArray *children = root[nameComponents[i]]; | ||
| if (!children) { | ||
| children = [NSMutableArray array]; | ||
| root[nameComponents[i]] = children; | ||
| } | ||
| NSMutableDictionary *child = children.lastObject; | ||
| if (!child || i == nameComponents.count - 1) { | ||
| child = [NSMutableDictionary dictionary]; | ||
| [children addObject:child]; | ||
| } | ||
| root = child; | ||
| } | ||
| if (tag[@"content"]) { | ||
| root[BFAppLinkResolverDictionaryValueKey] = tag[@"content"]; | ||
| } | ||
| } | ||
| return al; | ||
| } | ||
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| BFAppLink *BFAppLinkResolverAppLinkFromALData(NSDictionary *appLinkDict, NSURL *destination) { | ||
| NSMutableArray *linkTargets = [NSMutableArray array]; | ||
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| NSArray *platformData = nil; | ||
| switch (UI_USER_INTERFACE_IDIOM()) { | ||
| case UIUserInterfaceIdiomPad: | ||
| platformData = @[ appLinkDict[BFAppLinkResolverIPadKey] ?: @{}, | ||
| appLinkDict[BFAppLinkResolverIOSKey] ?: @{} ]; | ||
| break; | ||
| case UIUserInterfaceIdiomPhone: | ||
| platformData = @[ appLinkDict[BFAppLinkResolverIPhoneKey] ?: @{}, | ||
| appLinkDict[BFAppLinkResolverIOSKey] ?: @{} ]; | ||
| break; | ||
| #ifdef __TVOS_9_0 | ||
| case UIUserInterfaceIdiomTV: | ||
| #endif | ||
| #ifdef __IPHONE_9_3 | ||
| case UIUserInterfaceIdiomCarPlay: | ||
| #endif | ||
| case UIUserInterfaceIdiomUnspecified: | ||
| default: | ||
| // Future-proofing. Other User Interface idioms should only hit ios. | ||
| platformData = @[ appLinkDict[BFAppLinkResolverIOSKey] ?: @{} ]; | ||
| break; | ||
| } | ||
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| for (NSArray *platformObjects in platformData) { | ||
| for (NSDictionary *platformDict in platformObjects) { | ||
| // The schema requires a single url/app store id/app name, | ||
| // but we could find multiple of them. We'll make a best effort | ||
| // to interpret this data. | ||
| NSArray *urls = platformDict[BFAppLinkResolverIOSURLKey]; | ||
| NSArray *appStoreIds = platformDict[BFAppLinkResolverIOSAppStoreIdKey]; | ||
| NSArray *appNames = platformDict[BFAppLinkResolverIOSAppNameKey]; | ||
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| NSUInteger maxCount = MAX(urls.count, MAX(appStoreIds.count, appNames.count)); | ||
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| for (NSUInteger i = 0; i < maxCount; i++) { | ||
| NSString *urlString = urls[i][BFAppLinkResolverDictionaryValueKey]; | ||
| NSURL *url = urlString ? [NSURL URLWithString:urlString] : nil; | ||
| NSString *appStoreId = appStoreIds[i][BFAppLinkResolverDictionaryValueKey]; | ||
| NSString *appName = appNames[i][BFAppLinkResolverDictionaryValueKey]; | ||
| BFAppLinkTarget *target = [BFAppLinkTarget appLinkTargetWithURL:url | ||
| appStoreId:appStoreId | ||
| appName:appName]; | ||
| [linkTargets addObject:target]; | ||
| } | ||
| } | ||
| } | ||
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| NSDictionary *webDict = appLinkDict[BFAppLinkResolverWebKey][0]; | ||
| NSString *webUrlString = webDict[BFAppLinkResolverWebURLKey][0][BFAppLinkResolverDictionaryValueKey]; | ||
| NSString *shouldFallbackString = webDict[BFAppLinkResolverShouldFallbackKey][0][BFAppLinkResolverDictionaryValueKey]; | ||
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| NSURL *webUrl = destination; | ||
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| if (shouldFallbackString && | ||
| [@[ @"no", @"false", @"0" ] containsObject:[shouldFallbackString lowercaseString]]) { | ||
| webUrl = nil; | ||
| } | ||
| if (webUrl && webUrlString) { | ||
| webUrl = [NSURL URLWithString:webUrlString]; | ||
| } | ||
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| return [BFAppLink appLinkWithSourceURL:destination | ||
| targets:linkTargets | ||
| webURL:webUrl]; | ||
| } | ||
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| BFTask *BFFollowRedirects(NSURL *url) { | ||
| // This task will be resolved with either the redirect NSURL | ||
| // or a dictionary with the response data to be returned. | ||
| BFTaskCompletionSource *tcs = [BFTaskCompletionSource taskCompletionSource]; | ||
| NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; | ||
| [request setValue:BFAppLinkResolverMetaTagPrefix forHTTPHeaderField:BFAppLinkResolverPreferHeader]; | ||
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| void (^completion)(NSURLResponse *response, NSData *data, NSError *error) = ^(NSURLResponse *response, NSData *data, NSError *error) { | ||
| if (error) { | ||
| [tcs setError:error]; | ||
| return; | ||
| } | ||
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| if ([response isKindOfClass:[NSHTTPURLResponse class]]) { | ||
| NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response; | ||
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| // NSURLConnection usually follows redirects automatically, but the | ||
| // documentation is unclear what the default is. This helps it along. | ||
| if (httpResponse.statusCode >= 300 && httpResponse.statusCode < 400) { | ||
| NSString *redirectString = httpResponse.allHeaderFields[@"Location"]; | ||
| NSURL *redirectURL = [NSURL URLWithString:redirectString]; | ||
| [tcs setResult:redirectURL]; | ||
| return; | ||
| } | ||
| } | ||
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| [tcs setResult:@{ BFAppLinkResolverRedirectResponseKey : response, BFAppLinkResolverRedirectDataKey : data }]; | ||
| }; | ||
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| #if __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_7_0 || __MAC_OS_X_VERSION_MIN_REQUIRED >= __MAC_10_9 | ||
| NSURLSession *session = [NSURLSession sharedSession]; | ||
| [[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { | ||
| completion(response, data, error); | ||
| }] resume]; | ||
| #else | ||
| [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:completion]; | ||
| #endif | ||
|
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| return [tcs.task continueWithSuccessBlock:^id(BFTask *task) { | ||
| // If we redirected, just keep recursing. | ||
| if ([task.result isKindOfClass:[NSURL class]]) { | ||
| return BFFollowRedirects(task.result); | ||
| } | ||
| return task; | ||
| }]; | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /* | ||
| * Copyright (c) 2014, Facebook, Inc. | ||
| * All rights reserved. | ||
| * | ||
| * This source code is licensed under the BSD-style license found in the | ||
| * LICENSE file in the root directory of this source tree. An additional grant | ||
| * of patent rights can be found in the PATENTS file in the same directory. | ||
| * | ||
| */ | ||
|
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| @class BFAppLink; | ||
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| /* | ||
| Builds up a data structure filled with the app link data from the meta tags on a page. | ||
| The structure of this object is a dictionary where each key holds an array of app link | ||
| data dictionaries. Values are stored in a key called "_value". | ||
| */ | ||
| extern NSDictionary *BFAppLinkResolverParseALData(NSArray *dataArray); | ||
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| /* | ||
| Converts app link data into a BFAppLink containing the targets relevant for this platform. | ||
| */ | ||
| extern BFAppLink *BFAppLinkResolverAppLinkFromALData(NSDictionary *appLinkDict, NSURL *destination); | ||
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| /* | ||
| The returned task will be resolved with a dictionary containing the response data | ||
| */ | ||
| extern BFTask *BFFollowRedirects(NSURL *url); | ||
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| extern NSString *const BFAppLinkResolverPreferHeader; | ||
| extern NSString *const BFAppLinkResolverMetaTagPrefix; | ||
|
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| extern NSString *const BFAppLinkResolverRedirectDataKey; | ||
| extern NSString *const BFAppLinkResolverRedirectResponseKey; |
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