react-native/Libraries/Network/RCTReachability.m

93 lines
2.7 KiB
Objective-C

/**
* Copyright (c) 2015-present, 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.
*/
#import "RCTReachability.h"
#import "RCTBridge.h"
#import "RCTEventDispatcher.h"
static NSString *const RCTReachabilityStateUnknown = @"unknown";
static NSString *const RCTReachabilityStateNone = @"none";
static NSString *const RCTReachabilityStateWifi = @"wifi";
static NSString *const RCTReachabilityStateCell = @"cell";
@implementation RCTReachability
{
SCNetworkReachabilityRef _reachability;
NSString *_status;
}
@synthesize bridge = _bridge;
RCT_EXPORT_MODULE()
static void RCTReachabilityCallback(__unused SCNetworkReachabilityRef target, SCNetworkReachabilityFlags flags, void *info)
{
RCTReachability *self = (__bridge id)info;
NSString *status = RCTReachabilityStateUnknown;
if ((flags & kSCNetworkReachabilityFlagsReachable) == 0 ||
(flags & kSCNetworkReachabilityFlagsConnectionRequired) != 0) {
status = RCTReachabilityStateNone;
}
#if TARGET_OS_IPHONE
else if ((flags & kSCNetworkReachabilityFlagsIsWWAN) != 0) {
status = RCTReachabilityStateCell;
}
#endif
else {
status = RCTReachabilityStateWifi;
}
if (![status isEqualToString:self->_status]) {
self->_status = status;
[self->_bridge.eventDispatcher sendDeviceEventWithName:@"reachabilityDidChange"
body:@{@"network_reachability": status}];
}
}
#pragma mark - Lifecycle
- (instancetype)initWithHost:(NSString *)host
{
if ((self = [super init])) {
_status = RCTReachabilityStateUnknown;
_reachability = SCNetworkReachabilityCreateWithName(kCFAllocatorDefault, [host UTF8String]);
SCNetworkReachabilityContext context = { 0, ( __bridge void *)self, NULL, NULL, NULL };
SCNetworkReachabilitySetCallback(_reachability, RCTReachabilityCallback, &context);
SCNetworkReachabilityScheduleWithRunLoop(_reachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
}
return self;
}
- (instancetype)init
{
return [self initWithHost:@"apple.com"];
}
- (void)dealloc
{
SCNetworkReachabilityUnscheduleFromRunLoop(_reachability, CFRunLoopGetMain(), kCFRunLoopCommonModes);
CFRelease(_reachability);
}
#pragma mark - Public API
// TODO: remove error callback - not needed except by Subscribable interface
RCT_EXPORT_METHOD(getCurrentReachability:(RCTResponseSenderBlock)getSuccess
withErrorCallback:(__unused RCTResponseSenderBlock)getError)
{
getSuccess(@[@{@"network_reachability": _status}]);
}
@end