react-native/Libraries/WebSocket/RCTWebSocketExecutor.m

226 lines
6.1 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 "RCTDefines.h"
#if RCT_DEV // Debug executors are only supported in dev mode
#import "RCTWebSocketExecutor.h"
#import "RCTConvert.h"
#import "RCTLog.h"
#import "RCTSparseArray.h"
#import "RCTUtils.h"
#import "RCTSRWebSocket.h"
typedef void (^RCTWSMessageCallback)(NSError *error, NSDictionary *reply);
@interface RCTWebSocketExecutor () <RCTSRWebSocketDelegate>
@end
@implementation RCTWebSocketExecutor
{
RCTSRWebSocket *_socket;
dispatch_queue_t _jsQueue;
RCTSparseArray *_callbacks;
dispatch_semaphore_t _socketOpenSemaphore;
NSMutableDictionary *_injectedObjects;
NSURL *_url;
}
RCT_EXPORT_MODULE()
- (instancetype)init
{
return [self initWithURL:[RCTConvert NSURL:@"http://localhost:8081/debugger-proxy"]];
}
- (instancetype)initWithURL:(NSURL *)URL
{
RCTAssertParam(URL);
if ((self = [super init])) {
_url = URL;
}
return self;
}
- (void)setUp
{
_jsQueue = dispatch_queue_create("com.facebook.React.WebSocketExecutor", DISPATCH_QUEUE_SERIAL);
_socket = [[RCTSRWebSocket alloc] initWithURL:_url];
_socket.delegate = self;
_callbacks = [RCTSparseArray new];
_injectedObjects = [NSMutableDictionary new];
[_socket setDelegateDispatchQueue:_jsQueue];
NSURL *startDevToolsURL = [NSURL URLWithString:@"/launch-chrome-devtools" relativeToURL:_url];
[NSURLConnection connectionWithRequest:[NSURLRequest requestWithURL:startDevToolsURL] delegate:nil];
if (![self connectToProxy]) {
RCTLogError(@"Connection to %@ timed out. Are you running node proxy? If \
you are running on the device, check if you have the right IP \
address in `RCTWebSocketExecutor.m`.", _url);
[self invalidate];
return;
}
NSInteger retries = 3;
BOOL runtimeIsReady = [self prepareJSRuntime];
while (!runtimeIsReady && retries > 0) {
runtimeIsReady = [self prepareJSRuntime];
retries--;
}
if (!runtimeIsReady) {
RCTLogError(@"Runtime is not ready. Make sure Chrome is running and not "
"paused on a breakpoint or exception and try reloading again.");
[self invalidate];
return;
}
}
- (BOOL)connectToProxy
{
_socketOpenSemaphore = dispatch_semaphore_create(0);
[_socket open];
long connected = dispatch_semaphore_wait(_socketOpenSemaphore, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 2));
return connected == 0;
}
- (BOOL)prepareJSRuntime
{
__block NSError *initError;
dispatch_semaphore_t s = dispatch_semaphore_create(0);
[self sendMessage:@{@"method": @"prepareJSRuntime"} waitForReply:^(NSError *error, NSDictionary *reply) {
initError = error;
dispatch_semaphore_signal(s);
}];
long runtimeIsReady = dispatch_semaphore_wait(s, dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC));
return runtimeIsReady == 0 && initError == nil;
}
- (void)webSocket:(RCTSRWebSocket *)webSocket didReceiveMessage:(id)message
{
NSError *error = nil;
NSDictionary *reply = RCTJSONParse(message, &error);
NSNumber *messageID = reply[@"replyID"];
RCTWSMessageCallback callback = _callbacks[messageID];
if (callback) {
callback(error, reply);
}
}
- (void)webSocketDidOpen:(RCTSRWebSocket *)webSocket
{
dispatch_semaphore_signal(_socketOpenSemaphore);
}
- (void)webSocket:(RCTSRWebSocket *)webSocket didFailWithError:(NSError *)error
{
RCTLogError(@"WebSocket connection failed with error %@", error);
}
- (void)sendMessage:(NSDictionary *)message waitForReply:(RCTWSMessageCallback)callback
{
static NSUInteger lastID = 10000;
dispatch_async(_jsQueue, ^{
if (!self.valid) {
NSError *error = [NSError errorWithDomain:@"WS" code:1 userInfo:@{
NSLocalizedDescriptionKey: @"socket closed"
}];
callback(error, nil);
return;
}
NSNumber *expectedID = @(lastID++);
_callbacks[expectedID] = [callback copy];
NSMutableDictionary *messageWithID = [message mutableCopy];
messageWithID[@"id"] = expectedID;
[_socket send:RCTJSONStringify(messageWithID, NULL)];
});
}
- (void)executeApplicationScript:(NSData *)script sourceURL:(NSURL *)URL onComplete:(RCTJavaScriptCompleteBlock)onComplete
{
NSDictionary *message = @{
@"method": @"executeApplicationScript",
@"url": RCTNullIfNil(URL.absoluteString),
@"inject": _injectedObjects,
};
[self sendMessage:message waitForReply:^(NSError *error, NSDictionary *reply) {
onComplete(error);
}];
}
- (void)executeJSCall:(NSString *)name method:(NSString *)method arguments:(NSArray *)arguments callback:(RCTJavaScriptCallback)onComplete
{
RCTAssert(onComplete != nil, @"callback was missing for exec JS call");
NSDictionary *message = @{
@"method": @"executeJSCall",
@"moduleName": name,
@"moduleMethod": method,
@"arguments": arguments
};
[self sendMessage:message waitForReply:^(NSError *socketError, NSDictionary *reply) {
if (socketError) {
onComplete(nil, socketError);
return;
}
NSString *result = reply[@"result"];
id objcValue = RCTJSONParse(result, NULL);
onComplete(objcValue, nil);
}];
}
- (void)injectJSONText:(NSString *)script asGlobalObjectNamed:(NSString *)objectName callback:(RCTJavaScriptCompleteBlock)onComplete
{
dispatch_async(_jsQueue, ^{
_injectedObjects[objectName] = script;
onComplete(nil);
});
}
- (void)executeBlockOnJavaScriptQueue:(dispatch_block_t)block
{
if ([NSThread isMainThread]) {
block();
} else {
dispatch_async(dispatch_get_main_queue(), block);
}
}
- (void)executeAsyncBlockOnJavaScriptQueue:(dispatch_block_t)block
{
dispatch_async(dispatch_get_main_queue(), block);
}
- (void)invalidate
{
_socket.delegate = nil;
[_socket closeWithCode:1000 reason:@"Invalidated"];
_socket = nil;
}
- (BOOL)isValid
{
return _socket != nil && _socket.readyState == RCTSR_OPEN;
}
- (void)dealloc
{
RCTAssert(!self.valid, @"-invalidate must be called before -dealloc");
}
@end
#endif