react-native/React/DevSupport/RCTPackagerConnection.m

139 lines
4.0 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 "RCTPackagerConnection.h"
#import <objc/runtime.h>
#import <React/RCTAssert.h>
#import <React/RCTBridge.h>
#import <React/RCTConvert.h>
#import <React/RCTDefines.h>
#import <React/RCTLog.h>
#import <React/RCTReconnectingWebSocket.h>
#import <React/RCTSRWebSocket.h>
#import <React/RCTUtils.h>
#import <React/RCTWebSocketObserverProtocol.h>
#import "RCTPackagerConnectionBridgeConfig.h"
#import "RCTReloadPackagerMethod.h"
#import "RCTSamplingProfilerPackagerMethod.h"
#if RCT_DEV
@interface RCTPackagerConnection () <RCTWebSocketProtocolDelegate>
@end
@implementation RCTPackagerConnection {
NSURL *_packagerURL;
RCTReconnectingWebSocket *_socket;
NSMutableDictionary<NSString *, id<RCTPackagerClientMethod>> *_handlers;
}
+ (instancetype)connectionForBridge:(RCTBridge *)bridge
{
RCTPackagerConnectionBridgeConfig *config = [[RCTPackagerConnectionBridgeConfig alloc] initWithBridge:bridge];
return [[[self class] alloc] initWithConfig:config];
}
- (instancetype)initWithConfig:(id<RCTPackagerConnectionConfig>)config
{
if (self = [super init]) {
_packagerURL = [config packagerURL];
_handlers = [[config defaultPackagerMethods] mutableCopy];
[self connect];
}
return self;
}
- (void)connect
{
RCTAssertMainQueue();
NSURL *url = _packagerURL;
if (!url) {
return;
}
// The jsPackagerClient is a static map that holds different packager clients per the packagerURL
// In case many instances of DevMenu are created, the latest instance that use the same URL as
// previous instances will override given packager client's method handlers
static NSMutableDictionary<NSString *, RCTReconnectingWebSocket *> *socketConnections = nil;
if (socketConnections == nil) {
socketConnections = [NSMutableDictionary new];
}
NSString *key = [url absoluteString];
RCTReconnectingWebSocket *webSocket = socketConnections[key];
if (!webSocket) {
webSocket = [[RCTReconnectingWebSocket alloc] initWithURL:url];
[webSocket start];
socketConnections[key] = webSocket;
}
webSocket.delegate = self;
}
- (void)addHandler:(id<RCTPackagerClientMethod>)handler forMethod:(NSString *)name
{
_handlers[name] = handler;
}
static BOOL isSupportedVersion(NSNumber *version)
{
NSArray<NSNumber *> *const kSupportedVersions = @[ @(RCT_PACKAGER_CLIENT_PROTOCOL_VERSION) ];
return [kSupportedVersions containsObject:version];
}
#pragma mark - RCTWebSocketProtocolDelegate
- (void)webSocket:(RCTSRWebSocket *)webSocket didReceiveMessage:(id)message
{
if (!_handlers) {
return;
}
NSError *error = nil;
NSDictionary<NSString *, id> *msg = RCTJSONParse(message, &error);
if (error) {
RCTLogError(@"%@ failed to parse message with error %@\n<message>\n%@\n</message>", [self class], error, msg);
return;
}
if (!isSupportedVersion(msg[@"version"])) {
RCTLogError(@"%@ received message with not supported version %@", [self class], msg[@"version"]);
return;
}
id<RCTPackagerClientMethod> methodHandler = _handlers[msg[@"method"]];
if (!methodHandler) {
if (msg[@"id"]) {
NSString *errorMsg = [NSString stringWithFormat:@"%@ no handler found for method %@", [self class], msg[@"method"]];
RCTLogError(errorMsg, msg[@"method"]);
[[[RCTPackagerClientResponder alloc] initWithId:msg[@"id"]
socket:webSocket] respondWithError:errorMsg];
}
return; // If it was a broadcast then we ignore it gracefully
}
if (msg[@"id"]) {
[methodHandler handleRequest:msg[@"params"]
withResponder:[[RCTPackagerClientResponder alloc] initWithId:msg[@"id"]
socket:webSocket]];
} else {
[methodHandler handleNotification:msg[@"params"]];
}
}
@end
#endif