1637 lines
48 KiB
Objective-C
1637 lines
48 KiB
Objective-C
//
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// Copyright 2012 Square Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#import <React/RCTSRWebSocket.h>
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#import <Availability.h>
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#import <Security/SecRandom.h>
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#import <CommonCrypto/CommonDigest.h>
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#import <React/RCTAssert.h>
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#import <React/RCTLog.h>
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typedef NS_ENUM(NSInteger, RCTSROpCode) {
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RCTSROpCodeTextFrame = 0x1,
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RCTSROpCodeBinaryFrame = 0x2,
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// 3-7 reserved.
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RCTSROpCodeConnectionClose = 0x8,
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RCTSROpCodePing = 0x9,
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RCTSROpCodePong = 0xA,
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// B-F reserved.
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};
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typedef struct {
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BOOL fin;
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// BOOL rsv1;
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// BOOL rsv2;
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// BOOL rsv3;
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uint8_t opcode;
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BOOL masked;
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uint64_t payload_length;
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} frame_header;
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static NSString *const RCTSRWebSocketAppendToSecKeyString = @"258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
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//#define RCTSR_ENABLE_LOG
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#ifdef RCTSR_ENABLE_LOG
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#define RCTSRLog(format...) RCTLogInfo(format)
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#else
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#define RCTSRLog(...) do { } while (0)
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#endif
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// This is a hack, and probably not optimal
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static inline int32_t validate_dispatch_data_partial_string(NSData *data)
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{
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static const int maxCodepointSize = 3;
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for (int i = 0; i < maxCodepointSize; i++) {
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NSString *str = [[NSString alloc] initWithBytesNoCopy:(char *)data.bytes length:data.length - i encoding:NSUTF8StringEncoding freeWhenDone:NO];
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if (str) {
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return (int32_t)data.length - i;
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}
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}
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return -1;
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}
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@interface NSData (RCTSRWebSocket)
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@property (nonatomic, readonly, copy) NSString *stringBySHA1ThenBase64Encoding;
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@end
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@interface NSString (RCTSRWebSocket)
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@property (nonatomic, readonly, copy) NSString *stringBySHA1ThenBase64Encoding;
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@end
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@interface NSURL (RCTSRWebSocket)
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// The origin isn't really applicable for a native application.
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// So instead, just map ws -> http and wss -> https.
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@property (nonatomic, readonly, copy) NSString *RCTSR_origin;
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@end
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@interface _RCTSRRunLoopThread : NSThread
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@property (nonatomic, readonly) NSRunLoop *runLoop;
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@end
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static NSString *newSHA1String(const char *bytes, size_t length)
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{
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uint8_t md[CC_SHA1_DIGEST_LENGTH];
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assert(length >= 0);
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assert(length <= UINT32_MAX);
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CC_SHA1(bytes, (CC_LONG)length, md);
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NSData *data = [NSData dataWithBytes:md length:CC_SHA1_DIGEST_LENGTH];
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return [data base64EncodedStringWithOptions:0];
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}
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@implementation NSData (RCTSRWebSocket)
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- (NSString *)stringBySHA1ThenBase64Encoding
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{
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return newSHA1String(self.bytes, self.length);
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}
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@end
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@implementation NSString (RCTSRWebSocket)
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- (NSString *)stringBySHA1ThenBase64Encoding
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{
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return newSHA1String(self.UTF8String, self.length);
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}
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@end
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NSString *const RCTSRWebSocketErrorDomain = @"RCTSRWebSocketErrorDomain";
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NSString *const RCTSRHTTPResponseErrorKey = @"HTTPResponseStatusCode";
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// Returns number of bytes consumed. Returning 0 means you didn't match.
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// Sends bytes to callback handler;
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typedef size_t (^stream_scanner)(NSData *collected_data);
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typedef void (^data_callback)(RCTSRWebSocket *webSocket, NSData *data);
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@interface RCTSRIOConsumer : NSObject
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@property (nonatomic, copy, readonly) stream_scanner consumer;
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@property (nonatomic, copy, readonly) data_callback handler;
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@property (nonatomic, assign) size_t bytesNeeded;
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@property (nonatomic, assign, readonly) BOOL readToCurrentFrame;
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@property (nonatomic, assign, readonly) BOOL unmaskBytes;
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@end
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// This class is not thread-safe, and is expected to always be run on the same queue.
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@interface RCTSRIOConsumerPool : NSObject
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- (instancetype)initWithBufferCapacity:(NSUInteger)poolSize NS_DESIGNATED_INITIALIZER;
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- (RCTSRIOConsumer *)consumerWithScanner:(stream_scanner)scanner handler:(data_callback)handler bytesNeeded:(size_t)bytesNeeded readToCurrentFrame:(BOOL)readToCurrentFrame unmaskBytes:(BOOL)unmaskBytes;
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- (void)returnConsumer:(RCTSRIOConsumer *)consumer;
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@end
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@interface RCTSRWebSocket () <NSStreamDelegate>
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@property (nonatomic, assign) RCTSRReadyState readyState;
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@property (nonatomic, strong) NSOperationQueue *delegateOperationQueue;
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@property (nonatomic, strong) dispatch_queue_t delegateDispatchQueue;
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@end
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@implementation RCTSRWebSocket
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{
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NSInteger _webSocketVersion;
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NSOperationQueue *_delegateOperationQueue;
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dispatch_queue_t _delegateDispatchQueue;
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dispatch_queue_t _workQueue;
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NSMutableArray<RCTSRIOConsumer *> *_consumers;
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NSInputStream *_inputStream;
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NSOutputStream *_outputStream;
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NSMutableData *_readBuffer;
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NSUInteger _readBufferOffset;
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NSMutableData *_outputBuffer;
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NSUInteger _outputBufferOffset;
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uint8_t _currentFrameOpcode;
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size_t _currentFrameCount;
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size_t _readOpCount;
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uint32_t _currentStringScanPosition;
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NSMutableData *_currentFrameData;
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NSString *_closeReason;
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NSString *_secKey;
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BOOL _pinnedCertFound;
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uint8_t _currentReadMaskKey[4];
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size_t _currentReadMaskOffset;
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BOOL _consumerStopped;
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BOOL _closeWhenFinishedWriting;
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BOOL _failed;
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BOOL _secure;
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NSURLRequest *_urlRequest;
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CFHTTPMessageRef _receivedHTTPHeaders;
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BOOL _sentClose;
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BOOL _didFail;
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int _closeCode;
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BOOL _isPumping;
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BOOL _cleanupScheduled;
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NSMutableSet<NSArray *> *_scheduledRunloops;
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// We use this to retain ourselves.
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__strong RCTSRWebSocket *_selfRetain;
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NSArray<NSString *> *_requestedProtocols;
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RCTSRIOConsumerPool *_consumerPool;
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}
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- (instancetype)initWithURLRequest:(NSURLRequest *)request protocols:(NSArray<NSString *> *)protocols
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{
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RCTAssertParam(request);
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if ((self = [super init])) {
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_url = request.URL;
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_urlRequest = request;
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_requestedProtocols = [protocols copy];
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[self _RCTSR_commonInit];
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}
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return self;
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}
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RCT_NOT_IMPLEMENTED(- (instancetype)init)
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- (instancetype)initWithURLRequest:(NSURLRequest *)request
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{
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return [self initWithURLRequest:request protocols:nil];
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}
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- (instancetype)initWithURL:(NSURL *)URL
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{
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return [self initWithURL:URL protocols:nil];
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}
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- (instancetype)initWithURL:(NSURL *)URL protocols:(NSArray<NSString *> *)protocols
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{
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NSMutableURLRequest *request;
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if (URL) {
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// Build a mutable request so we can fill the cookie header.
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request = [NSMutableURLRequest requestWithURL:URL];
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// We load cookies from sharedHTTPCookieStorage (shared with XHR and
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// fetch). To get HTTPS-only cookies for wss URLs, replace wss with https
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// in the URL.
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NSURLComponents *components = [NSURLComponents componentsWithURL:URL resolvingAgainstBaseURL:true];
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if ([components.scheme isEqualToString:@"wss"]) {
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components.scheme = @"https";
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}
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// Load and set the cookie header.
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NSArray<NSHTTPCookie *> *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:components.URL];
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[request setAllHTTPHeaderFields:[NSHTTPCookie requestHeaderFieldsWithCookies:cookies]];
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}
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return [self initWithURLRequest:request protocols:protocols];
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}
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- (void)_RCTSR_commonInit
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{
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NSString *scheme = _url.scheme.lowercaseString;
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assert([scheme isEqualToString:@"ws"] || [scheme isEqualToString:@"http"] || [scheme isEqualToString:@"wss"] || [scheme isEqualToString:@"https"]);
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if ([scheme isEqualToString:@"wss"] || [scheme isEqualToString:@"https"]) {
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_secure = YES;
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}
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_readyState = RCTSR_CONNECTING;
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_consumerStopped = YES;
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_webSocketVersion = 13;
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_workQueue = dispatch_queue_create("com.facebook.react.SRWebSocket", DISPATCH_QUEUE_SERIAL);
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// Going to set a specific on the queue so we can validate we're on the work queue
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dispatch_queue_set_specific(_workQueue, (__bridge void *)self, (__bridge void *)_workQueue, NULL);
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_delegateDispatchQueue = dispatch_get_main_queue();
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_readBuffer = [NSMutableData new];
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_outputBuffer = [NSMutableData new];
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_currentFrameData = [NSMutableData new];
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_consumers = [NSMutableArray new];
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_consumerPool = [RCTSRIOConsumerPool new];
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_scheduledRunloops = [NSMutableSet new];
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[self _initializeStreams];
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// default handlers
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}
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- (void)assertOnWorkQueue
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{
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assert(dispatch_get_specific((__bridge void *)self) == (__bridge void *)_workQueue);
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}
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- (void)dealloc
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{
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_inputStream.delegate = nil;
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_outputStream.delegate = nil;
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[_inputStream close];
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[_outputStream close];
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if (_receivedHTTPHeaders) {
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CFRelease(_receivedHTTPHeaders);
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_receivedHTTPHeaders = NULL;
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}
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}
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#ifndef NDEBUG
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- (void)setReadyState:(RCTSRReadyState)aReadyState
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{
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[self willChangeValueForKey:@"readyState"];
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assert(aReadyState > _readyState);
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_readyState = aReadyState;
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[self didChangeValueForKey:@"readyState"];
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}
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#endif
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- (void)open
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{
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assert(_url);
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RCTAssert(_readyState == RCTSR_CONNECTING, @"Cannot call -(void)open on RCTSRWebSocket more than once");
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_selfRetain = self;
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[self _connect];
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}
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// Calls block on delegate queue
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- (void)_performDelegateBlock:(dispatch_block_t)block
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{
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if (_delegateOperationQueue) {
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[_delegateOperationQueue addOperationWithBlock:block];
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} else {
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assert(_delegateDispatchQueue);
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dispatch_async(_delegateDispatchQueue, block);
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}
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}
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- (void)setDelegateDispatchQueue:(dispatch_queue_t)queue
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{
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_delegateDispatchQueue = queue;
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}
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- (BOOL)_checkHandshake:(CFHTTPMessageRef)httpMessage
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{
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NSString *acceptHeader = CFBridgingRelease(CFHTTPMessageCopyHeaderFieldValue(httpMessage, CFSTR("Sec-WebSocket-Accept")));
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if (acceptHeader == nil) {
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return NO;
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}
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NSString *concattedString = [_secKey stringByAppendingString:RCTSRWebSocketAppendToSecKeyString];
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NSString *expectedAccept = [concattedString stringBySHA1ThenBase64Encoding];
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return [acceptHeader isEqualToString:expectedAccept];
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}
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- (void)_HTTPHeadersDidFinish
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{
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NSInteger responseCode = CFHTTPMessageGetResponseStatusCode(_receivedHTTPHeaders);
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if (responseCode >= 400) {
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RCTSRLog(@"Request failed with response code %ld", responseCode);
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[self _failWithError:[NSError errorWithDomain:RCTSRWebSocketErrorDomain code:2132 userInfo:@{NSLocalizedDescriptionKey:[NSString stringWithFormat:@"received bad response code from server %ld", (long)responseCode], RCTSRHTTPResponseErrorKey:@(responseCode)}]];
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return;
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}
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if (![self _checkHandshake:_receivedHTTPHeaders]) {
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[self _failWithError:[NSError errorWithDomain:RCTSRWebSocketErrorDomain code:2133 userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat:@"Invalid Sec-WebSocket-Accept response"]}]];
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return;
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}
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NSString *negotiatedProtocol = CFBridgingRelease(CFHTTPMessageCopyHeaderFieldValue(_receivedHTTPHeaders, CFSTR("Sec-WebSocket-Protocol")));
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if (negotiatedProtocol) {
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// Make sure we requested the protocol
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if ([_requestedProtocols indexOfObject:negotiatedProtocol] == NSNotFound) {
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[self _failWithError:[NSError errorWithDomain:RCTSRWebSocketErrorDomain code:2133 userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat:@"Server specified Sec-WebSocket-Protocol that wasn't requested"]}]];
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return;
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}
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_protocol = negotiatedProtocol;
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}
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self.readyState = RCTSR_OPEN;
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if (!_didFail) {
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[self _readFrameNew];
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}
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[self _performDelegateBlock:^{
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if ([self.delegate respondsToSelector:@selector(webSocketDidOpen:)]) {
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[self.delegate webSocketDidOpen:self];
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};
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}];
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}
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- (void)_readHTTPHeader
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{
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if (_receivedHTTPHeaders == NULL) {
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_receivedHTTPHeaders = CFHTTPMessageCreateEmpty(NULL, NO);
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}
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[self _readUntilHeaderCompleteWithCallback:^(RCTSRWebSocket *socket, NSData *data) {
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CFHTTPMessageAppendBytes(self->_receivedHTTPHeaders, (const UInt8 *)data.bytes, data.length);
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if (CFHTTPMessageIsHeaderComplete(self->_receivedHTTPHeaders)) {
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RCTSRLog(@"Finished reading headers %@", CFBridgingRelease(CFHTTPMessageCopyAllHeaderFields(_receivedHTTPHeaders)));
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[socket _HTTPHeadersDidFinish];
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} else {
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[socket _readHTTPHeader];
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}
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}];
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}
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- (void)didConnect
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{
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RCTSRLog(@"Connected");
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CFHTTPMessageRef request = CFHTTPMessageCreateRequest(NULL, CFSTR("GET"), (__bridge CFURLRef)_url, kCFHTTPVersion1_1);
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// Set host first so it defaults
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Host"), (__bridge CFStringRef)(_url.port ? [NSString stringWithFormat:@"%@:%@", _url.host, _url.port] : _url.host));
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NSMutableData *keyBytes = [[NSMutableData alloc] initWithLength:16];
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int result __unused = SecRandomCopyBytes(kSecRandomDefault, keyBytes.length, keyBytes.mutableBytes);
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assert(result == 0);
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_secKey = [keyBytes base64EncodedStringWithOptions:0];
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assert([_secKey length] == 24);
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Upgrade"), CFSTR("websocket"));
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Connection"), CFSTR("Upgrade"));
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Sec-WebSocket-Key"), (__bridge CFStringRef)_secKey);
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Sec-WebSocket-Version"), (__bridge CFStringRef)[NSString stringWithFormat:@"%ld", (long)_webSocketVersion]);
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Origin"), (__bridge CFStringRef)_url.RCTSR_origin);
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if (_requestedProtocols) {
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CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Sec-WebSocket-Protocol"), (__bridge CFStringRef)[_requestedProtocols componentsJoinedByString:@", "]);
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}
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[_urlRequest.allHTTPHeaderFields enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
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CFHTTPMessageSetHeaderFieldValue(request, (__bridge CFStringRef)key, (__bridge CFStringRef)obj);
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}];
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NSData *message = CFBridgingRelease(CFHTTPMessageCopySerializedMessage(request));
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CFRelease(request);
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[self _writeData:message];
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[self _readHTTPHeader];
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}
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- (void)_initializeStreams
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{
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assert(_url.port.unsignedIntValue <= UINT32_MAX);
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uint32_t port = _url.port.unsignedIntValue;
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if (port == 0) {
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if (!_secure) {
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port = 80;
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} else {
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port = 443;
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}
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}
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NSString *host = _url.host;
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CFReadStreamRef readStream = NULL;
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CFWriteStreamRef writeStream = NULL;
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CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);
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_outputStream = CFBridgingRelease(writeStream);
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_inputStream = CFBridgingRelease(readStream);
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if (_secure) {
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NSMutableDictionary<NSString *, id> *SSLOptions = [NSMutableDictionary new];
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[_outputStream setProperty:(__bridge id)kCFStreamSocketSecurityLevelNegotiatedSSL forKey:(__bridge id)kCFStreamPropertySocketSecurityLevel];
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// If we're using pinned certs, don't validate the certificate chain
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if (_urlRequest.RCTSR_SSLPinnedCertificates.count) {
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[SSLOptions setValue:@NO forKey:(__bridge id)kCFStreamSSLValidatesCertificateChain];
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}
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#if DEBUG
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[SSLOptions setValue:@NO forKey:(__bridge id)kCFStreamSSLValidatesCertificateChain];
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RCTLogInfo(@"SocketRocket: In debug mode. Allowing connection to any root cert");
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#endif
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[_outputStream setProperty:SSLOptions
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forKey:(__bridge id)kCFStreamPropertySSLSettings];
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}
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_inputStream.delegate = self;
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_outputStream.delegate = self;
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}
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- (void)_connect
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{
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if (!_scheduledRunloops.count) {
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[self scheduleInRunLoop:[NSRunLoop RCTSR_networkRunLoop] forMode:NSDefaultRunLoopMode];
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}
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[_outputStream open];
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[_inputStream open];
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}
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- (void)scheduleInRunLoop:(NSRunLoop *)aRunLoop forMode:(NSString *)mode
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{
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[_outputStream scheduleInRunLoop:aRunLoop forMode:mode];
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|
[_inputStream scheduleInRunLoop:aRunLoop forMode:mode];
|
|
|
|
[_scheduledRunloops addObject:@[aRunLoop, mode]];
|
|
}
|
|
|
|
- (void)unscheduleFromRunLoop:(NSRunLoop *)aRunLoop forMode:(NSString *)mode
|
|
{
|
|
[_outputStream removeFromRunLoop:aRunLoop forMode:mode];
|
|
[_inputStream removeFromRunLoop:aRunLoop forMode:mode];
|
|
|
|
[_scheduledRunloops removeObject:@[aRunLoop, mode]];
|
|
}
|
|
|
|
- (void)close
|
|
{
|
|
[self closeWithCode:RCTSRStatusCodeNormal reason:nil];
|
|
}
|
|
|
|
- (void)closeWithCode:(NSInteger)code reason:(NSString *)reason
|
|
{
|
|
assert(code);
|
|
dispatch_async(_workQueue, ^{
|
|
if (self.readyState == RCTSR_CLOSING || self.readyState == RCTSR_CLOSED) {
|
|
return;
|
|
}
|
|
|
|
BOOL wasConnecting = self.readyState == RCTSR_CONNECTING;
|
|
|
|
self.readyState = RCTSR_CLOSING;
|
|
|
|
RCTSRLog(@"Closing with code %ld reason %@", code, reason);
|
|
|
|
if (wasConnecting) {
|
|
[self _disconnect];
|
|
return;
|
|
}
|
|
|
|
size_t maxMsgSize = [reason maximumLengthOfBytesUsingEncoding:NSUTF8StringEncoding];
|
|
NSMutableData *mutablePayload = [[NSMutableData alloc] initWithLength:sizeof(uint16_t) + maxMsgSize];
|
|
NSData *payload = mutablePayload;
|
|
|
|
((uint16_t *)mutablePayload.mutableBytes)[0] = NSSwapBigShortToHost(code);
|
|
|
|
if (reason) {
|
|
NSRange remainingRange = {0};
|
|
|
|
NSUInteger usedLength = 0;
|
|
|
|
BOOL success __unused = [reason getBytes:(char *)mutablePayload.mutableBytes + sizeof(uint16_t) maxLength:payload.length - sizeof(uint16_t) usedLength:&usedLength encoding:NSUTF8StringEncoding options:NSStringEncodingConversionExternalRepresentation range:NSMakeRange(0, reason.length) remainingRange:&remainingRange];
|
|
|
|
assert(success);
|
|
assert(remainingRange.length == 0);
|
|
|
|
if (usedLength != maxMsgSize) {
|
|
payload = [payload subdataWithRange:NSMakeRange(0, usedLength + sizeof(uint16_t))];
|
|
}
|
|
}
|
|
|
|
[self _sendFrameWithOpcode:RCTSROpCodeConnectionClose data:payload];
|
|
});
|
|
}
|
|
|
|
- (void)_closeWithProtocolError:(NSString *)message
|
|
{
|
|
// Need to shunt this on the _callbackQueue first to see if they received any messages
|
|
[self _performDelegateBlock:^{
|
|
[self closeWithCode:RCTSRStatusCodeProtocolError reason:message];
|
|
dispatch_async(self->_workQueue, ^{
|
|
[self _disconnect];
|
|
});
|
|
}];
|
|
}
|
|
|
|
- (void)_failWithError:(NSError *)error
|
|
{
|
|
dispatch_async(_workQueue, ^{
|
|
if (self.readyState != RCTSR_CLOSED) {
|
|
self->_failed = YES;
|
|
[self _performDelegateBlock:^{
|
|
if ([self.delegate respondsToSelector:@selector(webSocket:didFailWithError:)]) {
|
|
[self.delegate webSocket:self didFailWithError:error];
|
|
}
|
|
}];
|
|
|
|
self.readyState = RCTSR_CLOSED;
|
|
|
|
RCTSRLog(@"Failing with error %@", error.localizedDescription);
|
|
|
|
[self _disconnect];
|
|
[self _scheduleCleanup];
|
|
}
|
|
});
|
|
}
|
|
|
|
- (void)_writeData:(NSData *)data
|
|
{
|
|
[self assertOnWorkQueue];
|
|
|
|
if (_closeWhenFinishedWriting) {
|
|
return;
|
|
}
|
|
[_outputBuffer appendData:data];
|
|
[self _pumpWriting];
|
|
}
|
|
|
|
- (void)send:(id)data
|
|
{
|
|
RCTAssert(self.readyState != RCTSR_CONNECTING, @"Invalid State: Cannot call send: until connection is open");
|
|
if (nil == data) {
|
|
return;
|
|
}
|
|
// TODO: maybe not copy this for performance
|
|
data = [data copy];
|
|
dispatch_async(_workQueue, ^{
|
|
if ([data isKindOfClass:[NSString class]]) {
|
|
[self _sendFrameWithOpcode:RCTSROpCodeTextFrame data:[(NSString *)data dataUsingEncoding:NSUTF8StringEncoding]];
|
|
} else if ([data isKindOfClass:[NSData class]]) {
|
|
[self _sendFrameWithOpcode:RCTSROpCodeBinaryFrame data:data];
|
|
} else {
|
|
assert(NO);
|
|
}
|
|
});
|
|
}
|
|
|
|
- (void)sendPing:(NSData *)data
|
|
{
|
|
RCTAssert(self.readyState == RCTSR_OPEN, @"Invalid State: Cannot call send: until connection is open");
|
|
// TODO: maybe not copy this for performance
|
|
data = [data copy] ?: [NSData data]; // It's okay for a ping to be empty
|
|
dispatch_async(_workQueue, ^{
|
|
[self _sendFrameWithOpcode:RCTSROpCodePing data:data];
|
|
});
|
|
}
|
|
|
|
- (void)handlePing:(NSData *)pingData
|
|
{
|
|
// Need to pingpong this off _callbackQueue first to make sure messages happen in order
|
|
[self _performDelegateBlock:^{
|
|
dispatch_async(self->_workQueue, ^{
|
|
[self _sendFrameWithOpcode:RCTSROpCodePong data:pingData];
|
|
});
|
|
}];
|
|
}
|
|
|
|
- (void)handlePong:(NSData *)pongData
|
|
{
|
|
RCTSRLog(@"Received pong");
|
|
[self _performDelegateBlock:^{
|
|
if ([self.delegate respondsToSelector:@selector(webSocket:didReceivePong:)]) {
|
|
[self.delegate webSocket:self didReceivePong:pongData];
|
|
}
|
|
}];
|
|
}
|
|
|
|
- (void)_handleMessage:(id)message
|
|
{
|
|
RCTSRLog(@"Received message");
|
|
[self _performDelegateBlock:^{
|
|
[self.delegate webSocket:self didReceiveMessage:message];
|
|
}];
|
|
}
|
|
|
|
static inline BOOL closeCodeIsValid(int closeCode)
|
|
{
|
|
if (closeCode < 1000) {
|
|
return NO;
|
|
}
|
|
|
|
if (closeCode >= 1000 && closeCode <= 1011) {
|
|
if (closeCode == 1004 ||
|
|
closeCode == 1005 ||
|
|
closeCode == 1006) {
|
|
return NO;
|
|
}
|
|
return YES;
|
|
}
|
|
|
|
if (closeCode >= 3000 && closeCode <= 3999) {
|
|
return YES;
|
|
}
|
|
|
|
if (closeCode >= 4000 && closeCode <= 4999) {
|
|
return YES;
|
|
}
|
|
|
|
return NO;
|
|
}
|
|
|
|
// Note from RFC:
|
|
//
|
|
// If there is a body, the first two
|
|
// bytes of the body MUST be a 2-byte unsigned integer (in network byte
|
|
// order) representing a status code with value /code/ defined in
|
|
// Section 7.4. Following the 2-byte integer the body MAY contain UTF-8
|
|
// encoded data with value /reason/, the interpretation of which is not
|
|
// defined by this specification.
|
|
|
|
- (void)handleCloseWithData:(NSData *)data
|
|
{
|
|
size_t dataSize = data.length;
|
|
__block uint16_t closeCode = 0;
|
|
|
|
RCTSRLog(@"Received close frame");
|
|
|
|
if (dataSize == 1) {
|
|
// TODO: handle error
|
|
[self _closeWithProtocolError:@"Payload for close must be larger than 2 bytes"];
|
|
return;
|
|
} else if (dataSize >= 2) {
|
|
[data getBytes:&closeCode length:sizeof(closeCode)];
|
|
_closeCode = NSSwapBigShortToHost(closeCode);
|
|
if (!closeCodeIsValid(_closeCode)) {
|
|
[self _closeWithProtocolError:[NSString stringWithFormat:@"Cannot have close code of %d", _closeCode]];
|
|
return;
|
|
}
|
|
if (dataSize > 2) {
|
|
_closeReason = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(2, dataSize - 2)] encoding:NSUTF8StringEncoding];
|
|
if (!_closeReason) {
|
|
[self _closeWithProtocolError:@"Close reason MUST be valid UTF-8"];
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
_closeCode = RCTSRStatusNoStatusReceived;
|
|
}
|
|
|
|
[self assertOnWorkQueue];
|
|
|
|
if (self.readyState == RCTSR_OPEN) {
|
|
[self closeWithCode:1000 reason:nil];
|
|
}
|
|
dispatch_async(_workQueue, ^{
|
|
[self _disconnect];
|
|
});
|
|
}
|
|
|
|
- (void)_disconnect
|
|
{
|
|
[self assertOnWorkQueue];
|
|
RCTSRLog(@"Trying to disconnect");
|
|
_closeWhenFinishedWriting = YES;
|
|
[self _pumpWriting];
|
|
}
|
|
|
|
- (void)_handleFrameWithData:(NSData *)frameData opCode:(NSInteger)opcode
|
|
{
|
|
// Check that the current data is valid UTF8
|
|
|
|
BOOL isControlFrame = (opcode == RCTSROpCodePing || opcode == RCTSROpCodePong || opcode == RCTSROpCodeConnectionClose);
|
|
if (!isControlFrame) {
|
|
[self _readFrameNew];
|
|
} else {
|
|
dispatch_async(_workQueue, ^{
|
|
[self _readFrameContinue];
|
|
});
|
|
}
|
|
|
|
switch (opcode) {
|
|
case RCTSROpCodeTextFrame: {
|
|
NSString *str = [[NSString alloc] initWithData:frameData encoding:NSUTF8StringEncoding];
|
|
if (str == nil && frameData) {
|
|
[self closeWithCode:RCTSRStatusCodeInvalidUTF8 reason:@"Text frames must be valid UTF-8"];
|
|
dispatch_async(_workQueue, ^{
|
|
[self _disconnect];
|
|
});
|
|
|
|
return;
|
|
}
|
|
[self _handleMessage:str];
|
|
break;
|
|
}
|
|
case RCTSROpCodeBinaryFrame:
|
|
[self _handleMessage:[frameData copy]];
|
|
break;
|
|
case RCTSROpCodeConnectionClose:
|
|
[self handleCloseWithData:frameData];
|
|
break;
|
|
case RCTSROpCodePing:
|
|
[self handlePing:frameData];
|
|
break;
|
|
case RCTSROpCodePong:
|
|
[self handlePong:frameData];
|
|
break;
|
|
default:
|
|
[self _closeWithProtocolError:[NSString stringWithFormat:@"Unknown opcode %ld", (long)opcode]];
|
|
// TODO: Handle invalid opcode
|
|
break;
|
|
}
|
|
}
|
|
|
|
- (void)_handleFrameHeader:(frame_header)frame_header curData:(NSData *)curData
|
|
{
|
|
assert(frame_header.opcode != 0);
|
|
|
|
if (self.readyState != RCTSR_OPEN) {
|
|
return;
|
|
}
|
|
|
|
BOOL isControlFrame = (frame_header.opcode == RCTSROpCodePing || frame_header.opcode == RCTSROpCodePong || frame_header.opcode == RCTSROpCodeConnectionClose);
|
|
|
|
if (isControlFrame && !frame_header.fin) {
|
|
[self _closeWithProtocolError:@"Fragmented control frames not allowed"];
|
|
return;
|
|
}
|
|
|
|
if (isControlFrame && frame_header.payload_length >= 126) {
|
|
[self _closeWithProtocolError:@"Control frames cannot have payloads larger than 126 bytes"];
|
|
return;
|
|
}
|
|
|
|
if (!isControlFrame) {
|
|
_currentFrameOpcode = frame_header.opcode;
|
|
_currentFrameCount += 1;
|
|
}
|
|
|
|
if (frame_header.payload_length == 0) {
|
|
if (isControlFrame) {
|
|
[self _handleFrameWithData:curData opCode:frame_header.opcode];
|
|
} else {
|
|
if (frame_header.fin) {
|
|
[self _handleFrameWithData:_currentFrameData opCode:frame_header.opcode];
|
|
} else {
|
|
// TODO: add assert that opcode is not a control;
|
|
[self _readFrameContinue];
|
|
}
|
|
}
|
|
} else {
|
|
assert(frame_header.payload_length <= SIZE_T_MAX);
|
|
[self _addConsumerWithDataLength:(size_t)frame_header.payload_length callback:^(RCTSRWebSocket *socket, NSData *newData) {
|
|
if (isControlFrame) {
|
|
[socket _handleFrameWithData:newData opCode:frame_header.opcode];
|
|
} else {
|
|
if (frame_header.fin) {
|
|
[socket _handleFrameWithData:socket->_currentFrameData opCode:frame_header.opcode];
|
|
} else {
|
|
// TODO: add assert that opcode is not a control;
|
|
[socket _readFrameContinue];
|
|
}
|
|
|
|
}
|
|
} readToCurrentFrame:!isControlFrame unmaskBytes:frame_header.masked];
|
|
}
|
|
}
|
|
|
|
/* From RFC:
|
|
|
|
0 1 2 3
|
|
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
+-+-+-+-+-------+-+-------------+-------------------------------+
|
|
|F|R|R|R| opcode|M| Payload len | Extended payload length |
|
|
|I|S|S|S| (4) |A| (7) | (16/64) |
|
|
|N|V|V|V| |S| | (if payload len==126/127) |
|
|
| |1|2|3| |K| | |
|
|
+-+-+-+-+-------+-+-------------+ - - - - - - - - - - - - - - - +
|
|
| Extended payload length continued, if payload len == 127 |
|
|
+ - - - - - - - - - - - - - - - +-------------------------------+
|
|
| |Masking-key, if MASK set to 1 |
|
|
+-------------------------------+-------------------------------+
|
|
| Masking-key (continued) | Payload Data |
|
|
+-------------------------------- - - - - - - - - - - - - - - - +
|
|
: Payload Data continued ... :
|
|
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
|
|
| Payload Data continued ... |
|
|
+---------------------------------------------------------------+
|
|
*/
|
|
|
|
static const uint8_t RCTSRFinMask = 0x80;
|
|
static const uint8_t RCTSROpCodeMask = 0x0F;
|
|
static const uint8_t RCTSRRsvMask = 0x70;
|
|
static const uint8_t RCTSRMaskMask = 0x80;
|
|
static const uint8_t RCTSRPayloadLenMask = 0x7F;
|
|
|
|
- (void)_readFrameContinue
|
|
{
|
|
assert((_currentFrameCount == 0 && _currentFrameOpcode == 0) || (_currentFrameCount > 0 && _currentFrameOpcode > 0));
|
|
|
|
[self _addConsumerWithDataLength:2 callback:^(RCTSRWebSocket *socket, NSData *data) {
|
|
__block frame_header header = {0};
|
|
|
|
const uint8_t *headerBuffer = data.bytes;
|
|
assert(data.length >= 2);
|
|
|
|
if (headerBuffer[0] & RCTSRRsvMask) {
|
|
[socket _closeWithProtocolError:@"Server used RSV bits"];
|
|
return;
|
|
}
|
|
|
|
uint8_t receivedOpcode = (RCTSROpCodeMask &headerBuffer[0]);
|
|
|
|
BOOL isControlFrame = (receivedOpcode == RCTSROpCodePing || receivedOpcode == RCTSROpCodePong || receivedOpcode == RCTSROpCodeConnectionClose);
|
|
|
|
if (!isControlFrame && receivedOpcode != 0 && socket->_currentFrameCount > 0) {
|
|
[socket _closeWithProtocolError:@"all data frames after the initial data frame must have opcode 0"];
|
|
return;
|
|
}
|
|
|
|
if (receivedOpcode == 0 && socket->_currentFrameCount == 0) {
|
|
[socket _closeWithProtocolError:@"cannot continue a message"];
|
|
return;
|
|
}
|
|
|
|
header.opcode = receivedOpcode == 0 ? socket->_currentFrameOpcode : receivedOpcode;
|
|
|
|
header.fin = !!(RCTSRFinMask &headerBuffer[0]);
|
|
|
|
|
|
header.masked = !!(RCTSRMaskMask &headerBuffer[1]);
|
|
header.payload_length = RCTSRPayloadLenMask & headerBuffer[1];
|
|
|
|
headerBuffer = NULL;
|
|
|
|
if (header.masked) {
|
|
[socket _closeWithProtocolError:@"Client must receive unmasked data"];
|
|
}
|
|
|
|
size_t extra_bytes_needed = header.masked ? sizeof(self->_currentReadMaskKey) : 0;
|
|
|
|
if (header.payload_length == 126) {
|
|
extra_bytes_needed += sizeof(uint16_t);
|
|
} else if (header.payload_length == 127) {
|
|
extra_bytes_needed += sizeof(uint64_t);
|
|
}
|
|
|
|
if (extra_bytes_needed == 0) {
|
|
[socket _handleFrameHeader:header curData:socket->_currentFrameData];
|
|
} else {
|
|
[socket _addConsumerWithDataLength:extra_bytes_needed callback:^(RCTSRWebSocket *_socket, NSData *_data) {
|
|
size_t mapped_size __unused = _data.length;
|
|
const void *mapped_buffer = _data.bytes;
|
|
size_t offset = 0;
|
|
|
|
if (header.payload_length == 126) {
|
|
assert(mapped_size >= sizeof(uint16_t));
|
|
uint16_t newLen = NSSwapBigShortToHost(*(uint16_t *)(mapped_buffer));
|
|
header.payload_length = newLen;
|
|
offset += sizeof(uint16_t);
|
|
} else if (header.payload_length == 127) {
|
|
assert(mapped_size >= sizeof(uint64_t));
|
|
header.payload_length = NSSwapBigLongLongToHost(*(uint64_t *)(mapped_buffer));
|
|
offset += sizeof(uint64_t);
|
|
} else {
|
|
assert(header.payload_length < 126 && header.payload_length >= 0);
|
|
}
|
|
|
|
if (header.masked) {
|
|
assert(mapped_size >= sizeof(self->_currentReadMaskOffset) + offset);
|
|
memcpy(_socket->_currentReadMaskKey, ((uint8_t *)mapped_buffer) + offset, sizeof(_socket->_currentReadMaskKey));
|
|
}
|
|
|
|
[_socket _handleFrameHeader:header curData:_socket->_currentFrameData];
|
|
} readToCurrentFrame:NO unmaskBytes:NO];
|
|
}
|
|
} readToCurrentFrame:NO unmaskBytes:NO];
|
|
}
|
|
|
|
- (void)_readFrameNew
|
|
{
|
|
dispatch_async(_workQueue, ^{
|
|
self->_currentFrameData.length = 0;
|
|
|
|
self->_currentFrameOpcode = 0;
|
|
self->_currentFrameCount = 0;
|
|
self->_readOpCount = 0;
|
|
self->_currentStringScanPosition = 0;
|
|
|
|
[self _readFrameContinue];
|
|
});
|
|
}
|
|
|
|
- (void)_pumpWriting
|
|
{
|
|
[self assertOnWorkQueue];
|
|
|
|
NSUInteger dataLength = _outputBuffer.length;
|
|
if (dataLength - _outputBufferOffset > 0 && _outputStream.hasSpaceAvailable) {
|
|
NSInteger bytesWritten = [_outputStream write:_outputBuffer.bytes + _outputBufferOffset maxLength:dataLength - _outputBufferOffset];
|
|
if (bytesWritten == -1) {
|
|
[self _failWithError:[NSError errorWithDomain:RCTSRWebSocketErrorDomain code:2145 userInfo:@{NSLocalizedDescriptionKey: @"Error writing to stream"}]];
|
|
return;
|
|
}
|
|
|
|
_outputBufferOffset += bytesWritten;
|
|
|
|
if (_outputBufferOffset > 4096 && _outputBufferOffset > (_outputBuffer.length >> 1)) {
|
|
_outputBuffer = [[NSMutableData alloc] initWithBytes:(char *)_outputBuffer.bytes + _outputBufferOffset length:_outputBuffer.length - _outputBufferOffset];
|
|
_outputBufferOffset = 0;
|
|
}
|
|
}
|
|
|
|
if (_closeWhenFinishedWriting &&
|
|
_outputBuffer.length - _outputBufferOffset == 0 &&
|
|
(_inputStream.streamStatus != NSStreamStatusNotOpen &&
|
|
_inputStream.streamStatus != NSStreamStatusClosed) &&
|
|
!_sentClose) {
|
|
_sentClose = YES;
|
|
|
|
[self _scheduleCleanup];
|
|
|
|
if (!_failed) {
|
|
[self _performDelegateBlock:^{
|
|
if ([self.delegate respondsToSelector:@selector(webSocket:didCloseWithCode:reason:wasClean:)]) {
|
|
[self.delegate webSocket:self didCloseWithCode:self->_closeCode reason:self->_closeReason wasClean:YES];
|
|
}
|
|
}];
|
|
}
|
|
}
|
|
}
|
|
|
|
- (void)_addConsumerWithScanner:(stream_scanner)consumer callback:(data_callback)callback
|
|
{
|
|
[self assertOnWorkQueue];
|
|
[self _addConsumerWithScanner:consumer callback:callback dataLength:0];
|
|
}
|
|
|
|
- (void)_addConsumerWithDataLength:(size_t)dataLength callback:(data_callback)callback readToCurrentFrame:(BOOL)readToCurrentFrame unmaskBytes:(BOOL)unmaskBytes
|
|
{
|
|
[self assertOnWorkQueue];
|
|
assert(dataLength);
|
|
|
|
[_consumers addObject:[_consumerPool consumerWithScanner:nil handler:callback bytesNeeded:dataLength readToCurrentFrame:readToCurrentFrame unmaskBytes:unmaskBytes]];
|
|
[self _pumpScanner];
|
|
}
|
|
|
|
- (void)_addConsumerWithScanner:(stream_scanner)consumer callback:(data_callback)callback dataLength:(size_t)dataLength
|
|
{
|
|
[self assertOnWorkQueue];
|
|
[_consumers addObject:[_consumerPool consumerWithScanner:consumer handler:callback bytesNeeded:dataLength readToCurrentFrame:NO unmaskBytes:NO]];
|
|
[self _pumpScanner];
|
|
}
|
|
|
|
static const char CRLFCRLFBytes[] = {'\r', '\n', '\r', '\n'};
|
|
|
|
- (void)_readUntilHeaderCompleteWithCallback:(data_callback)dataHandler
|
|
{
|
|
[self _readUntilBytes:CRLFCRLFBytes length:sizeof(CRLFCRLFBytes) callback:dataHandler];
|
|
}
|
|
|
|
- (void)_readUntilBytes:(const void *)bytes length:(size_t)length callback:(data_callback)dataHandler
|
|
{
|
|
// TODO: optimize so this can continue from where we last searched
|
|
stream_scanner consumer = ^size_t(NSData *data) {
|
|
__block size_t found_size = 0;
|
|
__block size_t match_count = 0;
|
|
|
|
size_t size = data.length;
|
|
const unsigned char *buffer = data.bytes;
|
|
for (size_t i = 0; i < size; i++ ) {
|
|
if (((const unsigned char *)buffer)[i] == ((const unsigned char *)bytes)[match_count]) {
|
|
match_count += 1;
|
|
if (match_count == length) {
|
|
found_size = i + 1;
|
|
break;
|
|
}
|
|
} else {
|
|
match_count = 0;
|
|
}
|
|
}
|
|
return found_size;
|
|
};
|
|
[self _addConsumerWithScanner:consumer callback:dataHandler];
|
|
}
|
|
|
|
// Returns true if did work
|
|
- (BOOL)_innerPumpScanner
|
|
{
|
|
BOOL didWork = NO;
|
|
|
|
if (self.readyState >= RCTSR_CLOSING) {
|
|
return didWork;
|
|
}
|
|
|
|
if (!_consumers.count) {
|
|
return didWork;
|
|
}
|
|
|
|
size_t curSize = _readBuffer.length - _readBufferOffset;
|
|
if (!curSize) {
|
|
return didWork;
|
|
}
|
|
|
|
RCTSRIOConsumer *consumer = _consumers[0];
|
|
|
|
size_t bytesNeeded = consumer.bytesNeeded;
|
|
|
|
size_t foundSize = 0;
|
|
if (consumer.consumer) {
|
|
NSData *tempView = [NSData dataWithBytesNoCopy:(char *)_readBuffer.bytes + _readBufferOffset length:_readBuffer.length - _readBufferOffset freeWhenDone:NO];
|
|
foundSize = consumer.consumer(tempView);
|
|
} else {
|
|
assert(consumer.bytesNeeded);
|
|
if (curSize >= bytesNeeded) {
|
|
foundSize = bytesNeeded;
|
|
} else if (consumer.readToCurrentFrame) {
|
|
foundSize = curSize;
|
|
}
|
|
}
|
|
|
|
NSData *slice = nil;
|
|
if (consumer.readToCurrentFrame || foundSize) {
|
|
NSRange sliceRange = NSMakeRange(_readBufferOffset, foundSize);
|
|
slice = [_readBuffer subdataWithRange:sliceRange];
|
|
|
|
_readBufferOffset += foundSize;
|
|
|
|
if (_readBufferOffset > 4096 && _readBufferOffset > (_readBuffer.length >> 1)) {
|
|
_readBuffer = [[NSMutableData alloc] initWithBytes:(char *)_readBuffer.bytes + _readBufferOffset length:_readBuffer.length - _readBufferOffset]; _readBufferOffset = 0;
|
|
}
|
|
|
|
if (consumer.unmaskBytes) {
|
|
NSMutableData *mutableSlice = [slice mutableCopy];
|
|
|
|
NSUInteger len = mutableSlice.length;
|
|
uint8_t *bytes = mutableSlice.mutableBytes;
|
|
|
|
for (NSUInteger i = 0; i < len; i++) {
|
|
bytes[i] = bytes[i] ^ _currentReadMaskKey[_currentReadMaskOffset % sizeof(_currentReadMaskKey)];
|
|
_currentReadMaskOffset += 1;
|
|
}
|
|
|
|
slice = mutableSlice;
|
|
}
|
|
|
|
if (consumer.readToCurrentFrame) {
|
|
[_currentFrameData appendData:slice];
|
|
|
|
_readOpCount += 1;
|
|
|
|
if (_currentFrameOpcode == RCTSROpCodeTextFrame) {
|
|
// Validate UTF8 stuff.
|
|
size_t currentDataSize = _currentFrameData.length;
|
|
if (_currentFrameOpcode == RCTSROpCodeTextFrame && currentDataSize > 0) {
|
|
// TODO: Optimize this. Don't really have to copy all the data each time
|
|
|
|
size_t scanSize = currentDataSize - _currentStringScanPosition;
|
|
|
|
NSData *scan_data = [_currentFrameData subdataWithRange:NSMakeRange(_currentStringScanPosition, scanSize)];
|
|
int32_t valid_utf8_size = validate_dispatch_data_partial_string(scan_data);
|
|
|
|
if (valid_utf8_size == -1) {
|
|
[self closeWithCode:RCTSRStatusCodeInvalidUTF8 reason:@"Text frames must be valid UTF-8"];
|
|
dispatch_async(_workQueue, ^{
|
|
[self _disconnect];
|
|
});
|
|
return didWork;
|
|
} else {
|
|
_currentStringScanPosition += valid_utf8_size;
|
|
}
|
|
}
|
|
}
|
|
|
|
consumer.bytesNeeded -= foundSize;
|
|
|
|
if (consumer.bytesNeeded == 0) {
|
|
[_consumers removeObjectAtIndex:0];
|
|
consumer.handler(self, nil);
|
|
[_consumerPool returnConsumer:consumer];
|
|
didWork = YES;
|
|
}
|
|
} else if (foundSize) {
|
|
[_consumers removeObjectAtIndex:0];
|
|
consumer.handler(self, slice);
|
|
[_consumerPool returnConsumer:consumer];
|
|
didWork = YES;
|
|
}
|
|
}
|
|
return didWork;
|
|
}
|
|
|
|
- (void)_pumpScanner
|
|
{
|
|
[self assertOnWorkQueue];
|
|
|
|
if (!_isPumping) {
|
|
_isPumping = YES;
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
while ([self _innerPumpScanner]) {}
|
|
|
|
_isPumping = NO;
|
|
}
|
|
|
|
//#define NOMASK
|
|
|
|
static const size_t RCTSRFrameHeaderOverhead = 32;
|
|
|
|
- (void)_sendFrameWithOpcode:(RCTSROpCode)opcode data:(NSData *)data
|
|
{
|
|
[self assertOnWorkQueue];
|
|
|
|
if (nil == data) {
|
|
return;
|
|
}
|
|
|
|
size_t payloadLength = [data length];
|
|
|
|
NSMutableData *frame = [[NSMutableData alloc] initWithLength:payloadLength + RCTSRFrameHeaderOverhead];
|
|
if (!frame) {
|
|
[self closeWithCode:RCTSRStatusCodeMessageTooBig reason:@"Message too big"];
|
|
return;
|
|
}
|
|
uint8_t *frame_buffer = (uint8_t *)frame.mutableBytes;
|
|
|
|
// set fin
|
|
frame_buffer[0] = RCTSRFinMask | opcode;
|
|
|
|
BOOL useMask = YES;
|
|
#ifdef NOMASK
|
|
useMask = NO;
|
|
#endif
|
|
|
|
if (useMask) {
|
|
// set the mask and header
|
|
frame_buffer[1] |= RCTSRMaskMask;
|
|
}
|
|
|
|
size_t frame_buffer_size = 2;
|
|
|
|
const uint8_t *unmasked_payload = (uint8_t *)[data bytes];
|
|
|
|
if (payloadLength < 126) {
|
|
frame_buffer[1] |= payloadLength;
|
|
} else if (payloadLength <= UINT16_MAX) {
|
|
frame_buffer[1] |= 126;
|
|
*((uint16_t *)(frame_buffer + frame_buffer_size)) = NSSwapBigShortToHost((uint16_t)payloadLength);
|
|
frame_buffer_size += sizeof(uint16_t);
|
|
} else {
|
|
frame_buffer[1] |= 127;
|
|
*((uint64_t *)(frame_buffer + frame_buffer_size)) = NSSwapBigLongLongToHost((uint64_t)payloadLength);
|
|
frame_buffer_size += sizeof(uint64_t);
|
|
}
|
|
|
|
if (!useMask) {
|
|
for (size_t i = 0; i < payloadLength; i++) {
|
|
frame_buffer[frame_buffer_size] = unmasked_payload[i];
|
|
frame_buffer_size += 1;
|
|
}
|
|
} else {
|
|
uint8_t *mask_key = frame_buffer + frame_buffer_size;
|
|
int result __unused = SecRandomCopyBytes(kSecRandomDefault, sizeof(uint32_t), (uint8_t *)mask_key);
|
|
assert(result == 0);
|
|
frame_buffer_size += sizeof(uint32_t);
|
|
|
|
// TODO: could probably optimize this with SIMD
|
|
for (size_t i = 0; i < payloadLength; i++) {
|
|
frame_buffer[frame_buffer_size] = unmasked_payload[i] ^ mask_key[i % sizeof(uint32_t)];
|
|
frame_buffer_size += 1;
|
|
}
|
|
}
|
|
|
|
assert(frame_buffer_size <= [frame length]);
|
|
frame.length = frame_buffer_size;
|
|
|
|
[self _writeData:frame];
|
|
}
|
|
|
|
- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
|
|
{
|
|
if (_secure && !_pinnedCertFound && (eventCode == NSStreamEventHasBytesAvailable || eventCode == NSStreamEventHasSpaceAvailable)) {
|
|
NSArray *sslCerts = _urlRequest.RCTSR_SSLPinnedCertificates;
|
|
if (sslCerts) {
|
|
SecTrustRef secTrust = (__bridge SecTrustRef)[aStream propertyForKey:(__bridge id)kCFStreamPropertySSLPeerTrust];
|
|
if (secTrust) {
|
|
NSInteger numCerts = SecTrustGetCertificateCount(secTrust);
|
|
for (NSInteger i = 0; i < numCerts && !_pinnedCertFound; i++) {
|
|
SecCertificateRef cert = SecTrustGetCertificateAtIndex(secTrust, i);
|
|
NSData *certData = CFBridgingRelease(SecCertificateCopyData(cert));
|
|
|
|
for (id ref in sslCerts) {
|
|
SecCertificateRef trustedCert = (__bridge SecCertificateRef)ref;
|
|
NSData *trustedCertData = CFBridgingRelease(SecCertificateCopyData(trustedCert));
|
|
|
|
if ([trustedCertData isEqualToData:certData]) {
|
|
_pinnedCertFound = YES;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!_pinnedCertFound) {
|
|
dispatch_async(_workQueue, ^{
|
|
[self _failWithError:[NSError errorWithDomain:RCTSRWebSocketErrorDomain code:23556 userInfo:@{NSLocalizedDescriptionKey: [NSString stringWithFormat:@"Invalid server cert"]}]];
|
|
});
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// _workQueue cannot be NULL
|
|
if (!_workQueue) {
|
|
return;
|
|
}
|
|
__weak typeof(self) weakSelf = self;
|
|
dispatch_async(_workQueue, ^{
|
|
typeof(self) strongSelf = weakSelf;
|
|
if (!strongSelf) {
|
|
return;
|
|
}
|
|
[strongSelf safeHandleEvent:eventCode stream:aStream];
|
|
});
|
|
}
|
|
|
|
- (void)safeHandleEvent:(NSStreamEvent)eventCode stream:(NSStream *)aStream
|
|
{
|
|
switch (eventCode) {
|
|
case NSStreamEventOpenCompleted: {
|
|
RCTSRLog(@"NSStreamEventOpenCompleted %@", aStream);
|
|
if (self.readyState >= RCTSR_CLOSING) {
|
|
return;
|
|
}
|
|
assert(self->_readBuffer);
|
|
|
|
if (self.readyState == RCTSR_CONNECTING && aStream == self->_inputStream) {
|
|
[self didConnect];
|
|
}
|
|
[self _pumpWriting];
|
|
[self _pumpScanner];
|
|
break;
|
|
}
|
|
|
|
case NSStreamEventErrorOccurred: {
|
|
RCTSRLog(@"NSStreamEventErrorOccurred %@ %@", aStream, [aStream.streamError copy]);
|
|
// TODO: specify error better!
|
|
[self _failWithError:aStream.streamError];
|
|
self->_readBufferOffset = 0;
|
|
self->_readBuffer.length = 0;
|
|
break;
|
|
|
|
}
|
|
|
|
case NSStreamEventEndEncountered: {
|
|
[self _pumpScanner];
|
|
RCTSRLog(@"NSStreamEventEndEncountered %@", aStream);
|
|
if (aStream.streamError) {
|
|
[self _failWithError:aStream.streamError];
|
|
} else {
|
|
dispatch_async(self->_workQueue, ^{
|
|
if (self.readyState != RCTSR_CLOSED) {
|
|
self.readyState = RCTSR_CLOSED;
|
|
[self _scheduleCleanup];
|
|
}
|
|
|
|
if (!self->_sentClose && !self->_failed) {
|
|
self->_sentClose = YES;
|
|
// If we get closed in this state it's probably not clean because we should be sending this when we send messages
|
|
[self _performDelegateBlock:^{
|
|
if ([self.delegate respondsToSelector:@selector(webSocket:didCloseWithCode:reason:wasClean:)]) {
|
|
[self.delegate webSocket:self didCloseWithCode:RCTSRStatusCodeGoingAway reason:@"Stream end encountered" wasClean:NO];
|
|
}
|
|
}];
|
|
}
|
|
});
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case NSStreamEventHasBytesAvailable: {
|
|
RCTSRLog(@"NSStreamEventHasBytesAvailable %@", aStream);
|
|
const int bufferSize = 2048;
|
|
uint8_t buffer[bufferSize];
|
|
|
|
while (self->_inputStream.hasBytesAvailable) {
|
|
NSInteger bytes_read = [self->_inputStream read:buffer maxLength:bufferSize];
|
|
|
|
if (bytes_read > 0) {
|
|
[self->_readBuffer appendBytes:buffer length:bytes_read];
|
|
} else if (bytes_read < 0) {
|
|
[self _failWithError:self->_inputStream.streamError];
|
|
}
|
|
|
|
if (bytes_read != bufferSize) {
|
|
break;
|
|
}
|
|
};
|
|
[self _pumpScanner];
|
|
break;
|
|
}
|
|
|
|
case NSStreamEventHasSpaceAvailable: {
|
|
RCTSRLog(@"NSStreamEventHasSpaceAvailable %@", aStream);
|
|
[self _pumpWriting];
|
|
break;
|
|
}
|
|
|
|
default:
|
|
RCTSRLog(@"(default) %@", aStream);
|
|
break;
|
|
}
|
|
}
|
|
|
|
- (void)_scheduleCleanup
|
|
{
|
|
if (_cleanupScheduled) {
|
|
return;
|
|
}
|
|
|
|
_cleanupScheduled = YES;
|
|
|
|
// Cleanup NSStream's delegate in the same RunLoop used by the streams themselves:
|
|
// This way we'll prevent race conditions between handleEvent and SRWebsocket's dealloc
|
|
NSTimer *timer = [NSTimer timerWithTimeInterval:(0.0f) target:self selector:@selector(_cleanupSelfReference:) userInfo:nil repeats:NO];
|
|
[[NSRunLoop RCTSR_networkRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
|
|
}
|
|
|
|
- (void)_cleanupSelfReference:(NSTimer *)timer
|
|
{
|
|
// Remove the streams, right now, from the networkRunLoop
|
|
[_inputStream close];
|
|
[_outputStream close];
|
|
|
|
// Unschedule from RunLoop
|
|
for (NSArray *runLoop in [_scheduledRunloops copy]) {
|
|
[self unscheduleFromRunLoop:runLoop[0] forMode:runLoop[1]];
|
|
}
|
|
|
|
// Nuke NSStream's delegate
|
|
_inputStream.delegate = nil;
|
|
_outputStream.delegate = nil;
|
|
|
|
// Cleanup selfRetain in the same GCD queue as usual
|
|
dispatch_async(_workQueue, ^{
|
|
self->_selfRetain = nil;
|
|
});
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation RCTSRIOConsumer
|
|
|
|
- (void)setupWithScanner:(stream_scanner)scanner handler:(data_callback)handler bytesNeeded:(size_t)bytesNeeded readToCurrentFrame:(BOOL)readToCurrentFrame unmaskBytes:(BOOL)unmaskBytes
|
|
{
|
|
_consumer = [scanner copy];
|
|
_handler = [handler copy];
|
|
_bytesNeeded = bytesNeeded;
|
|
_readToCurrentFrame = readToCurrentFrame;
|
|
_unmaskBytes = unmaskBytes;
|
|
assert(_consumer || _bytesNeeded);
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation RCTSRIOConsumerPool
|
|
{
|
|
NSUInteger _poolSize;
|
|
NSMutableArray<RCTSRIOConsumer *> *_bufferedConsumers;
|
|
}
|
|
|
|
- (instancetype)initWithBufferCapacity:(NSUInteger)poolSize
|
|
{
|
|
if ((self = [super init])) {
|
|
_poolSize = poolSize;
|
|
_bufferedConsumers = [[NSMutableArray alloc] initWithCapacity:poolSize];
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (instancetype)init
|
|
{
|
|
return [self initWithBufferCapacity:8];
|
|
}
|
|
|
|
- (RCTSRIOConsumer *)consumerWithScanner:(stream_scanner)scanner handler:(data_callback)handler bytesNeeded:(size_t)bytesNeeded readToCurrentFrame:(BOOL)readToCurrentFrame unmaskBytes:(BOOL)unmaskBytes
|
|
{
|
|
RCTSRIOConsumer *consumer = nil;
|
|
if (_bufferedConsumers.count) {
|
|
consumer = _bufferedConsumers.lastObject;
|
|
[_bufferedConsumers removeLastObject];
|
|
} else {
|
|
consumer = [RCTSRIOConsumer new];
|
|
}
|
|
|
|
[consumer setupWithScanner:scanner handler:handler bytesNeeded:bytesNeeded readToCurrentFrame:readToCurrentFrame unmaskBytes:unmaskBytes];
|
|
|
|
return consumer;
|
|
}
|
|
|
|
- (void)returnConsumer:(RCTSRIOConsumer *)consumer
|
|
{
|
|
if (_bufferedConsumers.count < _poolSize) {
|
|
[_bufferedConsumers addObject:consumer];
|
|
}
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation NSURLRequest (CertificateAdditions)
|
|
|
|
- (NSArray *)RCTSR_SSLPinnedCertificates
|
|
{
|
|
return [NSURLProtocol propertyForKey:@"RCTSR_SSLPinnedCertificates" inRequest:self];
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation NSMutableURLRequest (CertificateAdditions)
|
|
|
|
- (NSArray *)RCTSR_SSLPinnedCertificates
|
|
{
|
|
return [NSURLProtocol propertyForKey:@"RCTSR_SSLPinnedCertificates" inRequest:self];
|
|
}
|
|
|
|
- (void)setRCTSR_SSLPinnedCertificates:(NSArray *)RCTSR_SSLPinnedCertificates
|
|
{
|
|
[NSURLProtocol setProperty:RCTSR_SSLPinnedCertificates forKey:@"RCTSR_SSLPinnedCertificates" inRequest:self];
|
|
}
|
|
|
|
@end
|
|
|
|
@implementation NSURL (RCTSRWebSocket)
|
|
|
|
- (NSString *)RCTSR_origin
|
|
{
|
|
NSString *scheme = self.scheme.lowercaseString;
|
|
|
|
if ([scheme isEqualToString:@"wss"]) {
|
|
scheme = @"https";
|
|
} else if ([scheme isEqualToString:@"ws"]) {
|
|
scheme = @"http";
|
|
}
|
|
|
|
int defaultPort = ([scheme isEqualToString:@"https"] ? 443 :
|
|
[scheme isEqualToString:@"http"] ? 80 :
|
|
-1);
|
|
int port = self.port.intValue;
|
|
if (port > 0 && port != defaultPort) {
|
|
return [NSString stringWithFormat:@"%@://%@:%d", scheme, self.host, port];
|
|
} else {
|
|
return [NSString stringWithFormat:@"%@://%@", scheme, self.host];
|
|
}
|
|
}
|
|
|
|
@end
|
|
|
|
static _RCTSRRunLoopThread *networkThread = nil;
|
|
static NSRunLoop *networkRunLoop = nil;
|
|
|
|
@implementation NSRunLoop (RCTSRWebSocket)
|
|
|
|
+ (NSRunLoop *)RCTSR_networkRunLoop
|
|
{
|
|
static dispatch_once_t onceToken;
|
|
dispatch_once(&onceToken, ^{
|
|
networkThread = [_RCTSRRunLoopThread new];
|
|
networkThread.name = @"com.squareup.SocketRocket.NetworkThread";
|
|
[networkThread start];
|
|
networkRunLoop = networkThread.runLoop;
|
|
});
|
|
|
|
return networkRunLoop;
|
|
}
|
|
|
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@end
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@implementation _RCTSRRunLoopThread
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{
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dispatch_group_t _waitGroup;
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}
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@synthesize runLoop = _runLoop;
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- (instancetype)init
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{
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if ((self = [super init])) {
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_waitGroup = dispatch_group_create();
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dispatch_group_enter(_waitGroup);
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}
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return self;
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}
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- (void)main
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{
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@autoreleasepool {
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_runLoop = [NSRunLoop currentRunLoop];
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dispatch_group_leave(_waitGroup);
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|
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NSTimer *timer = [[NSTimer alloc] initWithFireDate:[NSDate distantFuture] interval:0.0 target:self selector:@selector(step) userInfo:nil repeats:NO];
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[_runLoop addTimer:timer forMode:NSDefaultRunLoopMode];
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while ([_runLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]]) { }
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assert(NO);
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}
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}
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- (void)step
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{
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// Does nothing
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|
}
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|
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- (NSRunLoop *)runLoop
|
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{
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dispatch_group_wait(_waitGroup, DISPATCH_TIME_FOREVER);
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return _runLoop;
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}
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|
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@end
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