Android Socket 與 IOS Socket

最近作了一個項目，支持Android和ios兩個平臺。

這個項目中會用到一些簡單的Socket通訊，因此就有機會接觸到了Android和ios兩個平臺的Socket實現。

如今將android和ios的Socekt作一些總結：

Android:

 

//創建Socket鏈接
public boolean connect() throws IOException {
        LogUtils.LOGI(TAG, "Conect to socket in ");
        // Close socket first.
        close();
        if (null == mControlSock) {
            try {
                mControlSock = PlainSocket.createPlainSocket(mRemoteAddr,
                        SOCKET_PORT, LONG_TIMEOUT);
                setTimeout();
                initStreams();
                isCamMode = -1;
                // isConnected = true;
            } catch (IOException ex) {
                if (null != mControlSock) {
                    mControlSock.close();
                }
                mControlSock = null;
                // isConnected = false;
                // throw ex;
                ex.printStackTrace();
            }
        }
        LogUtils.LOGI(TAG, "Conenect socket status = " + isConnected());
        return isConnected();
    }
//斷開Socket鏈接
    public void close() throws IOException {
        IOException ex = null;

        if (null != mWriter) {
            try {
                mWriter.close();
                mWriter = null;
            } catch (IOException e) {
                ex = e;
            }
        }

        if (null != mReader) {
            try {
                mReader.close();
                mReader = null;
            } catch (IOException e) {
                ex = e;
            }
        }

        if (null != mControlSock) {
            try {
                mControlSock.close();
                mControlSock = null;
            } catch (IOException e) {
                ex = e;
            }
        }

        if (null != ex) {
            throw ex;
        }
    }

//發送命令到Server端
    public void writeCommand(String command) throws IOException {
        LogUtils.LOGI(TAG, "writeCommand ---> " + command);
        if (null == mWriter) {
            return;
        }

        try {
            mWriter.write(command + "\r\n");
            mWriter.flush();
        } catch (IOException ex) {
            throw new IOException(ex.getMessage());
        }
    }

//讀取Server端消息的線程
    Runnable mReadSocketRunnable = new Runnable() {

        @Override
        public void run() {
            try {
                while (mCanReadSocekt) {
                    // Thread.sleep(mReadInterval);
                    String result = SocketClient.getInstance().readLine();
                    if (null == result || result.length() <= 1)
                        continue;

                    dispatchResponseFromDV(result);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    };

IOS:

//調用此接口與socket鏈接
- (void)connect{
    if (DV_CONNECTION_CONNECTED == _connectStatus)
        return;
    
    CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"10.10.1.1", 8150, &_readStream, &_writeStream);
    
    inputStream = (NSInputStream *)_readStream; // ivar
    [inputStream setDelegate:self];
    [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [inputStream open];
    
    outputStream = (NSOutputStream *)_writeStream; // ivar
    [outputStream setDelegate:self];
    [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [outputStream open];
    _connectStatus = DV_CONNECTION_CONNECTING;
}

//調用此接口與socket斷開鏈接
- (void)disConnect{
    _connectStatus = DV_CONNECTION_DISCONNECTED;
    if (inputStream){
        [inputStream close];
        inputStream = nil;
    }
    
    if (outputStream){
        [outputStream close];
        outputStream = nil;
    }
    
    [self notifyDisConnected];
}

//獲取socket的鏈接狀態
- (int)connectStatus{
    return _connectStatus;
}

//註冊鏈接狀態的Delegate
- (void)registerDVConnectionChangedDelegate:(id<DVConnectionChangedDelegate>)delegate
{
    if (nil == _dvConnectionChangedDelegates || nil == delegate)
        return;
    
    if (DV_CONNECTION_CONNECTED == [self connectStatus])
        [delegate onDVConnected];
    else if (DV_CONNECTION_DISCONNECTED == [self connectStatus])
        [delegate onDVDisConnected];
    else if (DV_CONNECTION_CONNECT_FAILED == [self connectStatus])
        [delegate onConnectedFailed];
    
    [_dvConnectionChangedDelegates addObject:delegate];
}

//反註冊鏈接狀態的Delegate
- (void)unregisterDVConnectionChangedDelegate:(id<DVConnectionChangedDelegate>)delegate
{
    if (nil == _dvConnectionChangedDelegates || nil == delegate)
        return;
    
    [_dvConnectionChangedDelegates removeObject:delegate];
}

//發送命令給Server
- (BOOL)sendCommand:(NSString *)string {
    while (true) {
        if ([outputStream hasSpaceAvailable]){
            NSData *data = [[NSData alloc] initWithData:[string dataUsingEncoding:NSASCIIStringEncoding]];
            [outputStream write:[data bytes] maxLength:[data length]];
            NSLog(@"write command to dv: %@", string);
            return YES;
        }
    }
    
    return NO;
}

//Socket回調，能夠知道Socket的鏈接狀態，收到Server端發來的數據等
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent {
    switch (streamEvent) {
        case NSStreamEventNone:
            [self notifyConnectedFailed];
            NSLog(@"can not connect to socket");
            break;
        case NSStreamEventOpenCompleted:
            if (theStream == inputStream)
            {
                [self notifyConnected];
            }
            NSLog(@"Stream opened");
            break;
        case NSStreamEventHasSpaceAvailable: {
            break;
        }
        case NSStreamEventHasBytesAvailable:
            if (theStream == inputStream) {
                uint8_t buffer[1024];
                int len;
                
                while ([inputStream hasBytesAvailable]) {
                    len = [inputStream read:buffer maxLength:sizeof(buffer)];
                    
                    if (len > 0) {
                        //一行做位一次會話傳給外邊解析 Iterator buff.
                        uint8_t tmp_buffer[1024];
                        int tmp_buffer_start = 0;
                        for (int i = 0; i < len; ++i)
                        {
                            if ('\n' == buffer[i])
                            {
                                for (int j = tmp_buffer_start; j < i + 1; ++j)
                                {
                                    tmp_buffer[j - tmp_buffer_start] = buffer[j];
                                }
                                NSString *output = [[NSString alloc] initWithBytes:tmp_buffer length:(i - tmp_buffer_start + 1) encoding:NSASCIIStringEncoding];
                                
                                if (nil != output) {
                                    [self notifyNewMessage:output];
                                    NSLog(@"s: %@", output);
                                }
                                
                                [output release];
                                
                                memset(tmp_buffer, 0, sizeof(uint8_t) * 1024);
                                tmp_buffer_start = i + 1;
                            }
                        }
                    }
                }
                
            }
            break;
        case NSStreamEventErrorOccurred:
            NSLog(@"Can not connect to the host!");
//            [self notifyConnectedFailed];
            break;
        case NSStreamEventEndEncountered:
            NSLog(@"Closing stream...");
            [theStream close];
            [theStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
            [theStream release];
            theStream = nil;
            break;
        default:
            NSLog(@"Unknown event");
    }
}