iOS开发，使用SocketRocket库，Charles抓包分

项目中一直在用SocketRocket库做WebSocket的网络通信的基础库，但是其一直不支持代理抓包(最新版0.6.0已经支持,但由于为SDK项目，依赖的三方库也不能轻易升级，所以代理功能的实现依然要在0.5.1的基础上，最小限度得修改代码)，经过研究和对比发现，仅需添加几行代码，即可使其通信内容被Charles代理成功抓包，改动如下：

- (void)_initializeStreams;
{
    assert(_url.port.unsignedIntValue <= UINT32_MAX);
    uint32_t port = _url.port.unsignedIntValue;
    if (port == 0) {
        if (!_secure) {
            port = 80;
        } else {
            port = 443;
        }
    }
    NSString *host = _url.host;
    
    CFReadStreamRef readStream = NULL;
    CFWriteStreamRef writeStream = NULL;
    
    CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);
//在debug时，添加如下代码即可支持代理抓包
#if DEBUG
    CFDictionaryRef proxyDict = CFNetworkCopySystemProxySettings();
    CFMutableDictionaryRef socksConfig = CFDictionaryCreateMutableCopy(nil, 0, proxyDict);
    NSDictionary *dict = CFBridgingRelease(socksConfig);
    NSString *ip = [dict objectForKey:@"HTTPSProxy"];
    if (ip.length > 0) {
        NSDictionary *proxySocksConfig = @{@"SOCKSProxy": ip, @"SOCKSPort": @(8889), @"SOCKSEnable": @(true)};
        CFDictionaryRef config = CFBridgingRetain(proxySocksConfig);
        CFWriteStreamSetProperty(writeStream, kCFStreamPropertySOCKSProxy, config);
        CFReadStreamSetProperty(readStream, kCFStreamPropertySOCKSProxy, config);
        CFRelease(config);
    }
    CFRelease(proxyDict);
#endif        

    _outputStream = CFBridgingRelease(writeStream);
    _inputStream = CFBridgingRelease(readStream);
    
    _inputStream.delegate = self;
    _outputStream.delegate = self;
}

仅供有需要的朋友在Debug环境下开启抓包的能力
参考文章：https://stackoverflow.com/questions/33090087/how-to-inspect-websocket-traffic-with-charlesproxy-for-ios-simulator-devices