QQ浏览器 v12.2.3.7053版本的 MD5 值为：8285ab3059e5c8b521a264dfbc5c3685

以下内容为反编译后的 ConnectivityDetector.java 源代码，内容仅作参考

package com.tencent.common.connectivitydetect;

import com.tencent.basesupport.FLogger;
import com.tencent.common.http.Apn;
import com.tencent.mtt.miniprogram.util.log.UploadUtil;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.URL;

public class ConnectivityDetector {

    private static final byte[] f9199a = "9a6f75849b".getBytes();

    public static boolean a() {
        if (Apn.isNetworkConnected()) {
            return Apn.isWifiMode() ? b() : c();
        }
        return false;
    }

    private static boolean a(byte[] bArr, byte[] bArr2) {
        if (bArr == null && bArr2 == null) {
            return true;
        }
        if (bArr == null && bArr2 != null) {
            return false;
        }
        if ((bArr != null && bArr2 == null) || bArr.length != bArr2.length) {
            return false;
        }
        for (int i = 0; i < bArr.length; i++) {
            if (bArr[i] != bArr2[i]) {
                return false;
            }
        }
        return true;
    }

    public static boolean b() {
        HttpURLConnection httpURLConnection;
        InputStream inputStream = null;
        try {
            httpURLConnection = (HttpURLConnection) new URL("https://res.imtt.qq.com/qbprobe/netprobe.txt?t=" + System.currentTimeMillis()).openConnection();
            try {
                httpURLConnection.setInstanceFollowRedirects(false);
                httpURLConnection.setConnectTimeout(5000);
                httpURLConnection.setReadTimeout(5000);
                httpURLConnection.setUseCaches(false);
                httpURLConnection.setRequestMethod("POST");
                httpURLConnection.setRequestProperty("Connection", UploadUtil.CLOSE);
                httpURLConnection.setRequestProperty("Cache-Control", "no-cache");
                httpURLConnection.connect();
                InputStream inputStream2 = httpURLConnection.getInputStream();
                int responseCode = httpURLConnection.getResponseCode();
                FLogger.d("ConnectivityDetector", "checkNetworkConnectivity: HttpRsp code = " + responseCode);
                if (responseCode != 200) {
                    FLogger.d("ConnectivityDetector", "checkNetworkConnectivity: HttpRsp code not 200!!");
                    if (inputStream2 != null) {
                        try {
                            inputStream2.close();
                        } catch (Exception unused) {
                        }
                    }
                    if (httpURLConnection != null) {
                        try {
                            httpURLConnection.disconnect();
                        } catch (Exception unused2) {
                        }
                    }
                    return false;
                }
                byte[] bArr = new byte[f9199a.length];
                if (inputStream2.read(bArr) == bArr.length && a(bArr, f9199a)) {
                    FLogger.d("ConnectivityDetector", "checkNetworkConnectivity SUCC: buffer = " + new String(bArr));
                    if (inputStream2 != null) {
                        try {
                            inputStream2.close();
                        } catch (Exception unused3) {
                        }
                    }
                    if (httpURLConnection != null) {
                        try {
                            httpURLConnection.disconnect();
                        } catch (Exception unused4) {
                        }
                    }
                    return true;
                }
                FLogger.d("ConnectivityDetector", "checkNetworkConnectivity FAIL: buffer = " + new String(bArr));
                if (inputStream2 != null) {
                    try {
                        inputStream2.close();
                    } catch (Exception unused5) {
                    }
                }
                if (httpURLConnection != null) {
                    try {
                        httpURLConnection.disconnect();
                    } catch (Exception unused6) {
                    }
                }
                return false;
            } catch (Throwable unused7) {
                if (0 != 0) {
                    try {
                        inputStream.close();
                    } catch (Exception unused8) {
                    }
                }
                if (httpURLConnection != null) {
                    try {
                        httpURLConnection.disconnect();
                    } catch (Exception unused9) {
                    }
                }
                return false;
            }
        } catch (Throwable unused10) {
            httpURLConnection = null;
        }
    }

    public static boolean c() {
        try {
            Socket socket = new Socket();
            socket.connect(new InetSocketAddress("www.qq.com", 80), 5000);
            socket.close();
            return true;
        } catch (Throwable unused) {
            return false;
        }
    }
}