但是把伺服器配置成使用自己頒發的證書接受https連線後，客戶端也要做相應修改才能進行https連線.

以下是需要客戶端做的事情.

* iOS

  只需要修改WWWConnection.mm，就可以進行https連線.

//const char* WWWDelegateClassName 		= "UnityWWWConnectionSelfSignedCertDelegate";
const char* WWWDelegateClassName 		= "UnityWWWConnectionDelegate";

const char* WWWDelegateClassName 		= "UnityWWWConnectionSelfSignedCertDelegate";
//const char* WWWDelegateClassName 		= "UnityWWWConnectionDelegate";
 

* Android需要做更多的事情

把下面一大堆程式碼研究一下，就可以使用www，用ip進行https通訊了. 用域名更簡單

package com.netjoy.iblis;

import android.app.Activity;
import android.util.Log;

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManagerFactory;

/**
 * Created by cpeng on 6/21/16.
 */
public class SSLUtil {
    private static SSLUtil _instance;
    public static SSLUtil getInstance() {
        if (_instance == null) {
            _instance = new SSLUtil();
        }
        return _instance;
    }

    //see https://developer.android.com/training/articles/security-ssl.html
    public void trust(Activity activity) {
        String fileName = "";
        try {
            InputStream in = activity.getResources().getAssets().open("server.crt");
            int length = in.available();
            byte[] buffer = new byte[length];

            in.read(buffer);
            in.close();
            trust(buffer);
        }
        catch (java.io.IOException e) {
            e.printStackTrace();
        }
    }
    private void trust(byte[] crtFileContent)
    {
        try
        {
            // Load CAs from an InputStream
            CertificateFactory cf = CertificateFactory.getInstance("X.509");
            InputStream caInput = new BufferedInputStream(new ByteArrayInputStream(crtFileContent));
            Certificate ca;
            try {
                ca = cf.generateCertificate(caInput);
                Log.d("JavaSSLHelper", "ca=" + ((X509Certificate) ca).getSubjectDN());
                Log.d("JavaSSLHelper", "Certificate successfully created");
            } finally
            {
                caInput.close();
            }
            // Create a KeyStore containing our trusted CAs
            String keyStoreType = KeyStore.getDefaultType();
            KeyStore keyStore = KeyStore.getInstance(keyStoreType);
            keyStore.load(null, null);
            keyStore.setCertificateEntry("ca", ca);
            // Create a TrustManager that trusts the CAs in our KeyStore
            String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
            TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
            tmf.init(keyStore);
            try
            {
                // Create an SSLContext that uses our TrustManager
                SSLContext context = SSLContext.getInstance("TLS");
                context.init(null, tmf.getTrustManagers(), null);
                //this is important: unity will use the default ssl socket factory we just created
                HttpsURLConnection.setDefaultSSLSocketFactory(context.getSocketFactory());
                Log.d("JavaSSLHelper", "Default SSL Socket set.");
            } catch (NoSuchAlgorithmException e) {
                throw new RuntimeException(e);
            } catch (KeyManagementException e) {
                throw new RuntimeException(e);
            }
        }catch(Exception e)
        {
            throw new RuntimeException(e);
        }

        trustHostName();
    }

    public void trustHostName()
    {
        HostVerifier hostVerifier = new HostVerifier();
        HttpsURLConnection.setDefaultHostnameVerifier(hostVerifier);
    }

    public class HostVerifier implements HostnameVerifier {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            Log.i("SSLUtil", "HOST NAME " + hostname);
            return true;
//            if (hostname.contentEquals("192.168.2.243")) {
//                Log.i("SSLUtil", "Approving certificate for host " + hostname);
//                return true;
//            }
//            return false;
        }
    }
}