http和https连接下载

时间：2025-02-15 07:20:52
给一个可以下载的http地址和https地址，分别用不同的方式来下载，https需要SSL证书，
另外呢，http和https如何转换? 不要用https来访问http 
解决了蛮久的，最后发现是网络原因，外网连接不上，所以联调的时候，用内网和外网分别请求，先排除网络原因.
(为啥没想到断开网络用外网连接请求呢?感觉思路啊,还是得多训练这种思维和处理问题的方式)

/**
 * 获取网络图片流
 *
 * @param url
 * @return
 */
public static byte[] getNetWorkStream(String url) {
    HttpURLConnection connection=null;
    try {
        connection = (HttpURLConnection) new URL(url).openConnection();
        (5000);
        (5000);
        ("GET");
        if (() == HttpURLConnection.HTTP_OK) {
            InputStream inputStream = ();
            byte[] bytes= (inputStream);
            ();
            return bytes;
        }
    } catch (IOException e) {
        ("获取网络图片出现异常，图片路径为：" ,e);
    }finally {
        if(connection!=null){
            ();
        }
    }
    return null;
}



/**
 * 获取网络图片流头部的文件名后缀
 * resultMap: key[fileName、bytes]
 * @param url
 * @return
 */
public static Map<String,Object> getNetWorkStreamAndFileName(String url) {
    HttpURLConnection connection=null;
    int responseCode = -100 ;
    Map resultMap = new HashMap();
    try {
        connection = (HttpURLConnection) new URL(url).openConnection();
        (5000);
        (5000);
        ("GET");
        responseCode = () ;
        if (responseCode == HttpURLConnection.HTTP_OK) {
            String  fileName = ("Content-Disposition");
            if(fileName != null){
                fileName = new String(("ISO-8859-1"),"GBK").split("=")[1];
            }
            InputStream inputStream = ();
            byte[] bytes= (inputStream);
            if((fileName)){
                fileName=(("/")+1);
            }
            ("fileName",fileName);
            ("bytes",bytes);
            ();
            return resultMap;
        }
    } catch (IOException e) {
        ("获取网络文件出现异常，网络路径为：" ,e);
    }finally {
        ("请求连接的返回的响应码ResponseCode："+responseCode);
        if(connection!=null){
            ();
        }
    }
    return null;
}

/**
 * 获取网络图片流
 *
 * @param url
 * @return
 */
public static byte[] getNetWorkStreamHttps(String url) throws IOException, NoSuchProviderException, NoSuchAlgorithmException {
    SSLContext sslcontext = ("SSL","SunJSSE");
    try {
        (null, new TrustManager[]{new MyX509TrustManager()}, new ());
    } catch (KeyManagementException e) {
        ();
    }
    HostnameVerifier ignoreHostnameVerifier = new HostnameVerifier() {
        @Override
        public boolean verify(String s, SSLSession sslsession) {
            ("WARNING: Hostname is not matched for cert.");
            return true;
        }
    };
    URL myURL = new URL(url);
    // 创建HttpsURLConnection对象，并设置其SSLSocketFactory对象
    HttpsURLConnection connection = (HttpsURLConnection) ();
    (());
    (ignoreHostnameVerifier);
    try {
        (5000);
        (5000);
        ("GET");
        if (() == HttpURLConnection.HTTP_OK) {
            InputStream inputStream = ();
            byte[] bytes= (inputStream);
            ();
            return bytes;
        }
    } catch (IOException e) {
        ("获取网络图片出现异常，图片路径为：" ,e);
    }finally {
        if(connection!=null){
            ();
        }
    }
    return null;
}

/**
 * 获取网络图片流头部的文件名后缀
 * resultMap: key[fileName、bytes]
 * @param url
 * @return
 */
public static Map<String,Object> getNetWorkStreamAndUrlFileName(String url) throws IOException, NoSuchProviderException, NoSuchAlgorithmException {
    SSLContext sslcontext = ("SSL","SunJSSE");
    try {
        (null, new TrustManager[]{new MyX509TrustManager()}, new ());
    } catch (KeyManagementException e) {
        ();
    }
    HostnameVerifier ignoreHostnameVerifier = new HostnameVerifier() {
        @Override
        public boolean verify(String s, SSLSession sslsession) {
            ("WARNING: Hostname is not matched for cert.");
            return true;
        }
    };
    URL myURL = new URL(url);
    // 创建HttpsURLConnection对象，并设置其SSLSocketFactory对象
    HttpsURLConnection connection = (HttpsURLConnection) ();
    (());
    (ignoreHostnameVerifier);
    //之后任何Https协议网站皆能正常访问，同第一种情况
    //HttpURLConnection connection=null;
    int responseCode = -100 ;
    Map resultMap = new HashMap();
    try {
        //connection = (HttpURLConnection) new URL(url).openConnection();
        (5000);
        (5000);
        ("GET");
        responseCode = () ;
        if (responseCode == HttpURLConnection.HTTP_OK) {
            String  fileName = ("Content-Disposition");
            if(fileName != null){
                fileName = new String(("ISO-8859-1"),"GBK").split("=")[1];
            }
            InputStream inputStream = ();
            byte[] bytes= (inputStream);
            if((fileName)){
                fileName=(("/")+1);
            }
            ("fileName",fileName);
            ("bytes",bytes);
            ();
            return resultMap;
        }
    } catch (IOException e) {
        ("获取网络文件出现异常，网络路径为：" ,e);
    }finally {
        ("请求连接的返回的响应码ResponseCode："+responseCode);
        if(connection!=null){
            ();
        }
    }
    return null;
}


public static void main(String[] args) throws NoSuchProviderException, NoSuchAlgorithmException, IOException {
    String url = "";
    byte[] a = (url);
    (a);
}



public class MyX509TrustManager implements X509TrustManager {

    @Override
    public void checkClientTrusted(X509Certificate certificates[],String authType) throws CertificateException {
    }

    @Override
    public void checkServerTrusted(X509Certificate[] ax509certificate,String s) throws CertificateException {
    }

    @Override
    public X509Certificate[] getAcceptedIssuers() {
        // TODO Auto-generated method stub
        return null;
    }
}

还是连接超时，最后找到问题根源是因为信息安全做了域名限制策略，只能用域名访问而不能用ip，但是银行方用的是ip访问所以连接不上

这种问题要找到运维和信息安全处理，了解行方访问方式是用ip的，

通过断开网络和连接网络来反复测试，telnet ip 端口不行，telnet 域名 端口可以，

ok 解决了~

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