https Java SSLException protocol_version的問題解決方案

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 我們的業務代碼裡有需要用爬蟲爬取商品的圖片地址，然後在轉到我們的伺服器裡的過程，中間當然少不了下載圖片的過程，最近目標網站有些改變，就是之前http首碼的圖片地址部分改成了https，然後就造成了一個問題，圖片下載不了，查看log，發現一個java的SSLException.

異常是： java.lang.RuntimeException:Received fatal alert: protocol_version

異常的根源是：javax.net.ssl.SSLException:  Received fatal alert: protocol_version.

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原因是： https的請求需要加上ssl的驗證，但是代碼裡一般只用到http，即使用到https也只是換了個首碼，並沒有帶上ssl驗證的過程。

原始碼：

　　　　 private static final PoolingHttpClientConnectionManager HTTP_CLIENT_CONNECTION_MANAGER;private static final CloseableHttpClient HTTP_CLIENT;static {HTTP_CLIENT_CONNECTION_MANAGER = new PoolingHttpClientConnectionManager(RegistryBuilder.<ConnectionSocketFactory> create().register("http", PlainConnectionSocketFactory.getSocketFactory()).register("https", SSLConnectionSocketFactory.getSocketFactory()).build());HTTP_CLIENT_CONNECTION_MANAGER.setDefaultMaxPerRoute(100);HTTP_CLIENT_CONNECTION_MANAGER.setMaxTotal(200);RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(60000).setConnectTimeout(60000).setSocketTimeout(60000).build();HTTP_CLIENT = HttpClientBuilder.create().setConnectionManager(HTTP_CLIENT_CONNECTION_MANAGER).setDefaultRequestConfig(requestConfig).build();}

HttpGet httpGet = new HttpGet(url + (StringUtils.contains(url, "?") ? "&" : "?")

+ EntityUtils.toString(new UrlEncodedFormEntity(nameValuePairs, "UTF-8")));

 

CloseableHttpResponse httpResponse = HTTP_CLIENT.execute(httpGet);

　　

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 解決方案：加上SSL的驗證，加上協議

修改後可用的代碼：

private static final PoolingHttpClientConnectionManager HTTP_CLIENT_CONNECTION_MANAGER;private static final CloseableHttpClient HTTP_CLIENT;static {SSLContext ctx = SSLContexts.createSystemDefault();SSLConnectionSocketFactory fac =new SSLConnectionSocketFactory(ctx, new String[]{"SSLv2Hello", "TLSv1.2"}, null, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);HTTP_CLIENT_CONNECTION_MANAGER = new PoolingHttpClientConnectionManager(RegistryBuilder.<ConnectionSocketFactory> create().register("http", PlainConnectionSocketFactory.getSocketFactory()).register("https", fac).build());HTTP_CLIENT_CONNECTION_MANAGER.setDefaultMaxPerRoute(100);HTTP_CLIENT_CONNECTION_MANAGER.setMaxTotal(200);RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(60000).setConnectTimeout(60000).setSocketTimeout(60000).build();HTTP_CLIENT = HttpClientBuilder.create().setConnectionManager(HTTP_CLIENT_CONNECTION_MANAGER).setDefaultRequestConfig(requestConfig).build();}

HttpGet httpGet = new HttpGet(url + (StringUtils.contains(url, "?") ? "&" : "?")

+ EntityUtils.toString(new UrlEncodedFormEntity(nameValuePairs, "UTF-8")));

 

CloseableHttpResponse httpResponse = HTTP_CLIENT.execute(httpGet);

　　

希望能幫到你。。。

 

https Java SSLException protocol_version的問題解決方案