....

src/main/java/cn/com/qmth/examcloud/web/facepp/FaceppClient.java

@@ -21,6 +21,7 @@ import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
 
 import cn.com.qmth.examcloud.commons.exception.ExamCloudRuntimeException;
+import cn.com.qmth.examcloud.commons.exception.StatusException;
 import cn.com.qmth.examcloud.commons.helpers.JsonHttpResponseHolder;
 import cn.com.qmth.examcloud.commons.logging.ExamCloudLog;
 import cn.com.qmth.examcloud.commons.logging.ExamCloudLogFactory;
@@ -185,10 +186,22 @@ public class FaceppClient {
 		String imageBase64 = null;
 		try {
 			response = httpclient.execute(get);
+
+			if (HttpStatus.SC_OK != response.getStatusLine().getStatusCode()) {
+				throw new StatusException("601", "fail to download file. url=" + backupImageUrl);
+			}
+
 			byte[] byteArray = EntityUtils.toByteArray(response.getEntity());
+			if (100 > byteArray.length) {
+				throw new StatusException("602", "invalid image size. url=" + backupImageUrl);
+			}
+
 			imageBase64 = Base64.encodeBase64String(byteArray);
+
+		} catch (StatusException e) {
+			throw e;
 		} catch (Exception e) {
-			throw new ExamCloudRuntimeException(e);
+			throw new StatusException("603", "fail to download file. url=" + backupImageUrl, e);
 		} finally {
 			IOUtils.closeQuietly(response);
 		}