fix doesObjectExist

Author: baiyubin2020

src/main/java/com/aliyun/oss/OSS.java

@@ -584,7 +584,7 @@ public DeleteObjectsResult deleteObjects(DeleteObjectsRequest deleteObjectsReque
             throws OSSException, ClientException;
 
     /**
-     * 判断指定{@link Bucket}下是否存在指定的{@link OSSObject}。不受镜像/302跳转的影响。
+     * 判断指定{@link Bucket}下是否存在指定的{@link OSSObject}。不受镜像/302跳转或者其它跳转功能的影响。
      * @param bucketName 
      *             Bucket名称。
      * @param key
@@ -606,10 +606,10 @@ public boolean doesObjectExist(GenericRequest genericRequest)
             throws OSSException, ClientException;
 
     /**
-     * 判断Object是否存在，并指定是否受镜像/302跳转的影响。
+     * 判断Object是否存在，并指定是否受镜像/302等其它跳转的影响。
      * @param bucketName Bucket名称。
      * @param key Object Key。 
-     * @param isOnlyInOSS true 不受镜像/302跳转的影响，只检查Object是否在OSS中；
+     * @param isOnlyInOSS true 不受镜像/302等其它跳转的影响，只检查Object是否在OSS中；
      *              false 受镜像/302跳转的影响，如果OSS中不存在，会根据镜像/302的配置检查Object是否存在。
      * @return 如果存在返回true，不存在则返回false。
      */

src/main/java/com/aliyun/oss/OSSClient.java

@@ -615,7 +615,7 @@ public boolean doesObjectExist(String bucketName, String key, boolean isOnlyInOS
         if (isOnlyInOSS) {
             return doesObjectExist(bucketName, key);
         } else {
-            return doesObjectExistWithRedirect(bucketName, key);
+            return objectOperation.doesObjectExistWithRedirect(bucketName, key);
         }
     }
 
@@ -629,30 +629,7 @@ public boolean doesObjectExist(HeadObjectRequest headObjectRequest)
     @Override
     public boolean doesObjectExist(GenericRequest genericRequest)
             throws OSSException, ClientException {
-        try {
-            getSimplifiedObjectMeta(genericRequest);
-            return true;
-        } catch (OSSException e) {
-            if (e.getErrorCode().equals(OSSErrorCode.NO_SUCH_BUCKET)
-                    || e.getErrorCode().equals(OSSErrorCode.NO_SUCH_KEY)) {
-                return false;
-            }
-            throw e;
-        }
-    }
-    
-    private boolean doesObjectExistWithRedirect(String bucketName, String key) {
-        try {
-            HeadObjectRequest headObjectRequest = new HeadObjectRequest(bucketName, key);
-            this.objectOperation.headObject(headObjectRequest);
-            return true;
-        } catch (OSSException e) {
-            if (e.getErrorCode() == OSSErrorCode.NO_SUCH_BUCKET 
-                    || e.getErrorCode() == OSSErrorCode.NO_SUCH_KEY) {
-                return false;
-            }
-            throw e;
-        }
+        return objectOperation.doesObjectExist(genericRequest);
     }
 
     @Override

src/main/java/com/aliyun/oss/internal/OSSObjectOperation.java

@@ -730,6 +730,44 @@ public GenericResult processObject(ProcessObjectRequest processObjectRequest)
 
         return doOperation(request, ResponseParsers.processObjectResponseParser, bucketName, key, true);
     }
+    
+    public boolean doesObjectExist(GenericRequest genericRequest)
+            throws OSSException, ClientException {
+        try {
+            this.getSimplifiedObjectMeta(genericRequest);
+            return true;
+        } catch (OSSException e) {
+            if (e.getErrorCode().equals(OSSErrorCode.NO_SUCH_BUCKET)
+                    || e.getErrorCode().equals(OSSErrorCode.NO_SUCH_KEY)) {
+                return false;
+            }
+            throw e;
+        }
+    }
+    
+    public boolean doesObjectExistWithRedirect(String bucketName, String key) 
+            throws OSSException, ClientException {
+        OSSObject ossObject = null;
+        try {
+            GetObjectRequest getObjectRequest = new GetObjectRequest(bucketName, key);
+            ossObject = this.getObject(getObjectRequest);
+            return true;
+        } catch (OSSException e) {
+            if (e.getErrorCode() == OSSErrorCode.NO_SUCH_BUCKET 
+                    || e.getErrorCode() == OSSErrorCode.NO_SUCH_KEY) {
+                return false;
+            }
+            throw e;
+        } finally {
+            if (ossObject != null) {
+                try {
+                    ossObject.forcedClose();
+                } catch (IOException e) {
+                    logException("Forced close failed: ", e);
+                }
+            }
+        }
+    }
 
     private static enum MetadataDirective {