diff --git a/src/main/java/org/codelibs/fess/api/es/EsApiManager.java b/src/main/java/org/codelibs/fess/api/es/EsApiManager.java
index 97df945a1..ba0585006 100644
--- a/src/main/java/org/codelibs/fess/api/es/EsApiManager.java
+++ b/src/main/java/org/codelibs/fess/api/es/EsApiManager.java
@@ -137,7 +137,7 @@ public class EsApiManager extends BaseApiManager {
                 curlRequest.param(entry.getKey(), entry.getValue()[0]);
             }
         });
-        final CurlResponse curlResponse = curlRequest.onConnect((req, con) -> {
+        try (final CurlResponse curlResponse = curlRequest.onConnect((req, con) -> {
             con.setDoOutput(true);
             if (httpMethod != Method.GET) {
                 try (ServletInputStream in = request.getInputStream(); OutputStream out = con.getOutputStream()) {
@@ -146,13 +146,14 @@ public class EsApiManager extends BaseApiManager {
                     throw new WebApiException(HttpServletResponse.SC_BAD_REQUEST, e);
                 }
             }
-        }).execute();
+        }).execute()) {
 
-        try (ServletOutputStream out = response.getOutputStream(); InputStream in = curlResponse.getContentAsStream()) {
-            response.setStatus(curlResponse.getHttpStatusCode());
-            CopyUtil.copy(in, out);
-        } catch (final ClientAbortException e) {
-            logger.debug("Client aborts this request.", e);
+            try (ServletOutputStream out = response.getOutputStream(); InputStream in = curlResponse.getContentAsStream()) {
+                response.setStatus(curlResponse.getHttpStatusCode());
+                CopyUtil.copy(in, out);
+            } catch (final ClientAbortException e) {
+                logger.debug("Client aborts this request.", e);
+            }
         } catch (final Exception e) {
             if (e.getCause() instanceof ClientAbortException) {
                 logger.debug("Client aborts this request.", e);
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dict/kuromoji/AdminDictKuromojiAction.java b/src/main/java/org/codelibs/fess/app/web/admin/dict/kuromoji/AdminDictKuromojiAction.java
index 841fe5beb..db486242e 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dict/kuromoji/AdminDictKuromojiAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dict/kuromoji/AdminDictKuromojiAction.java
@@ -214,9 +214,7 @@ public class AdminDictKuromojiAction extends FessAdminAction {
         verifyTokenKeep(() -> downloadpage(form.dictId));
         return kuromojiService.getKuromojiFile(form.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationError(messages -> messages.addErrorsFailedToDownloadKuromojiFile(GLOBAL), () -> downloadpage(form.dictId));
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dict/mapping/AdminDictMappingAction.java b/src/main/java/org/codelibs/fess/app/web/admin/dict/mapping/AdminDictMappingAction.java
index f4f06b337..6b2973e42 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dict/mapping/AdminDictMappingAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dict/mapping/AdminDictMappingAction.java
@@ -217,9 +217,7 @@ public class AdminDictMappingAction extends FessAdminAction {
         verifyTokenKeep(() -> downloadpage(form.dictId));
         return charMappingService.getCharMappingFile(form.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationError(messages -> messages.addErrorsFailedToDownloadMappingFile(GLOBAL), () -> downloadpage(form.dictId));
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dict/protwords/AdminDictProtwordsAction.java b/src/main/java/org/codelibs/fess/app/web/admin/dict/protwords/AdminDictProtwordsAction.java
index f4b1d9569..07f1ef1a6 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dict/protwords/AdminDictProtwordsAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dict/protwords/AdminDictProtwordsAction.java
@@ -212,9 +212,7 @@ public class AdminDictProtwordsAction extends FessAdminAction {
         verifyTokenKeep(() -> downloadpage(form.dictId));
         return protwordsService.getProtwordsFile(form.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationError(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL), () -> downloadpage(form.dictId));
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dict/stemmeroverride/AdminDictStemmeroverrideAction.java b/src/main/java/org/codelibs/fess/app/web/admin/dict/stemmeroverride/AdminDictStemmeroverrideAction.java
index 45dee5a2d..9574b650e 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dict/stemmeroverride/AdminDictStemmeroverrideAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dict/stemmeroverride/AdminDictStemmeroverrideAction.java
@@ -217,9 +217,7 @@ public class AdminDictStemmeroverrideAction extends FessAdminAction {
                 .getStemmerOverrideFile(form.dictId)
                 .map(file -> {
                     return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                        try (InputStream inputStream = file.getInputStream()) {
-                            out.write(inputStream);
-                        }
+                        file.writeOut(out);
                     });
                 })
                 .orElseGet(
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dict/stopwords/AdminDictStopwordsAction.java b/src/main/java/org/codelibs/fess/app/web/admin/dict/stopwords/AdminDictStopwordsAction.java
index ea8129927..d2b7921d5 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dict/stopwords/AdminDictStopwordsAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dict/stopwords/AdminDictStopwordsAction.java
@@ -210,9 +210,7 @@ public class AdminDictStopwordsAction extends FessAdminAction {
         verifyTokenKeep(() -> downloadpage(form.dictId));
         return stopwordsService.getStopwordsFile(form.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationError(messages -> messages.addErrorsFailedToDownloadStopwordsFile(GLOBAL), () -> downloadpage(form.dictId));
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/dict/synonym/AdminDictSynonymAction.java b/src/main/java/org/codelibs/fess/app/web/admin/dict/synonym/AdminDictSynonymAction.java
index c828b3591..65236f61f 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/dict/synonym/AdminDictSynonymAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/dict/synonym/AdminDictSynonymAction.java
@@ -217,9 +217,7 @@ public class AdminDictSynonymAction extends FessAdminAction {
         verifyTokenKeep(() -> downloadpage(form.dictId));
         return synonymService.getSynonymFile(form.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationError(messages -> messages.addErrorsFailedToDownloadSynonymFile(GLOBAL), () -> downloadpage(form.dictId));
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/kuromoji/ApiAdminDictKuromojiAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/kuromoji/ApiAdminDictKuromojiAction.java
index 00ed9e476..69ae86112 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/kuromoji/ApiAdminDictKuromojiAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/kuromoji/ApiAdminDictKuromojiAction.java
@@ -136,9 +136,7 @@ public class ApiAdminDictKuromojiAction extends FessApiAdminAction {
         validateApi(body, messages -> {});
         return kuromojiService.getKuromojiFile(body.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/mapping/ApiAdminDictMappingAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/mapping/ApiAdminDictMappingAction.java
index f39a99262..c28c26f99 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/mapping/ApiAdminDictMappingAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/mapping/ApiAdminDictMappingAction.java
@@ -136,9 +136,7 @@ public class ApiAdminDictMappingAction extends FessApiAdminAction {
         validateApi(body, messages -> {});
         return charMappingService.getCharMappingFile(body.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/protwords/ApiAdminDictProtwordsAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/protwords/ApiAdminDictProtwordsAction.java
index dbed72074..a2b1992ff 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/protwords/ApiAdminDictProtwordsAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/protwords/ApiAdminDictProtwordsAction.java
@@ -135,9 +135,7 @@ public class ApiAdminDictProtwordsAction extends FessApiAdminAction {
         validateApi(body, messages -> {});
         return protwordsService.getProtwordsFile(body.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stemmeroverride/ApiAdminDictStemmeroverrideAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stemmeroverride/ApiAdminDictStemmeroverrideAction.java
index 93aae8408..1b1ceec76 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stemmeroverride/ApiAdminDictStemmeroverrideAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stemmeroverride/ApiAdminDictStemmeroverrideAction.java
@@ -142,9 +142,7 @@ public class ApiAdminDictStemmeroverrideAction extends FessApiAdminAction {
         validateApi(body, messages -> {});
         return stemmerOverrideService.getStemmerOverrideFile(body.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stopwords/ApiAdminDictStopwordsAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stopwords/ApiAdminDictStopwordsAction.java
index 0cdc344dc..2c5878167 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stopwords/ApiAdminDictStopwordsAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/stopwords/ApiAdminDictStopwordsAction.java
@@ -135,9 +135,7 @@ public class ApiAdminDictStopwordsAction extends FessApiAdminAction {
         validateApi(body, messages -> {});
         return stopwordsService.getStopwordsFile(body.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadStopwordsFile(GLOBAL));
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/synonym/ApiAdminDictSynonymAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/synonym/ApiAdminDictSynonymAction.java
index 3e6a95416..1e8dfb089 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/dict/synonym/ApiAdminDictSynonymAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/dict/synonym/ApiAdminDictSynonymAction.java
@@ -136,9 +136,7 @@ public class ApiAdminDictSynonymAction extends FessApiAdminAction {
         validateApi(body, messages -> {});
         return synonymService.getSynonymFile(body.dictId).map(file -> {
             return asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
-                try (InputStream inputStream = file.getInputStream()) {
-                    out.write(inputStream);
-                }
+                file.writeOut(out);
             });
         }).orElseGet(() -> {
             throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));
diff --git a/src/main/java/org/codelibs/fess/dict/DictionaryFile.java b/src/main/java/org/codelibs/fess/dict/DictionaryFile.java
index 1d5910a93..5c0c18e2c 100644
--- a/src/main/java/org/codelibs/fess/dict/DictionaryFile.java
+++ b/src/main/java/org/codelibs/fess/dict/DictionaryFile.java
@@ -15,6 +15,9 @@
  */
 package org.codelibs.fess.dict;
 
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Date;
@@ -22,7 +25,9 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
 
+import org.codelibs.curl.CurlResponse;
 import org.dbflute.optional.OptionalEntity;
+import org.lastaflute.web.servlet.request.stream.WrittenStreamOut;
 
 public abstract class DictionaryFile<T extends DictionaryItem> {
     protected DictionaryManager dictionaryManager;
@@ -56,6 +61,13 @@ public abstract class DictionaryFile<T extends DictionaryItem> {
         return this;
     }
 
+    public void writeOut(WrittenStreamOut out) throws IOException {
+        try (final CurlResponse curlResponse = dictionaryManager.getContentResponse(this);
+                final InputStream inputStream = new BufferedInputStream(curlResponse.getContentAsStream())) {
+            out.write(inputStream);
+        }
+    }
+
     public abstract String getType();
 
     public abstract PagingList<T> selectList(int offset, int size);
diff --git a/src/main/java/org/codelibs/fess/dict/DictionaryManager.java b/src/main/java/org/codelibs/fess/dict/DictionaryManager.java
index e6a3fffe6..4a7003886 100644
--- a/src/main/java/org/codelibs/fess/dict/DictionaryManager.java
+++ b/src/main/java/org/codelibs/fess/dict/DictionaryManager.java
@@ -17,7 +17,6 @@ package org.codelibs.fess.dict;
 
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
@@ -110,12 +109,8 @@ public class DictionaryManager {
         });
     }
 
-    public InputStream getContentInputStream(final DictionaryFile<? extends DictionaryItem> dictFile) {
-        try {
-            return ComponentUtil.getCurlHelper().get("/_configsync/file").param("path", dictFile.getPath()).execute().getContentAsStream();
-        } catch (final IOException e) {
-            throw new DictionaryException("Failed to access " + dictFile.getPath(), e);
-        }
+    public CurlResponse getContentResponse(final DictionaryFile<? extends DictionaryItem> dictFile) {
+        return ComponentUtil.getCurlHelper().get("/_configsync/file").param("path", dictFile.getPath()).execute();
     }
 
     public void addCreator(final DictionaryCreator creator) {
diff --git a/src/main/java/org/codelibs/fess/dict/kuromoji/KuromojiFile.java b/src/main/java/org/codelibs/fess/dict/kuromoji/KuromojiFile.java
index db5c94426..769db4d12 100644
--- a/src/main/java/org/codelibs/fess/dict/kuromoji/KuromojiFile.java
+++ b/src/main/java/org/codelibs/fess/dict/kuromoji/KuromojiFile.java
@@ -15,7 +15,6 @@
  */
 package org.codelibs.fess.dict.kuromoji;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.Closeable;
@@ -33,6 +32,7 @@ import java.util.List;
 
 import org.codelibs.core.io.CloseableUtil;
 import org.codelibs.core.lang.StringUtil;
+import org.codelibs.curl.CurlResponse;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.dict.DictionaryException;
 import org.codelibs.fess.dict.DictionaryFile;
@@ -61,7 +61,7 @@ public class KuromojiFile extends DictionaryFile<KuromojiItem> {
     @Override
     public synchronized OptionalEntity<KuromojiItem> get(final long id) {
         if (kuromojiItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         for (final KuromojiItem kuromojiItem : kuromojiItemList) {
@@ -75,7 +75,7 @@ public class KuromojiFile extends DictionaryFile<KuromojiItem> {
     @Override
     public synchronized PagingList<KuromojiItem> selectList(final int offset, final int size) {
         if (kuromojiItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         if (offset >= kuromojiItemList.size() || offset < 0) {
@@ -93,14 +93,14 @@ public class KuromojiFile extends DictionaryFile<KuromojiItem> {
     @Override
     public synchronized void insert(final KuromojiItem item) {
         try (KuromojiUpdater updater = new KuromojiUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
     @Override
     public synchronized void update(final KuromojiItem item) {
         try (KuromojiUpdater updater = new KuromojiUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
@@ -109,14 +109,21 @@ public class KuromojiFile extends DictionaryFile<KuromojiItem> {
         final KuromojiItem kuromojiItem = item;
         kuromojiItem.setNewToken(StringUtil.EMPTY);
         try (KuromojiUpdater updater = new KuromojiUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
+        }
+    }
+
+    protected void reload(final KuromojiUpdater updater) {
+        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
+            reload(updater, curlResponse.getContentAsStream());
+        } catch (final IOException e) {
+            throw new DictionaryException("Failed to parse " + path, e);
         }
     }
 
     protected void reload(final KuromojiUpdater updater, final InputStream in) {
         final List<KuromojiItem> itemList = new ArrayList<>();
-        try (BufferedReader reader =
-                new BufferedReader(new InputStreamReader(in != null ? in : dictionaryManager.getContentInputStream(this), Constants.UTF_8))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
             long id = 0;
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -178,10 +185,6 @@ public class KuromojiFile extends DictionaryFile<KuromojiItem> {
         return new File(path).getName();
     }
 
-    public InputStream getInputStream() throws IOException {
-        return new BufferedInputStream(dictionaryManager.getContentInputStream(this));
-    }
-
     public synchronized void update(final InputStream in) throws IOException {
         try (KuromojiUpdater updater = new KuromojiUpdater(null)) {
             reload(updater, in);
diff --git a/src/main/java/org/codelibs/fess/dict/mapping/CharMappingFile.java b/src/main/java/org/codelibs/fess/dict/mapping/CharMappingFile.java
index ee590a26d..9cc77e7d8 100644
--- a/src/main/java/org/codelibs/fess/dict/mapping/CharMappingFile.java
+++ b/src/main/java/org/codelibs/fess/dict/mapping/CharMappingFile.java
@@ -15,7 +15,6 @@
  */
 package org.codelibs.fess.dict.mapping;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.Closeable;
@@ -35,6 +34,7 @@ import java.util.regex.Pattern;
 
 import org.codelibs.core.io.CloseableUtil;
 import org.codelibs.core.lang.StringUtil;
+import org.codelibs.curl.CurlResponse;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.dict.DictionaryException;
 import org.codelibs.fess.dict.DictionaryFile;
@@ -66,7 +66,7 @@ public class CharMappingFile extends DictionaryFile<CharMappingItem> {
     @Override
     public OptionalEntity<CharMappingItem> get(final long id) {
         if (mappingItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         for (final CharMappingItem mappingItem : mappingItemList) {
@@ -80,7 +80,7 @@ public class CharMappingFile extends DictionaryFile<CharMappingItem> {
     @Override
     public synchronized PagingList<CharMappingItem> selectList(final int offset, final int size) {
         if (mappingItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         if (offset >= mappingItemList.size() || offset < 0) {
@@ -98,14 +98,14 @@ public class CharMappingFile extends DictionaryFile<CharMappingItem> {
     @Override
     public synchronized void insert(final CharMappingItem item) {
         try (MappingUpdater updater = new MappingUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
     @Override
     public synchronized void update(final CharMappingItem item) {
         try (MappingUpdater updater = new MappingUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
@@ -115,15 +115,22 @@ public class CharMappingFile extends DictionaryFile<CharMappingItem> {
         mappingItem.setNewInputs(StringUtil.EMPTY_STRINGS);
         mappingItem.setNewOutput(StringUtil.EMPTY);
         try (MappingUpdater updater = new MappingUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
+        }
+    }
+
+    protected void reload(final MappingUpdater updater) {
+        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
+            reload(updater, curlResponse.getContentAsStream());
+        } catch (final IOException e) {
+            throw new DictionaryException("Failed to parse " + path, e);
         }
     }
 
     protected void reload(final MappingUpdater updater, final InputStream in) {
         final Pattern parsePattern = Pattern.compile("(.*)\\s*=>\\s*(.*)\\s*$");
         final List<CharMappingItem> itemList = new ArrayList<>();
-        try (BufferedReader reader =
-                new BufferedReader(new InputStreamReader(in != null ? in : dictionaryManager.getContentInputStream(this), Constants.UTF_8))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
             long id = 0;
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -192,10 +199,6 @@ public class CharMappingFile extends DictionaryFile<CharMappingItem> {
         return new File(path).getName();
     }
 
-    public InputStream getInputStream() throws IOException {
-        return new BufferedInputStream(dictionaryManager.getContentInputStream(this));
-    }
-
     public synchronized void update(final InputStream in) throws IOException {
         try (MappingUpdater updater = new MappingUpdater(null)) {
             reload(updater, in);
diff --git a/src/main/java/org/codelibs/fess/dict/protwords/ProtwordsFile.java b/src/main/java/org/codelibs/fess/dict/protwords/ProtwordsFile.java
index 98245b24d..eb3b33c2f 100644
--- a/src/main/java/org/codelibs/fess/dict/protwords/ProtwordsFile.java
+++ b/src/main/java/org/codelibs/fess/dict/protwords/ProtwordsFile.java
@@ -15,7 +15,6 @@
  */
 package org.codelibs.fess.dict.protwords;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.Closeable;
@@ -33,6 +32,7 @@ import java.util.List;
 
 import org.codelibs.core.io.CloseableUtil;
 import org.codelibs.core.lang.StringUtil;
+import org.codelibs.curl.CurlResponse;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.dict.DictionaryException;
 import org.codelibs.fess.dict.DictionaryFile;
@@ -60,7 +60,7 @@ public class ProtwordsFile extends DictionaryFile<ProtwordsItem> {
     @Override
     public synchronized OptionalEntity<ProtwordsItem> get(final long id) {
         if (protwordsItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         for (final ProtwordsItem ProtwordsItem : protwordsItemList) {
@@ -74,7 +74,7 @@ public class ProtwordsFile extends DictionaryFile<ProtwordsItem> {
     @Override
     public synchronized PagingList<ProtwordsItem> selectList(final int offset, final int size) {
         if (protwordsItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         if (offset >= protwordsItemList.size() || offset < 0) {
@@ -92,14 +92,14 @@ public class ProtwordsFile extends DictionaryFile<ProtwordsItem> {
     @Override
     public synchronized void insert(final ProtwordsItem item) {
         try (ProtwordsUpdater updater = new ProtwordsUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
     @Override
     public synchronized void update(final ProtwordsItem item) {
         try (ProtwordsUpdater updater = new ProtwordsUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
@@ -108,14 +108,21 @@ public class ProtwordsFile extends DictionaryFile<ProtwordsItem> {
         final ProtwordsItem ProtwordsItem = item;
         ProtwordsItem.setNewInput(StringUtil.EMPTY);
         try (ProtwordsUpdater updater = new ProtwordsUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
+        }
+    }
+
+    protected void reload(final ProtwordsUpdater updater) {
+        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
+            reload(updater, curlResponse.getContentAsStream());
+        } catch (final IOException e) {
+            throw new DictionaryException("Failed to parse " + path, e);
         }
     }
 
     protected void reload(final ProtwordsUpdater updater, final InputStream in) {
         final List<ProtwordsItem> itemList = new ArrayList<>();
-        try (BufferedReader reader =
-                new BufferedReader(new InputStreamReader(in != null ? in : dictionaryManager.getContentInputStream(this), Constants.UTF_8))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
             long id = 0;
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -179,10 +186,6 @@ public class ProtwordsFile extends DictionaryFile<ProtwordsItem> {
         return new File(path).getName();
     }
 
-    public InputStream getInputStream() throws IOException {
-        return new BufferedInputStream(dictionaryManager.getContentInputStream(this));
-    }
-
     public synchronized void update(final InputStream in) throws IOException {
         try (ProtwordsUpdater updater = new ProtwordsUpdater(null)) {
             reload(updater, in);
diff --git a/src/main/java/org/codelibs/fess/dict/stemmeroverride/StemmerOverrideFile.java b/src/main/java/org/codelibs/fess/dict/stemmeroverride/StemmerOverrideFile.java
index 2b7ced842..7931740a6 100644
--- a/src/main/java/org/codelibs/fess/dict/stemmeroverride/StemmerOverrideFile.java
+++ b/src/main/java/org/codelibs/fess/dict/stemmeroverride/StemmerOverrideFile.java
@@ -15,7 +15,6 @@
  */
 package org.codelibs.fess.dict.stemmeroverride;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.Closeable;
@@ -35,6 +34,7 @@ import java.util.regex.Pattern;
 
 import org.codelibs.core.io.CloseableUtil;
 import org.codelibs.core.lang.StringUtil;
+import org.codelibs.curl.CurlResponse;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.dict.DictionaryException;
 import org.codelibs.fess.dict.DictionaryFile;
@@ -66,7 +66,7 @@ public class StemmerOverrideFile extends DictionaryFile<StemmerOverrideItem> {
     @Override
     public synchronized OptionalEntity<StemmerOverrideItem> get(final long id) {
         if (stemmerOverrideItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         for (final StemmerOverrideItem stemmerOverrideItem : stemmerOverrideItemList) {
@@ -80,7 +80,7 @@ public class StemmerOverrideFile extends DictionaryFile<StemmerOverrideItem> {
     @Override
     public synchronized PagingList<StemmerOverrideItem> selectList(final int offset, final int size) {
         if (stemmerOverrideItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         if (offset >= stemmerOverrideItemList.size() || offset < 0) {
@@ -98,14 +98,14 @@ public class StemmerOverrideFile extends DictionaryFile<StemmerOverrideItem> {
     @Override
     public synchronized void insert(final StemmerOverrideItem item) {
         try (StemmerOverrideUpdater updater = new StemmerOverrideUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
     @Override
     public synchronized void update(final StemmerOverrideItem item) {
         try (StemmerOverrideUpdater updater = new StemmerOverrideUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
@@ -115,15 +115,22 @@ public class StemmerOverrideFile extends DictionaryFile<StemmerOverrideItem> {
         stemmerOverrideItem.setNewInput(StringUtil.EMPTY);
         stemmerOverrideItem.setNewOutput(StringUtil.EMPTY);
         try (StemmerOverrideUpdater updater = new StemmerOverrideUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
+        }
+    }
+
+    protected void reload(final StemmerOverrideUpdater updater) {
+        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
+            reload(updater, curlResponse.getContentAsStream());
+        } catch (final IOException e) {
+            throw new DictionaryException("Failed to parse " + path, e);
         }
     }
 
     protected void reload(final StemmerOverrideUpdater updater, final InputStream in) {
         final Pattern parsePattern = Pattern.compile("(.*)\\s*=>\\s*(.*)\\s*$");
         final List<StemmerOverrideItem> itemList = new ArrayList<>();
-        try (BufferedReader reader =
-                new BufferedReader(new InputStreamReader(in != null ? in : dictionaryManager.getContentInputStream(this), Constants.UTF_8))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
             long id = 0;
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -189,10 +196,6 @@ public class StemmerOverrideFile extends DictionaryFile<StemmerOverrideItem> {
         return new File(path).getName();
     }
 
-    public InputStream getInputStream() throws IOException {
-        return new BufferedInputStream(dictionaryManager.getContentInputStream(this));
-    }
-
     public synchronized void update(final InputStream in) throws IOException {
         try (StemmerOverrideUpdater updater = new StemmerOverrideUpdater(null)) {
             reload(updater, in);
diff --git a/src/main/java/org/codelibs/fess/dict/stopwords/StopwordsFile.java b/src/main/java/org/codelibs/fess/dict/stopwords/StopwordsFile.java
index 4fc738b7c..30b2ce2e7 100644
--- a/src/main/java/org/codelibs/fess/dict/stopwords/StopwordsFile.java
+++ b/src/main/java/org/codelibs/fess/dict/stopwords/StopwordsFile.java
@@ -15,7 +15,6 @@
  */
 package org.codelibs.fess.dict.stopwords;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.Closeable;
@@ -33,6 +32,7 @@ import java.util.List;
 
 import org.codelibs.core.io.CloseableUtil;
 import org.codelibs.core.lang.StringUtil;
+import org.codelibs.curl.CurlResponse;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.dict.DictionaryException;
 import org.codelibs.fess.dict.DictionaryFile;
@@ -60,7 +60,7 @@ public class StopwordsFile extends DictionaryFile<StopwordsItem> {
     @Override
     public synchronized OptionalEntity<StopwordsItem> get(final long id) {
         if (stopwordsItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         for (final StopwordsItem StopwordsItem : stopwordsItemList) {
@@ -74,7 +74,7 @@ public class StopwordsFile extends DictionaryFile<StopwordsItem> {
     @Override
     public synchronized PagingList<StopwordsItem> selectList(final int offset, final int size) {
         if (stopwordsItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         if (offset >= stopwordsItemList.size() || offset < 0) {
@@ -92,14 +92,14 @@ public class StopwordsFile extends DictionaryFile<StopwordsItem> {
     @Override
     public synchronized void insert(final StopwordsItem item) {
         try (SynonymUpdater updater = new SynonymUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
     @Override
     public synchronized void update(final StopwordsItem item) {
         try (SynonymUpdater updater = new SynonymUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
@@ -108,14 +108,21 @@ public class StopwordsFile extends DictionaryFile<StopwordsItem> {
         final StopwordsItem StopwordsItem = item;
         StopwordsItem.setNewInput(StringUtil.EMPTY);
         try (SynonymUpdater updater = new SynonymUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
+        }
+    }
+
+    protected void reload(final SynonymUpdater updater) {
+        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
+            reload(updater, curlResponse.getContentAsStream());
+        } catch (final IOException e) {
+            throw new DictionaryException("Failed to parse " + path, e);
         }
     }
 
     protected void reload(final SynonymUpdater updater, final InputStream in) {
         final List<StopwordsItem> itemList = new ArrayList<>();
-        try (BufferedReader reader =
-                new BufferedReader(new InputStreamReader(in != null ? in : dictionaryManager.getContentInputStream(this), Constants.UTF_8))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
             long id = 0;
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -179,10 +186,6 @@ public class StopwordsFile extends DictionaryFile<StopwordsItem> {
         return new File(path).getName();
     }
 
-    public InputStream getInputStream() throws IOException {
-        return new BufferedInputStream(dictionaryManager.getContentInputStream(this));
-    }
-
     public synchronized void update(final InputStream in) throws IOException {
         try (SynonymUpdater updater = new SynonymUpdater(null)) {
             reload(updater, in);
diff --git a/src/main/java/org/codelibs/fess/dict/synonym/SynonymFile.java b/src/main/java/org/codelibs/fess/dict/synonym/SynonymFile.java
index 9152a20e4..05ee870b7 100644
--- a/src/main/java/org/codelibs/fess/dict/synonym/SynonymFile.java
+++ b/src/main/java/org/codelibs/fess/dict/synonym/SynonymFile.java
@@ -15,7 +15,6 @@
  */
 package org.codelibs.fess.dict.synonym;
 
-import java.io.BufferedInputStream;
 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.Closeable;
@@ -33,6 +32,7 @@ import java.util.List;
 
 import org.codelibs.core.io.CloseableUtil;
 import org.codelibs.core.lang.StringUtil;
+import org.codelibs.curl.CurlResponse;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.dict.DictionaryException;
 import org.codelibs.fess.dict.DictionaryFile;
@@ -60,7 +60,7 @@ public class SynonymFile extends DictionaryFile<SynonymItem> {
     @Override
     public synchronized OptionalEntity<SynonymItem> get(final long id) {
         if (synonymItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         for (final SynonymItem synonymItem : synonymItemList) {
@@ -74,7 +74,7 @@ public class SynonymFile extends DictionaryFile<SynonymItem> {
     @Override
     public synchronized PagingList<SynonymItem> selectList(final int offset, final int size) {
         if (synonymItemList == null) {
-            reload(null, null);
+            reload(null);
         }
 
         if (offset >= synonymItemList.size() || offset < 0) {
@@ -92,14 +92,14 @@ public class SynonymFile extends DictionaryFile<SynonymItem> {
     @Override
     public synchronized void insert(final SynonymItem item) {
         try (SynonymUpdater updater = new SynonymUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
     @Override
     public synchronized void update(final SynonymItem item) {
         try (SynonymUpdater updater = new SynonymUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
         }
     }
 
@@ -109,14 +109,21 @@ public class SynonymFile extends DictionaryFile<SynonymItem> {
         synonymItem.setNewInputs(StringUtil.EMPTY_STRINGS);
         synonymItem.setNewOutputs(StringUtil.EMPTY_STRINGS);
         try (SynonymUpdater updater = new SynonymUpdater(item)) {
-            reload(updater, null);
+            reload(updater);
+        }
+    }
+
+    protected void reload(final SynonymUpdater updater) {
+        try (CurlResponse curlResponse = dictionaryManager.getContentResponse(this)) {
+            reload(updater, curlResponse.getContentAsStream());
+        } catch (final IOException e) {
+            throw new DictionaryException("Failed to parse " + path, e);
         }
     }
 
     protected void reload(final SynonymUpdater updater, final InputStream in) {
         final List<SynonymItem> itemList = new ArrayList<>();
-        try (BufferedReader reader =
-                new BufferedReader(new InputStreamReader(in != null ? in : dictionaryManager.getContentInputStream(this), Constants.UTF_8))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
             long id = 0;
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -250,10 +257,6 @@ public class SynonymFile extends DictionaryFile<SynonymItem> {
         return new File(path).getName();
     }
 
-    public InputStream getInputStream() throws IOException {
-        return new BufferedInputStream(dictionaryManager.getContentInputStream(this));
-    }
-
     public synchronized void update(final InputStream in) throws IOException {
         try (SynonymUpdater updater = new SynonymUpdater(null)) {
             reload(updater, in);