Merge pull request #236 from sxci/sha_record_file_name

Sha record file name

Author: longbai

library/src/androidTest/java/com/qiniu/android/TestFileRecorder.java

@@ -20,6 +20,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.security.MessageDigest;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
@@ -171,7 +172,7 @@ public void testLastModify() throws IOException {
         fr.set(key, data);
         byte[] data2 = fr.get(key);
 
-        File recoderFile = new File(folder, UrlSafeBase64.encodeToString(key));
+        File recoderFile = new File(folder, hash(key));
 
         long m1 = recoderFile.lastModified();
 
@@ -183,10 +184,12 @@ public void testLastModify() throws IOException {
         assertEquals(3, data2.length);
         assertEquals('8', data2[1]);
 
+        // 让记录文件过期，两天
         recoderFile.setLastModified(new Date().getTime() - 1000 * 3600 * 48 - 2300);
 
         long m2 = recoderFile.lastModified();
 
+        // 过期后，记录数据作废
         byte[] data3 = fr.get(key);
 
         assertNull(data3);
@@ -201,4 +204,21 @@ public void testLastModify() throws IOException {
         long m4 = recoderFile.lastModified();
         assertTrue(m4 > m1);
     }
+
+    // copy from FileRecorder.
+    private static String hash(String base) {
+        try {
+            MessageDigest digest = MessageDigest.getInstance("SHA-1");
+            byte[] hash = digest.digest(base.getBytes());
+            StringBuffer hexString = new StringBuffer();
+
+            for (int i = 0; i < hash.length; i++) {
+                hexString.append(Integer.toString((hash[i] & 0xff) + 0x100, 16).substring(1));
+            }
+            return hexString.toString();
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+        return null;
+    }
 }

library/src/main/java/com/qiniu/android/storage/persistent/FileRecorder.java

@@ -1,12 +1,12 @@
 package com.qiniu.android.storage.persistent;
 
 import com.qiniu.android.storage.Recorder;
-import com.qiniu.android.utils.UrlSafeBase64;
 
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.security.MessageDigest;
 import java.util.Date;
 
 /**
@@ -39,7 +39,7 @@ public FileRecorder(String directory) throws IOException {
      */
     @Override
     public void set(String key, byte[] data) {
-        File f = new File(directory, UrlSafeBase64.encodeToString(key));
+        File f = new File(directory, hash(key));
         FileOutputStream fo = null;
         try {
             fo = new FileOutputStream(f);
@@ -63,7 +63,7 @@ public void set(String key, byte[] data) {
      */
     @Override
     public byte[] get(String key) {
-        File f = new File(directory, UrlSafeBase64.encodeToString(key));
+        File f = new File(directory, hash(key));
         FileInputStream fi = null;
         byte[] data = null;
         int read = 0;
@@ -102,7 +102,23 @@ private boolean outOfDate(File f) {
      */
     @Override
     public void del(String key) {
-        File f = new File(directory, UrlSafeBase64.encodeToString(key));
+        File f = new File(directory, hash(key));
         f.delete();
     }
+
+    private static String hash(String base) {
+        try {
+            MessageDigest digest = MessageDigest.getInstance("SHA-1");
+            byte[] hash = digest.digest(base.getBytes());
+            StringBuffer hexString = new StringBuffer();
+
+            for (int i = 0; i < hash.length; i++) {
+                hexString.append(Integer.toString((hash[i] & 0xff) + 0x100, 16).substring(1));
+            }
+            return hexString.toString();
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+        return null;
+    }
 }