Util: Fix corruption of cached ReusableGZIPInputStreams,

caused by calling close() from HTTPResponseOutputStream.Pusher,
but close() rendered the underlying InflaterInputStream unusable.
Broken in -15. Caused failed HTTP fetches and other flakiness.

core/java/src/net/i2p/util/ResettableGZIPInputStream.java

@@ -168,6 +168,21 @@ public class ResettableGZIPInputStream extends InflaterInputStream {
         }
     }
 
+    /**
+     *  Does NOT call super.close(), as it cannot be reused if we do that.
+     *  Broken before 0.9.20.
+     *  @since 0.9.20
+     */
+    @Override
+    public void close() throws IOException {
+        len = 0;
+        inf.reset();
+        _complete = false;
+        _crc32.reset();
+        _buf1[0] = 0x0;
+        _extraByteInputStream.close();
+    }
+
     /**
      *  Moved from i2ptunnel HTTPResponseOutputStream.InternalGZIPInputStream
      *  @since 0.8.9

history.txt

@@ -1,4 +1,8 @@
+2015-05-11 zzz
+ * Util: Fix corruption of cached ReusableGZIPInputStreams
+
 2015-05-09 zzz
+ * i2ptunnel: Improve error handling in UDP tunnels
  * Plugins: Add support for custom icons (ticket #1550)
 
 2015-05-08 zzz

router/java/src/net/i2p/router/RouterVersion.java

@@ -18,7 +18,7 @@ public class RouterVersion {
     /** deprecated */
     public final static String ID = "Monotone";
     public final static String VERSION = CoreVersion.VERSION;
-    public final static long BUILD = 19;
+    public final static long BUILD = 20;
 
     /** for example "-test" */
     public final static String EXTRA = "-rc";