diff --git a/HISTORY.md b/HISTORY.md
index 0f1ed15..25d07cb 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,11 @@
+## 07.19.2013
+
+* add simple json searhch api to http
+
+## 07.15.2013
+
+* crawler now will keep a hash cache, merge same hash in the cache, this makes hash_reader process less hashes
+
 ## 07.08.2013
 
 * add torrent importer which can import local torrents into torrents database
diff --git a/ebin/dhtcrawler.app b/ebin/dhtcrawler.app
index 9d031d2..f29e28c 100644
--- a/ebin/dhtcrawler.app
+++ b/ebin/dhtcrawler.app
@@ -1,6 +1,6 @@
 {application,dhtcrawler,
              [{description,"A DHT crawler to index magnet hash to torrent"},
-              {vsn,"060804a"},
+              {vsn,"75b3d82"},
               {registered,[dht_crawler_sup]},
               {applications,[kernel,stdlib,crypto,public_key,ssl,inets,bson,
                              mongodb]},
@@ -9,11 +9,12 @@
                         crawler_http,crawler_stats,crawler_sup,db_daterange,
                         db_frontend,db_hash,db_hash_index,db_loc_torrent,
                         db_store_mongo,db_system,dht_monitor,
-                        hash_cache_writer,hash_reader,hash_reader_stats,
-                        hash_reader_sup,http_cache,http_handler,index_builder,
-                        index_download,index_file,loc_torrent,
-                        loc_torrent_cache,loc_torrent_sup,name_seger,rmmseg,
-                        string_split,time_util,tor_builder,tor_download,
-                        tor_download_stats,tor_location,tor_location_reader,
-                        tor_location_writer,tor_name_seg,torrent_file,
-                        transfer,urldecode,vlog]}]}.
+                        hash_cache_writer,hash_download,hash_download_cache,
+                        hash_reader,hash_reader2,hash_reader_common,
+                        hash_reader_stats,hash_reader_sup,http_cache,
+                        http_handler,index_builder,index_download,index_file,
+                        loc_torrent,loc_torrent_cache,loc_torrent_sup,
+                        name_seger,rmmseg,string_split,time_util,tor_builder,
+                        tor_download,tor_download_stats,tor_location,
+                        tor_location_reader,tor_location_writer,tor_name_seg,
+                        torrent_file,transfer,urldecode,vlog]}]}.
diff --git a/ebin/hash_cache_writer.beam b/ebin/hash_cache_writer.beam
index 9e439fb..4f13f81 100644
Binary files a/ebin/hash_cache_writer.beam and b/ebin/hash_cache_writer.beam differ
diff --git a/ebin/hash_download.beam b/ebin/hash_download.beam
new file mode 100644
index 0000000..beb8cc1
Binary files /dev/null and b/ebin/hash_download.beam differ
diff --git a/ebin/hash_download_cache.beam b/ebin/hash_download_cache.beam
new file mode 100644
index 0000000..a6f10a1
Binary files /dev/null and b/ebin/hash_download_cache.beam differ
diff --git a/ebin/hash_reader.beam b/ebin/hash_reader.beam
index 7a91168..e92a709 100644
Binary files a/ebin/hash_reader.beam and b/ebin/hash_reader.beam differ
diff --git a/ebin/hash_reader2.beam b/ebin/hash_reader2.beam
new file mode 100644
index 0000000..16da0e0
Binary files /dev/null and b/ebin/hash_reader2.beam differ
diff --git a/ebin/hash_reader_common.beam b/ebin/hash_reader_common.beam
new file mode 100644
index 0000000..62f96cc
Binary files /dev/null and b/ebin/hash_reader_common.beam differ
diff --git a/ebin/hash_reader_sup.beam b/ebin/hash_reader_sup.beam
index cde61f0..01cfad1 100644
Binary files a/ebin/hash_reader_sup.beam and b/ebin/hash_reader_sup.beam differ