diff --git a/server.py b/server.py
new file mode 100644
--- /dev/null
+++ b/server.py
@@ -0,0 +1,67 @@
+import socket
+from hashtree import HashTree
+import queue
+from networkers import NetworkReader,NetworkWriter
+import collections
+import sys
+
+# debug copy default file
+import shutil
+shutil.copyfile("serverFile_.txt","serverFile.txt")
+
+
+localTree=HashTree.fromFile(open("serverFile.txt",mode="rb"))
+
+HOST = ''                 # Symbolic name meaning all available interfaces
+PORT = 50009              # Arbitrary non-privileged port
+s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+s.bind((HOST, PORT))
+s.listen(1)
+conn, addr = s.accept()
+print('Connected by', addr)
+fr=conn.makefile(mode="rb")
+fw=conn.makefile(mode="wb")
+
+networkReader=NetworkReader(fr)
+networkReader.start()
+networkWriter=NetworkWriter(fw)
+networkWriter.start()
+
+blocksToTransfer=[]
+nodeStack=collections.deque([0])
+incoming=networkReader.output # synchronized message queue
+outcoming=networkWriter.input
+
+
+while True:
+  jsonData,binData=incoming.get(timeout=2)
+  
+  if jsonData["command"]=="req": # !! index out of range
+    print("received request for node #{0}".format(jsonData["index"]))
+    nodeHash=localTree.store[jsonData["index"]]
+    
+    jsonResponse={"command":"send", "index":jsonData["index"], "dataType":"hash"}
+    binResponse=nodeHash
+    
+    outcoming.put((jsonResponse,binResponse),timeout=2)
+  
+  elif jsonData["command"]=="send" and jsonData["dataType"]=="data": # needlessly allow hashes and data in mixed order
+    print("received data block #{0}: {1}...{2}".format(jsonData["index"],binData[:5],binData[-5:]))
+    
+    dataFile=open("serverFile.txt",mode="rb+")
+    dataFile.seek(jsonData["index"]*localTree.BLOCK_SIZE)
+    dataFile.write(binData)
+    dataFile.close()
+    
+    # never update the hash tree
+    
+  elif jsonData["command"]=="end":
+    print("closing...")
+    break
+  
+  else: pass # !! error
+
+# fr.close()
+# fw.close()
+conn.close()
+sys.exit(0)