[RPC] add rpc-test for http keep-alive (persistent connections)

Author: jonasschnelli

qa/pull-tester/rpc-tests.sh

@@ -24,6 +24,7 @@ if [ "x${ENABLE_BITCOIND}${ENABLE_UTILS}${ENABLE_WALLET}" = "x111" ]; then
   ${BUILDDIR}/qa/rpc-tests/getchaintips.py --srcdir "${BUILDDIR}/src"
   ${BUILDDIR}/qa/rpc-tests/rest.py --srcdir "${BUILDDIR}/src"
   ${BUILDDIR}/qa/rpc-tests/mempool_spendcoinbase.py --srcdir "${BUILDDIR}/src"
+  ${BUILDDIR}/qa/rpc-tests/httpbasics.py --srcdir "${BUILDDIR}/src"
   #${BUILDDIR}/qa/rpc-tests/forknotify.py --srcdir "${BUILDDIR}/src"
 else
   echo "No rpc tests to run. Wallet, utils, and bitcoind must all be enabled"

qa/rpc-tests/httpbasics.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python2
+# Copyright (c) 2014 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#
+# Test REST interface
+#
+
+from test_framework import BitcoinTestFramework
+from util import *
+import base64
+
+try:
+    import http.client as httplib
+except ImportError:
+    import httplib
+try:
+    import urllib.parse as urlparse
+except ImportError:
+    import urlparse
+
+class RESTTest (BitcoinTestFramework):        
+    def run_test(self):        
+        
+        #################################################
+        # lowlevel check for http persistent connection #
+        #################################################
+        url = urlparse.urlparse(self.nodes[0].url)
+        authpair = url.username + ':' + url.password
+        headers = {"Authorization": "Basic " + base64.b64encode(authpair)}
+        
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('GET', '/', '{"method": "getbestblockhash"}', headers)
+        out1 = conn.getresponse().read();
+        assert_equal('"error":null' in out1, True)
+        assert_equal(conn.sock!=None, True) #according to http/1.1 connection must still be open!
+        
+        #send 2nd request without closing connection
+        conn.request('GET', '/', '{"method": "getchaintips"}', headers)
+        out2 = conn.getresponse().read();
+        assert_equal('"error":null' in out1, True) #must also response with a correct json-rpc message
+        assert_equal(conn.sock!=None, True) #according to http/1.1 connection must still be open!
+        conn.close()
+        
+        #same should be if we add keep-alive because this should be the std. behaviour
+        headers = {"Authorization": "Basic " + base64.b64encode(authpair), "Connection": "keep-alive"}
+        
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('GET', '/', '{"method": "getbestblockhash"}', headers)
+        out1 = conn.getresponse().read();
+        assert_equal('"error":null' in out1, True)
+        assert_equal(conn.sock!=None, True) #according to http/1.1 connection must still be open!
+        
+        #send 2nd request without closing connection
+        conn.request('GET', '/', '{"method": "getchaintips"}', headers)
+        out2 = conn.getresponse().read();
+        assert_equal('"error":null' in out1, True) #must also response with a correct json-rpc message
+        assert_equal(conn.sock!=None, True) #according to http/1.1 connection must still be open!
+        conn.close()
+        
+        #now do the same with "Connection: close"
+        headers = {"Authorization": "Basic " + base64.b64encode(authpair), "Connection":"close"}
+        
+        conn = httplib.HTTPConnection(url.hostname, url.port)
+        conn.connect()
+        conn.request('GET', '/', '{"method": "getbestblockhash"}', headers)
+        out1 = conn.getresponse().read();
+        assert_equal('"error":null' in out1, True)
+        assert_equal(conn.sock!=None, False) #now the connection must be closed after the response        
+        
+        
+if __name__ == '__main__':
+    RESTTest ().main ()