ctrl2cgi: update shared helper

* split hash generation into simpler functions
* move them into helper file
* split log init into separate function

This facilitates code sharing with new version of ctrl2cgi proxy in
folow-up patches.

Change-Id: Ic5c349349d2c246f934d6701435b1a2d9de77de1
Related: SYS#4399

osmopy/trap_helper.py

@@ -22,7 +22,7 @@
  */
 """
 
-import sys, os, datetime, signal, logging, logging.handlers
+import hashlib, sys, os, datetime, signal, logging, logging.handlers
 from functools import partial
 from osmopy.osmo_ipa import Ctrl
 
@@ -95,16 +95,39 @@ def reloader(path, script, log, dbg1, dbg2, signum, _):
             sys.argv.remove(dbg2)
     os.execl(path, script, *sys.argv[1:])
 
-def debug_init(name, is_debug):
+def add_keys(inp, params, l):
     """
-    Initialize signal handlers and logging
+    Add given list of keys to input string.
+    """
+    for key in l:
+        inp += str(params.get(key))
+    return inp
+
+def gen_hash(params, skey):
+    """
+    Make mandatory parameter for HTTP request.
+    """
+    inp = add_keys('', params, ['time_stamp', 'position_validity', 'admin_status', 'policy_status'])
+    inp += skey
+    inp = add_keys(inp, params, ['bsc_id', 'lat', 'lon', 'position_validity'])
+    m = hashlib.md5()
+    m.update(inp.encode('utf-8'))
+    return m.hexdigest()
+
+def log_init(name, is_debug):
+    """
+    Initialize stdout logging.
     """
     log = logging.getLogger(name)
-    if is_debug:
-        log.setLevel(logging.DEBUG)
-    else:
-        log.setLevel(logging.INFO)
+    log.setLevel(logging.DEBUG if is_debug else logging.INFO)
     log.addHandler(logging.StreamHandler(sys.stdout))
+    return log
+
+def debug_init(name, is_debug):
+    """
+    Initialize signal handlers and logging
+    """
+    log = log_init(name, is_debug)
 
     reboot = partial(reloader, os.path.abspath(__file__), os.path.basename(__file__), log, '-d', '--debug') # keep in sync with caller's add_argument()
     signal.signal(signal.SIGHUP, reboot)

scripts/ctrl2cgi.py

@@ -22,7 +22,7 @@
  */
 """
 
-__version__ = "0.1.0" # bump this on every non-trivial change
+__version__ = "0.1.1" # bump this on every non-trivial change
 
 import argparse, os, logging, logging.handlers, datetime
 import hashlib
@@ -32,7 +32,7 @@ from functools import partial
 from distutils.version import StrictVersion as V
 from twisted.internet import defer, reactor
 from treq import post, collect
-from osmopy.trap_helper import debug_init, get_type, get_r, p_h, make_params, comm_proc
+from osmopy.trap_helper import debug_init, get_type, get_r, p_h, gen_hash, make_params, comm_proc
 from osmopy.twisted_ipa import CTRL, IPAFactory, __version__ as twisted_ipa_version
 from osmopy.osmo_ipa import Ctrl
 
@@ -57,21 +57,6 @@ def handle_reply(ts, ts_http, bid, f, log, resp):
     log_duration(log, bid, ts, ts_http)
     comm_proc(decoded.get('commands'), bid, f, log)
 
-def gen_hash(params, skey):
-    """
-    Make mandatory parameter for http request
-    """
-    inp = ''
-    for key in ['time_stamp', 'position_validity', 'admin_status', 'policy_status']:
-        inp += str(params.get(key))
-    inp += skey
-    for key in ['bsc_id', 'lat', 'lon', 'position_validity']:
-        inp += str(params.get(key))
-    m = hashlib.md5()
-    m.update(inp.encode('utf-8'))
-    res = m.hexdigest()
-    return res
-
 def make_async_req(ts, dst, par, f_write, f_log, tout):
     """
     Assemble deferred request parameters and partially instantiate response handler