python: Handle errors when loading chained modules more properly.

[ashd.git] / python3 / ashd / wsgidir.py

diff --git a/python3/ashd/wsgidir.py b/python3/ashd/wsgidir.py
index 31afd3b..c2efcca 100644 (file)
--- a/python3/ashd/wsgidir.py
+++ b/python3/ashd/wsgidir.py
@@ -33,11 +33,13 @@ argument `.fpy=my.module.foohandler' can be given to pass requests for
 functions, you may want to use the getmod() function in this module.
 """
 
-import os, threading, types, importlib, getopt
+import sys, os, threading, types, logging, importlib, getopt
 from . import wsgiutil
 
 __all__ = ["application", "wmain", "getmod", "cachedmod", "chain"]
 
+log = logging.getLogger("wsgidir")
+
 class cachedmod(object):
     """Cache entry for modules loaded by getmod()
 
@@ -180,7 +182,11 @@ def chain(env, startreq):
     object.
     """
     path = env["SCRIPT_FILENAME"]
-    mod = getmod(path)
+    try:
+        mod = getmod(path)
+    except Exception:
+        log.error("Exception occurred when loading %s" % path, exc_info=sys.exc_info())
+        return wsgiutil.simpleerror(env, startreq, 500, "Internal Error", "Could not load WSGI handler.")
     entry = None
     if mod is not None:
         with mod.lock: