Avoid ZServer depending on App.

src/ZServer/HTTPServer.py

@@ -43,7 +43,6 @@ from cStringIO import StringIO
 from PubCore import handle
 from HTTPResponse import make_response
 from ZPublisher.HTTPRequest import HTTPRequest
-from App.config import getConfiguration
 
 import asyncore
 import asynchat
@@ -76,6 +75,17 @@ header2env={'content-length'    : 'CONTENT_LENGTH',
             }
 
 
+def get_http_header_max_length():
+    max_length = 8192
+    try:
+        from App.config import getConfiguration
+    except ImportError:
+        pass
+    else:
+        max_length = getConfiguration().http_header_max_length
+    return max_length
+
+
 class zhttp_collector:
     def __init__(self, handler, request, size):
         from ZServer import LARGE_FILE_THRESHOLD
@@ -352,7 +362,7 @@ class zhttp_channel(http_channel):
         requestCloseOnExec(conn)
         self.queue = []
         self.working=0
-        self.max_header_len = getConfiguration().http_header_max_length
+        self.max_header_len = get_http_header_max_length()
 
     def push(self, producer, send=1):
         # this is thread-safe when send is false

src/ZServer/utils.py

@@ -13,10 +13,26 @@
 
 """ A set of utility routines used by asyncore initialization """
 
+import sys
+
+import pkg_resources
+
+_version_string = None
+
+
+def _prep_version_data():
+    global _version_string
+    if _version_string is None:
+        v = sys.version_info
+        pyver = "python %d.%d.%d, %s" % (v[0], v[1], v[2], sys.platform)
+        dist = pkg_resources.get_distribution('Zope2')
+        _version_string = "%s, %s" % (dist.version, pyver)
+
 
 def getZopeVersion():
-    import App.version_txt
-    return App.version_txt.version_txt()
+    _prep_version_data()
+    return '(%s)' % _version_string
+
 
 def patchAsyncoreLogger():
     # Poke the Python logging module into asyncore to send messages to logging