Attributes removed from module code file still accessible until restart.
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Key: MODPYTHON-116
URL: http://issues.apache.org/jira/browse/MODPYTHON-116
Project: mod_python
Type: Bug
Components: core
Versions: 3.2, 3.1.4
Reporter: Graham Dumpleton
When using "apache.import_module()" directly, or when it is used indirectly by
the "Python*Handler" directives, and automatic module reloading occurs, modules
are reloaded on top of the existing module. One of the problems with this is
that if an attribute such as a function or data value is removed from the code
file on disk, when the module is reloaded, that attribute doesn't get removed
from the in memory module held by mod_python. The only way to eliminate such an
attributed from the in memory module currently is to restart Apache, automatic
module reloading doesn't help.
A good example of the problems this can cause is with mod_python.publisher.
Because attributes can be arbitrarily mapped to by a URL, if you forget to
prefix variables or functions with an underscore they will be visible to a
request. If such a mistake was realised and you change the source code to add
an underscore prefix and relied on automatic module reloading, it wouldn't
actually get rid of the incorrectly named attribute in the module held in the
mod_python cache. Thus, the restart of Apache is still required.
As it stands for mod_python.publisher, the problem is fixed in 3.2.6, but it
still exists for direct use of "apache.import_module()" and "Python*Handler"
directives. The consequences outside of mod_python.publisher may not be as
problematic, bu depends on specific user code.
A scheme whereby new modules are reloaded into a new module instance would
eliminate this problem.
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