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| author | Arthur de Jong <arthur@arthurdejong.org> | 2006-05-07 12:31:19 +0200 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2006-05-07 12:31:19 +0200 |
| commit | c411aafcb1be55376d9228183d518e977741cf02 (patch) | |
| tree | 60ba3ad7c621830c491668e1224863eea5367421 | |
| parent | 5bd6ce9be9978a91a7a74f653db8daf3d9bbdf79 (diff) | |
ensure that we are not importing anything weird by using invalid scheme names
git-svn-id: http://arthurdejong.org/svn/webcheck/webcheck@260 86f53f14-5ff3-0310-afe5-9b438ce3f40c
| -rw-r--r-- | schemes/__init__.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/schemes/__init__.py b/schemes/__init__.py index cc466a5..b9a9eeb 100644 --- a/schemes/__init__.py +++ b/schemes/__init__.py @@ -32,11 +32,20 @@ Each module should export the following function: returned if the content type is mentioned in the acceptedtypes list.""" +import re + +# pattern to match valid scheme names +_schemepattern = re.compile('^[A-Za-z][A-Za-z0-9]*$') + # a map of schemes to modules _schememodules = {} def get_schememodule(scheme): """Look up the correct module for the specified scheme.""" + # check validity of scheme name + if not _schemepattern.search(scheme): + return None + # find module for scheme name if not _schememodules.has_key(scheme): try: _schememodules[scheme] = \ |