Python binding for xmlRegisterInputCallback
It is possible to make xmlIO handle any protocol by means of
xmlRegisterInputCallback(). However, that function is currently only
available in C API. So, the natural solution seems to be implementing Python
bindings for the xmlRegisterInputCallback.
* python/generator.py: skip xmlPopInputCallbacks
* python/libxml.c python/libxml.py python/libxml_wrap.h: implement the
wrappers
* python/tests/input_callback.py python/tests/Makefile.am: also add a test case
diff --git a/python/libxml.py b/python/libxml.py
index 013d65c..193f97a 100644
--- a/python/libxml.py
+++ b/python/libxml.py
@@ -719,11 +719,35 @@
return arg
#
-# The cleanup now goes though a wrappe in libxml.c
+# The cleanup now goes though a wrapper in libxml.c
#
def cleanupParser():
libxml2mod.xmlPythonCleanupParser()
+#
+# The interface to xmlRegisterInputCallbacks.
+# Since this API does not allow to pass a data object along with
+# match/open callbacks, it is necessary to maintain a list of all
+# Python callbacks.
+#
+__input_callbacks = []
+def registerInputCallback(func):
+ def findOpenCallback(URI):
+ for cb in reversed(__input_callbacks):
+ o = cb(URI)
+ if o is not None:
+ return o
+ libxml2mod.xmlRegisterInputCallback(findOpenCallback)
+ __input_callbacks.append(func)
+
+def popInputCallbacks():
+ # First pop python-level callbacks, when no more available - start
+ # popping built-in ones.
+ if len(__input_callbacks) > 0:
+ __input_callbacks.pop()
+ if len(__input_callbacks) == 0:
+ libxml2mod.xmlUnregisterInputCallback()
+
# WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
#
# Everything before this line comes from libxml.py