diff --git a/python/generator.py b/python/generator.py
index 767c4bb..83d100c 100755
--- a/python/generator.py
+++ b/python/generator.py
@@ -339,6 +339,8 @@ def skip_function(name):
         return 1
     if name == "xmlValidateAttributeDecl":
         return 1
+    if name == "xmlPopInputCallbacks":
+	return 1
 
     return 0
 
diff --git a/python/libxml.c b/python/libxml.c
index a556160..7522cea 100644
--- a/python/libxml.c
+++ b/python/libxml.c
@@ -665,7 +665,7 @@ pythonExternalEntityLoader(const char *URL, const char *ID,
 	Py_XDECREF(ctxtobj);
 #ifdef DEBUG_LOADER
 	printf("pythonExternalEntityLoader: result ");
-	PyObject_Print(ret, stderr, 0);
+	PyObject_Print(ret, stdout, 0);
 	printf("\n");
 #endif
 
@@ -711,19 +711,110 @@ libxml_xmlSetEntityLoader(ATTRIBUTE_UNUSED PyObject *self, PyObject *args) {
 		&loader))
 	return(NULL);
 
+    if (!PyCallable_Check(loader)) {
+	PyErr_SetString(PyExc_ValueError, "entity loader is not callable");
+	return(NULL);
+    }
+
 #ifdef DEBUG_LOADER
     printf("libxml_xmlSetEntityLoader\n");
 #endif
     if (defaultExternalEntityLoader == NULL) 
 	defaultExternalEntityLoader = xmlGetExternalEntityLoader();
 
+    Py_XDECREF(pythonExternalEntityLoaderObjext);
     pythonExternalEntityLoaderObjext = loader;
+    Py_XINCREF(pythonExternalEntityLoaderObjext);
     xmlSetExternalEntityLoader(pythonExternalEntityLoader);
 
     py_retval = PyInt_FromLong(0);
     return(py_retval);
 }
 
+/************************************************************************
+ *									*
+ *		Input callback registration				*
+ *									*
+ ************************************************************************/
+static PyObject *pythonInputOpenCallbackObject;
+static int pythonInputCallbackID = -1;
+
+static int
+pythonInputMatchCallback(ATTRIBUTE_UNUSED const char *URI)
+{
+    /* Always return success, real decision whether URI is supported will be
+     * made in open callback.  */
+    return 1;
+}
+
+static void *
+pythonInputOpenCallback(const char *URI)
+{
+    PyObject *ret;
+
+    ret = PyObject_CallFunction(pythonInputOpenCallbackObject,
+	    (char *)"s", URI);
+    return ret == Py_None ? NULL : ret;
+}
+
+PyObject *
+libxml_xmlRegisterInputCallback(ATTRIBUTE_UNUSED PyObject *self,
+                                PyObject *args) {
+    PyObject *cb;
+
+    if (!PyArg_ParseTuple(args,
+		(const char *)"O:libxml_xmlRegisterInputCallback", &cb))
+	return(NULL);
+
+    if (!PyCallable_Check(cb)) {
+	PyErr_SetString(PyExc_ValueError, "input callback is not callable");
+	return(NULL);
+    }
+
+    /* Python module registers a single callback and manages the list of
+     * all callbacks internally. This is necessitated by xmlInputMatchCallback
+     * API, which does not allow for passing of data objects to discriminate
+     * different Python methods.  */
+    if (pythonInputCallbackID == -1) {
+	pythonInputCallbackID = xmlRegisterInputCallbacks(
+		pythonInputMatchCallback, pythonInputOpenCallback,
+		xmlPythonFileReadRaw, xmlPythonFileCloseRaw);
+	if (pythonInputCallbackID == -1)
+	    return PyErr_NoMemory();
+	pythonInputOpenCallbackObject = cb;
+	Py_INCREF(pythonInputOpenCallbackObject);
+    }
+
+    Py_INCREF(Py_None);
+    return(Py_None);
+}
+
+PyObject *
+libxml_xmlUnregisterInputCallback(ATTRIBUTE_UNUSED PyObject *self,
+                                ATTRIBUTE_UNUSED PyObject *args) {
+    int ret;
+
+    ret = xmlPopInputCallbacks();
+    if (pythonInputCallbackID != -1) {
+	/* Assert that the right input callback was popped. libxml's API does not
+	 * allow removal by ID, so all that could be done is an assert.  */
+	if (pythonInputCallbackID == ret) {
+	    pythonInputCallbackID = -1;
+	    Py_DECREF(pythonInputOpenCallbackObject);
+	    pythonInputOpenCallbackObject = NULL;
+	} else {
+	    PyErr_SetString(PyExc_AssertionError, "popped non-python input callback");
+	    return(NULL);
+	}
+    } else if (ret == -1) {
+	/* No more callbacks to pop */
+	PyErr_SetString(PyExc_IndexError, "no input callbacks to pop");
+	return(NULL);
+    }
+
+    Py_INCREF(Py_None);
+    return(Py_None);
+}
 
 /************************************************************************
  *									*
@@ -3693,6 +3784,8 @@ static PyMethodDef libxmlMethods[] = {
     {(char *) "getObjDesc", libxml_getObjDesc, METH_VARARGS, NULL},
     {(char *) "compareNodesEqual", libxml_compareNodesEqual, METH_VARARGS, NULL},
     {(char *) "nodeHash", libxml_nodeHash, METH_VARARGS, NULL},
+    {(char *) "xmlRegisterInputCallback", libxml_xmlRegisterInputCallback, METH_VARARGS, NULL},
+    {(char *) "xmlUnregisterInputCallback", libxml_xmlUnregisterInputCallback, METH_VARARGS, NULL},
     {NULL, NULL, 0, NULL}
 };
 
diff --git a/python/libxml.py b/python/libxml.py
index c861a70..45c8223 100644
--- a/python/libxml.py
+++ b/python/libxml.py
@@ -719,11 +719,35 @@ class xmlTextReaderCore:
             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 
diff --git a/python/libxml_wrap.h b/python/libxml_wrap.h
index eaa5e96..ac5a626 100644
--- a/python/libxml_wrap.h
+++ b/python/libxml_wrap.h
@@ -247,3 +247,5 @@ PyObject * libxml_xmlSchemaValidCtxtPtrWrap(xmlSchemaValidCtxtPtr valid);
 #endif /* LIBXML_SCHEMAS_ENABLED */
 PyObject * libxml_xmlErrorPtrWrap(xmlErrorPtr error);
 PyObject * libxml_xmlSchemaSetValidErrors(PyObject * self, PyObject * args);
+PyObject * libxml_xmlRegisterInputCallback(PyObject *self, PyObject *args);
+PyObject * libxml_xmlUnregisterInputCallback(PyObject *self, PyObject *args);