Internal RelaxNG validation without calling an external process.

svn path=/scripts/rpki/relaxng.py; revision=792

1 files changed, 42 insertions, 8 deletions

diff --git a/scripts/rpki/relaxng.py b/scripts/rpki/relaxng.py
index 072d7798..f7aeb33b 100644
--- a/scripts/rpki/relaxng.py
+++ b/scripts/rpki/relaxng.py
@@ -1,6 +1,6 @@
 # $Id$
 
-import os
+import os, libxml2, sys
 
 def relaxng(xml, rng):
   """
@@ -14,10 +14,44 @@ def relaxng(xml, rng):
   #
   # If error messages from xmllint are incomprehensible, try jing too.
 
-  i, o = os.popen4(("xmllint", "--noout", "--relaxng", rng, "-"))
-  i.write(xml)
-  i.close()
-  v = o.read()
-  o.close()
-  if v != "- validates\n":
-    raise RuntimeError, "RelaxNG validation failure:\n" + v
+  if False:
+
+    i, o = os.popen4(("xmllint", "--noout", "--relaxng", rng, "-"))
+    i.write(xml)
+    i.close()
+    v = o.read()
+    o.close()
+    if v != "- validates\n":
+      raise RuntimeError, "RelaxNG validation failure:\n" + v
+
+  else:
+
+    # First cut at internal RelaxNG validation.  Not entirely
+    # satisfactory, see /usr/ports/devel/py-lxml/pkg-descr for a
+    # possible alternate approach.  Error reporting in libxml2 module
+    # apparently uses a callback which I'm not yet setting.
+
+    fh = open(rng, "r")
+    schema = fh.read()
+    fh.close()
+    rngp = libxml2.relaxNGNewMemParserCtxt(schema, len(schema))
+    rngs = rngp.relaxNGParse()
+    ctxt = rngs.relaxNGNewValidCtxt()
+
+    doc = libxml2.parseDoc(xml)
+    ret = doc.relaxNGValidateDoc(ctxt)
+    if ret != 0:
+      raise RuntimeError, "RelaxNG validation error %d" % ret
+
+    doc.freeDoc()
+    del rngp
+    del rngs
+    del ctxt
+    libxml2.relaxNGCleanupTypes()
+
+    # Memory debug specific
+    libxml2.cleanupParser()
+    if libxml2.debugMemory(1) != 0:
+      print "Memory leak %d bytes" % (libxml2.debugMemory(1))
+      libxml2.dumpMemory()
+      raise RuntimeError, "RelaxNG memory leak"