Imported Upstream version 2.9.1upstream/2.9.1

1 files changed, 148 insertions, 0 deletions

diff --git a/python/tests/input_callback.py b/python/tests/input_callback.py
new file mode 100755
index 0000000..495ab62
--- /dev/null
+++ b/python/tests/input_callback.py
@@ -0,0 +1,148 @@
+#!/usr/bin/python -u
+#
+# This tests custom input callbacks
+#
+import sys
+import libxml2
+try:
+    import StringIO
+    str_io = StringIO.StringIO
+except:
+    import io
+    str_io = io.StringIO
+
+# We implement a new scheme, py://strings/ that will reference this dictionary
+pystrings = {
+    'catalogs/catalog.xml' :
+'''<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE catalog PUBLIC "-//OASIS//DTD Entity Resolution XML Catalog V1.0//EN" "http://www.oasis-open.org/committees/entity/release/1.0/catalog.dtd">
+<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
+  <rewriteSystem systemIdStartString="http://example.com/dtds/" rewritePrefix="../dtds/"/>
+</catalog>''',
+
+    'xml/sample.xml' :
+'''<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE root SYSTEM "http://example.com/dtds/sample.dtd">
+<root>&sample.entity;</root>''',
+
+    'dtds/sample.dtd' :
+'''
+<!ELEMENT root (#PCDATA)>
+<!ENTITY sample.entity "replacement text">'''
+}
+
+prefix = "py://strings/"
+startURL = prefix + "xml/sample.xml"
+catURL = prefix + "catalogs/catalog.xml"
+
+def my_input_cb(URI):
+    if not(URI.startswith(prefix)):
+        return None
+    path = URI[len(prefix):]
+    if path not in pystrings:
+        return None
+    return str_io(pystrings[path])
+
+
+def run_test(desc, docpath, catalog, exp_status="verified", exp_err=[], test_callback=None,
+        root_name="root", root_content="replacement text"):
+    opts = libxml2.XML_PARSE_DTDLOAD | libxml2.XML_PARSE_NONET | libxml2.XML_PARSE_COMPACT
+    actual_err = []
+
+    def my_global_error_cb(ctx, msg):
+        actual_err.append((-1, msg))
+    def my_ctx_error_cb(arg, msg, severity, reserved):
+        actual_err.append((severity, msg))
+
+    libxml2.registerErrorHandler(my_global_error_cb, None)
+    try:
+        parser = libxml2.createURLParserCtxt(docpath, opts)
+        parser.setErrorHandler(my_ctx_error_cb, None)
+        if catalog is not None:
+            parser.addLocalCatalog(catalog)
+        if test_callback is not None:
+            test_callback()
+        parser.parseDocument()
+        doc = parser.doc()
+        actual_status = "loaded"
+        e = doc.getRootElement()
+        if e.name == root_name and e.content == root_content:
+            actual_status = "verified"
+        doc.freeDoc()
+    except libxml2.parserError:
+        actual_status = "not loaded"
+
+    if actual_status != exp_status:
+        print("Test '%s' failed: expect status '%s', actual '%s'" % (desc, exp_status, actual_status))
+        sys.exit(1)
+    elif actual_err != exp_err:
+        print("Test '%s' failed" % desc)
+        print("Expect errors:")
+        for s,m in exp_err: print("  [%2d] '%s'" % (s,m))
+        print("Actual errors:")
+        for s,m in actual_err: print("  [%2d] '%s'" % (s,m))
+        sys.exit(1)
+
+
+# Check that we cannot read custom schema without custom callback
+run_test(desc="Loading entity without custom callback",
+        docpath=startURL, catalog=None,
+        exp_status="not loaded", exp_err=[
+            (-1, "I/O "),
+            (-1, "warning : "),
+            (-1, "failed to load external entity \"py://strings/xml/sample.xml\"\n")
+            ])
+
+# Register handler and try to load the same entity
+libxml2.registerInputCallback(my_input_cb)
+run_test(desc="Loading entity with custom callback",
+        docpath=startURL, catalog=None,
+        exp_status="loaded", exp_err=[
+            (-1, "Attempt to load network entity http://example.com/dtds/sample.dtd"),
+            ( 4, "Entity 'sample.entity' not defined\n")
+            ])
+
+# Register a catalog (also accessible via pystr://) and retry
+run_test(desc="Loading entity with custom callback and catalog",
+        docpath=startURL, catalog=catURL)
+
+# Unregister custom callback when parser is already created
+run_test(desc="Loading entity and unregistering callback",
+        docpath=startURL, catalog=catURL,
+        test_callback=lambda: libxml2.popInputCallbacks(),
+        exp_status="loaded", exp_err=[
+            ( 3, "failed to load external entity \"py://strings/dtds/sample.dtd\"\n"),
+            ( 4, "Entity 'sample.entity' not defined\n")
+            ])
+
+# Try to load the document again
+run_test(desc="Retry loading document after unregistering callback",
+        docpath=startURL, catalog=catURL,
+        exp_status="not loaded", exp_err=[
+            (-1, "I/O "),
+            (-1, "warning : "),
+            (-1, "failed to load external entity \"py://strings/xml/sample.xml\"\n")
+            ])
+
+# But should be able to read standard I/O yet...
+run_test(desc="Loading using standard i/o after unregistering callback",
+        docpath="tst.xml", catalog=None,
+        root_name='doc', root_content='bar')
+
+# Now pop ALL input callbacks, should fail to load even standard I/O
+try:
+    while True:
+        libxml2.popInputCallbacks()
+except IndexError:
+    pass
+
+run_test(desc="Loading using standard i/o after unregistering all callbacks",
+        docpath="tst.xml", catalog=None,
+        exp_status="not loaded", exp_err=[
+            (-1, "I/O "),
+            (-1, "warning : "),
+            (-1, "failed to load external entity \"tst.xml\"\n")
+            ])
+
+print("OK")
+sys.exit(0);