Reverting https://github.com/yaml/pyyaml/pull/74

Revert "Make pyyaml safe by default."

This reverts commit bbcf95fa051fdba9bbf879332e2f7999b195cf95.
This reverts commit 7b68405c81db889f83c32846462b238ccae5be80.
This reverts commit 517e83e8058e9d6850ab432ef22d84c2ac2bba5a.

4 files changed, 30 insertions, 41 deletions

diff --git a/lib3/yaml/__init__.py b/lib3/yaml/__init__.py
index cbb8417..2592785 100644
--- a/lib3/yaml/__init__.py
+++ b/lib3/yaml/__init__.py
@@ -66,24 +66,17 @@ def load(stream, Loader=Loader):
     """
     Parse the first YAML document in a stream
     and produce the corresponding Python object.
-
-    By default resolve only basic YAML tags, if an alternate Loader is
-    provided, may be dangerous.
     """
     loader = Loader(stream)
     try:
         return loader.get_single_data()
     finally:
         loader.dispose()
-safe_load = load
 
 def load_all(stream, Loader=Loader):
     """
     Parse all YAML documents in a stream
     and produce corresponding Python objects.
-
-    By default resolve only basic YAML tags, if an alternate Loader is
-    provided, may be dangerous.
     """
     loader = Loader(stream)
     try:
@@ -91,23 +84,22 @@ def load_all(stream, Loader=Loader):
             yield loader.get_data()
     finally:
         loader.dispose()
-safe_load_all = load_all
 
-def danger_load(stream):
+def safe_load(stream):
     """
     Parse the first YAML document in a stream
     and produce the corresponding Python object.
-    When used on untrusted input, can result in arbitrary code execution.
+    Resolve only basic YAML tags.
     """
-    return load(stream, DangerLoader)
+    return load(stream, SafeLoader)
 
-def danger_load_all(stream):
+def safe_load_all(stream):
     """
     Parse all YAML documents in a stream
     and produce corresponding Python objects.
-    When used on untrusted input, can result in arbitrary code execution.
+    Resolve only basic YAML tags.
     """
-    return load_all(stream, DangerLoader)
+    return load_all(stream, SafeLoader)
 
 def emit(events, stream=None, Dumper=Dumper,
         canonical=None, indent=None, width=None,
@@ -199,31 +191,29 @@ def dump_all(documents, stream=None, Dumper=Dumper,
         dumper.dispose()
     if getvalue:
         return getvalue()
-safe_dump_all = dump_all
 
-def danger_dump_all(documents, stream=None, **kwds):
+def dump(data, stream=None, Dumper=Dumper, **kwds):
     """
-    Serialize a sequence of Python objects into a YAML stream.
-    Produce only basic YAML tags.
+    Serialize a Python object into a YAML stream.
     If stream is None, return the produced string instead.
     """
-    return dump_all(documents, stream, Dumper=DangerDumper, **kwds)
+    return dump_all([data], stream, Dumper=Dumper, **kwds)
 
-def dump(data, stream=None, Dumper=Dumper, **kwds):
+def safe_dump_all(documents, stream=None, **kwds):
     """
-    Serialize a Python object into a YAML stream.
+    Serialize a sequence of Python objects into a YAML stream.
+    Produce only basic YAML tags.
     If stream is None, return the produced string instead.
     """
-    return dump_all([data], stream, Dumper=Dumper, **kwds)
-safe_dump = dump
+    return dump_all(documents, stream, Dumper=SafeDumper, **kwds)
 
-def danger_dump(data, stream=None, **kwds):
+def safe_dump(data, stream=None, **kwds):
     """
     Serialize a Python object into a YAML stream.
     Produce only basic YAML tags.
     If stream is None, return the produced string instead.
     """
-    return dump_all([data], stream, Dumper=DangerDumper, **kwds)
+    return dump_all([data], stream, Dumper=SafeDumper, **kwds)
 
 def add_implicit_resolver(tag, regexp, first=None,
         Loader=Loader, Dumper=Dumper):
diff --git a/lib3/yaml/cyaml.py b/lib3/yaml/cyaml.py
index ac8b0b7..d5cb87e 100644
--- a/lib3/yaml/cyaml.py
+++ b/lib3/yaml/cyaml.py
@@ -1,6 +1,6 @@
 
-__all__ = ['CBaseLoader', 'CSafeLoader', 'CLoader', 'CDangerLoader',
-        'CBaseDumper', 'CSafeDumper', 'CDumper', 'CDangerDumper']
+__all__ = ['CBaseLoader', 'CSafeLoader', 'CLoader',
+        'CBaseDumper', 'CSafeDumper', 'CDumper']
 
 from _yaml import CParser, CEmitter
 
@@ -18,15 +18,14 @@ class CBaseLoader(CParser, BaseConstructor, BaseResolver):
         BaseConstructor.__init__(self)
         BaseResolver.__init__(self)
 
-class CLoader(CParser, SafeConstructor, Resolver):
+class CSafeLoader(CParser, SafeConstructor, Resolver):
 
     def __init__(self, stream):
         CParser.__init__(self, stream)
         SafeConstructor.__init__(self)
         Resolver.__init__(self)
-CSafeLoader = CLoader
 
-class CDangerLoader(CParser, Constructor, Resolver):
+class CLoader(CParser, Constructor, Resolver):
 
     def __init__(self, stream):
         CParser.__init__(self, stream)
@@ -50,7 +49,7 @@ class CBaseDumper(CEmitter, BaseRepresenter, BaseResolver):
                 default_flow_style=default_flow_style)
         Resolver.__init__(self)
 
-class CDumper(CEmitter, SafeRepresenter, Resolver):
+class CSafeDumper(CEmitter, SafeRepresenter, Resolver):
 
     def __init__(self, stream,
             default_style=None, default_flow_style=None,
@@ -66,9 +65,8 @@ class CDumper(CEmitter, SafeRepresenter, Resolver):
         SafeRepresenter.__init__(self, default_style=default_style,
                 default_flow_style=default_flow_style)
         Resolver.__init__(self)
-CSafeDumper = CDumper
 
-class CDangerDumper(CEmitter, Serializer, Representer, Resolver):
+class CDumper(CEmitter, Serializer, Representer, Resolver):
 
     def __init__(self, stream,
             default_style=None, default_flow_style=None,
@@ -84,3 +82,4 @@ class CDangerDumper(CEmitter, Serializer, Representer, Resolver):
         Representer.__init__(self, default_style=default_style,
                 default_flow_style=default_flow_style)
         Resolver.__init__(self)
+
diff --git a/lib3/yaml/dumper.py b/lib3/yaml/dumper.py
index b2d3a07..0b69128 100644
--- a/lib3/yaml/dumper.py
+++ b/lib3/yaml/dumper.py
@@ -1,5 +1,5 @@
 
-__all__ = ['BaseDumper', 'SafeDumper', 'Dumper', 'DangerDumper']
+__all__ = ['BaseDumper', 'SafeDumper', 'Dumper']
 
 from .emitter import *
 from .serializer import *
@@ -24,7 +24,7 @@ class BaseDumper(Emitter, Serializer, BaseRepresenter, BaseResolver):
                 default_flow_style=default_flow_style)
         Resolver.__init__(self)
 
-class Dumper(Emitter, Serializer, SafeRepresenter, Resolver):
+class SafeDumper(Emitter, Serializer, SafeRepresenter, Resolver):
 
     def __init__(self, stream,
             default_style=None, default_flow_style=None,
@@ -41,9 +41,8 @@ class Dumper(Emitter, Serializer, SafeRepresenter, Resolver):
         SafeRepresenter.__init__(self, default_style=default_style,
                 default_flow_style=default_flow_style)
         Resolver.__init__(self)
-SafeDumper = Dumper
 
-class DangerDumper(Emitter, Serializer, Representer, Resolver):
+class Dumper(Emitter, Serializer, Representer, Resolver):
 
     def __init__(self, stream,
             default_style=None, default_flow_style=None,
@@ -60,3 +59,4 @@ class DangerDumper(Emitter, Serializer, Representer, Resolver):
         Representer.__init__(self, default_style=default_style,
                 default_flow_style=default_flow_style)
         Resolver.__init__(self)
+
diff --git a/lib3/yaml/loader.py b/lib3/yaml/loader.py
index 16e9fab..08c8f01 100644
--- a/lib3/yaml/loader.py
+++ b/lib3/yaml/loader.py
@@ -1,5 +1,5 @@
 
-__all__ = ['BaseLoader', 'SafeLoader', 'Loader', 'DangerLoader']
+__all__ = ['BaseLoader', 'SafeLoader', 'Loader']
 
 from .reader import *
 from .scanner import *
@@ -18,7 +18,7 @@ class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, BaseResolve
         BaseConstructor.__init__(self)
         BaseResolver.__init__(self)
 
-class Loader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
+class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
 
     def __init__(self, stream):
         Reader.__init__(self, stream)
@@ -27,9 +27,8 @@ class Loader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
         Composer.__init__(self)
         SafeConstructor.__init__(self)
         Resolver.__init__(self)
-SafeLoader = Loader
 
-class DangerLoader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
+class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
 
     def __init__(self, stream):
         Reader.__init__(self, stream)
@@ -38,3 +37,4 @@ class DangerLoader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
         Composer.__init__(self)
         Constructor.__init__(self)
         Resolver.__init__(self)
+