new reject_bytes option to raise on bytes

lib/ultrajson.h

@@ -266,6 +266,10 @@ typedef struct __JSONObjectEncoder
   This is not valid JSON. */
   int allowNan;
 
+  /*
+  If true, bytes are rejected. */
+  int rejectBytes;
+
   /*
   Private pointer to be used by the caller. Passed as encoder_prv in JSONTypeContext */
   void *prv;

python/objToJSON.c

@@ -525,11 +525,19 @@ static void Object_beginTypeContext (JSOBJ _obj, JSONTypeContext *tc, JSONObject
     return;
   }
   else
-  if (PyBytes_Check(obj))
+  if (UNLIKELY(PyBytes_Check(obj)))
   {
     PRINTMARK();
-    pc->PyTypeToJSON = PyStringToUTF8; tc->type = JT_UTF8;
-    return;
+    if (enc->rejectBytes)
+    {
+      PyErr_Format (PyExc_TypeError, "reject_bytes is on and '%s' is bytes", PyBytes_AS_STRING(obj));
+      goto INVALID;
+    }
+    else
+    {
+      pc->PyTypeToJSON = PyStringToUTF8; tc->type = JT_UTF8;
+      return;
+    }
   }
   else
   if (PyUnicode_Check(obj))
@@ -739,7 +747,7 @@ static char *Object_iterGetName(JSOBJ obj, JSONTypeContext *tc, size_t *outLen)
 
 PyObject* objToJSON(PyObject* self, PyObject *args, PyObject *kwargs)
 {
-  static char *kwlist[] = { "obj", "ensure_ascii", "encode_html_chars", "escape_forward_slashes", "sort_keys", "indent", "allow_nan", NULL };
+  static char *kwlist[] = { "obj", "ensure_ascii", "encode_html_chars", "escape_forward_slashes", "sort_keys", "indent", "allow_nan", "reject_bytes", NULL };
 
   char buffer[65536];
   char *ret;
@@ -751,6 +759,7 @@ PyObject* objToJSON(PyObject* self, PyObject *args, PyObject *kwargs)
   PyObject *oescapeForwardSlashes = NULL;
   PyObject *osortKeys = NULL;
   int allowNan = -1;
+  int orejectBytes = -1;
 
   JSONObjectEncoder encoder =
   {
@@ -776,13 +785,14 @@ PyObject* objToJSON(PyObject* self, PyObject *args, PyObject *kwargs)
     0, //sortKeys
     0, //indent
     1, //allowNan
+    1, //rejectBytes
     NULL, //prv
   };
 
 
   PRINTMARK();
 
-  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|OOOOpi", kwlist, &oinput, &oensureAscii, &oencodeHTMLChars, &oescapeForwardSlashes, &osortKeys, &encoder.indent, &allowNan))
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|OOOOpii", kwlist, &oinput, &oensureAscii, &oencodeHTMLChars, &oescapeForwardSlashes, &osortKeys, &encoder.indent, &allowNan, &orejectBytes))
   {
     return NULL;
   }
@@ -818,6 +828,11 @@ PyObject* objToJSON(PyObject* self, PyObject *args, PyObject *kwargs)
     csNan = "NaN";
   }
 
+  if (orejectBytes != -1)
+  {
+    encoder.rejectBytes = orejectBytes;
+  }
+
 
   dconv_d2s_init(DCONV_D2S_EMIT_TRAILING_DECIMAL_POINT | DCONV_D2S_EMIT_TRAILING_ZERO_AFTER_POINT,
                  csInf, csNan, 'e', DCONV_DECIMAL_IN_SHORTEST_LOW, DCONV_DECIMAL_IN_SHORTEST_HIGH, 0, 0);

python/ujson.c

@@ -56,7 +56,8 @@ PyObject* JSONFileToObj(PyObject* self, PyObject *args, PyObject *kwargs);
 #define ENCODER_HELP_TEXT "Use ensure_ascii=false to output UTF-8. " \
     "Set encode_html_chars=True to encode < > & as unicode escape sequences. "\
     "Set escape_forward_slashes=False to prevent escaping / characters." \
-    "Set allow_nan=False to raise an exception when NaN or Inf would be serialized."
+    "Set allow_nan=False to raise an exception when NaN or Inf would be serialized." \
+    "Set reject_bytes=True to raise TypeError on bytes."
 
 static PyMethodDef ujsonMethods[] = {
   {"encode", (PyCFunction) objToJSON, METH_VARARGS | METH_KEYWORDS, "Converts arbitrary object recursively into JSON. " ENCODER_HELP_TEXT},

tests/test_ujson.py

@@ -285,7 +285,7 @@ def test_decode_dict():
 def test_encode_unicode_4_bytes_utf8_fail():
     test_input = b"\xfd\xbf\xbf\xbf\xbf\xbf"
     with pytest.raises(OverflowError):
-        ujson.encode(test_input)
+        ujson.encode(test_input, reject_bytes=False)
 
 
 def test_encode_null_character():
@@ -380,7 +380,7 @@ def test_encode_big_escape():
     for x in range(10):
         base = "\u00e5".encode()
         test_input = base * 1024 * 1024 * 2
-        ujson.encode(test_input)
+        ujson.encode(test_input, reject_bytes=False)
 
 
 def test_decode_big_escape():
@@ -757,6 +757,23 @@ def test_loads(test_input, expected):
     assert ujson.loads(test_input) == expected
 
 
+def test_reject_bytes_default():
+    data = {"a": b"b"}
+    with pytest.raises(TypeError):
+        ujson.dumps(data)
+
+
+def test_reject_bytes_true():
+    data = {"a": b"b"}
+    with pytest.raises(TypeError):
+        ujson.dumps(data, reject_bytes=True)
+
+
+def test_reject_bytes_false():
+    data = {"a": b"b"}
+    assert ujson.dumps(data, reject_bytes=False) == '{"a":"b"}'
+
+
 """
 def test_decode_numeric_int_frc_overflow():
 input = "X.Y"