Py3: use bytes for Message payload and key

README.md

@@ -1,40 +1,94 @@
 Confluent's Apache Kafka client for Python
 ==========================================
 
+Confluent's Kafka client for Python wraps the librdkafka C library, providing
+full Kafka protocol support at great performance and reliability.
 
-Prerequisites
-===============
+The Python bindings provides a high-level Producer and Consumer with support
+for the balanced consumer groups of Apache Kafka 0.9.
 
-    librdkafka >=0.9.1 (or master>=2016-04-13)
-    py.test  (pip install pytest)
+See the [API documentation](http://docs.confluent.io/3.0.0/clients/confluent-kafka-python/index.html) for more info.
 
 
-Build
+Usage
 =====
 
-    python setup.by build
+**Producer:**
+
+    from confluent_kafka import Producer
+
+    p = Producer({'bootstrap.servers': 'mybroker,mybroker2'})
+    for data in some_data_source:
+        p.produce('mytopic', data.encode('utf-8'))
+    p.flush()
+
+
+**High-level Consumer:**
+
+    from confluent_kafka import Consumer
+
+    c = Consumer({'bootstrap.servers': 'mybroker', 'group.id': 'mygroup',
+                  'default.topic.config': {'auto.offset.reset': 'smallest'}})
+    c.subscribe(['mytopic'])
+    while running:
+        msg = c.poll()
+        if not msg.error():
+            print('Received message: %s' % msg.value().decode('utf-8'))
+    c.close()
+
+
+
+See [examples](examples) for more examples.
+
+
+
+Prerequisites
+=============
+
+ * Python >= 2.7 or Python 3.x
+ * [librdkafka](https://github.com/edenhill/librdkafka) >= 0.9.1
 
 
 
 Install
 =======
-Preferably in a virtualenv:
+
+**Install from PyPi:**
+
+    pip install confluent-kafka
+
+
+**Install from source / tarball:**
 
     pip install .
 
 
-Run unit-tests
-==============
+Build
+=====
+
+    python setup.by build
+
+
+
+
+Tests
+=====
+
+
+**Run unit-tests:**
 
     py.test
 
+**NOTE**: Requires py.test, install by `pip install pytest`
 
-Run integration tests
-=====================
-**WARNING**: These tests require an active Kafka cluster and will make use of a topic named 'test'.
+
+**Run integration tests:**
 
     examples/integration_test.py <kafka-broker>
 
+**WARNING**: These tests require an active Kafka cluster and will make use of a topic named 'test'.
+
+
 
 
 Generate documentation
@@ -51,7 +105,3 @@ or:
 Documentation will be generated in `docs/_build/`
 
 
-Examples
-========
-
-See [examples](examples)

confluent_kafka/src/Producer.c

@@ -370,8 +370,8 @@ static PyMethodDef Producer_methods[] = {
 	  "message has been succesfully delivered or permanently fails delivery.\n"
 	  "\n"
 	  "  :param str topic: Topic to produce message to\n"
-	  "  :param str value: Message payload\n"
-	  "  :param str key: Message key\n"
+	  "  :param str|bytes value: Message payload\n"
+	  "  :param str|bytes key: Message key\n"
 	  "  :param int partition: Partition to produce to, elses uses the "
 	  "configured partitioner.\n"
 	  "  :param func on_delivery(err,msg): Delivery report callback to call "

confluent_kafka/src/confluent_kafka.c

@@ -339,12 +339,12 @@ static PyMethodDef Message_methods[] = {
 
 	{ "value", (PyCFunction)Message_value, METH_NOARGS,
 	  "  :returns: message value (payload) or None if not available.\n"
-	  "  :rtype: str or None\n"
+	  "  :rtype: str|bytes or None\n"
 	  "\n"
 	},
 	{ "key", (PyCFunction)Message_key, METH_NOARGS,
 	  "  :returns: message key or None if not available.\n"
-	  "  :rtype: str or None\n"
+	  "  :rtype: str|bytes or None\n"
 	  "\n"
 	},
 	{ "topic", (PyCFunction)Message_topic, METH_NOARGS,
@@ -486,10 +486,10 @@ PyObject *Message_new0 (const rd_kafka_message_t *rkm) {
 		self->topic = cfl_PyUnistr(
 			_FromString(rd_kafka_topic_name(rkm->rkt)));
 	if (rkm->payload)
-		self->value = cfl_PyUnistr(_FromStringAndSize(rkm->payload,
-							       rkm->len));
+		self->value = cfl_PyBin(_FromStringAndSize(rkm->payload,
+							   rkm->len));
 	if (rkm->key)
-		self->key = cfl_PyUnistr(
+		self->key = cfl_PyBin(
 			_FromStringAndSize(rkm->key, rkm->key_len));
 
 	self->partition = rkm->partition;

confluent_kafka/src/confluent_kafka.h

@@ -41,12 +41,12 @@
  *
  ****************************************************************************/
 
-#ifdef PY3
+#ifdef PY3 /* Python 3 */
 /**
  * @brief Binary type, use as cfl_PyBin(_X(A,B)) where _X() is the type-less
- *        suffix of a PyBinary/Str_X() function
+ *        suffix of a PyBytes/Str_X() function
 */
-#define cfl_PyBin(X)    PyBinary ## X
+#define cfl_PyBin(X)    PyBytes ## X
 
 /**
  * @brief Unicode type, same usage as PyBin()
@@ -62,7 +62,8 @@
  * @returns Unicode Python string object
  */
 #define cfl_PyObject_Unistr(X)  PyObject_Str(X)
-#else
+
+#else /* Python 2 */
 
 /* See comments above */
 #define cfl_PyBin(X)    PyString ## X