From 50aa873696eba1708049ea67dd52a2a129b5908b Mon Sep 17 00:00:00 2001
From: Danny Hermes <daniel.j.hermes@gmail.com>
Date: Wed, 22 Feb 2017 07:40:10 -0800
Subject: [PATCH] Adding GCCL header for HTTP APIs. (#3046)

---
 .../google/cloud/language/__init__.py         |  3 ++
 .../google/cloud/language/_http.py            |  9 ++++++
 .../unit_tests/test__http.py                  | 32 +++++++++++++++++++
 3 files changed, 44 insertions(+)

diff --git a/packages/google-cloud-language/google/cloud/language/__init__.py b/packages/google-cloud-language/google/cloud/language/__init__.py
index 93e9fd2fc67c..9519b930c333 100644
--- a/packages/google-cloud-language/google/cloud/language/__init__.py
+++ b/packages/google-cloud-language/google/cloud/language/__init__.py
@@ -15,6 +15,9 @@
 """Client library for Google Cloud Natural Language API."""
 
 
+from pkg_resources import get_distribution
+__version__ = get_distribution('google-cloud-language').version
+
 from google.cloud.language.client import Client
 from google.cloud.language.document import Document
 from google.cloud.language.document import Encoding
diff --git a/packages/google-cloud-language/google/cloud/language/_http.py b/packages/google-cloud-language/google/cloud/language/_http.py
index f419c49bd941..af0ad516677f 100644
--- a/packages/google-cloud-language/google/cloud/language/_http.py
+++ b/packages/google-cloud-language/google/cloud/language/_http.py
@@ -16,6 +16,11 @@
 
 from google.cloud import _http
 
+from google.cloud.language import __version__
+
+
+_CLIENT_INFO = _http.CLIENT_INFO_TEMPLATE.format(__version__)
+
 
 class Connection(_http.JSONConnection):
     """A connection to Google Cloud Natural Language JSON REST API.
@@ -32,3 +37,7 @@ class Connection(_http.JSONConnection):
 
     API_URL_TEMPLATE = '{api_base_url}/{api_version}/documents:{path}'
     """A template for the URL of a particular API call."""
+
+    _EXTRA_HEADERS = {
+        _http.CLIENT_INFO_HEADER: _CLIENT_INFO,
+    }
diff --git a/packages/google-cloud-language/unit_tests/test__http.py b/packages/google-cloud-language/unit_tests/test__http.py
index 496422ee2c8b..6071c697fd01 100644
--- a/packages/google-cloud-language/unit_tests/test__http.py
+++ b/packages/google-cloud-language/unit_tests/test__http.py
@@ -14,6 +14,8 @@
 
 import unittest
 
+import mock
+
 
 class TestConnection(unittest.TestCase):
 
@@ -36,3 +38,33 @@ def test_build_api_url(self):
         method = 'annotateText'
         uri += ':' + method
         self.assertEqual(conn.build_api_url(method), uri)
+
+    def test_extra_headers(self):
+        from google.cloud import _http as base_http
+        from google.cloud.language import _http as MUT
+
+        http = mock.Mock(spec=['request'])
+        response = mock.Mock(status=200, spec=['status'])
+        data = b'brent-spiner'
+        http.request.return_value = response, data
+        client = mock.Mock(_http=http, spec=['_http'])
+
+        conn = self._make_one(client)
+        req_data = 'req-data-boring'
+        result = conn.api_request(
+            'GET', '/rainbow', data=req_data, expect_json=False)
+        self.assertEqual(result, data)
+
+        expected_headers = {
+            'Content-Length': str(len(req_data)),
+            'Accept-Encoding': 'gzip',
+            base_http.CLIENT_INFO_HEADER: MUT._CLIENT_INFO,
+            'User-Agent': conn.USER_AGENT,
+        }
+        expected_uri = conn.build_api_url('/rainbow')
+        http.request.assert_called_once_with(
+            body=req_data,
+            headers=expected_headers,
+            method='GET',
+            uri=expected_uri,
+        )