gzip compression for data (post and responses) (#732)

* gzip compression working in my influx stack. Needs proper tests.

* Also gzip data from server, slightly more straightforward data handling.

* Adding in test cases.

* Switching back to zlib with gzip headers.

* flake8 compatibility

* Move parameter into correct position.

per review

* Switching back to gzip for the headers.

* Fixing python 2.7 compatability with gzip.

* flake8 compatibility.

* flake8 testing

Co-authored-by: Kevin Claytor <kevin.e.claytor.civ@mail.mil>
Co-authored-by: Sebastian Borza <sebito91@gmail.com>

Author: 3 people

influxdb/client.py

@@ -7,7 +7,9 @@
 from __future__ import unicode_literals
 
 import datetime
+import gzip
 import itertools
+import io
 import json
 import random
 import socket
@@ -70,10 +72,11 @@ class InfluxDBClient(object):
         as a single file containing the private key and the certificate, or as
         a tuple of both files’ paths, defaults to None
     :type cert: str
+    :param gzip: use gzip content encoding to compress requests
+    :type gzip: bool
     :param session: allow for the new client request to use an existing
         requests Session, defaults to None
     :type session: requests.Session
-
     :raises ValueError: if cert is provided but ssl is disabled (set to False)
     """
 
@@ -93,6 +96,7 @@ def __init__(self,
                  pool_size=10,
                  path='',
                  cert=None,
+                 gzip=False,
                  session=None,
                  ):
         """Construct a new InfluxDBClient object."""
@@ -159,6 +163,8 @@ def __init__(self,
             'Accept': 'application/x-msgpack'
         }
 
+        self._gzip = gzip
+
     @property
     def _baseurl(self):
         return self.__baseurl
@@ -278,6 +284,23 @@ def request(self, url, method='GET', params=None, data=None,
         if isinstance(data, (dict, list)):
             data = json.dumps(data)
 
+        if self._gzip:
+            # Receive and send compressed data
+            headers.update({
+                'Accept-Encoding': 'gzip',
+                'Content-Encoding': 'gzip',
+            })
+            if data is not None:
+                # For Py 2.7 compatability use Gzipfile
+                compressed = io.BytesIO()
+                with gzip.GzipFile(
+                    compresslevel=9,
+                    fileobj=compressed,
+                    mode='w'
+                ) as f:
+                    f.write(data)
+                data = compressed.getvalue()
+
         # Try to send the request more than once by default (see #103)
         retry = True
         _try = 0

influxdb/tests/client_test.py

@@ -24,6 +24,8 @@
 import unittest
 import warnings
 
+import io
+import gzip
 import json
 import mock
 import requests
@@ -214,6 +216,71 @@ def test_write_points(self):
                 m.last_request.body.decode('utf-8'),
             )
 
+    def test_write_gzip(self):
+        """Test write in TestInfluxDBClient object."""
+        with requests_mock.Mocker() as m:
+            m.register_uri(
+                requests_mock.POST,
+                "http://localhost:8086/write",
+                status_code=204
+            )
+
+            cli = InfluxDBClient(database='db', gzip=True)
+            cli.write(
+                {"database": "mydb",
+                 "retentionPolicy": "mypolicy",
+                 "points": [{"measurement": "cpu_load_short",
+                             "tags": {"host": "server01",
+                                      "region": "us-west"},
+                             "time": "2009-11-10T23:00:00Z",
+                             "fields": {"value": 0.64}}]}
+            )
+
+            compressed = io.BytesIO()
+            with gzip.GzipFile(
+                compresslevel=9,
+                fileobj=compressed,
+                mode='w'
+            ) as f:
+                f.write(
+                    b"cpu_load_short,host=server01,region=us-west "
+                    b"value=0.64 1257894000000000000\n"
+                )
+
+            self.assertEqual(
+                m.last_request.body,
+                compressed.getvalue(),
+            )
+
+    def test_write_points_gzip(self):
+        """Test write points for TestInfluxDBClient object."""
+        with requests_mock.Mocker() as m:
+            m.register_uri(
+                requests_mock.POST,
+                "http://localhost:8086/write",
+                status_code=204
+            )
+
+            cli = InfluxDBClient(database='db', gzip=True)
+            cli.write_points(
+                self.dummy_points,
+            )
+
+            compressed = io.BytesIO()
+            with gzip.GzipFile(
+                compresslevel=9,
+                fileobj=compressed,
+                mode='w'
+            ) as f:
+                f.write(
+                    b'cpu_load_short,host=server01,region=us-west '
+                    b'value=0.64 1257894000123456000\n'
+                )
+            self.assertEqual(
+                m.last_request.body,
+                compressed.getvalue(),
+            )
+
     def test_write_points_toplevel_attributes(self):
         """Test write points attrs for TestInfluxDBClient object."""
         with requests_mock.Mocker() as m:

influxdb/tests/server_tests/base.py

@@ -36,6 +36,15 @@ def _setup_influxdb_server(inst):
                                      database='db')
 
 
+def _setup_gzip_client(inst):
+    inst.cli = InfluxDBClient('localhost',
+                              inst.influxd_inst.http_port,
+                              'root',
+                              '',
+                              database='db',
+                              gzip=True)
+
+
 def _teardown_influxdb_server(inst):
     remove_tree = sys.exc_info() == (None, None, None)
     inst.influxd_inst.close(remove_tree=remove_tree)
@@ -89,3 +98,41 @@ def tearDownClass(cls):
     def tearDown(self):
         """Deconstruct an instance of ManyTestCasesWithServerMixin."""
         self.cli.drop_database('db')
+
+
+class SingleTestCaseWithServerGzipMixin(object):
+    """Define the single testcase with server with gzip client mixin.
+
+    Same as the SingleTestCaseWithServerGzipMixin but the InfluxDBClient has
+    gzip=True
+    """
+
+    @classmethod
+    def setUp(cls):
+        """Set up an instance of the SingleTestCaseWithServerGzipMixin."""
+        _setup_influxdb_server(cls)
+        _setup_gzip_client(cls)
+
+    @classmethod
+    def tearDown(cls):
+        """Tear down an instance of the SingleTestCaseWithServerMixin."""
+        _teardown_influxdb_server(cls)
+
+
+class ManyTestCasesWithServerGzipMixin(object):
+    """Define the many testcase with server with gzip client mixin.
+
+    Same as the ManyTestCasesWithServerMixin but the InfluxDBClient has
+    gzip=True.
+    """
+
+    @classmethod
+    def setUpClass(cls):
+        """Set up an instance of the ManyTestCasesWithServerGzipMixin."""
+        _setup_influxdb_server(cls)
+        _setup_gzip_client(cls)
+
+    @classmethod
+    def tearDown(cls):
+        """Tear down an instance of the SingleTestCaseWithServerMixin."""
+        _teardown_influxdb_server(cls)

influxdb/tests/server_tests/client_test_with_server.py

@@ -26,6 +26,8 @@
 from influxdb.tests import skip_if_pypy, using_pypy, skip_server_tests
 from influxdb.tests.server_tests.base import ManyTestCasesWithServerMixin
 from influxdb.tests.server_tests.base import SingleTestCaseWithServerMixin
+from influxdb.tests.server_tests.base import ManyTestCasesWithServerGzipMixin
+from influxdb.tests.server_tests.base import SingleTestCaseWithServerGzipMixin
 
 # By default, raise exceptions on warnings
 warnings.simplefilter('error', FutureWarning)
@@ -913,3 +915,25 @@ def test_write_points_udp(self):
             ],
             list(rsp['cpu_load_short'])
         )
+
+
+# Run the tests again, but with gzip enabled this time
+@skip_server_tests
+class GzipSimpleTests(SimpleTests, SingleTestCaseWithServerGzipMixin):
+    """Repeat the simple tests with InfluxDBClient where gzip=True."""
+
+    pass
+
+
+@skip_server_tests
+class GzipCommonTests(CommonTests, ManyTestCasesWithServerGzipMixin):
+    """Repeat the common tests with InfluxDBClient where gzip=True."""
+
+    pass
+
+
+@skip_server_tests
+class GzipUdpTests(UdpTests, ManyTestCasesWithServerGzipMixin):
+    """Repeat the UDP tests with InfluxDBClient where gzip=True."""
+
+    pass