Prometheus client

Initial prometheus client

Change-Id: I8c02be6fe7e58c2f37ac19547fd7a795896af4bc
Reviewed-on: https://review.gerrithub.io/368732
Reviewed-by: Tatyanka Leontovich <tleontovich@mirantis.com>
Tested-by: Tatyanka Leontovich <tleontovich@mirantis.com>
diff --git a/tcp_tests/managers/clients/http_client.py b/tcp_tests/managers/clients/http_client.py
new file mode 100644
index 0000000..5453141
--- /dev/null
+++ b/tcp_tests/managers/clients/http_client.py
@@ -0,0 +1,49 @@
+import logging
+import urlparse
+
+import requests
+
+from tcp_tests import logger
+
+LOG = logger.logger
+
+logger = logging.getLogger(__name__)
+
+
+class HttpClient(object):
+    def __init__(self, base_url=None, user=None, password=None):
+        self.base_url = base_url
+        self.kwargs = {}
+        if user and password:
+            self.kwargs.update({"auth": (user, password)})
+
+    def set_base_url(self, base_url):
+        self.base_url = base_url
+
+    def request(self, url, method, headers=None, body=None, **kwargs):
+        logger.debug(
+            "Sending request to: {}, body: {}, headers: {}, kwargs: {}".format(
+                url, body, headers, kwargs))
+        if headers is None:
+            headers = {'Content-Type': 'application/json'}
+
+        kwargs.update(self.kwargs)
+        r = requests.request(method, urlparse.urljoin(self.base_url, url),
+                             headers=headers, data=body, **kwargs)
+
+        if not r.ok:
+            raise requests.HTTPError(r.content)
+        logger.debug(r.content)
+        return r.headers, r.content
+
+    def post(self, url, body=None, **kwargs):
+        return self.request(url, "POST", body=body, **kwargs)
+
+    def get(self, url, **kwargs):
+        return self.request(url, "GET", **kwargs)
+
+    def put(self, url, body=None, **kwargs):
+        return self.request(url, "PUT", body=body, **kwargs)
+
+    def delete(self, url, **kwargs):
+        return self.request(url, "DELETE", **kwargs)