retries support for get requests

CONTRIBUTORS.md

@@ -5,3 +5,4 @@
 
 ## ACKNOWLEDGEMENTS
   - mhmdiaa (<https://github.com/mhmdiaa>) for <https://gist.github.com/mhmdiaa/adf6bff70142e5091792841d4b372050>. known_urls is based on this gist.
+  - datashaman (<https://stackoverflow.com/users/401467/datashaman>) for <https://stackoverflow.com/a/35504626>. _get_response is based on this amazing answer.

tests/test_cli.py

@@ -208,7 +208,7 @@ def test_known_urls():
     args = argparse.Namespace(
         user_agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/600.8.9 \
     (KHTML, like Gecko) Version/8.0.8 Safari/600.8.9",
-        url="https://akamhy.github.io",
+        url="https://www.keybr.com",
         total=False,
         version=False,
         oldest=False,
@@ -217,13 +217,13 @@ def test_known_urls():
         archive_url=False,
         newest=False,
         near=False,
-        alive=True,
-        subdomain=True,
+        alive=False,
+        subdomain=False,
         known_urls=True,
         get=None,
     )
     reply = cli.args_handler(args)
-    assert "github" in str(reply)
+    assert "keybr" in str(reply)
 
     args = argparse.Namespace(
         user_agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/600.8.9 \
@@ -305,7 +305,7 @@ def test_get():
     args = argparse.Namespace(
         user_agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/600.8.9 \
     (KHTML, like Gecko) Version/8.0.8 Safari/600.8.9",
-        url="https://pypi.org/user/akamhy/",
+        url="https://github.com/akamhy",
         total=False,
         version=False,
         oldest=False,
@@ -325,7 +325,7 @@ def test_get():
     args = argparse.Namespace(
         user_agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/600.8.9 \
     (KHTML, like Gecko) Version/8.0.8 Safari/600.8.9",
-        url="https://pypi.org/user/akamhy/",
+        url="https://github.com/akamhy/waybackpy",
         total=False,
         version=False,
         oldest=False,
@@ -345,7 +345,7 @@ def test_get():
     args = argparse.Namespace(
         user_agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/600.8.9 \
     (KHTML, like Gecko) Version/8.0.8 Safari/600.8.9",
-        url="https://pypi.org/user/akamhy/",
+        url="https://akamhy.github.io/waybackpy/",
         total=False,
         version=False,
         oldest=False,

tests/test_wrapper.py

@@ -223,7 +223,7 @@ def test_total_archives():
 def test_known_urls():
 
     target = waybackpy.Url("akamhy.github.io", user_agent)
-    assert len(target.known_urls(alive=True, subdomain=True)) > 2
+    assert len(target.known_urls(alive=True, subdomain=False)) > 2
 
     target = waybackpy.Url("akamhy.github.io", user_agent)
     assert len(target.known_urls()) > 3

waybackpy/exceptions.py

@@ -1,3 +1,9 @@
+"""
+waybackpy.exceptions
+~~~~~~~~~~~~~~~~~~~
+This module contains the set of Waybackpy's exceptions.
+"""
+
 class WaybackError(Exception):
     """
     Raised when Wayback Machine API Service is unreachable/down.

waybackpy/wrapper.py

@@ -1,7 +1,9 @@
 import re
 import requests
 import concurrent.futures
+from urllib3.util.retry import Retry
 from datetime import datetime, timedelta
+from requests.adapters import HTTPAdapter
 from waybackpy.__version__ import __version__
 from waybackpy.exceptions import WaybackError, URLError
 
@@ -102,15 +104,15 @@ def _wayback_timestamp(**kwargs):
     )
 
 
-def _get_response(endpoint, params=None, headers=None):
+def _get_response(endpoint, params=None, headers=None, retries=5):
     """
     This function is used make get request.
     We use the requests package to make the
     requests.
 
 
-    We try twice and if both the times is fails And
-    raises exceptions we give-up and raise WaybackError.
+    We try five times and if it fails it raises
+    WaybackError exception.
 
     You can handles WaybackError by importing:
     from waybackpy.exceptions import WaybackError
@@ -121,15 +123,18 @@ def _get_response(endpoint, params=None, headers=None):
         # handle it
     """
 
+    # From https://stackoverflow.com/a/35504626
+    # By https://stackoverflow.com/users/401467/datashaman
+    s = requests.Session()
+    retries = Retry(total=retries, backoff_factor=0.5, status_forcelist=[ 500, 502, 503, 504 ])
+    s.mount('https://', HTTPAdapter(max_retries=retries))
+
     try:
-        return requests.get(endpoint, params=params, headers=headers)
-    except Exception:
-        try:
-            return requests.get(endpoint, params=params, headers=headers)
-        except Exception as e:
-            exc = WaybackError("Error while retrieving %s" % endpoint)
-            exc.__cause__ = e
-            raise exc
+        return s.get(endpoint, params=params, headers=headers)
+    except Exception as e:
+        exc = WaybackError("Error while retrieving %s" % endpoint)
+        exc.__cause__ = e
+        raise exc
 
 
 class Url:
@@ -450,12 +455,13 @@ class Url:
     ):
         """
         Returns list of URLs known to exist for given domain name
-        because these URLs were crawled by WayBack Machine bots.
-        Useful for pen-testers and others.
-        Idea by Mohammed Diaa (https://github.com/mhmdiaa) from:
-        https://gist.github.com/mhmdiaa/adf6bff70142e5091792841d4b372050
+        because these URLs were crawled by WayBack Machine spider.
+        Useful for pen-testing.
         """
 
+        # Idea by Mohammed Diaa (https://github.com/mhmdiaa) from:
+        # https://gist.github.com/mhmdiaa/adf6bff70142e5091792841d4b372050
+
         url_list = []
 
         if subdomain: