Add 'requests' library to third_party.

third_party/requests/hooks.py

Index: third_party/requests/hooks.py
diff --git a/third_party/requests/hooks.py b/third_party/requests/hooks.py
new file mode 100644
index 0000000000000000000000000000000000000000..5dfaf6b68018885d099b2f6e8c7bb876a9cf29d3
--- /dev/null
+++ b/third_party/requests/hooks.py
@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.hooks
+~~~~~~~~~~~~~~
+
+This module provides the capabilities for the Requests hooks system.
+
+Available hooks:
+
+``response``:
+    The response generated from a Request.
+
+"""
+
+
+HOOKS = ['response']
+
+
+def default_hooks():
+    hooks = {}
+    for event in HOOKS:
+        hooks[event] = []
+    return hooks
+
+# TODO: response is the only one
+
+
+def dispatch_hook(key, hooks, hook_data, **kwargs):
+    """Dispatches a hook dictionary on a given piece of data."""
+
+    hooks = hooks or dict()
+
+    if key in hooks:
+        hooks = hooks.get(key)
+
+        if hasattr(hooks, '__call__'):
+            hooks = [hooks]
+
+        for hook in hooks:
+            _hook_data = hook(hook_data, **kwargs)
+            if _hook_data is not None:
+                hook_data = _hook_data
+
+    return hook_data