Add Session method to merge environment settings with per-request settings

diff --git a/requests/sessions.py b/requests/sessions.py
index 07b6a32c489d8b64229f1f5e560037ddef803993..dafa9567a8100944b5914205f3e95cf406626968 100644 (file)
--- a/requests/sessions.py
+++ b/requests/sessions.py
@@ -435,36 +435,16 @@ class Session(SessionRedirectMixin):
 
         proxies = proxies or {}
 
-        # Gather clues from the surrounding environment.
-        if self.trust_env:
-            # Set environment's proxies.
-            env_proxies = get_environ_proxies(url) or {}
-            for (k, v) in env_proxies.items():
-                proxies.setdefault(k, v)
-
-            # Look for configuration.
-            if verify is True or verify is None:
-                verify = os.environ.get('REQUESTS_CA_BUNDLE')
-
-            # Curl compatibility.
-            if verify is True or verify is None:
-                verify = os.environ.get('CURL_CA_BUNDLE')
-
-        # Merge all the kwargs.
-        proxies = merge_setting(proxies, self.proxies)
-        stream = merge_setting(stream, self.stream)
-        verify = merge_setting(verify, self.verify)
-        cert = merge_setting(cert, self.cert)
+        settings = self.merge_environment_settings(
+            prep.url, proxies, stream, verify, cert
+        )
 
         # Send the request.
         send_kwargs = {
-            'stream': stream,
             'timeout': timeout,
-            'verify': verify,
-            'cert': cert,
-            'proxies': proxies,
             'allow_redirects': allow_redirects,
         }
+        send_kwargs.update(settings)
         resp = self.send(prep, **send_kwargs)
 
         return resp
@@ -612,6 +592,32 @@ class Session(SessionRedirectMixin):
 
         return r
 
+    def merge_environment_settings(self, url, proxies, stream, verify, cert):
+        """Checks the environment and merges it with some settings."""
+        # Gather clues from the surrounding environment.
+        if self.trust_env:
+            # Set environment's proxies.
+            env_proxies = get_environ_proxies(url) or {}
+            for (k, v) in env_proxies.items():
+                proxies.setdefault(k, v)
+
+            # Look for configuration.
+            if verify is True or verify is None:
+                verify = os.environ.get('REQUESTS_CA_BUNDLE')
+
+            # Curl compatibility.
+            if verify is True or verify is None:
+                verify = os.environ.get('CURL_CA_BUNDLE')
+
+        # Merge all the kwargs.
+        proxies = merge_setting(proxies, self.proxies)
+        stream = merge_setting(stream, self.stream)
+        verify = merge_setting(verify, self.verify)
+        cert = merge_setting(cert, self.cert)
+
+        return {'verify': verify, 'proxies': proxies, 'stream': stream,
+                'cert': cert}
+
     def get_adapter(self, url):
         """Returns the appropriate connnection adapter for the given URL."""
         for (prefix, adapter) in self.adapters.items():