Skip proxyauth on client replay, fix #6836 (#6866)

* skip proxyauth on client replay, fix #6836

* [autofix.ci] apply automated fixes

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -13,6 +13,8 @@
   ([#6819](https://github.com/mitmproxy/mitmproxy/pull/6819), @mhils)
 * Set the `unbuffered` (stdout/stderr) flag for the `mitmdump` PyInstaller build.
   ([#6821](https://github.com/mitmproxy/mitmproxy/pull/6821), @Prinzhorn)
+* Fix a bug where client replay would not work with proxyauth.
+  ([#6866](https://github.com/mitmproxy/mitmproxy/pull/6866), @mhils)
 
 
 ## 17 April 2024: mitmproxy 10.3.0

mitmproxy/addons/proxyauth.py

@@ -76,6 +76,8 @@ class ProxyAuth:
             # Is this connection authenticated by a previous HTTP CONNECT?
             if f.client_conn in self.authenticated:
                 f.metadata["proxyauth"] = self.authenticated[f.client_conn]
+            elif f.is_replay:
+                pass
             else:
                 self.authenticate_http(f)
 

test/mitmproxy/addons/test_proxyauth.py

@@ -239,6 +239,11 @@ class TestProxyAuth:
             assert not f2.response
             assert f2.metadata["proxyauth"] == ("test", "test")
 
+            f3 = tflow.tflow()
+            f3.is_replay = True
+            up.requestheaders(f3)
+            assert not f2.response
+
 
 @pytest.mark.parametrize(
     "spec",