http: make providing Proxy-Connection header not cause duplicated headers

Fixes test 1180 Bug: https://curl.se/mail/lib-2021-01/0095.html Reported-by: Fabian Keil Closes #6472
2021-01-17 18:20:06 +01:00 · 2021-01-17 18:20:06 +01:00 · ea6ce0afad
parent f451206266
commit ea6ce0afad
1 changed files with 1 additions and 0 deletions
--- a/lib/http.c
+++ b/lib/http.c
@ -3123,6 +3123,7 @@ CURLcode Curl_http(struct Curl_easy *data, bool *done)
 #ifndef CURL_DISABLE_PROXY
                  (conn->bits.httpproxy &&
                   !conn->bits.tunnel_proxy &&
+                   !Curl_checkheaders(data, "Proxy-Connection") &&
                   !Curl_checkProxyheaders(data, conn, "Proxy-Connection"))?
                  "Proxy-Connection: Keep-Alive\r\n":"",
 #else