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http_proxy: a blank CURLOPT_USERAGENT should not be used in CONNECT

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Extended test 80 to verify this.

Reported-by: Stefan Eissing
Fixes #12680
Closes #12681
This commit is contained in:
Daniel Stenberg 2024-01-10 23:20:09 +01:00
parent dd0f680fc0
commit 693cd16793
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2 changed files with 3 additions and 5 deletions
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4
lib/http_proxy.c
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@ -131,8 +131,8 @@ CURLcode Curl_http_proxy_create_CONNECT(struct httpreq **preq,
goto out;
}
if(!Curl_checkProxyheaders(data, cf->conn, STRCONST("User-Agent"))
&& data->set.str[STRING_USERAGENT]) {
if(!Curl_checkProxyheaders(data, cf->conn, STRCONST("User-Agent")) &&
data->set.str[STRING_USERAGENT] && *data->set.str[STRING_USERAGENT]) {
result = Curl_dynhds_cadd(&req->headers, "User-Agent",
data->set.str[STRING_USERAGENT]);
if(result)