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don't unconditionally override header

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Chandler Abraham 2016-01-21 14:43:57 -08:00 • committed by Josh Matthews
parent 7c3a8d3f5b
commit 3a949b77b2
3 changed files with 10 additions and 11 deletions
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11
components/net/http_loader.rs
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@ -523,7 +523,16 @@ pub fn modify_request_headers(headers: &mut Headers,
port: doc_url.port_or_default()
};
headers.set(host);
headers.set(UserAgent(user_agent.to_owned()));
// If the user-agent has not already been set, then use the
// browser's default user-agent or the user-agent override
// from the command line. If the user-agent is set, don't
// modify it, as setting of the user-agent by the user is
// allowed.
// https://fetch.spec.whatwg.org/#concept-http-network-or-cache-fetch step 8
if !headers.has::<UserAgent>() {
headers.set(UserAgent(user_agent.to_owned()));
}
set_default_accept(headers);
set_default_accept_encoding(headers);