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Fix issue with Docker API version negotiation in Traefik #4

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Fix issue with Docker API version negotiation in Traefik #4

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57e18ab
send empty body for _ping endpoint
andreasbrett Apr 4, 2026
d51533c
send cloned headers
andreasbrett Apr 4, 2026
1a5ab3c
remove formatting changes by Github Codespace
andreasbrett Apr 4, 2026
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9 changes: 9 additions & 0 deletions src/proxy.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,15 @@ pub async fn forward(
.map_err(web::Error::from)?;

let mut client_resp = web::HttpResponse::build(res.status());

// respond without body for /_ping HEAD request
if req.uri().path() == "/_ping" && req.method() == http::Method::HEAD {
for (key, value) in res.headers().iter() {
client_resp.header(key.clone(), value.clone());
}
return Ok(client_resp.finish());
}

client_resp.content_type(res.content_type());

if res.status() == 200 {
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