Function build_backend_url

crates/openshell-router/src/backend.rs:811–832

(endpoint: &str, path: &str)

}

fn build_backend_url(endpoint: &str, path: &str) -> String {
    let base = endpoint.trim_end_matches('/');
    // Strip the /v1 prefix from the request path when the base URL's path
    // component has /v1 as its first segment (e.g. openai/nvidia: "/v1",
    // deepinfra: "/v1/openai") or its final segment (e.g. groq:
    // "/openai/v1"). This covers all known provider shapes while preserving
    // the full path for proxy endpoints where /v1 is buried in the middle
    // (e.g. "https://proxy.example/api/v1/openai" → path "/api/v1/openai",
    // neither first nor last segment).
    let base_path_has_v1_edge_segment = base
        .find("://")
        .and_then(|i| base[i + 3..].find('/').map(|j| i + 3 + j))
        .is_some_and(|path_start| {
            let base_path = &base[path_start..];
            base_path.starts_with("/v1/") || base_path.ends_with("/v1")
        });
    if base_path_has_v1_edge_segment && (path == "/v1" || path.starts_with("/v1/")) {
        return format!("{base}{}", &path[3..]);
    }

    format!("{base}{path}")
}

/// Check whether a route targets an AWS Bedrock `InvokeModel` endpoint.
///