Function url_encode

crates/openshell-driver-podman/src/client.rs:748–757

Minimal percent-encoding for query parameter values. Note: `percent-encoding` is available as a transitive dependency but is not a direct dependency of this crate. Rather than adding a new dep for one call site, we keep this self-contained implementation.

(s: &str)

/// a direct dependency of this crate. Rather than adding a new dep for one
/// call site, we keep this self-contained implementation.
fn url_encode(s: &str) -> String {
    s.bytes()
        .map(|b| match b {
            b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9' | b'-' | b'_' | b'.' | b'~' => {
                String::from(b as char)
            }
            _ => format!("%{b:02X}"),
        })
        .collect()
}

#[cfg(test)]
mod tests {