Function handle_range_response_correction

src/main.rs:211–253

(
    response: &mut HttpResponseBuilder,
    range_str: Option<&String>,
    clen: Option<u64>,
    resp: &reqwest::Response,
)

}

fn handle_range_response_correction(
    response: &mut HttpResponseBuilder,
    range_str: Option<&String>,
    clen: Option<u64>,
    resp: &reqwest::Response,
) -> Option<()> {
    // Check if this is a range request (either in headers or query string)
    let has_range_request = resp.headers().contains_key("range") || range_str.is_some();

    // Only apply correction if we have a range request and response is 200 (should be 206)
    if !has_range_request
        || !resp.status().is_success()
        || resp.status() == reqwest::StatusCode::PARTIAL_CONTENT
    {
        return None;
    }

    // total_size is the full file size from the videoplayback URL's `clen`. The
    // upstream Content-Length is only the current chunk; using it as the total
    // produced malformed Content-Range that broke itag-18 seek in Chromium.
    let total_size = match clen {
        Some(c) if c > 0 => c,
        _ => resp
            .headers()
            .get("content-length")?
            .to_str()
            .ok()?
            .parse::<u64>()
            .ok()?,
    };

    if total_size == 0 {
        return None;
    }

    // Parse the range request into start/end positions
    let range_request = parse_range(range_str?, total_size)?;

    // Apply proper HTTP range headers
    apply_range_headers(response, &range_request);

    Some(())
}

fn apply_range_headers(response: &mut HttpResponseBuilder, range_request: &RangeRequest) {
    let content_range_value = format!(