Tahinli/forge

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1	//! pkt-line framing for smart HTTP.
2
3	use crate::service::GitService;
4
5	/// The flush packet `0000`.
6	pub const FLUSH_PKT: &[u8] = b"0000";
7
8	/// Frames `data` as a pkt-line (4 hex length digits, including the 4 length bytes).
9	/// The payload must be at most 65516 bytes; callers pass short protocol strings.
10	pub fn pkt_line(data: &str) -> Vec<u8> {
11	let len = data.len() + 4;
12	debug_assert!(len <= 0xffff, "pkt-line payload too long");
13	let mut out = format!("{len:04x}").into_bytes();
14	out.extend_from_slice(data.as_bytes());
15	out
16	}
17
18	/// The smart-HTTP advertisement preamble: `# service=git-<svc>` as a pkt-line, then a flush.
19	pub fn service_advertisement_header(svc: GitService) -> Vec<u8> {
20	let mut out = pkt_line(&format!("# service={}\n", svc.name()));
21	out.extend_from_slice(FLUSH_PKT);
22	out
23	}