[hoangvu12]

zeron.fetch hands the body to Luau as String::from_utf8_lossy, so a font or a picture comes back with every non-UTF-8 byte turned into U+FFFD. A plugin can't download a Google Font or an image through its service.

Now zeron.fetch(url, { binary = true }) returns body as the bytes in base64. Results reach Luau as JSON, which carries only text, so base64 is the safe way across. The 16 MB cap and the default text body don't change.

local r = zeron.fetch("https://fonts.gstatic.com/s/inter/…/Inter.ttf", { binary = true }):await()
-- r.body: base64

Related: #1367 takes the result as zeron.load_font { base64 = r.body }, and zeronsh/zgx#2074 adds the same for a window's ui.load_font.

Testing

fetch_gives_bytes_in_base64_when_asked: a local server sends all 256 byte values plus NUL and 0x80. With binary the decoded body matches byte for byte. Without it, the body is the lossy text, as before. cargo test -p zeron-engine --lib plugins::service::tests::fetch passes on Windows, with getrusage in two test helpers stubbed locally (not in this PR).

---

^{Open in [code]smith · Need help on this PR? Tag @codesmith-bot with what you need.}

[hoangvu12]

Folded into #1392, which combines our plugin pull requests into one for review. This change is its commit 71a7407.