mirror of
https://github.com/vercel-labs/scriptc.git
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Chris Tate
7bdd40453a
- scr_qs.c ports Node v24's legacy codec quirk-faithfully (the scan state machine with maxKeys' pair budget, unescapeBuffer's code-unit byte truncation with U+FFFD replacement decode, encodeStringified's value rules over the DOM crossing); link-gated by moduleUsesQs, and escape rides the always-linked component encoder - parse's result is the call site's ParsedUrlQuery dictionary (the networkInterfaces verification stance; the runtime fills the overflow map and groups repeats into string[] buckets), sep/eq/maxKeys complete to Node's defaults, and custom encoder/decoder options fence by name - decode/encode lower as Node's own aliases; both backends emit the same runtime calls byte-identically - querystring joins SUPPORTED_BUILTIN_MODULES, the fallback declarations, and the regenerated surface manifest, so npm-static packages requiring it unguarded stop falling back to the island (the shim stays for island code) - corpus 2460-2464 pin the grammar corners against Node: malformed escapes, '+' vs %2B, repeated keys, maxKeys with empty segments, multi-char/multi-byte separators, astral truncation, and every CJS acquisition spelling
64 lines
1.7 KiB
TypeScript
64 lines
1.7 KiB
TypeScript
// node:querystring.parse — the grammar corners of Node's legacy scan
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// (scr_qs.c's quirk-faithful port; Node is the oracle), generated as an
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// input sweep: empty/keyless/valueless segments, repeated keys becoming
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// arrays, '=' inside values, '+' meaning space (but '%2B' staying '+'),
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// malformed percent-escapes (bad hex copies literally; valid escapes
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// that decode to invalid UTF-8 take the lenient unescapeBuffer fallback
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// with U+FFFD replacement — lone-surrogate escapes included), raw
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// non-ASCII and astral input, and the encodeCheck fast path (a segment
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// only decodes when it carries a full valid %XX triple).
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import { parse } from "node:querystring";
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const cases: string[] = [
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"",
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"a",
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"a=",
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"=a",
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"=",
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"&",
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"&&",
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"a&&b",
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"a=1&",
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"&a=1",
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"a=1&&b=2",
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"a=1&a=2&a=3",
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"k=v&k=w&k=x&single=s",
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"a=b=c&==x",
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"a==b",
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"a%3Db=c",
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"key only",
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"sp ace=v al",
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"a+b=c+d&%20=+",
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"a=+%2B+",
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"a=%2B+b",
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"%zz",
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"%zz%25=%25zz",
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"%25%25=%25",
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"a=%E2%98%83&b=%FF&c=%zz&d=%1",
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"foo=%F0%9F%98%80&bar=%ED%A0%80",
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"%E2%98%83=%E2%98%83",
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"☃=☃&é=é",
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"😀=🌍",
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"%",
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"%2",
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"a=%",
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"a=%F",
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"a=%FG",
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"%GG=1",
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"1=a&0=b&x=c",
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];
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for (const c of cases) {
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console.log(JSON.stringify(c), JSON.stringify(parse(c)));
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}
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// The result dictionary reads like any index-signature record: repeated
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// keys narrow to their array bucket, singles to the string arm, absent
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// keys to undefined.
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const r = parse("k=v&k=w&single=s");
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const k = r["k"];
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if (Array.isArray(k)) console.log("bucket", k.length, k.join("|"));
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const s = r["single"];
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if (typeof s === "string") console.log("single", s);
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console.log("missing", r["missing"] === undefined);
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console.log("keys", Object.keys(parse("1=a&0=b&x=c")).join(","));
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