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Fix: Log image requests the rewrite rules changed

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The WAF rule runs after the rewrites, so it matches on the raw path.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
multipleof4
2026-10-26 19:45:55 +00:00
co-authored by Claude Opus 5.5
parent 87f80ac956
commit 49aeca9060
1 changed files with 6 additions and 5 deletions
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scripts/rules.js
+6 -5
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@@ -10,22 +10,23 @@
import { MAX_PLUSES } from "../src/_utils/keys.js";
const env = process.env, hosts = process.argv.slice(2), ZONE = env.ZONE || "direct-img.link", TAG = "direct-img fold:";
const PATH = "http.request.uri.path", ARG = n => `http.request.uri.args["${n}"][0]`;
// Conditions use the raw (original) path, since the WAF rule runs after the rewrites and would see theirs
const PATH = "http.request.uri.path", RAW = "raw.http.request.uri.path", ARG = n => `http.request.uri.args["${n}"][0]`;
const api = (path, init) => fetch(`https://api.cloudflare.com/client/v4${path}`, { ...init, headers: { Authorization: `Bearer ${env.CLOUDFLARE_API_TOKEN}`, "Content-Type": "application/json" } }).then(r => r.json());
// An image request: not the homepage, assets/, robots.txt, probes like /wp-admin/x.php or an already rewritten path
const IMAGE = `http.host in {${hosts.map(h => JSON.stringify(h)).join(" ")}} and ${PATH} ne "/" and not ${PATH} contains "." and not ${PATH} wildcard "/*/*"`;
const IMAGE = `http.host in {${hosts.map(h => JSON.stringify(h)).join(" ")}} and ${RAW} ne "/" and not ${RAW} contains "." and not ${RAW} wildcard "/*/*"`;
// Folded only with no params but i and src (others get bad.webp from the worker), and without a literal + (%2B), since
// a static file's %2B stands for a space
const FOLDABLE = `${IMAGE} and (http.request.uri.query eq "" or all(http.request.uri.args.names[*] in {"i" "src"})) and not lower(${PATH}) contains "%2b"`;
const FOLDABLE = `${IMAGE} and (http.request.uri.query eq "" or all(http.request.uri.args.names[*] in {"i" "src"})) and not lower(${RAW}) contains "%2b"`;
const pluses = n => `"${"*+".repeat(n)}*"`;
const rules = {
// A rule's condition sees the original path, and the free plan has no regex_replace and allows one wildcard_replace
// A rule can't see an earlier one's rewrite, and the free plan has no regex_replace and allows one wildcard_replace
// per rule, so each rule handles an exact number of +s; a query with more always runs the worker. A missing param is
// empty, so a bare query is i-.
http_request_transform: hosts.length ? Array.from({ length: MAX_PLUSES + 1 }, (_, n) => ({
description: `${TAG} query with ${n} +`,
expression: `${FOLDABLE} and ${n ? `${PATH} wildcard ${pluses(n)}` : `not ${PATH} contains "+"`} and not ${PATH} wildcard ${pluses(n + 1)}`,
expression: `${FOLDABLE} and ${n ? `${RAW} wildcard ${pluses(n)}` : `not ${RAW} contains "+"`} and not ${RAW} wildcard ${pluses(n + 1)}`,
action: "rewrite",
action_parameters: { uri: { path: { expression: `concat("/", http.host, ${n ? `wildcard_replace(lower(${PATH}), ${pluses(n)}, "${Array.from({ length: n }, (_, k) => `\${${k + 1}}%2B`).join("")}\${${n + 1}}")` : `lower(${PATH})`}, "/i", ${ARG("i")}, "-", ${ARG("src")})` } } },
})) : [],