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35 lines
1.2 KiB
Plaintext
35 lines
1.2 KiB
Plaintext
Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
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//#region src/early-hints.ts
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/**
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* Early Hints middleware for Node.js
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* Automatically sends a 103 Early Hints informational response with the specified Link header(s).
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*
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* @param options EarlyHintsOptions
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* @returns MiddlewareHandler
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*/
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const earlyHints = (options) => {
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let warned = false;
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return async (c, next) => {
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const mode = c.req.header("Sec-Fetch-Mode");
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const dest = c.req.header("Sec-Fetch-Dest");
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if (mode && mode !== "navigate" || dest && dest !== "document") return next();
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const env = c.env || {};
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const outgoing = ("server" in env ? env.server : env)?.outgoing;
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if (typeof outgoing?.writeEarlyHints !== "function") {
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if (!warned) {
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console.warn("Early Hints Middleware is not supported because writeEarlyHints is not defined.");
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warned = true;
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}
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return await next();
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}
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if (!outgoing.headersSent) {
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const link = typeof options.link === "function" ? options.link(c) : options.link;
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if (link !== void 0 && (Array.isArray(link) ? link.length > 0 : Boolean(link))) outgoing.writeEarlyHints({ link });
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}
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await next();
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};
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};
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//#endregion
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exports.earlyHints = earlyHints; |