'use strict';
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/**
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* Module dependencies.
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*/
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const resolve = require('path').resolve;
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const fs = require('fs');
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/**
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* Serve favicon.ico
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*
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* @param {String} path
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* @param {Object} [options]
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* @return {Function}
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* @api public
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*/
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module.exports = function (path, options){
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if (!path) {
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return (ctx, next) => {
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if ('/favicon.ico' != ctx.path) {
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return next();
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}
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};
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}
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path = resolve(path);
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options = options || {};
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let icon;
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const maxAge = options.maxAge == null
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? 86400000
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: Math.min(Math.max(0, options.maxAge), 31556926000);
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const cacheControl = `public, max-age=${maxAge / 1000 | 0}`;
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return (ctx, next) => {
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if ('/favicon.ico' != ctx.path) {
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return next();
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}
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if ('GET' !== ctx.method && 'HEAD' !== ctx.method) {
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ctx.status = 'OPTIONS' == ctx.method ? 200 : 405;
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ctx.set('Allow', 'GET, HEAD, OPTIONS');
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} else {
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// lazily read the icon
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if (!icon) icon = fs.readFileSync(path);
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ctx.set('Cache-Control', cacheControl);
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ctx.type = 'image/x-icon';
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ctx.body = icon;
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}
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};
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};
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