koa-lite/lib/fastparse.js

57 lines
1.2 KiB
JavaScript

const url = require('url');
/**
* Parse the `str` url with fast-path short-cut.
*
* @param {string} str
* @return {Object}
* @private
*/
module.exports = function fastparse(str) {
if (typeof str !== 'string' || str.charCodeAt(0) !== 0x2f /* / */) {
return url.parse(str);
}
let pathname = str;
let query = null;
let search = null;
// This takes the regexp from https://github.com/joyent/node/pull/7878
// Which is /^(\/[^?#\s]*)(\?[^#\s]*)?$/
// And unrolls it into a for loop
for (let i = 1; i < str.length; i++) {
switch (str.charCodeAt(i)) {
case 0x3f: /* ? */
if (search === null) {
pathname = str.substring(0, i);
query = str.substring(i + 1);
search = str.substring(i);
}
break;
case 0x09: /* \t */
case 0x0a: /* \n */
case 0x0c: /* \f */
case 0x0d: /* \r */
case 0x20: /* */
case 0x23: /* # */
case 0xa0:
case 0xfeff:
return url.parse(str);
}
}
let parsed = new url.Url();
parsed.path = str;
parsed.href = str;
parsed.pathname = pathname;
if (search !== null) {
parsed.query = query;
parsed.search = search;
}
parsed.__raw = str;
return parsed;
};