http-proxy-middleware
Version:
The one-liner node.js proxy middleware for connect, express, next.js and more
77 lines (76 loc) • 2.32 kB
JavaScript
import isGlob from 'is-glob';
import micromatch from 'micromatch';
import { ERRORS } from './errors.js';
export function matchPathFilter(pathFilter = '/', uri, req) {
// single path
if (isStringPath(pathFilter)) {
return matchSingleStringPath(pathFilter, uri);
}
// single glob path
if (isGlobPath(pathFilter)) {
return matchSingleGlobPath(pathFilter, uri);
}
// multi path
if (Array.isArray(pathFilter)) {
if (pathFilter.every(isStringPath)) {
return matchMultiPath(pathFilter, uri);
}
if (pathFilter.every(isGlobPath)) {
return matchMultiGlobPath(pathFilter, uri);
}
throw new Error(ERRORS.ERR_CONTEXT_MATCHER_INVALID_ARRAY);
}
// custom matching
if (typeof pathFilter === 'function') {
const pathname = getUrlPathName(uri);
return pathFilter(pathname, req);
}
throw new Error(ERRORS.ERR_CONTEXT_MATCHER_GENERIC);
}
/**
* @param {String} pathFilter '/api'
* @param {String} uri 'http://example.org/api/b/c/d.html'
* @return {Boolean}
*/
function matchSingleStringPath(pathFilter, uri) {
const pathname = getUrlPathName(uri);
return pathname?.indexOf(pathFilter) === 0;
}
function matchSingleGlobPath(pattern, uri) {
const pathname = getUrlPathName(uri);
const matches = micromatch([pathname], pattern);
return matches && matches.length > 0;
}
function matchMultiGlobPath(patternList, uri) {
return matchSingleGlobPath(patternList, uri);
}
/**
* @param {String} pathFilterList ['/api', '/ajax']
* @param {String} uri 'http://example.org/api/b/c/d.html'
* @return {Boolean}
*/
function matchMultiPath(pathFilterList, uri) {
let isMultiPath = false;
for (const context of pathFilterList) {
if (matchSingleStringPath(context, uri)) {
isMultiPath = true;
break;
}
}
return isMultiPath;
}
/**
* Parses URI and returns RFC 3986 path
*
* @param {String} uri from req.url
* @return {String} RFC 3986 path
*/
function getUrlPathName(uri) {
return uri && new URL(uri, 'http://0.0.0.0').pathname;
}
function isStringPath(pathFilter) {
return typeof pathFilter === 'string' && !isGlob(pathFilter);
}
function isGlobPath(pathFilter) {
return isGlob(pathFilter);
}