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-
-
- 'use strict'
-
-
-
- module.exports = forwarded
-
-
-
- function forwarded (req) {
- if (!req) {
- throw new TypeError('argument req is required')
- }
-
-
- var proxyAddrs = parse(req.headers['x-forwarded-for'] || '')
- var socketAddr = getSocketAddr(req)
- var addrs = [socketAddr].concat(proxyAddrs)
-
-
- return addrs
- }
-
-
-
- function getSocketAddr (req) {
- return req.socket
- ? req.socket.remoteAddress
- : req.connection.remoteAddress
- }
-
-
-
- function parse (header) {
- var end = header.length
- var list = []
- var start = header.length
-
-
- for (var i = header.length - 1; i >= 0; i--) {
- switch (header.charCodeAt(i)) {
- case 0x20:
- if (start === end) {
- start = end = i
- }
- break
- case 0x2c:
- if (start !== end) {
- list.push(header.substring(start, end))
- }
- start = end = i
- break
- default:
- start = i
- break
- }
- }
-
-
- if (start !== end) {
- list.push(header.substring(start, end))
- }
-
- return list
- }
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