| 16 | * Parse the X-Forwarded-For header. |
| 17 | */ |
| 18 | export function parse(header: string) { |
| 19 | let end = header.length |
| 20 | const list = [] |
| 21 | let start = header.length |
| 22 | |
| 23 | // gather addresses, backwards |
| 24 | for (let i = header.length - 1; i >= 0; i--) { |
| 25 | switch (header.charCodeAt(i)) { |
| 26 | case 0x20 /* */: |
| 27 | if (start === end) { |
| 28 | start = end = i |
| 29 | } |
| 30 | break |
| 31 | case 0x2c /* , */: |
| 32 | if (start !== end) { |
| 33 | list.push(header.substring(start, end)) |
| 34 | } |
| 35 | start = end = i |
| 36 | break |
| 37 | default: |
| 38 | start = i |
| 39 | break |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | // final address |
| 44 | if (start !== end) list.push(header.substring(start, end)) |
| 45 | |
| 46 | return list |
| 47 | } |