How to parse link header from github API

Question

the github API sends the pagination data for the json results in the http link header:

Link: <https://api.github.com/repos?page=3&per_page=100>; rel="next",
<https://api.github.com/repos?page=50&per_page=100>; rel="last"

since the github API is not the only API using this method (i think) i wanted to ask if someone has a useful little snippet to parse the link header (and convert it to an array for example) so that i can use it for my js app.

i googled around but found nothing useful regarding how to parse pagination from json APIs

Answer 1

The parse-link-header NPM module exists for this purpose; its source can be found on github under a MIT license (free for commercial use).

Installation is as simple as:

npm install parse-link-header

Usage looks like the following:

var parse = require('parse-link-header');
var parsed = parse('<https://api.github.com/repos?page=3&per_page=100>; rel="next", <https://api.github.com/repos?page=50&per_page=100>; rel="last"')

...after which one has parsed.next, parsed.last, etc:

{ next:
   { page: '3',
     per_page: '100',
     rel: 'next',
     url: 'https://api.github.com/repos?page=3&per_page=100' },
  last:
   { page: '50',
     per_page: '100',
     rel: 'last',
     url: ' https://api.github.com/repos?page=50&per_page=100' } }