从 HTTP 请求响应标头中提取基于光标的分页 URL - Google Apps 脚本

Question

I am using Google Apps Script to make a series of HTTP Requests. The endpoint I have been using just switched to cursor-based pagination.

The response looks like this.

{...
 Link=
  <https://x.shopify.com/admin/api/2019-10/inventory_levels.json?limit=250&page_info=abc>;rel="previous",
  <https://x.shopify.com/admin/api/2019-10/inventory_levels.json?limit=250&page_info=def>;rel="next"
}

I can use response['Link'] to get it down to

<https://x.shopify.com/admin/api/2019-10/inventory_levels.json?limit=250&page_info=abc>;rel="previous",
<https://x.shopify.com/admin/api/2019-10/inventory_levels.json?limit=250&page_info=def>;rel="next"

Is there a way to extract page_info reliably from the "next" URL without regular expression? I am fine resorting to regular expression but I wondered if there was specific method for getting it.

Thanks in advance for your help. I dabble and get that I still have a ton to learn.

Answer 1

You can use a regex to extract the URL and whether the link is the next or previous page.

/<(.*)>; rel=\"(.*)\"/

To use this against your code you you could do something like this:

const urls = headers.links.map(link => {
  const linkContents = link.match(/<(.*)>; rel=\"(.*)\"/)

  const url = linkContents[1]
  const type = linkContents[2] // next or previous

  return { url, type }
})