WordPress Rest API 获取所有帖子

WordPress Rest API get All Posts

我正在使用以下方式获取帖子

http://demo.wp-api.org/wp-json/wp/v2/posts

这默认给我 10 个帖子,这在文档中提到。

但我想要所有的帖子而不必跟踪分页。

这可能吗?

如果没有,我可以 运行 JavaScript 循环获取所有帖子吗?

谢谢。

您可以使用 wp_remote_retrieve_body($url)wp_remote_post($url ) 获取 post 数据而不是剩余 API 用法。 wp_remote 函数独立于默认分页。

解决这个问题的一种方法是 RxJS

我们将构建一个小型 Observable 流,它将:

  • 输出全部post数据
  • 不强制我们事先知道 post 或页面的总数
  • 不强制在分页上下文中跟踪 "where we're at"

我们将使用的库:

  • Axios(为了简化 HTTP GET,因为它在 Node 和浏览器环境中都有效)
  • RxJS v6(目前是 Alpha 版本,但这里的 API 与 RxJS 5 相同)

您的环境和用例会有所不同,对于这个例子,我将在 Node 环境中。

/**
 *      This will get all posts from a default WordPress REST API
 *      First we see how many pages there are
 *      Then we make subsequent XHR requests (via Axios)
 *      That paginate through every page of posts
 */

// Importing Axios for simple AJAX request
const axios = require('axios')

// Importing RxJS @ v6.0.0-alpha.3
const { Observable, from, range } = require('rxjs')
const { switchMap, concatMap } = require('rxjs/operators')

const endpoint = 'http://demo.wp-api.org/wp-json/wp/v2/posts'

/**
 *      This sets up the initial request and the Observable stream
 *      In the return from the endpoint, the Axios request headers will have x-wp-totalpages,
 *      which gives us... the total pages of posts ;)
 */
const posts$ = Rx.Observable.from(axios.get(endpoint))
    /**
     *     We now know the total number of pages,
     *     so we'll switch to a new Observable that is just a range of numbers
     *     We'll start with 1, and end with whatever the total number of pages is
     *     This gives us a stream of 1--n--n--n... (example: 1, 2, 3, 4...)
     */
    .switchMap((
        { headers }, // using ES6 function header destructuring and arrow functions here
    ) => Rx.Observable.range(1, Number(headers['x-wp-totalpages'])))
    /**
     *     We can now paginate through all posts, getting 10/page
     *     concatMap will fire off a request, waits until it completes, and then fire the next one
     *     In each subsequent firing, we ask for the next page of posts
     */
    .concatMap(page =>
        axios.get(endpoint, {
            params: {
                page,
            },
        }),
    )
    .subscribe(
        // data here is an Array of WordPress Posts, tacking .length shows us how many per page we are getting
        ({ data }) => console.log(data.length),
        err => console.log('Oh no, an error!', err),
    )

资源

大型查询会影响网站性能,因此 per_page 的上限为 100 条记录。如果您希望检索超过 100 条记录,例如构建所有可用类别的客户端列表,您可以发出多个 API 请求并在您的应用程序中合并结果。 See this page for a complex explanation

您可以在node.js

中使用此功能
const getAllPosts = async (wordpressUrl) => {
  const url = `${wordpressUrl}/wp-json/wp/v2/posts?per_page=100`

  const maxPages = 50
  let page = 1
  let text
  const responses = []
  while (true) {
    const urlWithPage = `${url}&page=${page}`
    const res = await fetch(urlWithPage)
    text = await res.text()
    text = text.trim()
    if (res.status !== 200) {
      break
    }
    if (text === '[]') {
      break
    }
    if (!text.match(/^\[/) || !text.match(/\]$/)) {
      break
    }
    text = text.replace(/^\[/, '').replace(/\]$/, '')
    responses.push(text)

    if (page > maxPages) {
      break
    }
    page++
  }

  // get all pages and join them
  if (responses.length) {
    return `[${responses.join(',')}]`
  }

  // if didn't get any valid repsonses, send the text received
  return text
}