WordPress Rest API获取所有帖子

时间:2018-01-29 05:07:11

标签: wordpress wordpress-rest-api

我使用以下内容获取帖子

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

这默认情况下会给我10个帖子,这些文章在文档中提到。

但我想要所有帖子而不必跟踪分页。

这可能吗?

如果没有,我可以运行JavaScript循环来获取所有帖子吗?

感谢。

4 个答案:

答案 0 :(得分:1)

解决此问题的一种方法是使用RxJS

我们将构建一个小的Observable流:

  • 输出所有发布数据
  • 不要强迫我们事先知道帖子或页面总数
  • 没有强制跟踪"我们在哪里"在分页的背景下

我们将使用的库:

  • Axios(简化HTTP GET,因为它在节点和浏览器环境中都有效)
  • RxJS v6(目前是Alpha版本,但此处的API与RxJS 5相同)

您的环境和使用案例会有所不同,对于此示例,我将进入Node环境。

/**
 *      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

答案 1 :(得分:0)

您可以使用 wp_remote_retrieve_body($ url) wp_remote_post($ url)来获取帖子数据而不是其他API使用情况。 wp_remote函数独立于默认分页。

答案 2 :(得分:0)

大型查询会损害网站性能,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请求并将结果合并到您的应用程序中。see this for complet expalin

答案 3 :(得分:0)

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
}