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javascript - facebook javascript API 中的分页如何工作？

转载 作者：行者123 更新时间：2023-11-30 05:14:34 24 4
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我正在尝试使用 javascript sdk 恢复我的 facebook 新闻提要中上周的帖子。我能够获得第一页，但是我不知道如何继续遍历其他页面。我已经用下面的代码试过了:

 $('#loadPosts').bind('click', function() {     
            FB.api('/me/home',{since:'last week'}, getPosts);   
          });

 getPosts = function(response){
        for (element in response.data){
            post = response.data[element]
            console.log(post);          
          }

          previousPage = response.paging.previous;        
          console.log(previousPage);

          // can i call FB.api(previousPage, getPosts); ??      

      }

但我得到的 URL 与上一页一样，但我不知道如何从该 URL 进行 javascript FB.api 调用。有什么想法吗？

最佳答案

好吧，似乎很多人都在提示一个简单的问题，我仍然相信我的旧答案已经澄清了。无论如何，让我照顾你。 :)

首先:我发现您无法真正从第一页转到“上一页”。理想情况下，我应该。所以，这是我提交的一个错误，您可能想要关注:https://developers.facebook.com/bugs/391562790938294?browse=search_50fcac3ce094e7068176315

第二:如果这是设计使然，您无法从第一页返回到“上一页”(因为没有上一页)，但您肯定可以到“下一步”。但是，由于 API 的行为类似于游标，并且您已经向前移动，现在您的“上一个”页面可以正常工作。

问题的答案:
我得到的 URL 与上一页一样，但我不知道如何从该 URL 进行 javascript FB.api 调用。有什么想法吗？

yes, you can make FB.api call. But I suggest you to make a HTTP GET call instead, because it's easier. Also, note that previous may return and empty array like {"data":[]}

如何获取上一页/下一页？
在这里，我正在编写一个使用 jQuery 的小代码。如果您不想阅读代码，有两种方法:

  1. 使用上一个/下一个 URL 并发出 HTTP GET 请求。其中，如果不为空，将带有下一组“上一个”、“下一个”链接。
  2. 解析 URL，获取 JSON 形式的查询字符串并将其传递给 FB.api。我使用 jQuery BBQ pluging 进行解析。

重要说明:在示例中，我使用“下一个”URL，因为在第一个请求中，如果我使用“上一个”，它会提供空的 JSON 而不是提供过去的帖子。但是，一旦我向前移动了几页，我就可以使用“上一个”URL。与 Google 搜索结果一样，您不能在第 1 页转到上一页，但可以从 > 1 的任何页面转到上一页(参见下面的示例 3)。这称为分页。

示例 1:使用 HTTP GET 的代码(首选):(我将加载 3 个帖子/页面并查看三个下一页)

<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<script type="text/javascript" src="http://connect.facebook.net/en_US/all.js"></script>
<script type="text/javascript" src="https://raw.github.com/cowboy/jquery-bbq/master/jquery.ba-bbq.min.js"></script>
<script>

var i =0;
var getPosts = function (response){
          for (element in response.data){
            post = response.data[element]
            console.log(post.id + ": " +post.message);          
          }



          // can i call FB.api(nextPage, getPosts); ??
          if(i < 2){
              nextPage = response.paging.next;        
              console.log(nextPage);
              i++;
              //Method 1: I use it.
              $.get(nextPage, getPosts, "json"); //optional: $.getJSON can be use instead
          }

      }

$(document).ready(function(){

$('#loadPosts').bind('click', function() {
            FB.api('/me/home',{since:'yesterday','limit': '3'}, getPosts);   
          });
})
</script>
</head>
<body>
<div id="fb-root"></div>
<script>
  window.fbAsyncInit = function() {
    // init the FB JS SDK
    FB.init({
      appId      : 'XXXXXXXXXXXX', // FILL YOUR APP ID HERE!
      status     : true, // check the login status upon init?
      cookie     : true, // set sessions cookies to allow your server to access the session?
    });

    // Additional initialization code such as adding Event Listeners goes here

  };
</script>
<button id="loadPosts">Load Posts</button>
<p>Please open developer console to see what's happening. In Firefox, you can use ctrl+shift+k, and in Chrome/Chromium use ctrl+shift+i</p>
</body>
</html>

响应:

100004192352945_156620584487686: undefined
137723270230_10152423499430231: On this day, please spare a thought for those fellow citizens, for whom I just spare a thought and do nothing else.
642965867_10151211036740868: Thanks everyone for their wishes! The wishes made my day!

https://graph.facebook.com/677811901/home?limit=3&access_token=AAACYjXGS5FQBAIR3brc2LibjBcZCi2kRJUybG8VMaaJSZARQ8SzNE7BE4PBrDIFVZB0AaVEa1dZCpX1fhCvoD2rnq8uc8OGaIFhO9uvVXAZDZD&until=1359184568
367116489976035_536776529676696: Rage. Quit. Life.
899605553_10152450871820554: undefined
367116489976035_417820828298092: undefined

https://graph.facebook.com/677811901/home?limit=3&access_token=AAACYjXGS5FQBAIR3brc2LibjBcZCi2kRJUybG8VMaaJSZARQ8SzNE7BE4PBrDIFVZB0AaVEa1dZCpX1fhCvoD2rnq8uc8OGaIFhO9uvVXAZDZD&until=1359179890
137723270230_10152423148745231: Pratibha Patil used to love the Republic Day Parade, especially the part where the visiting Chief Guest extended her an invitation to visit his/her own country.
137723270230_10152423131700231: The Kingfisher tableau at Republic Day Parade was so simple. Vijay Mallya riding a bicycle.
367116489976035_484460034950769: undefined

示例 2:使用 FB.api 的代码:(我将加载 3 个帖子/页面并查看三个下一页)

<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<script type="text/javascript" src="http://connect.facebook.net/en_US/all.js"></script>
<script type="text/javascript" src="https://raw.github.com/cowboy/jquery-bbq/master/jquery.ba-bbq.min.js"></script>
<script>

var i =0;
var getPosts = function (response){
          for (element in response.data){
            post = response.data[element]
            console.log(post.id + ": " +post.message);          
          }



          // can i call FB.api(nextPage, getPosts); ??
          if(i < 2){
              nextPage = response.paging.next;        
              console.log(nextPage);
              i++;

              //Method 2: If you have to call FB.api
              var params = jQuery.deparam.querystring(nextPage);
              console.log(JSON.stringify(params, null, 2));
              FB.api('/me/home', params, getPosts)
          }

      }

$(document).ready(function(){

$('#loadPosts').bind('click', function() {
            FB.api('/me/home',{since:'yesterday','limit': '3'}, getPosts);   
          });
})
</script>
</head>
<body>
<div id="fb-root"></div>
<script>
  window.fbAsyncInit = function() {
    // init the FB JS SDK
    FB.init({
      appId      : 'XXXXXXXXXXXX', // FILL YOUR APP ID HERE!
      status     : true, // check the login status upon init?
      cookie     : true, // set sessions cookies to allow your server to access the session?
    });

    // Additional initialization code such as adding Event Listeners goes here

  };
</script>
<button id="loadPosts">Load Posts</button>
<p>Please open developer console to see what's happening. In Firefox, you can use ctrl+shift+k, and in Chrome/Chromium use ctrl+shift+i</p>
</body>
</html>

响应:

367116489976035_536776529676696: Rage. Quit. Life.
899605553_10152450871820554: undefined
367116489976035_417820828298092: undefined
{
  "limit": "3",
  "access_token": "AAACYjXGS5FQBAIR3brc2LibjBcZCi2kRJUybG8VMaaJSZARQ8SzNE7BE4PBrDIFVZB0AaVEa1dZCpX1fhCvoD2rnq8uc8OGaIFhO9uvVXAZDZD",
  "until": "1359179890"
}

137723270230_10152423148745231: Pratibha Patil used to love the Republic Day Parade, especially the part where the visiting Chief Guest extended her an invitation to visit his/her own country.
137723270230_10152423131700231: The Kingfisher tableau at Republic Day Parade was so simple. Vijay Mallya riding a bicycle.
367116489976035_484460034950769: undefined

https://graph.facebook.com/677811901/home?limit=3&access_token=AAACYjXGS5FQBAIR3brc2LibjBcZCi2kRJUybG8VMaaJSZARQ8SzNE7BE4PBrDIFVZB0AaVEa1dZCpX1fhCvoD2rnq8uc8OGaIFhO9uvVXAZDZD&until=1359178140
{
  "limit": "3",
  "access_token": "AAACYjXGS5FQBAIR3brc2LibjBcZCi2kRJUybG8VMaaJSZARQ8SzNE7BE4PBrDIFVZB0AaVEa1dZCpX1fhCvoD2rnq8uc8OGaIFhO9uvVXAZDZD",
  "until": "1359178140"
}
655515199_403590309726450: a good resolution to take on Republic Day
505588854_496901583686790: Love the secret world that slow motion reveals.
693811975_10151217837201976: undefined

示例3:执行:page1 -> page2 -> page1 or page -> next -> previous 下面的代码会加载page1，然后转到“下一个”页面(page2)，然后来返回 page1，使用“previous”

<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<script type="text/javascript" src="http://connect.facebook.net/en_US/all.js"></script>
<script type="text/javascript" src="https://raw.github.com/cowboy/jquery-bbq/master/jquery.ba-bbq.min.js"></script>
<script>

var i =0;
var getPosts = function (response){
          for (element in response.data){
            post = response.data[element]
            console.log(post.id + ": " +post.message);          
          }



          // can i call FB.api(nextPage, getPosts); ??
          if(i < 2){
              nextPage = response.paging.next;        
              if(i==1)
                nextPage = response.paging.previous;

              console.log(nextPage);
              i++;
              $.get(nextPage, getPosts, "json"); //optional: $.getJSON can be use instead
          }

      }

$(document).ready(function(){

$('#loadPosts').bind('click', function() {
            FB.api('/me/home',{since:'yesterday','limit': '3'}, getPosts);   
          });
})
</script>
</head>
<body>
<div id="fb-root"></div>
<script>
  window.fbAsyncInit = function() {
    // init the FB JS SDK
    FB.init({
      appId      : 'XXXXXXXXXXXX', // FILL YOUR APP ID HERE!
      status     : true, // check the login status upon init?
      cookie     : true, // set sessions cookies to allow your server to access the session?
    });

    // Additional initialization code such as adding Event Listeners goes here

  };
</script>
<button id="loadPosts">Load Posts</button>
<p>Please open developer console to see what's happening. In Firefox, you can use ctrl+shift+k, and in Chrome/Chromium use ctrl+shift+i</p>
</body>
</html>

响应:

PAGE1:
367116489976035_536806916340324: How big is the Solar System?
Full infographic here: http://bit.ly/WmzfVn
137723270230_10152423534790231: "Sociologist" Ashis Nandy has claimed that most of the corrupt came from OBC/SC/ST castes.
Following this, Corrupt people have strongly condemned Nandy's attempts to divide them on caste lines. They'll be united in loot, forever.
100004192352945_156620584487686: undefined

PAGE2:
https://graph.facebook.com/677811901/home?limit=3&access_token=AAACYjXGS5FQBAKqIMyCVYjH9upK4e2bjUwLoVbbFDL0ffc0SZBTVR9MUFGV4ZCq6HBdFIadFMpLDC3ATMZCJ4GPsXWpG4qTGODavuvzLAZDZD&until=1359185659

137723270230_10152423499430231: On this day, please spare a thought for those fellow citizens, for whom I just spare a thought and do nothing else.
642965867_10151211036740868: Thanks everyone for their wishes! The wishes made my day!
367116489976035_536776529676696: Rage. Quit. Life.

PAGE1:
https://graph.facebook.com/677811901/home?limit=3&access_token=AAACYjXGS5FQBAKqIMyCVYjH9upK4e2bjUwLoVbbFDL0ffc0SZBTVR9MUFGV4ZCq6HBdFIadFMpLDC3ATMZCJ4GPsXWpG4qTGODavuvzLAZDZD&since=1359185123&__previous=1

367116489976035_536806916340324: How big is the Solar System?
Full infographic here: http://bit.ly/WmzfVn
137723270230_10152423534790231: "Sociologist" Ashis Nandy has claimed that most of the corrupt came from OBC/SC/ST castes.
Following this, Corrupt people have strongly condemned Nandy's attempts to divide them on caste lines. They'll be united in loot, forever.
100004192352945_156620584487686: undefined

旧答案

使用limit、offset、since 和until 参数来实现您的目标。

引用:http://developers.facebook.com/docs/reference/api/

Paging

When querying connections, there are several useful parameters that enable you to filter and page through connection data:

以下应该获取从 上周 到 昨天 从 21st - 30th 消息开始的所有帖子(基本上，每条消息的第三页 10 条消息页面分页)。

 FB.api(
  '/me/home',
  {
    'since':'last week',
    'limit': '10',
    'offset': '20',
    'until': 'yesterday'
  }, 
  getPosts
);

我刚刚测试过，它有效。我使用了 limit=4，这是一种页面大小的东西。所以，当我使用这个从 2011 年 2 月 2 日(Unix 时间戳:1296626400)到今天获取数据时

https://graph.facebook.com/me/home?access_token=[AUTH_TOKEN]&since=1296626400&limit=4

它返回数据，此外它还返回转到下一页的 URL

{
   "data": [
      <ARRAY OF POSTS HERE>
   ],
   "paging": {
      "previous": "https://graph.facebook.com/me/home?access_token=[NEW_AUTH_TOKEN]&since=1298026753&limit=4",
      "next": "https://graph.facebook.com/me/home?access_token=[NEW_AUTH_TOKEN]&limit=4&until=1298023222"
   }
}

您可以安全地使用 JSON 对象的 previous 和 next 属性跳转到下一页(或上一页)。这似乎是最简单的方法。

顺便说一句，\u00257C 需要转换为 | 才能正常工作。

关于javascript - facebook javascript API 中的分页如何工作？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5023757/

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