我正在使用Facebook Graph NodeJS API
来抓取user_posts
。响应有分页,因此我需要循环响应以获取所有帖子。我正在使用以下路线来获取Facebook帖子,我正在使用get_user_statuses
函数循环分页:
var posts = "";
function get_user_statuses(response_posts, res) {
var link_regex = /https?:\/\/(?:www\.|(?!www))[^\s\.]+\.[^\s]{2,}|www\.[^\s]+\.[^\s]{2,}/g;
var isNextPageAvailable = true;
if ("paging" in response_posts) {
var nextPage = response_posts.paging.next;
isNextPageAvailable = true;
} else {
isNextPageAvailable = false;
}
for (var i = 0; i < response_posts.data.length; i++) {
var post = response_posts.data[i].message + " ";
if ("message" in response_posts.data[i]) {
posts += post.replace(link_regex, "");
}
}
if (nextPage !== undefined) {
request(nextPage, function (error, response, body) {
if (!error && response.statusCode === 200) {
get_user_statuses(JSON.parse(body));
} else {
console.log(error);
}
});
}
if (!isNextPageAvailable){
//Sending posts to facebook Modal
console.log(posts);
res.send(JSON.stringify({posts: posts})); //res is not defined here
}
}
router.post('/fbData', function (req, response, next) {
FB.setAccessToken(req.body.access_token);
FB.api('/me?fields=posts&posts.limit=1000', function (res) {
if (!res || res.error) {
if (!res) {
response.send(JSON.stringify({error: 'An error occurred. Please try again.'}))
}
response.send(JSON.stringify({error: response.error}));
return;
}
get_user_statuses(res.posts, response); //Passing response object here
});
});
问题是从response
函数中未定义从快递route
传递的get_user_statuses
对象。现在我有两个问题:
答案 0 :(得分:0)
我解决了我的问题。我需要使用回调创建一个函数。如果其他人遇到这种问题,这篇文章帮助我解决了这个问题:
[How to recurse asynchronously over API callbacks in node.js?
答案 1 :(得分:0)
res
未定义,因为您忘记在内部调用中传递它。将get_user_statuses(JSON.parse(body));
更改为get_user_statuses(JSON.parse(body), res);
,它应该可以正常工作