从媒体 ID 获取 Instagram 帖子网址 [英] Getting instagram post url from media id

问题描述

我手头有帖子 media_id，我想知道是否有办法从中创建有效的网址.

I have the post media_id in my hands and I'd like to know if there is a way to create a valid url from it.

例如，如果您手上有 Facebook 帖子 ID (xxxx_yyyy)，您可以从中创建以下网址 (http://facebook.com/xxxx/posts/yyyy) 并直接访问原始帖子.

For instance, if you have a Facebook post id (xxxx_yyyy) on your hands, you can create the following url from it (http://facebook.com/xxxx/posts/yyyy) and directly access the original post.

有没有办法在 Instagram 上做到这一点?有 media_id(和 user_id)在我手中，是否可以创建单个帖子 url?

Is there a way to do this on Instagram? Having media_id (and user_id) in my hands, is it possible to create a single post url?

推荐答案

我不得不实现客户端 javascript 来解决这个问题，Seano 的回答非常宝贵，我很高兴他们提到了 BigInteger 库的使用，但是我想提供一个使用 BigInteger 库完成实现，事实证明这是非常必要的.

I had to implement client side javascript to solve this and Seano's answer was invaluable and I was glad they mentioned the use of the BigInteger library however I wanted to provide a complete implementation using the BigInteger library which as it turns out is quite necessary.

我从 https://www.npmjs.com/package/big- 下载了 BigInteger 库整数.

这是对我来说效果很好的函数.

Here is the function which works well for me.

function getInstagramUrlFromMediaId(media_id) {
    var alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';
    var shortenedId = '';
    media_id = media_id.substring(0, media_id.indexOf('_'));

    while (media_id > 0) {
        var remainder = bigInt(media_id).mod(64);
        media_id = bigInt(media_id).minus(remainder).divide(64).toString();
        shortenedId = alphabet.charAt(remainder) + shortenedId;
    }

    return 'https://www.instagram.com/p/' + shortenedId + '/';
}

我只想指出，在分配重新计算的 media_id 时 toString() 的用法非常重要，该值仍然是一个字符串以确保使用整个数字(在我的情况下，media_id 是 19 个字符长).BigInteger 文档也说明了这一点...

I just want to point out that the usage of toString() when assigning the re-calculated media_id is very important, the value remains a string to ensure the entire number is used (in my case the media_id was 19 characters long). The BigInteger documentation also states this...

请注意，大于 9007199254740992 且小于 -9007199254740992 的 Javascript 数字不是精确表示的数字，不会产生准确的结果.如果您要处理该范围之外的数字，最好传入字符串.

Note that Javascript numbers larger than 9007199254740992 and smaller than -9007199254740992 are not precisely represented numbers and will not produce exact results. If you are dealing with numbers outside that range, it is better to pass in strings.

干杯！

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