我如何检测Imgur图片链接是什么，什么不是？-Java 学习之路

我正在尝试以编程方式确定链接是否是指向Imgur图像的链接 . Imgur图像链接的一个示例是：http://imgur.com/0AKSCQ4或http://i.imgur.com/0AKSCQ4.jpg（第一个是间接链接，后者是直接链接，但ID保持不变）

当被问及是否有Imgur链接，但是http://imgur.com/gallery是 false 时，我希望http://imgur.com/0AKSCQ4评估为 true . 我'm confused how to distinguish between those two when they'都是 imgur.com/*letters* .

我问，因为我知道Reddit Enhancement Suite有这个功能 . 如果我发布http://imgur.com/gallery它没有提供图像按钮来预览它，但它会为http://imgur.com/0AKSCQ4

那我怎么能识别这个呢？查找不符合条件的每个单词，例如_2837009中的 gallery ， jobs 或 about ，看起来真的很骇人听闻，并会破坏任何添加的新页面 . 第二部分并不总是数字，所以我不能依靠它来识别它 .

2 回答

Run this snippet for a JavaScript example

$(function(){
  
    var url_re = /https?[^<"]+/g  /* pattern for url-like substrings */
    
    var txt = $(".post-text").html(); /* taking this question text as input */
  
	while(m = url_re.exec(txt)){ /* match all url-like substrings in input */
      
        /* verify if it's a imgur URL */
      
		var imgur_re = /^https?:\/\/(\w+\.)?imgur.com\/(\w*\d\w*)+(\.[a-zA-Z]{3})?$/
        
        
        /* Show result */
        
        $("#results").append("<li>" + m + ": " + imgur_re.test(m) + "</li>");
	}
  
});

<ul id="results"></ul>

<div class="post-text" itemprop="text">
<p>I'm trying to programmatically figure out whether or not an link is a link to an Imgur image or not. An example of an Imgur image link would be: <a href="http://imgur.com/0AKSCQ4" rel="nofollow">http://imgur.com/0AKSCQ4</a> or <a href="http://i.imgur.com/0AKSCQ4.jpg" rel="nofollow">http://i.imgur.com/0AKSCQ4.jpg</a> (the first is an indirect link and the latter is direct, but the ID stays the same)</p>

<p>I want <a href="http://imgur.com/0AKSCQ4" rel="nofollow">http://imgur.com/0AKSCQ4</a> to evaluate to <code>true</code> when asked if an Imgur link, but <a href="http://imgur.com/gallery" rel="nofollow">http://imgur.com/gallery</a> to be <code>false</code>. I'm confused how to distinguish between those two when they're both <code>imgur.com/*letters*</code>.</p>

<p>I ask because I know <a href="http://redditenhancementsuite.com" rel="nofollow">Reddit Enhancement Suite</a> has this functionality. If I post <a href="http://imgur.com/gallery" rel="nofollow">http://imgur.com/gallery</a> it doesn't offer an image button to preview it, but it would for <a href="http://imgur.com/0AKSCQ4" rel="nofollow">http://imgur.com/0AKSCQ4</a></p>

<p>So how would I be able to identify this? Finding every word that doesn't qualify, like <code>gallery</code>, <code>jobs</code>, or <code>about</code> in <code>imgur.com/*whatever*</code> would seem really hacky, and would break upon any new page being added. And there's not <em>always</em> numbers in the second part so I can't rely on that to identify it.</p>
</div>


<script type="text/javascript" src="//code.jquery.com/jquery-2.1.1.min.js"></script>

回复于 2024-05-06T15:18:54+08:00

这个正则表达式：

/(?>https?:)?\/\/(\w+\.)?imgur\.com\/(\S*)(\.[a-zA-Z]{3})/m

将匹配：

https://i.imgur.com/55bm5QS.png
//i.imgur.com/JiAKOkJ.png
http://i.imgur.com/JiAKOkJ.png

由kums提供的正则表达式与此不匹配：http://i.imgur.com/JiAKOkJ.png

回复于 2024-05-06T15:18:54+08:00

我如何检测Imgur图片链接是什么，什么不是？

2 回答

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