如何在html中获取网页链接的小缩略图

Question

我打算在我的 Gatsby 网页上显示其他人的博客文章列表作为链接。我不想在 html 中添加图像和标题，而是从博客文章/网页中提取信息。就像 WhatsApp 如何在附加的快照中获得一个小缩略图一样： 我是否必须从页面中提取信息，或者是否有图书馆可以为我做到这一点？

Answer 1

如果您拥有这些网站，您可以允许X-Frame-Options: ALLOW-FROM [uri]。如果您不这样做，大多数网站将无法运行。

否则，您将不得不手动或使用预定过程截取屏幕截图并保留图像。

$(document).ready(function() {
  var mouseX;
  var mouseY;
  $(document).mousemove( function(e) {
     mouseX = e.pageX; 
     mouseY = e.pageY;
  });  

  $('a').mouseover(function() {
    console.log('mouse over <a />');
    console.log(this.href);
    $('#previewFrame').attr('src', this.href);
    $('#frameContainer').css({'top':mouseY+20,'left':mouseX+20});
    $('#frameContainer').show();
  });
  
    $('a').mouseout(function() {
    console.log('mouse out of <a />');
    $('#frameContainer').hide();
  });
});

#frameContainer {
    display:none; position: absolute;
    background-color: #ffffff;
    height:1000px;
    width:1000px;
    overflow: hidden;
}

#previewFrame {
  transform-origin: left top;
  -webkit-transform:scale(0.2);
  -moz-transform-scale(0.2);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<a href="https://www.bbc.com">BBC</a> - Works<br/>
<div>Other texts and page content....................<div>
<div>Other texts and page content....................<div>
<div>Other texts and page content....................<div>
<a href="https://www.cnn.com/">CNN</a> - Won't work<br/>
<div>Other texts and page content....................<div>
<div>Other texts and page content....................<div>
<div>Other texts and page content....................<div>
<div>Other texts and page content....................<div>
<a href="https://stackoverflow.com/">stackoverflow</a> - Won't work<br/>
<div>Other texts and page content....................<div>
<div>Other texts and page content....................<div>
<div id='divtest' style='display:none; position: absolute;'>This is a test</div>
<div id="frameContainer">
  <iframe id='previewFrame' width="500" height="500" src="" style="">
  </iframe>
 </div>