如何从外部网站重新创建图像预览？ [英] How to recreate an image preview from outside websites?

问题描述

与Facebook的用户界面类似，我正在尝试从外部链接网站生成预览图像。因此，当用户键入他正在链接的URL时，UI将默认扫描该网站以获取img并刮擦预览拇指。

Similar to Facebook's UI, I am attempting at generating a preview image from an external linked website. So that when a user types in a url he is linking, the UI will by default, scan that site for an img and scrape a preview thumb.

是否有特定的这种技术的名称？或者有人能指出我学习这个的方向吗？

Is there a specific name for this technique? Or can anyone point me in the direction of learning this?

非常感谢！

推荐答案

它叫做刮擦。有一个名为scrAPI的库。

Its called scraping. There is a library called scrAPI.

这是一个代码示例 http://crunchlife.com/articles/2007/08/13/code-snippet-ruby-image-scraper

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