js-copy-and-send-image's Introduction

js-copy-and-send-image

最近有一个需求是把聊天窗口中的图片复制并发送给其他人。

但是，很不幸，chrome自从2012年以后就不支持JS复制网页图片，这个issue挂在chromium上很多年了，似乎并不打算支持了。

社区上比较著名的clipboard.js也不支持复制图片。

w3c新出的clipboard-apis同样不支持复制图片，社区其实是希望能支持的。

所以只好通过hack的方式来解决了。

解决思路如下：

1、复制图片的url

2、通过canvas转换为dataURL

3、将dataURL发往后端

4、后端返回新图片链接，插入到聊天窗口中

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