help！ help！Replace the url of the image before rendering the page.

Picasso shief

How replace the url of the image before rendering the page.

because post image need to be authenticated, I need to add signature params to all image url before the page is rendered

Which methods should I hook for replacement?

Such as:
<img src="http://xxxxi.oss-cn-beijing.aliyuncs.com/1.png" alt="" class="img-responsive img-markdown">

become below

Picasso shief

@picasso-shief @baris hi ～buddy，can you help me

Unsolved help！ help！Replace the url of the image before rendering the page.