1. Introduction
? In my work some time ago, I encountered a scenario where I clicked a button to download a picture. This is a very common scenario in business, but what is special is that this time I need to browse on the mobile terminal. Click-to-download can be realized in scenarios such as browsers and WeChat internal browsers. After many explorations and practices, I finally found that with my current ability and available information, in today’s complex domestic mobile browser environment (Baidu Browser, QQ Browser, UC Browser, Quark Browser) and the built-in browsers of major mobile phone manufacturers, etc.), each of them has different security strategies. It is impossible to implement a universal click-to-download covering all mainstream browsers on the mobile terminal, because The various implementation methods I know basically rely on the tag or the