基于html5的canvas对表单中上传的图片尺寸进行本地检测
虽然单纯用前端来做上传检测是不靠谱的,但很多时候是普通用户没有恶意的点了一个不合规格的文件而已。在前端直接挡掉这一部分请求应该还是能缓解一些压力的。
基于html5的canvas对表单中上传的图片尺寸进行本地检测
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