不起眼的Data协议

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匿名技术用户   2020-12-27 17:57   738   0

协议格式: data:资源类型;编码,内容
常用来显示小图片,因为base64编码会增大1/3体积,浏览器解析是占用更多资源,也无法缓存图片,html上不能复用,只能放在css或javascript里,这样就不能像其他图片那样与css,javascript并行下载了。有好有坏。
http://www.wooyun.org/bugs/wooyun-2010-041641 大牛研究Data协议
例:显示文字 ;ascii,这是Data协议
显示图片 data:image/gif;base64,R0lGODlhGAAYAPf/AP/7mv7nT//+0P/tV//aOf/pT//SLv/XNP/+x//mSP/5iP/9uP/0bf7ePtKMGv/3eP/3d//cOv/KJf/iQv7FIf/8sv/PKv/MJ//2dNKOH/+7FOOWCv+2D/20EP/4e/7hRf/gQu7Wdv3dQ+7Vb/vUONqNC//LKe7MQu7FN/TCLv+8FP+3Ef/6lvGsEuumFvCjCtedMeafEP3fRdKOItWOEc6EDv+4Efi3G/myE+SYCrhfAMp7EP/vWoczAP/xX/bm0NfRzOi0Mf/lR//FH3wtANfSzf/qUP/wXf/LJv/DHf/sU//GIP/7lf/VMf/AGv/RLf/pTfv6+tzX0+Pf3P/SLf/oTF0jAP/dPd3Y1Orn5NKPKf/rUP/ePP/AGf/dPP/rU8urmdKNHP+5Ev/DHP+5E//UMf/GIdKMGf/ePf/89eXDau+zMNKPLdixa713FPjKX8t9CPXBS/fIW+fe0P79/P3XOcmphriESf+6E/bGWfe8N+7CUtLFuP38/P/+/PfKZ+bi3/CwH+24S9KPJv//1/jbmv/899/a1tjTzq5wLO7TZdKLGPPesMivltiVFbd7MruRZfzPNPvhpfDu7NKWM+G/jNeeOMeCFrFzK/Ty8erj3KxtJfvLMPrNN9eaI9ecKtmYIf346/nEJfry5/fGKvW3KfbEL8iQPsCXZ/bYmeGgIeWmJvHIWN7Z1ffBRb1/LvuvDO7Wg8KKPujl4vzw1u65Nt2cGN2cH+CfJM2sg+3HU6hdCfW5M+ro5enIkbNvGuTg3dylRP/xYP/oTcuJGs2JH/zlr//bOdmkQsyLIqdgEKpjE7SAR7eCRcWebfncnPOpDbmIU/jGMPnGMK5mD8J8FNnUz86ACPOxF//3e+aqH//RLv7JJfSnC//gQf/CHf/HIPjHMf/wXP/1bf/9sv2yDP/xXf/3fP7dPv2xC//2c//QK/mzFPSnDPi4Gv/HIf7JJv/uV//pTPOxGO7JPf/ZOeaqIP/qUf/CHP64E/65Ev65E+7DM//UMP///////yH/C05FVFNDQVBFMi4wAwEAAAAh+QQFDwD/ACwAAAAAGAAYAAAI/wD/CRxIsKDBgwgTKkxj7I2rUrzi/HlGS+FASXo6ifjgDV2dSNJYMVJoSM60AFCGpUwwIUI/TrX2IPSTJ9yXHvGO+DgSz0gPLk24BdJ1sJCpAj2EjYPgAcI4HzcjPKGAS03BUGtk9AizY8YIAEwUZdjhoMcBJDeQzSGYKsXWH/5+aFlAbhDcH4t6WBjjok2UgYJIFNjhr/AOAQgIG76ybQg7SrMGrroChTAYIjsICbCMGY2BJfmISRmo6kqVMD+IWGGDWEtqK2fQUBki5lKRgbeOJTjxqZilWHRDwMjgCcUxC0lsVAMyENSBCVt8qFPABKwCDMK2TDjbpYMb5gKDkbmKIESJj3EPzjmFKkTqOw3dXt0W6EtbGS5CjOTc2VOIlyZIOMFBCc5gMdAoyYhCgA5BBKEDgw4yeME3ZLzwCB+9EFSJLUjw8CAPHuoAog5JaJAONagc8tdAdJziiBkgUmEAiEiA4wQesFxzRxFZHCQLDfOYMMQSQ3zThQoc5LBMNEBMkVAuv9QQQwtidADNBnAk0og1gFikiR3NYLKLMpswAwkQrWRikUB9TDIFFkAgIgUwPa5pZ0EBAQAh+QQFDwD/ACwDAAMAEgASAAAIhQD/CRwoEEQDgggH9vhXpUCVgU0SCuxx75+5gVsEloGHsIcSHwKzPfgnTMm/Y1QI9qAnsSVDlwTXJYGJ0MuTfzhoJtSHRuc/LzQrSByzQqCRfxgS+jgq0InAYwQheBhoUqAZFQKbXBE4QNw/rwK5/JOAsB7NmQTJwsTjUyc2gjM1tCXjMiAAIfkEBQ8A/wAsAwADABIAEgAACJAA/wkcKNAbwYMEAwgcNrAHQoHSvjg8InDAPyE9mnA7WMAhgwcDfVx0SFAGyYEsBp7h59CdwJMPBR6zgC+mzX/s/jH85++mwH3/5Pn8x2XbUIRJbAzdMrBLuX8R/n0hCJKggSUa2tkr4+XflngUKQ4sg+QgAZ9jDpa1OUYDwiUCnwy8YKbL0CECnag4+k+MzYAAOw==

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