抖音最新发布上传视频signature分析

前几天。抖音网页版发布视频最后布加入了signature。

原因是前端时间很多人在使用网页版发布视频的连续怼视频。1天发布1W+等之类的硬广告

所以没有正确的SIGNATURE发布会直接显示,视频未通过

自己也尝试分析了下。但是还是没有提取出来。具体那个步骤出错还不清楚。

分析如下

发布POST如下

media.douyin.com/web/api/media/aweme/create/?_signature=tVydtAAgEA1Hc6.zclu8-LVcnaAAOjK

video_id=v0200f550000bngc777a1hai6lt6tlrg&poster=tos-cn-p-0015%2Fa456e85a0e014581b8e3e9d92db53af1&poster_delay=0&text=123456789&text_extra=%5B%5D&visibility_type=0&challenges=%5B%5D&mentions=%5B%5D&third_text=123456789&download=0&upload_source=1&shop_draft_id=&mix_id=&mix_order=

其余参数都可以在其他地方获取到。具体的我不分析了,我只对signature分析

谷歌浏览器,web开发工具插件
点开SOURCES资源。搜索signature

查找结果如下。一个个查看下。最终确定在最后一个

点击括号格式化代码

在当前的文档搜索signature

可以看到_signature是由i赋值过来的。

var i = Object(_byted_acrawler__WEBPACK_IMPORTED_MODULE_1__.sign)(o);

如我们不确定可以在这里下个断。上面截图中就是断下的i的值。证明我们是找对了地方的

_byted_acrawler__WEBPACK_IMPORTED_MODULE_1__这猜测是一个函数,但是又是什么玩意?玩上翻多几行。可以看到。

_byted_acrawler__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(“43703b0f330bf4830f6c”)

是通过webpack打包工具之后的一个请求。

继续全资源搜索这个43703b0f330bf4830f6c

只有2个地方出现过。我们点进去看看再说,

截去出来

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  4. '\x13e(e,a,r){\x14(b[e]||(b[e]=t("x,y","\x14x "+e+" y"\x15)(r,a)}\x13a(e,a,r){\x14(k[r]||(k[r]=t("x,y","\x14new x[y]("+Array(r+1).join(",x[\x16y]")\x17(1)+")"\x15)(e,a)}\x13r(e,a,r){\x18n,t,s={},b=s.d=r?r.d+1:0;for(s["$"+b]=s,t=0;t<b;t\x16)s[n="$"+t]=r[n];for(t=0,b=s\x19=a\x19;t<b;t\x16)s[t]=a[t];\x14c(e,0,s)}\x13c(t,b,k){\x13u(e){v[x\x16]=e}\x13f\x1a{\x14g=\x12,t\x17ing(b\x1bg)}\x13l\x1a{try{y=c(t,b,k)}catch(e){h=e,y=l}}for(\x18h,y,d,g,v=[],x=0;;)switch(g=\x12){case 1:u(!\x11)\x1c4:\x10f\x1a\x1c5:u(\x13(e){\x18a=0,r=e\x19;\x14\x13\x1a{\x18c=a<r;\x14c&&u(e[a\x16]),c}}(\x11\x15\x1c6:y=\x11,u(\x11(y\x15\x1c8:if(g=\x12,l\x1a\x1bg,g=\x12,y===c)b+=g;else if(y!==l)\x14y\x1c9:\x10c\x1c10:u(s(\x11\x15\x1c11:y=\x11,u(\x11+y)\x1c12:for(y=f\x1a,d=[],g=0;g<y\x19;g\x16)d[g]=y.charCodeAt(g)^g+y\x19;u(String.fromCharCode.apply(null,d\x15\x1c13:y=\x11,h=delete \x11[y]\x1c14:\x10\x12\x1c59:u((g=\x12)?(y=x,v.slice(x-=g,y\x15:[])\x1c61:u(\x11[\x12])\x1c62:g=\x11,k[0]=65599*k[0]+k[1].charCodeAt(g)>>>0\x1c65:h=\x11,y=\x11,\x11[y]=h\x1c66:u(e(t[b\x16],\x11,\x11\x15\x1c67:y=\x11,d=\x11,u((g=\x11).x===c?r(g.y,y,g.z):g.apply(d,y\x15\x1c68:u(e((g=t[b\x16])<"<"?(b--,f\x1a):g+g,\x11,\x11\x15\x1c70:u(!1)\x1c71:\x10n\x1c72:\x10+f\x1a\x1c73:u(parseInt(f\x1a,36\x15\x1c75:if(\x11){b\x16\x1dcase 74:g=\x12<<16>>16\x1bg\x1c76:u(k[\x12])\x1c77:y=\x11,u(\x11[y])\x1c78:g=\x12,u(a(v,x-=g+1,g\x15\x1c79:g=\x12,u(k["$"+g])\x1c81:h=\x11,\x11[f\x1a]=h\x1c82:u(\x11[f\x1a])\x1c83:h=\x11,k[\x12]=h\x1c84:\x10!0\x1c85:\x10void 0\x1c86:u(v[x-1])\x1c88:h=\x11,y=\x11,\x10h,\x10y\x1c89:u(\x13\x1a{\x13e\x1a{\x14r(e.y,arguments,k)}\x14e.y=f\x1a,e.x=c,e.z=k,e}\x1a)\x1c90:\x10null\x1c91:\x10h\x1c93:h=\x11\x1c0:\x14\x11;default:u((g<<16>>16)-16)}}\x18n=this,t=n.Function,s=Object.keys||\x13(e){\x18a={},r=0;for(\x18c in e)a[r\x16]=c;\x14a\x19=r,a},b={},k={};\x14r'.replace(/[\x10-\x1f]/g, function(e) {
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  7. value: !0
  8. })])
  9. }

看过我之前写的无水印下载的那文章,其实是很相识的。

var i = Object(_byted_acrawler__WEBPACK_IMPORTED_MODULE_1__.sign)(o);中的o是


但是我在c

因为我这里要求不用到模块,调用。要扒出来用。

后面扒出来之后生成的signature不对。卡在这里了….

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