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function/h5st.ts

@@ -0,0 +1,72 @@
+import axios from "axios"
+import {format} from "date-fns"
+import * as CryptoJS from 'crypto-js'
+
+class H5ST {
+  tk: string;
+  timestamp: string;
+  rd: string;
+  appId: string;
+  fp: string;
+  time: number;
+  ua: string
+  enc: string;
+
+  constructor(appId: string, ua: string, fp: string) {
+    this.appId = appId
+    this.ua = ua
+    this.fp = fp || this.__genFp()
+  }
+
+  __genFp() {
+    let e = "0123456789";
+    let a = 13;
+    let i = '';
+    for (; a--;)
+      i += e[Math.random() * e.length | 0];
+    return (i + Date.now()).slice(0, 16)
+  }
+
+  async __genAlgo() {
+    this.time = Date.now()
+    this.timestamp = format(this.time, "yyyyMMddHHmmssSSS")
+    let {data} = await axios.post(`https://cactus.jd.com/request_algo?g_ty=ajax`, {
+      'version': '3.0',
+      'fp': this.fp,
+      'appId': this.appId.toString(),
+      'timestamp': this.time,
+      'platform': 'web',
+      'expandParams': ''
+    }, {
+      headers: {
+        'Host': 'cactus.jd.com',
+        'accept': 'application/json',
+        'content-type': 'application/json',
+        'user-agent': this.ua,
+      }
+    })
+    this.tk = data.data.result.tk
+    this.rd = data.data.result.algo.match(/rd='(.*)'/)[1]
+    this.enc = data.data.result.algo.match(/algo\.(.*)\(/)[1]
+  }
+
+  __genKey(tk: string, fp: string, ts: string, ai: string, algo: object) {
+    let str = `${tk}${fp}${ts}${ai}${this.rd}`;
+    return algo[this.enc](str, tk)
+  }
+
+  __genH5st(body: object) {
+    let y = this.__genKey(this.tk, this.fp, this.timestamp, this.appId, CryptoJS).toString(CryptoJS.enc.Hex)
+    let s = ''
+    for (let key of Object.keys(body)) {
+      key === 'body' ? s += `${key}:${CryptoJS.SHA256(body[key]).toString(CryptoJS.enc.Hex)}&` : s += `${key}:${body[key]}&`
+    }
+    s = s.slice(0, -1)
+    s = CryptoJS.HmacSHA256(s, y).toString(CryptoJS.enc.Hex)
+    return encodeURIComponent(`${this.timestamp};${this.fp};${this.appId.toString()};${this.tk};${s};3.0;${this.time.toString()}`)
+  }
+}
+
+export {
+  H5ST
+}