spider_work/xingchao_spider/get_sign.py

# -*- coding: utf-8 -*-
# Author : Charley
# Python : 3.10.8
# Date   : 2025/7/15 13:34
import hashlib
import json
import random
from urllib.parse import urlencode


def hex2int(hex_str):
    """
    将十六进制字符转换为整数
    :param hex_str:
    :return:
    """
    code = ord(hex_str.upper())
    if 48 <= code <= 57:
        return code - 48
    elif 65 <= code <= 70:
        return code - 65 + 10
    else:
        raise ValueError(f"Invalid hex character: {hex_str}")


def get_real_string():
    """
    secret/suffix：是通过 GetRealString() 生成的随机字符串的一部分。
    :return: secret/suffix, nonce
    """
    base_str = "3e7e6843bcb7ef0a"
    secret = ""
    arr = []
    for _ in range(16):
        num = format(random.randint(0, 15), 'x')  # 0~15 转16进制字符
        arr.append(num)
        secret += base_str[hex2int(num)]
    return secret, ''.join(arr)


def gen_sign(suffix, params, ts):
    """
    生成 sign 的值
    :param suffix:
    :param params:
    :param ts:
    :return: sign
    """
    params['timestamp'] = ts

    # 去空值
    cleaned_params = {
        k: v for k, v in params.items()
        if v is not None and v != ''
    }

    # 排序并构建新字典
    sorted_keys = sorted(cleaned_params.keys())
    new_params = {}
    for key in sorted_keys:
        value = cleaned_params[key]
        if isinstance(value, list):
            new_params[key] = json.dumps(value, separators=(',', ':'))
        else:
            new_params[key] = str(value)

    # 拼接参数字符串
    params_str = urlencode(new_params, doseq=True)

    # 计算签名
    sign_ = hashlib.md5((params_str + suffix).encode('utf-8')).hexdigest()

    return sign_


def get_sign(params, timestamp):
    """
    获取 sign , 封装
    :param params: get请求时是:params    post请求时是data
    :param timestamp:
    :return:
    """
    # 获取随机字符串和 nonce
    suffix_, nonce = get_real_string()

    # 生成 sign 和 timestamp
    sign = gen_sign(suffix_, params, timestamp)

    return sign, nonce


if __name__ == '__main__':
    # 示例参数
    # params = {
    #     'name': 'test',
    #     'age': 25,
    #     'tags': ['a', 'b']
    # }

    base_url = "https://api.xingchao6.com"
    url_ = "/AppClient/v1.1/product/list/page"
    url = base_url + url_

    # timestamp = int(time.time() * 1000)
    #
    # data = {
    #     "page": 1,
    #     "page_size": 10,
    #     # "timestamp": 1752552031885
    #     "timestamp": timestamp
    # }
    # # 获取随机字符串和 nonce
    # suffix_, nonce = get_real_string()
    #
    # # 生成 sign 和 timestamp
    # sign, timestamp = gen_sign(suffix_, data, timestamp)
    #
    # print("suffix:", suffix_)
    # print("nonce:", nonce)
    # print("timestamp:", timestamp)
    # print("sign:", sign)
    #
    # headers = {
    #     "User-Agent": "Mozilla/5.0 (Linux; Android 11; Pixel 5 Build/RQ3A.211001.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 uni-app Html5Plus/1.0 (Immersed/52.727272)",
    #     "Connection": "Keep-Alive",
    #     "Accept": "application/json",
    #     "Accept-Encoding": "gzip",
    #     "Content-Type": "application/json",
    #     "Cache-Control": "no-cache",
    #     # "sign": "3c5028da758dc416455f575334cadaab",
    #     "sign": sign,
    #     # "x-token": "782a2174df1a19aa26904dad1d347c97",
    #     "client": "yingyongbao",
    #     "appversion": "2.1.6",
    #     "nonce": nonce,
    #     # "deviceid": "null",
    #     "jrd": "100d85590861f713a85",
    #     "timestamp": f"{timestamp}"
    # }
    #
    # # 发送 POST 请求
    # response = requests.post(
    #     url,
    #     json=data,  # 注意：这里使用 data 参数发送表单数据
    #     headers=headers
    # )
    #
    # print("Status Code:", response.status_code)
    # print("Response Body:", response.json())